Mega Code Archive
JCheckBox setMnemonic
<![CDATA[
/*
* 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.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyEvent;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JCheckBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/*
* CheckBoxDemo.java requires 16 image files in the images/geek directory:
* geek-----.gif, geek-c---.gif, geek--g--.gif, geek---h-.gif, geek----t.gif,
* geek-cg--.gif, ..., geek-cght.gif.
*/
public class CheckBoxDemo extends JPanel implements ItemListener {
JCheckBox chinButton;
JCheckBox glassesButton;
JCheckBox hairButton;
JCheckBox teethButton;
/*
* Four accessory choices provide for 16 different combinations. The image for
* each combination is contained in a separate image file whose name indicates
* the accessories. The filenames are "geek-XXXX.gif" where XXXX can be one of
* the following 16 choices. The "choices" StringBuffer contains the string
* that indicates the current selection and is used to generate the file name
* of the image to display.
*
* ---- //zero accessories
*
* c--- //one accessory -g-- --h- ---t
*
* cg-- //two accessories c-h- c--t -gh- -g-t --ht
*
* -ght //three accessories c-ht cg-t cgh-
*
* cght //all accessories
*/
StringBuffer choices;
JLabel pictureLabel;
public CheckBoxDemo() {
super(new BorderLayout());
// Create the check boxes.
chinButton = new JCheckBox("Chin");
chinButton.setMnemonic(KeyEvent.VK_C);
chinButton.setSelected(true);
glassesButton = new JCheckBox("Glasses");
glassesButton.setMnemonic(KeyEvent.VK_G);
glassesButton.setSelected(true);
hairButton = new JCheckBox("Hair");
hairButton.setMnemonic(KeyEvent.VK_H);
hairButton.setSelected(true);
teethButton = new JCheckBox("Teeth");
teethButton.setMnemonic(KeyEvent.VK_T);
teethButton.setSelected(true);
// Register a listener for the check boxes.
chinButton.addItemListener(this);
glassesButton.addItemListener(this);
hairButton.addItemListener(this);
teethButton.addItemListener(this);
// Indicates what's on the geek.
choices = new StringBuffer("cght");
// Set up the picture label
pictureLabel = new JLabel();
pictureLabel.setFont(pictureLabel.getFont().deriveFont(Font.ITALIC));
updatePicture();
// Put the check boxes in a column in a panel
JPanel checkPanel = new JPanel(new GridLayout(0, 1));
checkPanel.add(chinButton);
checkPanel.add(glassesButton);
checkPanel.add(hairButton);
checkPanel.add(teethButton);
add(checkPanel, BorderLayout.LINE_START);
add(pictureLabel, BorderLayout.CENTER);
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
}
/** Listens to the check boxes. */
public void itemStateChanged(ItemEvent e) {
int index = 0;
char c = '-';
Object source = e.getItemSelectable();
if (source == chinButton) {
index = 0;
c = 'c';
} else if (source == glassesButton) {
index = 1;
c = 'g';
} else if (source == hairButton) {
index = 2;
c = 'h';
} else if (source == teethButton) {
index = 3;
c = 't';
}
// Now that we know which button was pushed, find out
// whether it was selected or deselected.
if (e.getStateChange() == ItemEvent.DESELECTED) {
c = '-';
}
// Apply the change to the string.
choices.setCharAt(index, c);
updatePicture();
}
protected void updatePicture() {
// Get the icon corresponding to the image.
ImageIcon icon = createImageIcon("images/geek/geek-" + choices.toString()
+ ".gif");
pictureLabel.setIcon(icon);
pictureLabel.setToolTipText(choices.toString());
if (icon == null) {
pictureLabel.setText("Missing Image");
} else {
pictureLabel.setText(null);
}
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = CheckBoxDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* 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.
JFrame frame = new JFrame("CheckBoxDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the content pane.
JComponent newContentPane = new CheckBoxDemo();
newContentPane.setOpaque(true); // content panes must be opaque
frame.setContentPane(newContentPane);
// 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();
}
});
}
}
]]>