SnowfallRendering 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
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- SnowfallRendering
Constructors
- SnowfallRendering({required Widget builder(BuildContext context, Duration timeElapsed), required dynamic onTick(Duration timeElapsed), Duration startTime = Duration.zero, int startTimeSimulationTicks = 20, Key? key})
-
const
Properties
- builder → Widget Function(BuildContext context, Duration timeElapsed)
-
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onTick → dynamic Function(Duration timeElapsed)
-
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- startTime → Duration
-
final
- startTimeSimulationTicks → int
-
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → _SnowfallRenderingState -
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.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent 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, int wrapWidth = 65}) → 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.
inherited