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35 行
961 B

using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.flow {
public class ClipRectLayer : ContainerLayer {
Rect _clipRect;
public Rect clipRect {
set { this._clipRect = value; }
}
public override void preroll(PrerollContext context, Matrix3 matrix) {
var childPaintBounds = Rect.zero;
this.prerollChildren(context, matrix, ref childPaintBounds);
childPaintBounds = childPaintBounds.intersect(this._clipRect);
if (!childPaintBounds.isEmpty) {
this.paintBounds = childPaintBounds;
}
}
public override void paint(PaintContext context) {
var canvas = context.canvas;
canvas.save();
canvas.clipRect(this.paintBounds);
try {
this.paintChildren(context);
}
finally {
canvas.restore();
}
}
}
}