ShaderTransitionSwitcher class

An AnimatedSwitcher analog that runs a ShaderTransition between two child widgets instead of between routes.

When child is replaced by a widget that Widget.canUpdate reports as different (different runtime type or Key), the old child is shader- masked away and the new one revealed, driven by an internal controller of transition.duration. Key your children so swaps are detected:

ShaderTransitionSwitcher(
  transition: const CircleTransition(),
  onStart: () => audio.play('whoosh'),
  child: KeyedSubtree(
    key: ValueKey(pageIndex),
    child: pages[pageIndex],
  ),
)

onStart / onComplete / onProgress fire per swap — use onStart to trigger your own sound (this package bundles no audio).

Inheritance

Constructors

ShaderTransitionSwitcher({Key? key, required Widget child, ShaderTransition transition = const DiamondTransition(), VoidCallback? onStart, VoidCallback? onComplete, ValueChanged<double>? onProgress})
const

Properties

child → Widget
The current child. Replace it (with a distinct key/type) to animate.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onComplete → VoidCallback?
Called when a swap animation completes.
final
onProgress → ValueChanged<double>?
Called every tick with progress in [0, 1].
final
onStart → VoidCallback?
Called when a swap animation starts.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
transition → ShaderTransition
The transition used for each swap.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<ShaderTransitionSwitcher>
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