AnimatedAlign class
Animated version of Align which automatically transitions the child's position over a given duration whenever the given alignment changes.
Here's an illustration of what this can look like, using a curve of Curves.fastOutSlowIn.
For the animation, you can choose a curve as well as a duration and the widget will automatically animate to the new target alignment. If you require more control over the animation (e.g. if you want to stop it mid-animation), consider using an AlignTransition instead, which takes a provided Animation as argument. While that allows you to fine-tune the animation, it also requires more development overhead as you have to manually manage the lifecycle of the underlying AnimationController.
To create a local project with this code sample, run:
flutter create --sample=widgets.AnimatedAlign.1 mysample
See also:
- AnimatedContainer, which can transition more values at once.
- AnimatedPadding, which can animate the padding instead of the alignment.
- AnimatedSlide, which can animate the translation of child by a given offset relative to its size.
- AnimatedPositioned, which, as a child of a Stack, automatically transitions its child's position over a given duration whenever the given position changes.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ImplicitlyAnimatedWidget
- AnimatedAlign
Constructors
- AnimatedAlign({Key? key, required AlignmentGeometry alignment, Widget? child, double? heightFactor, double? widthFactor, Curve curve = Curves.linear, required Duration duration, VoidCallback? onEnd})
- Creates a widget that positions its child by an alignment that animates implicitly. const
Properties
- alignment → AlignmentGeometry
- How to align the child. 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. finalinherited
- duration → Duration
- The duration over which to animate the parameters of this container. finalinherited
- hashCode → int
- The hash code for this object. no setterinherited
- heightFactor → double?
- If non-null, sets its height to the child's height multiplied by this factor. final
- key → Key?
- Controls how one widget replaces another widget in the tree. finalinherited
- onEnd → VoidCallback?
- Called every time an animation completes. finalinherited
- runtimeType → Type
- A representation of the runtime type of the object. no setterinherited
- widthFactor → double?
- If non-null, sets its width to the child's width multiplied by this factor. final
Methods
- createElement(
) → StatefulElement - Creates a StatefulElement to manage this widget's location in the tree. inherited
- createState(
) → AnimatedWidgetBaseState< AnimatedAlign> - 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