java.awt.event

Interface ContainerListener

All Superinterfaces:
EventListener
Known Implementing Classes:
AWTEventMulticaster, BasicToolBarUI.ToolBarContListener, Container.AccessibleAWTContainer.AccessibleContainerHandler, ContainerAdapter, JComponent.AccessibleJComponent.AccessibleContainerHandler, MetalToolBarUI.MetalContainerListener

public interface ContainerListener
extends EventListener

The listener interface for receiving container events. The class that is interested in processing a container event either implements this interface (and all the methods it contains) or extends the abstract ContainerAdapter class (overriding only the methods of interest). The listener object created from that class is then registered with a component using the component's addContainerListener method. When the container's contents change because a component has been added or removed, the relevant method in the listener object is invoked, and the ContainerEvent is passed to it.

Container events are provided for notification purposes ONLY; The AWT will automatically handle add and remove operations internally so the program works properly regardless of whether the program registers a ComponentListener or not.

Since:
1.1
See Also:
ContainerAdapter, ContainerEvent, Tutorial: Writing a Container Listener, Reference: The Java Class Libraries (update file)

Method Summary

void
componentAdded(ContainerEvent e)
Invoked when a component has been added to the container.
void
componentRemoved(ContainerEvent e)
Invoked when a component has been removed from the container.

Method Details

componentAdded

public void componentAdded(ContainerEvent e)
Invoked when a component has been added to the container.
Usages and Demos :

View More Examples of componentAdded(ContainerEvent e)
   1: 
   2: public class JMenuProxy extends JMenu implements MenuProxy, ActionListener, ChangeListener, PropertyChangeListener, ContainerListener, MenuListener
   3: {
   4:         ...
   5: 
   6:   private ContainerListener listener = null;
   7: 
   8:         ...
   9: 
  10:   public JMenuProxy(JMenu menu, Container parent, ContainerListener listener)
  11:   {
  12:         ...
  13:   {
  14:     listener.componentAdded(null);

View Full Code Here
   1: {
   2:   public static MenuProxy getProxy(Component component, Component parentComponent, ContainerListener listener)
   3:   {
   4:         ...
   5: 
   6: class JMenuExtender extends JComponent implements MenuProxy, ActionListener, ChangeListener, PropertyChangeListener, ContainerListener, MenuListener
   7: {
   8:         ...
   9: 
  10:   private ContainerListener listener = null;
  11: 
  12:         ...
  13:   {
  14:     listener.componentAdded(null);

View Full Code Here

componentRemoved

public void componentRemoved(ContainerEvent e)
Invoked when a component has been removed from the container.