java.awt.event

Interface ComponentListener

All Superinterfaces:
EventListener
Known Implementing Classes:
AWTEventMulticaster, BasicInternalFrameUI.ComponentHandler, BasicSliderUI.ComponentHandler, BasicTreeUI.ComponentHandler, Component.AccessibleAWTComponent.AccessibleAWTComponentHandler, ComponentAdapter, JViewport.ViewListener

public interface ComponentListener
extends EventListener

The listener interface for receiving component events. The class that is interested in processing a component event either implements this interface (and all the methods it contains) or extends the abstract ComponentAdapter class (overriding only the methods of interest). The listener object created from that class is then registered with a component using the component's addComponentListener method. When the component's size, location, or visibility changes, the relevant method in the listener object is invoked, and the ComponentEvent is passed to it.

Component events are provided for notification purposes ONLY; The AWT will automatically handle component moves and resizes internally so that GUI layout works properly regardless of whether a program registers a ComponentListener or not.

Since:
1.1
See Also:
ComponentAdapter, ComponentEvent, Tutorial: Writing a Component Listener, Reference: The Java Class Libraries (update file)

Method Summary

void
componentHidden(ComponentEvent e)
Invoked when the component has been made invisible.
void
componentMoved(ComponentEvent e)
Invoked when the component's position changes.
void
componentResized(ComponentEvent e)
Invoked when the component's size changes.
void
componentShown(ComponentEvent e)
Invoked when the component has been made visible.

Method Details

componentHidden

public void componentHidden(ComponentEvent e)
Invoked when the component has been made invisible.

componentMoved

public void componentMoved(ComponentEvent e)
Invoked when the component's position changes.

componentResized

public void componentResized(ComponentEvent e)
Invoked when the component's size changes.

componentShown

public void componentShown(ComponentEvent e)
Invoked when the component has been made visible.