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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<title>SwapLAF - /SwapLAF.java</title>
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Java/index.html">Java</a> > <a href="../../samplecode/Java/idxUserExperience-date.html">User Experience</a> > <A HREF="javascript:location.replace('index.html');">SwapLAF</A> >
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<div style="width:100%; position:fixed;"><div align="center" id="watermark" style="position: relative; margin-left:auto; margin-right:auto; z-index:20; width:500px;"><div class="legacybox"><h1>Not Recommended Document<span class=closebutton><a href="javascript:closeWatermark()"><img src="../../images/closebutton.png" width="14" height="14" border="0" alt="close button"></a></span></h1>
<p><strong>Important: </strong>The information in this document is <strong>Not Recommended</strong> and should not be used for new development.</p>
<div class="reflibtopic">
<p>Current information on this Reference Library topic can be found here:</p>
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<li><a href="http://developer.apple.com/referencelibrary/Java/idxUserExperience-date.html" target="_blank">Java > User Experience</a></li>
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<td><h1><div id="pagehead">SwapLAF</div></h1></td>
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<h2>/SwapLAF.java</h2>
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<p><strong><a href="SwapLAF.zip">Download Sample</a></strong> (“SwapLAF.zip”, 60.0K)<BR>
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<pre class="sourcecodebox">/*
File: SwapLAF.java
Abstract: Main class/logic for SwapLAF sample. See updateLookAndFeel() for main logic.
Version: 1.3
© Copyright 2005 Apple Computer, Inc. All rights reserved.
IMPORTANT: This Apple software is supplied to
you by Apple Computer, Inc. ("Apple") in
consideration of your agreement to the following
terms, and your use, installation, modification
or redistribution of this Apple software
constitutes acceptance of these terms. If you do
not agree with these terms, please do not use,
install, modify or redistribute this Apple
software.
In consideration of your agreement to abide by
the following terms, and subject to these terms,
Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this
original Apple software (the "Apple Software"),
to use, reproduce, modify and redistribute the
Apple Software, with or without modifications, in
source and/or binary forms; provided that if you
redistribute the Apple Software in its entirety
and without modifications, you must retain this
notice and the following text and disclaimers in
all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or
logos of Apple Computer, Inc. may be used to
endorse or promote products derived from the
Apple Software without specific prior written
permission from Apple. Except as expressly
stated in this notice, no other rights or
licenses, express or implied, are granted by
Apple herein, including but not limited to any
patent rights that may be infringed by your
derivative works or by other works in which the
Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS
IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING
THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF
THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
UNDER THEORY OF CONTRACT, TORT (INCLUDING
NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
package apple.dts.samplecode.swaplaf;
import java.awt.*;
import java.util.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import com.apple.mrj.*;
import javax.swing.*;
public class SwapLAF extends JFrame
implements ActionListener,
MRJAboutHandler,
MRJQuitHandler
{
static final String APP_TITLE = "SwapLAF";
static final String HELLO = "Hello World!";
static final String BUTTON_TEXT = "Sample Button";
static final String LAF = "Look-And-Feel";
static final String FONT_LABEL = "Label.font";
protected JMenu LAFMenu;
protected JMenuItem currentSelection, previousSelection;
protected ButtonGroup LAFGroup;
protected JLabel label;
protected JMenuBar mainMenuBar = new JMenuBar();
protected JButton sampleButton = new JButton(BUTTON_TEXT);
protected AboutBox aboutBox;
protected HashMap installedLAFs;
public SwapLAF() {
super(APP_TITLE);
UIManager.LookAndFeelInfo[] plafs = UIManager.getInstalledLookAndFeels();
installedLAFs = new HashMap(plafs.length);
for (int i = 0; i < plafs.length; i++){
installedLAFs.put(plafs[i].getName(), plafs[i].getClassName());
}
Container c = getContentPane();
c.setLayout(new BorderLayout());
LAFGroup = new ButtonGroup();
setUpLAFMenu();
setJMenuBar(mainMenuBar);
JPanel bottom = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 20));
bottom.add(sampleButton);
c.add(bottom, BorderLayout.SOUTH);
label = new JLabel(getMessage(), JLabel.CENTER);
label.setFont(label.getFont().deriveFont(36f));
c.add(label);
Toolkit.getDefaultToolkit();
MRJApplicationUtils.registerAboutHandler(this);
MRJApplicationUtils.registerQuitHandler(this);
setSize(400,180);
setLocation(200,200);
setVisible(true);
}
public void setUpLAFMenu() {
LAFMenu = new JMenu(LAF);
Iterator LAFNames = installedLAFs.keySet().iterator();
while (LAFNames.hasNext()) {
String name = (String)LAFNames.next();
JRadioButtonMenuItem jmi = new JRadioButtonMenuItem(name);
LAFMenu.add(jmi);
LAFGroup.add(jmi);
jmi.addActionListener(this);
if (installedLAFs.get(name).equals(UIManager.getLookAndFeel().getClass().getName())) {
jmi.setSelected(true);
currentSelection = jmi;
}
}
mainMenuBar.add(LAFMenu);
}
public String getMessage() {
String lafName = UIManager.getLookAndFeel().getName();
if (lafName != null) {
return "This is " + lafName;
} else {
return HELLO;
}
}
public void handleAbout() {
// create a new AboutBox every time to work around
// refresh latencies when changing LAF
aboutBox = new AboutBox(this);
aboutBox.show();
}
public void handleQuit() {
System.exit(0);
}
// ActionListener interface (for menus)
public void actionPerformed(ActionEvent newEvent) {
previousSelection = currentSelection;
currentSelection = (JMenuItem)newEvent.getSource();
String name = currentSelection.getText();
String className = (String) installedLAFs.get(name);
if (className != null) {
try {
updateLookAndFeel(name, className);
} catch (Exception e) {
System.out.println("Uh-oh..." + e);
}
}
}
/**
* Change the look-and-feel to the specified class.
* Alert the user if there were problems loading the PLAF.
* @param name (String) the presentable name for the class
* @param className (String) the className to be fed to the UIManager
* @see javax.swing.UIManager#setLookAndFeel
* @see javax.swing.SwingUtilities#updateComponentTreeUI
*/
public void updateLookAndFeel(String name, String className) {
try {
// Set the new look and feel, and update the sample message to reflect it.
UIManager.setLookAndFeel(className);
label.setText(getMessage());
// Grab the font from the LAF's defaults hash to use for the sample message
label.setFont(((Font)UIManager.getLookAndFeel().getDefaults().get(FONT_LABEL)).deriveFont(36f));
// Call for a UI refresh to the new LAF starting at the highest level
SwingUtilities.updateComponentTreeUI(this);
} catch (Exception e) {
String errMsg = "The " + name + " look-and-feel ";
if (e instanceof UnsupportedLookAndFeelException){
errMsg += "is not supported on this platform.";
} else if (e instanceof ClassNotFoundException){
errMsg += "could not be found.";
} else {
errMsg += "could not be loaded.";
System.out.println(e);
}
currentSelection = previousSelection;
currentSelection.setSelected(true);
JOptionPane.showMessageDialog(this, errMsg, APP_TITLE, JOptionPane.ERROR_MESSAGE);
}
}
public static void main(String args[]) {
new SwapLAF();
}
}
</pre>
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