AnimatedRotation class Null safety

Animated version of Transform.rotate which automatically transitions the child's rotation over a given duration whenever the given rotation changes.

link
This code defines a widget that uses AnimatedRotation to rotate a FlutterLogo gradually by an eighth of a turn (45 degrees) with each press of the button. 
class LogoRotate extends StatefulWidget {
  const LogoRotate({Key? key}) : super(key: key);

  @override
  State<LogoRotate> createState() => LogoRotateState();
}

class LogoRotateState extends State<LogoRotate> {
  double turns = 0.0;

  void _changeRotation() {
    setState(() => turns += 1.0 / 8.0);
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        ElevatedButton(
          onPressed: _changeRotation,
          child: const Text('Rotate Logo'),
        ),
        Padding(
          padding: const EdgeInsets.all(50),
          child: AnimatedRotation(
            turns: turns,
            duration: const Duration(seconds: 1),
            child: const FlutterLogo(),
          ),
        ),
      ],
    );
  }
}

See also:

Inheritance

Constructors

AnimatedRotation({Key? key, Widget? child, required double turns, Alignment alignment = Alignment.center, FilterQuality? filterQuality, Curve curve = Curves.linear, required Duration duration, VoidCallback? onEnd})
Creates a widget that animates its rotation implicitly. [...]
const

Properties

alignment → Alignment
The alignment of the origin of the coordinate system in which the rotation takes place, relative to the size of the box. [...]
final
child → Widget?
The widget below this widget in the tree. [...]
final
curve → Curve
The curve to apply when animating the parameters of this container.
final, inherited
duration → Duration
The duration over which to animate the parameters of this container.
final, inherited
filterQuality → FilterQuality?
The filter quality with which to apply the transform as a bitmap operation. [...]
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
onEnd → VoidCallback?
Called every time an animation completes. [...]
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
turns → double
The animation that controls the rotation of the child. [...]
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
createState() → ImplicitlyAnimatedWidgetState<AnimatedRotation>
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. [...]
override
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