AnimatedContainer class

A container that gradually changes its values over a period of time.

The AnimatedContainer will automatically animate between the old and new values of properties when they change using the provided curve and duration. Properties that are null are not animated.

This class is useful for generating simple implicit transitions between different parameters to Container with its internal AnimationController. For more complex animations, you'll likely want to use a subclass of AnimatedWidget such as the DecoratedBoxTransition or use your own AnimationController.

Here's an illustration of what using this widget looks like, using a curve of Curves.fastOutSlowIn.

See also:

Inheritance

Constructors

AnimatedContainer({Key key, AlignmentGeometry alignment, EdgeInsetsGeometry padding, Color color, Decoration decoration, Decoration foregroundDecoration, double width, double height, BoxConstraints constraints, EdgeInsetsGeometry margin, Matrix4 transform, Widget child, Curve curve: Curves.linear, @required Duration duration })
Creates a container that animates its parameters implicitly. [...]

Properties

alignment → AlignmentGeometry
Align the child within the container. [...]
final
child → Widget
The child contained by the container. [...]
final
constraints → BoxConstraints
Additional constraints to apply to the child. [...]
final
decoration → Decoration
The decoration to paint behind the child. [...]
final
foregroundDecoration → Decoration
The decoration to paint in front of the child.
final
margin → EdgeInsetsGeometry
Empty space to surround the decoration and child.
final
padding → EdgeInsetsGeometry
Empty space to inscribe inside the decoration. The child, if any, is placed inside this padding.
final
transform → Matrix4
The transformation matrix to apply before painting the container.
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
hashCode → int
The hash code for this object. [...]
read-only, inherited
key → Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

createState() → _AnimatedContainerState
Creates the mutable state for this widget at a given location in the tree. [...]
override
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
override
createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, 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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns 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 ==(dynamic other) → bool
The equality operator. [...]
inherited