PlatformViewLayer class Null safety
A layer that shows an embedded UIView on iOS.
- Inheritance
-
- Object
- AbstractNode
- Layer
- PlatformViewLayer
Constructors
- PlatformViewLayer({required Rect rect, required int viewId})
- Creates a platform view layer.
Properties
- alwaysNeedsAddToScene → bool
- Subclasses may override this to true to disable retained rendering.
- attached → bool
-
Whether this node is in a tree whose root is attached to something.
read-onlyinherited
- debugCreator ↔ Object?
-
The object responsible for creating this layer.
read / writeinherited
- debugDisposed → bool
-
If asserts are enabled, returns whether dispose has
been called since the last time any retained resources were created.
read-onlyinherited
- debugHandleCount → int
-
Returns the number of objects holding a LayerHandle to this layer.
read-onlyinherited
- debugSubtreeNeedsAddToScene → bool?
- Whether this or any descendant layer in the subtree needs addToScene.
- depth → int
-
The depth of this node in the tree.
read-onlyinherited
- engineLayer ↔ EngineLayer?
-
Stores the engine layer created for this layer in order to reuse engine
resources across frames for better app performance.
protected">@protectedprotected">@protectedvisibleForTesting">@visibleForTestingvisibleForTesting">@visibleForTestingread / writeinherited
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- nextSibling → Layer?
-
This layer's next sibling in the parent layer's child list.
read-onlyinherited
- owner → Object?
-
The owner for this node (null if unattached).
read-onlyinherited
- parent → ContainerLayer?
-
This layer's parent in the layer tree.
read-onlyinherited
- previousSibling → Layer?
-
This layer's previous sibling in the parent layer's child list.
read-onlyinherited
- rect → Rect
-
Bounding rectangle of this layer in the global coordinate space.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
- subtreeHasCompositionCallbacks → bool
-
Whether the subtree rooted at this layer has any composition callback
observers.
read-onlyinherited
- viewId → int
-
The unique identifier of the UIView displayed on this layer.
final
Methods
-
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
-
attach(
covariant Object owner) → void -
Mark this node as attached to the given owner.
mustCallSuper">@mustCallSuperinherited
-
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
-
debugMarkClean(
) → void -
Mark that this layer is in sync with engine.
visibleForTesting">@visibleForTestinginherited
-
describeClipBounds(
) → Rect? -
Describes the clip that would be applied to contents of this layer,
if any.
inherited
-
detach(
) → void -
Mark this node as detached.
mustCallSuper">@mustCallSuperinherited
-
dispose(
) → void - Clears any retained resources that this layer holds.
-
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 bylocalPosition
.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 bylocalPosition
.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 bylocalPosition
.protected">@protectedinherited -
markNeedsAddToScene(
) → void - Mark that this layer has changed and addToScene needs to be called.
-
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">@protectedinherited -
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">@mustCallSuperinherited
-
supportsRasterization(
) → bool -
Whether or not this layer, or any child layers, can be rasterized with
Scene.toImage or Scene.toImageSync.
override
-
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.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited