Rendering class

Widget to easily create a continuous animation.

You need to specify a builder function that gets the build context passed along with the timeElapsed (as a Duration) since the rendering started. You can use this time to specify custom animations on it.

The builder rebuilds all sub-widgets every frame.

You define an onTick function that is called before builder to update you rendered scene. It's also utilized during fast-forwarding the animation.

Specify a startTime to fast-forward your animation in the beginning. The widget will interpolate the animation by calling the onTick function multiple times. (Default value is 20. You can tune it by setting the startTimeSimulationTicks property.)

Inheritance
Annotations
  • @Deprecated('See migration guide: https://pub.dev/packages/sa_v1_migration')

Constructors

Rendering({Widget builder(BuildContext context, Duration timeElapsed), dynamic onTick(Duration timeElapsed), Duration startTime = Duration.zero, int startTimeSimulationTicks = 20})

Properties

builder Widget Function(BuildContext context, Duration timeElapsed)
final
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
onTick → dynamic Function(Duration timeElapsed)
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
startTime Duration
final
startTimeSimulationTicks int
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
createState() → _RenderingState
Creates the mutable state for this widget at a given location in the tree. [...]
override
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object. [...]
inherited
toStringDeep({String prefixLineOne = '', String prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants. [...]
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object. [...]
inherited
toStringShort() String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
@nonVirtual, inherited