ContainerLayer class

A composited layer that has a list of children.

A ContainerLayer instance merely takes a list of children and inserts them into the composited rendering in order. There are subclasses of ContainerLayer which apply more elaborate effects in the process.

Inheritance
Implementers

Constructors

ContainerLayer()

Properties

firstChild Layer
The first composited layer in this layer's child list.
read-only
lastChild Layer
The last composited layer in this layer's child list.
read-only
alwaysNeedsAddToScene bool
Subclasses may override this to true to disable retained rendering.
@protected, read-only, inherited
attached bool
Whether this node is in a tree whose root is attached to something. [...]
read-only, inherited
debugCreator ↔ dynamic
The object responsible for creating this layer. [...]
read / write, inherited
debugSubtreeNeedsAddToScene bool
Whether any layer in the subtree needs addToScene. [...]
@visibleForTesting, read-only, inherited
depth int
The depth of this node in the tree. [...]
read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
nextSibling Layer
This layer's next sibling in the parent layer's child list.
read-only, inherited
owner Object
The owner for this node (null if unattached). [...]
read-only, inherited
parent ContainerLayer
This layer's parent in the layer tree. [...]
read-only, inherited
previousSibling Layer
This layer's previous sibling in the parent layer's child list.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

addChildrenToScene(SceneBuilder builder, [ Offset childOffset = Offset.zero ]) → void
Uploads all of this layer's children to the engine. [...]
addToScene(SceneBuilder builder, [ Offset layerOffset = Offset.zero ]) EngineLayer
Override this method to upload this layer to the engine. [...]
override
append(Layer child) → void
Adds the given layer to the end of this layer's child list.
applyTransform(Layer child, Matrix4 transform) → void
Applies the transform that would be applied when compositing the given child to the given matrix. [...]
attach(covariant Object owner) → void
Mark this node as attached to the given owner. [...]
override
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
override
depthFirstIterateChildren() List<Layer>
Returns the descendants of this layer in depth first order.
@visibleForTesting
detach() → void
Mark this node as detached. [...]
override
find<S>(Offset regionOffset) → S
Returns the value of S that corresponds to the point described by regionOffset. [...]
override
removeAllChildren() → void
Removes all of this layer's children from its child list.
updateSubtreeNeedsAddToScene() → void
Traverse the layer tree and compute if any subtree needs addToScene. [...]
override
adoptChild(covariant AbstractNode child) → void
Mark the given node as being a child of this node. [...]
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
debugMarkClean() → void
Mark that this layer is in sync with engine. [...]
@visibleForTesting, inherited
dropChild(covariant AbstractNode child) → void
Disconnect the given node from this node. [...]
inherited
markNeedsAddToScene() → void
Mark that this layer has changed and addToScene needs to be called.
@protected, @visibleForTesting, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
redepthChild(AbstractNode child) → void
Adjust the depth of the given child to be greater than this node's own depth. [...]
@protected, inherited
redepthChildren() → void
Adjust the depth of this node's children, if any. [...]
inherited
remove() → void
Removes this layer from its parent layer's child list. [...]
@mustCallSuper, inherited
replaceWith(Layer newLayer) → void
Replaces this layer with the given layer in the parent layer's child list.
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.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 brief description of this object, usually just the runtimeType and the hashCode. [...]
inherited

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited