Changed the interaction between BMenuFrame, BMenuScroller and

BMenuWindow. BMenuScroller now is just the scroller button, and it's a 
child of BMenuWindow. This simplifies attaching/detaching the 
scrollers, and it's also a bit cleaner. 
The lower scroller wasn't shown anymore for some reason, and this commit also fixes this problem.
A drawing bug shows up now, though: when scrolling the menu UP, some 
spurious lines are drawn over the menu. I wonder if this is an 
app_server bug or what.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21326 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/interface/MenuWindow.h

@@ -35,8 +35,15 @@ class BMenuWindow : public BWindow {
 		bool CheckForScrolling(BPoint cursor);
 
 	private:
-		BMenuScroller *fScroller;
+		BMenu *fMenu;
 		BMenuFrame *fMenuFrame;
+		BMenuScroller *fUpperScroller;
+		BMenuScroller *fLowerScroller;
+		
+		float fValue;
+		float fLimit;
+		
+		bool _Scroll(BPoint cursor);
 };
 
 }	// namespace BPrivate