Bug 283631 [CSS] ETabFolder in CTabFolder mode top/bottom keylines differ
bundles/org.eclipse.e4.ui.widgets/src/org/eclipse/e4/ui/widgets/ETabFolder.java
if (i != selectedIndex
				&& event.getBounds().intersects(items[i].getBounds())) {
			items[i].onPaint(gc, false);
		}
	}
	
	if (selectedIndex != -1) {
		CTabItem item = items[selectedIndex];
		item.onPaint(gc, true);
	} else {
		
		int x1 = borderLeft;
		int y1 = borderTop + tabHeight;
		int x2 = size.x - borderRight;
		gc.setForeground(borderColor);
		gc.drawLine(x1, y1, x2, y1);
	}
	
	drawChevron(gc);
	drawMinimize(gc);
	drawMaximize(gc);
	
	if (borderLeft > 0) {
		RGB outside = getParent().getBackground().getRGB();
		antialias(shape, borderColor.getRGB(), null, outside, gc);
		gc.setForeground(borderColor);
		gc.drawPolyline(shape);
	}
}
boolean setItemLocation() {