BoxPainter class abstract

A stateful class that can paint a particular Decoration.

BoxPainter objects can cache resources so that they can be used multiple times.

Some resources used by BoxPainter may load asynchronously. When this happens, the onChanged callback will be invoked. To stop this callback from being called after the painter has been discarded, call dispose.


BoxPainter([VoidCallback? onChanged])
Abstract const constructor. This constructor enables subclasses to provide const constructors so that they can be used in const expressions.


hashCode int
The hash code for this object.
no setterinherited
onChanged VoidCallback?
Callback that is invoked if an asynchronously-loading resource used by the decoration finishes loading. For example, an image. When this is invoked, the paint method should be called again.
runtimeType Type
A representation of the runtime type of the object.
no setterinherited


dispose() → void
Discard any resources being held by the object.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
paint(Canvas canvas, Offset offset, ImageConfiguration configuration) → void
Paints the Decoration for which this object was created on the given canvas using the given configuration.
toString() String
A string representation of this object.


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