trayicondemo.java

java tutorial.sun公司官方出品。java入门书籍。最新版

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

package misc;  
/*
 * TrayIconDemo.java
 */

import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import javax.swing.*;

public class TrayIconDemo {
    public static void main(String[] args) {
        /* Use an appropriate Look and Feel */
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
            //UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
        } catch (UnsupportedLookAndFeelException ex) {
            ex.printStackTrace();
        } catch (IllegalAccessException ex) {
            ex.printStackTrace();
        } catch (InstantiationException ex) {
            ex.printStackTrace();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }
        /* Turn off metal's use of bold fonts */
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        //Schedule a job for the event-dispatching thread:
        //adding TrayIcon.
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
    
    private static void createAndShowGUI() {
        //Check the SystemTray support
        if (!SystemTray.isSupported()) {
            System.out.println("SystemTray is not supported");
            return;
        }
        final PopupMenu popup = new PopupMenu();
        final TrayIcon trayIcon =
                new TrayIcon(createImage("images/bulb.gif", "tray icon"));
        final SystemTray tray = SystemTray.getSystemTray();
        
        // Create a popup menu components
        MenuItem aboutItem = new MenuItem("About");
        CheckboxMenuItem cb1 = new CheckboxMenuItem("Set auto size");
        CheckboxMenuItem cb2 = new CheckboxMenuItem("Set tooltip");
        Menu displayMenu = new Menu("Display");
        MenuItem errorItem = new MenuItem("Error");
        MenuItem warningItem = new MenuItem("Warning");
        MenuItem infoItem = new MenuItem("Info");
        MenuItem noneItem = new MenuItem("None");
        MenuItem exitItem = new MenuItem("Exit");
        
        //Add components to popup menu
        popup.add(aboutItem);
        popup.addSeparator();
        popup.add(cb1);
        popup.add(cb2);
        popup.addSeparator();
        popup.add(displayMenu);
        displayMenu.add(errorItem);
        displayMenu.add(warningItem);
        displayMenu.add(infoItem);
        displayMenu.add(noneItem);
        popup.add(exitItem);
        
        trayIcon.setPopupMenu(popup);
        
        try {
            tray.add(trayIcon);
        } catch (AWTException e) {
            System.out.println("TrayIcon could not be added.");
            return;
        }
        
        trayIcon.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null,
                        "This dialog box is run from System Tray");
            }
        });
        
        aboutItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null,
                        "This dialog box is run from the About menu item");
            }
        });
        
        cb1.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                int cb1Id = e.getStateChange();
                if (cb1Id == ItemEvent.SELECTED){
                    trayIcon.setImageAutoSize(true);
                } else {
                    trayIcon.setImageAutoSize(false);
                }
            }
        });
        
        cb2.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                int cb2Id = e.getStateChange();
                if (cb2Id == ItemEvent.SELECTED){
                    trayIcon.setToolTip("Sun TrayIcon");
                } else {
                    trayIcon.setToolTip(null);
                }
            }
        });
        
        ActionListener listener = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                MenuItem item = (MenuItem)e.getSource();
                //TrayIcon.MessageType type = null;
                System.out.println(item.getLabel());
                if ("Error".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.ERROR;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is an error message", TrayIcon.MessageType.ERROR);
                    
                } else if ("Warning".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.WARNING;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is a warning message", TrayIcon.MessageType.WARNING);
                    
                } else if ("Info".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.INFO;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is an info message", TrayIcon.MessageType.INFO);
                    
                } else if ("None".equals(item.getLabel())) {
                    //type = TrayIcon.MessageType.NONE;
                    trayIcon.displayMessage("Sun TrayIcon Demo",
                            "This is an ordinary message", TrayIcon.MessageType.NONE);
                }
            }
        };
        
        errorItem.addActionListener(listener);
        warningItem.addActionListener(listener);
        infoItem.addActionListener(listener);
        noneItem.addActionListener(listener);
        
        exitItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                tray.remove(trayIcon);
                System.exit(0);
            }
        });
    }
    
    //Obtain the image URL
    protected static Image createImage(String path, String description) {
        URL imageURL = TrayIconDemo.class.getResource(path);
        
        if (imageURL == null) {
            System.err.println("Resource not found: " + path);
            return null;
        } else {
            return (new ImageIcon(imageURL, description)).getImage();
        }
    }
}