Started implementing a test of Area.RepaintAll()/Repaint().

redo/yz_icons_test.go

@@ -16,6 +16,8 @@ type icon struct {
 	Name	string
 }
 
+var firstimg *image.RGBA
+
 func readIcons() ([]icon, ImageList) {
 	out := make([]icon, len(icons))
 	outil := NewImageList()
@@ -27,6 +29,9 @@ func readIcons() ([]icon, ImageList) {
 		}
 		img := image.NewRGBA(png.Bounds())
 		draw.Draw(img, img.Rect, png, image.ZP, draw.Src)
+		if firstimg == nil {
+			firstimg = img
+		}
 		out[i].Icon = ImageIndex(i)
 		out[i].Name = icons[i].name
 		outil.Append(img)
@@ -34,6 +39,21 @@ func readIcons() ([]icon, ImageList) {
 	return out, outil
 }
 
+func tileImage(times int) *image.RGBA {
+	dx := firstimg.Rect.Dx()
+	dy := firstimg.Rect.Dy()
+	res := image.NewRGBA(image.Rect(0, 0, times * dx, times * dy))
+	r := image.Rect(0, 0, dx, dy)
+	for y := 0; y < times; y++ {
+		rr := r.Add(image.Pt(0, y * dy))
+		for x := 0; x < times; x++ {
+			draw.Draw(res, rr, firstimg, image.ZP, draw.Src)
+			rr = rr.Add(image.Pt(dx, 0))
+		}
+	}
+	return res
+}
+
 var icons = []struct {
 	data		[]byte
 	name	string

redo/yz_repaint_test.go

@@ -0,0 +1,46 @@
+// 21 august 2014
+
+package ui
+
+import (
+	"image"
+)
+
+type repainter struct {
+	img		*image.RGBA
+	area		Area
+	x		TextField
+	y		TextField
+	width	TextField
+	height	TextField
+	repaint	Button
+	all		Button
+	stack	Stack
+}
+
+func newRepainter(times int) *repainter {
+	r := new(repainter)
+	r.img = tileImage(times)
+	r.area = NewArea(r.img.Rect.Dx(), r.img.Rect.Dy(), r)
+	r.x = NewTextField()
+	r.y = NewTextField()
+	r.width = NewTextField()
+	r.height = NewTextField()
+	r.repaint = NewButton("Rect")
+	r.all = NewButton("All")
+	r.stack = NewHorizontalStack(r.x, r.y, r.width, r.height, r.repaint, r.all)
+	r.stack.SetStretchy(0)
+	r.stack.SetStretchy(1)
+	r.stack.SetStretchy(2)
+	r.stack.SetStretchy(3)
+	r.stack = NewVerticalStack(r.area, r.stack)
+	r.stack.SetStretchy(0)
+	return r
+}
+
+func  (r *repainter) Paint(rect image.Rectangle) *image.RGBA {
+	return r.img.SubImage(rect).(*image.RGBA)
+}
+
+func (r *repainter) Mouse(me MouseEvent) {}
+func (r *repainter) Key(ke KeyEvent) bool { return false }

redo/zz_test.go

@@ -34,6 +34,7 @@ var ddata = []dtype{
 type testwin struct {
 	t		Tab
 	w		Window
+	repainter	*repainter
 	fe		*ForeignEvent
 	festack	Stack
 	festart	Button
@@ -134,8 +135,10 @@ func (tw *testwin) make(done chan struct{}) {
 		done <- struct{}{}
 		return true
 	})
+	tw.icons, tw.il = readIcons()		// repainter uses these
+	tw.repainter = newRepainter(15)
+	tw.t.Append("Repaint", tw.repainter.stack)
 	tw.addfe()
-	tw.icons, tw.il = readIcons()
 	tw.icontbl = NewTable(reflect.TypeOf(icon{}))
 	tw.icontbl.Lock()
 	idq := tw.icontbl.Data().(*[]icon)