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.
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:
- AnimatedScale, for animating the scale of a child.
- RotationTransition, an explicitly animated version of this widget, where an Animation is provided by the caller instead of being built in.
- Inheritance
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ImplicitlyAnimatedWidget
- AnimatedRotation
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