RenderIndexedSemantics class

A render objects that annotates semantics with an index.

Certain widgets will automatically provide a child index for building semantics. For example, the ScrollView uses the index of the first visible child semantics node to determine the SemanticsConfiguration.scrollIndex.

Constructors

RenderIndexedSemantics({RenderBox? child, required int index}): Creates a render object that annotates the child semantics with an index.

Properties

alwaysNeedsCompositing → bool: Whether this render object always needs compositing.
no setterinherited
attached → bool: Whether the render tree this render object belongs to is attached to a PipelineOwner.
no setterinherited
child ↔ RenderBox?: The render object's unique child.
getter/setter pairinherited
constraints → BoxConstraints: The box constraints most recently received from the parent.
no setterinherited
debugCanParentUseSize → bool: Whether the parent render object is permitted to use this render object's size.
no setterinherited
debugCreator ↔ Object?: The object responsible for creating this render object.
getter/setter pairinherited
debugDisposed → bool?: Whether this has been disposed.
no setterinherited
debugDoingThisLayout → bool: Whether performLayout for this render object is currently running.
no setterinherited
debugDoingThisLayoutWithCallback → bool: Whether invokeLayoutCallback for this render object is currently running.
no setterinherited
debugDoingThisPaint → bool: Whether paint for this render object is currently running.
no setterinherited
debugDoingThisResize → bool: Whether performResize for this render object is currently running.
no setterinherited
debugLayer → ContainerLayer?: In debug mode, the compositing layer that this render object uses to repaint.
no setterinherited
debugLayoutParent → RenderObject?: The RenderObject that's expected to call layout on this RenderObject in its performLayout implementation.
no setterinherited
debugNeedsCompositedLayerUpdate → bool: Whether this render object's layer information is dirty.
no setterinherited
debugNeedsLayout → bool: Whether this render object's layout information is dirty.
no setterinherited
debugNeedsPaint → bool: Whether this render object's paint information is dirty.
no setterinherited
debugNeedsSemanticsUpdate → bool: Whether the semantics of this render object is dirty and await the update.
no setterinherited
debugSemantics → SemanticsNode?: The semantics of this render object.
no setterinherited
depth → int: The depth of this render object in the render tree.
no setterinherited
hashCode → int: The hash code for this object.
no setterinherited
hasSize → bool: Whether this render object has undergone layout and has a size.
no setterinherited
index ↔ int: The index used to annotated child semantics.
getter/setter pair
isRepaintBoundary → bool: Whether this render object repaints separately from its parent.
no setterinherited
layer ↔ ContainerLayer?: The compositing layer that this render object uses to repaint.
getter/setter pairinherited
needsCompositing → bool: Whether we or one of our descendants has a compositing layer.
no setterinherited
owner → PipelineOwner?: The owner for this render object (null if unattached).
no setterinherited
paintBounds → Rect: Returns a rectangle that contains all the pixels painted by this box.
no setterinherited
parent → RenderObject?: The parent of this render object in the render tree.
no setterinherited
parentData ↔ ParentData?: Data for use by the parent render object.
getter/setter pairinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
semanticBounds → Rect: The bounding box, in the local coordinate system, of this object, for accessibility purposes.
no setterinherited
size ↔ Size: The size of this render box computed during layout.
getter/setter pairinherited
sizedByParent → bool: Whether the constraints are the only input to the sizing algorithm (in particular, child nodes have no impact).
no setterinherited

Methods

adoptChild(RenderObject child) → void: Called by subclasses when they decide a render object is a child.
inherited
applyPaintTransform(covariant RenderObject child, Matrix4 transform) → void: Multiply the transform from the parent's coordinate system to this box's coordinate system into the given transform.
inherited
assembleSemanticsNode(SemanticsNode node, SemanticsConfiguration config, Iterable<SemanticsNode> children) → void: Assemble the SemanticsNode for this RenderObject.
inherited
attach(PipelineOwner owner) → void: Mark this render object as attached to the given owner.
inherited
clearSemantics() → void: Removes all semantics from this render object and its descendants.
inherited
computeDistanceToActualBaseline(TextBaseline baseline) → double?: Returns the distance from the y-coordinate of the position of the box to the y-coordinate of the first given baseline in the box's contents, if any, or null otherwise.
inherited
computeDryBaseline(covariant BoxConstraints constraints, TextBaseline baseline) → double?: Computes the value returned by getDryBaseline.
inherited
computeDryLayout(covariant BoxConstraints constraints) → Size: Computes the value returned by getDryLayout. Do not call this function directly, instead, call getDryLayout.
inherited
computeMaxIntrinsicHeight(double width) → double: Computes the value returned by getMaxIntrinsicHeight. Do not call this function directly, instead, call getMaxIntrinsicHeight.
inherited
computeMaxIntrinsicWidth(double height) → double: Computes the value returned by getMaxIntrinsicWidth. Do not call this function directly, instead, call getMaxIntrinsicWidth.
inherited
computeMinIntrinsicHeight(double width) → double: Computes the value returned by getMinIntrinsicHeight. Do not call this function directly, instead, call getMinIntrinsicHeight.
inherited
computeMinIntrinsicWidth(double height) → double: Computes the value returned by getMinIntrinsicWidth. Do not call this function directly, instead, call