ClipPathLayer class Null safety

A composite layer that clips its children using a path.

When debugging, setting debugDisableClipLayers to true will cause this layer to be skipped (directly replaced by its children). This can be helpful to track down the cause of performance problems.

Inheritance

Constructors

ClipPathLayer({Path? clipPath, Clip clipBehavior = Clip.antiAlias})
Creates a layer with a path-based clip.

Properties

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
clipBehavior ↔ Clip
Controls how to clip.
read / write
clipPath ↔ Path?
The path to clip in the parent's coordinate system.
read / write
debugCreator ↔ Object?
The object responsible for creating this layer.
read / write, inherited
debugDisposed → bool
If asserts are enabled, returns whether dispose has been called since the last time any retained resources were created.
read-only, inherited
debugHandleCount → int
Returns the number of objects holding a LayerHandle to this layer.
read-only, inherited
debugSubtreeNeedsAddToScene → bool?
Whether this or any descendant layer in the subtree needs addToScene.
@visibleForTesting, read-only, inherited
depth → int
The depth of this node in the tree.
read-only, inherited
engineLayer ↔ EngineLayer?
Stores the engine layer created for this layer in order to reuse engine resources across frames for better app performance.
@protected, @protected, @visibleForTesting, @visibleForTesting, read / write, inherited
firstChild → Layer?
The first composited layer in this layer's child list.
read-only, inherited
hasChildren → bool
Returns whether this layer has at least one child layer.
read-only, inherited
hashCode → int
The hash code for this object.
read-only, inherited
lastChild → Layer?
The last composited layer in this layer's child list.
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
subtreeHasCompositionCallbacks → bool
Whether the subtree rooted at this layer has any composition callback observers.
read-only, inherited

Methods

addChildrenToScene(SceneBuilder builder) → void
Uploads all of this layer's children to the engine.
inherited
addCompositionCallback(CompositionCallback callback) → VoidCallback
Adds a callback for when the layer tree that this layer is part of gets composited, or when it is detached and will not be rendered again.
inherited
addToScene(SceneBuilder builder) → void
Override this method to upload this layer to the engine.
override
adoptChild(covariant Layer child) → void
Mark the given node as being a child of this node.
inherited
append(Layer child) → void
Adds the given layer to the end of this layer's child list.
inherited
applyTransform(Layer? child, Matrix4 transform) → void
Applies the transform that would be applied when compositing the given child to the given matrix.
inherited
attach(covariant Object owner) → void
Mark this node as attached to the given owner.
inherited
buildScene(SceneBuilder builder) → Scene
Consider this layer as the root and build a scene (a tree of layers) in the engine.
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.
override
debugMarkClean() → void
Mark that this layer is in sync with engine.
@visibleForTesting, inherited
depthFirstIterateChildren() → List<Layer>
Returns the descendants of this layer in depth first order.
@visibleForTesting, inherited
describeClipBounds() → Rect?
Describes the clip that would be applied to contents of this layer, if any.
override
detach() → void
Mark this node as detached.
inherited
dispose() → void
Clears any retained resources that this layer holds.
inherited
dropChild(covariant Layer child) → void
Disconnect the given node from this node.
inherited
find<S extends Object>(Offset localPosition) → S?
Search this layer and its subtree for the first annotation of type S under the point described by localPosition.
inherited
findAllAnnotations<S extends Object>(Offset localPosition) → AnnotationResult<S>
Search this layer and its subtree for all annotations of type S under the point described by localPosition.
inherited
findAnnotations<S extends Object>(AnnotationResult<S> result, Offset localPosition, {required bool onlyFirst}) → bool
Search this layer and its subtree for annotations of type S at the location described by localPosition.
override
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
removeAllChildren() → void
Removes all of this layer's children from its 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.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 brief description of this object, usually just the runtimeType and the hashCode.
inherited
updateSubtreeNeedsAddToScene() → void
Traverses the layer subtree starting from this layer and determines whether it needs addToScene.
inherited

Operators

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