if (topTabIndex > 0) { int scrollWidth = arrowBar.getSize().x; area.width -=  scrollWidth; }
private boolean scroll_rightVisible() {		if (topTabIndex < items.length - 1) { 		// only show Scroll buttons if there is more than one item		// and if we are not alread at the last item		CTabItem tabItem = items[items.length-1];		int tabStopX = tabItem.x + tabItem.width;		Rectangle area = super.getClientArea();		if (tabStopX > area.x + area.width - borderRight) {			return true;	// not all tabs fit in the client area		}	}	return false;}