RenderingFlutterBinding class

A concrete binding for applications that use the Rendering framework directly. This is the glue that binds the framework to the Flutter engine.

You would only use this binding if you are writing to the rendering layer directly. If you are writing to a higher-level library, such as the Flutter Widgets library, then you would use that layer's binding.

See also BindingBase.



RenderingFlutterBinding({RenderBox root })
Creates a binding for the rendering layer. [...]


accessibilityFeatures AccessibilityFeatures
The currently active set of AccessibilityFeatures. [...]
read-only, inherited
currentFrameTimeStamp Duration
The time stamp for the frame currently being processed. [...]
read-only, inherited
disableAnimations bool
Whether the device is requesting that animations be disabled.
read-only, inherited
endOfFrame Future<Null>
Returns a Future that completes after the frame completes. [...]
read-only, inherited
framesEnabled bool
Whether frames are currently being scheduled when scheduleFrame is called. [...]
read-only, inherited
gestureArena GestureArenaManager
The gesture arenas used for disambiguating the meaning of sequences of pointer events.
final, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
hasScheduledFrame bool
Whether this scheduler has requested that handleBeginFrame be called soon.
read-only, inherited
lifecycleState AppLifecycleState
Whether the application is visible, and if so, whether it is currently interactive. [...]
read-only, inherited
locked bool
Whether lockEvents is currently locking events. [...]
@protected, read-only, inherited
pipelineOwner PipelineOwner
The render tree's owner, which maintains dirty state for layout, composite, paint, and accessibility semantics
read-only, inherited
pointerRouter PointerRouter
A router that routes all pointer events received from the engine.
final, inherited
renderView RenderView
The render tree that's attached to the output surface.
read / write, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
schedulerPhase SchedulerPhase
The phase that the scheduler is currently operating under.
read-only, inherited
schedulingStrategy SchedulingStrategy
The strategy to use when deciding whether to run a task or not. [...]
read / write, inherited
transientCallbackCount int
The current number of transient frame callbacks scheduled. [...]
read-only, inherited


addPersistentFrameCallback(FrameCallback callback) → void
Adds a persistent frame callback. [...]
addPostFrameCallback(FrameCallback callback) → void
Schedule a callback for the end of this frame. [...]
cancelFrameCallbackWithId(int id) → void
Cancels the transient frame callback with the given id. [...]
cancelPointer(int pointer) → void
Dispatch a PointerCancelEvent for the given pointer soon. [...]
createViewConfiguration() ViewConfiguration
Returns a ViewConfiguration configured for the RenderView based on the current environment. [...]
debugAssertNoTransientCallbacks(String reason) bool
Asserts that there are no registered transient callbacks; if there are, prints their locations and throws an exception. [...]
dispatchEvent(PointerEvent event, HitTestResult result) → void
Dispatch an event to a hit test result's path. [...]
drawFrame() → void
Pump the rendering pipeline to generate a frame. [...]
@protected, inherited
ensureVisualUpdate() → void
Schedules a new frame using scheduleFrame if this object is not currently producing a frame. [...]
evict(String asset) → void
Called in response to the ext.flutter.evict service extension. [...]
@mustCallSuper, @protected, inherited
handleAccessibilityFeaturesChanged() → void
Called when the platform accessibility features change. [...]
@protected, inherited
handleAppLifecycleStateChanged(AppLifecycleState state) → void
Called when the application lifecycle state changes. [...]
@mustCallSuper, @protected, inherited
handleBeginFrame(Duration rawTimeStamp) → void
Called by the engine to prepare the framework to produce a new frame. [...]
handleDrawFrame() → void
Called by the engine to produce a new frame. [...]
handleEvent(PointerEvent event, HitTestEntry entry) → void
Override this method to receive events.
handleEventLoopCallback() bool
Execute the highest-priority task, if it is of a high enough priority. [...]
@visibleForTesting, inherited
handleMetricsChanged() → void
Called when the system metrics change. [...]
@protected, inherited
handleTextScaleFactorChanged() → void
Called when the platform text scale factor changes. [...]
@protected, inherited
hitTest(HitTestResult result, Offset position) → void
Check whether the given position hits this object. [...]
initInstances() → void
The initialization method. Subclasses override this method to hook into the platform and otherwise configure their services. Subclasses must call "super.initInstances()". [...]
initLicenses() → void
Adds relevant licenses to the LicenseRegistry. [...]
@mustCallSuper, @protected, inherited
initRenderView() → void
Creates a RenderView object to be the root of the RenderObject rendering tree, and initializes it so that it will be rendered when the engine is next ready to display a frame. [...]
initServiceExtensions() → void
Called when the binding is initialized, to register service extensions. [...]
lockEvents(Future<Null> callback()) Future<Null>
Locks the dispatching of asynchronous events and callbacks until the callback's future completes. [...]
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
@pragma('vm:entry-point'), inherited
performReassemble() Future<Null>
This method is called by reassembleApplication to actually cause the application to reassemble, e.g. after a hot reload. [...]
reassembleApplication() Future<Null>
Cause the entire application to redraw, e.g. after a hot reload. [...]
registerBoolServiceExtension({String name, AsyncValueGetter<bool> getter, AsyncValueSetter<bool> setter }) → void
Registers a service extension method with the given name (full name ""), which takes a single argument "enabled" which can have the value "true" or the value "false" or can be omitted to read the current value. (Any value other than "true" is considered equivalent to "false". Other arguments are ignored.) [...]
@protected, inherited
registerNumericServiceExtension({String name, AsyncValueGetter<double> getter, AsyncValueSetter<double> setter }) → void
Registers a service extension method with the given name (full name ""), which takes a single argument with the same name as the method which, if present, must have a value that can be parsed by double.parse, and can be omitted to read the current value. (Other arguments are ignored.) [...]
@protected, inherited
registerServiceExtension({String name, ServiceExtensionCallback callback }) → void
Registers a service extension method with the given name (full name ""). The given callback is called when the extension method is called. The callback must return a Future that either eventually completes to a return value in the form of a name/value map where the values can all be converted to JSON using json.encode() (see JsonEncoder), or fails. In case of failure, the failure is reported to the remote caller and is dumped to the logs. [...]
@protected, inherited
registerSignalServiceExtension({String name, AsyncCallback callback }) → void
Registers a service extension method with the given name (full name ""), which takes no arguments and returns no value. [...]
@protected, inherited
registerStringServiceExtension({String name, AsyncValueGetter<String> getter, AsyncValueSetter<String> setter }) → void
Registers a service extension method with the given name (full name ""), which optionally takes a single argument with the name "value". If the argument is omitted, the value is to be read, otherwise it is to be set. Returns the current value. [...]
@protected, inherited
resetEpoch() → void
Prepares the scheduler for a non-monotonic change to how time stamps are calculated. [...]
scheduleForcedFrame() → void
Schedules a new frame by calling Window.scheduleFrame. [...]
scheduleFrame() → void
If necessary, schedules a new frame by calling Window.scheduleFrame. [...]
scheduleFrameCallback(FrameCallback callback, { bool rescheduling: false }) int
Schedules the given transient frame callback. [...]
scheduleTask<T>(TaskCallback<T> task, Priority priority, { String debugLabel, Flow flow }) Future<T>
Schedules the given task with the given priority and returns a Future that completes to the task's eventual return value. [...]
scheduleWarmUpFrame() → void
Schedule a frame to run as soon as possible, rather than waiting for the engine to request a frame in response to a system "Vsync" signal. [...]
setSemanticsEnabled(bool enabled) → void
Whether the render tree associated with this binding should produce a tree of SemanticsNode objects.
toString() String
Returns a string representation of this object.
unlocked() → void
Called by lockEvents when events get unlocked. [...]


operator ==(dynamic other) bool
The equality operator. [...]