CustomPainterSemantics class Null safety

Contains properties describing information drawn in a rectangle contained by the Canvas used by a CustomPaint.

This information is used, for example, by assistive technologies to improve the accessibility of applications.

Implement CustomPainter.semanticsBuilder to build the semantic description of the whole picture drawn by a CustomPaint, rather that one particular rectangle.

Constructors

CustomPainterSemantics({Key? key, required Rect rect, required SemanticsProperties properties, Matrix4? transform, Set<SemanticsTag>? tags}): Creates semantics information describing a rectangle on a canvas. [...]
const

hashCode → int: The hash code for this object. [...]
read-only, inherited
key → Key?: Identifies this object in a list of siblings. [...]
final
properties → SemanticsProperties: Contains properties that are assigned to the SemanticsNode created or updated from this object. [...]
final
rect → Rect: The location and size of the box on the canvas where this piece of semantic information applies. [...]
final
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited
tags → Set<SemanticsTag>?: Tags used by the parent SemanticsNode to determine the layout of the semantics tree. [...]
final
transform → Matrix4?: The transform from the canvas' coordinate system to its parent's coordinate system. [...]
final

noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed. [...]
inherited
toString() → String: A string representation of this object. [...]
inherited