WaterMarkPainter class abstract
定义水印画笔
- Implementers
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
paintUnit(
Canvas canvas, double devicePixelRatio) → Size -
绘制"单元水印",完整的水印是由单元水印重复平铺组成,返回值为"单元水印"占用空间的大小。
devicePixelRatio
: 因为最终要将绘制内容保存为图片,所以在绘制时需要根据屏幕的 DPR来放大,以防止失真 -
shouldRepaint(
covariant WaterMarkPainter oldPainter) → bool - 是否需要重绘
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited