ShapePainter class abstract
Base class for all shape painters in the package.
This abstract class provides common functionality and enforces the contract that all shape painters must implement.
- Inheritance
-
- Object
- Listenable
- CustomPainter
- ShapePainter
- Implementers
Constructors
- ShapePainter()
-
Creates a shape painter with the given parameters.
const
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- semanticsBuilder → SemanticsBuilderCallback?
-
Returns a function that builds semantic information for the picture drawn
by this painter.
no setterinherited
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be notified when it is time to repaint.
inherited
-
hitTest(
Offset position) → bool? -
Called whenever a hit test is being performed on an object that is using
this custom paint delegate.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
paint(
Canvas canvas, Size size) → void -
Paints the shape on the given canvas.
override
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that the
object notifies when it is time to repaint.
inherited
-
shouldRebuildSemantics(
covariant CustomPainter oldDelegate) → bool -
Whether the painter should repaint when the painter instance changes.
override
-
shouldRepaint(
covariant CustomPainter oldDelegate) → bool -
Whether the painter should repaint when the size changes.
override
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited