InternalFrameEventDemo.java Source code

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Here is the source code for InternalFrameEventDemo.java

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/*
 * 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.
 */

/*
 * InternalFrameEventDemo.java requires no other files.
 */

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.WindowConstants;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameListener;

public class InternalFrameEventDemo extends JFrame implements InternalFrameListener, ActionListener {
    JTextArea display;
    JDesktopPane desktop;
    JInternalFrame displayWindow;
    JInternalFrame listenedToWindow;
    static final String SHOW = "show";
    static final String CLEAR = "clear";
    String newline = "\n";
    static final int desktopWidth = 500;
    static final int desktopHeight = 300;

    public InternalFrameEventDemo(String title) {
        super(title);

        // Set up the GUI.
        desktop = new JDesktopPane();
        desktop.putClientProperty("JDesktopPane.dragMode", "outline");
        // Because we use pack, it's not enough to call setSize.
        // We must set the desktop's preferred size.
        desktop.setPreferredSize(new Dimension(desktopWidth, desktopHeight));
        setContentPane(desktop);

        createDisplayWindow();
        desktop.add(displayWindow); // DON'T FORGET THIS!!!
        Dimension displaySize = displayWindow.getSize();
        displayWindow.setSize(desktopWidth, displaySize.height);
    }

    // Create the window that displays event information.
    protected void createDisplayWindow() {
        JButton b1 = new JButton("Show internal frame");
        b1.setActionCommand(SHOW);
        b1.addActionListener(this);

        JButton b2 = new JButton("Clear event info");
        b2.setActionCommand(CLEAR);
        b2.addActionListener(this);

        display = new JTextArea(3, 30);
        display.setEditable(false);
        JScrollPane textScroller = new JScrollPane(display);
        // Have to supply a preferred size, or else the scroll
        // area will try to stay as large as the text area.
        textScroller.setPreferredSize(new Dimension(200, 75));
        textScroller.setMinimumSize(new Dimension(10, 10));

        displayWindow = new JInternalFrame("Event Watcher", true, // resizable
                false, // not closable
                false, // not maximizable
                true); // iconifiable
        JPanel contentPane = new JPanel();
        contentPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.PAGE_AXIS));
        b1.setAlignmentX(CENTER_ALIGNMENT);
        contentPane.add(b1);
        contentPane.add(Box.createRigidArea(new Dimension(0, 5)));
        contentPane.add(textScroller);
        contentPane.add(Box.createRigidArea(new Dimension(0, 5)));
        b2.setAlignmentX(CENTER_ALIGNMENT);
        contentPane.add(b2);

        displayWindow.setContentPane(contentPane);
        displayWindow.pack();
        displayWindow.setVisible(true);
    }

    public void internalFrameClosing(InternalFrameEvent e) {
        displayMessage("Internal frame closing", e);
    }

    public void internalFrameClosed(InternalFrameEvent e) {
        displayMessage("Internal frame closed", e);
    }

    public void internalFrameOpened(InternalFrameEvent e) {
        displayMessage("Internal frame opened", e);
    }

    public void internalFrameIconified(InternalFrameEvent e) {
        displayMessage("Internal frame iconified", e);
    }

    public void internalFrameDeiconified(InternalFrameEvent e) {
        displayMessage("Internal frame deiconified", e);
    }

    public void internalFrameActivated(InternalFrameEvent e) {
        displayMessage("Internal frame activated", e);
    }

    public void internalFrameDeactivated(InternalFrameEvent e) {
        displayMessage("Internal frame deactivated", e);
    }

    // Add some text to the text area.
    void displayMessage(String prefix, InternalFrameEvent e) {
        String s = prefix + ": " + e.getSource();
        display.append(s + newline);
        display.setCaretPosition(display.getDocument().getLength());
    }

    // Handle events on the two buttons.
    public void actionPerformed(ActionEvent e) {
        if (SHOW.equals(e.getActionCommand())) {
            // They clicked the Show button.

            // Create the internal frame if necessary.
            if (listenedToWindow == null) {
                listenedToWindow = new JInternalFrame("Event Generator", true, // resizable
                        true, // closable
                        true, // maximizable
                        true); // iconifiable
                // We want to reuse the internal frame, so we need to
                // make it hide (instead of being disposed of, which is
                // the default) when the user closes it.
                listenedToWindow.setDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE);

                // Add an internal frame listener so we can see
                // what internal frame events it generates.
                listenedToWindow.addInternalFrameListener(this);

                // And we mustn't forget to add it to the desktop pane!
                desktop.add(listenedToWindow);

                // Set its size and location. We'd use pack() to set the size
                // if the window contained anything.
                listenedToWindow.setSize(300, 100);
                listenedToWindow.setLocation(desktopWidth / 2 - listenedToWindow.getWidth() / 2,
                        desktopHeight - listenedToWindow.getHeight());
            }

            // Show the internal frame.
            listenedToWindow.setVisible(true);

        } else { // They clicked the Clear button.
            display.setText("");
        }
    }

    /**
     * Create the GUI and show it. For thread safety, this method should be
     * invoked from the event-dispatching thread.
     */
    private static void createAndShowGUI() {
        // Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);

        // Create and set up the window.
        JFrame frame = new InternalFrameEventDemo("InternalFrameEventDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        // Schedule a job for the event-dispatching thread:
        // creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}