RasterWidgetController class Null safety

A controller for the RasterWidget that controls when the child image is displayed and when to regenerated the child image.

When the value of rasterize is true, the RasterWidget will paint the child widgets based on the RasterizeMode of the raster widget.

To force RasterWidget to recreate the child image, call clear.

Inheritance

Constructors

RasterWidgetController({bool rasterize = false})
Create a new RasterWidgetController.

Properties

hashCode int
The hash code for this object.
read-onlyinherited
hasListeners bool
Whether any listeners are currently registered.
protected">@protectedread-onlyinherited
rasterize bool
Whether a rasterized version of this render objects child is drawn in place of the child.
read / write
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
clear() → void
Reset the raster held by any listening RasterWidget.
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
mustCallSuper">@mustCallSuperinherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
protected">@protectedvisibleForTesting">@visibleForTestinginherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
toString() String
A string representation of this object.
inherited

Operators

operator ==(Object other) bool
The equality operator.
inherited