eventlistener.java

来自「Micro Window Toolkit(MWT)是一个用于开发J2ME用户界面」· Java 代码 · 共 39 行

/*
 * MWT - Micro Window Toolkit
 * Copyright (C) 2007 Lucas Domanico - [e-mail]
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 * 		http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 * 		http://j2me-mwt.sourceforge.net/
 */

package mwt;

/**
 * <p>An event listener interface defines the method used to dispatch events.</p>
 * 
 * <p>Due to the small device's limitations, there is not an event listener hierarchy.<br>
 * Instead, events are classified by an integer value.<br>
 * Negative values are reserved for future MWT extensions and 0 is used for undefined
 * event types.</p>
 */
public interface EventListener {
	/** Constant for undefined event types. */
	final static public int EVENT_UNDEFINED = 0;
	/** Constant for action event types. */
	final static public int EVENT_ACTION = -1;

	/**
	 * Processes an event.<br>
	 * Parameters depend on how the caller invokes the event. However, the event type
	 * should be an EventListener EVENT_* constant (or any custom event type) and
	 * the component should be the sender.
	 * @param eventType The event type
	 * @param c An optional component
	 * @param args Optional args
	 */
	public void processEvent(int eventType, Component c, Object[] args);
}