Mega Code Archive
Extends WindowAdapter
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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.
*/
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
/* Framework.java requires no other files. */
public class Framework extends WindowAdapter {
public int numWindows = 0;
private Point lastLocation = null;
private int maxX = 500;
private int maxY = 500;
public Framework() {
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
maxX = screenSize.width - 50;
maxY = screenSize.height - 50;
makeNewWindow();
}
public void makeNewWindow() {
JFrame frame = new MyFrame(this);
numWindows++;
System.out.println("Number of windows: " + numWindows);
if (lastLocation != null) {
// Move the window over and down 40 pixels.
lastLocation.translate(40, 40);
if ((lastLocation.x > maxX) || (lastLocation.y > maxY)) {
lastLocation.setLocation(0, 0);
}
frame.setLocation(lastLocation);
} else {
lastLocation = frame.getLocation();
}
System.out.println("Frame location: " + lastLocation);
frame.setVisible(true);
}
// This method must be evoked from the event-dispatching thread.
public void quit(JFrame frame) {
if (quitConfirmed(frame)) {
System.out.println("Quitting.");
System.exit(0);
}
System.out.println("Quit operation not confirmed; staying alive.");
}
private boolean quitConfirmed(JFrame frame) {
String s1 = "Quit";
String s2 = "Cancel";
Object[] options = { s1, s2 };
int n = JOptionPane.showOptionDialog(frame,
"Windows are still open.\nDo you really want to quit?",
"Quit Confirmation", JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE, null, options, s1);
if (n == JOptionPane.YES_OPTION) {
return true;
} else {
return false;
}
}
public void windowClosed(WindowEvent e) {
numWindows--;
System.out.println("Number of windows = " + numWindows);
if (numWindows <= 0) {
System.out.println("All windows gone. Bye bye!");
System.exit(0);
}
}
/**
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
*/
private static void createAndShowGUI() {
Framework framework = new Framework();
}
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();
}
});
}
class MyFrame extends JFrame {
protected Dimension defaultSize = new Dimension(200, 200);
protected Framework framework = null;
public MyFrame(Framework controller) {
super("New Frame");
framework = controller;
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
addWindowListener(framework);
JMenu menu = new JMenu("Window");
menu.setMnemonic(KeyEvent.VK_W);
JMenuItem item = null;
// close
item = new JMenuItem("Close");
item.setMnemonic(KeyEvent.VK_C);
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Close window");
MyFrame.this.setVisible(false);
MyFrame.this.dispose();
}
});
menu.add(item);
// new
item = new JMenuItem("New");
item.setMnemonic(KeyEvent.VK_N);
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("New window");
framework.makeNewWindow();
}
});
menu.add(item);
// quit
item = new JMenuItem("Quit");
item.setMnemonic(KeyEvent.VK_Q);
item.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("Quit request");
framework.quit(MyFrame.this);
}
});
menu.add(item);
JMenuBar menuBar = new JMenuBar();
menuBar.add(menu);
setJMenuBar(menuBar);
setSize(defaultSize);
}
}
}
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