* the decorator knows best which region to update when changing the title, so

it must now fill the updateRegion parameter of SetTitle().
* WinBorder::SetName() is now greatly simplified and achieves better results
  due to that.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14923 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/servers/app/Decorator.h

@@ -57,13 +57,13 @@ class Decorator {
 			void				SetFeel(int32 wfeel);
 			void				SetFont(ServerFont *font);
 			void				SetLook(int32 wlook);
-			
-			void				SetClose(bool is_down);
-			void				SetMinimize(bool is_down);
-			void				SetZoom(bool is_down);
 
-	virtual	void				SetTitle(const char *string);
-		
+			void				SetClose(bool pressed);
+			void				SetMinimize(bool pressed);
+			void				SetZoom(bool pressed);
+
+	virtual	void				SetTitle(const char* string, BRegion* updateRegion = NULL);
+
 			int32				GetLook() const;
 			int32				GetFeel() const;
 			int32				GetFlags() const;

src/servers/app/Decorator.cpp

@@ -190,18 +190,20 @@ Decorator::SetZoom(bool is_down)
 	}
 }
 
+
 /*!
 	\brief Updates the value of the decorator title
 	\param string New title value
 */
 void
-Decorator::SetTitle(const char *string)
+Decorator::SetTitle(const char* string, BRegion* updateRegion)
 {
 	fTitle.SetTo(string);
 	_DoLayout();
 	// TODO: redraw?
 }
 
+
 /*!
 	\brief Returns the decorator's window look
 	\return the decorator's window look

src/servers/app/DefaultDecorator.cpp

@@ -72,18 +72,44 @@ DefaultDecorator::DefaultDecorator(DesktopSettings& settings, BRect rect,
 		rect.left, rect.top, rect.right, rect.bottom));
 }
 
-DefaultDecorator::~DefaultDecorator(void)
+
+DefaultDecorator::~DefaultDecorator()
 {
 	STRACE(("DefaultDecorator: ~DefaultDecorator()\n"));
 	delete [] fFrameColors;
 }
 
+
+void
+DefaultDecorator::SetTitle(const char* string, BRegion* updateRegion)
+{
+	BRect rect = GetTabRect();
+
+	Decorator::SetTitle(string);
+	
+	if (updateRegion == NULL)
+		return;
+
+	BRect updatedRect = GetTabRect();
+	if (rect.left > updatedRect.left)
+		rect.left = updatedRect.left;
+	if (rect.right < updatedRect.right)
+		rect.right = updatedRect.right;
+
+	rect.bottom++;
+		// the border will look differently when the title is adjacent
+
+	updateRegion->Set(rect);
+}
+
+
 void
 DefaultDecorator::MoveBy(float x, float y)
 {
 	MoveBy(BPoint(x,y));
 }
 
+
 void
 DefaultDecorator::MoveBy(BPoint pt)
 {

src/servers/app/DefaultDecorator.h

@@ -22,6 +22,8 @@ public:
 								int32 look, int32 feel, int32 flags);
 	virtual					~DefaultDecorator();
 
+	virtual	void			SetTitle(const char* string, BRegion* updateRegion = NULL);
+
 	virtual	void			MoveBy(float x, float y);
 	virtual	void			MoveBy(BPoint pt);
 	virtual	void			ResizeBy(float x, float y);

src/servers/app/WinBorder.cpp

@@ -289,20 +289,14 @@ WinBorder::SetName(const char* name)
 	// and redraw it.
 
 	if (fDecorator) {
-		// before the change
-		BRegion invalid(fDecorator->GetTabRect());
+		BRegion updateRegion;
+		fDecorator->SetTitle(name, &updateRegion);
 
-		fDecorator->SetTitle(name);
-
-		// after the change
-		invalid.Include(fDecorator->GetTabRect());
-
-		// TODO: still doesn't look good (visually), but at least it works
 		fRebuildDecRegion = true;
-		GetRootLayer()->MarkForRebuild(invalid);
+		GetRootLayer()->MarkForRebuild(updateRegion);
 		GetRootLayer()->TriggerRebuild();
 
-		GetRootLayer()->MarkForRedraw(invalid);
+		GetRootLayer()->MarkForRedraw(updateRegion);
 		GetRootLayer()->TriggerRedraw();
 	}
 }
@@ -443,7 +437,7 @@ WinBorder::MouseDown(const BMessage *msg)
 				action = DEC_DRAG;
 
 			// set decorator internals
-			switch(action) {
+			switch (action) {
 				case DEC_CLOSE:
 					fIsClosing = true;
 					fDecorator->SetClose(true);