@Override
public Pair<Image, Point> createDraggedImage(DnDAction action, Point dragOrigin) {
final TreePath[] paths = getSelectionPaths();
if (paths == null) return null;
final int count = paths.length;
final JLabel label = new JLabel(String.format("%s item%s", count, count == 1 ? "" : "s"));
label.setOpaque(true);
label.setForeground(myTree.getForeground());
label.setBackground(myTree.getBackground());
label.setFont(myTree.getFont());
label.setSize(label.getPreferredSize());
final BufferedImage image =
UIUtil.createImage(label.getWidth(), label.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = (Graphics2D) image.getGraphics();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f));
label.paint(g2);
g2.dispose();
return new Pair<Image, Point>(
image, new Point(-image.getWidth(null), -image.getHeight(null)));
}
