private JLabel makeLabelIcon() {
ImageIcon i = new ImageIcon(getClass().getResource("duke.gif"));
Dimension d = new Dimension(i.getIconWidth(), i.getIconHeight());
final BufferedImage image = new BufferedImage(d.width, d.height, BufferedImage.TYPE_INT_ARGB);
Graphics g = image.createGraphics();
i.paintIcon(null, g, 0, 0);
g.dispose();
final JLabel icon =
new JLabel(i) {
@Override
public boolean contains(int x, int y) {
return super.contains(x, y) && ((image.getRGB(x, y) >> 24) & 0xff) != 0;
}
};
icon.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
MouseAdapter l =
new MouseAdapter() {
private final transient Point start = new Point();
private Point loc;
@Override
public void mousePressed(MouseEvent me) {
start.setLocation(me.getPoint());
}
@Override
public void mouseDragged(MouseEvent me) {
loc = icon.getLocation(loc);
int x = loc.x - start.x + me.getX();
int y = loc.y - start.y + me.getY();
icon.setLocation(x, y);
}
};
icon.addMouseListener(l);
icon.addMouseMotionListener(l);
icon.setBounds(new Rectangle(22, 22, d.width, d.height));
return icon;
}
