AlignTransition class Null safety

Animated version of an Align that animates its Align.alignment property.

Here's an illustration of the DecoratedBoxTransition widget, with it's DecoratedBoxTransition.decoration animated by a CurvedAnimation set to Curves.decelerate:

link
The following code implements the AlignTransition as seen in the video above:
To create a local project with this code sample, run:
flutter create --sample=widgets.AlignTransition.1 mysample

See also:

  • AnimatedAlign, which animates changes to the alignment without taking an explicit Animation argument.
  • PositionedTransition, a widget that animates its child from a start position to an end position over the lifetime of the animation.
  • RelativePositionedTransition, a widget that transitions its child's position based on the value of a rectangle relative to a bounding box.
  • SizeTransition, a widget that animates its own size and clips and aligns its child.
  • SlideTransition, a widget that animates the position of a widget relative to its normal position.
Inheritance

Constructors

AlignTransition({Key? key, required Animation<AlignmentGeometry> alignment, required Widget child, double? widthFactor, double? heightFactor})
Creates an animated Align whose AlignmentGeometry animation updates the widget.
const

Properties

alignment → Animation<AlignmentGeometry>
The animation that controls the child's alignment.
read-only
child → Widget
The widget below this widget in the tree.
final
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
heightFactor → double?
If non-null, the child's height factor, see Align.heightFactor.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
listenable → Listenable
The Listenable to which this widget is listening.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
widthFactor → double?
If non-null, the child's width factor, see Align.widthFactor.
final

Methods

build(BuildContext context) → Widget
Override this method to build widgets that depend on the state of the listenable (e.g., the current value of the animation).
override
createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<AnimatedWidget>
Subclasses typically do not override this method.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
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">@nonVirtualinherited