util/promotions library

Classes

AbsoluteKeyframe<T>
AbsoluteResizablePaneController
AbsorbPointer: A widget that absorbs pointers during hit testing.
AbstractButtonStyle
AbstractLayoutBuilder<LayoutInfoType>: An abstract superclass for widgets that defer their building until layout.
AbstractNavigationButton
AcceptSuggestionIntent: Intent for accepting the currently selected autocomplete suggestion.
Accordion: A container widget that displays a list of collapsible items with only one item expanded at a time.
AccordionItem: An individual item within an Accordion that can be expanded or collapsed.
AccordionState
AccordionTheme: Theme configuration for Accordion, AccordionItem, and AccordionTrigger widgets.
AccordionTrigger: A specialized trigger widget designed for use within AccordionItem.
Accumulator: Mutable wrapper of an integer that can be passed by reference to track a value across a recursive stack.
Action<T extends Intent>: Base class for an action or command to be performed.
ActionDispatcher: An action dispatcher that invokes the actions given to it.
ActionListener: A helper widget for making sure that listeners on an action are removed properly.
Actions: A widget that maps Intents to Actions to be used by its descendants when invoking an Action.
ActivateAction: An Action that activates the currently focused control.
ActivateIntent: An Intent that activates the currently focused control.
ActiveDotItem
Adapter: Adapters provide a mechanism to drive an animation from an arbitrary source. For example, synchronizing an animation with a scroll, controlling an animation with a slider input, or progressing an animation based on the time of day.
AdaptiveScaler
AdaptiveScaling
Alert: A versatile alert component for displaying important messages or notifications.
AlertDialog: A modal dialog component for displaying important alerts and confirmations.
AlertTheme: Theme configuration for Alert components.
Align: A widget that aligns its child within itself and optionally sizes itself based on the child's size.
AlignEffect: An effect that animates the target between the specified begin and end alignments (via Align). Defaults to begin=Align.topCenter, end=Align.center.
Alignment: A point within a rectangle.
AlignmentDirectional: An offset that's expressed as a fraction of a Size, but whose horizontal component is dependent on the writing direction.
AlignmentGeometry: Base class for Alignment that allows for text-direction aware resolution.
AlignmentGeometryTween: An interpolation between two AlignmentGeometry.
AlignmentTween: An interpolation between two alignments.
AlignTransition: Animated version of an Align that animates its Align.alignment property.
AlwaysScrollableScrollPhysics: Scroll physics that always lets the user scroll.
AlwaysStoppedAnimation<T>: An animation that is always stopped at a given value.
AndroidView: Embeds an Android view in the Widget hierarchy.
AndroidViewSurface: Integrates an Android view with Flutter's compositor, touch, and semantics subsystems.
Animatable<T>: An object that can produce a value of type T given an Animation<double> as input.
Animate: The Flutter Animate library makes adding beautiful animated effects to your widgets simple. It supports both a declarative and chained API. The latter is exposed via the Widget.animate extension, which simply wraps the widget in Animate.
AnimatedAlign: Animated version of Align which automatically transitions the child's position over a given duration whenever the given alignment changes.
AnimatedBuilder: A general-purpose widget for building animations.
AnimatedCheckPainter: Custom painter for drawing animated checkmarks in checkboxes.
AnimatedContainer: Animated version of Container that gradually changes its values over a period of time.
AnimatedCrossFade: A widget that cross-fades between two given children and animates itself between their sizes.
AnimatedDefaultTextStyle: Animated version of DefaultTextStyle which automatically transitions the default text style (the text style to apply to descendant Text widgets without explicit style) over a given duration whenever the given style changes.
AnimatedFractionallySizedBox: Animated version of FractionallySizedBox which automatically transitions the child's size over a given duration whenever the given widthFactor or heightFactor changes, as well as the position whenever the given alignment changes.
AnimatedGrid: A scrolling container that animates items when they are inserted into or removed from a grid. in a grid.
AnimatedGridState: The State for an AnimatedGrid that animates items when they are inserted or removed.
AnimatedList: A scrolling container that animates items when they are inserted or removed.
AnimatedListState: The AnimatedListState for AnimatedList, a scrolling list container that animates items when they are inserted or removed.
AnimatedModalBarrier: A widget that prevents the user from interacting with widgets behind itself, and can be configured with an animated color value.
AnimatedOpacity: Animated version of Opacity which automatically transitions the child's opacity over a given duration whenever the given opacity changes.
AnimatedPadding: Animated version of Padding which automatically transitions the indentation over a given duration whenever the given inset changes.
AnimatedPhysicalModel: Animated version of PhysicalModel.
AnimatedPositioned: Animated version of Positioned which automatically transitions the child's position over a given duration whenever the given position changes.
AnimatedPositionedDirectional: Animated version of PositionedDirectional which automatically transitions the child's position over a given duration whenever the given position changes.
AnimatedProperty<T>
AnimatedRotation: Animated version of Transform.rotate which automatically transitions the child's rotation over a given duration whenever the given rotation changes.
AnimatedScale: Animated version of Transform.scale which automatically transitions the child's scale over a given duration whenever the given scale changes.
AnimatedSize: Animated widget that automatically transitions its size over a given duration whenever the given child's size changes.
AnimatedSlide: Widget which automatically transitions the child's offset relative to its normal position whenever the given offset changes.
AnimatedSwitcher: A widget that by default does a cross-fade between a new widget and the widget previously set on the AnimatedSwitcher as a child.
AnimatedTheme
AnimatedValueBuilder<T>: A versatile animated widget that smoothly transitions between values.
AnimatedValueBuilderState<T>
AnimatedWidget: A widget that rebuilds when the given Listenable changes value.
AnimatedWidgetBaseState<T extends ImplicitlyAnimatedWidget>: A base class for widgets with implicit animations that need to rebuild their widget tree as the animation runs.
AnimateList<T extends Widget>: Applies animated effects to a list of widgets. It does this by wrapping each widget in Animate, and then proxying calls to all instances. It can also offset the timing of each widget's animation via interval.
Animation<T>: A value which might change over time, moving forward or backward.
AnimationController: A controller for an animation.
AnimationMax<T extends num>: An animation that tracks the maximum of two other animations.
AnimationMean: An animation of doubles that tracks the mean of two other animations.
AnimationMin<T extends num>: An animation that tracks the minimum of two other animations.
AnimationQueueController
AnimationRequest
AnimationRunner
AnimationStyle: Used to override the default parameters of an animation.
AnnotatedRegion<T extends Object>: Annotates a region of the layer tree with a value.
AppBar: A customizable application bar component for layout headers.
AppKitView: Widget that contains a macOS AppKit view.
AppLifecycleListener: A listener that can be used to listen to changes in the application lifecycle.
AspectRatio: A widget that attempts to size the child to a specific aspect ratio.
AssetBundle: A collection of resources used by the application.
AssetBundleImageKey: Key for the image obtained by an AssetImage or ExactAssetImage.
AssetBundleImageProvider: A subclass of ImageProvider that knows about AssetBundles.
AssetImage: Fetches an image from an AssetBundle, having determined the exact image to use based on the context.
AsyncSnapshot<T>: Immutable representation of the most recent interaction with an asynchronous computation.
AutoComplete: Intelligent autocomplete functionality with customizable suggestion handling.
AutocompleteFirstOptionIntent: An Intent to highlight the first option in the autocomplete list.
AutocompleteHighlightedOption: An inherited widget used to indicate which autocomplete option should be highlighted for keyboard navigation.
AutocompleteLastOptionIntent: An Intent to highlight the last option in the autocomplete list.
AutocompleteNextOptionIntent: An Intent to highlight the next option in the autocomplete list.
AutocompleteNextPageOptionIntent: An Intent to highlight the option one page after the currently highlighted option in the autocomplete list.
AutocompletePreviousOptionIntent: An Intent to highlight the previous option in the autocomplete list.
AutocompletePreviousPageOptionIntent: An Intent to highlight the option one page before the currently highlighted option in the autocomplete list.
AutoCompleteTheme: Theme configuration for AutoComplete widget styling and behavior.
AutofillGroup: An AutofillScope widget that groups AutofillClients together.
AutofillGroupState: State associated with an AutofillGroup widget.
AutofillHints: A collection of commonly used autofill hint strings on different platforms.
AutomaticKeepAlive: Allows subtrees to request to be kept alive in lazy lists.
AutomaticNotchedShape: A NotchedShape created from ShapeBorders.
Avatar: A circular or rounded rectangular widget for displaying user profile images or initials.
AvatarBadge: A circular badge widget designed to overlay on Avatar components.
AvatarGroup: A widget that arranges multiple AvatarWidgets in an overlapping layout.
AvatarGroupClipper
AvatarTheme: Theme configuration for Avatar and related avatar components.
AvatarWidget: Abstract base class for avatar-related widgets.
BackButtonDispatcher: Report to a Router when the user taps the back button on platforms that support back buttons (such as Android).
BackButtonListener: A convenience widget that registers a callback for when the back button is pressed.
BackdropFilter: A widget that applies a filter to the existing painted content and then paints child.
BackdropGroup: A widget that establishes a shared backdrop layer for all child BackdropFilter widgets that opt into using it.
BackdropKey: A backdrop key uniquely identifies the backdrop that a BackdropFilterLayer samples from.
BackdropTransformData
BadgeTheme: Theme data for customizing badge widget appearance across different styles.
BallisticScrollActivity: The activity a scroll view performs after being set into motion.
Banner: Displays a diagonal message above the corner of another widget.
BannerPainter: Paints a Banner.
Baseline: A widget that positions its child according to the child's baseline.
Basic
BasicLayout: Same as basic, but without forcing the text style
BasicTheme
BehaviorSubject<T>: A special StreamController that captures the latest item that has been added to the controller, and emits that as the first item to any new listener.
BeveledRectangleBorder: A rectangular border with flattened or "beveled" corners.
BiDirectionalConvert<A, B>
BlockSemantics: A widget that drops the semantics of all widget that were painted before it in the same semantic container.
BlurEffect: An effect that animates a blur on the target between the specified begin and end blur radiuses (via ImageFiltered). Defaults to begin=0, end=4.
Bone: A widget that represents a bone of the loading skeleton effect
BoneMock: A class that provides mock data for generating fake
BoneRenderObject: The render object of the BoneRenderObjectWidget
BoneRenderObjectWidget: A widget that paints a BoxDecoration into a canvas with ManualSkeletonizerPaintingContext.
BootstrapIcons
Border: A border of a box, comprised of four sides: top, right, bottom, left.
BorderDirectional: A border of a box, comprised of four sides, the lateral sides of which flip over based on the reading direction.
BorderRadius: An immutable set of radii for each corner of a rectangle.
BorderRadiusDirectional: An immutable set of radii for each corner of a rectangle, but with the corners specified in a manner dependent on the writing direction.
BorderRadiusGeometry: Base class for BorderRadius that allows for text-direction aware resolution.
BorderRadiusTween: An interpolation between two BorderRadiuss.
BorderSide: A side of a border of a box.
BorderTween: An interpolation between two Borders.
BottomNavigationBarItem: An interactive button within either material's BottomNavigationBar or the iOS themed CupertinoTabBar with an icon and title.
BouncingScrollPhysics: Scroll physics for environments that allow the scroll offset to go beyond the bounds of the content, but then bounce the content back to the edge of those bounds.
BouncingScrollSimulation: An implementation of scroll physics that matches iOS.
BoxBorder: Base class for box borders that can paint as rectangles, circles, or rounded rectangles.
BoxConstraints: Immutable layout constraints for RenderBox layout.
BoxConstraintsTween: An interpolation between two BoxConstraints.
BoxDecoration: An immutable description of how to paint a box.
BoxPainter: A stateful class that can paint a particular Decoration.
BoxScrollView: A ScrollView that uses a single child layout model.
BoxShadow: A shadow cast by a box.
BoxShadowEffect: An effect that animates a BoxShadow between begin and end (via DecoratedBox). A value of null for either will be interpreted as a shadow that matches the other shadow but with a zero offset and blurRadius. You can also specify a borderRadius that defines rounded corners for the shadow. Defaults to begin=null, end=BoxShadow(color: Color(0x80000000), blurRadius: 8.0, offset: Offset(0.0, 4.0))
BranchLine: Abstract base class for defining tree branch line styles.
Breadcrumb: Navigation breadcrumb trail showing hierarchical path with customizable separators.
BreadcrumbTheme: Theme for Breadcrumb.
BuildContext: A handle to the location of a widget in the widget tree.
Builder: A stateless utility widget whose build method uses its builder callback to create the widget's child.
BuildOwner: Manager class for the widgets framework.
BuildScope: A class that determines the scope of a BuildOwner.buildScope operation.
Button: A versatile, customizable button widget with comprehensive styling and interaction support.
ButtonActivateIntent: An Intent that activates the currently focused button.
ButtonDensity: Defines the padding density for button components.
ButtonGroup: A widget that groups multiple buttons together with connected borders.
ButtonSize: Defines the relative size scaling for button components.
ButtonState<T extends Button>
ButtonStyle
ButtonStyleOverride
ButtonStyleOverrideData
ButtonStylePropertyAll<T>
ButtonTheme
ButtonVariance
CachedValueWidget<T>
Calendar: A highly customizable calendar widget supporting multiple selection modes.
CalendarGrid
CalendarGridData
CalendarGridItem
CalendarItem: Individual calendar date cell with interactive behavior and visual states.
CalendarTheme: Theme configuration for calendar widgets.
CalendarValue: Abstract base class representing calendar selection values.
CalendarView: Represents a specific month and year view in calendar navigation.
CallbackAction<T extends Intent>: An Action that takes a callback in order to configure it without having to create an explicit Action subclass just to call a callback.
CallbackContextAction<T extends Intent>
CallbackEffect: An effect that calls a callback function at a particular point in the animation. It includes a boolean value indicating if the animation is playing in reverse.
CallbackShortcuts: A widget that binds key combinations to specific callbacks.
Canvas: An interface for recording graphical operations.
CapturedData: CapturedData holds all the data captured from another context.
CapturedThemes: Stores a list of captured InheritedThemes that can be wrapped around a child Widget.
CapturedWrapper
CardButton: A button styled as a card with elevated appearance and extensive gesture support.
CardButtonTheme
CardImage: Interactive card component with an image and optional text content.
CardImageTheme: Theme configuration for CardImage components.
CardTheme: Theme data for customizing Card and SurfaceCard widget appearance.
Carousel: Interactive carousel widget with automatic transitions and customizable layouts.
CarouselController: A controller for the carousel.
CarouselDotIndicator: A dot indicator for the carousel.
CarouselFixedConstraint: A fixed carousel size constraint.
CarouselFractionalConstraint: A fractional carousel size constraint.
CarouselSizeConstraint: Size constraint for the carousel.
CarouselTheme: Theme data for Carousel.
CarouselTransition: A carousel layout.
CatmullRomCurve: An animation easing curve that passes smoothly through the given control points using a centripetal Catmull-Rom spline.
CatmullRomSpline: A 2D spline that passes smoothly through the given control points using a centripetal Catmull-Rom spline.
Center: A widget that centers its child within itself.
ChangeListener: An interface to provide a way to notify listeners.
ChangeNotifier: A class that can be extended or mixed in that provides a change notification API using VoidCallback for notifications.
ChangeNotifierAdapter: Drives an Animate animation from a ChangeNotifier. The valueGetter should provide a value in the range 0-1 when a change occurs.
CharacterActivator: A shortcut combination that is triggered by a key event that produces a specific character.
CharacterInputOTPChild
CharacterRange: A range of characters of a Characters.
Characters: The characters of a string.
CharCodec
ChartColorScheme
CheckboardPainter
Checkbox: Core checkbox widget with comprehensive theming and interaction support.
CheckboxController: Reactive controller for managing checkbox state with convenient methods.
CheckboxTheme: Theme configuration for Checkbox widget styling and visual appearance.
CheckedModeBanner: Displays a Banner saying "DEBUG" when running in debug mode. MaterialApp builds one of these by default.
ChildBackButtonDispatcher: A variant of BackButtonDispatcher which listens to notifications from a parent back button dispatcher, and can take priority from its parent for the handling of such notifications.
ChildVicinity: The relative position of a child in a TwoDimensionalViewport in relation to other children of the viewport.
Chip: Compact interactive element for tags, labels, and selections.
ChipButton: Specialized button component designed for use within chips.
ChipInput<T>
ChipInputController<T>: Reactive controller for managing chip input state with convenient methods.
ChipInputState<T>
ChipInputTheme: Theme configuration for ChipInput widget styling and behavior.
ChipTheme: Theme for Chip.
CircleBorder: A border that fits a circle within the available space.
CircularNotchedRectangle: A rectangle with a smooth circular notch.
CircularProgressIndicator: A circular progress indicator that displays task completion as a rotating arc.
CircularProgressIndicatorTheme: Theme configuration for CircularProgressIndicator components.
ClampingScrollPhysics: Scroll physics for environments that prevent the scroll offset from reaching beyond the bounds of the content.
ClampingScrollSimulation: An implementation of scroll physics that aligns with Android.
Clickable
ClipboardStatusNotifier: A ValueNotifier whose value indicates whether the current contents of the clipboard can be pasted.
ClipContext: Clip utilities used by PaintingContext.
ClipOval: A widget that clips its child using an oval.
ClipPath: A widget that clips its child using a path.
ClipRect: A widget that clips its child using a rectangle.
ClipRRect: A widget that clips its child using a rounded rectangle.
ClipRSuperellipse: A widget that clips its child using a rounded superellipse.
CloseMenuIntent
CodeSnippet: A syntax-highlighted code display widget with copy functionality.
CodeSnippetTheme: Theme configuration for CodeSnippet components.
CollapseTreeNodeIntent
Collapsible: A container widget that can show or hide its content with a collapsible interface.
CollapsibleContent: A content widget that shows or hides based on the parent Collapsible state.
CollapsibleState
CollapsibleStateData: Internal data structure for sharing collapsible state between child widgets.
CollapsibleTheme: Theme configuration for Collapsible, CollapsibleTrigger, and CollapsibleContent widgets.
CollapsibleTrigger: A trigger widget that controls the expansion state of its parent Collapsible.
Color: An immutable color value in ARGB format.
ColorDerivative
ColoredBox: A widget that paints its area with a specified Color and then draws its child on top of that color.
ColorEffect: An effect that animates a Color between begin and end, composited with the target using blendMode (via ColorFiltered). A color value of null will be interpreted as a fully transparent version of the other color. Defaults to begin=null, end=Color(0x800099FF).
ColorFilter: A description of a color filter to apply when drawing a shape or compositing a layer with a particular Paint. A color filter is a function that takes two colors, and outputs one color. When applied during compositing, it is independently applied to each pixel of the layer being drawn before the entire layer is merged with the destination.
ColorFiltered: Applies a ColorFilter to its child.
ColorHistoryGrid
ColorHistoryStorage
ColorInput
ColorInputController: Reactive controller for managing color input state with color operations.
ColorInputPopup
ColorInputSet
ColorInputTheme: Theme configuration for ColorInput widget styling and behavior.
ColorPickerSet
ColorPickingLayer
ColorPickingLayerScope
ColorPickingResult
ColorProperty: DiagnosticsProperty that has an Color as value.
Colors
ColorScheme
ColorSchemes
ColorShades
ColorSwatch<T>: A color that has a small table of related colors called a "swatch".
ColorTween: An interpolation between two colors.
Column: A widget that displays its children in a vertical array.
Command: Interactive command palette with search functionality and dynamic results.
CommandCategory
CommandEmpty
CommandItem
CompareTo<T extends Comparable<T>>
CompareWith<T extends Comparable<T>>
ComponentElement: An Element that composes other Elements.
ComponentTheme<T>
ComponentThemeButtonStyle<T extends ButtonTheme>
ComponentValueController<T>: A concrete implementation of ComponentController that manages a single value.
CompositedTransformFollower: A widget that follows a CompositedTransformTarget.
CompositedTransformTarget: A widget that can be targeted by a CompositedTransformFollower.
CompositeValidator<T>
CompoundAnimation<T>: An interface for combining multiple Animations. Subclasses need only implement the value getter to control how the child animations are combined. Can be chained to combine more than 2 animations.
ConditionalValidator<T>
Conduit<T>
Conjured
ConjuredColor
ConjuredDimension
ConjuredIdentity
ConjuredProgress
ConjuredSubtitle
ConjuredTitle
ConstantBreakpoint
ConstantTween<T>: A tween with a constant value.
ConstrainedBox: A widget that imposes additional constraints on its child.
ConstrainedLayoutBuilder<ConstraintType extends Constraints>: A specialized AbstractLayoutBuilder whose widget subtree depends on the incoming ConstraintType that will be imposed on the widget.
ConstrainedTableSize
ConstraintsTransformBox: A container widget that applies an arbitrary transform to its constraints, and sizes its child using the resulting BoxConstraints, optionally clipping, or treating the overflow as an error.
Container: A convenience widget that combines common painting, positioning, and sizing widgets.
ContentInsertionConfiguration: Configures the ability to insert media content through the soft keyboard.
ContextAction<T extends Intent>: An abstract Action subclass that adds an optional BuildContext to the isEnabled and invoke methods to be able to provide context to actions.
ContextCallbackAction<T extends Intent>
ContextMenu
ContextMenuButtonItem: The type and callback for a context menu button.
ContextMenuController: Builds and manages a context menu at a given location.
ContextMenuPopup
ContextMenuTheme: Theme for ContextMenuPopup and context menu widgets.
ContinuousRectangleBorder: A rectangular border with smooth continuous transitions between the straight sides and the rounded corners.
ControlledAnimation
ControlledCheckbox: Reactive checkbox with automatic state management and controller support.
ControlledChipInput<T>: Reactive chip input with automatic state management and controller support.
ControlledColorInput: Reactive color input with automatic state management and controller support.
ControlledComponentAdapter<T>: A widget adapter that bridges controlled component logic with custom UI implementations.
ControlledComponentData<T>: Immutable data container for controlled component state.
ControlledDatePicker
ControlledMultipleAnswer<T>: A controlled widget for managing multiple item selections with external state management.
ControlledMultipleChoice<T>: A controlled widget for managing single item selection with external state management.
ControlledMultiSelect<T>: Reactive multi-selection dropdown with automatic state management.
ControlledRadioGroup<T>: Reactive radio button group with automatic state management and exclusivity.
ControlledSelect<T>: Reactive single-selection dropdown with automatic state management.
ControlledSlider: Reactive slider with automatic state management and controller support.
ControlledStarRating: Reactive star rating widget with automatic state management and controller support.
ControlledSwitch
ControlledTimePicker: A controlled time picker widget for selecting time values with external state management.
ControlledToggle: A controlled version of Toggle that integrates with form state management.
ControlPoint: A control point used in defining the gradient mask for the blur effect.
ConvertedController<F, T>
CopySelectionTextIntent: An Intent that represents a user interaction that attempts to copy or cut the current selection in the field.
Countries: This class is a collection of all the countries.
CountryFlag: A widget that displays a country flag.
CrossFadedTransition: A widget that smoothly transitions between different child widgets.
CrossfadeEffect: An effect that crossfades the incoming child (including preceeding effects) with a new widget (via Stack and FadeTransition). It uses a builder so that the effect can be reused, but note that the builder is only called once when the effect initially builds.
Cubic: A cubic polynomial mapping of the unit interval.
Curve: An parametric animation easing curve, i.e. a mapping of the unit interval to the unit interval.
Curve2D: Abstract class that defines an API for evaluating 2D parametric curves.
Curve2DSample: A class that holds a sample of a 2D parametric curve, containing the value (the X, Y coordinates) of the curve at the parametric value t.
CurvedAnimation: An animation that applies a curve to another animation.
Curves: A collection of common animation curves.
CurveTween: Transforms the value of the given animation by the given curve.
CustomClipper<T>: An interface for providing custom clips.
CustomEffect: Provide an easy way to add custom animated effects via a builder method that accepts a BuildContext, target child, and calculated animation value between begin and end.
CustomMultiChildLayout: A widget that uses a delegate to size and position multiple children.
CustomPaint: A widget that provides a canvas on which to draw during the paint phase.
CustomPainter: The interface used by CustomPaint (in the widgets library) and RenderCustomPaint (in the rendering library).
CustomPainterSemantics: Contains properties describing information drawn in a rectangle contained by the Canvas used by a CustomPaint.
CustomScrollView: A ScrollView that creates custom scroll effects using slivers.
CustomSingleChildLayout: A widget that defers the layout of its single child to a delegate.
DashBorderMode: Adds a dashed border mode
DashedBorderSignal
DashedContainer
DashedContainerProperties
DashedLine
DashedLinePainter
DashedLineProperties
DashedPainter
Data<T>: A widget that provides the data to its descendants.
DataBuilder<T>: A widget that receives the data from the ancestor Data widget.
DataCell: The data for a cell of a DataTable.
DataHolder<T>: An interface that holds forwardable data.
DataMessenger<T>: DataMessenger is a widget that holds the forwardable data. The data is attached/received from the ForwardableData widget and then passed to the descendants. DataMessenger<T> can only store ForwardableData<T>.
DataMessengerRoot: DataMessengerRoot is the root of the data messenger tree. The root stores all kinds of forwardable data and provides them to the descendants.
DataNotifier<T>: A widget that passes value from a ValueListenable to its descendants. The data is refreshed when the ValueListenable changes.
DateInput: Reactive date input field with integrated date picker and text editing.
DatePicker
DatePickerController
DatePickerDialog: A date picker dialog that provides comprehensive date selection capabilities.
DatePickerTheme: Theme configuration for DatePicker widget styling and behavior.
DateRangePicker
DateTimeRange
DebounceController: A controller to debounce or throttle a callback.
DebugCreator: A wrapper class for the Element that is the creator of a RenderObject.
DecoratedBox: A widget that paints a Decoration either before or after its child paints.
DecoratedBoxTransition: Animated version of a DecoratedBox that animates the different properties of its Decoration.
DecoratedSliver: A sliver widget that paints a Decoration either before or after its child paints.
Decoration: A description of a box decoration (a decoration applied to a Rect).
DecorationImage: An image for a box decoration.
DecorationImagePainter: The painter for a DecorationImage.
DecorationTween: An interpolation between two Decorations.
DecreaseSliderValue
DecreaseStarIntent
DefaultAssetBundle: A widget that determines the default asset bundle for its descendants.
DefaultPlatformMenuDelegate: The platform menu delegate that handles the built-in macOS platform menu generation using the 'flutter/menu' channel.
DefaultRefreshIndicator
DefaultSelectionStyle: The selection style to apply to descendant EditableText widgets which don't have an explicit style.
DefaultShadcnLocalizations
DefaultTextEditingShortcuts: A widget with the shortcuts used for the default text editing behavior.
DefaultTextHeightBehavior: The TextHeightBehavior that will apply to descendant Text and EditableText widgets which have not explicitly set Text.textHeightBehavior.
DefaultTextStyle: The text style to apply to descendant Text widgets which don't have an explicit style.
DefaultTextStyleTransition: Animated version of a DefaultTextStyle that animates the different properties of its TextStyle.
DefaultTransitionDelegate<T>: The default implementation of TransitionDelegate that the Navigator will use if its Navigator.transitionDelegate is not specified.
DefaultWidgetsLocalizations: US English localizations for the widgets library.
DeleteCharacterIntent: Deletes the character before or after the caret location, based on whether forward is true.
DeleteToLineBreakIntent: Deletes from the current caret location to the previous or next soft or hard line break, based on whether forward is true.
DeleteToNextWordBoundaryIntent: Deletes from the current caret location to the previous or next word boundary, based on whether forward is true.
DesktopEditableTextContextMenu
DesktopPointerScrollEvent
DesktopTextSelectionToolbarLayoutDelegate: Positions the toolbar at anchor if it fits, otherwise moves it so that it just fits fully on-screen.
DestructiveBadge
DestructiveButton
DestructiveButtonTheme
DevToolsDeepLinkProperty: Debugging message for DevTools deep links.
DiagnosticsNode: Defines diagnostics data for a value.
DialogOverlayCompleter<T>: Completer that manages the lifecycle of a dialog overlay.
DialogOverlayHandler: Overlay handler that manages dialog display using the navigation stack.
DialogRoute<T>: Custom route implementation for shadcn_flutter dialogs.
DirectionalCaretMovementIntent: A DirectionalTextEditingIntent that moves the caret or the selection to a new location.
DirectionalFocusAction: An Action that moves the focus to the focusable node in the direction configured by the associated DirectionalFocusIntent.direction.
DirectionalFocusIntent: An Intent that represents moving to the next focusable node in the given direction.
Directionality: A widget that determines the ambient directionality of text and text-direction-sensitive render objects.
DirectionalMenuFocusIntent
DirectionalSelectTreeNodeIntent
DirectionalTextEditingIntent: A text editing related Intent that performs an operation towards a given direction of the current caret location.
DisableWidgetInspectorScope: Disables the Flutter DevTools Widget Inspector for a Widget subtree.
DismissAction: An Action that dismisses the focused widget.
Dismissible: A widget that can be dismissed by dragging in the indicated direction.
DismissIntent: An Intent that dismisses the currently focused widget.
DismissMenuAction: An action that closes all the menus associated with the given MenuController.
DismissUpdateDetails: Details for DismissUpdateCallback.
DisplayFeatureSubScreen: Positions child such that it avoids overlapping any DisplayFeature that splits the screen into sub-screens.
DisposableBuildContext<T extends State<StatefulWidget>>: Provides non-leaking access to a BuildContext.
Divider: A horizontal line widget used to visually separate content sections.
DividerPainter
DividerProperties
DividerTheme: Theme data for customizing Divider widget appearance.
DoNothingAction: An Action that doesn't perform any action when invoked.
DoNothingAndStopPropagationIntent: An Intent that is bound to a DoNothingAction, but, in addition to not performing an action, also stops the propagation of the key event bound to this intent to other key event handlers in the focus chain.
DoNothingAndStopPropagationTextIntent: An Intent to send the event straight to the engine.
DoNothingIntent: An Intent that is bound to a DoNothingAction.
DotIndicator: Navigation indicator with customizable dots showing current position in a sequence.
DotIndicatorTheme: Theme configuration for DotIndicator and its dot items.
DotItem
DottedBorder: Add a dotted border around any child widget. The strokeWidth property defines the width of the dashed border and color determines the stroke paint color. CircularIntervalList is populated with the dashPattern to render the appropriate pattern. The radius property is taken into account only if the borderType is BorderType.RRect. A customPath can be passed in as a parameter if you want to draw a custom shaped border.
DragBoundary: Provides a DragBoundaryDelegate for its descendants whose bounds are those defined by this widget.
DragBoundaryDelegate<T>: The interface for defining the algorithm for a boundary that a specified shape is dragged within.
DragDownDetails: Details object for callbacks that use GestureDragDownCallback.
DragEndDetails: Details object for callbacks that use GestureDragEndCallback.
Draggable<T extends Object>: A widget that can be dragged from to a DragTarget.
DraggableDetails: Represents the details when a specific pointer event occurred on the Draggable.
DraggableScrollableActuator: A widget that can notify a descendent DraggableScrollableSheet that it should reset its position to the initial state.
DraggableScrollableController: Controls a DraggableScrollableSheet.
DraggableScrollableNotification: A Notification related to the extent, which is the size, and scroll offset, which is the position of the child list, of the DraggableScrollableSheet.
DraggableScrollableSheet: A container for a Scrollable that responds to drag gestures by resizing the scrollable until a limit is reached, and then scrolling.
DragScrollActivity: The activity a scroll view performs when the user drags their finger across the screen.
DragStartDetails: Details object for callbacks that use GestureDragStartCallback.
DragTarget<T extends Object>: A widget that receives data when a Draggable widget is dropped.
DragTargetDetails<T>: Represents the details when a pointer event occurred on the DragTarget.
DragUpdateDetails: Details object for callbacks that use GestureDragUpdateCallback.
DrawerEntryWidget<T>
DrawerEntryWidgetState<T>
DrawerLayerData
DrawerOverlay
DrawerOverlayCompleter<T>
DrawerOverlayEntry<T>
DrawerOverlayState
DrawerSwiperHandler: Drawer-style swiper handler with backdrop transformation.
DrawerTheme: Theme configuration for drawer and sheet overlays.
DrawerWrapper
DrivenScrollActivity: An activity that drives a scroll view through a given animation.
DropdownMenu
DropdownMenuData
DropdownMenuTheme: Theme for DropdownMenu.
DualTransitionBuilder: A transition builder that animates its child based on the AnimationStatus of the provided animation.
DurationInput: Reactive duration input field with formatted text editing and validation.
DurationPicker
DurationPickerController
DurationPickerDialog
EdgeBlur: Defines the blur effect to be applied on a specific edge.
EdgeDraggingAutoScroller: An auto scroller that scrolls the scrollable if a drag gesture drags close to its edge.
EdgeInsets: An immutable set of offsets in each of the four cardinal directions.
EdgeInsetsDirectional: An immutable set of offsets in each of the four cardinal directions, but whose horizontal components are dependent on the writing direction.
EdgeInsetsGeometry: Base class for EdgeInsets that allows for text-direction aware resolution.
EdgeInsetsGeometryTween: An interpolation between two EdgeInsetsGeometrys.
EdgeInsetsTween: An interpolation between two EdgeInsetss.
EditablePart
EditableText: A basic text input field.
EditableTextState: State for an EditableText.
EditableTextTapOutsideIntent: An Intent that represents a tap outside the field.
EditableTextTapUpOutsideIntent: An Intent that represents a tap outside the field.
Effect<T>: An empty effect that all other effects extend. It can be added to Animate, but has no visual effect.
EffectEntry: Because Effect classes are immutable and may be reused between multiple Animate (or AnimateList) instances, an EffectEntry is created to store values that may be different between instances. For example, due to an interval on AnimateList, or from inheriting timing parameters.
EffectList: Simple helper class to build a list of effects via the chained api. Example:
ElasticInCurve: An oscillating curve that grows in magnitude while overshooting its bounds.
ElasticInOutCurve: An oscillating curve that grows and then shrinks in magnitude while overshooting its bounds.
ElasticOutCurve: An oscillating curve that shrinks in magnitude while overshooting its bounds.
Element: An instantiation of a Widget at a particular location in the tree.
ElevationEffect: An effect that animates a Material elevation shadow between begin and end (via PhysicalModel). You can also specify a shadow color and borderRadius to add rounded corners. It defaults to begin=0, end=8.
EmailValidator
EmptySelectItem
EmptyTextSelectionControls: Text selection controls that do not show any toolbars or handles.
EnableWidgetInspectorScope: Enables the Flutter DevTools Widget Inspector for a Widget subtree.
ErrorDescription: An explanation of the problem and its cause, any information that may help track down the problem, background information, etc.
ErrorHint: An ErrorHint provides specific, non-obvious advice that may be applicable.
ErrorSummary: A short (one line) description of the problem that was detected.
ErrorWidget: A widget that renders an exception's message.
ExactAssetImage: Fetches an image from an AssetBundle, associating it with the given scale.
ExcludeFocus: A widget that controls whether or not the descendants of this widget are focusable.
ExcludeFocusTraversal: A widget that controls whether or not the descendants of this widget are traversable.
ExcludeSemantics: A widget that drops all the semantics of its descendants.
Expanded: A widget that expands a child of a Row, Column, or Flex so that the child fills the available space.
ExpandSelectionToDocumentBoundaryIntent: Expands the current selection to the document boundary in the direction given by forward.
ExpandSelectionToLineBreakIntent: Expands the current selection to the closest line break in the direction given by forward.
ExpandTreeNodeIntent
Expansible: A StatefulWidget that expands and collapses.
ExpansibleController: A controller for managing the expansion state of an Expansible.
ExtendSelectionByCharacterIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next character boundary.
ExtendSelectionByPageIntent: Scrolls up or down by page depending on the forward parameter. Extends the selection up or down by page based on the forward parameter.
ExtendSelectionToDocumentBoundaryIntent: Extends, or moves the current selection from the current TextSelection.extent position to the start or the end of the document.
ExtendSelectionToLineBreakIntent: Extends, or moves the current selection from the current TextSelection.extent position to the closest line break in the direction given by forward.
ExtendSelectionToNextParagraphBoundaryIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next paragraph boundary.
ExtendSelectionToNextParagraphBoundaryOrCaretLocationIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next paragraph boundary depending on the forward parameter.
ExtendSelectionToNextWordBoundaryIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next word boundary.
ExtendSelectionToNextWordBoundaryOrCaretLocationIntent: Extends, or moves the current selection from the current TextSelection.extent position to the previous or the next word boundary, or the TextSelection.base position if it's closer in the move direction.
ExtendSelectionVerticallyToAdjacentLineIntent: Extends, or moves the current selection from the current TextSelection.extent position to the closest position on the adjacent line.
ExtendSelectionVerticallyToAdjacentPageIntent: Expands, or moves the current selection from the current TextSelection.extent position to the closest position on the adjacent page.
FadeEffect: Animates the opacity of the target between the specified begin and end values (via FadeTransition). It defaults to begin=0, end=1.
FadeInImage: An image that shows a placeholder image while the target image is loading, then fades in the new image when it loads.
FadeTransition: Animates the opacity of a widget.
FadingCarouselTransition: A fading carousel transition.
FaIcon: Creates an Icon Widget that works for non-material Icons, such as the Font Awesome Icons.
Feedback: Provides platform-specific acoustic and/or haptic feedback for certain actions.
FileImage: Decodes the given File object as an image, associating it with the given scale.
FittedBox: Scales and positions its child within itself according to fit.
FittedSizes: The pair of sizes returned by applyBoxFit.
FixedButtonTheme
FixedColumnWidth: Sizes the column to a specific number of pixels.
FixedExtentMetrics: Metrics for a ScrollPosition to a scroll view with fixed item sizes.
FixedExtentScrollController: A controller for scroll views whose items have the same size.
FixedExtentScrollPhysics: A snapping physics that always lands directly on items instead of anywhere within the scroll extent.
FixedScrollMetrics: An immutable snapshot of values associated with a Scrollable viewport.
FixedTableSize
FixedTooltipOverlayHandler
Flex: A widget that displays its children in a one-dimensional array.
FlexColumnWidth: Sizes the column by taking a part of the remaining space once all the other columns have been laid out.
Flexible: A widget that controls how a child of a Row, Column, or Flex flexes.
FlexibleResizablePaneController
FlexTableSize
FlipEffect: An effect that animates a 2.5D card flip rotation effect (via Transform). The effect can be horizontal or vertical.
FlippedCurve: A curve that is the reversed inversion of its given curve.
FlippedTweenSequence: Enables creating a flipped Animation whose value is defined by a sequence of Tweens.
Flow: A widget that sizes and positions children efficiently, according to the logic in a FlowDelegate.
FlowDelegate: A delegate that controls the appearance of a flow layout.
FlowPaintingContext: A context in which a FlowDelegate paints.
FlutterErrorDetails: Class for information provided to FlutterExceptionHandler callbacks.
FlutterLogo: The Flutter logo, in widget form. This widget respects the IconTheme. For guidelines on using the Flutter logo, visit https://flutter.dev/brand.
FlutterLogoDecoration: An immutable description of how to paint Flutter's logo.
Focus: A widget that manages a FocusNode to allow keyboard focus to be given to this widget and its descendants.
FocusableActionDetector: A widget that combines the functionality of Actions, Shortcuts, MouseRegion and a Focus widget to create a detector that defines actions and key bindings, and provides callbacks for handling focus and hover highlights.
FocusAttachment: An attachment point for a FocusNode.
FocusManager: Manages the focus tree.
FocusNode: An object that can be used by a stateful widget to obtain the keyboard focus and to handle keyboard events.
FocusOrder: Base class for all sort orders for OrderedTraversalPolicy traversal.
FocusOutline
FocusOutlineTheme
FocusScope: A FocusScope is similar to a Focus, but also serves as a scope for its descendants, restricting focus traversal to the scoped controls.
FocusScopeNode: A subclass of FocusNode that acts as a scope for its descendants, maintaining information about which descendant is currently or was last focused.
FocusTraversalGroup: A widget that describes the inherited focus policy for focus traversal for its descendants, grouping them into a separate traversal group.
FocusTraversalOrder: An inherited widget that describes the order in which its child subtree should be traversed.
FocusTraversalPolicy: Determines how focusable widgets are traversed within a FocusTraversalGroup.
FollowPathEffect: An effect that moves the target following the specified path (via Transform). The path coordinates are relative to the target's nominal position.
FontAwesomeIcons: Icons based on font awesome 7.0.0
FontFeature: A feature tag and value that affect the selection of glyphs in a font.
FontVariation: An axis tag and value that can be used to customize variable fonts.
FontWeight: The thickness of the glyphs used to draw the text.
ForcePressDetails: Details object for callbacks that use GestureForcePressStartCallback, GestureForcePressPeakCallback, GestureForcePressEndCallback or GestureForcePressUpdateCallback.
Form: A widget that provides form management capabilities for collecting and validating user input.
FormattedInput: A controlled input widget for structured data entry with formatting.
FormattedInputController: A controller for managing FormattedInput values programmatically.
FormattedInputData
FormattedInputTheme
FormattedObjectInput<T>
FormattedValue
FormattedValuePart
FormController: Controller for managing form state, validation, and submission.
FormEntry<T>
FormEntryErrorBuilder
FormEntryInterceptor<T>
FormEntryState
FormErrorBuilder
FormField<T>
FormFieldState<T>: The current state of a FormField. Passed to the FormFieldBuilder method for use in constructing the form field's widget.
FormInline<T>
FormKey<T>
FormPendingBuilder
FormState
FormTableLayout
FormValidityNotification
FormValueState<T>
ForwardableData<T>: A widget that holds the data that can be attached to ancestor holders.
ForwardableDataState<T>
FractionallySizedBox: A widget that sizes its child to a fraction of the total available space. For more details about the layout algorithm, see RenderFractionallySizedOverflowBox.
FractionalOffset: An offset that's expressed as a fraction of a Size.
FractionalOffsetTween: An interpolation between two fractional offsets.
FractionalTranslation: Applies a translation transformation before painting its child.
FractionColumnWidth: Sizes the column to a fraction of the table's constraints' maxWidth.
FrozenTableData
FullScreenDialogOverlayHandler: Full-screen variant of the dialog overlay handler.
FutureBuilder<T>: A widget that builds itself based on the latest snapshot of interaction with a Future.
FutureOnce<T>
FutureOnceState<T>
FutureOrBuilder<T>
FutureWidgetBuilder<T>: A widget that builds itself based on the latest snapshot of interaction with
Gap: A widget that takes a fixed amount of space in the direction of its parent.
GestureDetector: A widget that detects gestures.
GestureRecognizerFactory<T extends GestureRecognizer>: Factory for creating gesture recognizers.
GestureRecognizerFactoryWithHandlers<T extends GestureRecognizer>: Factory for creating gesture recognizers that delegates to callbacks.
GhostButton
GhostButtonTheme
GlobalKey<T extends State<StatefulWidget>>: A key that is unique across the entire app.
GlobalObjectKey<T extends State<StatefulWidget>>: A global key that takes its identity from the object used as its value.
GlowingOverscrollIndicator: A visual indication that a scroll view has overscrolled.
GlyphInfo: The measurements of a character (or a sequence of visually connected characters) within a paragraph.
Gradient: A 2D gradient.
GradientRotation: A GradientTransform that rotates the gradient around the center-point of its bounding box.
GradientTransform: Base class for transforming gradient shaders without applying the same transform to the entire canvas.
GridItemPickerLayout
GridPaper: A widget that draws a rectilinear grid of lines one pixel wide.
Grids
GridView: A scrollable, 2D array of widgets.
Haptics: A class that exposes the haptic feedback functionality.
Hero: A widget that marks its child as being a candidate for hero animations.
HeroController: A Navigator observer that manages Hero transitions.
HeroControllerScope: An inherited widget to host a hero controller.
HeroMode: Enables or disables Heroes in the widget subtree.
HoldScrollActivity: A scroll activity that does nothing but can be released to resume normal idle behavior.
Hook<R>: Hook is similar to a StatelessWidget, but is not associated to an Element.
HookBuilder: A HookWidget that delegates its build to a callback.
HookState<R, T extends Hook<R>>: The logic and internal state for a HookWidget
HookWidget: A Widget that can use a Hook.
HorizontalResizableDragger: A Horizontal dragger that can be used as a divider between resizable panes.
HoverCard: A widget that displays a popover when hovered or long-pressed.
HoverCardTheme: Theme configuration for hover card behavior and appearance.
HSLColor: A color represented using alpha, hue, saturation, and lightness.
HSLColorPickerArea
HSLColorPickerPainter
HSVColor: A color represented using alpha, hue, saturation, and value.
HSVColorPickerArea
HSVColorPickerPainter
HtmlElementView: Embeds an HTML element in the Widget hierarchy in Flutter web.
Icon: A graphical icon widget drawn with a glyph from a font described in an IconData such as material's predefined IconDatas in Icons.
IconData: A description of an icon fulfilled by a font glyph.
IconDataBrands: IconData for a font awesome brand icon from a code point
IconDataDuotone: IconData for a font awesome duotone icon from a code point. Only works if duotone icons (font awesome pro) have been installed.
IconDataLight: IconData for a font awesome light icon from a code point. Only works if light icons (font awesome pro) have been installed.
IconDataProperty: DiagnosticsProperty that has an IconData as value.
IconDataRegular: IconData for a font awesome regular icon from a code point
IconDataSharpLight: IconData for a font awesome sharp light icon from a code point. Only works if thin icons (font awesome pro, v6+) have been installed.
IconDataSharpRegular: IconData for a font awesome sharp regular icon from a code point. Only works if thin icons (font awesome pro, v6+) have been installed.
IconDataSharpSolid: IconData for a font awesome sharp solid icon from a code point. Only works if thin icons (font awesome pro, v6+) have been installed.
IconDataSharpThin: IconData for a font awesome sharp thin icon from a code point. Only works if thin icons (font awesome pro, v6+) have been installed.
IconDataSolid: IconData for a font awesome solid icon from a code point
IconDataThin: IconData for a font awesome thin icon from a code point. Only works if thin icons (font awesome pro, v6+) have been installed.
IconTheme: Controls the default properties of icons in a widget subtree.
IconThemeData: Defines the size, font variations, color, opacity, and shadows of icons.
IconThemeDataTween
IconThemeProperties
IdleScrollActivity: A scroll activity that does nothing.
IgnoreBaseline: A widget that causes the parent to ignore the child for the purposes of baseline alignment.
IgnoreForm<T>: A widget that prevents form components from submitting their values to form controllers.
IgnorePointer: A widget that is invisible during hit testing.
Image: A widget that displays an image.
ImageCache: Class for caching images.
ImageCacheStatus: Information about how the ImageCache is tracking an image.
ImageChunkEvent: An immutable notification of image bytes that have been incrementally loaded.
ImageConfiguration: Configuration information passed to the ImageProvider.resolve method to select a specific image.
ImageFiltered: Applies an ImageFilter to its child.
ImageIcon: An icon that comes from an ImageProvider, e.g. an AssetImage.
ImageInfo: A dart:ui.Image object with its corresponding scale.
ImageInput
ImageProperties
ImageProvider<T extends Object>: Identifies an image without committing to the precise final asset. This allows a set of images to be identified and for the precise image to later be resolved based on the environment, e.g. the device pixel ratio.
ImageShader: A shader (as used by Paint.shader) that tiles an image.
ImageSizeInfo: Tracks the bytes used by a dart:ui.Image compared to the bytes needed to paint that image without scaling it.
ImageStream: A handle to an image resource.
ImageStreamCompleter: Base class for those that manage the loading of dart:ui.Image objects for ImageStreams.
ImageStreamCompleterHandle: An opaque handle that keeps an ImageStreamCompleter alive even if it has lost its last listener.
ImageStreamListener: Interface for receiving notifications about the loading of an image.
ImageTools: A widget providing image editing and manipulation tools.
ImplicitlyAnimatedWidget: An abstract class for building widgets that animate changes to their properties.
ImplicitlyAnimatedWidgetState<T extends ImplicitlyAnimatedWidget>: A base class for the State of widgets with implicit animations.
InactiveDotItem
IncreaseSliderValue
IncreaseStarIntent
IndentGuideLine
IndentGuideNone
IndentGuidePath
IndexedSemantics: A widget that annotates the child semantics with an index.
IndexedSlot<T extends Element?>: A value for Element.slot used for children of MultiChildRenderObjectElements.
IndexedStack: A Stack that shows a single child from a list of children.
InheritedDataHolder<T>: An InheritedWidget that passes the DataHolder to its descendants.
InheritedDataHolderWidget<T>: An abstract InheritedWidget that passes the DataHolder to its descendants.
InheritedElement: An Element that uses an InheritedWidget as its configuration.
InheritedModel<T>: An InheritedWidget that's intended to be used as the base class for models whose dependents may only depend on one part or "aspect" of the overall model.
InheritedModelElement<T>: An Element that uses a InheritedModel as its configuration.
InheritedNotifier<T extends Listenable>: An inherited widget for a Listenable notifier, which updates its dependencies when the notifier is triggered.
InheritedRootDataHolder: An InheritedWidget that passes the root DataHolder to its descendants.
InheritedTheme: An InheritedWidget that defines visual properties like colors and text styles, which the child's subtree depends on.
InheritedWidget: Base class for widgets that efficiently propagate information down the tree.
InlineSpan: An immutable span of inline content which forms part of a paragraph.
InlineSpanSemanticsInformation: The textual and semantic label information for an InlineSpan.
InputAutoCompleteFeature
InputClearFeature
InputCopyFeature
InputFeature
InputFeatureState<T extends InputFeature>
InputFeatureVisibility
InputHintFeature
InputLeadingFeature
InputOTP: A specialized input widget for One-Time Password (OTP) and verification code entry.
InputOTPChild
InputOTPChildData
InputOTPTheme: Theme data for customizing InputOTP widget appearance.
InputPart
InputPasswordToggleFeature
InputPasteFeature
InputRevalidateFeature
InputShowHintIntent
InputSpinnerFeature
InputTrailingFeature
InspectorButton: An abstract base class for creating Material or Cupertino-styled inspector buttons.
InspectorReferenceData: Structure to help reference count Dart objects referenced by a GUI tool using WidgetInspectorService.
InspectorSelection: Mutable selection state of the inspector.
InspectorSerializationDelegate: A delegate that configures how a hierarchy of DiagnosticsNodes are serialized by the Flutter Inspector.
InstantTooltip
Intent: An abstract class representing a particular configuration of an Action.
InteractiveViewer: A widget that enables pan and zoom interactions with its child.
Interval: A curve that is 0.0 until begin, then curved (according to curve) from 0.0 at begin to 1.0 at end, then remains 1.0 past end.
IntervalDuration: A custom curve that creates time-based intervals within an animation duration.
IntrinsicColumnWidth: Sizes the column according to the intrinsic dimensions of all the cells in that column.
IntrinsicHeight: A widget that sizes its child to the child's intrinsic height.
IntrinsicTableSize
IntrinsicWidth: A widget that sizes its child to the child's maximum intrinsic width.
IntTween: An interpolation between two integers that rounds.
InvalidResult
IOSSystemContextMenuItem: Describes a context menu button that will be rendered in the iOS system context menu and not by Flutter itself.
IOSSystemContextMenuItemCopy: Creates an instance of IOSSystemContextMenuItem for the system's built-in copy button.
IOSSystemContextMenuItemCut: Creates an instance of IOSSystemContextMenuItem for the system's built-in cut button.
IOSSystemContextMenuItemLiveText: Creates an instance of IOSSystemContextMenuItem for the system's built-in Live Text button.
IOSSystemContextMenuItemLookUp: Creates an instance of IOSSystemContextMenuItem for the system's built-in look up button.
IOSSystemContextMenuItemPaste: Creates an instance of IOSSystemContextMenuItem for the system's built-in paste button.
IOSSystemContextMenuItemSearchWeb: Creates an instance of IOSSystemContextMenuItem for the system's built-in search web button.
IOSSystemContextMenuItemSelectAll: Creates an instance of IOSSystemContextMenuItem for the system's built-in select all button.
IOSSystemContextMenuItemShare: Creates an instance of IOSSystemContextMenuItem for the system's built-in share button.
ItemBuilder<T>
ItemChildDelegate<T>
ItemList<T>
ItemPicker<T>: A widget for selecting items from a collection using various presentation modes.
ItemPickerData
ItemPickerDialog<T>
ItemPickerLayout
ItemPickerOption<T>
KeepAlive: Mark a child as needing to stay alive even when it's in a lazy list that would otherwise remove it.
KeepAliveHandle: A Listenable which can be manually triggered.
KeepAliveNotification: Indicates that the subtree through which this notification bubbles must be kept alive even if it would normally be discarded as an optimization.
Key: A Key is an identifier for Widgets, Elements and SemanticsNodes.
KeyboardDisplay: A widget that displays keyboard shortcuts in a visually appealing format.
KeyboardInsertedContent: A class representing rich content (such as a PNG image) inserted via the system input method.
KeyboardKeyDisplay: A widget that displays a single keyboard key in a styled format.
KeyboardListener: A widget that calls a callback whenever the user presses or releases a key on a keyboard.
KeyboardShortcutDisplayHandle
KeyboardShortcutDisplayMapper
KeyboardShortcutTheme: Theme for keyboard shortcut displays.
KeyedSubtree: A widget that builds its child.
KeyedTabChildWidget<T>
KeyedTabItem<T>
KeyEvent: Defines the interface for keyboard key events.
Keyframe<T>
KeySet<T extends KeyboardKey>: A set of KeyboardKeys that can be used as the keys in a Map.
Label
LabeledGlobalKey<T extends State<StatefulWidget>>: A global key with a debugging label.
LayerLink: An object that a LeaderLayer can register with.
LayoutBuilder: Builds a widget tree that can depend on the parent widget's size.
LayoutChangedNotification: Indicates that the layout of one of the descendants of the object receiving this notification has changed in some way, and that therefore any assumptions about that layout are no longer valid.
LayoutId: Metadata for identifying children in a CustomMultiChildLayout.
LeafRenderObjectElement: An Element that uses a LeafRenderObjectWidget as its configuration.
LeafRenderObjectWidget: A superclass for RenderObjectWidgets that configure RenderObject subclasses that have no children.
LegacyColorSchemes
LengthValidator
LexicalFocusOrder: Can be given to a FocusTraversalOrder widget to use a String to assign a lexical order to a widget subtree that is using a OrderedTraversalPolicy to define the order in which widgets should be traversed with the keyboard.
LimitedBox: A box that limits its size only when it's unconstrained.
LinearBorder: An OutlinedBorder like BoxBorder that allows one to define a rectangular (box) border in terms of zero to four LinearBorderEdges, each of which is rendered as a single line.
LinearBorderEdge: Defines the relative size and alignment of one LinearBorder edge.
LinearGradient: A 2D linear gradient.
LinearProgressIndicator: A sophisticated linear progress indicator with advanced visual effects.
LinearProgressIndicatorTheme: Theme configuration for LinearProgressIndicator components.
LineMetrics: LineMetrics stores the measurements and statistics of a single line in the paragraph.
LinkButton
LinkButtonTheme
ListBody: A widget that arranges its children sequentially along a given axis, forcing them to the dimension of the parent in the other axis.
ListChange<T>
ListChangeDetails<T>: A list change details containing the added, removed, and index of the changes.
ListChanges<T>
Listenable: An object that maintains a list of listeners.
ListenableBuilder: A general-purpose widget for building a widget subtree when a Listenable changes.
ListenEffect: An effect that calls a callback function with its current animation value between begin and end.
Listener: A widget that calls callbacks in response to common pointer events.
ListInsertChange<T>
ListItemPickerLayout
ListListenable<T>: A list that can be listened to for changes.
ListNotifier<T>: A list that can be listened to for changes and notifies listeners when the list changes.
ListRemoveChange<T>
ListSwapChange<T>
ListView: A scrollable list of widgets arranged linearly.
ListWheelChildBuilderDelegate: A delegate that supplies children for ListWheelScrollView using a builder callback.
ListWheelChildDelegate: A delegate that supplies children for ListWheelScrollView.
ListWheelChildListDelegate: A delegate that supplies children for ListWheelScrollView using an explicit list.
ListWheelChildLoopingListDelegate: A delegate that supplies infinite children for ListWheelScrollView by looping an explicit list.
ListWheelElement: Element that supports building children lazily for ListWheelViewport.
ListWheelScrollView: A box in which children on a wheel can be scrolled.
ListWheelViewport: A viewport showing a subset of children on a wheel.
LiveTextInputStatusNotifier: A ValueNotifier whose value indicates whether the current device supports the Live Text (OCR) function.
Locale: An identifier used to select a user's language and formatting preferences.
LocalHistoryEntry: An entry in the history of a LocalHistoryRoute.
Localizations: Defines the Locale for its child and the localized resources that the child depends on.
LocalizationsDelegate<T>: A factory for a set of localized resources of type T, to be loaded by a Localizations widget.
LocalizationsResolver: A helper class used to manage localization resolution.
LocalKey: A key that is not a GlobalKey.
LogicalKeySet: A set of LogicalKeyboardKeys that can be used as the keys in a map.
LongPressDraggable<T extends Object>: Makes its child draggable starting from long press.
LongPressEndDetails: Details for callbacks that use GestureLongPressEndCallback.
LongPressMoveUpdateDetails: Details for callbacks that use GestureLongPressMoveUpdateCallback.
LongPressStartDetails: Details for callbacks that use GestureLongPressStartCallback.
LookupBoundary: A lookup boundary controls what entities are visible to descendants of the boundary via the static lookup methods provided by the boundary.
LucideIcons
MagnifierController: A controller for a magnifier.
MagnifierDecoration: The decorations to put around the loupe in a RawMagnifier.
MagnifierInfo: A data class that contains the geometry information of text layouts and selection gestures, used to position magnifiers.
MapChangeDetails<K, V>: A map change details containing the added and removed entries.
MapListenable<K, V>: A map that can be listened to for changes.
MapNotifier<K, V>: A map that can be listened to for changes and notifies listeners when the map changes.
MappedValueNotifier<T, R>: A ValueListenable that maps the value of another ValueListenable.
MaskFilter: A mask filter to apply to shapes as they are painted. A mask filter is a function that takes a bitmap of color pixels, and returns another bitmap of color pixels.
MaterialPage<T>: A page that creates a material style PageRoute.
MaterialPageRoute<T>: A modal route that replaces the entire screen with a platform-adaptive transition.
Matrix4: 4D Matrix. Values are stored in column major order.
Matrix4Tween: An interpolation between two Matrix4s.
MatrixTransition: Animates the Matrix4 of a transformed widget.
MatrixUtils: Utility functions for working with matrices.
MaxColumnWidth: Sizes the column such that it is the size that is the maximum of two column width specifications.
MaxGap: A widget that takes, at most, an amount of space in a Row, Column, or Flex widget.
MaxValidator<T extends num>
MediaQuery: Establishes a subtree in which media queries resolve to the given data.
MediaQueryData: Information about a piece of media (e.g., a window).
MediaQueryVisibility
MediaQueryVisibilityTheme: Theme configuration for MediaQueryVisibility.
MemoryImage: Decodes the given Uint8List buffer as an image, associating it with the given scale.
Menubar: A horizontal menubar widget for displaying application menus and menu items.
MenubarButtonTheme
MenubarState
MenubarTheme: Theme configuration for Menubar appearance and layout.
MenuButton
MenuButtonTheme
MenuCheckbox
MenuController: A controller used to manage a menu created by a subclass of RawMenuAnchor, such as MenuAnchor, MenuBar, SubmenuButton.
MenuData
MenuDivider
MenuGap
MenuGroup
MenuGroupData
MenuItem
MenuLabel
MenuOverlayHandler
MenuPopup
MenuPopupTheme: A theme for MenuPopup.
MenuRadio<T>
MenuRadioGroup<T>
MenuShortcut
MenuTheme: Styling options for menu widgets such as MenuGroup and MenuButton.
MergeSemantics: A widget that merges the semantics of its descendants.
MetaData: Holds opaque meta data in the render tree.
MetaSEO: Make it as interface to implement later on only Web platform
MinColumnWidth: Sizes the column such that it is the size that is the minimum of two column width specifications.
MiniColorPickerSet
MinValidator<T extends num>
MobileEditableTextContextMenu
ModalBackdrop: A visual backdrop widget that creates modal-style overlays.
ModalBackdropTheme: Theme configuration for modal backdrop appearance and behavior.
ModalBarrier: A widget that prevents the user from interacting with widgets behind itself.
ModalContainer: A container widget that provides consistent styling for modal content.
ModalRoute<T>: A route that blocks interaction with previous routes.
Model<T>: A widget that provides the model to its descendants.
ModelBoundary<T>: A widget that stops the property of the given type from being passed to its descendants.
ModelBuilder<T>: A widget that uses the model to build a widget.
ModelKey<T>: A ModelKey that holds the data key and provides methods to find and change the data.
ModelListenable<T>: A widget that provides the model to its descendants and listens to the data changes. The data is refreshed when the ValueListenable changes. The model is read-only.
ModelNotifier<T>: A widget that provides the model to its descendants and listens to the data changes. The data is refreshed when the ValueNotifier changes.
MonthCalendar
MoreDots
MouseCursor: An interface for mouse cursor definitions.
MouseRegion: A widget that tracks the movement of mice.
MoveEffect: An effect that moves the target between the specified begin and end offsets (via Transform.translate). Defaults to begin=Offset(0, -16), end=Offset.zero. transformHitTests is simply passed on to Transform.translate.
MultiCalendarValue
MultiChildLayoutDelegate: A delegate that controls the layout of multiple children.
MultiChildRenderObjectElement: An Element that uses a MultiChildRenderObjectWidget as its configuration.
MultiChildRenderObjectWidget: A superclass for RenderObjectWidgets that configure RenderObject subclasses that have a single list of children. (This superclass only provides the storage for that child list, it doesn't actually provide the updating logic.)
MultiData: A widget that provides multiple data to its descendants.
MultiDataItem: An internal interface that provides dataType and wrap method.
MultiFrameImageStreamCompleter: Manages the decoding and scheduling of image frames.
MultiModel: A widget that provides multiple models to its descendants.
MultipleAnswer<T>
MultipleAnswerController<T>: A controller for managing ControlledMultipleAnswer selections programmatically.
MultipleChoice<T>
MultipleChoiceController<T>: A controller for managing ControlledMultipleChoice selection programmatically.
MultipleChoiceTheme: Theme data for MultipleChoice and MultipleAnswer.
Multiplexer<O>
MultiSelect<T>
MultiSelectableSelectionContainerDelegate: A delegate that handles events and updates for multiple Selectable children.
MultiSelectChip: Chip widget designed for multi-select contexts with automatic removal functionality.
MultiSelectController<T>: Controller for managing ControlledMultiSelect state programmatically.
MutableNotifier<T>: A notifier class that allows mutable updates and notifies listeners of changes.
MutablePylon<T>: A stateful widget that provides mutable state management functionality.
MutablePylonState<T>: The state for a MutablePylon widget.
MutedButtonTheme
NavigateSuggestionIntent: Intent for navigating through autocomplete suggestions via keyboard.
NavigationBar: A flexible navigation container widget for organizing navigation items.
NavigationBarItem
NavigationBarTheme: Theme data for customizing NavigationBar widget appearance.
NavigationButton
NavigationChildControlData
NavigationControlData
NavigationDivider
NavigationGap
NavigationItem
NavigationLabel
NavigationMenu: A horizontal navigation menu with dropdown content support.
NavigationMenuContent: A content item displayed within a navigation menu popover.
NavigationMenuContentList: A grid layout container for organizing navigation menu content items.
NavigationMenuItem: An individual menu item within a NavigationMenu.
NavigationMenuItemState
NavigationMenuState
NavigationMenuTheme: Theme configuration for NavigationMenu components.
NavigationNotification: A notification that a change in navigation has taken place.
NavigationPadding
NavigationRail: A vertical or horizontal navigation rail component for sidebar navigation.
NavigationSidebar: A full-width navigation sidebar component for comprehensive navigation.
NavigationToolbar: NavigationToolbar is a layout helper to position 3 widgets or groups of widgets along a horizontal axis that's sensible for an application's navigation bar such as in Material Design and in iOS.
NavigationWidget
Navigator: A widget that manages a set of child widgets with a stack discipline.
NavigatorObserver: An interface for observing the behavior of a Navigator.
NavigatorPopHandler<T>: Enables the handling of system back gestures.
NavigatorState: The state for a Navigator widget.
NestedScrollView: A scrolling view inside of which can be nested other scrolling views, with their scroll positions being intrinsically linked.
NestedScrollViewState: The State for a NestedScrollView.
NestedScrollViewViewport: The Viewport variant used by NestedScrollView.
NetworkImage: Fetches the given URL from the network, associating it with the given scale.
NeverScrollableScrollPhysics: Scroll physics that does not allow the user to scroll.
NextFocusAction: An Action that moves the focus to the next focusable node in the focus order.
NextFocusIntent: An Intent bound to NextFocusAction, which moves the focus to the next focusable node in the focus traversal order.
NextItemIntent
NextMenuFocusIntent
NextSuggestionIntent
NonNullValidator<T>
NotchedShape: A shape with a notch in its outline.
NotEmptyValidator
Notification: A notification that can bubble up the widget tree.
NotificationListener<T extends Notification>: A widget that listens for Notifications bubbling up the tree.
NotValidator<T>
NullableDate
NullableTimeOfDay
NumberInput
NumberInputTheme
NumberTicker: A widget that smoothly animates between numeric values with customizable display.
NumberTickerTheme: Theme configuration for NumberTicker widgets.
NumericFocusOrder: Can be given to a FocusTraversalOrder widget to assign a numerical order to a widget subtree that is using a OrderedTraversalPolicy to define the order in which widgets should be traversed with the keyboard.
ObjectFormField<T>
ObjectFormFieldDialogResult<T>
ObjectFormFieldState<T>
ObjectFormHandler<T>
ObjectKey: A key that takes its identity from the object used as its value.
ObjectRef<T>: A class that stores a single value.
Offset: An immutable 2D floating-point offset.
Offstage: A widget that lays the child out as if it was in the tree, but without painting anything, without making the child available for hit testing, and without taking any room in the parent.
Oil
OneFrameImageStreamCompleter: Manages the loading of dart:ui.Image objects for static ImageStreams (those with only one frame).
Opacity: A widget that makes its child partially transparent.
OpenSubMenuIntent
OrderedTraversalPolicy: A FocusTraversalPolicy that orders nodes by an explicit order that resides in the nearest FocusTraversalOrder widget ancestor.
OrientationBuilder: Builds a widget tree that can depend on the parent widget's orientation (distinct from the device orientation).
OrValidator<T>
OTPSeparator
OutlineBadge
OutlineButton
OutlineButtonTheme
OutlinedBorder: A ShapeBorder that draws an outline with the width and color specified by side.
OutlinedContainer
OutlinedContainerTheme
OvalBorder: A border that fits an elliptical shape.
OverflowBar: A widget that lays out its children in a row unless they "overflow" the available horizontal space, in which case it lays them out in a column instead.
OverflowBox: A widget that imposes different constraints on its child than it gets from its parent, possibly allowing the child to overflow the parent.
OverflowMarquee: Automatically scrolling widget for content that overflows its container.
OverflowMarqueeTheme: Theme configuration for OverflowMarquee scrolling text displays.
Overlay: A stack of entries that can be managed independently.
OverlayBarrier
OverlayCompleter<T>
OverlayEntry: A place in an Overlay that can contain a widget.
OverlayHandler
OverlayManager
OverlayManagerAsTooltipOverlayHandler
OverlayManagerLayer
OverlayPopoverEntry<T>
OverlayPortal: A widget that renders its overlay child on an Overlay.
OverlayPortalController: A class to show, hide and bring to top an OverlayPortal's overlay child in the target Overlay.
OverlayPylonReference
OverlayRoute<T>: A route that displays widgets in the Navigator's Overlay.
OverlayState: The current state of an Overlay.
OverscrollIndicatorNotification: A notification that either a GlowingOverscrollIndicator or a StretchingOverscrollIndicator will start showing an overscroll indication.
OverscrollNotification: A notification that a Scrollable widget has not changed its scroll position because the change would have caused its scroll position to go outside of its scroll bounds.
Padding: A widget that insets its child by the given padding.
PaddingAll: A widget that adds padding to the top, bottom, left, and right of a child.
PaddingBottom: A widget that adds padding to the bottom of a child.
PaddingBottomLeft: A widget that adds padding to the bottom and left of a child.
PaddingBottomRight: A widget that adds padding to the bottom and right of a child.
PaddingHorizontal: A widget that adds padding to the left and right of a child.
PaddingLeft: A widget that adds padding to the left of a child.
PaddingRight: A widget that adds padding to the right of a child.
PaddingTop: A widget that adds padding to the top of a child.
PaddingTopLeft: A widget that adds padding to the top and left of a child.
PaddingTopRight: A widget that adds padding to the top and right of a child.
PaddingVertical: A widget that adds padding to the top and bottom of a child.
Page<T>: Describes the configuration of a Route.
PageController: A controller for PageView.
PageMetrics: Metrics for a PageView.
PageRoute<T>: A modal route that replaces the entire screen.
PageRouteBuilder<T>: A utility class for defining one-off page routes in terms of callbacks.
PageScrollPhysics: Scroll physics used by a PageView.
PageStorage: Establish a subtree in which widgets can opt into persisting states after being destroyed.
PageStorageBucket: A storage bucket associated with a page in an app.
PageStorageKey<T>: A Key that can be used to persist the widget state in storage after the destruction and will be restored when recreated.
PageView: A scrollable list that works page by page.
Pagination: A navigation widget for paginated content with comprehensive page controls.
PaginationTheme: Theme data for customizing Pagination widget appearance.
Paint: A description of the style to use when drawing on a Canvas.
PaintingContext: A place to paint.
PaintingEffect: An abstraction for skeleton painting effects consumed by the Skeletonizer.animationController
ParametricCurve<T>: An abstract class providing an interface for evaluating a parametric curve.
ParentDataElement<T extends ParentData>: An Element that uses a ParentDataWidget as its configuration.
ParentDataWidget<T extends ParentData>: Base class for widgets that hook ParentData information to children of RenderObjectWidgets.
PasteTextIntent: An Intent to paste text from Clipboard to the field.
Path: A complex, one-dimensional subset of a plane.
PerformanceOverlay: Displays performance statistics.
PhoneInput: A specialized input widget for entering international phone numbers.
PhoneInputTheme: Theme data for PhoneInput.
PhoneNumber
PhysicalModel: A widget representing a physical layer that clips its children to a shape.
PhysicalShape: A widget representing a physical layer that clips its children to a path.
PinnedHeaderSliver: A sliver that keeps its Widget child at the top of the a CustomScrollView.
Placeholder: A widget that draws a box that represents where other widgets will one day be added.
PlaceholderDimensions: Holds the Size and baseline required to represent the dimensions of a placeholder in text.
PlaceholderSpan: An immutable placeholder that is embedded inline within text.
Platform: Information about the environment in which the current program is running.
PlatformMenu: A class for representing menu items that have child submenus.
PlatformMenuBar: A menu bar that uses the platform's native APIs to construct and render a menu described by a PlatformMenu/PlatformMenuItem hierarchy.
PlatformMenuDelegate: An abstract delegate class that can be used to set WidgetsBinding.platformMenuDelegate to provide for managing platform menus.
PlatformMenuItem: A class for PlatformMenuItems that do not have submenus (as a PlatformMenu would), but can be selected.
PlatformMenuItemGroup: A class that groups other menu items into sections delineated by dividers.
PlatformProvidedMenuItem: A class that represents a menu item that is provided by the platform.
PlatformRouteInformationProvider: The route information provider that propagates the platform route information changes.
PlatformSelectableRegionContextMenu: A widget that provides native selection context menu for its child subtree.
PlatformViewCreationParams: The parameters used to create a PlatformViewController.
PlatformViewLink: Links a platform view with the Flutter framework.
PlatformViewSurface: Integrates a platform view with Flutter's compositor, touch, and semantics subsystems.
PointerCancelEvent: The input from the pointer is no longer directed towards this receiver.
PointerData
PointerDownEvent: The pointer has made contact with the device.
PointerEvent: Base class for touch, stylus, or mouse events.
PointerMoveEvent: The pointer has moved with respect to the device while the pointer is in contact with the device.
PointerUpEvent: The pointer has stopped making contact with the device.
PopEntry<T>: Allows listening to and preventing pops.
Popover: A comprehensive popover overlay system for displaying contextual content.
PopoverController: A controller for managing multiple popovers and their lifecycle.
PopoverLayout
PopoverLayoutRender
PopoverOverlayHandler
PopoverOverlayWidget
PopoverOverlayWidgetState
PopScope<T>: Manages back navigation gestures.
PopupRoute<T>: A modal route that overlays a widget over the current route.
Positioned: A widget that controls where a child of a Stack is positioned.
PositionedDirectional: A widget that controls where a child of a Stack is positioned without committing to a specific TextDirection.
PositionedTransition: Animated version of Positioned which takes a specific Animation<RelativeRect> to transition the child's position from a start position to an end position over the lifetime of the animation.
PrecisionStopwatch
PredictiveBackRoute: An interface for a route that supports predictive back gestures.
PreferredSize: A widget with a preferred size.
PreferredSizeWidget: An interface for widgets that can return the size this widget would prefer if it were otherwise unconstrained.
PreviousFocusAction: An Action that moves the focus to the previous focusable node in the focus order.
PreviousFocusIntent: An Intent bound to PreviousFocusAction, which moves the focus to the previous focusable node in the focus traversal order.
PreviousItemIntent
PreviousSuggestionIntent
PrimaryBadge: A primary style badge widget for highlighting important information or status.
PrimaryButton
PrimaryButtonTheme
PrimaryScrollController: Associates a ScrollController with a subtree.
PrioritizedAction: An Action that iterates through a list of Intents, invoking the first that is enabled.
PrioritizedIntents: An Intent that evaluates a series of specified orderedIntents for execution.
Progress: A linear progress indicator that visually represents task completion.
ProgressTheme: Theme configuration for Progress components.
ProxyAnimation: An animation that is a proxy for another animation.
ProxyElement: An Element that uses a ProxyWidget as its configuration.
ProxyWidget: A widget that has a child widget provided to it, instead of building a new widget.
PulseEffect: Creates a painting effect where a two colors are lerped back nad forward based on animation value
Pylon<T>: A widget that provides a value of type T to its descendants in the widget tree.
PylonCluster: A widget that combines multiple Pylon widgets into a single widget.
PylonCodec<T>
PylonFuture<T>: A widget that combines a FutureBuilder with a Pylon widget to handle asynchronous data loading.
PylonPort<T extends PylonCodec>: A widget that synchronizes a pylon value with URL query parameters.
PylonRemove<T>: A widget that nullifies a pylon value of type T from the widget tree.
PylonStream<T>: A widget that combines a StreamBuilder with a Pylon widget to provide reactive state management.
RadialGradient: A 2D radial gradient.
Radio: A radio button widget that displays a circular selection indicator.
RadioCard<T>
RadioCardTheme: Theme data for the RadioCard widget.
RadioGroup<T>
RadioGroupController<T>: Controller for managing ControlledRadioGroup state programmatically.
RadioGroupData<T>
RadioGroupRegistry<T>: An abstract interface for registering a group of radios.
RadioGroupState<T>
RadioItem<T>
RadioTheme: Theme data for customizing Radio widget appearance.
Radius: A radius for either circular or elliptical shapes.
RadixIcons
RangeCalendarValue
RangeMaintainingScrollPhysics: Scroll physics that attempt to keep the scroll position in range when the contents change dimensions suddenly.
RangeValidator<T extends num>
RawAutocomplete<T extends Object>: A widget for helping the user make a selection by entering some text and choosing from among a list of options.
RawCell
RawDialogRoute<T>: A general dialog route which allows for customization of the dialog popup.
RawGestureDetector: A widget that detects gestures described by the given gesture factories.
RawGestureDetectorState: State for a RawGestureDetector.
RawImage: A widget that displays a dart:ui.Image directly.
RawKeyboardListener: A widget that calls a callback whenever the user presses or releases a key on a keyboard.
RawKeyEvent: Defines the interface for raw key events.
RawMagnifier: A common base class for magnifiers.
RawMenuAnchor: A widget that wraps a child and anchors a floating menu.
RawMenuAnchorGroup: Creates a menu anchor that is always visible and is not displayed in an OverlayPortal.
RawMenuOverlayInfo: Anchor and menu information passed to RawMenuAnchor.
RawRadio<T>: A Radio button that provides basic radio functionalities.
RawScrollbar: An extendable base class for building scrollbars that fade in and out.
RawScrollbarState<T extends RawScrollbar>: The state for a RawScrollbar widget, also shared by the Scrollbar and CupertinoScrollbar widgets.
RawSortableItemPositioned
RawSortableList<T>
RawSortableParentData
RawSortableStack: RawSortableStack prevents the stacking children from going outside the bounds of this widget. It will clamp the position of the children to the bounds of this widget.
RawTableLayout
RawView: The lower level workhorse widget for View that bootstraps a render tree for a view.
ReadingOrderTraversalPolicy: Traverses the focus order in "reading order".
RecentColorsScope
RecentColorsScopeState
Rect: An immutable, 2D, axis-aligned, floating-point rectangle whose coordinates are relative to a given origin.
RectTween: An interpolation between two rectangles.
RedoTextIntent: An Intent that represents a user interaction that attempts to go back to the previous editing state.
RefreshTrigger: A widget that provides pull-to-refresh functionality.
RefreshTriggerPhysics
RefreshTriggerStage
RefreshTriggerState
RefreshTriggerTheme: Theme configuration for RefreshTrigger.
RegexValidator
RelativeKeyframe<T>
RelativePositionedTransition: Animated version of Positioned which transitions the child's position based on the value of rect relative to a bounding box with the specified size.
RelativeRect: An immutable 2D, axis-aligned, floating-point rectangle whose coordinates are given relative to another rectangle's edges, known as the container. Since the dimensions of the rectangle are relative to those of the container, this class has no width and height members. To determine the width or height of the rectangle, convert it to a Rect using toRect() (passing the container's own Rect), and then examine that object.
RelativeRectTween: An interpolation between two relative rects.
RenderBox: A render object in a 2D Cartesian coordinate system.
RenderIgnoredSkeleton: A Render object that paints nothing when skeletonizer is enabled
RenderNestedScrollViewViewport: The RenderViewport variant used by NestedScrollView.
RenderObject: An object in the render tree.
RenderObjectElement: An Element that uses a RenderObjectWidget as its configuration.
RenderObjectToWidgetAdapter<T extends RenderObject>: A bridge from a RenderObject to an Element tree.
RenderObjectToWidgetElement<T extends RenderObject>: The root of an element tree that is hosted by a RenderObject.
RenderObjectWidget: RenderObjectWidgets provide the configuration for RenderObjectElements, which wrap RenderObjects, which provide the actual rendering of the application.
RenderRawSortableStack
RenderScrollableClientViewport
RenderSemanticsGestureHandler: Listens for the specified gestures from the semantics server (e.g. an accessibility tool).
RenderSliverFillRemainingBoxAdapter
RenderSliverOverlapAbsorber: A sliver that wraps another, forcing its layout extent to be treated as overlap.
RenderSliverOverlapInjector: A sliver that has a sliver geometry based on the values stored in a SliverOverlapAbsorberHandle.
RenderTableLayout
RenderTapRegion: A render object that defines a region that can detect taps inside or outside of itself and any group of regions it belongs to, without participating in the gesture disambiguation system.
RenderTapRegionSurface: A render object that provides notification of a tap inside or outside of a set of registered regions, without participating in the gesture disambiguation system (other than to consume tap down events if TapRegion.consumeOutsideTaps is true).
RenderTreeRootElement: A RenderObjectElement used to manage the root of a render tree.
RenderTwoDimensionalViewport: A base class for viewing render objects that scroll in two dimensions.
ReorderableDelayedDragStartListener: A wrapper widget that will recognize the start of a drag operation by looking for a long press event. Once it is recognized, it will start a drag operation on the wrapped item in the reorderable list.
ReorderableDragStartListener: A wrapper widget that will recognize the start of a drag on the wrapped widget by a PointerDownEvent, and immediately initiate dragging the wrapped item to a new location in a reorderable list.
ReorderableList: A scrolling container that allows the user to interactively reorder the list items.
ReorderableListState: The state for a list that allows the user to interactively reorder the list items.
RepaintBoundary: A widget that creates a separate display list for its child.
RepeatedAnimationBuilder<T>: An animated widget that continuously repeats an animation between two values.
ReplaceResult<T>
ReplaceTextIntent: An Intent that represents a user interaction that attempts to modify the current TextEditingValue in an input field.
RequestFocusAction: An Action that requests the focus on the node it is given in its RequestFocusIntent.
RequestFocusIntent: An intent for use with the RequestFocusAction, which supplies the FocusNode that should be focused.
ResizableData
ResizableDraggerTheme: Theme for HorizontalResizableDragger and VerticalResizableDragger.
ResizablePane
ResizablePanel: A container widget that creates resizable panels separated by interactive dividers.
ResizableTable
ResizableTableController
ResizableTableTheme
ResizeImage: Instructs Flutter to decode the image at the specified dimensions instead of at its native size.
ResizeImageKey: Key used internally by ResizeImage.
RestorableBool: A RestorableProperty that knows how to store and restore a bool.
RestorableBoolN: A RestorableProperty that knows how to store and restore a bool that is nullable.
RestorableChangeNotifier<T extends ChangeNotifier>: A base class for creating a RestorableProperty that stores and restores a ChangeNotifier.
RestorableDateTime: A RestorableValue that knows how to save and restore DateTime.
RestorableDateTimeN: A RestorableValue that knows how to save and restore DateTime that is nullable.
RestorableDouble: A RestorableProperty that knows how to store and restore a double.
RestorableDoubleN: A RestorableProperty that knows how to store and restore a double that is nullable.
RestorableEnum<T extends Enum>: A RestorableProperty that knows how to store and restore an Enum type.
RestorableEnumN<T extends Enum>: A RestorableProperty that knows how to store and restore a nullable Enum type.
RestorableInt: A RestorableProperty that knows how to store and restore an int.
RestorableIntN: A RestorableProperty that knows how to store and restore an int that is nullable.
RestorableListenable<T extends Listenable>: A base class for creating a RestorableProperty that stores and restores a Listenable.
RestorableNum<T extends num>: A RestorableProperty that knows how to store and restore a num.
RestorableNumN<T extends num?>: A RestorableProperty that knows how to store and restore a num that is nullable.
RestorableProperty<T>: Manages an object of type T, whose value a State object wants to have restored during state restoration.
RestorableRouteFuture<T>: Gives access to a Route object and its return value that was added to a navigator via one of its "restorable" API methods.
RestorableString: A RestorableProperty that knows how to store and restore a String.
RestorableStringN: A RestorableProperty that knows how to store and restore a String that is nullable.
RestorableTextEditingController: A RestorableProperty that knows how to store and restore a TextEditingController.
RestorableValue<T>: A RestorableProperty that makes the wrapped value accessible to the owning State object via the value getter and setter.
RestorationBucket: A RestorationBucket holds pieces of the restoration data that a part of the application needs to restore its state.
RestorationScope: Creates a new scope for restoration IDs used by descendant widgets to claim RestorationBuckets.
ReverseAnimation: An animation that is the reverse of another animation.
ReverseTween<T extends Object?>: A Tween that evaluates its parent in reverse.
RichText: A paragraph of rich text.
RootBackButtonDispatcher: The default implementation of back button dispatcher for the root router.
RootElement: The root of the element tree.
RootRenderObjectElement: Deprecated. Unused in the framework and will be removed in a future version of Flutter.
RootRestorationScope: Inserts a child bucket of RestorationManager.rootBucket into the widget tree and makes it available to descendants via RestorationScope.of.
RootWidget: A widget for the root of the widget tree.
RotatedBox: A widget that rotates its child by a integral number of quarter turns.
RotateEffect: Effect that rotates the target between begin and end (via RotationTransition). Values are specified in "turns" (360° or 2𝝅 radians), so a begin=0.25, end=2.25 would start with the child rotated a quarter turn clockwise (90 degrees), and rotate two full turns (ending at 810 degrees). Defaults to begin=-1.0, end=0.
RotationTransition: Animates the rotation of a widget.
RoundedRectangleBorder: A rectangular border with rounded corners.
RoundedSuperellipseBorder: A rectangular border with rounded corners following the shape of an RSuperellipse.
Route<T>: An abstraction for an entry managed by a Navigator.
RouteAware: An interface for objects that are aware of their current Route.
RouteInformation: A piece of routing information.
RouteInformationParser<T>: A delegate that is used by the Router widget to parse a route information into a configuration of type T.
RouteInformationProvider: A route information provider that provides route information for the Router widget
RouteObserver<R extends Route>: A Navigator observer that notifies RouteAwares of changes to the state of their Route.
Router<T>: The dispatcher for opening and closing pages of an application.
RouterConfig<T>: A convenient bundle to configure a Router widget.
RouterDelegate<T>: A delegate that is used by the Router widget to build and configure a navigating widget.
RouteSettings: Data that might be useful in constructing a Route.
RouteTransitionRecord: A Route wrapper interface that can be staged for TransitionDelegate to decide how its underlying Route should transition on or off screen.
Row: A widget that displays its children in a horizontal array.
RRect: An immutable rounded rectangle with the custom radii for all four corners.
RSTransform: A transform consisting of a translation, a rotation, and a uniform scale.
RSuperellipse: An immutable rounded superellipse.
SafeArea: A widget that insets its child with sufficient padding to avoid intrusions by the operating system.
SafeLerp<T>
SafePasswordValidator
SaturateEffect: An effect that animates the color saturation of the target. The begin and end values indicate the saturation level, where 0 is fully desaturated (ie. grayscale) and 1 is normal saturation. Values >1 will oversaturate. Defaults to begin=0, end=1.
SawTooth: A sawtooth curve that repeats a given number of times over the unit interval.
Scaffold: A fundamental layout widget that provides the basic structure for screen layouts.
ScaffoldBarData
ScaffoldBoxConstraints
ScaffoldFooterPadding
ScaffoldHeaderPadding
ScaffoldPaddingStorage
ScaffoldState
ScaffoldTheme: Theme data for customizing Scaffold widget appearance.
ScaleEffect: An effect that scales the target between the specified begin and end offset values (via Transform.scale). Defaults to begin=Offset(0,0), end=Offset(1,1).
ScaleEndDetails: Details for GestureScaleEndCallback.
ScaleStartDetails: Details for GestureScaleStartCallback.
ScaleTransition: Animates the scale of a transformed widget.
ScaleUpdateDetails: Details for GestureScaleUpdateCallback.
Scrollable: A widget that manages scrolling in one dimension and informs the Viewport through which the content is viewed.
ScrollableClient
ScrollableClientTheme: Theme data for ScrollableClient.
ScrollableClientViewport
ScrollableDetails: Describes the aspects of a Scrollable widget to inform inherited widgets like ScrollBehavior for decorating or enumerate the properties of combined Scrollables, such as TwoDimensionalScrollable.
ScrollableSortableLayer: A sortable layer that provides automatic scrolling during drag operations.
ScrollableState: State object for a Scrollable widget.
ScrollAction: An Action that scrolls the relevant Scrollable by the amount configured in the ScrollIntent given to it.
ScrollActivity: Base class for scrolling activities like dragging and flinging.
ScrollActivityDelegate: A backend for a ScrollActivity.
ScrollAdapter: Drives an Animate animation from a ScrollController.
ScrollAwareImageProvider<T extends Object>: An ImageProvider that makes use of Scrollable.recommendDeferredLoadingForContext to avoid loading images when rapidly scrolling.
Scrollbar
ScrollbarPainter: Paints a scrollbar's track and thumb.
ScrollbarTheme: Theme configuration for Scrollbar.
ScrollBehavior: Describes how Scrollable widgets should behave.
ScrollConfiguration: Controls how Scrollable widgets behave in a subtree.
ScrollContext: An interface that Scrollable widgets implement in order to use ScrollPosition.
ScrollController: Controls a scrollable widget.
ScrollDragController: Scrolls a scroll view as the user drags their finger across the screen.
ScrollEndNotification: A notification that a Scrollable widget has stopped scrolling.
ScrollHoldController: Interface for holding a Scrollable stationary.
ScrollIncrementDetails: A details object that describes the type of scroll increment being requested of a ScrollIncrementCalculator function, as well as the current metrics for the scrollable.
ScrollIntent: An Intent that represents scrolling the nearest scrollable by an amount appropriate for the type specified.
ScrollMetricsNotification: A notification that a scrollable widget's ScrollMetrics have changed.
ScrollNotification: A Notification related to scrolling.
ScrollNotificationObserver: Notifies its listeners when a descendant scrolls.
ScrollNotificationObserverState: The listener list state for a ScrollNotificationObserver returned by ScrollNotificationObserver.of.
ScrollPhysics: Determines the physics of a Scrollable widget.
ScrollPosition: Determines which portion of the content is visible in a scroll view.
ScrollPositionWithSingleContext: A scroll position that manages scroll activities for a single ScrollContext.
ScrollSpringSimulation: A SpringSimulation where the value of x is guaranteed to have exactly the end value when the simulation isDone.
ScrollStartNotification: A notification that a Scrollable widget has started scrolling.
ScrollToDocumentBoundaryIntent: Scrolls to the beginning or end of the document depending on the forward parameter.
ScrollUpdateNotification: A notification that a Scrollable widget has changed its scroll position.
ScrollView: A widget that combines a Scrollable and a Viewport to create an interactive scrolling pane of content in one dimension.
ScrollViewInterceptor
SecondaryBadge
SecondaryButton
SecondaryButtonTheme
Select<T>: A customizable dropdown selection widget for single-value selection.
SelectableRegion: A widget that introduces an area for user selections.
SelectableRegionSelectionStatusScope: Notifies its listeners when the selection under a SelectableRegion or SelectionArea is being changed or finalized.
SelectableRegionState: State for a SelectableRegion.
SelectableText
SelectableTextTheme: Theme data for SelectableText to customize cursor and selection behavior.
SelectAction: An action that selects the currently focused control.
SelectAllTextIntent: An Intent to select everything in the field.
SelectController<T>: Controller for managing ControlledSelect state programmatically.
SelectData
SelectedButton
SelectedButtonState
SelectGroup
SelectIntent: An Intent that selects the currently focused control.
SelectionContainer: A container that handles SelectionEvents for the Selectables in the subtree.
SelectionContainerDelegate: A delegate to handle SelectionEvents for a SelectionContainer.
SelectionDetails: A read-only interface for accessing the details of a selection under a SelectionListener.
SelectionListener: A SelectionContainer that allows the user to access the SelectionDetails and listen to selection changes for the child subtree it wraps under a SelectionArea or SelectableRegion.
SelectionListenerNotifier: Notifies listeners when the selection under a SelectionListener has been changed.
SelectionOverlay: An object that manages a pair of selection handles and a toolbar.
SelectionRegistrarScope: An inherited widget to host a SelectionRegistrar for the subtree.
SelectItem
SelectItemBuilder
SelectItemButton<T>
SelectItemDelegate
SelectItemList
SelectLabel
SelectPopup<T>
SelectState<T>
SelectSuggestionIntent
SelectTheme: Theme data for customizing Select widget appearance and behavior.
SelectTreeNodeIntent
Semantics: A widget that annotates the widget tree with a description of the meaning of the widgets.
SemanticsDebugger: A widget that visualizes the semantics for the child.
SemanticsGestureDelegate: A base class that describes what semantics notations a RawGestureDetector should add to the render object RenderSemanticsGestureHandler.
SensitiveContent: Widget to set the ContentSensitivity of content in the widget tree.
SensitiveContentHost: Host of the current content sensitivity for the widget tree that contains some number SensitiveContent widgets.
SeparatedFlex
SeparatedIterable<T>
SeparatedIterator<T>
SetChangeDetails<T>: A set change details containing the added and removed elements.
SetListenable<T>: A set that can be listened to for changes.
SetNotifier<T>: A set notifier class that allows mutable updates and notifies listeners of changes.
ShadcnAnimatedTheme
ShadcnApp
ShadcnLayer
ShadcnLocalizations
ShadcnLocalizationsDelegate
ShadcnPointArcTween
ShadcnRectArcTween
ShadcnScrollBehavior
ShadcnSkeletonizerConfigLayer: A configuration layer that provides Skeletonizer setup with theme integration.
ShadcnUI
Shader: Base class for objects such as Gradient and ImageShader which correspond to shaders as used by Paint.shader.
ShaderEffect: Effect that applies an animated fragment shader to a target. See Writing and using fragment shaders for information on how to include shaders in your app.
ShaderMask: A widget that applies a mask generated by a Shader to its child.
ShaderUpdateDetails: Passed to the ShaderEffect.update callback. Contains information necessary for updating the shader:
ShaderWarmUp: Interface for drawing an image to warm up Skia shader compilations.
Shadow: A single shadow.
ShakeEffect: Effect that shakes the target, using translation, rotation, or both (via Transform).
ShapeBorder: Base class for shape outlines.
ShapeBorderClipper: A CustomClipper that clips to the outer path of a ShapeBorder.
ShapeDecoration: An immutable description of how to paint an arbitrary shape.
SharedAppData: Enables sharing key/value data with its child and all of the child's descendants.
SheetOverlayHandler
SheetSwiperHandler: Sheet-style swiper handler with minimal styling.
SheetWrapper
ShimmerEffect: Builds a painting effect where a linear gradient is used to create a shimmer-like effect
ShortcutActivator: An interface to define the keyboard key combination to trigger a shortcut.
ShortcutManager: A manager of keyboard shortcut bindings used by Shortcuts to handle key events.
ShortcutMapProperty: A DiagnosticsProperty which handles formatting a Map<LogicalKeySet, Intent> (the same type as the Shortcuts.shortcuts property) so that its diagnostic output is human-readable.
ShortcutRegistrar: A widget that holds a ShortcutRegistry which allows descendants to add, remove, or replace shortcuts.
ShortcutRegistry: A class used by ShortcutRegistrar that allows adding or removing shortcut bindings by descendants of the ShortcutRegistrar.
ShortcutRegistryEntry: A entry returned by ShortcutRegistry.addAll that allows the caller to identify the shortcuts they registered with the ShortcutRegistry through the ShortcutRegistrar.
Shortcuts: A widget that creates key bindings to specific actions for its descendants.
ShortcutSerialization: A class used by MenuSerializableShortcut to describe the shortcut for serialization to send to the platform for rendering a PlatformMenuBar.
ShrinkWrappingViewport: A widget that is bigger on the inside and shrink wraps its children in the main axis.
SignalBuilder
Simulation: The base class for all simulations.
SingleActivator: A shortcut key combination of a single key and modifiers.
SingleCalendarValue: Calendar value representing a single selected date.
SingleChartColorScheme
SingleChildLayoutDelegate: A delegate for computing the layout of a render object with a single child.
SingleChildRenderObjectElement: An Element that uses a SingleChildRenderObjectWidget as its configuration.
SingleChildRenderObjectWidget: A superclass for RenderObjectWidgets that configure RenderObject subclasses that have a single child slot.
SingleChildScrollView: A box in which a single widget can be scrolled.
Size: Holds a 2D floating-point size.
SizeChangedLayoutNotification: Indicates that the size of one of the descendants of the object receiving this notification has changed, and that therefore any assumptions about that layout are no longer valid.
SizeChangedLayoutNotifier: A widget that automatically dispatches a SizeChangedLayoutNotification when the layout dimensions of its child change.
SizedBox: A box with a specified size.
SizedOverflowBox: A widget that is a specific size but passes its original constraints through to its child, which may then overflow.
SizeTransition: Animates its own size and clips and aligns its child.
SizeTween: An interpolation between two sizes.
SizeUnitLocale
Skeleton: An interface for a skeleton annotation widget skeleton annotation widgets are used to configure or customize how the skeleton effect is applied to the child widget
Skeletonizer: Paints a skeleton of the child widget
SkeletonizerConfig: Provided the scoped SkeletonizerConfigData to descended widgets
SkeletonizerConfigData: The immutable configuration data for the skeletonizer theme.
SkeletonizerScope: Provides the skeletonizer activation information to the descent widgets
SkeletonizerState: The state of Skeletonizer widget
SkeletonTheme: Theme configuration for skeleton loading effects.
SlideEffect: An effect that moves the target based on a fraction of its size per the specified begin and end offsets (via SlideTransition). Defaults to begin=Offset(0, -0.5), end=Offset.zero (slide down from half its height).
Slider
SliderController: Reactive controller for managing slider state with value operations.
SliderTheme: Theme for Slider.
SliderValue
SlideTransition: Animates the position of a widget relative to its normal position.
SlidingCarouselTransition: A sliding carousel transition.
SliverAnimatedGrid: A SliverGrid that animates items when they are inserted or removed.
SliverAnimatedGridState: The state for a SliverAnimatedGrid that animates items when they are inserted or removed.
SliverAnimatedList: A SliverList that animates items when they are inserted or removed.
SliverAnimatedListState: The state for a SliverAnimatedList that animates items when they are inserted or removed.
SliverAnimatedOpacity: Animated version of SliverOpacity which automatically transitions the sliver child's opacity over a given duration whenever the given opacity changes.
SliverAnimatedPaintExtent: SliverAnimatedPaintExtent allows for smoothly animating maxPaintExtent changes
SliverAnimatedSwitcher: SliverAnimatedSwitcher sets up an AnimatedSwitcher widget such that it can be used as a sliver by using SliverStack and SliverFadeTransition
SliverAppBar: A Material Design app bar that integrates with a CustomScrollView.
SliverChildBuilderDelegate: A delegate that supplies children for slivers using a builder callback.
SliverChildDelegate: A delegate that supplies children for slivers.
SliverChildListDelegate: A delegate that supplies children for slivers using an explicit list.
SliverClip: SliverClip clips its sliver child from its paintOrigin to its paintExtent. Also clips off any overlap if clipOverlap is true
SliverConstrainedCrossAxis: A sliver that constrains the cross axis extent of its sliver child.
SliverCrossAxisConstrained: Constrains and centers the child sliver to a maximum cross axis extent specified by maxCrossAxisExtent. alignment specifies how to align the child where -1 is left +1 is right.
SliverCrossAxisExpanded: Set a flex factor for allocating space in the cross axis direction.
SliverCrossAxisGroup: A sliver that places multiple sliver children in a linear array along the cross axis.
SliverCrossAxisPadded: Constrains and centers the child sliver to a maximum cross axis extent specified by paddingStart.
SliverEnsureSemantics: A sliver that ensures its sliver child is included in the semantics tree.
SliverFadeTransition: Animates the opacity of a sliver widget.
SliverFillRemaining: A sliver that contains a single box child that fills the remaining space in the viewport.
SliverFillRemainingBoxAdapter
SliverFillViewport: A sliver that contains multiple box children that each fills the viewport.
SliverFixedExtentList: A sliver that places multiple box children with the same main axis extent in a linear array.
SliverFloatingHeader: A sliver that shows its child when the user scrolls forward and hides it when the user scrolls backwards.
SliverGap: A sliver that takes a fixed amount of space.
SliverGrid: A sliver that places multiple box children in a two dimensional arrangement.
SliverGridDelegate: Controls the layout of tiles in a grid.
SliverGridDelegateWithFixedCrossAxisCount: Creates grid layouts with a fixed number of tiles in the cross axis.
SliverGridDelegateWithMaxCrossAxisExtent: Creates grid layouts with tiles that each have a maximum cross-axis extent.
SliverIgnorePointer: A sliver widget that is invisible during hit testing.
SliverLayoutBuilder: Builds a sliver widget tree that can depend on its own SliverConstraints.
SliverList: A sliver that places multiple box children in a linear array along the main axis.
SliverMainAxisGroup: A sliver that places multiple sliver children in a linear array along the main axis, one after another.
SliverMultiBoxAdaptorElement: An element that lazily builds children for a SliverMultiBoxAdaptorWidget.
SliverMultiBoxAdaptorWidget: A base class for slivers that have multiple box children.
SliverOffstage: A sliver that lays its sliver child out as if it was in the tree, but without painting anything, without making the sliver child available for hit testing, and without taking any room in the parent.
SliverOpacity: A sliver widget that makes its sliver child partially transparent.
SliverOverlapAbsorber: A sliver that wraps another, forcing its layout extent to be treated as overlap.
SliverOverlapAbsorberHandle: Handle to provide to a SliverOverlapAbsorber, a SliverOverlapInjector, and an NestedScrollViewViewport, to shift overlap in a NestedScrollView.
SliverOverlapInjector: A sliver that has a sliver geometry based on the values stored in a SliverOverlapAbsorberHandle.
SliverPadding: A sliver that applies padding on each side of another sliver.
SliverPersistentHeader: A sliver whose size varies when the sliver is scrolled to the edge of the viewport opposite the sliver's GrowthDirection.
SliverPersistentHeaderDelegate: Delegate for configuring a SliverPersistentHeader.
SliverPinnedHeader: SliverPinnedHeader keeps its child pinned to the leading edge of the viewport.
SliverPositioned: A widget that controls where a box child of a SliverStack is positioned.
SliverPrototypeExtentList: A sliver that places its box children in a linear array and constrains them to have the same extent as a prototype item along the main axis.
SliverReorderableList: A sliver list that allows the user to interactively reorder the list items.
SliverReorderableListState: The state for a sliver list that allows the user to interactively reorder the list items.
SliverResizingHeader: A sliver that is pinned to the start of its CustomScrollView and reacts to scrolling by resizing between the intrinsic sizes of its min and max extent prototypes.
SliverSafeArea: A sliver that insets another sliver by sufficient padding to avoid intrusions by the operating system.
SliverSemantics: A sliver that annotates its subtree with a description of the meaning of the slivers.
SliverSkeletonizer: A Skeletonizer widget that can be used in a CustomScrollView
SliverStack: A Stack widget that can be used as a sliver
SliverToBoxAdapter: A sliver that contains a single box widget.
SliverVariedExtentList: A sliver that places its box children in a linear array and constrains them to have the corresponding extent returned by itemExtentBuilder.
SliverVisibility: Whether to show or hide a sliver child.
SliverWithKeepAliveWidget: A base class for slivers that have KeepAlive children.
SlottedMultiChildRenderObjectWidget<SlotType, ChildType extends RenderObject>: A superclass for RenderObjectWidgets that configure RenderObject subclasses that organize their children in different slots.
SlottedRenderObjectElement<SlotType, ChildType extends RenderObject>: Element used by the SlottedMultiChildRenderObjectWidget.
SnapshotController: A controller for the SnapshotWidget that controls when the child image is displayed and when to regenerated the child image.
SnapshotPainter: A painter used to paint either a snapshot or the child widgets that would be a snapshot.
SnapshotWidget: A widget that can replace its child with a snapshotted version of the child.
SoftEdgeBlur: A widget that applies a soft blur effect to the edges of its child.
SoldColorEffect: Creates a none-animated painting effect
SolidBorderMode: Removes the dashed border mode
Sortable<T>: A draggable widget that supports drag-and-drop reordering with directional drop zones.
SortableChildBuilderDelegate<T>
SortableChildListDelegate<T>
SortableData<T>: Immutable data wrapper for sortable items in drag-and-drop operations.
SortableDragHandle: A dedicated drag handle for initiating sortable drag operations.
SortableDropFallback<T>: A fallback drop zone for sortable items when dropped outside specific sortable widgets.
SortableLayer: A layer widget that manages drag-and-drop sessions for sortable widgets.
SortableListDelegate<T>
Spacer: Spacer creates an adjustable, empty spacer that can be used to tune the spacing between widgets in a Flex container, like Row or Column.
SpellCheckConfiguration: Controls how spell check is performed for text input.
Split: A curve that progresses according to beginCurve until split, then according to endCurve.
SpringDescription: Structure that describes a spring's constants.
SSSS
Stack: A widget that positions its children relative to the edges of its box.
StadiumBorder: A border that fits a stadium-shaped border (a box with semicircles on the ends) within the rectangle of the widget it is applied to.
StageBreakpoint
StageContainer
StageContainerTheme
StagedBreakpoint
StarBorder: A border that fits a star or polygon-shaped border within the rectangle of the widget it is applied to.
StarRating: An interactive star rating widget for collecting user feedback and ratings.
StarRatingController: A controller for managing StarRating widget values programmatically.
StarRatingTheme: Theme data for customizing StarRating widget appearance.
State<T extends StatefulWidget>: The logic and internal state for a StatefulWidget.
StatedWidget: An abstract widget that provides state-aware visual variations.
StateExtension
StatefulBuilder: A platonic widget that both has state and calls a closure to obtain its child widget.
StatefulElement: An Element that uses a StatefulWidget as its configuration.
StatefulHookWidget: A StatefulWidget that can use a Hook.
StatefulWidget: A widget that has mutable state.
StatelessElement: An Element that uses a StatelessWidget as its configuration.
StatelessWidget: A widget that does not require mutable state.
StaticPart
StaticSelectionContainerDelegate: A delegate that manages updating multiple Selectable children where the Selectables do not change or move around frequently.
StatusTransitionWidget: A widget that rebuilds when the given animation changes status.
Step: Represents a single step in a stepper component.
StepContainer: Container widget for step content with optional action buttons.
StepItem
StepNumber: Step indicator widget displaying step number, checkmark, or custom icon.
StepNumberData: Data class providing step index context to descendant widgets.
Stepper: A multi-step navigation component with visual progress indication.
StepperController: Controller for managing stepper state and navigation.
StepperTheme: Theme configuration for Stepper components.
StepperValue: Immutable value representing the current state of a stepper.
StepProperties: Contains properties and state information for stepper rendering.
Steps: Vertical step progression widget with numbered indicators and connectors.
StepsTheme: Theme for Steps.
StepTitle: Clickable step title widget with optional subtitle.
StepTween: An interpolation between two integers that floors.
StepVariant: Abstract base class for step visual presentation variants.
StillKeyframe<T>
Store<StateT, ActionT>: A store of mutable state that allows mutations by dispatching actions.
StreamBuilder<T>: Widget that builds itself based on the latest snapshot of interaction with a Stream.
StreamBuilderBase<T, S>: Base class for widgets that build themselves based on interaction with a specified Stream.
StreamOnce<T>
StreamOnceState<T>
StretchingOverscrollIndicator: A Material Design visual indication that a scroll view has overscrolled.
StrutStyle: Defines the strut, which sets the minimum height a line can be relative to the baseline.
SubFocus: Individual focusable widget within a SubFocusScope hierarchy.
SubFocusScope: Hierarchical focus management system for complex widget trees.
SubmissionResult
SubmitButton
SurfaceBarrierPainter: Custom painter that creates a barrier effect with an optional cutout.
SurfaceBlur
SurfaceCard
SwapEffect: An effect that swaps out the incoming child for a new child at a particular point in time. This includes all preceding effects. It uses a builder so that the effect can be reused, but note that the builder is only called once when the effect initially builds.
SweepGradient: A 2D sweep gradient.
Swiper: A gesture-responsive widget that triggers overlay content through swiping.
SwiperHandler: Abstract handler interface for swiper overlay implementations.
SwiperTheme: Theme configuration for swiper overlay behavior and appearance.
Switch
SwitchAnimationConfig: Holds the configuration for the switch animation
SwitchController
Switcher: A swipeable container that transitions between multiple child widgets.
SwitchTheme: Theme configuration for Switch widget styling and visual appearance.
SystemContextMenu: Displays the system context menu on top of the Flutter view.
SystemMouseCursors: A collection of system MouseCursors.
SystemTextScaler: A TextScaler that reflects the user's font scale preferences from the platform's accessibility settings.
TabButton
TabChildWidget
TabContainer
TabContainerData
TabContainerTheme: Theme data for TabContainer providing default builders.
TabItem
Table: A flexible table widget with support for spanning, scrolling, and interactive features.
TableBorder: Border specification for Table widgets.
TableCell
TableCellTheme: Theme configuration for individual table cells.
TableColumnWidth: Base class to describe how wide a column in a RenderTable should be.
TableFooter
TableHeader
TableLayoutResult
TableParentData
TableRef
TableRow
TableSize
TableTheme: Theme configuration for Table components.
TabList: A horizontal tab list widget for selecting between multiple tab content areas.
TabListTheme: Theme configuration for TabList appearance and behavior.
TabPane<T>: A comprehensive tab pane widget with sortable tabs and integrated content display.
TabPaneData<T>: Data wrapper for tab pane items that extends sortable functionality.
TabPaneState<T>
TabPaneTheme: Theme configuration for TabPane appearance and layout.
Tabs: A tabbed interface widget for organizing content into switchable panels.
TabsTheme: Theme data for customizing Tabs widget appearance.
TapDownDetails: Details for GestureTapDownCallback, such as position.
TapRegion: A widget that defines a region that can detect taps inside or outside of itself and any group of regions it belongs to, without participating in the gesture disambiguation system (other than to consume tap down events if consumeOutsideTaps is true).
TapRegionRegistry: An interface for registering and unregistering a RenderTapRegion (typically created with a TapRegion widget) with a RenderTapRegionSurface (typically created with a TapRegionSurface widget).
TapRegionSurface: A widget that provides notification of a tap inside or outside of a set of registered regions, without participating in the gesture disambiguation system.
TapUpDetails: Details for GestureTapUpCallback, such as position.
Text: A run of text with a single style.
TextAlignVertical: The vertical alignment of text within an input box.
TextArea: A multi-line text input widget with resizable dimensions and comprehensive styling.
TextAreaTheme: Theme data for customizing TextArea appearance.
TextBoneBorderRadius: Holds border radius information for TextElement
TextBox: A rectangle enclosing a run of text.
TextButton
TextButtonTheme
TextDecoration: A linear decoration to draw near the text.
TextEditingController: A controller for an editable text field.
TextEditingValue: The current text, selection, and composing state for editing a run of text.
TextField: A highly customizable single-line text input widget with extensive feature support.
TextFieldAppendTextIntent
TextFieldClearIntent
TextFieldReplaceCurrentWordIntent
TextFieldSelectAllAndCopyIntent
TextFieldSetSelectionIntent
TextFieldSetTextIntent
TextFieldState
TextFieldTapRegion: A TapRegion that adds its children to the tap region group for widgets based on the EditableText text editing widget, such as TextField and CupertinoTextField.
TextFieldTheme: Theme data for customizing TextField appearance.
TextHeightBehavior: Defines how to apply TextStyle.height over and under text.
TextInputFormatters
TextInputType: The type of information for which to optimize the text input control.
TextMagnifierConfiguration: A configuration object for a magnifier (e.g. in a text field).
TextModifier
TextPainter: An object that paints a TextSpan tree into a Canvas.
TextPosition: A position in a string of text.
TextRange: A range of characters in a string of text.
TextScaler: A class that describes how textual contents should be scaled for better readability.
TextSelection: A range of text that represents a selection.
TextSelectionControls: An interface for building the selection UI, to be provided by the implementer of the toolbar widget.
TextSelectionGestureDetector: A gesture detector to respond to non-exclusive event chains for a text field.
TextSelectionGestureDetectorBuilder: Builds a TextSelectionGestureDetector to wrap an EditableText.
TextSelectionGestureDetectorBuilderDelegate: Delegate interface for the TextSelectionGestureDetectorBuilder.
TextSelectionOverlay: An object that manages a pair of text selection handles for a RenderEditable.
TextSelectionPoint: Represents the coordinates of the point in a selection, and the text direction at that point, relative to top left of the RenderEditable that holds the selection.
TextSelectionToolbarAnchors: The position information for a text selection toolbar.
TextSelectionToolbarLayoutDelegate: A SingleChildLayoutDelegate for use with CustomSingleChildLayout that positions its child above anchorAbove if it fits, or otherwise below anchorBelow.
TextSpan: An immutable span of text.
TextStyle: An immutable style describing how to format and paint text.
TextStyleTween: An interpolation between two TextStyles.
Texture: A rectangle upon which a backend texture is mapped.
Theme
ThemeData
ThemeDataTween
ThenEffect: A special convenience "effect" that makes it easier to sequence effects after one another. It does this by establishing a new baseline time equal to the previous effect's end time and its own optional delay. All subsequent effect delays are relative to this new baseline.
ThreePointCubic: A cubic polynomial composed of two curves that share a common center point.
Threshold: A curve that is 0.0 until it hits the threshold, then it jumps to 1.0.
ThrottleFunction
TickerFuture: An object representing an ongoing Ticker sequence.
TickerMode: Enables or disables tickers (and thus animation controllers) in the widget subtree.
TickerProvider: An interface implemented by classes that can vend Ticker objects.
TimeInput: Reactive time input field with formatted text editing and validation.
Timeline: A vertical timeline widget for displaying chronological data.
TimelineAnimatable<T>
TimelineAnimation<T>
TimelineData: Data model for individual timeline entries.
TimelineTheme: Theme configuration for Timeline widgets.
TimeOfDay
TimePicker
TimePickerController: A controller for managing ControlledTimePicker values programmatically.
TimePickerDialog
TimePickerTheme
TimeRange
TintEffect: An effect that applies an animated color tint to the target (via ColorFiltered). The begin and end values indicate the strength of the tint (0 - 0% tint, 1 - 100% tint). Defaults to begin=0, end=1.
Title: A widget that describes this app in the operating system.
ToastEntry
ToastEntryLayout
ToastLayer: A sophisticated layer widget that provides toast notification infrastructure.
ToastOverlay: Abstract interface for controlling individual toast notification instances.
ToastTheme: Theme configuration for toast notification system.
Toggle: Simple toggle button with stateful on/off behavior.
ToggleablePainter: A base class for a CustomPainter that may be passed to ToggleableStateMixin.buildToggleable to draw the visual representation of a Toggleable.
ToggleController: A controller for managing toggle state in toggle buttons and switches.
ToggleEffect: An effect that allows you to toggle the behavior of a builder function at a certain point in time.
ToggleState
Tolerance: Structure that specifies maximum allowable magnitudes for distances, durations, and velocity differences to be considered equal.
ToolbarItemsParentData: ParentData that determines whether or not to paint the corresponding child.
ToolbarOptions: Toolbar configuration for EditableText.
Tooltip: An interactive tooltip widget that displays contextual information on hover.
TooltipContainer
TooltipTheme: Theme data for customizing TooltipContainer widget appearance.
Tracker: A widget that displays a tracker.
TrackerData: A data container for individual tracker segments.
TrackerLevel: An abstract class that defines values for different Tracker levels.
TrackerTheme: Theme configuration for Tracker components.
TrackingScrollController: A ScrollController whose initialScrollOffset tracks its most recently updated ScrollPosition.
TrainHoppingAnimation: This animation starts by proxying one animation, but when the value of that animation crosses the value of the second (either because the second is going in the opposite direction, or because the one overtakes the other), the animation hops over to proxying the second animation.
Transform: A widget that applies a transformation before painting its child.
TransformationController: A thin wrapper on ValueNotifier whose value is a Matrix4 representing a transformation.
Transformers
TransformProperty: Property which handles Matrix4 that represent transforms.
TransitionDelegate<T>: The delegate that decides how pages added and removed from Navigator.pages transition in or out of the screen.
TransitionRoute<T>: A route with entrance and exit transitions.
TransposeCharactersIntent: An Intent that represents a user interaction that attempts to swap the characters immediately around the cursor.
TreeItem<T>: A concrete tree node implementation that holds data and state.
TreeItemExpandDefaultHandler<T>
TreeItemView: A comprehensive tree item widget with interaction, expansion, and selection support.
TreeNode<T>: Abstract base class representing a node in a tree structure.
TreeNodeData<T>
TreeNodeDepth
TreeRoot<T>: A special tree node that serves as an invisible root container.
TreeSelectionDefaultHandler<T>
TreeSliver<T>: A widget that displays TreeSliverNodes that expand and collapse in a vertically and horizontally scrolling Viewport.
TreeSliverController: Enables control over the TreeSliverNodes of a TreeSliver.
TreeSliverNode<T>: A data structure for configuring children of a TreeSliver.
TreeTheme: Theme configuration for TreeView appearance and behavior.
TreeView<T>: A comprehensive tree view widget with hierarchical data display and interaction.
Tween<T extends Object?>: A linear interpolation between a beginning and ending value.
TweenAnimationBuilder<T extends Object?>: Widget builder that animates a property of a Widget to a target value whenever the target value changes.
TweenSequence<T>: Enables creating an Animation whose value is defined by a sequence of Tweens.
TweenSequenceItem<T>: A simple holder for one element of a TweenSequence.
TwoDimensionalChildBuilderDelegate: A delegate that supplies children for a TwoDimensionalScrollView using a builder callback.
TwoDimensionalChildDelegate: A delegate that supplies children for scrolling in two dimensions.
TwoDimensionalChildListDelegate: A delegate that supplies children for a TwoDimensionalViewport using an explicit two dimensional array.
TwoDimensionalChildManager: A delegate used by RenderTwoDimensionalViewport to manage its children.
TwoDimensionalScrollable: A widget that manages scrolling in both the vertical and horizontal dimensions and informs the TwoDimensionalViewport through which the content is viewed.
TwoDimensionalScrollableState: State object for a TwoDimensionalScrollable widget.
TwoDimensionalScrollView: A widget that combines a TwoDimensionalScrollable and a TwoDimensionalViewport to create an interactive scrolling pane of content in both vertical and horizontal dimensions.
TwoDimensionalViewport: A widget through which a portion of larger content can be viewed, typically in combination with a TwoDimensionalScrollable.
TwoDimensionalViewportParentData: Parent data structure used by RenderTwoDimensionalViewport.
Typography
UiKitView: Embeds an iOS view in the Widget hierarchy.
UnconstrainedBox: A widget that imposes no constraints on its child, allowing it to render at its "natural" size.
UndoHistory<T>: Provides undo/redo capabilities for a ValueNotifier.
UndoHistoryController: A controller for the undo history, for example for an editable text field.
UndoHistoryState<T>: State for a UndoHistory.
UndoHistoryValue: Represents whether the current undo stack can undo or redo.
UndoTextIntent: An Intent that represents a user interaction that attempts to go back to the previous editing state.
UniqueKey: A key that is only equal to itself.
UniqueWidget<T extends State<StatefulWidget>>: Base class for stateful widgets that have exactly one inflated instance in the tree.
UnmanagedRestorationScope: Inserts a provided RestorationBucket into the widget tree and makes it available to descendants via RestorationScope.of.
UnorderedListData
UpdateSelectionIntent: An Intent that represents a user interaction that attempts to change the selection in an input field.
URLValidator
UserScrollNotification: A notification that the user has changed the ScrollDirection in which they are scrolling, or have stopped scrolling.
Uuid: uuid for Dart Author: Yulian Kuncheff Released under MIT License.
UuidValue
Validated<T>
ValidationMode<T>
ValidationResult
Validator<T>: Abstract base class for implementing form field validation logic.
ValidatorBuilder<T>
ValueAdapter: Drives an Animate animation directly from a value in the range 0-1
ValueChangeNotifier<T>: A value notifier class that notifies listeners of changes.
ValueKey<T>: A key that uses a value of a particular type to identify itself.
ValueListenableBuilder<T>: A widget whose content stays synced with a ValueListenable.
ValueNotifier<T>: A ChangeNotifier that holds a single value.
ValueNotifierAdapter: Drives an Animate animation from a ValueNotifier. The value from the notifier should be in the range 0-1.
ValueNotifierUnmodifiableView<T>: A read-only view of a ValueListenable.
Velocity: A velocity in two dimensions.
VerticalDivider
VerticalDividerPainter
VerticalResizableDragger: A Vertical dragger that can be used as a divider between resizable panes.
View: Bootstraps a render tree that is rendered into the provided FlutterView.
ViewAnchor: Decorates a child widget with a side View.
ViewCollection: A collection of sibling Views.
Viewport: A widget through which a portion of larger content can be viewed, typically in combination with a Scrollable.
Visibility: Whether to show or hide a child.
VisibilityEffect: An effect that toggles the visibility of the target (via Visibility). Defaults to end=true.
VoidCallbackAction: An Action that invokes the VoidCallback given to it in the VoidCallbackIntent passed to it when invoked.
VoidCallbackIntent: An Intent that keeps a VoidCallback to be invoked by a VoidCallbackAction when it receives this intent.
VoidChangeListener: A callback that takes no arguments and returns no data.
WaitingResult
WeakMap<K, V>: Does not hold keys from garbage collection.
Widget: Describes the configuration for an Element.
WidgetInputOTPChild
WidgetInspector: A widget that enables inspecting the child widget's structure.
WidgetOrderTraversalPolicy: A FocusTraversalPolicy that traverses the focus order in widget hierarchy order.
WidgetPart
WidgetsApp: A convenience widget that wraps a number of widgets that are commonly required for an application.
WidgetsBindingObserver: Interface for classes that register with the Widgets layer binding.
WidgetsFlutterBinding: A concrete binding for applications based on the Widgets framework.
WidgetsLocalizations: Interface for localized resource values for the lowest levels of the Flutter framework.
WidgetSpan: An immutable widget that is embedded inline within text.
WidgetStateBorderSide: Defines a BorderSide whose value depends on a set of WidgetStates which represent the interactive state of a component.
WidgetStateColor: Defines a Color that is also a WidgetStateProperty.
WidgetStateMapper<T>: Uses a WidgetStateMap to resolve to a single value of type T based on the current set of Widget states.
WidgetStateMouseCursor: Defines a MouseCursor whose value depends on a set of WidgetStates which represent the interactive state of a component.
WidgetStateOutlinedBorder: Defines an OutlinedBorder whose value depends on a set of WidgetStates which represent the interactive state of a component.
WidgetStateProperty<T>: Interface for classes that resolve to a value of type T based on a widget's interactive "state", which is defined as a set of WidgetStates.
WidgetStatePropertyAll<T>: Convenience class for creating a WidgetStateProperty that resolves to the given value for all states.
WidgetStatesConstraint: This class allows WidgetState enum values to be combined using WidgetStateOperators.
WidgetStatesController: Manages a set of WidgetStates and notifies listeners of changes.
WidgetStatesData
WidgetStatesProvider
WidgetStateTextStyle: Defines a TextStyle that is also a WidgetStateProperty.
WidgetToRenderBoxAdapter: An adapter for placing a specific RenderBox in the widget tree.
WidgetTreeChangeDetector
WillPopScope: Registers a callback to veto attempts by the user to dismiss the enclosing ModalRoute.
Window: A comprehensive windowing system for creating desktop-like window interfaces.
WindowActions
WindowController: Reactive controller for managing window state and operations.
WindowNavigator
WindowSnapStrategy: Configuration for window snapping behavior and positioning.
WindowState: Complete state configuration for a window instance.
WindowTheme: Theme configuration for window components.
WindowViewport
WindowWidget
WordBoundary: A TextBoundary subclass for locating word breaks.
Wrap: A widget that displays its children in multiple horizontal or vertical runs.
WrappedIcon
WrappedText
Wrapper
XFile: A CrossFile is a cross-platform, simplified File abstraction.
YearCalendar

Enums

AndroidOverscrollIndicator: Types of overscroll indicators supported by TargetPlatform.android.
AnimationBehavior: Configures how an AnimationController behaves when animations are disabled.
AnimationStatus: The status of an animation.
AppLifecycleState: States that an application can be in once it is running.
AutoCompleteMode: Text replacement strategies for autocomplete suggestion application.
AutofillContextAction: Predefined autofill context clean up actions.
AutovalidateMode: Used to configure the auto validation of FormField and Form widgets.
Axis: The two cardinal directions in two dimensions.
AxisDirection: A direction along either the horizontal or vertical Axis in which the origin, or zero position, is determined.
BannerLocation: Where to show a Banner.
BlendMode: Algorithms to use when painting on the canvas.
BlurStyle: Styles to use for blurs in MaskFilter objects.
BoneButtonType: The type of button bone
BorderStyle: The style of line to draw for a BorderSide in a Border.
BorderType: The different supported BorderTypes
BoxFit: How a box should be inscribed into another box.
BoxShape: The shape to use when rendering a Border or BoxDecoration.
Brightness: Describes the contrast of a theme or color palette.
ButtonShape: Defines the shape style for button components.
CalendarItemType: Visual states for individual calendar date items.
CalendarSelectionMode: Selection modes available for calendar components.
CalendarValueLookup: Result type for calendar value lookup operations.
CalendarViewType: Defines the different view types available in calendar components.
CarouselAlignment: CarouselAlignment is used to align the carousel items.
ChangeReportingBehavior: The behavior of reporting the selected item index in a ListWheelScrollView.
CheckboxState: Represents the possible states of a checkbox widget.
Clip: Different ways to clip content.
ClipboardStatus: An enumeration of the status of the content on the user's clipboard.
ColorPickerMode
CompareType
ConjuredField
ConnectionState: The state of connection to an asynchronous computation.
ContextMenuButtonType: The buttons that can appear in a context menu by default.
ControlPointType: Defines the type of a control point in the gradient mask.
Country: This class represents a Country with its name, code, dialCode and flag.
CrossAxisAlignment: How the children should be placed along the cross axis in a flex layout.
CrossFadeState: Specifies which of two children to show. See AnimatedCrossFade.
DatePart
DateState: Represents the interactive state of a date in the calendar.
DecorationPosition: Where to paint a box decoration.
DiagnosticLevel: The various priority levels used to filter which diagnostics are shown and omitted.
DiagonalDragBehavior: Specifies how to configure the DragGestureRecognizers of a TwoDimensionalScrollable.
Direction
DismissDirection: The direction in which a Dismissible can be dismissed.
DurationPart
EdgeType: Represents the edge of a widget where the blur effect will be applied.
ExpandMode: Expansion behavior modes for toast notification stacks.
FilterQuality: Quality levels for image sampling in ImageFilter and Shader objects that sample images and for Canvas operations that render images.
FlexFit: How the child is inscribed into the available space.
FloatingHeaderSnapMode: Specifies how a partially visible SliverFloatingHeader animates into a view when a user scroll gesture ends.
FlutterLogoStyle: Possible ways to draw Flutter's logo.
FocusChangeReason
FocusHighlightMode: An enum to describe which kind of focus highlight behavior to use when displaying focus information.
FocusHighlightStrategy: An enum to describe how the current value of FocusManager.highlightMode is determined. The strategy is set on FocusManager.highlightStrategy.
FontStyle: Whether to use the italic type variation of glyphs in the font.
FormValidationMode: Defines when form field validation should occur during the component lifecycle.
GrowthDirection: The direction in which a sliver's contents are ordered, relative to the scroll offset axis.
HapticsType: Pass the HapticsType to Haptics.vibrate to trigger a haptic feedback.
HeroFlightDirection: Direction of the hero's flight based on the navigation operation.
HitTestBehavior: How to behave during hit tests.
HSLColorSliderType
HSVColorSliderType
ImageRepeat: How to paint any portions of a box not covered by an image.
ImageType
InputFeaturePosition
InspectorButtonVariant: Defines the visual and behavioral variants for an InspectorButton.
KeyEventResult: An enum that describes how to handle a key event handled by a FocusOnKeyCallback or FocusOnKeyEventCallback.
LiveTextInputStatus: An enumeration that indicates whether the current device is available for Live Text input.
LockState: Determines how the state of a lock key is used to accept a shortcut.
MainAxisAlignment: How the children should be placed along the main axis in a flex layout.
MainAxisSize: How much space should be occupied in the main axis.
Namespace: RFC4122 & RFC9562 provided namespaces for v3, v5, and v8 namespace based UUIDs
NavigationBarAlignment: Enumeration defining alignment options for navigation bar items.
NavigationContainerType: Enumeration defining the type of navigation container.
NavigationLabelPosition
NavigationLabelSize
NavigationLabelType
NavigationMode: Describes the navigation mode to be set by a MediaQuery widget.
NavigationOverflow
NavigationRailAlignment: Enumeration defining alignment options for navigation rail items.
OptionsViewOpenDirection: A direction in which to open the options-view overlay.
Orientation: Whether in portrait or landscape.
OverflowBarAlignment: Defines the horizontal alignment of OverflowBar children when they're laid out in an overflow column.
OverlayPosition
PaintingStyle: Strategies for painting shapes and paths on a canvas.
PanAxis: This enum is used to specify the behavior of the InteractiveViewer when the user drags the viewport.
PanelSibling: A sibling of a resizable panel.
PasswordPeekMode
PathFillType: Determines the winding rule that decides how the interior of a Path is calculated.
PathOperation: Strategies for combining paths.
PlaceholderAlignment: Where to vertically align the placeholder relative to the surrounding text.
PlatformProvidedMenuItemType: The list of possible platform provided, prebuilt menus for use in a PlatformMenuBar.
PopoverConstraint
PromptMode
PylonRouteType: Represents common route types for navigation methods in Pylon.
RenderComparison: The description of the difference between two objects, in the context of how it will affect the rendering.
RepeatMode: Defines how a repeated animation should behave when it reaches completion.
ResizeImagePolicy: Configures the behavior for ResizeImage.
RobotsName: Define enum options for Robots Name The robots meta tag lets you utilize a granular, page-specific approach to controlling how an individual page should be indexed and served to users in Google Search results. https://developers.google.com/search/docs/crawling-indexing/robots-meta-tag
RouteInformationReportingType: The Router's intention when it reports a new RouteInformation to the RouteInformationProvider.
RoutePopDisposition: Indicates whether the current route should be popped.
ScrollbarOrientation: An orientation along either the horizontal or vertical Axis.
ScrollDecelerationRate: The rate at which scroll momentum will be decelerated.
ScrollIncrementType: Describes the type of scroll increment that will be performed by a ScrollAction on a Scrollable.
ScrollPositionAlignmentPolicy: The policy to use when applying the alignment parameter of ScrollPosition.ensureVisible.
ScrollViewKeyboardDismissBehavior: A representation of how a ScrollView should dismiss the on-screen keyboard.
SelectableRegionSelectionStatus: The status of the selection under a SelectableRegion.
SelectionChangedCause: Indicates what triggered the change in selected text (including changes to the cursor location).
SelectionPosition
ShaderLayer
SliverPaintOrder: Specifies an order in which to paint the slivers of a Viewport.
SmartDashesType: Indicates how to handle the intelligent replacement of dashes in text input.
SmartQuotesType: Indicates how to handle the intelligent replacement of quotes in text input.
SnapshotMode: Controls how the SnapshotWidget paints its child.
SortDirection
StackFit: How to size the non-positioned children of a Stack.
StandardComponentType: An enum identifying standard UI components.
StepSize: Defines the size variants available for step indicators.
StepState: Represents the state of an individual step in a stepper.
StrokeCap: Styles to use for line endings.
StrokeJoin: Styles to use for line segment joins.
TableCellResizeMode
TableCellVerticalAlignment: Vertical alignment options for cells in RenderTable objects.
TargetPlatform: The platform that user interaction should adapt to target.
TextAffinity: A way to disambiguate a TextPosition when its offset could match two different locations in the rendered string.
TextAlign: Whether and how to align text horizontally.
TextBaseline: A horizontal line used for aligning text.
TextBoneBorderShape: Enum to define the type of border for text bones
TextDecorationStyle: The style in which to draw a text decoration
TextDirection: A direction in which text flows.
TextLeadingDistribution: How the "leading" is distributed over and under the text.
TextOverflow: How overflowing text should be handled.
TextSelectionHandleType: The type of selection handle to be displayed.
TextWidthBasis: The different ways of measuring the width of one or more lines of text.
ThemeMode
TileMode: Defines what happens at the edge of a gradient or the sampling of a source image in an ImageFilter.
TimePart
ToastLocation: Screen position enumeration for toast notification placement.
TraversalDirection: A direction along either the horizontal or vertical axes.
TraversalEdgeBehavior: Controls the focus transfer at the edges of a FocusScopeNode. For movement transfers (previous or next), the edge represents the first or last items. For directional transfers, the edge represents the outermost items of the FocusScopeNode, For example: for moving downwards, the edge node is the one with the largest bottom coordinate; for moving leftwards, the edge node is the one with the smallest x coordinate.
TriggerStage
TwitterCard: Define enum options for Twitter Card Only one card type per-page is supported. If more than one twitter:card value exists in the page, the “last” one in sequence will take priority. https://developer.twitter.com/en/docs/twitter-for-websites/cards/guides/getting-started
UnfocusDisposition: Describe what should happen after FocusNode.unfocus is called.
VertexMode: Defines how a list of points is interpreted when drawing a set of triangles.
VerticalDirection: A direction in which boxes flow vertically.
WebHtmlElementStrategy: The strategy for Image.network and NetworkImage to decide whether to display images in HTML elements contained in a platform view instead of fetching bytes.
WidgetInspectorServiceExtensions: Service extension constants for the Widget Inspector.
WidgetsServiceExtensions: Service extension constants for the widgets library.
WidgetState: Interactive states that some of the widgets can take on when receiving input from the user.
WrapAlignment: How Wrap should align objects.
WrapCrossAlignment: Who Wrap should align children within a run in the cross axis.

Mixins

AlwaysUpdateData: A mixin that always returns true for shouldNotify. Which means the data will always notify the listeners regardless of the changes.
AnimatedMixin
AnimateManager<T>: Provides a common interface for Animate and AnimateList to attach Effect extensions.
AnimationEagerListenerMixin: A mixin that replaces the didRegisterListener/didUnregisterListener contract with a dispose contract.
AnimationLazyListenerMixin: A mixin that helps listen to another object only when this object has registered listeners.
AnimationLocalListenersMixin: A mixin that implements the addListener/removeListener protocol and notifies all the registered listeners when notifyListeners is called.
AnimationLocalStatusListenersMixin: A mixin that implements the addStatusListener/removeStatusListener protocol and notifies all the registered listeners when notifyStatusListeners is called.
AnimationWithParentMixin<T>: Implements most of the Animation interface by deferring its behavior to a given parent Animation.
AutomaticKeepAliveClientMixin<T extends StatefulWidget>: A mixin with convenience methods for clients of AutomaticKeepAlive. It is used with State subclasses to manage keep-alive behavior in lazily built lists.
CachedValue
ChangesNotifierHelperMixin: A mixin that provides a way to notify listeners.
Choice<T>
ComponentController<T>: A mixin that defines the interface for controlling component values.
ControlledComponent<T>: A mixin that provides a standardized interface for controlled components.
DirectionalFocusTraversalPolicyMixin: A mixin class that provides an implementation for finding a node in a particular direction.
DistinctData: A mixin that provides a shouldNotify method to determine if the data has changed and should notify the listeners.
FormFieldHandle
FormValueSupplier<T, X extends StatefulWidget>
HookElement: An Element that uses a HookWidget as its configuration.
KeyedTabChild<T>
LocalHistoryRoute<T>: A mixin used by routes to handle back navigations internally by popping a list.
MenuSerializableShortcut: A mixin allowing a ShortcutActivator to provide data for serialization of the shortcut when sending to the platform.
ModelProperty<T>: A mixin for all kinds of Model properties.
MultiModelItem
NavigationContainerMixin
NotifiableElementMixin: Mixin this class to allow receiving Notification objects dispatched by child elements.
OverlayHandlerStateMixin<T extends StatefulWidget>
PaintingBinding: Binding for the painting library.
PopNavigatorRouterDelegateMixin<T>: A mixin that wires RouterDelegate.popRoute to the Navigator it builds.
RadioClient<T>: A client for a RadioGroupRegistry.
RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType extends RenderObject>: Generic mixin for RenderObjects created by an AbstractLayoutBuilder with the the same LayoutInfoType.
ResizablePaneController
RestorationMixin<S extends StatefulWidget>: Manages the restoration data for a State object of a StatefulWidget.
RootElementMixin: Mixin for the element at the root of the tree.
ScrollMetrics: A description of a Scrollable's contents, useful for modeling the state of its viewport.
SelectBase<T>
SelectPopupHandle
SingleTickerProviderStateMixin<T extends StatefulWidget>: Provides a single Ticker that is configured to only tick while the current tree is enabled, as defined by TickerMode.
SlottedContainerRenderObjectMixin<SlotType, ChildType extends RenderObject>: Mixin for a RenderObject configured by a SlottedMultiChildRenderObjectWidget.
SlottedMultiChildRenderObjectWidgetMixin<SlotType, ChildType extends RenderObject>: A mixin version of SlottedMultiChildRenderObjectWidget.
SubFocusScopeState
SubFocusState
TabChild
TextInput: Mixin widget used to avoid human error (e.g. missing properties) when implementing a TextField, ChipInput, TextArea, etc.
TextSelectionDelegate: A mixin for manipulating the selection, provided for toolbar or shortcut keys.
TextSelectionHandleControls: TextSelectionControls that specifically do not manage the toolbar in order to leave that to EditableText.contextMenuBuilder.
TickerProviderStateMixin<T extends StatefulWidget>: Provides Ticker objects that are configured to only tick while the current tree is enabled, as defined by TickerMode.
ToggleableStateMixin<S extends StatefulWidget>: A mixin for StatefulWidgets that implement toggleable controls with toggle animations (e.g. Switches, CupertinoSwitches, Checkboxes, CupertinoCheckboxes, Radios, and CupertinoRadios).
TreeSliverStateMixin<T>: A mixin for classes implementing a tree structure as expected by a TreeSliverController.
ViewportElementMixin: A mixin that allows Elements containing Viewport like widgets to correctly modify the notification depth of a ViewportNotificationMixin.
ViewportNotificationMixin: Mixin for Notifications that track how many RenderAbstractViewport they have bubbled through.
WidgetInspectorService: Service used by GUI tools to interact with the WidgetInspector.
WidgetsBinding: The glue between the widgets layer and the Flutter engine.
WindowHandle
WindowNavigatorHandle

Extension Types

OverlayChildLayoutInfo: The additional layout information available to the OverlayPortal.overlayChildLayoutBuilder callback.

Extensions

AlignEffectExtensions on T: Adds AlignEffect related extensions to AnimateManager.
AlignmentExtension on AlignmentGeometry
AnimateListExtensions on List<Widget>: Adds AnimateList related extensions to List<Widget>.
AnimateWidgetExtensions on Widget: Adds Animate related extensions to Widget.
AnimationControllerLoopExtensions on AnimationController: Adds a loop extension on AnimationController identical to repeat but adding a count parameter specifying how many times to repeat before stopping:
BlurEffectExtensions on T: Adds BlurEffect related extensions to AnimateManager.
BorderRadiusExtension on BorderRadiusGeometry
BoxShadowEffectExtensions on T: Adds BoxShadowEffect related extensions to AnimateManager.
BuildContextExtension on BuildContext
ButtonStyleExtension on AbstractButtonStyle
CalendarDateTime on DateTime
CallbackEffectExtensions on T: Adds CallbackEffect related extensions to AnimateManager.
ColorEffectExtension on T: Adds ColorEffect related extensions to AnimateManager.
ColorExtension on Color
ColumnExtension on Column
CrossfadeEffectExtensions on T: Adds CrossfadeEffect related extensions to AnimateManager.
CustomEffectExtensions on T: Adds CustomEffect related extensions to AnimateManager.
DecorationExtension on Decoration
DoubleExtension on double
EdgeInsetsExtension on EdgeInsetsGeometry
EffectExtensions on T: Adds Effect related extensions to AnimateManager.
ElevationEffectExtensions on T: Adds ElevationEffect related extensions to AnimateManager.
FadeEffectExtensions on T: Adds FadeEffect related extensions to AnimateManager.
FlexExtension on Flex
FlipEffectExtensions on T: Adds FlipEffect related extensions to AnimateManager.
FollowPathEffectExtensions on T: Adds FollowPathEffect related extensions to AnimateManager.
FormExtension on BuildContext
FormMapValuesExtension on FormMapValues
FutureOrExtension on FutureOr<T>
HSLColorExtension on HSLColor
HSVColorExtension on HSVColor
IconExtension on Widget
IntExtension on int
IterableExtension on Iterable<T>
Joinable on List<T>
ListenEffectExtensions on T: Adds ListenEffect related extensions to AnimateManager.
ListExtension on List<T>
MoveEffectExtensions on T: Adds MoveEffect related extensions to AnimateManager.
NumDurationExtensions on num: Adds extensions to num (ie. int & double) to make creating durations simple:
OffsetCopyWithExtensions on Offset: Adds a copyWith method to Offset.
OTPCodepointListExtension on OTPCodepointList
RotateEffectExtensions on T: Adds RotateEffect related extensions to AnimateManager.
RowExtension on Row
SafeLerpExtension on T? Function(T? a, T? b, double t)
SaturateEffectExtensions on T: Adds SaturateEffect related extensions to AnimateManager.
ScaleEffectExtensions on T: Adds ScaleEffect related extensions to AnimateManager.
ShaderEffectExtensions on T: Adds ShaderEffect related extensions to AnimateManager.
ShakeEffectExtensions on T: Adds ShakeEffect related extensions to AnimateManager.
ShapeDecorationExtension on ShapeDecoration
ShimmerEffectExtensions on T: Adds ShimmerEffect related extensions to AnimateManager.
SkeletonExtension on Widget: Extension methods for adding skeleton loading effects to any widget.
SlideEffectExtensions on T: Adds SlideEffect related extensions to AnimateManager.
StringCharacters on String
SwapEffectExtensions on T: Adds SwapEffect related extensions to AnimateManager.
TDouble on double
TextEditingControllerExtension on TextEditingController
TextEditingValueExtension on TextEditingValue
TextExtension on Widget
TFFuture on Future<T>
TFuture on Future<T>
ThenEffectExtensions on T: Adds ThenEffect related extensions to AnimateManager.
TInt on int
TintEffectExtensions on T: Adds TintEffect related extensions to AnimateManager.
TIterable on Iterable<T>
TIterableDouble on Iterable<double>
TIterableFuture on Iterable<Future<T>>
TIterableInt on Iterable<int>
TList on List<T>
TMap on Map<K, V>
TNFuture on Future<T?>
ToggleEffectExtensions on T: Adds ToggleEffect related extensions to AnimateManager.
TreeNodeListExtension on List<TreeNode<K>>
TSet on Set<T>
TString on String
ValueChangeNotifierExtension on ValueChangeNotifier<T>: Extension on ValueChangeNotifier to provide a read-only view and mapping.
ValueListenableExtension on ValueListenable<T>: Extension on ValueListenable to provide a read-only view and mapping.
ValueNotifierExtension on ValueNotifier<T>: Extension on ValueNotifier to provide a read-only view.
VisibilityEffectExtensions on T: Adds VisibilityEffect related extensions to AnimateManager.
WidgetExtension on Widget
WidgetStateExtension on Set<WidgetState>
WidgetStateOperators on WidgetStatesConstraint: These operators can be used inside a WidgetStateMap to combine states and find a match.
XColor on Color
XConjuredField on ConjuredField
XContextBeamPylon on BuildContext
XContextDismissOverlay on BuildContext
XContextPylon on BuildContext
XDataIntList on Uint8List
XDateTime on DateTime
XFloat64List on Float64List
XFuture on Future<T>
XIterableOffset on Iterable<Offset>
XIterableRect on Iterable<Rect>
XIterableWidget on Iterable<Widget>
XListConjured on List<T>
XNStream on Stream<T?>
XNum on num
XObject on Object
XOffset on Offset
XPath on Path
XPylonIterable on Iterable<T>
XPylonStream on Stream<T>
XRandom on Random
XRect on Rect
XSize on Size
XSStream on Stream<T>
XStream on Stream<T>
XStreamAcc on Stream<T>
XStreamList on List<Stream>
XStreamSemaphore on Stream<T>
XString on String
XWidget on Widget

Constants

factory → const _Factory: Used to annotate an instance or static method m. Indicates that m must either be abstract or must return a newly allocated object or null. In addition, every method that either implements or overrides m is implicitly annotated with this same annotation.
immutable → const Immutable: Used to annotate a class C. Indicates that C and all subtypes of C must be immutable.
kAlwaysCompleteAnimation → const Animation<double>: An animation that is always complete.
kAlwaysDismissedAnimation → const Animation<double>: An animation that is always dismissed.
kBackdropScaleDown → const double
kDefaultContentInsertionMimeTypes → const List<String>: The default mime types to be used when allowedMimeTypes is not provided.
kDefaultDuration → const Duration
kDefaultFontSize → const double: The default font size if none is specified.
kDefaultRouteDirectionalTraversalEdgeBehavior → const TraversalEdgeBehavior: The default value of Navigator.routeDirectionalTraversalEdgeBehavior.
kDefaultRouteTraversalEdgeBehavior → const TraversalEdgeBehavior: The default value of Navigator.routeTraversalEdgeBehavior.
kDefaultWindowConstraints → const BoxConstraints
kDoubleTapMinTime → const Duration
kLargeStepIndicatorSize → const double
kMaxScrollSpeed → const double
kMediumStepIndicatorSize → const double
kScrollDragSpeed → const double
kSmallStepIndicatorSize → const double
kSwitchDuration → const Duration: Standard duration for switch state transitions and animations.
kTextFieldHeight → const int
kTextHeightNone → const double: A TextStyle.height value that indicates the text span should take the height defined by the font, which may not be exactly the height of TextStyle.fontSize.
mustCallSuper → const _MustCallSuper: Used to annotate an instance member (method, getter, setter, operator, or field) m. Indicates that every invocation of a member that overrides m must also invoke m. In addition, every method that overrides m is implicitly annotated with this same annotation.
optionalTypeArgs → const _OptionalTypeArgs: Used to annotate a class, mixin, extension, function, method, or typedef declaration C. Indicates that any type arguments declared on C are to be treated as optional.
phiScaled → const double
protected → const _Protected: Used to annotate an instance member in a class or mixin which is meant to be visible only within the declaring library, and to other instance members of the class or mixin, and their subtypes.
required → const Required: Used to annotate a named parameter p in a method or function f. Indicates that every invocation of f must include an argument corresponding to p, despite the fact that p would otherwise be an optional parameter.
skeletonizerConfigData → const SkeletonizerConfigData: Singleton instance for skeletonizer theme configurations.
staticIconProvider → const Object: Annotation for classes that only provide static const IconData instances.
useTextEditingController → const _TextEditingControllerHookCreator: Creates a TextEditingController, either via an initial text or an initial TextEditingValue.
visibleForTesting → const _VisibleForTesting: Used to annotate a declaration that was made public, so that it is more visible than otherwise necessary, to make code testable.
widgetFactory → const _WidgetFactory: Annotation which marks a function as a widget factory for the purpose of widget creation tracking.

Properties

$conduitStreams ↔ List<BehaviorSubject>: getter/setter pair
charsetPalettes → Map<String, String>: final
cupertinoDesktopTextSelectionControls → TextSelectionControls: Text selection controls that follows MacOS design conventions.
final
cupertinoDesktopTextSelectionHandleControls → TextSelectionControls: Text selection handle controls that follow MacOS design conventions.
final
debugCaptureShaderWarmUpImage ↔ ShaderWarmUpImageCallback: Called by ShaderWarmUp.execute immediately after it creates an Image.
getter/setter pair
debugCaptureShaderWarmUpPicture ↔ ShaderWarmUpPictureCallback: Called by ShaderWarmUp.execute immediately after it creates a Picture.
getter/setter pair
debugDisableShadows ↔ bool: Whether to replace all shadows with solid color blocks.
getter/setter pair
debugEnhanceBuildTimelineArguments ↔ bool: Adds debugging information to Timeline events related to Widget builds.
getter/setter pair
debugFocusChanges ↔ bool: Setting to true will cause extensive logging to occur when focus changes occur.
getter/setter pair
debugHighlightDeprecatedWidgets ↔ bool: Show banners for deprecated widgets.
getter/setter pair
debugHotReloadHooksEnabled ↔ bool: Whether to behave like in release mode or allow hot-reload for hooks.
getter/setter pair
debugImageOverheadAllowance ↔ int: The number of bytes an image must use before it triggers inversion when debugInvertOversizedImages is true.
getter/setter pair
debugInvertOversizedImages ↔ bool: If true, the framework will color invert and horizontally flip images that have been decoded to a size taking at least debugImageOverheadAllowance bytes more than necessary.
getter/setter pair
debugNetworkImageHttpClientProvider ↔ HttpClientProvider?: Provider from which NetworkImage will get its HttpClient in debug builds.
getter/setter pair
debugOnPaintImage ↔ PaintImageCallback?: If not null, called when the framework is about to paint an Image to a Canvas with an ImageSizeInfo that contains the decoded size of the image as well as its output size.
getter/setter pair
debugOnRebuildDirtyWidget ↔ RebuildDirtyWidgetCallback?: Callback invoked for every dirty widget built each frame.
getter/setter pair
debugPrint ↔ DebugPrintCallback: Prints a message to the console, which you can access using the "flutter" tool's "logs" command ("flutter logs").
getter/setter pair
debugPrintBuildScope ↔ bool: Log all calls to BuildOwner.buildScope.
getter/setter pair
debugPrintGlobalKeyedWidgetLifecycle ↔ bool: Log when widgets with global keys are deactivated and log when they are reactivated (retaken).
getter/setter pair
debugPrintRebuildDirtyWidgets ↔ bool: Log the dirty widgets that are built each frame.
getter/setter pair
debugPrintScheduleBuildForStacks ↔ bool: Log the call stacks that mark widgets as needing to be rebuilt.
getter/setter pair
debugProfileBuildsEnabled ↔ bool: Adds Timeline events for every Widget built.
getter/setter pair
debugProfileBuildsEnabledUserWidgets ↔ bool: Adds Timeline events for every user-created Widget built.
getter/setter pair
emptyTextSelectionControls → TextSelectionControls: Text selection controls that do not show any toolbars or handles.
final
imageCache → ImageCache: The singleton that implements the Flutter framework's image cache.
no setter
primaryFocus → FocusNode?: Provides convenient access to the current FocusManager.primaryFocus from the WidgetsBinding instance.
no setter
pylonCodecs ↔ Map<Type, PylonCodec>: getter/setter pair

Functions

applyBoxFit(BoxFit fit, Size inputSize, Size outputSize) → FittedSizes: Apply a BoxFit value.
applyImageProperties(Uint8List list, ImageProperties props, ImageType type) → Future<Uint8List?>
axisDirectionIsReversed(AxisDirection axisDirection) → bool: Returns whether traveling along the given axis direction visits coordinates along that axis in numerically decreasing order.
axisDirectionToAxis(AxisDirection axisDirection) → Axis: Returns the Axis that contains the given AxisDirection.
basicLocaleListResolution(List<Locale>? preferredLocales, Iterable<Locale> supportedLocales) → Locale: The default locale resolution algorithm.
buildEditableTextContextMenu(BuildContext innerContext, EditableTextState editableTextState, [UndoHistoryController? undoHistoryController]) → Widget
buildOnSignal(String signal, WidgetBuilder builder) → Widget
buildTextSpanWithSpellCheckSuggestions(TextEditingValue value, bool composingWithinCurrentTextRange, TextStyle? style, TextStyle misspelledTextStyle, SpellCheckResults spellCheckResults) → TextSpan: Builds the TextSpan tree given the current state of the text input and spell check results.
childDragAnchorStrategy(Draggable<Object> draggable, BuildContext context, Offset position) → Offset: Display the feedback anchored at the position of the original child.
clearActiveTextInput() → void
closeDrawer<T>(BuildContext context, [T? result]) → Future<void>
closeOverlay<T>(BuildContext context, [T? value]) → Future<void>
closePopover<T>(BuildContext context, [T? result]) → Future<void>
closeSheet(BuildContext context) → Future<void>
colorSchemeContrastFilter(Map<String, Color> colors, double contrast) → Map<String, Color>
colorToHex(Color color, [bool showAlpha = true]) → String
combineKeyEventResults(Iterable<KeyEventResult> results) → KeyEventResult: Combine the results returned by multiple FocusOnKeyCallbacks or FocusOnKeyEventCallbacks.
combineSemanticsInfo(List<InlineSpanSemanticsInformation> infoList) → List<InlineSpanSemanticsInformation>: Combines _semanticsInfo entries where permissible.
contraintToNewText(TextEditingValue newValue, String newText) → TextSelection
createLocalImageConfiguration(BuildContext context, {Size? size}) → ImageConfiguration: Creates an ImageConfiguration based on the given BuildContext (and optionally size).
debugAssertAllPaintingVarsUnset(String reason, {bool debugDisableShadowsOverride = false}) → bool: Returns true if none of the painting library debug variables have been changed.
debugAssertAllWidgetVarsUnset(String reason) → bool: Returns true if none of the widget library debug variables have been changed.
debugCheckCanResolveTextDirection(TextDirection? direction, String target) → bool: Asserts that a given TextDirection is not null.
debugCheckHasDirectionality(BuildContext context, {String? why, String? hint, String? alternative}) → bool: Asserts that the given context has a Directionality ancestor.
debugCheckHasMediaQuery(BuildContext context) → bool: Asserts that the given context has a MediaQuery ancestor.
debugCheckHasOverlay(BuildContext context) → bool: Asserts that the given context has an Overlay ancestor.
debugCheckHasTable(BuildContext context) → bool: Asserts that the given context has a Table ancestor.
debugCheckHasWidgetsLocalizations(BuildContext context) → bool: Asserts that the given context has a Localizations ancestor that contains a WidgetsLocalizations delegate.
debugChildrenHaveDuplicateKeys(Widget parent, Iterable<Widget> children, {String? message}) → bool: Asserts if the given child list contains any duplicate non-null keys.
debugDescribeFocusTree() → String: Returns a text representation of the current focus tree, along with the current attributes on each node.
debugDescribeTransform(Matrix4? transform) → List<String>: Returns a list of strings representing the given transform in a format useful for TransformProperty.
debugDumpApp() → void: Print a string representation of the currently running app.
debugDumpFocusTree() → void: Prints a text representation of the current focus tree, along with the current attributes on each node.
debugDumpLayerTree() → void: Prints a textual representation of the layer trees.
debugDumpRenderTree() → void: Prints a textual representation of the render trees.
debugFlushLastFrameImageSizeInfo() → void: Flushes inter-frame tracking of image size information from paintImage.
debugIsLocalCreationLocation(Object object) → bool: Returns if an object is user created.
debugIsWidgetLocalCreation(Widget widget) → bool: Returns true if a Widget is user created.
debugItemsHaveDuplicateKeys(Iterable<Widget> items) → bool: Asserts if the given list of items contains any duplicate non-null keys.
debugPrintStack({StackTrace? stackTrace, String? label, int? maxFrames}) → void: Dump the stack to the console using debugPrint and FlutterError.defaultStackFilter.
debugTransformDebugCreator(Iterable<DiagnosticsNode> properties) → Iterable<DiagnosticsNode>: Transformer to parse and gather information about DiagnosticsDebugCreator.
debugWidgetBuilderValue(Widget widget, Widget? built) → void: Asserts that the built widget is not null.
decodeImageFromList(Uint8List bytes) → Future<Image>: Creates an image from a list of bytes.
defaultScrollNotificationPredicate(ScrollNotification notification) → bool: A ScrollNotificationPredicate that checks whether notification.depth == 0, which means that the notification did not bubble through any intervening scrolling widgets.
degToRad(double deg) → double
evaluate(Uint8List coef, int x) → int
flipAxis(Axis direction) → Axis: Returns the opposite of the given Axis.
flipAxisDirection(AxisDirection axisDirection) → AxisDirection: Returns the opposite of the given AxisDirection.
formatFileSize(int bytes, SizeUnitLocale unit) → String
gap(double gap, {double? crossGap}) → Widget
getAxisDirectionFromAxisReverseAndDirectionality(BuildContext context, Axis axis, bool reverse) → AxisDirection: Returns the AxisDirection in the given Axis in the current Directionality (or the reverse if reverse is true).
getBullet(BuildContext context, int depth, double size) → Widget
getWordAtCaret(String text, int caret, [String separator = ' ']) → WordInfo
goldenDegreeStream() → Iterable<double>
goldenPowerStream() → Iterable<double>
goldenRadianStream() → Iterable<double>
hexFromColor(Color color) → String
intentForMacOSSelector(String selectorName) → Intent?: Maps the selector from NSStandardKeyBindingResponding to the Intent if the selector is recognized.
invokeActionOnFocusedWidget(Intent intent) → (bool, Object?)
isMobile(TargetPlatform platform) → bool
join(Iterable<Widget> widgets, Widget separator) → Iterable<Widget>
lerpFontVariations(List<FontVariation>? a, List<FontVariation>? b, double t) → List<FontVariation>?: Interpolate between two lists of FontVariation objects.
maxDuration(Duration a, Duration b) → Duration
minDuration(Duration a, Duration b) → Duration
mutateSeparated<T>(List<T> source, List<T> separatedList, T separator) → void
onSignal(String signal, void callback()) → StreamSubscription<String>
openDrawer<T>({required BuildContext context, required WidgetBuilder builder, required OverlayPosition position, bool expands = false, bool draggable = true, bool barrierDismissible = true, WidgetBuilder? backdropBuilder, bool useSafeArea = true, bool? showDragHandle, BorderRadiusGeometry? borderRadius, Size? dragHandleSize, bool transformBackdrop = true, double? surfaceOpacity, double? surfaceBlur, Color? barrierColor, AnimationController? animationController, BoxConstraints? constraints, AlignmentGeometry? alignment}) → Future<T?>: Opens a drawer and returns a future that completes when dismissed.
openDrawerOverlay<T>({required BuildContext context, required WidgetBuilder builder, required OverlayPosition position, bool expands = false, bool draggable = true, bool barrierDismissible = true, WidgetBuilder? backdropBuilder, bool useSafeArea = true, bool? showDragHandle, BorderRadiusGeometry? borderRadius, Size? dragHandleSize, bool transformBackdrop = true, double? surfaceOpacity, double? surfaceBlur, Color? barrierColor, AnimationController? animationController, bool autoOpen = true, BoxConstraints? constraints, AlignmentGeometry? alignment}) → DrawerOverlayCompleter<T?>: Opens a drawer overlay with comprehensive customization options.
openRawDrawer<T>({Key? key, required BuildContext context, required DrawerBuilder builder, required OverlayPosition position, bool transformBackdrop = true, bool useRootDrawerOverlay = true, bool modal = true, Color? barrierColor, bool barrierDismissible = true, WidgetBuilder? backdropBuilder, bool useSafeArea = true, AnimationController? animationController, bool autoOpen = true, BoxConstraints? constraints, AlignmentGeometry? alignment}) → DrawerOverlayCompleter<T?>
openSheet<T>({required BuildContext context, required WidgetBuilder builder, required OverlayPosition position, bool barrierDismissible = true, bool transformBackdrop = false, Color? barrierColor, bool draggable = false, AnimationController? animationController, WidgetBuilder? backdropBuilder, BoxConstraints? constraints, AlignmentGeometry? alignment}) → Future<T?>: Opens a sheet and returns a future that completes when dismissed.
openSheetOverlay<T>({required BuildContext context, required WidgetBuilder builder, required OverlayPosition position, bool barrierDismissible = true, bool transformBackdrop = false, WidgetBuilder? backdropBuilder, Color? barrierColor, bool draggable = false, AnimationController? animationController, bool autoOpen = true, BoxConstraints? constraints, AlignmentGeometry? alignment}) → DrawerOverlayCompleter<T?>: Opens a sheet overlay with minimal styling and full-screen expansion.
optionallyResolveBorderRadius(BuildContext context, BorderRadiusGeometry? radius) → BorderRadius?
paintBorder(Canvas canvas, Rect rect, {BorderSide top = BorderSide.none, BorderSide right = BorderSide.none, BorderSide bottom = BorderSide.none, BorderSide left = BorderSide.none}) → void: Paints a border around the given rectangle on the canvas.
paintImage({required Canvas canvas, required Rect rect, required Image image, String? debugImageLabel, double scale = 1.0, double opacity = 1.0, ColorFilter? colorFilter, BoxFit? fit, Alignment alignment = Alignment.center, Rect? centerSlice, ImageRepeat repeat = ImageRepeat.noRepeat, bool flipHorizontally = false, bool invertColors = false, FilterQuality filterQuality = FilterQuality.medium, bool isAntiAlias = false, BlendMode blendMode = BlendMode.srcOver}) → void: Paints an image into the given rectangle on the canvas.
paintZigZag(Canvas canvas, Paint paint, Offset start, Offset end, int zigs, double width) → void: Draw a line between two points, which cuts diagonally back and forth across the line that connects the two points.
pickColorFromScreen(BuildContext context, [ColorHistoryStorage? storage]) → Future<Color?>
pointerDragAnchorStrategy(Draggable<Object> draggable, BuildContext context, Offset position) → Offset: Display the feedback anchored at the position of the touch that started the drag.
positionDependentBox({required Size size, required Size childSize, required Offset target, required bool preferBelow, double verticalOffset = 0.0, double margin = 10.0}) → Offset: Position a child box within a container box, either above or below a target point.
precacheImage(ImageProvider<Object> provider, BuildContext context, {Size? size, ImageErrorListener? onError}) → Future<void>: Prefetches an image into the image cache.
precisionProfile(SyncVoidCallbackR cb) → double
precisionProfileAsync(AsyncVoidCallbackR cb) → Future<double>
precisionProfileAsyncResult<T>(AsyncVoidCallbackR<T> cb, {String? tag, ProfileReporterCallback? reporter}) → Future<T>
precisionProfileResult<T>(SyncVoidCallbackR<T> cb, {String? tag, ProfileReporterCallback? reporter}) → T
pushSignal(String signal) → void
pylonBeamerBuilder(BuildContext context, Widget widget) → Widget
radToDeg(double rad) → double
randomBool() → dynamic
randomDouble() → dynamic
registerPylonCodec<T extends PylonCodec>(T codec) → void
removeThrottle(String id) → ThrottleFunction?
replaceWordAtCaret(String text, int caret, String replacement, [String separator = ' ']) → ReplacementInfo
runWidget(Widget app) → void: Inflate the given widget and bootstrap the widget tree.
shortcutActivatorToKeySet(ShortcutActivator activator) → List<LogicalKeyboardKey>
showItemPicker<T>(BuildContext context, {required ItemChildDelegate<T> items, required ItemPickerBuilder<T> builder, T? initialValue, ItemPickerLayout layout = const GridItemPickerLayout(), AlignmentGeometry? alignment, AlignmentGeometry? anchorAlignment, BoxConstraints? constraints, Offset? offset, Widget? title}) → Future<T?>
showItemPickerDialog<T>(BuildContext context, {required ItemChildDelegate<T> items, required ItemPickerBuilder<T> builder, ItemPickerLayout layout = const GridItemPickerLayout(), T? initialValue, BoxConstraints? constraints, required Widget title}) → Future<T?>
styleValue<T>({T? widgetValue, T? themeValue, required T defaultValue}) → T: A style helper function that returns the value from the widget, theme, or default value.
subtractByBorder(BorderRadius radius, double borderWidth) → BorderRadius
swapItemInLists<T>(List<List<T>> lists, T element, List<T> targetList, int targetIndex) → void
textDirectionToAxisDirection(TextDirection textDirection) → AxisDirection: Returns the AxisDirection in which reading occurs in the given TextDirection.
throttle(String id, ThrottleCallback runner, {bool leaky = false, Duration cooldown = const Duration(milliseconds: 250)}) → void
timelineMaxDuration(Iterable<TimelineAnimation> timelines) → Duration
tweenValue<T>(T begin, T end, double t) → T
unlerpDouble(double value, double min, double max) → double
use<R>(Hook<R> hook) → R: Registers a Hook and returns its value.
useAnimation<T>(Animation<T> animation) → T: Subscribes to an Animation and returns its value.
useAnimationController({Duration? duration, Duration? reverseDuration, String? debugLabel, double initialValue = 0, double lowerBound = 0, double upperBound = 1, TickerProvider? vsync, AnimationBehavior animationBehavior = AnimationBehavior.normal, List<Object?>? keys}) → AnimationController: Creates an AnimationController and automatically disposes it when necessary.
useAppLifecycleState() → AppLifecycleState?: Returns the current AppLifecycleState value and rebuilds the widget when it changes.
useAutomaticKeepAlive({bool wantKeepAlive = true}) → void: Mark a widget using this hook as needing to stay alive even when it's in a lazy list that would otherwise remove it.
useCallback<T extends Function>(T callback, [List<Object?> keys = const <Object>[]]) → T: Cache a function across rebuilds based on a list of keys.
useCarouselController({int initialItem = 0, List<Object?>? keys}) → CarouselController: Creates a CarouselController that will be disposed automatically.
useContext() → BuildContext: Obtains the BuildContext of the building HookWidget.
useCupertinoTabController({int initialIndex = 0, List<Object?>? keys}) → CupertinoTabController: Creates a CupertinoTabController that will be disposed automatically.
useDebounced<T>(T toDebounce, Duration timeout) → T?: Returns a debounced version of the provided value toDebounce, triggering widget updates accordingly after a specified timeout duration.
useDraggableScrollableController({List<Object?>? keys}) → DraggableScrollableController: Creates a DraggableScrollableController that will be disposed automatically.
useEffect(Dispose? effect(), [List<Object?>? keys]) → void: Useful for side-effects and optionally canceling them.
useExpansibleController({List<Object?>? keys}) → ExpansibleController: Creates a ExpansibleController that will be disposed automatically.
useExpansionTileController({List<Object?>? keys}) → ExpansionTileController: Creates a ExpansionTileController that will be disposed automatically.
useFixedExtentScrollController({int initialItem = 0, ScrollControllerCallback? onAttach, ScrollControllerCallback? onDetach, List<Object?>? keys}) → FixedExtentScrollController: Creates FixedExtentScrollController that will be disposed automatically.
useFocusNode({String? debugLabel, FocusOnKeyEventCallback? onKeyEvent, bool skipTraversal = false, bool canRequestFocus = true, bool descendantsAreFocusable = true, bool descendantsAreTraversable = true}) → FocusNode: Creates an automatically disposed FocusNode.
useFocusScopeNode({String? debugLabel, FocusOnKeyEventCallback? onKeyEvent, bool skipTraversal = false, bool canRequestFocus = true}) → FocusScopeNode: Creates an automatically disposed FocusScopeNode.
useFuture<T>(Future<T>? future, {T? initialData, bool preserveState = true}) → AsyncSnapshot<T>: Subscribes to a Future and returns its current state as an AsyncSnapshot.
useIsMounted() → IsMounted: Returns an IsMounted object that you can use to check if the State is mounted.
useListenable<T extends Listenable?>(T listenable) → T: Subscribes to a Listenable and marks the widget as needing build whenever the listener is called.
useListenableSelector<R>(Listenable? listenable, R selector()) → R: Rebuild only when there is a change in the selector result.
useMemoized<T>(T valueBuilder(), [List<Object?> keys = const <Object>[]]) → T: Caches the instance of a complex object.
useOnAppLifecycleStateChange(LifecycleCallback? onStateChanged) → void: Listens to the AppLifecycleState.
useOnListenableChange(Listenable? listenable, VoidCallback listener) → void: Adds a given listener to a Listenable and removes it when the hook is disposed.
useOnPlatformBrightnessChange(BrightnessCallback onBrightnessChange) → void: Listens to the platform Brightness.
useOnStreamChange<T>(Stream<T>? stream, {void onData(T event)?, void onError(Object error, StackTrace stackTrace)?, void onDone()?, bool? cancelOnError}) → StreamSubscription<T>?: Subscribes to a Stream and calls the Stream.listen to register the onData, onError, and onDone.
useOverlayPortalController({List<Object?>? keys}) → OverlayPortalController: Creates a OverlayPortalController that will be disposed automatically.
usePageController({int initialPage = 0, bool keepPage = true, double viewportFraction = 1.0, ScrollControllerCallback? onAttach, ScrollControllerCallback? onDetach, List<Object?>? keys}) → PageController: Creates a PageController that will be disposed automatically.
usePlatformBrightness() → Brightness: Returns the current platform Brightness value and rebuilds the widget when it changes.
usePrevious<T>(T val) → T?: Returns the previous value passed to usePrevious (from the previous widget build).
useReassemble(VoidCallback callback) → void: Runs the callback on every hot reload, similar to reassemble in the stateful widgets.
useReducer<StateT, ActionT>(Reducer<StateT, ActionT> reducer, {required StateT initialState, required ActionT initialAction}) → Store<StateT, ActionT>: An alternative to useState for more complex states.
useRef<T>(T initialValue) → ObjectRef<T>: Creates an object that contains a single mutable property.
useScrollController({double initialScrollOffset = 0.0, bool keepScrollOffset = true, String? debugLabel, ScrollControllerCallback? onAttach, ScrollControllerCallback? onDetach, List<Object?>? keys}) → ScrollController: Creates ScrollController that will be disposed automatically.
useSearchController({List<Object?>? keys}) → SearchController: Creates a SearchController that will be disposed automatically.
useSingleTickerProvider({List<Object?>? keys}) → TickerProvider: Creates a single usage TickerProvider.
useSnapshotController({bool allowSnapshotting = false}) → SnapshotController: Creates and disposes a SnapshotController.
useState<T>(T initialData) → ValueNotifier<T>: Creates a variable and subscribes to it.
useStream<T>(Stream<T>? stream, {T? initialData, bool preserveState = true}) → AsyncSnapshot<T>: Subscribes to a Stream and returns its current state as an AsyncSnapshot.
useStreamController<T>({bool sync = false, VoidCallback? onListen, VoidCallback? onCancel, List<Object?>? keys}) → StreamController<T>: Creates a StreamController which is automatically disposed when necessary.
useTabController({required int initialLength, Duration? animationDuration = kTabScrollDuration, TickerProvider? vsync, int initialIndex = 0, List<Object?>? keys}) → TabController: Creates a TabController that will be disposed automatically.
useTransformationController({Matrix4? initialValue, List<Object?>? keys}) → TransformationController: Creates and disposes a TransformationController.
useTreeSliverController() → TreeSliverController: Creates a TreeSliverController that will be disposed automatically.
useValueChanged<T, R>(T value, R? valueChange(T oldValue, R? oldResult)) → R?: Watches a value and triggers a callback whenever the value changed.
useValueListenable<T>(ValueListenable<T> valueListenable) → T: Subscribes to a ValueListenable and returns its value.
useValueNotifier<T>(T initialData, [List<Object?>? keys]) → ValueNotifier<T>: Creates a ValueNotifier that is automatically disposed.
useWidgetStatesController({Set<WidgetState>? values, List<Object?>? keys}) → WidgetStatesController: Creates a WidgetStatesController that will be disposed automatically.
wrapDouble(double value, double min, double max) → double

Typedefs

ActionListenerCallback = void Function(Action<Intent> action): The kind of callback that an Action uses to notify of changes to the action's state.
AnimatableCallback<T> = T Function(double value): A typedef used by Animatable.fromCallback to create an Animatable from a callback.
AnimateCallback = void Function(AnimationController controller): Function signature for Animate callbacks.
AnimatedChildBuilder<T> = Widget Function(BuildContext context, T value, Widget? child): A callback that builds a widget based on an animated value and optional child.
AnimatedChildValueBuilder<T> = Widget Function(BuildContext context, T oldValue, T newValue, double t, Widget? child): A callback that builds a widget with raw animation progress information.
AnimatedCrossFadeBuilder = Widget Function(Widget topChild, Key topChildKey, Widget bottomChild, Key bottomChildKey): Signature for the AnimatedCrossFade.layoutBuilder callback.
AnimatedItemBuilder = Widget Function(BuildContext context, int index, Animation<double> animation): Signature for the builder callback used by AnimatedList, AnimatedList.separated & AnimatedGrid to build their animated children.
AnimatedRemovedItemBuilder = Widget Function(BuildContext context, Animation<double> animation): Signature for the builder callback used in AnimatedListState.removeItem and AnimatedGridState.removeItem to animate their children after they have been removed.
AnimatedSwitcherLayoutBuilder = Widget Function(Widget? currentChild, List<Widget> previousChildren): Signature for builders used to generate custom layouts for AnimatedSwitcher.
AnimatedSwitcherTransitionBuilder = Widget Function(Widget child, Animation<double> animation): Signature for builders used to generate custom transitions for AnimatedSwitcher.
AnimatedTransitionBuilder = Widget Function(BuildContext context, Animation<double> animation, Widget? child): Builder callback used by DualTransitionBuilder.
AnimationBuilder<T> = Widget Function(BuildContext context, Animation<T> animation): A callback that builds a widget based on an animation object.
AnimationStatusListener = void Function(AnimationStatus status): Signature for listeners attached using Animation.addStatusListener.
AppExitRequestCallback = Future<AppExitResponse> Function(): A callback type that is used by AppLifecycleListener.onExitRequested to ask the application if it wants to cancel application termination or not.
AppPrivateCommandCallback = void Function(String action, Map<String, dynamic> data): Signature for the callback that reports the app private command results.
AsyncVoidCallback<T> = Future<void> Function()
AsyncVoidCallbackR<T> = Future<T> Function()
AsyncWidgetBuilder<T> = Widget Function(BuildContext context, AsyncSnapshot<T> snapshot): Signature for strategies that build widgets based on asynchronous interaction.
AutoCompleteCompleter = String Function(String suggestion): Function signature for customizing how autocomplete suggestions are applied.
AutocompleteFieldViewBuilder = Widget Function(BuildContext context, TextEditingController textEditingController, FocusNode focusNode, VoidCallback onFieldSubmitted): The type of the Autocomplete callback which returns the widget that contains the input TextField or TextFormField.
AutoCompleteKey = FormKey<String>
AutocompleteOnSelected<T extends Object> = void Function(T option): The type of the callback used by the RawAutocomplete widget to indicate that the user has selected an option.
AutocompleteOptionsBuilder<T extends Object> = FutureOr<Iterable<T>> Function(TextEditingValue textEditingValue): The type of the RawAutocomplete callback which computes the list of optional completions for the widget's field, based on the text the user has entered so far.
AutocompleteOptionsViewBuilder<T extends Object> = Widget Function(BuildContext context, AutocompleteOnSelected<T> onSelected, Iterable<T> options): The type of the RawAutocomplete callback which returns a Widget that displays the specified options and calls onSelected if the user selects an option.
AutocompleteOptionToString<T extends Object> = String Function(T option): The type of the RawAutocomplete callback that converts an option value to a string which can be displayed in the widget's options menu.
BackdropBuilder = Widget Function(BuildContext context, Widget child, Animation<double> animation, int stackIndex)
BarrierBuilder = Widget? Function(BuildContext context, Widget child, Animation<double> animation, int stackIndex)
BinaryOperator<T> = T Function(T a, T b)
BoxConstraintsTransform = BoxConstraints Function(BoxConstraints constraints): Signature for a function that transforms a BoxConstraints to another BoxConstraints.
BrightnessCallback = FutureOr<void> Function(Brightness previous, Brightness current): A callback triggered when the platform brightness changes.
ButtonStateProperty<T> = T Function(BuildContext context, Set<WidgetState> states)
ButtonStatePropertyDelegate<T> = T Function(BuildContext context, Set<WidgetState> states, T value)
CarouselItemBuilder = Widget Function(BuildContext context, int index): Builds a carousel item. The index is the index of the item.
CellPredicate = bool Function(int index, int span)
CheckboxKey = FormKey<CheckboxState>
ChildIndexGetter = int? Function(Key key): Called to find the new index of a child based on its key in case of reordering.
ChipInputKey<T> = FormKey<List<T>>
ChipWidgetBuilder<T> = Widget Function(BuildContext context, T chip): Function signature for building custom chip widgets in chip input fields.
CodepointPredicate = bool Function(int codepoint)
CodepointUnaryOperator = int Function(int codepoint)
ColorPickerKey = FormKey<Color>
CommandBuilder = Stream<List<Widget>> Function(BuildContext context, String? query)
ConditionalElementVisitor = bool Function(Element element): Signature for the callback to BuildContext.visitAncestorElements.
ConfirmDismissCallback = Future<bool?> Function(DismissDirection direction): Signature used by Dismissible to give the application an opportunity to confirm or veto a dismiss gesture.
ContextedCallback = void Function(BuildContext context)
ContextedValueChanged<T> = void Function(BuildContext context, T value)
Convert<F, T> = T Function(F value)
CreatePlatformViewCallback = PlatformViewController Function(PlatformViewCreationParams params): Constructs a PlatformViewController.
CreateRectTween = Tween<Rect?> Function(Rect? begin, Rect? end): Signature for a function that takes two Rect instances and returns a RectTween that transitions between them.
CustomEffectBuilder = Widget Function(BuildContext context, double value, Widget child)
DataWidgetBuilder<T> = Widget Function(BuildContext context, T data, Widget? child): A widget builder that receives the data from the ancestor Data widget.
DateInputKey = FormKey<DateTime>
DatePickerKey = FormKey<DateTime>
DateStateBuilder = DateState Function(DateTime date): Callback function type for determining the state of calendar dates.
DebounceCallback<T> = FutureOr<T> Function(): A callback to be debounced or throttled.
DebounceErrorConsumer = void Function(Object error, StackTrace stackTrace): A callback to be called when the debounced or throttled callback throws an error.
DebounceResultConsumer<T> = void Function(T value): A callback to be called when the debounced or throttled callback is called.
DecoderBufferCallback = Future<Codec> Function(ImmutableBuffer buffer, {bool allowUpscaling, int? cacheHeight, int? cacheWidth}): Performs the decode process for use in ImageProvider.loadBuffer.
DelegatedTransitionBuilder = Widget? Function(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, bool allowSnapshotting, Widget? child): Signature for a builder used to control a page's exit transition.
DensityModifier = EdgeInsets Function(EdgeInsets padding): A function that modifies button padding based on density requirements.
DidRemovePageCallback = void Function(Page<Object?> page): Signature for the Navigator.onDidRemovePage callback.
DismissDirectionCallback = void Function(DismissDirection direction): Signature used by Dismissible to indicate that it has been dismissed in the given direction.
DismissUpdateCallback = void Function(DismissUpdateDetails details): Signature used by Dismissible to indicate that the dismissible has been dragged.
Dispose = void Function(): A function called when the state of a widget is destroyed.
DotBuilder = Widget Function(BuildContext context, int index, bool active)
DragAnchorStrategy = Offset Function(Draggable<Object> draggable, BuildContext context, Offset position): Signature for the strategy that determines the drag start point of a Draggable.
DragEndCallback = void Function(DraggableDetails details): Signature for when the draggable is dropped.
DraggableCanceledCallback = void Function(Velocity velocity, Offset offset): Signature for when a Draggable is dropped without being accepted by a DragTarget.
DragTargetAccept<T> = void Function(T data): Signature for causing a DragTarget to accept the given data.
DragTargetAcceptWithDetails<T> = void Function(DragTargetDetails<T> details): Signature for determining information about the acceptance by a DragTarget.
DragTargetBuilder<T> = Widget Function(BuildContext context, List<T?> candidateData, List rejectedData): Signature for building children of a DragTarget.
DragTargetLeave<T> = void Function(T? data): Signature for when a Draggable leaves a DragTarget.
DragTargetMove<T> = void Function(DragTargetDetails<T> details): Signature for when a Draggable moves within a DragTarget.
DragTargetWillAccept<T> = bool Function(T? data): Signature for determining whether the given data will be accepted by a DragTarget.
DragTargetWillAcceptWithDetails<T> = bool Function(DragTargetDetails<T> details): Signature for determining whether the given data will be accepted by a DragTarget, based on provided information.
DragUpdateCallback = void Function(DragUpdateDetails details): Signature for when a Draggable is dragged across the screen.
DrawerBuilder = Widget Function(BuildContext context, Size extraSize, Size size, EdgeInsets padding, int stackIndex): Builder function signature for drawer content.
DurationInputKey = FormKey<Duration>
DurationPickerKey = FormKey<Duration>
EditableTextContextMenuBuilder = Widget Function(BuildContext context, EditableTextState editableTextState): Signature for a widget builder that builds a context menu for the given EditableTextState.
ElementCreatedCallback = void Function(Object element): The signature of the function that gets called when the HtmlElementView DOM element is created.
ElementVisitor = void Function(Element element): Signature for the callback to BuildContext.visitChildElements.
ErrorWidgetBuilder = Widget Function(BuildContext context, Object error, StackTrace? stackTrace)
ExitWidgetSelectionButtonBuilder = Widget Function(BuildContext context, {required GlobalKey<State<StatefulWidget>> key, required VoidCallback onPressed, required String semanticsLabel}): Signature for the builder callback used by WidgetInspector.exitWidgetSelectionButtonBuilder.
ExpansibleBuilder = Widget Function(BuildContext context, Widget header, Widget body, Animation<double> animation): The type of the callback that uses the header and body of an Expansible widget to build the widget.
ExpansibleComponentBuilder = Widget Function(BuildContext context, Animation<double> animation): The type of the callback that returns the header or body of an Expansible.
FocusOnKeyCallback = KeyEventResult Function(FocusNode node, RawKeyEvent event): Signature of a callback used by Focus.onKey and FocusScope.onKey to receive key events.
FocusOnKeyEventCallback = KeyEventResult Function(FocusNode node, KeyEvent event): Signature of a callback used by Focus.onKeyEvent and FocusScope.onKeyEvent to receive key events.
FormattedInputPopupBuilder<T> = Widget Function(BuildContext context, ComponentController<T?> controller)
FormFieldBuilder<T> = Widget Function(FormFieldState<T> field): Signature for building the widget representing the form field.
FormFieldErrorBuilder = Widget Function(BuildContext context, String errorText): Signature for a callback that builds an error widget.
FormFieldSetter<T> = void Function(T? newValue): Signature for being notified when a form field changes value.
FormFieldValidator<T> = String? Function(T? value): Signature for validating a form field.
FormMapValues = Map<FormKey, dynamic>
FormPendingWidgetBuilder = Widget Function(BuildContext context, Map<FormKey, Future<ValidationResult?>> errors, Widget? child)
FormSubmitCallback = void Function(BuildContext context, FormMapValues values)
FutureOrWidgetBuilder<T> = Widget Function(BuildContext context, AsyncSnapshot<T> snapshot)
FuturePredicate<T> = FutureOr<bool> Function(T? value): A function type that evaluates a condition on a value and returns a boolean result.
FutureVoidCallback = Future<void> Function()
FutureWidgetBuilderCallback<T> = Widget Function(BuildContext context, T value): A callback to be called when the future is completed with a value.
FutureWidgetBuilderEmptyCallback = Widget Function(BuildContext context): A callback to be called when the future is completed with no data.
FutureWidgetBuilderErrorCallback = Widget Function(BuildContext context, Object error, StackTrace stackTrace): A callback to be called when the future is completed with an error.
FutureWidgetBuilderLoadingCallback = Widget Function(BuildContext context): A callback to be called when the future is still loading.
GenerateAppTitle = String Function(BuildContext context): The signature of WidgetsApp.onGenerateTitle.
GestureDragCancelCallback = void Function(): Signature for when the pointer that previously triggered a GestureDragDownCallback did not complete.
GestureDragDownCallback = void Function(DragDownDetails details): Signature for when a pointer has contacted the screen and might begin to move.
GestureDragEndCallback = void Function(DragEndDetails details): Signature for when a pointer that was previously in contact with the screen and moving is no longer in contact with the screen.
GestureDragStartCallback = void Function(DragStartDetails details): Signature for when a pointer has contacted the screen and has begun to move.
GestureDragUpdateCallback = void Function(DragUpdateDetails details): Signature for when a pointer that is in contact with the screen and moving has moved again.
GestureForcePressEndCallback = void Function(ForcePressDetails details): Signature for when the pointer that previously triggered a ForcePressGestureRecognizer.onStart callback is no longer in contact with the screen.
GestureForcePressPeakCallback = void Function(ForcePressDetails details): Signature used by ForcePressGestureRecognizer for when a pointer that has pressed with at least ForcePressGestureRecognizer.peakPressure.
GestureForcePressStartCallback = void Function(ForcePressDetails details): Signature used by a ForcePressGestureRecognizer for when a pointer has pressed with at least ForcePressGestureRecognizer.startPressure.
GestureForcePressUpdateCallback = void Function(ForcePressDetails details): Signature used by ForcePressGestureRecognizer during the frames after the triggering of a ForcePressGestureRecognizer.onStart callback.
GestureLongPressCallback = void Function(): Callback signature for LongPressGestureRecognizer.onLongPress.
GestureLongPressEndCallback = void Function(LongPressEndDetails details): Callback signature for LongPressGestureRecognizer.onLongPressEnd.
GestureLongPressMoveUpdateCallback = void Function(LongPressMoveUpdateDetails details): Callback signature for LongPressGestureRecognizer.onLongPressMoveUpdate.
GestureLongPressStartCallback = void Function(LongPressStartDetails details): Callback signature for LongPressGestureRecognizer.onLongPressStart.
GestureLongPressUpCallback = void Function(): Callback signature for LongPressGestureRecognizer.onLongPressUp.
GestureRecognizerFactoryConstructor<T extends GestureRecognizer> = T Function(): Signature for closures that implement GestureRecognizerFactory.constructor.
GestureRecognizerFactoryInitializer<T extends GestureRecognizer> = void Function(T instance): Signature for closures that implement GestureRecognizerFactory.initializer.
GestureScaleEndCallback = void Function(ScaleEndDetails details): Signature for when the pointers are no longer in contact with the screen.
GestureScaleStartCallback = void Function(ScaleStartDetails details): Signature for when the pointers in contact with the screen have established a focal point and initial scale of 1.0.
GestureScaleUpdateCallback = void Function(ScaleUpdateDetails details): Signature for when the pointers in contact with the screen have indicated a new focal point and/or scale.
GestureTapCallback = void Function(): Signature for when a tap has occurred.
GestureTapCancelCallback = void Function(): Signature for when the pointer that previously triggered a GestureTapDownCallback will not end up causing a tap.
GestureTapDownCallback = void Function(TapDownDetails details): Signature for when a pointer that might cause a tap has contacted the screen.
GestureTapUpCallback = void Function(TapUpDetails details): Signature for when a pointer that will trigger a tap has stopped contacting the screen.
HeroFlightShuttleBuilder = Widget Function(BuildContext flightContext, Animation<double> animation, HeroFlightDirection flightDirection, BuildContext fromHeroContext, BuildContext toHeroContext): A function that lets Heroes self supply a Widget that is shown during the hero's flight from one route to another instead of default (which is to show the destination route's instance of the Hero).
HeroPlaceholderBuilder = Widget Function(BuildContext context, Size heroSize, Widget child): Signature for a function that builds a Hero placeholder widget given a child and a Size.
HttpClientProvider = HttpClient Function(): Signature for a method that returns an HttpClient.
ImageChunkListener = void Function(ImageChunkEvent event): Signature for listening to ImageChunkEvent events.
ImageDecoderCallback = Future<Codec> Function(ImmutableBuffer buffer, {TargetImageSizeCallback? getTargetSize}): Performs the decode process for use in ImageProvider.loadImage.
ImageErrorListener = void Function(Object exception, StackTrace? stackTrace): Signature for reporting errors when resolving images.
ImageErrorWidgetBuilder = Widget Function(BuildContext context, Object error, StackTrace? stackTrace): Signature used by Image.errorBuilder to create a replacement widget to render instead of the image.
ImageFrameBuilder = Widget Function(BuildContext context, Widget child, int? frame, bool wasSynchronouslyLoaded): Signature used by Image.frameBuilder to control the widget that will be used when an Image is built.
ImageListener = void Function(ImageInfo image, bool synchronousCall): Signature for callbacks reporting that an image is available.
ImageLoadingBuilder = Widget Function(BuildContext context, Widget child, ImageChunkEvent? loadingProgress): Signature used by Image.loadingBuilder to build a representation of the image's loading progress.
IndexedWidgetBuilder = Widget Function(BuildContext context, int index): Signature for a function that creates a widget for a given index, e.g., in a list.
InitialRouteListFactory = List<Route> Function(String initialRoute): The signature of WidgetsApp.onGenerateInitialRoutes.
InlineSpanVisitor = bool Function(InlineSpan span): Called on each span as InlineSpan.visitChildren walks the InlineSpan tree.
InputKey = FormKey<String>
InputOTPKey = FormKey<List<int?>>
InspectorSelectionChangedCallback = void Function(): Signature for the selection change callback used by WidgetInspectorService.selectionChangedCallback.
InteractiveViewerWidgetBuilder = Widget Function(BuildContext context, Quad viewport): A signature for widget builders that take a Quad of the current viewport.
IntrinsicComputer = double Function(RenderBox child, double extent)
IsMounted = bool Function(): Used by useIsMounted to allow widgets to determine if the Widget is still in the widget tree or not.
ItemPickerBuilder<T> = Widget Function(BuildContext context, T item)
KeyboardShortcutDisplayBuilder = Widget Function(BuildContext context, LogicalKeyboardKey key)
LayoutWidgetBuilder = Widget Function(BuildContext context, BoxConstraints constraints): The signature of the LayoutBuilder builder function.
LifecycleCallback = FutureOr<void> Function(AppLifecycleState? previous, AppLifecycleState current): A callback triggered when the app life cycle changes.
ListChangeListener<T> = void Function(ListChangeDetails<T> details): A callback that receives a ListChangeDetails object.
LocaleListResolutionCallback = Locale? Function(List<Locale>? locales, Iterable<Locale> supportedLocales): The signature of WidgetsApp.localeListResolutionCallback.
LocaleResolutionCallback = Locale? Function(Locale? locale, Iterable<Locale> supportedLocales): The signature of WidgetsApp.localeResolutionCallback.
MagnifierBuilder = Widget? Function(BuildContext context, MagnifierController controller, ValueNotifier<MagnifierInfo> magnifierInfo): Signature for a builder that builds a Widget with a MagnifierController.
MapChangeListener<K, V> = void Function(MapChangeDetails<K, V> details): A callback that receives a MapChangeDetails object.
MenuItemSerializableIdGenerator = int Function(PlatformMenuItem item): The signature for a function that generates unique menu item IDs for serialization of a PlatformMenuItem.
ModelWidgetBuilder<T> = Widget Function(BuildContext context, ModelProperty<T> model, Widget? child): A callback that takes the model and returns a widget.
MoveExitWidgetSelectionButtonBuilder = Widget Function(BuildContext context, {required VoidCallback onPressed, required String semanticsLabel, bool usesDefaultAlignment}): Signature for the builder callback used by WidgetInspector.moveExitWidgetSelectionButtonBuilder.
MultipleAnswerKey<T> = FormKey<Iterable<T>>
MultipleChoiceKey<T> = FormKey<T>
MultiSelectKey<T> = FormKey<Iterable<T>>
NavigationWidgetBuilder = Widget Function(BuildContext context, bool selected)
NavigatorFinderCallback = NavigatorState Function(BuildContext context): A callback that given a BuildContext finds a NavigatorState.
NestedScrollViewHeaderSliversBuilder = List<Widget> Function(BuildContext context, bool innerBoxIsScrolled): Signature used by NestedScrollView for building its header.
NeverWidgetBuilder = Widget Function([dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic, dynamic])
NotificationListenerCallback<T extends Notification> = bool Function(T notification): Signature for Notification listeners.
NullableIndexedWidgetBuilder = Widget? Function(BuildContext context, int index): Signature for a function that creates a widget for a given index, e.g., in a list, but may return null.
NumberInputKey = FormKey<num>
NumberTickerBuilder = Widget Function(BuildContext context, num number, Widget? child): A callback that builds a widget based on an animated number value.
NumberTickerFormatted = String Function(num number): A callback that formats a number into a string representation.
OnContextedCallback<T extends Intent> = Object? Function(T intent, [BuildContext? context])
OnContextInvokeCallback<T extends Intent> = Object? Function(T intent, [BuildContext? context])
OnInvokeCallback<T extends Intent> = Object? Function(T intent): The signature of a callback accepted by CallbackAction.onInvoke.
OnKeyEventCallback = KeyEventResult Function(KeyEvent event): Signature of a callback used by FocusManager.addEarlyKeyEventHandler and FocusManager.addLateKeyEventHandler.
OptionalDataWidgetBuilder<T> = Widget Function(BuildContext context, T? data, Widget? child): A widget builder that receives the data (that may be null) from the ancestor
OptionalWidgetBuilder = Widget? Function(BuildContext context)
OrientationWidgetBuilder = Widget Function(BuildContext context, Orientation orientation): Signature for a function that builds a widget given an Orientation.
OTPCodepointList = List<int?>
OverlayChildLayoutBuilder = Widget Function(BuildContext context, OverlayChildLayoutInfo info): The signature of the widget builder callback used in OverlayPortal.overlayChildLayoutBuilder.
PageRouteFactory = PageRoute<T> Function<T>(RouteSettings settings, WidgetBuilder builder): The signature of WidgetsApp.pageRouteBuilder.
Painter = void Function(PaintingContext context, Offset offset): / A signature for a function that paints with a PaintingContext.
PaintImageCallback = void Function(ImageSizeInfo info): Called when the framework is about to paint an Image to a Canvas with an ImageSizeInfo that contains the decoded size of the image as well as its output size.
PathBuilder = Path Function(Size)
PhoneInputKey = FormKey<PhoneNumber>
PlatformViewSurfaceFactory = Widget Function(BuildContext context, PlatformViewController controller): A factory for a surface presenting a platform view as part of the widget hierarchy.
PointerCancelEventListener = void Function(PointerCancelEvent event): Signature for listening to PointerCancelEvent events.
PointerDownEventListener = void Function(PointerDownEvent event): Signature for listening to PointerDownEvent events.
PointerMoveEventListener = void Function(PointerMoveEvent event): Signature for listening to PointerMoveEvent events.
PointerUpEventListener = void Function(PointerUpEvent event): Signature for listening to PointerUpEvent events.
PopInvokedCallback = void Function(bool didPop): A callback type for informing that a navigation pop has been invoked, whether or not it was handled successfully.
PopInvokedWithResultCallback<T> = void Function(bool didPop, T? result): A callback type for informing that a navigation pop has been invoked, whether or not it was handled successfully.
PopoverFutureVoidCallback<T> = Future<T> Function(T value)
PopPageCallback = bool Function(Route route, dynamic result): Signature for the Navigator.onPopPage callback.
PopResultCallback<T> = void Function(T? result): A signature for a function that is passed the result of a Route.
Predicate<T> = bool Function(T value)
PreviewLabelBuilder = Widget Function(BuildContext context, Color color)
ProfileReporterCallback = void Function(double ms)
PropertyLerp<T> = T? Function(T? a, T? b, double t)
PylonBuilder = Widget Function(BuildContext context): A typedef for a function that builds a widget given a BuildContext.
RadioBuilder = Widget Function(BuildContext context, ToggleableStateMixin<StatefulWidget> state): Signature for RawRadio.builder.
RadioCardKey = FormKey<int>
RadioGroupKey = FormKey<int>
RawMenuAnchorChildBuilder = Widget Function(BuildContext context, MenuController controller, Widget? child): Signature for the builder function used by RawMenuAnchor.builder to build the widget that the RawMenuAnchor surrounds.
RawMenuAnchorCloseRequestedCallback = void Function(VoidCallback hideOverlay): Signature for the callback used by RawMenuAnchor.onCloseRequested to intercept requests to close a menu.
RawMenuAnchorOpenRequestedCallback = void Function(Offset? position, VoidCallback showOverlay): Signature for the callback used by RawMenuAnchor.onOpenRequested to intercept requests to open a menu.
RawMenuAnchorOverlayBuilder = Widget Function(BuildContext context, RawMenuOverlayInfo info): Signature for the builder function used by RawMenuAnchor.overlayBuilder to build a menu's overlay.
RebuildDirtyWidgetCallback = void Function(Element e, bool builtOnce): Signature for debugOnRebuildDirtyWidget implementations.
Reducer<State, Action> = State Function(State state, Action action): Composes an Action and a State to create a new State.
RefreshIndicatorBuilder = Widget Function(BuildContext context, RefreshTriggerStage stage)
RegisterServiceExtensionCallback = void Function({required ServiceExtensionCallback callback, required String name}): Signature for a method that registers the service extension callback with the given name.
RegisterViewFactory = void Function(String, Object (int viewId), {bool isVisible}): Function signature for ui_web.platformViewRegistry.registerViewFactory.
RenderConstrainedLayoutBuilder<LayoutInfoType, ChildType extends RenderObject> = RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType>: Generic mixin for RenderObjects created by an AbstractLayoutBuilder with the the same LayoutInfoType.
ReorderCallback = void Function(int oldIndex, int newIndex): A callback used by ReorderableList to report that a list item has moved to a new position in the list.
ReorderDragBoundaryProvider = DragBoundaryDelegate<Rect>? Function(BuildContext context): Used to provide drag boundaries during drag-and-drop reordering.
ReorderItemProxyDecorator = Widget Function(Widget child, int index, Animation<double> animation): Signature for the builder callback used to decorate the dragging item in ReorderableList and SliverReorderableList.
ReparentChildBuilder = Widget Function(Widget parent, Widget child): The builder type used by Animate.reparentTypes. It must accept an existing parent widget, and rebuild it with the provided child. In effect, it clones the provided parent widget with the new child.
ReplacementInfo = (int, String)
RestorableRouteBuilder<T> = Route<T> Function(BuildContext context, Object? arguments): Creates a Route that is to be added to a Navigator.
RouteCompletionCallback<T> = void Function(T result): A callback to handle the result of a completed Route.
RouteFactory = Route? Function(RouteSettings settings): Creates a route for the given route settings.
RouteListFactory = List<Route> Function(NavigatorState navigator, String initialRoute): Creates a series of one or more routes.
RoutePageBuilder = Widget Function(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation): Signature for the function that builds a route's primary contents. Used in PageRouteBuilder and showGeneralDialog.
RoutePredicate = bool Function(Route route): Signature for the Navigator.popUntil predicate argument.
RoutePresentationCallback = String Function(NavigatorState navigator, Object? arguments): A callback that given some arguments and a navigator adds a new restorable route to that navigator and returns the opaque ID of that new route.
RouteTransitionsBuilder = Widget Function(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child): Signature for the function that builds a route's transitions. Used in PageRouteBuilder and showGeneralDialog.
ScrollableBuilder = Widget Function(BuildContext context, Offset offset, Size viewportSize, Widget? child)
ScrollableWidgetBuilder = Widget Function(BuildContext context, ScrollController scrollController): The signature of a method that provides a BuildContext and ScrollController for building a widget that may overflow the draggable Axis of the containing DraggableScrollableSheet.
ScrollControllerCallback = void Function(ScrollPosition position): Signature for when a ScrollController has added or removed a ScrollPosition.
ScrollIncrementCalculator = double Function(ScrollIncrementDetails details): A typedef for a function that can calculate the offset for a type of scroll increment given a ScrollIncrementDetails.
ScrollNotificationCallback = void Function(ScrollNotification notification): A ScrollNotification listener for ScrollNotificationObserver.
ScrollNotificationPredicate = bool Function(ScrollNotification notification): A predicate for ScrollNotification, used to customize widgets that listen to notifications from their children.
SearchPredicate<T> = double Function(T value, String query)
SelectableRegionContextMenuBuilder = Widget Function(BuildContext context, SelectableRegionState selectableRegionState): Signature for a widget builder that builds a context menu for the given SelectableRegionState.
SelectionChangedCallback = void Function(TextSelection selection, SelectionChangedCause? cause): Signature for the callback that reports when the user changes the selection (including the cursor location).
SelectItemsBuilder<T> = FutureOr<SelectItemDelegate> Function(BuildContext context, String? searchQuery)
SelectItemWidgetBuilder = Widget Function(BuildContext context, int index)
SelectKey<T> = FormKey<T>
SelectPopupBuilder = Widget Function(BuildContext context)
SelectValueBuilder<T> = Widget Function(BuildContext context, T value)
SelectValueChanged<T> = bool Function(T value, bool selected)
SelectValueSelectionHandler<T> = T? Function(T? oldValue, Object? value, bool selected)
SelectValueSelectionPredicate<T> = bool Function(T? value, Object? test)
SemanticIndexCallback = int? Function(Widget widget, int localIndex): A callback which produces a semantic index given a widget and the local index.
SemanticsBuilderCallback = List<CustomPainterSemantics> Function(Size size): Signature of the function returned by CustomPainter.semanticsBuilder.
SetChangeListener<T> = void Function(SetChangeDetails<T> details): A set that can be listened to for changes and notifies listeners when the set changes.
ShaderCallback = Shader Function(Rect bounds): Signature for a function that creates a Shader for a given Rect.
ShaderUpdateCallback = EdgeInsets? Function(ShaderUpdateDetails details): Function signature for ShaderEffect update handlers.
ShaderWarmUpImageCallback = bool Function(Image image): The signature of debugCaptureShaderWarmUpImage.
ShaderWarmUpPictureCallback = bool Function(Picture picture): The signature of debugCaptureShaderWarmUpPicture.
SharedAppDataInitCallback<T> = T Function(): The type of the SharedAppData.getValue init parameter.
SkeletonizerPainter = void Function(SkeletonizerPaintingContext context, Rect paintBounds, Painter paint, TextDirection? textDirection): A signature for a function that paints with a SkeletonizerPaintingContext.
SliderKey = FormKey<SliderValue>
SliverLayoutWidgetBuilder = Widget Function(BuildContext context, SliverConstraints constraints): The signature of the SliverLayoutBuilder builder function.
SortableItemBuilder<T> = T Function(BuildContext context, int index)
SortableWidgetBuilder<T> = Widget Function(BuildContext context, int index, T item)
StarRatingKey = FormKey<double>
StatefulWidgetBuilder = Widget Function(BuildContext context, StateSetter setState): Signature for the builder callback used by StatefulBuilder.
StateSetter = void Function(VoidCallback fn): The signature of State.setState functions.
StepSizeBuilder = Widget Function(BuildContext context, Widget child): Function type for building size-appropriate step content.
SubFocusBuilder = Widget Function(BuildContext context, SubFocusState state): Callback function type for building SubFocus widgets.
SubFocusScopeBuilder = Widget Function(BuildContext context, SubFocusScopeState state): Callback function type for building SubFocusScope widgets.
SuggestionBuilder = FutureOr<Iterable<String>> Function(String query)
SwitchKey = FormKey<bool>
SyncVoidCallback<T> = void Function()
SyncVoidCallbackR<T> = T Function()
TabBuilder = Widget Function(BuildContext context, List<Widget> children)
TabChildBuilder = Widget Function(BuildContext context, TabContainerData data, Widget child)
TableCellThemeBuilder = TableCellTheme Function(BuildContext context)
TableSizeSupplier = TableSize Function(int index)
TabPaneItemBuilder<T> = TabChild Function(BuildContext context, TabPaneData<T> item, int index): Builder function for creating tab child widgets from tab pane data.
TapBehaviorButtonBuilder = Widget Function(BuildContext context, {required VoidCallback onPressed, required bool selectionOnTapEnabled, required String semanticsLabel}): Signature for the builder callback used by WidgetInspector.tapBehaviorButtonBuilder.
TapRegionCallback = void Function(PointerDownEvent event): Signature for a callback called for a PointerDownEvent relative to a TapRegion.
TapRegionUpCallback = void Function(PointerUpEvent event): Signature for a callback called for a PointerUpEvent relative to a TapRegion.
TextAreaKey = FormKey<String>
TextFieldKey = FormKey<String>
ThrottleCallback = void Function()
TimeInputKey = FormKey<TimeOfDay>
TimePickerKey = FormKey<TimeOfDay>
ToastBuilder = Widget Function(BuildContext context, ToastOverlay overlay)
ToggleEffectBuilder = Widget Function(BuildContext context, bool value, Widget child)
ToggleKey = FormKey<bool>
ToolbarBuilder = Widget Function(BuildContext context, Widget child): The type for a Function that builds a toolbar's container with the given child.
TransformCallback = Matrix4 Function(double animationValue): Signature for the callback to MatrixTransition.onTransform.
TransitionBuilder = Widget Function(BuildContext context, Widget? child): A builder that builds a widget given a child.
TraversalRequestFocusCallback = void Function(FocusNode node, {double? alignment, ScrollPositionAlignmentPolicy? alignmentPolicy, Curve? curve, Duration? duration}): Signature for the callback that's called when a traversal policy requests focus.
TreeNodeSelectionChanged<T> = void Function(List<TreeNode<T>> selectedNodes, bool multiSelect, bool selected)
TreeNodeUnaryOperator<K> = TreeNode<K>? Function(TreeNode<K> node)
TreeNodeUnaryOperatorWithParent<K> = TreeNode<K>? Function(TreeNode<K>? parent, TreeNode<K> node)
TreeSliverNodeBuilder = Widget Function(BuildContext context, TreeSliverNode<Object?> node, AnimationStyle animationStyle): Signature for a function that creates a Widget to represent the given TreeSliverNode in the TreeSliver.
TreeSliverNodeCallback = void Function(TreeSliverNode<Object?> node): Signature for a function that is called when a TreeSliverNode is toggled, changing its expanded state.
TreeSliverRowExtentBuilder = double Function(TreeSliverNode<Object?> node, SliverLayoutDimensions dimensions): Signature for a function that returns an extent for the given TreeSliverNode in the TreeSliver.
TweenConstructor<T extends Object> = Tween<T> Function(T targetValue): Signature for a Tween factory.
TweenVisitor<T extends Object> = Tween<T>? Function(Tween<T>? tween, T targetValue, TweenConstructor<T> constructor): Signature for callbacks passed to ImplicitlyAnimatedWidgetState.forEachTween.
TwoDimensionalIndexedWidgetBuilder = Widget? Function(BuildContext context, ChildVicinity vicinity): Signature for a function that creates a widget for a given ChildVicinity, e.g., in a TwoDimensionalScrollView, but may return null.
TwoDimensionalViewportBuilder = Widget Function(BuildContext context, ViewportOffset verticalPosition, ViewportOffset horizontalPosition): Signature used by TwoDimensionalScrollable to build the viewport through which the scrollable content is displayed.
UnaryOperator<T> = T Function(T value)
ValidatedBuilder = Widget Function(BuildContext context, ValidationResult? error, Widget? child)
ValidatorBuilderFunction<T> = FutureOr<ValidationResult?> Function(T? value)
ValueChanged<T> = void Function(T value): Signature for callbacks that report that an underlying value has changed.
ValueChangeListener<T> = void Function(T value, T previous): A callback that receives a value and the previous value.
ValueGetter<T> = T Function(): Signature for callbacks that are to report a value on demand.
ValueListenableTransformer<T> = T Function(T): Signature for method used to transform values in Animation.fromValueListenable.
ValueSetter<T> = void Function(T value): Signature for callbacks that report that a value has been set.
ValueWidgetBuilder<T> = Widget Function(BuildContext context, T value, Widget? child): Builds a Widget when given a concrete value of a ValueListenable<T>.
ViewportBuilder = Widget Function(BuildContext context, ViewportOffset position): Signature used by Scrollable to build the viewport through which the scrollable content is displayed.
VoidCallback = void Function(): Signature of callbacks that have no arguments and return no data.
WidgetBuilder = Widget Function(BuildContext context): Signature for a function that creates a widget, e.g. StatelessWidget.build or State.build.
WidgetPropertyResolver<T> = T Function(Set<WidgetState> states): Signature for the function that returns a value of type T based on a given set of states.
WidgetStateMap<T> = Map<WidgetStatesConstraint, T>: A Map used to resolve to a single value of type T based on the current set of Widget states.
WidgetTextWrapper = Widget Function(BuildContext context, Widget child)
WillPopCallback = Future<bool> Function(): Signature for a callback that verifies that it's OK to call Navigator.pop.
WordInfo = (int, String)
WrappedIconDataBuilder<T> = T Function(BuildContext context, ThemeData theme)
WrappedTextDataBuilder<T> = T Function(BuildContext context, ThemeData theme)
WrapperBuilder = Widget Function(BuildContext context, Widget child)

Exceptions / Errors

FlutterError: Error class used to report Flutter-specific assertion failures and contract violations.
NetworkImageLoadException: The exception thrown when the HTTP request to load a network image fails.
TickerCanceled: Exception thrown by Ticker objects on the TickerFuture.orCancel future when the ticker is canceled.

util/promotions library

Classes

Enums

Mixins

Extension Types

Extensions

Constants

Properties

Functions

Typedefs

Exceptions / Errors

arcane package

promotions library