import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class DispatchEventDemo extends JFrame {
private JPanel container;
private final JLabel jLabel;
private final JLabel lbLocation;
private final JLabel lbSource;
public DispatchEventDemo() {
super("DispatchEventDemo");
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setSize(400, 300);
setLocationRelativeTo(null);
container = new JPanel(null);
container.setName("container");
getContentPane().add(container, BorderLayout.CENTER);
jLabel = new JLabel("Test");
jLabel.setName("jLabel");
jLabel.setBorder(BorderFactory.createLineBorder(Color.BLUE));
jLabel.setBounds(10, 10, 100, 22);
container.add(jLabel);
MouseAdapter mouseHandlerLabel = new MouseAdapter() {
@Override
public void mouseDragged(final MouseEvent e) {
Point point = e.getPoint();
point.translate(jLabel.getX(), jLabel.getY());
jLabel.setLocation(point);
container.dispatchEvent(e);
}
};
jLabel.addMouseMotionListener(mouseHandlerLabel);
MouseAdapter mouseHandlerPanel = new MouseAdapter() {
@Override
public void mouseDragged(final MouseEvent e) {
JComponent source = (JComponent) e.getSource();
MouseEvent evt = SwingUtilities.convertMouseEvent(source, e, container);
Point point = evt.getPoint();
lbLocation.setText(point.x + ", " + point.y);
lbSource.setText(source.getName());
}
};
container.addMouseMotionListener(mouseHandlerPanel);
//
JLabel lbLoc = new JLabel("Current drag position: ");
lbLoc.setBounds(150, 10, 140, 22);
container.add(lbLoc);
lbLocation = new JLabel();
lbLocation.setBounds(290, 10, 100, 22);
container.add(lbLocation);
//
JLabel lbSrc = new JLabel("Source: ");
lbSrc.setBounds(150, 30, 140, 22);
container.add(lbSrc);
lbSource = new JLabel();
lbSource.setBounds(290, 30, 100, 22);
container.add(lbSource);
}
public static void main(final String args[]) {
EventQueue.invokeLater(new Runnable() {
public void run() {
new DispatchEventDemo().setVisible(true);
}
});
}
}
