Demonstrating the ContainerListener

  
import java.awt.Component;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ContainerEvent;
import java.awt.event.ContainerListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class ContainerTest {
  public static void main(String args[]) {
    JFrame frame = new JFrame();
    Container contentPane = frame.getContentPane();

    ContainerListener cont = new ContainerListener() {
      ActionListener listener = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
          System.out.println("Selected: " + e.getActionCommand());
        }
      };

      public void componentAdded(ContainerEvent e) {
        Component c = e.getChild();
        if (c instanceof JButton) {
          JButton b = (JButton) c;
          b.addActionListener(listener);
        }
      }

      public void componentRemoved(ContainerEvent e) {
        Component c = e.getChild();
        if (c instanceof JButton) {
          JButton b = (JButton) c;
          b.removeActionListener(listener);
        }
      }
    };

    contentPane.addContainerListener(cont);

    contentPane.setLayout(new GridLayout(3, 2));
    contentPane.add(new JButton("First"));
    contentPane.add(new JButton("Second"));
    contentPane.add(new JButton("Third"));
    contentPane.add(new JButton("Fourth"));
    contentPane.add(new JButton("Fifth"));

    frame.setSize(300, 200);
    frame.show();
  }
}

Related examples in the same category

1.	Display the addXXXListener methods of any Swing class
2.	Show events as they happen
3.	A demonstration of the ChangeEvents generated by the BoundedRangeModel
4.	An application that shows the Action class in, well, action
5.	Showing how to add Actions for KeyStrokes
6.	Sketch
7.	EventListenerList enabled Secret Label
8.	TextAction example
9.	StateChange Listener
10.	CheckBox Item Listener
11.	AncestorListener Demo
12.	KeyStroke Sample
13.	Focus Next Component Sample
14.	PropertyChangeListener Sample
15.	Timer Sample
16.	KeyListener, ActionListener Demo 1
17.	KeyListener, ActionListener Demo 2
18.	Action, Mouse Focus
19.	Swing Action Demo
20.	Load Save Action
21.	Demonstrating the WindowListener with a WindowAdapter
22.	Demonstrating the ActionListener
23.	Demonstrating the AdjustmentListener
24.	Demonstrating the AncestorListener
25.	Demonstrating the ComponentListener
26.	A ComponentAdapter.
27.	JAR Archives: Pack Progress Monitor
28.	A position of a window on the screen.
29.	Using ComponentListener to catch the JFrame Maximization event
30.	Demonstrating the FocusListener
31.	Demonstrating the HyperlinkListener
32.	Demonstrating the InternalFrameListener
33.	Demonstrating the ItemListener
34.	Implement a graphical list selection monitor
35.	ItemListener for JRadioButton
36.	Demonstrating the KeyListener
37.	Demonstrating the MenuListener
38.	Demonstrating the MouseListener and MouseMotionListener
39.	Demonstrating the MouseWheelListener
40.	Demonstrating the PopupMenuListener
41.	Demonstrating the WindowListener
42.	implements VetoableChangeListener to block focus change events
43.	Responding to Keystrokes
44.	Focus Event Demo
45.	Container Event Demo
46.	Component Event Demo
47.	Window Event Demo
48.	Handle a window closing event
49.	Installs/resets a ComponentListener to resize the given window to minWidth/Height if needed

Demonstrating the ContainerListener : Various Event Listener « Event « Java

Related examples in the same category