Implemented redrawing the desktop after color changes. Right now, it only works

correctly when Tracker is not running; obviously, the background is cleared in
Tracker before it had the chance of changing the view color.
Maybe the app_server needs to detect the background view of the desktop and
change the view color manually :-/


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16376 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/Desktop.cpp

@@ -590,6 +590,31 @@ Desktop::SetCursor(ServerCursor* newCursor)
 }
 
 
+/*!
+	\brief Redraws the background (ie. the desktop window, if any).
+*/
+void
+Desktop::RedrawBackground()
+{
+	LockAllWindows();
+
+	BRegion redraw;
+
+	WindowLayer* window = _CurrentWindows().FirstWindow();
+	if (window->Feel() == kDesktopWindowFeel) {
+		// TODO: this doesn't work correctly, yet
+		redraw = window->VisibleContentRegion();
+		window->ProcessDirtyRegion(redraw);
+	} else {
+		redraw = BackgroundRegion();
+		fBackgroundRegion.MakeEmpty();
+		_SetBackground(redraw);
+	}
+
+	UnlockAllWindows();
+}
+
+
 void
 Desktop::UpdateWorkspaces()
 {

src/servers/app/Desktop.h

@@ -158,6 +158,8 @@ class Desktop : public MessageLooper, public ScreenOwner {
 		BRegion&				BackgroundRegion()
 									{ return fBackgroundRegion; }
 
+		void					RedrawBackground();
+
 		void					MinimizeApplication(team_id team);
 		void					BringApplicationToFront(team_id team);
 

src/servers/app/Workspace.cpp

@@ -98,9 +98,12 @@ Workspace::Color() const
 void
 Workspace::SetColor(const RGBColor& color, bool makeDefault)
 {
+	if (color == Color())
+		return;
+
 	// TODO: support makeDefault
-	// TODO: redraw desktop!
 	fWorkspace.SetColor(color);
+	fDesktop.RedrawBackground();
 }