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}) → 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