arcane
library
Classes
AbsoluteKeyframe <T >
AbsoluteResizablePaneController
AbsorbPointer
A widget that absorbs pointers during hit testing.
AbstractArcaneTheme
AbstractButtonStyle
AbstractChatMessage
AbstractChatUser
AbstractSelectItem <T >
AbstractStatefulScreen
AbstractStatelessScreen
Accordion
AccordionItem
AccordionTheme
Styling options for AccordionItem , AccordionTrigger and Accordion .
AccordionTrigger
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.
ActionOption
Actions
A widget that maps Intent s to Action s 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.
Adaptive
AdaptiveScaler
AdaptiveScaling
AdaptiveSize
Alert
AlertDialog
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.
AnimatedArcaneCheckPainter
AnimatedBuilder
A general-purpose widget for building animations.
AnimatedCheckPainter
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 >
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 double s 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
AppKitView
Widget that contains a macOS AppKit view.
AppLifecycleListener
A listener that can be used to listen to changes in the application
lifecycle.
Arcane
ArcaneAlertDialog
ArcaneApp
ArcaneAppState
ArcaneArtsLogo
ArcaneBlur
ArcaneCheckbox
ArcaneDialog
ArcaneDrawerSignal
ArcaneForm <T >
ArcaneFormBool <T >
ArcaneFormField
ArcaneFormFieldContainer
ArcaneFormFieldStateless
ArcaneFormInteger <T >
ArcaneFormIntegerState <T >
ArcaneFormState <T >
ArcaneFormString <T >
ArcaneFormStringState <T >
ArcanePageMeta
ArcaneRoutingNavigationObserver
ArcaneScrollBehavior
ArcaneTheme
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 AssetBundle s.
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
AutocompleteHighlightedOption
An inherited widget used to indicate which autocomplete option should be
highlighted for keyboard navigation.
AutocompleteNextOptionIntent
An Intent to highlight the next option in the autocomplete list.
AutocompletePreviousOptionIntent
An Intent to highlight the previous option in the autocomplete list.
AutofillGroup
An AutofillScope widget that groups AutofillClient s 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 ShapeBorder s.
Avatar
AvatarBadge
AvatarGroup
AvatarGroupClipper
AvatarWidget
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 .
BackdropTransformData
BallisticScrollActivity
An activity that animates a scroll view based on a physics Simulation .
Banner
Displays a diagonal message above the corner of another widget.
BannerPainter
Paints a Banner .
Bar
BarAction
BarActions
BarSection
Baseline
A widget that positions its child according to the child's baseline.
Basic
BasicCard
Card(child: Basic()) macro
BasicLayout
Same as basic, but without forcing the text style
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.
BlockBackButton
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.
BlurSurface
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.
BoolOption
BoolOptionView
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 BorderRadius s.
BorderSide
A side of a border of a box.
BorderTween
An interpolation between two Border s.
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
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
ButtonActivateIntent
An Intent that activates the currently focused button.
ButtonBar
ButtonDensity
ButtonGroup
ButtonSize
ButtonState <T extends Button >
ButtonStyle
ButtonStyleOverride
ButtonStyleOverrideData
ButtonStylePropertyAll <T >
ButtonVariance
Calendar
CalendarItem
CalendarValue
CalendarView
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.
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 InheritedTheme s that can be wrapped around a
child Widget .
CapturedWrapper
Card
CardButton
CardCarousel
CardImage
Carousel
A carousel widget.
The carousel widget is used to display a list of items in a carousel view.
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.
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.
CBasic <T extends Conjured >
CCard <T extends Conjured >
Center
A widget that centers its child within itself.
CenterBody
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.
ChartColorScheme
ChatBox
ChatDivider
ChatMessageBubble
ChatMessageGroup
ChatMessageTile
ChatMessageView
ChatProvider
ChatScreen
ChatScreenState
CheckboardPainter
Checkbox
CheckboxTile
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
ChipButton
ChipInput <T >
ChipInputState <T >
CircleBorder
A border that fits a circle within the available space.
CircularNotchedRectangle
A rectangle with a smooth circular notch.
CircularProgressIndicator
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.
CListTile <T extends Conjured >
CodeSnippet
CollapseTreeNodeIntent
Collapsible
https://sunarya-thito.github.io/shadcn_flutter/#/components/collapsible
CollapsibleContent
CollapsibleState
CollapsibleStateData
CollapsibleTheme
Styling options for Collapsible , CollapsibleTrigger .
CollapsibleTrigger
Color
An immutable 32 bit 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
ColorInputSet
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.
ComfyColumnWidth
Command
CommandCategory
CommandEmpty
CommandItem
CompareTo <T extends Comparable <T > >
CompareWith <T extends Comparable <T > >
ComponentElement
An Element that composes other Element s.
ComponentTheme <T >
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 >
An abstract superclass for widgets that defer their building until layout.
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.
The type and callback for a context menu button.
Builds and manages a context menu at a given location.
ContinuousRectangleBorder
A rectangular border with smooth continuous transitions between the straight
sides and the rounded corners.
ContrastedColorScheme
ControlledAnimation
ControlPoint
A control point used in defining the gradient mask for the blur effect.
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
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.
CSubtitle <T extends ConjuredSubtitle >
CTitle <T extends ConjuredTitle >
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.
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 .
DataColumn
Extension of stock DataColumn , adds the capability to set relative column
size via size property
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.
DataRow
Extension of standard DataRow , adds row level tap events. Also there're
onSecondaryTap and onSecondaryTapDown which are not available in DataCells and
which can be useful in Desktop settings when a reaction to the right click is required.
DataTable
In-place replacement of standard DataTable widget, mimics it API.
Has the header row always fixed and core of the table (with data rows)
scrollable and stretching to max width/height of it's container.
By using DataColumn instead of DataColumn it is possible to control
relative column sizes (setting them to S, M and L). DataRow provides
row-level tap event handlers.
DatePicker
DatePickerDialog
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 Decoration s.
DecreaseSliderValue
DefaultAssetBundle
A widget that determines the default asset bundle for its descendants.
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.
DesktopPointerScrollEvent
DesktopTextSelectionToolbarLayoutDelegate
Positions the toolbar at anchor if it fits, otherwise moves it so that it
just fits fully on-screen.
DestructiveBadge
DestructiveButton
DevToolsDeepLinkProperty
Debugging message for DevTools deep links.
DiagnosticsNode
Defines diagnostics data for a value .
DialogConfirm
DialogConfirmText
DialogDate
DialogDateMulti
DialogDateRange
DialogEmail
DialogOverlayCompleter <T >
DialogOverlayHandler
DialogRoute <T >
DialogText
DialogTime
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.
DirectionalSelectTreeNodeIntent
DirectionalTextEditingIntent
A text editing related Intent that performs an operation towards a given
direction of the current caret location.
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.
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
DividerPainter
DividerProperties
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
DotItem
DoubleOption
DoubleOptionView
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 >
DrawerWrapper
DrivenScrollActivity
An activity that animates a scroll view based on animation parameters.
DualTransitionBuilder
A transition builder that animates its child based on the
AnimationStatus of the provided animation .
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 EdgeInsetsGeometry s.
EdgeInsetsTween
An interpolation between two EdgeInsets s.
EditableText
A basic text input field.
EditableTextState
State for an EditableText .
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
EmptyTextSelectionControls
Text selection controls that do not show any toolbars or handles.
EnumOption <T extends Enum >
EnumOptionView <T extends Enum >
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.
ExpandedContent
Widget which is shown when the SliverSnap is expanded.
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
ExpansionBarSection
ExpansionBarState
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.
Fab
FabGroup
FabSocket
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.
FillScreen
FittedBox
Scales and positions its child within itself according to fit .
FittedSizes
The pair of sizes returned by applyBoxFit .
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 Tween s.
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.
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 6.6.0
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
FormController
FormEntry <T >
FormEntryErrorBuilder
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 >
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
FutureBuilder <T >
A widget that builds itself based on the latest snapshot of interaction with
a Future .
FutureOnce <T >
FutureOnceState <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
Glass
GlassAntiFlicker
GlassSection
GlassStopper
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.
GridPaper
A widget that draws a rectilinear grid of lines one pixel wide.
Grids
GridView
A scrollable, 2D array of widgets.
Gutter
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 Hero es in the widget subtree.
HoldScrollActivity
A scroll activity that does nothing but can be released to resume
normal idle behavior.
HorizontalResizableDragger
A Horizontal dragger that can be used as a divider between resizable panes.
HoverCard
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 IconData s in Icons .
IconButton
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.
Icons
IconTab
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.
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
ImagePlaceholderView
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
ImageStream s.
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.
ImageStyle
ImageTools
ImageView
ImageWithStyle
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
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
MultiChildRenderObjectElement s.
IndexedStack
A Stack that shows a single child from a list of children.
InfoOption
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.
InjectBarEnds
InjectBarLeading
InjectBarTrailing
InlineSpan
An immutable span of inline content which forms part of a paragraph.
InlineSpanSemanticsInformation
The textual and semantic label information for an InlineSpan .
InputOTP
InputOTPChild
InputOTPChildData
InsideSheetSignal
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 DiagnosticsNode s 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
IntOption
IntOptionView
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
IOVFS
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 Widget s, Element s and SemanticsNode s.
KeyboardDisplay
KeyboardInsertedContent
A class representing rich content (such as a PNG image) inserted via the
system input method.
KeyboardKeyDisplay
KeyboardListener
A widget that calls a callback whenever the user presses or releases a key
on a keyboard.
KeyboardSheet
KeyboardShortcutDisplayHandle
KeyboardShortcutDisplayMapper
KeyedSubtree
A widget that builds its child.
KeyEvent
Defines the interface for keyboard key events.
Keyframe <T >
KeySet <T extends KeyboardKey >
A set of KeyboardKey s that can be used as the keys in a Map .
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 RenderObjectWidget s that configure RenderObject subclasses
that have no children.
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 LinearBorderEdge s, 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
LineMetrics
LineMetrics stores the measurements and statistics of a single line in the
paragraph.
LinkButton
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 >
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.
LocalKey
A key that is not a GlobalKey .
LogicalKeySet
A set of LogicalKeyboardKey s 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.
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 .
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 Matrix4 s.
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 >
MaybeStack
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
MemoryImage
Decodes the given Uint8List buffer as an image, associating it with the
given scale.
MenuOverlayHandler
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 >
ModalBarrier
A widget that prevents the user from interacting with widgets behind itself.
ModalContainer
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
MotionBlurScrollable
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 RenderObjectWidget s 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.
Multiplexer <O >
MultiSelect <T >
MultiSelectableSelectionContainerDelegate
A delegate that handles events and updates for multiple Selectable
children.
MultiSelectState <T >
MultiSliver
MultiSliver allows for returning multiple slivers from a single build method
MultiSliverParentData
MutableNotifier <T >
A notifier class that allows mutable updates and notifies listeners of changes.
MutablePylon <T >
MutablePylonState <T >
MutableText
NavDivider
NavigationBar
NavigationBarItem
NavigationButton
NavigationChildControlData
NavigationContent
NavigationContentList
NavigationControlData
NavigationDivider
NavigationGap
NavigationItem
NavigationItemState
NavigationLabel
NavigationNotification
A notification that a change in navigation has taken place.
NavigationRail
NavigationScreen
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.
NavItem
NavTab
NavWidget
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
NextSiblingFocusIntent
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 Notification s bubbling up the tree.
NotValidator <T >
NumberInput
NumberTicker
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 >
ObjectFormFieldState <T >
ObjectFormHandler <T >
ObjectKey
A key that takes its identity from the object used as its 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 ImageStream s (those
with only one frame).
OnGesture
OnHover
Opacity
A widget that makes its child partially transparent.
Option
OptionField <T >
OptionGroup
OptionGroupView
OptionScreen
OptionScreenTile
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
OutlinedBorder
A ShapeBorder that draws an outline with the width and color specified
by side .
OutlinedContainer
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
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 .
A modal route that replaces the entire screen.
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.
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
RenderObjectWidget s.
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
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.
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.
A class for representing menu items that have child submenus.
A menu bar that uses the platform's native APIs to construct and render a
menu described by a PlatformMenu /PlatformMenuItem hierarchy.
An abstract delegate class that can be used to set
WidgetsBinding.platformMenuDelegate to provide for managing platform
menus.
A class for PlatformMenuItem s that do not have submenus (as a PlatformMenu
would), but can be selected.
A class that groups other menu items into sections delineated by dividers.
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.
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
PopoverAnchor
PopoverAnchorState
PopoverController
PopoverLayout
PopoverLayoutRender
PopoverOverlayHandler
PopScope <T >
Manages back navigation gestures.
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
PreviousSiblingFocusIntent
PreviousSuggestionIntent
PrimaryBadge
PrimaryButton
PrimaryScrollController
Associates a ScrollController with a subtree.
PrioritizedAction
An Action that iterates through a list of Intent s, invoking the first
that is enabled.
PrioritizedIntents
An Intent that evaluates a series of specified orderedIntents for
execution.
Progress
A progress indicator that shows the progress of a task.
ProgressTheme
A theme for Progress .
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 to its descendants. This is useful for passing values
to widgets that are not directly related to each other
PylonCluster
A widget that combines multiple Pylon widgets into a single widget. This is essentially the same as
nesting multiple pylon widgets, but with the advantage of not spamming builder widgets in the widget tree
All pylons are built with just an immediate child of the next, with the last pylon provided containing your builder method
this ensures all pylons are immediately available to the builder method without spamming builder widgets
PylonCodec <T >
PylonFuture <T >
Combines a FutureBuilder with a Pylon widget. When the future completes,
the value is passed to the Pylon widget with the builder function provided
PylonPort <T extends PylonCodec >
PylonRemove <T >
Nullifies a pylon value from the widget tree
PylonStream <T >
Combines a StreamBuilder with a Pylon widget. When the stream emits a value,
the value is passed to the Pylon widget with the builder function provided
RadialGradient
A 2D radial gradient.
Radio
RadioCard <T >
RadioCards <T >
RadioGroup <T >
RadioGroupData <T >
RadioItem <T >
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.
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".
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
RefreshTriggerPhysics
RefreshTriggerStage
RefreshTriggerState
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
RenderMultiSliver
The RenderObject that handles laying out and painting the children of MultiSliver
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
RenderObjectWidget s provide the configuration for RenderObjectElement s,
which wrap RenderObject s, 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 >
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
ResizablePane
ResizablePanel
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
RestorationBucket s.
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.
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 RouteAware s 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.
SafeArea
A widget that insets its child by sufficient padding to avoid intrusions by
the operating system.
SafeBar
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
ScaffoldBarData
ScaffoldState
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
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
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.
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
SearchBox
SearchButton
SearchQuery <T >
SearchResult
SecondaryBadge
SecondaryButton
Select <T >
SelectableRegion
A widget that introduces an area for user selections.
SelectableRegionState
State for a SelectableRegion .
SelectableText
SelectAction
An action that selects the currently focused control.
SelectAllTextIntent
An Intent to select everything in the field.
SelectData
SelectedButton
SelectedButtonState
SelectGroup <T >
SelectIntent
An Intent that selects the currently focused control.
SelectionContainer
A container that handles SelectionEvent s for the Selectable s in
the subtree.
SelectionContainerDelegate
A delegate to handle SelectionEvent s for a SelectionContainer .
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 <T >
SelectItemButton <T >
SelectLabel
Selector <T >
SelectSearchResult
SelectState <T >
SelectSuggestionIntent
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 .
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.
SettingsScreen
SGridView
ShadcnAnimatedTheme
ShadcnApp
ShadcnLayer
ShadcnLocalizations
ShadcnLocalizationsDelegate
ShadcnPointArcTween
ShadcnRectArcTween
ShadcnScrollBehavior
ShadcnSkeletonizerConfigLayer
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.
Sheet
SheetOverlayHandler
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
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 RenderObjectWidget s 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
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
SliderValue
SlideTransition
Animates the position of a widget relative to its normal position.
SlidingCarouselTransition
A sliding carousel transition.
SListView
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 .
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.
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.
SliverGutter
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.
A sliver whose size varies when the sliver is scrolled to the edge
of the viewport opposite the sliver's GrowthDirection .
Delegate for configuring a SliverPersistentHeader .
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.
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.
SliverScreen
SliverSkeletonizer
A Skeletonizer widget that can be used in a CustomScrollView
SliverSnap
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 RenderObjectWidget s that configure RenderObject
subclasses that organize their children in different slots.
SlottedRenderObjectElement <SlotType , ChildType extends RenderObject >
Element used by the SlottedMultiChildRenderObjectWidget .
SnappingAppBarBody
SnappingScrollNotificationHandler
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
Sortable <T >
SortableChildBuilderDelegate <T >
SortableChildListDelegate <T >
SortableData <T >
SortableDropFallback <T >
SortableLayer
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.
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
StagedBreakpoint
StarBorder
A border that fits a star or polygon-shaped border within the rectangle of
the widget it is applied to.
StarRating
State <T extends StatefulWidget >
The logic and internal state for a StatefulWidget .
StatedWidget
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.
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.
StaticTable
StatusTransitionWidget
A widget that rebuilds when the given animation changes status.
Step
StepContainer
StepItem
StepNumber
StepNumberData
Stepper
StepperController
StepperValue
StepProperties
Steps
StepTitle
StepTween
An interpolation between two integers that floors.
StepVariant
StillKeyframe <T >
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.
StringOption
StringOptionView
StrutStyle
Defines the strut, which sets the minimum height a line can be
relative to the baseline.
SubmissionResult
SubmitButton
SurfaceBarrierPainter
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.
Switch
SwitchAnimationConfig
Holds the configuration for the switch animation
SwitchTile
SyncedScrollControllers
Creates pairs of scroll controllers which can be provided to scrollables and ensure that
offset change in one scrollable scroll the second one (and vice a versa)
There's a bug (or feature) on iOS with bouncing scroll (when it goes out of range)
when scrollable get out of sync while in this bouncing position
Displays the system context menu on top of the Flutter view.
SystemMouseCursors
A collection of system MouseCursor s.
TabButton
TabItem
Table
TableBorder
Border specification for Table widgets.
TableCell
TableCellTheme
TableColumnWidth
Base class to describe how wide a column in a RenderTable should be.
TableLayoutResult
TableParentData
TableRef
TableRow
TableSize
TableTheme
TabList
TabPane
TabPaneData
TabPaneState
Tabs
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.
TD
Text
A run of text with a single style.
TextAlignVertical
The vertical alignment of text within an input box.
TextArea
TextBoneBorderRadius
Holds border radius information
for TextElement
TextBox
A rectangle enclosing a run of text.
TextButton
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
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 .
TextHeightBehavior
Defines how to apply TextStyle.height over and under text.
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).
TextPainter
An object that paints a TextSpan tree into a Canvas .
TextPosition
A position in a string of text.
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 TextStyle s.
TextToast
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.
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.
Tile
Timeline
TimelineAnimation <T >
TimelineData
TimeOfDay
TimePicker
TimePickerDialog
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.
Toast
ToastEntry
ToastEntryLayout
ToastLayer
ToastOverlay
Toggle
ToggleablePainter
A base class for a CustomPainter that may be passed to
ToggleableStateMixin.buildToggleable to draw the visual representation of
a Toggleable.
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
TooltipContainer
TR
Tracker
A widget that displays a tracker.
TrackerData
A class that holds data for a tracker.
TrackerLevel
An abstract class that holds values for different Tracker levels.
TrackerTheme
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 >
TreeItemExpandDefaultHandler <T >
TreeItemView
TreeNode <T >
TreeNodeData <T >
TreeNodeDepth
TreeRoot <T >
TreeSelectionDefaultHandler <T >
TreeSliver <T >
A widget that displays TreeSliverNode s that expand and collapse in a
vertically and horizontally scrolling Viewport .
TreeSliverController
Enables control over the TreeSliverNode s of a TreeSliver .
TreeSliverNode <T >
A data structure for configuring children of a TreeSliver .
TreeView <T >
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
Tween s.
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 >
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.
VEntity
VerticalDivider
VerticalDividerPainter
VerticalResizableDragger
A Vertical dragger that can be used as a divider between resizable panes.
VFile
VFolder
VFS
VFSComparator
VFSComparatorEntityType
VFSComparatorName
VFSDeleteIntent
VFSDeselectIntent
VFSDirectionalExpandIntent
VFSDirectionalIntent
VFSEntityContainer
VFSEntityGridTile
VFSEntityListTile
VFSLayout
VFSLayoutGrid
VFSLayoutList
VFSNewFolderIntent
VFSNewGoUpIntent
VFSOpenIntent
VFSRenameIntent
VFSSelectAllIntent
VFSTileDraggablePreview
VFSTreeView
VFSView
VFSViewState
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 View s.
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.
VPaths
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.
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 WidgetState s
which represent the interactive state of a component.
WidgetStateColor
Defines a Color that is also a WidgetStateProperty .
WidgetStateMouseCursor
Defines a MouseCursor whose value depends on a set of WidgetState s which
represent the interactive state of a component.
WidgetStateOutlinedBorder
Defines an OutlinedBorder whose value depends on a set of WidgetState s
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 WidgetState s.
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 WidgetState s and notifies listeners of changes.
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 .
WordBoundary
A TextBoundary subclass for locating word breaks.
Wrap
A widget that displays its children in multiple horizontal or vertical runs.
WrappedIcon
WrappedText
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.
AntiFlickerDirection
AppLifecycleState
States that an application can be in once it is running.
ArcaneBlurMode
ArcaneCheckboxState
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 .
BarBackButtonMode
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 .
BoxFit
How a box should be inscribed into another box.
BoxShape
The shape to use when rendering a Border or BoxDecoration .
ButtonShape
CalendarItemType
CalendarSelectionMode
CalendarValueLookup
CalendarViewType
CarouselAlignment
CarouselAlignment is used to align the carousel items.
ChatStyle
CheckboxState
Clip
Different ways to clip a widget's content.
ClipboardStatus
An enumeration of the status of the content on the user's clipboard.
ColorPickerMode
ColumnSize
Relative size of a column determines the share of total table width allocated
to each individual column. When determining column widths ratios between S, M and L
columns are kept (i.e. Large columns are set to 1.2x width of Medium ones)
CompareType
ConjuredField
ConnectionState
The state of connection to an asynchronous computation.
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 .
DateState
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 DragGestureRecognizer s of a
TwoDimensionalScrollable .
Direction
DismissDirection
The direction in which a Dismissible can be dismissed.
EdgeType
Represents the edge of a widget where the blur effect will be applied.
EditButtonType
ExpandMode
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.
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
GestureType
GrowthDirection
The direction in which a sliver's contents are ordered, relative to the
scroll offset axis.
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
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
NavigationContainerType
NavigationLabelType
NavigationMode
Describes the navigation mode to be set by a MediaQuery widget.
NavigationOverflow
NavigationRailAlignment
NavigationType
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.
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.
The list of possible platform provided, prebuilt menus for use in a
PlatformMenuBar .
PopoverConstraint
PromptMode
PylonRouteType
Represents common route types for Pylon.push
RenderComparison
The description of the difference between two objects, in the context of how
it will affect the rendering.
RepeatMode
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.
SearchButtonMode
Represents the search mode. Live is for changing a list live
and transactional is for submitting a search to perhaps open a screen or launch something.
SelectionChangedCause
Indicates what triggered the change in selected text (including changes to
the cursor location).
SelectionPosition
ShaderLayer
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
StepState
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.
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 .
TileWidgetPosition
ToastLocation
TraversalDirection
A direction along either the horizontal or vertical axes.
TraversalEdgeBehavior
Controls the transfer of focus beyond the first and the last items of a
FocusScopeNode .
TriggerStage
TRStyle
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.
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.
ArcaneDialogLauncher
ArcaneFormMixin <T >
ArcaneKBSheetLauncher
ArcaneRoute
ArcaneSheetLauncher
ArcaneToastLauncher
AutomaticKeepAliveClientMixin <T extends StatefulWidget >
A mixin with convenience methods for clients of AutomaticKeepAlive . Used
with State subclasses.
ChangesNotifierHelperMixin
A mixin that provides a way to notify listeners.
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.
FormValueSupplier <X extends StatefulWidget >
LocalHistoryRoute <T >
A mixin used by routes to handle back navigations internally by popping a list.
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.
RenderConstrainedLayoutBuilder <ConstraintType extends Constraints , ChildType extends RenderObject >
Generic mixin for RenderObject s created by ConstrainedLayoutBuilder .
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.
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 .
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 StatefulWidget s that implement toggleable
controls with toggle animations (e.g. Switch es, CupertinoSwitch es,
Checkbox es, CupertinoCheckbox es, Radio s, and CupertinoRadio s).
TreeSliverStateMixin <T >
A mixin for classes implementing a tree structure as expected by a
TreeSliverController .
ViewportElementMixin
A mixin that allows Element s containing Viewport like widgets to correctly
modify the notification depth of a ViewportNotificationMixin .
ViewportNotificationMixin
Mixin for Notification s 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.
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.
kDefaultRouteTraversalEdgeBehavior → const TraversalEdgeBehavior
The default value of Navigator.routeTraversalEdgeBehavior .
kDoubleTapMinTime → const Duration
kLargeStepIndicatorSize → const double
kMaxScrollSpeed → const double
kMediumStepIndicatorSize → const double
kScrollDragSpeed → const double
kSmallStepIndicatorSize → const double
kSwitchDuration → const Duration
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.
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.
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.
buildOnSignal (String signal , WidgetBuilder builder → Widget
buildTextSpanWithSpellCheckSuggestions (TextEditingValue value , 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.
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 FocusOnKeyCallback s or
FocusOnKeyEventCallback s.
combineSemanticsInfo (List <InlineSpanSemanticsInformation infoList → List <InlineSpanSemanticsInformation
Combines _semanticsInfo entries where permissible.
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.
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.
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
getPosition (Offset position , Size size , {bool acceptTop = false , bool acceptLeft = false , bool acceptRight = false , bool acceptBottom = false → _SortableDropLocation?
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.
isMobile (TargetPlatform platform → bool
join (Iterable <Widget widgets , Widget separator → Iterable <Widget
lerpColor (Color a , Color b , double t → Color
Linearly interpolate between two colors.
Also handles the case when one of the colors is transparent,
where Color.lerp fails to handle.
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 = true , BorderRadiusGeometry ?borderRadius , Size ?dragHandleSize , bool transformBackdrop = true , double ?surfaceOpacity , double ?surfaceBlur , Color ?barrierColor → Future <T? >
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 → DrawerOverlayCompleter <T? >
openSheet <T > ({required BuildContext context , required WidgetBuilder builder , required OverlayPosition position , bool barrierDismissible = true , bool transformBackdrop = false , Color ?barrierColor → Future <T? >
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
randomBool ()
→ dynamic
randomDouble ()
→ dynamic
registerPylonCodec <T extends PylonCodec > (T codec → void
runApp (Widget app , {bool usePathStrategy = true , bool setupMetaSEO = true → void
runWidget (Widget app → void
Inflate the given widget and bootstrap the widget tree.
shortcutActivatorToKeySet (ShortcutActivator activator → List <LogicalKeyboardKey
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
textDirectionToAxisDirection (TextDirection textDirection → AxisDirection
Returns the AxisDirection in which reading occurs in the given TextDirection .
timelineMaxDuration (Iterable <TimelineAnimation timelines → Duration
tweenValue <T > (T begin , T end , double t → T
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.
AdaptiveBuilder
= Widget Function(BuildContext context
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
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
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.
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 .
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
BoxConstraintsTransform
= BoxConstraints Function(BoxConstraints constraints
Signature for a function that transforms a BoxConstraints to another
BoxConstraints .
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
CheckboxListTile CheckboxTile
ChildIndexGetter
= int ? Function(Key key
Called to find the new index of a child based on its key in case of
reordering.
ChipWidgetBuilder T >
= Widget Function(BuildContext context , T chip
CodepointPredicate
= bool Function(int codepoint
CodepointUnaryOperator
= int Function(int codepoint
CollapsingStateCallback
= void Function(bool isCollapsed , double scrollingOffset , double maxExtent
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
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.
DateStateBuilder
= DateState Function(DateTime date
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
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.
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 size , EdgeInsets padding , int stackIndex
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
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.
FormFieldBuilder T >
= Widget Function(FormFieldState <T > field
Signature for building the widget representing the form field.
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.
FormSubmitCallback
= void Function(BuildContext context , Map <FormKey dynamic > values
FuturePredicate T >
= FutureOr <bool Function(T? value
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 Hero es 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.
InspectorSelectButtonBuilder
= Widget Function(BuildContext context , VoidCallback onPressed
Signature for the builder callback used by
WidgetInspector.selectButtonBuilder .
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
KeyboardShortcutDisplayBuilder
= Widget Function(BuildContext context , LogicalKeyboardKey key
LayoutWidgetBuilder
= Widget Function(BuildContext context , BoxConstraints constraints
The signature of the LayoutBuilder builder function.
ListChangeListener T >
= void Function(ListChangeDetails <T > details
A callback that receives a ListChangeDetails object.
ListTile Tile
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.
MaterialIcons Icons
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.
NavigationWidgetBuilder
= Widget Function(BuildContext context , bool selected
NavigatorFinderCallback
= NavigatorState Function(BuildContext context
A callback that given a BuildContext finds a NavigatorState .
Signature used by NestedScrollView for building its header.
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.
NumberTickerBuilder
= Widget Function(BuildContext context , num number , Widget ?child
NumberTickerFormatted
= String Function(num number
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 ?
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.
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
RebuildDirtyWidgetCallback
= void Function(Element e , bool builtOnce
Signature for debugOnRebuildDirtyWidget implementations.
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.
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.
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.
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.
SearchFilter T >
= int Function(T item , String query
SearchIndexer
= int Function(String query
SearchPredicate T >
= double Function(T value , String query
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).
SelectItemBuilder T >
= Widget Function(BuildContext context , SelectItemReporter selectItem , List <T > selectedValue
SelectItemReporter
= void Function(bool selected
SelectSearch
= void Function(String query
SelectValueChanged T >
= void Function(T value , bool selected
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.
SliverFill SliverFillRemainingBoxAdapter
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
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
SwitchListTile SwitchTile
SyncVoidCallback T >
= void Function()
SyncVoidCallbackR T >
= T Function()
TableCellThemeBuilder
= TableCellTheme Function(BuildContext context
TableSizeSupplier
= TableSize Function(int index
TapRegionCallback
= void Function(PointerDownEvent event
The type of callback that TapRegion.onTapOutside and
TapRegion.onTapInside take.
ToastBuilder
= Widget Function(BuildContext context , ToastOverlay overlay
ToggleEffectBuilder
= Widget Function(BuildContext context , bool value , Widget child
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.
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.
WillPopCallback
= Future <bool Function()
Signature for a callback that verifies that it's OK to call Navigator.pop .
WrappedIconDataBuilder T >
= T Function(BuildContext context , ThemeData theme
WrappedTextDataBuilder T >
= T Function(BuildContext context , ThemeData theme
