ComponentListener (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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java.awt.event
Interface ComponentListener

All Superinterfaces:: EventListener

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

public interface ComponentListener
extends EventListener
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

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 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 Detail

componentResized

void componentResized(ComponentEvent e)

Invoked when the component's size changes.

componentMoved

void componentMoved(ComponentEvent e)

Invoked when the component's position changes.

componentShown

void componentShown(ComponentEvent e)

Invoked when the component has been made visible.

componentHidden

void componentHidden(ComponentEvent e)

Invoked when the component has been made invisible.