fixed the clipping bug I was talking in my previous checkin.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12898 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/servers/app/newClipping/Layer.cpp

@@ -501,6 +501,7 @@ void Layer::rebuild_visible_regions(const BRegion &invalid,
 	// intersect maximum wanted region with the invalid region
 	BRegion common;
 	set_user_regions(common);
+
 	common.IntersectWith(&invalid);
 	// if the resulted region is not valid, this layer is not in the catchment area
 	// of the region being invalidated
@@ -514,6 +515,11 @@ void Layer::rebuild_visible_regions(const BRegion &invalid,
 	{
 		// we have something to include to our fullVisible. It may already be in
 		// there, but we'll never know.
+
+// TODO: further analyze the next 2 lines.
+		fFullVisible.Exclude(&invalid);
+		fVisible.Exclude(&invalid);
+
 		fFullVisible.Include(&common);
 	}
 	else
@@ -585,6 +591,8 @@ void Layer::clear_visible_regions()
 void Layer::PrintToStream() const
 {
 	printf("-> %s\n", fName);
+	fVisible.PrintToStream();
+	fFullVisible.PrintToStream();
 	for (Layer *child = VirtualBottomChild(); child;
 				child = VirtualUpperSibling())
 		child->PrintToStream();

src/tests/servers/app/newClipping/main.cpp

@@ -118,7 +118,7 @@ void clsMainWindow::test1()
 	c.red = rand()/256;
 	c.green = rand()/256;
 	c.blue = rand()/256;
-	Layer	*lay12 = new Layer(BRect(170,20,290,150), "lay21",
+	Layer	*lay12 = new Layer(BRect(170,20,290,150), "lay12",
 			B_FOLLOW_NONE,
 			B_FULL_UPDATE_ON_RESIZE, c);
 	lay1->AddLayer(lay12);
@@ -126,7 +126,7 @@ void clsMainWindow::test1()
 	c.red = rand()/256;
 	c.green = rand()/256;
 	c.blue = rand()/256;
-	Layer	*lay13 = new Layer(BRect(20,20,100,100), "lay31",
+	Layer	*lay13 = new Layer(BRect(20,20,100,100), "lay13",
 			B_FOLLOW_LEFT | B_FOLLOW_BOTTOM,
 			0, c);
 	lay12->AddLayer(lay13);