trayiconpopupsimpleitem.java

系统图标,是一个很简单的java 小程序

/***
 * Windows Tray Icon
 * -----------------
 *
 * Written by Jan Struyf
 *
 *  [e-mail]
 *  http://jeans.studentenweb.org/java/trayicon/trayicon.html
 *
 * Please mail me if you
 *	- 've found bugs
 *	- like this program
 *	- don't like a particular feature
 *	- would like something to be modified
 *
 * I always give it my best shot to make a program useful and solid, but
 * remeber that there is absolutely no warranty for using this program as
 * stated in the following terms:
 *
 * THERE IS NO WARRANTY FOR THIS PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
 * LAW. THE COPYRIGHT HOLDER AND/OR OTHER PARTIES WHO MAY HAVE MODIFIED THE
 * PROGRAM, PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
 * TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
 * PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
 * REPAIR OR CORRECTION.
 *
 * IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL ANY COPYRIGHT HOLDER,
 * OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM,
 * BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
 * CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
 * PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
 * INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
 * PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
 * PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * May the Force be with you... Just compile it & use it!
 */

package com.jeans.trayicon;

import java.util.*;
import java.awt.event.*;

// Menu item for Tray Icon
public class TrayIconPopupSimpleItem implements TrayIconPopupItem {

	// Menu item's name
	protected String m_Item;
	// Menu item's id (used by native code)
	protected int m_MenuId;
	// Enable / Disable menu item
	protected boolean m_Enabled;
	// Set item as default
	protected boolean m_Default;
	// Owner of this menu item
	protected WindowsTrayIcon m_TrayIcon;	
	// Action m_Listeners for menu item
	private Vector m_Listeners;

/**
 * Create a new menu item
 *
 * Param item = name of new item
 */
	public TrayIconPopupSimpleItem(String item) {
		m_Item = item;
		m_Enabled = true;
	}
	
/**
 * Return the name of this item
 */
	public String getName() {
	    return m_Item;
	}

/**
 * Add an ActionLister to this menu item
 * Just like with java.awt.Button or javax.swing.JButton
 *
 * Param listener = your listener
 */
	public void addActionListener(ActionListener listener) {
		if (m_Listeners == null) m_Listeners = new Vector();
		m_Listeners.addElement(listener);
	}

/****************************************************************************************************************
 *                                                                                                              *
 * Next section is for inter use only -- or for hackers :O)                                                     *
 *                                                                                                              *
 ****************************************************************************************************************/

/**
 * Return submenu depth - used by WindowsTrayIcon.setPopup()/initPopup()
 */
	public int getNbLevels() {
		return 0;
	}
	
/**
 * Enable/Disable item
 *
 * Param enable = enable/disable item?
 */
	public void setEnabled(boolean enable) {
		m_Enabled = enable;
		if (m_TrayIcon != null) 
		    m_TrayIcon.modifyPopup(m_MenuId, WindowsTrayIcon.POPUP_MODE_ENABLE, m_Enabled);
	}	
	
/**
 * Set item as default
 *
 * Param def = set item as default?
 */
	public void setDefault(boolean def) {
		m_Default = def;
		if (m_TrayIcon != null) {
		    m_TrayIcon.modifyPopup(m_MenuId, WindowsTrayIcon.POPUP_MODE_DEFAULT, m_Default);
        }
	}		

/**
 * Callback when user selects menu item (find it by comparing menu id's)
 *
 * Param menuId = the id of the selected item
 */
	public boolean onSelected(int menuId) {
		boolean selected = menuId == m_MenuId;
		if (selected && m_Listeners != null) {
			ActionEvent evt = new ActionEvent(this,0,"");
			for (Enumeration enum = m_Listeners.elements(); enum.hasMoreElements(); ) {
				ActionListener listener = (ActionListener)enum.nextElement();
				listener.actionPerformed(evt);
			}
		}
		return selected;
	}

/**
 * Create menu in native library - used by WindowsTrayIcon.setPopup()
 *
 * Param trayicon = the owner of this menu
 * Param id = the icon's id
 * Param level = the level (submenu depth)
 */
	public void setTrayIcon(WindowsTrayIcon trayicon, int id, int level) {
	    int extra = m_Enabled ? WindowsTrayIcon.POPUP_MODE_ENABLE : 0;
	    if (m_Default) extra |= WindowsTrayIcon.POPUP_MODE_DEFAULT;
		m_MenuId = trayicon.subPopup(id, level, m_Item, WindowsTrayIcon.POPUP_TYPE_ITEM, extra);
        m_TrayIcon = trayicon;		
	}
}