FadeTransitionModifier class

Animates the opacity of a widget.

For a widget that automatically animates between the sizes of two children, fading between them, see AnimatedCrossFade.

Here's an illustration of the FadeTransition widget, with it's opacity animated by a CurvedAnimation set to Curves.fastOutSlowIn:

{@tool dartpad} The following code implements the FadeTransition using the Flutter logo:

** See code in examples/api/lib/widgets/transitions/fade_transition.0.dart ** {@end-tool}

See also:

• Opacity, which does not animate changes in opacity.
• AnimatedOpacity, which animates changes in opacity without taking an explicit Animation argument.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• SingleChildStatelessModifier
• FadeTransitionModifier

Available extensions

• ModifierTransformer

Constructors

FadeTransitionModifier({Key? key, Widget? child, Key? modifierKey, required Animation<double> opacity, bool alwaysIncludeSemantics = false})

Creates an opacity transition.

const

Properties

alwaysIncludeSemantics → bool

Whether the semantic information of the children is always included.

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

modifierKey → Key?

The actual key of the widget, which Modifier wrapped

final, inherited

opacity → Animation<double>

The animation that controls the opacity of the child.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

inherited

buildWithChild(BuildContext context, Widget? child) → Widget

A build method that receives an extra child parameter.

override

createElement() → SingleChildStatelessElement

Create a SingleChildStatelessElement

inherited

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.

inherited

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}) → 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