AScale class

Physics-based equivalent of AnimatedScale, renamed to AScale.

Animates changes in scale using physics-based animations, providing natural-feeling scaling effects. This is particularly useful for interactive UI elements that need to scale in response to user input.

{@macro ImplicitlyPhysicsAnimatedWidget}

{@tool snippet} This example shows a widget that bounces between two scales when tapped:

class _MyWidget extends StatefulWidget {
  @override
  State<_MyWidget> createState() => _MyWidgetState();
}

class _MyWidgetState extends State<_MyWidget> {
  bool _enlarged = false;

  @override
  Widget build(BuildContext context) {
    return AScale(
      physics: Spring.snap,
      scale: _enlarged ? 1.5 : 1.0,
      alignment: Alignment.center,
      child: GestureDetector(
        onTap: () => setState(() => _enlarged = !_enlarged),
        child: Container(
          width: 100,
          height: 100,
          color: Colors.blue,
          child: const Center(child: Text('Tap me!')),
        ),
      ),
    );
  }
}

{@end-tool}

Performance Considerations

Scale animations are generally more performant than opacity animations
Consider using filterQuality to improve scaled image quality
Large scale factors may impact performance due to increased pixel processing

Constructors

AScale.new({Key? key, required double scale, Widget? child, Alignment alignment = Alignment.center, FilterQuality? filterQuality, Duration? duration, Physics? physics, VoidCallback? onEnd}): Creates a new AScale. Physics-based equivalent of AnimatedScale, renamed to AScale.
const

Properties

alignment → Alignment: final
child → Widget?: final
duration → Duration?: The duration of the animation.
finalinherited
filterQuality → FilterQuality?: final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
onEnd → VoidCallback?: A callback that is called when an animation completes.
finalinherited
physics → Physics?: The physics or curve that controls how the animation moves.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
scale → double: final

Methods

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