PositionedBoxLayoutDelegate class

A SceneElementLayoutDelegate which lays out the SceneElement at a specified position in the Scene and with a specified size.

The meaning of position can be changed through alignment. Per default position is the Offset to the top-left corner of the bounds of the SceneElement. By settings alignment to Alignment.center, for example, position will be the Offset to the center of element.

Inheritance
Mixed in types

Constructors

PositionedBoxLayoutDelegate({Offset position = Offset.zero, AlignmentGeometry alignment = Alignment.topLeft, required Size size})
Creates a SceneElementLayoutDelegate which lays out the SceneElement at a specified position in the Scene and with a specified size.

Properties

alignment ↔ AlignmentGeometry
The alignment of position within size.
getter/setter pair
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
position ↔ Offset
The position of the SceneElement as an Offset from the origin of the Scene coordinates system.
getter/setter pairinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
size ↔ Size
The Size of the SceneElement in the Scene coordinate system.
getter/setter pairinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
buildContent(BuildContext context) → Widget?
Optionally builds the Widget whose size determines the size of the SceneElement.
inherited
buildPositioned(BuildContext context, Widget content) → Widget
Builds the Widget which positions the SceneElement in the Scene's Stack.
override
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
override
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
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
toStringShort() → String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited