/* * 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 events;/* * WindowEventDemo */import java.awt.*;import java.awt.event.*;import javax.swing.*;public class WindowEventDemo extends JFrame        implements WindowListener,        WindowFocusListener,        WindowStateListener {    static final String newline = System.getProperty("line.separator");    static final  String space = "    ";    static WindowEventDemo frame = new WindowEventDemo("WindowEventDemo");    JTextArea display;        public static void main(String[] args) {        /* Use an appropriate Look and Feel */        try {            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");            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 dispatch thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }       /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */        private static void createAndShowGUI() {        //Create and set up the window.        frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);                //Set up the content pane.        frame.addComponentsToPane();                //Display the window.        frame.pack();        frame.setVisible(true);    }        private void addComponentsToPane() {        display = new JTextArea();        display.setEditable(false);        JScrollPane scrollPane = new JScrollPane(display);        scrollPane.setPreferredSize(new Dimension(500, 450));        getContentPane().add(scrollPane, BorderLayout.CENTER);                addWindowListener(this);        addWindowFocusListener(this);        addWindowStateListener(this);                checkWM();    }        public WindowEventDemo(String name) {        super(name);    }        //Some window managers don't support all window states.    public void checkWM() {        Toolkit tk = frame.getToolkit();        if (!(tk.isFrameStateSupported(Frame.ICONIFIED))) {            displayMessage(                    "Your window manager doesn't support ICONIFIED.");        }  else displayMessage(                "Your window manager supports ICONIFIED.");        if (!(tk.isFrameStateSupported(Frame.MAXIMIZED_VERT))) {            displayMessage(                    "Your window manager doesn't support MAXIMIZED_VERT.");        }  else displayMessage(                "Your window manager supports MAXIMIZED_VERT.");        if (!(tk.isFrameStateSupported(Frame.MAXIMIZED_HORIZ))) {            displayMessage(                    "Your window manager doesn't support MAXIMIZED_HORIZ.");        } else displayMessage(                "Your window manager supports MAXIMIZED_HORIZ.");        if (!(tk.isFrameStateSupported(Frame.MAXIMIZED_BOTH))) {            displayMessage(                    "Your window manager doesn't support MAXIMIZED_BOTH.");        } else {            displayMessage(                    "Your window manager supports MAXIMIZED_BOTH.");        }    }        public void windowClosing(WindowEvent e) {        displayMessage("WindowListener method called: windowClosing.");        //A pause so user can see the message before        //the window actually closes.        ActionListener task = new ActionListener() {            boolean alreadyDisposed = false;            public void actionPerformed(ActionEvent e) {                if (frame.isDisplayable()) {                    alreadyDisposed = true;                    frame.dispose();                }            }        };        Timer timer = new Timer(500, task); //fire every half second        timer.setInitialDelay(2000);        //first delay 2 seconds        timer.setRepeats(false);        timer.start();    }        public void windowClosed(WindowEvent e) {        //This will only be seen on standard output.        displayMessage("WindowListener method called: windowClosed.");    }        public void windowOpened(WindowEvent e) {        displayMessage("WindowListener method called: windowOpened.");    }        public void windowIconified(WindowEvent e) {        displayMessage("WindowListener method called: windowIconified.");    }        public void windowDeiconified(WindowEvent e) {        displayMessage("WindowListener method called: windowDeiconified.");    }        public void windowActivated(WindowEvent e) {        displayMessage("WindowListener method called: windowActivated.");    }        public void windowDeactivated(WindowEvent e) {        displayMessage("WindowListener method called: windowDeactivated.");    }        public void windowGainedFocus(WindowEvent e) {        displayMessage("WindowFocusListener method called: windowGainedFocus.");    }        public void windowLostFocus(WindowEvent e) {        displayMessage("WindowFocusListener method called: windowLostFocus.");    }        public void windowStateChanged(WindowEvent e) {        displayStateMessage(                "WindowStateListener method called: windowStateChanged.", e);    }        private void displayMessage(String msg) {        display.append(msg + newline);        System.out.println(msg);    }        private void displayStateMessage(String prefix, WindowEvent e) {        int state = e.getNewState();        int oldState = e.getOldState();        String msg = prefix                + newline + space                + "New state: "                + convertStateToString(state)                + newline + space                + "Old state: "                + convertStateToString(oldState);        displayMessage(msg);    }        private String convertStateToString(int state) {        if (state == Frame.NORMAL) {            return "NORMAL";        }        String strState = " ";        if ((state & Frame.ICONIFIED) != 0) {            strState += "ICONIFIED";        }        //MAXIMIZED_BOTH is a concatenation of two bits, so        //we need to test for an exact match.        if ((state & Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_BOTH) {            strState += "MAXIMIZED_BOTH";        } else {            if ((state & Frame.MAXIMIZED_VERT) != 0) {                strState += "MAXIMIZED_VERT";            }            if ((state & Frame.MAXIMIZED_HORIZ) != 0) {                strState += "MAXIMIZED_HORIZ";            }        }        if (" ".equals(strState)){            strState = "UNKNOWN";        }        return strState.trim();    }}