AnimationComponent class

Defines builder that returns a Widget acts as a container that is capable of animation.

Additionally, this Component is responsible for enforcing the menu constraints, pre-calculated constraints by MenuPositionAndSizeComponent are passed as AnimationComponentData.constraints.

Implicit animations work well. However, explicit animation might require this component to be extended so that more instance variables can be introduced. For instance, you might want to store an AnimationController as an instance variable.

Example

AnimationComponent(
  builder: (AnimationComponentData data)
  {
    return Opacity(
      opacity: data.menuState == MenuAnimationState.OpeningEnd ? 1.0 : 0.0,
      child: data.child,
    );
  }
);

A series of detailed examples are available here.

See ComponentsConfiguration for more details.

See Also:

• AnimationComponentData
• AnimationBuilder

Implementers

• DialogAnimationComponent
• DropdownAnimationComponent

Constructors

AnimationComponent({AnimationBuilder? builder})

See AnimationBuilder.

Properties

builder ↔ AnimationBuilder?

A builder method to create the animating Widget.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(AnimationComponentData data) → Widget

The method uses the AnimationComponent.builder method to actually build the Widget.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited