Replace references to Canvas.Clip

box.go

@@ -358,7 +358,7 @@ func (this *box) drawBorders (can canvas.Canvas) {
 	rectangle := func (x0, y0, x1, y1 int, c color.Color) {
 		area := image.Rect(x0, y0, x1, y1)
 		if transparent(c) && this.parent != nil {
-			this.parent.drawBackgroundPart(can.Clip(area))
+			this.parent.drawBackgroundPart(can.SubCanvas(area))
 		}
 		pen.Fill(c)
 		pen.Rectangle(area)
@@ -426,7 +426,7 @@ func (this *box) doDraw () {
 	if this.canvas == nil { return }
 	if this.drawer != nil {
 		this.drawBorders(this.canvas)
-		this.drawer.Draw(this.canvas.Clip(this.innerClippingBounds))
+		this.drawer.Draw(this.canvas.SubCanvas(this.innerClippingBounds))
 	}
 }
 
@@ -439,7 +439,7 @@ func (this *box) doLayout () {
 	if this.parent == nil { this.canvas = nil; return  }
 	parentCanvas := this.parent.canvas()
 	if parentCanvas == nil { this.canvas = nil; return }
-	this.canvas = parentCanvas.Clip(this.bounds)
+	this.canvas = parentCanvas.SubCanvas(this.bounds)
 }
 
 func (this *box) setParent (parent parent) {

canvasbox.go

@@ -31,5 +31,5 @@ func (this *canvasBox) Invalidate () {
 func (this *canvasBox) Draw (can canvas.Canvas) {
 	this.box.Draw(can)
 	this.userDrawer.Draw (
-		can.Clip(this.padding.Apply(this.innerClippingBounds)))
+		can.SubCanvas(this.padding.Apply(this.innerClippingBounds)))
 }

containerbox.go

@@ -167,7 +167,7 @@ func (this *containerBox) Draw (can canvas.Canvas) {
 		rocks[index] = box.Bounds()
 	}
 	for _, tile := range canvas.Shatter(this.bounds, rocks...) {
-		clipped := can.Clip(tile)
+		clipped := can.SubCanvas(tile)
 		if this.transparent() && this.parent != nil {
 			this.parent.drawBackgroundPart(clipped)
 		}