Un-kludged Decorator::GetFootprint. Much more elegant now. :)

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4732 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/server/Decorator.cpp

@@ -541,17 +541,12 @@ void Decorator::_SetColors(void)
 
 /*!
 	\brief Returns the "footprint" of the entire window, including decorator
-	\return Region representing the window's screen footprint
-	
-	This function should generate a new BRegion allocated on the heap which represents
-	the entire area occupied by the window decorator on the screen. For example, a BeOS
-	decorator would return _tabrect + _borderrect.
+	\param region Region to be changed to represent the window's screen footprint
 	
 	This function is required by all subclasses.
 */
-BRegion *Decorator::GetFootprint(void)
+void Decorator::GetFootprint(BRegion *region)
 {
-	return NULL;
 }
 
 /*!

src/servers/app/server/DefaultDecorator.cpp

@@ -293,16 +293,17 @@ STRACE(("DefaultDecorator: Move By (%.1f, %.1f)\n",pt.x,pt.y));
 	bottomborder.OffsetBy(pt);
 }
 
-BRegion * DefaultDecorator::GetFootprint(void)
+void DefaultDecorator::GetFootprint(BRegion *region)
 {
 STRACE(("DefaultDecorator: Get Footprint\n"));
 	// This function calculates the decorator's footprint in coordinates
 	// relative to the layer. This is most often used to set a WinBorder
 	// object's visible region.
+	if(!region)
+		return;
 	
-	BRegion *reg=new BRegion(_borderrect);
-	reg->Include(_tabrect);
-	return reg;
+	region->Set(_borderrect);
+	region->Include(_tabrect);
 }
 
 BRect DefaultDecorator::SlideTab(float dx, float dy=0){

src/servers/app/server/DefaultDecorator.h

@@ -40,7 +40,7 @@ public:
 	virtual void MoveBy(BPoint pt);
 	virtual void Draw(BRect r);
 	virtual void Draw(void);
-	virtual BRegion *GetFootprint(void);
+	virtual void GetFootprint(BRegion *region);
 	virtual BRect SlideTab(float dx, float dy);
 	virtual click_type Clicked(BPoint pt, int32 buttons, int32 modifiers);
 protected:

src/servers/app/server/DesktopClasses.cpp

@@ -436,10 +436,14 @@ WinBorder* Screen::GetWindowAt( BPoint pt ){
 	{
 		if(child->_hidden)
 			continue;
-		wb		= dynamic_cast<WinBorder*>( child );
-		if (wb)
-			if(wb->GetDecorator()->GetFootprint()->Contains(pt))
+		wb = dynamic_cast<WinBorder*>(child);
+		if(wb)
+		{
+			BRegion reg;
+			wb->GetDecorator()->GetFootprint(&reg);
+			if(reg.Contains(pt))
 				return wb;
+		}
 	}
 	return NULL;
 }

src/servers/app/server/WinBorder.cpp

@@ -110,13 +110,8 @@ WinBorder::WinBorder(const BRect &r, const char *name, const int32 look, const i
 	_vresizewin	= false;
 	_driver		= GetGfxDriver(ActiveScreen());
 	_decorator	= new_decorator(r,name,look,feel,flags,GetGfxDriver(ActiveScreen()));
+	_decorator->GetFootprint(_visible);
 
-	// We need to do this because GetFootprint is supposed to generate a new BRegion.
-	// I suppose the call probably ought to be void GetFootprint(BRegion *recipient), but we can
-	// change that later.
-
-	delete _visible; // it was initialized in Layer's constructor.
-	_visible	= _decorator->GetFootprint();
 	*_full		= *_visible;
 	*_invalid	= *_visible;
 	_frame		= _visible->Frame();
@@ -314,21 +309,22 @@ STRACE_CLICK(("ClickMove: Drag\n"));
 			// by the new location so we know what areas to invalidate.
 			
 			// The original location
-			BRegion *reg=_decorator->GetFootprint();
+			BRegion reg;
+			_decorator->GetFootprint(&reg);
 			
 			// The new location
-			BRegion reg2(*reg);
+			BRegion reg2(reg);
 			reg2.OffsetBy((int32)dx, (int32)dy);
 
 			MoveBy(dx,dy);
 			_decorator->MoveBy(BPoint(dx, dy));
 
 			// 3) quickly move the window
-			_driver->CopyRegion(reg,reg2.Frame().LeftTop());
+			_driver->CopyRegion(&reg,reg2.Frame().LeftTop());
 
 			// 4) Invalidate only the areas which we can't redraw directly
 			for(int32 i=0; i<reg2.CountRects();i++)
-				reg->Exclude(reg2.RectAt(i));
+				reg.Exclude(reg2.RectAt(i));
 			
 			// TODO: DW's notes to self
 			// As of right now, dragging the window is extremely slow despite the use
@@ -344,12 +340,11 @@ STRACE_CLICK(("ClickMove: Drag\n"));
 			//  layer's coordinates, etc) and set things right. Secondly, nuke the invalid region
 			// in this call so that when RequestDraw is called, this WinBorder doesn't redraw itself
 			
-			_parent->Invalidate(*reg);
+			_parent->Invalidate(reg);
 			
 			_parent->RebuildRegions();
 			_parent->RequestDraw();
 			
-			delete reg;
 			unlock_layers();
 		}
 	}