From 3c0e5f8e8b8244669653817fa433394d1f6d48ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20A=C3=9Fmus?= <superstippi@gmx.de>
Date: Tue, 20 Dec 2005 22:31:42 +0000
Subject: [PATCH] added marking a ViewLayer dirty (ie if background needs to be
 cleared yet)

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15626 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/servers/app/ViewLayer.cpp | 14 +++++++++++++-
 src/servers/app/ViewLayer.h   |  5 +++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/servers/app/ViewLayer.cpp b/src/servers/app/ViewLayer.cpp
index 2b21ac47b1..98c4e7a3cf 100644
--- a/src/servers/app/ViewLayer.cpp
+++ b/src/servers/app/ViewLayer.cpp
@@ -44,6 +44,7 @@ ViewLayer::ViewLayer(BRect frame, const char* name,
 	// ViewLayers start visible by default
 	fHidden(false),
 	fVisible(true),
+	fBackgroundDirty(true),
 
 	fEventMask(0),
 	fEventOptions(0),
@@ -845,11 +846,13 @@ ViewLayer::Draw(DrawingEngine* drawingEngine, BRegion* effectiveClipping,
 		drawingEngine->FillRegion(redraw, fViewColor);
 	}
 
+	fBackgroundDirty = false;
+
 	// let children draw
 	if (deep) {
 		// before passing the clipping on to children, exclude our
 		// own region from the available clipping
-		effectiveClipping->Exclude(&ScreenClipping(windowContentClipping));
+		effectiveClipping->Exclude(&fScreenClipping);
 
 		for (ViewLayer* child = FirstChild(); child; child = child->NextSibling()) {
 			child->Draw(drawingEngine, effectiveClipping,
@@ -907,6 +910,15 @@ ViewLayer::UpdateVisibleDeep(bool parentVisible)
 		child->UpdateVisibleDeep(fVisible);
 }
 
+// MarkBackgroundDirty
+void
+ViewLayer::MarkBackgroundDirty()
+{
+	fBackgroundDirty = true;
+	for (ViewLayer* child = FirstChild(); child; child = child->NextSibling())
+		child->MarkBackgroundDirty();
+}
+
 // PrintToStream
 void
 ViewLayer::PrintToStream() const
diff --git a/src/servers/app/ViewLayer.h b/src/servers/app/ViewLayer.h
index 49c790f313..2a9e788caf 100644
--- a/src/servers/app/ViewLayer.h
+++ b/src/servers/app/ViewLayer.h
@@ -160,6 +160,10 @@ class ViewLayer {
 			// according to the parents visibility
 			void			UpdateVisibleDeep(bool parentVisible);
 
+			void			MarkBackgroundDirty();
+			bool			IsBackgroundDirty() const
+								{ return fBackgroundDirty; }
+
 			// clipping
 			void			RebuildClipping(bool deep);
 			BRegion&		ScreenClipping(BRegion* windowContentClipping,
@@ -189,6 +193,7 @@ class ViewLayer {
 			uint32			fFlags;
 			bool			fHidden;
 			bool			fVisible;
+			bool			fBackgroundDirty;
 
 			uint32			fEventMask;
 			uint32			fEventOptions;