void (RadRootContainer rootContainer, RadButtonGroup group, Graphics g) { List<RadComponent> components = rootContainer.getGroupContents(group); if (components.size() < 2) return; Rectangle[] allBounds = new Rectangle[components.size()]; int lastTop = -1; int minLeft = Integer.MAX_VALUE; for (int i = 0; i < components.size(); i++) { final Rectangle rc = SwingUtilities.convertRectangle( components.get(i).getParent().getDelegee(), components.get(i).getBounds(), rootContainer.getDelegee() ); allBounds[i] = rc; minLeft = Math.min(minLeft, rc.x); if (i == 0) { lastTop = rc.y; } else if (lastTop != rc.y) { lastTop = Integer.MIN_VALUE; } } Graphics2D g2d = (Graphics2D)g; Stroke oldStroke = g2d.getStroke(); g2d.setStroke(new BasicStroke(2.0f)); g2d.setColor(new Color(104, 107, 130)); if (lastTop != Integer.MIN_VALUE) { // all items in group have same Y int left = Integer.MAX_VALUE; int right = Integer.MIN_VALUE; for (Rectangle rc : allBounds) { final int midX = (int)rc.getCenterX(); left = Math.min(left, midX); right = Math.max(right, midX); g2d.drawLine(midX, lastTop - 8, midX, lastTop); } g2d.drawLine(left, lastTop - 8, right, lastTop - 8); } else { int top = Integer.MAX_VALUE; int bottom = Integer.MIN_VALUE; for (Rectangle rc : allBounds) { final int midY = (int)rc.getCenterY(); top = Math.min(top, midY); bottom = Math.max(bottom, midY); g2d.drawLine(minLeft - 8, midY, rc.x, midY); } g2d.drawLine(minLeft - 8, top, minLeft - 8, bottom); } g2d.setStroke(oldStroke); }