zendesk2
library
Classes
AccessibilityFeatures
Additional accessibility features that may be enabled by the platform.
Agent
AndroidMotionEvent
A Dart version of Android's MotionEvent .
AndroidPointerCoords
Position information for an Android pointer.
AndroidPointerProperties
Properties of an Android pointer.
AndroidViewController
Controls an Android view that is composed using a GL texture.
AppKitViewController
Controller for a macOS platform view.
ApplicationSwitcherDescription
Specifies a description of the application that is pertinent to the
embedder's application switcher (also known as "recent tasks") user
interface.
AssetBundle
A collection of resources used by the application.
AssetManifest
Contains details about available assets and their variants.
See Resolution-aware image assets
to learn about asset variants and how to declare them.
AssetMetadata
Contains information about an asset.
AutofillClient
An object that represents an autofillable input field in the autofill workflow.
AutofillConfiguration
A collection of autofill related information that represents an AutofillClient .
AutofillHints
A collection of commonly used autofill hint strings on different platforms.
AutofillScope
An ordered group within which AutofillClient s are logically connected.
BackdropFilterEngineLayer
An opaque handle to a backdrop filter engine layer.
BackgroundIsolateBinaryMessenger
A BinaryMessenger for use on background (non-root) isolates.
BasicMessageChannel <T >
A named channel for communicating with platform plugins using asynchronous
message passing.
BinaryCodec
MessageCodec with unencoded binary messages represented using ByteData .
BinaryMessenger
A messenger which sends binary data across the Flutter platform barrier.
Controls the browser's context menu on the web platform.
ByteData
A fixed-length, random-access sequence of bytes that also provides random
and unaligned access to the fixed-width integers and floating point
numbers represented by those bytes.
CachingAssetBundle
An AssetBundle that permanently caches string and structured resources
that have been fetched.
CallbackHandle
A wrapper for a raw callback handle.
Canvas
An interface for recording graphical operations.
ChannelBuffers
The buffering and dispatch mechanism for messages sent by plugins
on the engine side to their corresponding plugin code on the
framework side.
CharacterBoundary
A TextBoundary subclass for retrieving the range of the grapheme the given
position is in.
ChatAttachment
ChatAttachmentAttachment
ChatLog
ChatLogDeliveryStatus
ChatLogParticipant
ChatLogType
ChatMessage
ChatOptionsMessage
ChatRating
Clipboard
Utility methods for interacting with the system's clipboard.
ClipboardData
Data stored on the system clipboard.
ClipPathEngineLayer
An opaque handle to a clip path engine layer.
ClipRectEngineLayer
An opaque handle to a clip rect engine layer.
ClipRRectEngineLayer
An opaque handle to a clip rounded rect engine layer.
Codec
A handle to an image codec.
Color
An immutable 32 bit color value in ARGB format.
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.
ColorFilterEngineLayer
An opaque handle to a color filter engine layer.
Completer <T >
A way to produce Future objects and to complete them later
with a value or error.
DartPluginRegistrant
Helper functions for Dart Plugin Registrants.
DarwinPlatformViewController
Base class for iOS and macOS view controllers.
DefaultProcessTextService
The service used by default for the text processing feature.
DefaultSpellCheckService
The service used by default to fetch spell check results for text input.
DeferredComponent
Manages the installation and loading of deferred components.
DiagnosticPropertiesBuilder
Builder to accumulate properties and configuration used to assemble a
DiagnosticsNode from a Diagnosticable object.
Display
A configurable display that a FlutterView renders on.
DisplayFeature
Area of the display that may be obstructed by a hardware feature.
DocumentBoundary
A text boundary that uses the entire document as logical boundary.
EngineLayer
A handle for the framework to hold and retain an engine layer across frames.
EventChannel
A named channel for communicating with platform plugins using event streams.
EventSink <T >
A Sink that supports adding errors.
ExpensiveAndroidViewController
Controls an Android view that is composed using the Android view hierarchy.
This controller is created from the PlatformViewsService.initExpensiveAndroidView factory.
FilteringTextInputFormatter
A TextInputFormatter that prevents the insertion of characters matching
(or not matching) a particular pattern, by replacing the characters with the
given replacementString .
FlutterView
A view into which a Flutter Scene is drawn.
FontFeature
A feature tag and value that affect the selection of glyphs in a font.
FontLoader
A class that enables the dynamic loading of fonts at runtime.
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.
FragmentProgram
An instance of FragmentProgram creates Shader objects (as used by
Paint.shader ).
FragmentShader
A Shader generated from a FragmentProgram .
FrameData
Additional data available on each flutter frame.
FrameInfo
Information for a single frame of an animation.
FrameTiming
Time-related performance metrics of a frame.
Future <T >
The result of an asynchronous computation.
FutureOr <T >
A type representing values that are either Future<T> or T.
GestureSettings
Platform specific configuration for gesture behavior, such as touch slop.
GLFWKeyHelper
Helper class that uses GLFW-specific key mappings.
GlyphInfo
The measurements of a character (or a sequence of visually connected
characters) within a paragraph.
Gradient
A shader (as used by Paint.shader ) that renders a color gradient.
GtkKeyHelper
Helper class that uses GTK-specific key mappings.
HapticFeedback
Allows access to the haptic feedback interface on the device.
HardwareKeyboard
Manages key events from hardware keyboards.
Image
Opaque handle to raw decoded image data (pixels).
ImageDescriptor
A descriptor of data that can be turned into an Image via a Codec .
ImageFilter
A filter operation to apply to a raster image.
ImageFilterEngineLayer
An opaque handle to an image filter engine layer.
ImageShader
A shader (as used by Paint.shader ) that tiles an image.
ImmutableBuffer
A handle to a read-only byte buffer that is managed by the engine.
IsolateNameServer
Static methods to allow for simple sharing of SendPort s across Isolate s.
JSONMessageCodec
MessageCodec with UTF-8 encoded JSON messages.
JSONMethodCodec
MethodCodec with UTF-8 encoded JSON method calls and result envelopes.
KeyboardInsertedContent
A class representing rich content (such as a PNG image) inserted via the
system input method.
KeyboardKey
A base class for all keyboard key types.
KeyData
Information about a key event.
KeyDownEvent
An event indicating that the user has pressed a key down on the keyboard.
KeyEvent
Defines the interface for keyboard key events.
KeyEventManager
A singleton class that processes key messages from the platform and
dispatches converted messages accordingly.
KeyHelper
Abstract class for window-specific key mappings.
KeyMessage
The assembled information converted from a native key message.
KeyRepeatEvent
An event indicating that the user has been holding a key on the keyboard
and causing repeated events.
KeyUpEvent
An event indicating that the user has released a key on the keyboard.
LengthLimitingTextInputFormatter
A TextInputFormatter that prevents the insertion of more characters
than allowed.
LineBoundary
A TextBoundary subclass for locating closest line breaks to a given
position.
LineMetrics
LineMetrics stores the measurements and statistics of a single line in the
paragraph.
LiveText
Utility methods for interacting with the system's Live Text.
Locale
An identifier used to select a user's language and formatting preferences.
LocaleStringAttribute
A string attribute that causes the assistive technologies, e.g. VoiceOver,
to treat string as a certain language.
LogicalKeyboardKey
A class with static values that describe the keys that are returned from
RawKeyEvent.logicalKey .
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.
Matrix4
4D Matrix.
Values are stored in column major order.
MessageCodec <T >
A message encoding/decoding mechanism.
MethodCall
A command object representing the invocation of a named method.
MethodChannel
A named channel for communicating with platform plugins using asynchronous
method calls.
MethodCodec
A codec for method calls and enveloped results.
MouseCursor
An interface for mouse cursor definitions.
MouseCursorManager
Maintains the state of mouse cursors and manages how cursors are searched
for.
MouseCursorSession
Manages the duration that a pointing device should display a specific mouse
cursor.
MouseTrackerAnnotation
The annotation object used to annotate regions that are interested in mouse
movements.
MultiStreamController <T >
An enhanced stream controller provided by Stream.multi .
NetworkAssetBundle
An AssetBundle that loads resources over the network.
Offset
An immutable 2D floating-point offset.
OffsetBase
Base class for Size and Offset , which are both ways to describe
a distance as a two-dimensional axis-aligned vector.
OffsetEngineLayer
An opaque handle to an offset engine layer.
OpacityEngineLayer
An opaque handle to an opacity engine layer.
OptionalMethodChannel
A MethodChannel that ignores missing platform plugins.
Paint
A description of the style to use when drawing on a Canvas .
Paragraph
A paragraph of text.
ParagraphBoundary
A text boundary that uses paragraphs as logical boundaries.
ParagraphBuilder
Builds a Paragraph containing text with the given styling information.
ParagraphConstraints
Layout constraints for Paragraph objects.
ParagraphStyle
An opaque object that determines the configuration used by
ParagraphBuilder to position lines within a Paragraph of text.
Path
A complex, one-dimensional subset of a plane.
PathMetric
Utilities for measuring a Path and extracting sub-paths.
PathMetricIterator
Used by PathMetrics to track iteration from one segment of a path to the
next for measurement.
PathMetrics
An iterable collection of PathMetric objects describing a Path .
PhysicalKeyboardKey
A class with static values that describe the keys that are returned from
RawKeyEvent.physicalKey .
Picture
An object representing a sequence of recorded graphical operations.
PictureRecorder
Records a Picture containing a sequence of graphical operations.
PlatformAssetBundle
An AssetBundle that loads resources using platform messages.
PlatformDispatcher
Platform event dispatcher singleton.
PlatformViewController
An interface for controlling a single platform view.
PlatformViewsRegistry
A registry responsible for generating unique identifier for platform views.
PlatformViewsService
Provides access to the platform views service.
PluginUtilities
Functionality for Flutter plugin authors.
PointerData
Information about the state of a pointer.
PointerDataPacket
A sequence of reports about the state of pointers.
PointerEnterEvent
The pointer has moved with respect to the device while the pointer is or is
not in contact with the device, and it has entered a target object.
PointerEvent
Base class for touch, stylus, or mouse events.
PointerExitEvent
The pointer has moved with respect to the device while the pointer is or is
not in contact with the device, and exited a target object.
PointerHoverEvent
The pointer has moved with respect to the device while the pointer is not
in contact with the device.
PredictiveBackEvent
Object used to report back gesture progress in Android.
ProcessTextAction
A data structure describing text processing actions.
ProcessTextService
Determines how to interact with the text processing feature.
ProviderModel
Radius
A radius for either circular or elliptical shapes.
RawFloatingCursorPoint
The current state and position of the floating cursor.
RawKeyboard
An interface for listening to raw key events.
RawKeyDownEvent
The user has pressed a key on the keyboard.
RawKeyEvent
Defines the interface for raw key events.
RawKeyEventData
Base class for platform-specific key event data.
RawKeyEventDataAndroid
Platform-specific key event data for Android.
RawKeyEventDataFuchsia
Platform-specific key event data for Fuchsia.
RawKeyEventDataIos
Platform-specific key event data for iOS.
RawKeyEventDataLinux
Platform-specific key event data for Linux.
RawKeyEventDataMacOs
Platform-specific key event data for macOS.
RawKeyEventDataWeb
Platform-specific key event data for Web.
RawKeyEventDataWindows
Platform-specific key event data for Windows.
RawKeyUpEvent
The user has released a key on the keyboard.
ReadBuffer
Read-only buffer for reading sequentially from a ByteData instance.
Rect
An immutable, 2D, axis-aligned, floating-point rectangle whose coordinates
are relative to a given origin.
RestorationBucket
A RestorationBucket holds pieces of the restoration data that a part of
the application needs to restore its state.
RestorationManager
Manages the restoration data in the framework and synchronizes it with the
engine.
RootIsolateToken
A token that represents a root isolate.
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.
Scene
An opaque object representing a composited scene.
SceneBuilder
Builds a Scene containing the given visuals.
ScribbleClient
An interface to receive focus from the engine.
SelectionRect
Represents a selection rect for a character and it's position in the text.
SemanticsAction
The possible actions that can be conveyed from the operating system
accessibility APIs to a semantics node.
SemanticsActionEvent
An event to request a SemanticsAction of type to be performed on the
SemanticsNode identified by nodeId owned by the FlutterView identified
by viewId .
SemanticsFlag
A Boolean value that can be associated with a semantics node.
SemanticsUpdate
An opaque object representing a batch of semantics updates.
SemanticsUpdateBuilder
An object that creates SemanticsUpdate objects.
Shader
Base class for objects such as Gradient and ImageShader which
correspond to shaders as used by Paint.shader .
ShaderMaskEngineLayer
An opaque handle to a shader mask engine layer.
Shadow
A single shadow.
SingletonFlutterWindow
Deprecated. Will be removed in a future version of Flutter.
Size
Holds a 2D floating-point size.
SpellCheckResults
A data structure grouping together the SuggestionSpan s and related text of
results returned by a spell checker.
SpellCheckService
Determines how spell check results are received for text input.
SpellOutStringAttribute
A string attribute that causes the assistive technologies, e.g. VoiceOver,
to spell out the string character by character.
StandardMessageCodec
MessageCodec using the Flutter standard binary encoding.
StandardMethodCodec
MethodCodec using the Flutter standard binary encoding.
Stream <T >
A source of asynchronous data events.
StreamConsumer <S >
Abstract interface for a "sink" accepting multiple entire streams.
StreamController <T >
A controller with the stream it controls.
StreamIterator <T >
An Iterator -like interface for the values of a Stream .
StreamSink <S >
A object that accepts stream events both synchronously and asynchronously.
StreamSubscription <T >
A subscription on events from a Stream .
StreamTransformer <S , T >
Transforms a Stream.
StreamTransformerBase <S , T >
Base class for implementing StreamTransformer .
StreamView <T >
Stream wrapper that only exposes the Stream interface.
StringAttribute
An abstract interface for string attributes that affects how assistive
technologies, e.g. VoiceOver or TalkBack, treat the text.
StringCodec
MessageCodec with UTF-8 encoded String messages.
StrutStyle
See also:
SuggestionSpan
A data structure representing a range of misspelled text and the suggested
replacements for this range.
SurfaceAndroidViewController
Controls an Android view that is composed using a GL texture.
This controller is created from the PlatformViewsService.initSurfaceAndroidView factory,
and is defined for backward compatibility.
SynchronousStreamController <T >
A stream controller that delivers its events synchronously.
SystemChannels
Platform channels used by the Flutter system.
SystemChrome
Controls specific aspects of the operating system's graphical interface and
how it interacts with the application.
SystemMouseCursor
A mouse cursor that is natively supported on the platform that the
application is running on.
SystemMouseCursors
A collection of system MouseCursor s.
SystemNavigator
Controls specific aspects of the system navigation stack.
SystemSound
Provides access to the library of short system specific sounds for common
tasks.
SystemUiOverlayStyle
Specifies a preference for the style of the system overlays.
Tangent
The geometric description of a tangent: the angle at a point.
TargetImageSize
A specification of the size to which an image should be decoded.
TextBoundary
An interface for retrieving the logical text boundary (as opposed to the
visual boundary) at a given code unit offset in a document.
TextBox
A rectangle enclosing a run of text.
TextDecoration
A linear decoration to draw near the text.
TextEditingDelta
A structure representing a granular change that has occurred to the editing
state as a result of text editing.
TextEditingDeltaDeletion
A structure representing the deletion of a single/or contiguous sequence of
characters in an editing state.
TextEditingDeltaInsertion
A structure representing an insertion of a single/or contiguous sequence of
characters at some offset of an editing state.
TextEditingDeltaNonTextUpdate
A structure representing changes to the selection and/or composing regions
of an editing state and no changes to the text value.
TextEditingDeltaReplacement
A structure representing a replacement of a range of characters with a
new sequence of text.
TextEditingValue
The current text, selection, and composing state for editing a run of text.
TextHeightBehavior
Defines how to apply TextStyle.height over and under text.
TextInput
An low-level interface to the system's text input control.
TextInputConfiguration
Controls the visual appearance of the text input control.
TextInputConnection
An interface for interacting with a text input control.
TextInputFormatter
A TextInputFormatter can be optionally injected into an EditableText
to provide as-you-type validation and formatting of the text being edited.
TextInputType
The type of information for which to optimize the text input control.
TextLayoutMetrics
A read-only interface for accessing visual information about the
implementing text.
TextPosition
A position in a string of text.
A range of characters in a string of text.
TextSelection
A range of text that represents a selection.
TextStyle
An opaque object that determines the size, position, and rendering of text.
TextureAndroidViewController
Controls an Android view that is rendered as a texture.
This is typically used by AndroidView to display a View in the Android view hierarchy.
Timer
A countdown timer that can be configured to fire once or repeatedly.
TransformEngineLayer
An opaque handle to a transform engine layer.
UiKitViewController
Controller for an iOS platform view.
Uint8List
A fixed-length list of 8-bit unsigned integers.
UndoManager
A low-level interface to the system's undo manager.
Vertices
A set of vertex data used by Canvas.drawVertices .
ViewConstraints
Immutable layout constraints for FlutterView s.
ViewFocusEvent
An event for the engine to communicate view focus changes to the app.
ViewPadding
A representation of distances for each of the four edges of a rectangle,
used to encode the view insets and padding that applications should place
around their user interface, as exposed by FlutterView.viewInsets and
FlutterView.padding . View insets and padding are preferably read via
MediaQuery.of .
WriteBuffer
Write-only buffer for incrementally building a ByteData instance.
Zendesk2Chat
Zone
A zone represents an environment that remains stable across asynchronous
calls.
ZoneDelegate
An adapted view of the parent zone.
ZoneSpecification
A parameter object with custom zone function handlers for Zone.fork .
Extensions
FutureExtensions Future <T >
Convenience methods on futures.
FutureIterable Iterable <Future <T >
FutureRecord2 Future <T1 > Future <T2 >
Parallel operations on a record of futures.
FutureRecord3 Future <T1 > Future <T2 > Future <T3 >
Parallel operations on a record of futures.
FutureRecord4 Future <T1 > Future <T2 > Future <T3 > Future <T4 >
Parallel operations on a record of futures.
FutureRecord5 Future <T1 > Future <T2 > Future <T3 > Future <T4 > Future <T5 >
Parallel operations on a record of futures.
FutureRecord6 Future <T1 > Future <T2 > Future <T3 > Future <T4 > Future <T5 > Future <T6 >
Parallel operations on a record of futures.
FutureRecord7 Future <T1 > Future <T2 > Future <T3 > Future <T4 > Future <T5 > Future <T6 > Future <T7 >
Parallel operations on a record of futures.
FutureRecord8 Future <T1 > Future <T2 > Future <T3 > Future <T4 > Future <T5 > Future <T6 > Future <T7 > Future <T8 >
Parallel operations on a record of futures.
FutureRecord9 Future <T1 > Future <T2 > Future <T3 > Future <T4 > Future <T5 > Future <T6 > Future <T7 > Future <T8 > Future <T9 >
Parallel operations on a record of futures.
Constants
appFlavor → const String ?
The flavor this app was built with.
kAndroidNumPadMap → const Map <int LogicalKeyboardKey
A map of Android key codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kAndroidToLogicalKey → const Map <int LogicalKeyboardKey
Maps Android-specific key codes to the matching LogicalKeyboardKey.
kAndroidToPhysicalKey → const Map <int PhysicalKeyboardKey
Maps Android-specific scan codes to the matching PhysicalKeyboardKey.
keepToString → const pragma
Annotation to keep Object.toString overrides as-is instead of removing
them for size optimization purposes.
kFuchsiaToLogicalKey → const Map <int LogicalKeyboardKey
Maps Fuchsia-specific IDs to the matching LogicalKeyboardKey.
kFuchsiaToPhysicalKey → const Map <int PhysicalKeyboardKey
Maps Fuchsia-specific USB HID Usage IDs to the matching
PhysicalKeyboardKey.
kGlfwNumpadMap → const Map <int LogicalKeyboardKey
A map of GLFW key codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kGlfwToLogicalKey → const Map <int LogicalKeyboardKey
Maps GLFW-specific key codes to the matching LogicalKeyboardKey.
kGtkNumpadMap → const Map <int LogicalKeyboardKey
A map of GTK key codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kGtkToLogicalKey → const Map <int LogicalKeyboardKey
Maps GTK-specific key codes to the matching LogicalKeyboardKey.
kIosNumPadMap → const Map <int LogicalKeyboardKey
A map of iOS key codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kIosSpecialLogicalMap → const Map <String LogicalKeyboardKey
Maps iOS specific string values of nonvisible keys to logical keys
kIosToLogicalKey → const Map <int LogicalKeyboardKey
A map of iOS key codes presenting LogicalKeyboardKey.
kIosToPhysicalKey → const Map <int PhysicalKeyboardKey
Maps iOS-specific key code values representing PhysicalKeyboardKey.
kLinuxToPhysicalKey → const Map <int PhysicalKeyboardKey
Maps XKB specific key code values representing PhysicalKeyboardKey.
kMacOsFunctionKeyMap → const Map <int LogicalKeyboardKey
A map of macOS key codes which are numbered function keys, so that they
can be excluded when asking "is the Fn modifier down?".
kMacOsNumPadMap → const Map <int LogicalKeyboardKey
A map of macOS key codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kMacOsToLogicalKey → const Map <int LogicalKeyboardKey
A map of macOS key codes presenting LogicalKeyboardKey.
kMacOsToPhysicalKey → const Map <int PhysicalKeyboardKey
Maps macOS-specific key code values representing PhysicalKeyboardKey.
kProfilePlatformChannels → const bool
Controls whether platform channel usage can be debugged in release mode.
kWebLocationMap → const Map <String List <LogicalKeyboardKey ?
A map of Web KeyboardEvent keys which needs to be decided based on location,
typically for numpad keys and modifier keys. Used to provide different key
objects for keys like KEY_EQUALS and NUMPAD_EQUALS.
kWebNumPadMap → const Map <String LogicalKeyboardKey
A map of Web KeyboardEvent codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kWebToLogicalKey → const Map <String LogicalKeyboardKey
Maps Web KeyboardEvent codes to the matching LogicalKeyboardKey.
kWebToPhysicalKey → const Map <String PhysicalKeyboardKey
Maps Web KeyboardEvent codes to the matching PhysicalKeyboardKey.
kWindowsNumPadMap → const Map <int LogicalKeyboardKey
A map of Windows KeyboardEvent codes which have printable representations, but appear
on the number pad. Used to provide different key objects for keys like
KEY_EQUALS and NUMPAD_EQUALS.
kWindowsToLogicalKey → const Map <int LogicalKeyboardKey
Maps Windows KeyboardEvent codes to the matching LogicalKeyboardKey.
kWindowsToPhysicalKey → const Map <int PhysicalKeyboardKey
Maps Windows KeyboardEvent codes to the matching PhysicalKeyboardKey.
Functions
clampDouble (double x , double min , double max → double
Same as num.clamp but optimized for a non-null double .
debugAssertAllServicesVarsUnset (String reason → bool
Returns true if none of the widget library debug variables have been changed.
debugIsSerializableForRestoration (Object ?object → bool
Returns true when the provided object is serializable for state
restoration.
decodeImageFromList (Uint8List list , ImageDecoderCallback callback → void
Loads a single image frame from a byte array into an Image object.
decodeImageFromPixels (Uint8List pixels , int width , int height , PixelFormat format , ImageDecoderCallback callback , {int ?rowBytes , int ?targetWidth , int ?targetHeight , bool allowUpscaling = true → void
Convert an array of pixel values into an Image object.
hashList (Iterable <Object ? ?arguments → int
Combine the Object.hashCode values of an arbitrary number of objects from
an Iterable into one value. This function will return the same value if
given null as if given an empty list.
hashValues (Object ?arg01 , Object ?arg02 , [Object ?arg03 = _hashEnd , Object ?arg04 = _hashEnd , Object ?arg05 = _hashEnd , Object ?arg06 = _hashEnd , Object ?arg07 = _hashEnd , Object ?arg08 = _hashEnd , Object ?arg09 = _hashEnd , Object ?arg10 = _hashEnd , Object ?arg11 = _hashEnd , Object ?arg12 = _hashEnd , Object ?arg13 = _hashEnd , Object ?arg14 = _hashEnd , Object ?arg15 = _hashEnd , Object ?arg16 = _hashEnd , Object ?arg17 = _hashEnd , Object ?arg18 = _hashEnd , Object ?arg19 = _hashEnd , Object ?arg20 = _hashEnd → int
Combine up to twenty objects' hash codes into one value.
instantiateImageCodec (Uint8List list , {int ?targetWidth , int ?targetHeight , bool allowUpscaling = true → Future <Codec
Instantiates an image Codec .
instantiateImageCodecFromBuffer (ImmutableBuffer buffer , {int ?targetWidth , int ?targetHeight , bool allowUpscaling = true → Future <Codec
Instantiates an image Codec .
instantiateImageCodecWithSize (ImmutableBuffer buffer , {TargetImageSizeCallback ?getTargetSize → Future <Codec
Instantiates an image Codec .
lerpDouble (num ?a , num ?b , double t → double ?
Linearly interpolate between two numbers, a and b, by an extrapolation
factor t.
loadFontFromList (Uint8List list , {String ?fontFamily → Future <void >
Loads a font from a buffer and makes it available for rendering text.
runeToLowerCase (int rune → int
Convert a UTF32 rune to its lower case.
runOnPlatformThread <R > (FutureOr <R > computation ()→ Future <R >
Runs computation on the platform thread and returns the result.
runZoned <R > (R body (), {Map <Object ?Object ? ?zoneValues , ZoneSpecification ?zoneSpecification , Function ?onError → R
Runs body in its own zone.
runZonedGuarded <R > (R body (), void onError (Object error , StackTrace stack Map <Object ?Object ? ?zoneValues , ZoneSpecification ?zoneSpecification → R?
Runs body in its own error zone.
scheduleMicrotask (void callback ()→ void
Runs a function asynchronously.
unawaited (Future <void > ?future → void
Explicitly ignores a future.
Typedefs
ChannelCallback
= void Function(ByteData ?data , PlatformMessageResponseCallback callback
Signature for ChannelBuffers.setListener 's callback argument.
ControllerCallback
= void Function()
Type of a stream controller's onListen, onPause and onResume
callbacks.
ControllerCancelCallback
= FutureOr <void > Function()
Type of stream controller onCancel callbacks.
CreatePeriodicTimerHandler
= Timer Function(Zone self , ZoneDelegate parent , Zone zone , Duration period , void f (Timer timer
The type of a custom Zone.createPeriodicTimer implementation function.
CreateTimerHandler
= Timer Function(Zone self , ZoneDelegate parent , Zone zone , Duration duration , void f ()
The type of a custom Zone.createTimer implementation function.
DrainChannelCallback
= Future <void > Function(ByteData ?data , PlatformMessageResponseCallback callback
Deprecated. Migrate to ChannelCallback instead.
ErrorCallback
= bool Function(Object exception , StackTrace stackTrace
Signature for PlatformDispatcher.onError .
ErrorCallbackHandler
= AsyncError ? Function(Zone self , ZoneDelegate parent , Zone zone , Object error , StackTrace ?stackTrace
The type of a custom Zone.errorCallback implementation function.
ForkHandler
= Zone Function(Zone self , ZoneDelegate parent , Zone zone , ZoneSpecification ?specification , Map <Object ?Object ? ?zoneValues
The type of a custom Zone.fork implementation function.
FrameCallback
= void Function(Duration duration
Signature for PlatformDispatcher.onBeginFrame .
HandleUncaughtErrorHandler
= void Function(Zone self , ZoneDelegate parent , Zone zone , Object error , StackTrace stackTrace
The type of a custom Zone.handleUncaughtError implementation function.
ImageDecoderCallback
= void Function(Image result
Callback signature for decodeImageFromList .
ImageEventCallback
= void Function(Image image
Signature for Image lifecycle events.
KeyDataCallback
= bool Function(KeyData data
Signature for PlatformDispatcher.onKeyData .
KeyEventCallback
= bool Function(KeyEvent event
The signature for HardwareKeyboard.addHandler , a callback to decide whether
the entire framework handles a key event.
KeyMessageHandler
= bool Function(KeyMessage message
The signature for KeyEventManager.keyMessageHandler .
MessageHandler
= Future <ByteData ? ? Function(ByteData ?message
A function which takes a platform message and asynchronously returns an encoded response.
PictureEventCallback
= void Function(Picture picture
Signature for Picture lifecycle events.
PlatformMessageCallback
= void Function(String name , ByteData ?data , PlatformMessageResponseCallback ?callback
Deprecated. Migrate to ChannelBuffers.setListener instead.
PlatformMessageResponseCallback
= void Function(ByteData ?data
Signature for responses to platform messages.
PlatformViewCreatedCallback
= void Function(int id
Callback signature for when a platform view was created.
PointerDataPacketCallback
= void Function(PointerDataPacket packet
Signature for PlatformDispatcher.onPointerDataPacket .
PointerEnterEventListener
= void Function(PointerEnterEvent event
Signature for listening to PointerEnterEvent events.
PointerExitEventListener
= void Function(PointerExitEvent event
Signature for listening to PointerExitEvent events.
PointerHoverEventListener
= void Function(PointerHoverEvent event
Signature for listening to PointerHoverEvent events.
PointTransformer
= Offset Function(Offset position
Converts a given point from the global coordinate system in logical pixels
to the local coordinate system for a box.
PrintHandler
= void Function(Zone self , ZoneDelegate parent , Zone zone , String line
The type of a custom Zone.print implementation function.
RawKeyEventHandler
= bool Function(RawKeyEvent event
A callback type used by RawKeyboard.keyEventHandler to send key events to
a handler that can determine if the key has been handled or not.
RegisterBinaryCallbackHandler
= ZoneBinaryCallback <R , T1 , T2 > Function<R , T1 , T2 >(Zone self , ZoneDelegate parent , Zone zone , R f (T1 arg1 , T2 arg2
The type of a custom Zone.registerBinaryCallback implementation function.
RegisterCallbackHandler
= ZoneCallback <R > Function<R >(Zone self , ZoneDelegate parent , Zone zone , R f ()
The type of a custom Zone.registerCallback implementation function.
RegisterUnaryCallbackHandler
= ZoneUnaryCallback <R , T > Function<R , T >(Zone self , ZoneDelegate parent , Zone zone , R f (T arg
The type of a custom Zone.registerUnaryCallback implementation function.
RunBinaryHandler
= R Function<R , T1 , T2 >(Zone self , ZoneDelegate parent , Zone zone , R f (T1 arg1 , T2 arg2 T1 arg1 , T2 arg2
The type of a custom Zone.runBinary implementation function.
RunHandler
= R Function<R >(Zone self , ZoneDelegate parent , Zone zone , R f ()
The type of a custom Zone.run implementation function.
RunUnaryHandler
= R Function<R , T >(Zone self , ZoneDelegate parent , Zone zone , R f (T arg T arg
The type of a custom Zone.runUnary implementation function.
ScheduleMicrotaskHandler
= void Function(Zone self , ZoneDelegate parent , Zone zone , void f ()
The type of a custom Zone.scheduleMicrotask implementation function.
SemanticsActionEventCallback
= void Function(SemanticsActionEvent action
Signature for PlatformDispatcher.onSemanticsActionEvent .
SystemUiChangeCallback
= Future <void > Function(bool systemOverlaysAreVisible
Signature for listening to changes in the SystemUiMode .
TargetImageSizeCallback
= TargetImageSize Function(int intrinsicWidth , int intrinsicHeight
Signature for a callback that determines the size to which an image should
be decoded given its intrinsic size.
TextInputFormatFunction
= TextEditingValue Function(TextEditingValue oldValue , TextEditingValue newValue
Function signature expected for creating custom TextInputFormatter
shorthands via TextInputFormatter.withFunction .
TimingsCallback
= void Function(List <FrameTiming timings
Signature for PlatformDispatcher.onReportTimings .
UntilPredicate
= bool Function(int offset , bool forward
Signature for a predicate that takes an offset into a UTF-16 string, and a
boolean that indicates the search direction.
ValueChanged T >
= void Function(T value
Signature for callbacks that report that an underlying value has changed.
ViewFocusChangeCallback
= void Function(ViewFocusEvent viewFocusEvent
Signature for PlatformDispatcher.onViewFocusChange .
VoidCallback
= void Function()
Signature of callbacks that have no arguments and return no data.
WindowPadding ViewPadding
Deprecated. Will be removed in a future version of Flutter.
ZoneBinaryCallback R , T1 , T2 >
= R Function(T1 , T2
ZoneCallback R >
= R Function()
ZoneUnaryCallback R , T >
= R Function(T
