Hotel Menu Like Swing Component

Hi , I need a swing component which has the functionality as below
Initially, its looks like this
# Beverages
# Starters
# MainCourse
# Deserts
When the user clicks on > it should expand that menu item and show the individual items along with their icons.
# Beverages
       icon1 Tea
       icon2 Ice Tea
       icon3 Soft drink
# Starters
# MainCourse
# Deserts
Is there any readily available swing component which I can use for this behavior ?
It is ok even the swing component misses out expand functionality when the "#" is clicked.

But how can I set the icons to what I need ? Read the tutorial!!!
There is no way you could have read the tutorial and understand how a JTree works in 10 minutes.
So do some work on you own. Read the tutorial. Search the forum for examples.
We've pointed you in the right direction so do some learning on your own.

Similar Messages

Adding menu-like buttons to JToolBar (such as Back button in Netscape)

Hi,
I wonder wether it is possible to add a menu-like button to a JToolBar. I tried adding a JMenu but didn't succed, since the menu's visual appearance was completely messed up and, furthermore, it didn't respond to mouse clicks.
Any hints appreciated.
Janek.

To do that, I wrote 3 classes.
At the end, the new menu reacts and can be used exactly as a JMenu.
The first class is the menu class which extends JMenu :
import javax.swing.*;
* This class override the method boolean isTopLevelMenu() to
* allow a menu to be a top level menu in a JMenuBar and a JTollBar also !
public class MyMenu extends JMenu {
 public MyMenu() {
 super("");
 public MyMenu(String s) {
 super(s);
 public MyMenu(Action a) {
 super(a);
 public MyMenu(String s, boolean b) {
 super(s,b);
 * Returns true if the menu is a 'top-level menu', that is, if it is
 * the direct child of a menubar.
 * @return true if the menu is activated from the menu bar;
 * false if the menu is activated from a menu item
 * on another menu
 public boolean isTopLevelMenu() {
 if (getParent() instanceof JMenuBar || (getParent() instanceof JToolBar))
 return true;
 return false;
}The second class extends JToolBar. It is necessary to redefine the MenuBar behavior : When a menu is pressed, you can move the mouse over the other menus and they will open themselves, etc... So the toolbar must implements the interface MenuElement
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
* This class implements MenuElement to obtain the same behavior
* as a JMenuBar.
public class MyToolBar extends JToolBar implements MenuElement {
 public MyToolBar() {
 super();
 * Implemented to be a <code>MenuElement</code> -- does nothing.
 * @see #getSubElements
 public void processMouseEvent(MouseEvent event,MenuElement path[],MenuSelectionManager manager) {
 * Implemented to be a <code>MenuElement</code> -- does nothing.
 * @see #getSubElements
 public void processKeyEvent(KeyEvent e,MenuElement path[],MenuSelectionManager manager) {
 * Implemented to be a <code>MenuElemen<code>t -- does nothing.
 * @see #getSubElements
 public void menuSelectionChanged(boolean isIncluded) {
 * Implemented to be a <code>MenuElement</code> -- returns the
 * menus in this tool bar.
 * This is the reason for implementing the <code>MenuElement</code>
 * interface -- so that the menu bar can be treated the same as
 * other menu elements.
 * @return an array of menu items in the menu bar.
 public MenuElement[] getSubElements() {
 MenuElement result[];
 Vector tmp = new Vector();
 int c = getComponentCount();
 int i;
 Component m;
 for(i=0 ; i < c ; i++) {
 m = getComponent(i);
 if(m instanceof MenuElement)
 tmp.addElement(m);
 result = new MenuElement[tmp.size()];
 for(i=0,c=tmp.size() ; i < c ; i++)
 result[i] = (MenuElement) tmp.elementAt(i);
 return result;
 * Implemented to be a <code>MenuElement</code>. Returns this object.
 * @return the current <code>Component</code> (this)
 * @see #getSubElements
 public Component getComponent() {
 return this;
}The last class and morer difficult is the MenuUI. In my implementation, I use the WindowsLookAndFeel, so I redefine the WindowsMenuUI to look like Windows.
I give you my code also (please, imagine how difficult it was to write!) :
import com.sun.java.swing.plaf.windows.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicMenuUI;
import javax.swing.plaf.basic.BasicGraphicsUtils;
import javax.swing.event.MouseInputListener;
import javax.swing.*;
* Windows rendition of the component.
* 
* Warning:
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is appropriate
* for short term storage or RMI between applications running the same
* version of Swing. A future release of Swing will provide support for
* long term persistence.
public class MyWindowsMenuUI extends WindowsMenuUI {
 private boolean isMouseOver = false;
 private int shiftOffset = 0;
 private int defaultTextShiftOffset = 1;
 public static ComponentUI createUI(JComponent x) {
 return new MyWindowsMenuUI();
 * Draws the background of the menu.
 * @since 1.4
 protected void paintBackground(Graphics g, JMenuItem menuItem, Color bgColor) {
 ButtonModel model = menuItem.getModel();
 Color oldColor = g.getColor();
 int menuWidth = menuItem.getWidth();
 int menuHeight = menuItem.getHeight();
 UIDefaults table = UIManager.getLookAndFeelDefaults();
 Color highlight = table.getColor("controlLtHighlight");
 Color shadow = table.getColor("controlShadow");
 g.setColor(menuItem.getBackground());
 g.fillRect(0,0, menuWidth, menuHeight);
 clearTextShiftOffset();
 if(menuItem.isOpaque()) {
 if (model.isArmed()|| (menuItem instanceof JMenu && model.isSelected())) {
 // Draw a lowered bevel border
 g.setColor(shadow);
 g.drawLine(0,0, menuWidth - 1,0);
 g.drawLine(0,0, 0,menuHeight - 2);
 g.setColor(highlight);
 g.drawLine(menuWidth - 1,0, menuWidth - 1,menuHeight - 2);
 g.drawLine(0,menuHeight - 2, menuWidth - 1,menuHeight - 2);
 setTextShiftOffset();
 else
 if (isMouseOver() && model.isEnabled()) {
 // Draw a raised bevel border
 g.setColor(highlight);
 g.drawLine(0,0, menuWidth - 1,0);
 g.drawLine(0,0, 0,menuHeight - 2);
 g.setColor(shadow);
 g.drawLine(menuWidth - 1,0, menuWidth - 1,menuHeight - 2);
 g.drawLine(0,menuHeight - 2, menuWidth - 1,menuHeight - 2);
 else {
 g.setColor(menuItem.getBackground());
 g.fillRect(0,0, menuWidth, menuHeight);
 g.setColor(oldColor);
 * Method which renders the text of the current menu item.
 * 
 * @param g Graphics context
 * @param menuItem Current menu item to render
 * @param textRect Bounding rectangle to render the text.
 * @param text String to render
 * @since 1.4
 protected void paintText(Graphics g, JMenuItem menuItem, Rectangle textRect, String text) {
 ButtonModel model = menuItem.getModel();
 FontMetrics fm = g.getFontMetrics();
 int mnemonicIndex = menuItem.getDisplayedMnemonicIndex();
 // W2K Feature: Check to see if the Underscore should be rendered.
 if (WindowsLookAndFeel.isMnemonicHidden()) {
 mnemonicIndex = -1;
 Color oldColor = g.getColor();
 if(!model.isEnabled()) {
 // *** paint the text disabled
 if ( UIManager.get("MenuItem.disabledForeground") instanceof Color ) {
 g.setColor( UIManager.getColor("MenuItem.disabledForeground") );
 BasicGraphicsUtils.drawStringUnderlineCharAt(g,text, mnemonicIndex, textRect.x, textRect.y + fm.getAscent());
 else {
 g.setColor(menuItem.getBackground().brighter());
 BasicGraphicsUtils.drawStringUnderlineCharAt(g,text, mnemonicIndex, textRect.x, textRect.y + fm.getAscent());
 g.setColor(menuItem.getBackground().darker());
 BasicGraphicsUtils.drawStringUnderlineCharAt(g,text, mnemonicIndex, textRect.x - 1, textRect.y + fm.getAscent() - 1);
 else {
 // For Win95, the selected text color is the selection forground color
 if (WindowsLookAndFeel.isClassicWindows() && model.isSelected()) {
 g.setColor(selectionForeground); // Uses protected field.
 BasicGraphicsUtils.drawStringUnderlineCharAt(g,text, mnemonicIndex, textRect.x+getTextShiftOffset(), textRect.y + fm.getAscent()+getTextShiftOffset());
 g.setColor(oldColor);
 * Set the temporary flag to indicate if the mouse has entered the menu.
 private void setMouseOver(boolean over) {
 isMouseOver = over;
 * Get the temporary flag to indicate if the mouse has entered the menu.
 private boolean isMouseOver() {
 return isMouseOver;
 protected MouseInputListener createMouseInputListener(JComponent c) {
 return new WindowsMouseInputHandler();
 protected void clearTextShiftOffset(){
 shiftOffset = 0;
 protected void setTextShiftOffset(){
 shiftOffset = defaultTextShiftOffset;
 protected int getTextShiftOffset() {
 return shiftOffset;
 * This class implements a mouse handler that sets the rollover flag to
 * true when the mouse enters the menu and false when it exits.
 * @since 1.4
 protected class WindowsMouseInputHandler extends BasicMenuUI.MouseInputHandler {
 public void mousePressed(MouseEvent e) {
 JMenu menu = (JMenu)menuItem;
 if (!menu.isEnabled())
 return;
 MenuSelectionManager manager = MenuSelectionManager.defaultManager();
 if (menu.isTopLevelMenu()) {
 if (menu.isSelected()) {
 manager.clearSelectedPath();
 else {
 Container cnt = menu.getParent();
 if(cnt != null && (cnt instanceof JMenuBar || (cnt instanceof JToolBar))) {
 MenuElement me[] = new MenuElement[2];
 me[0]=(MenuElement)cnt;
 me[1]=menu;
 manager.setSelectedPath(me);
 MenuElement selectedPath[] = manager.getSelectedPath();
 if (!(selectedPath.length > 0 && selectedPath[selectedPath.length-1] == menu.getPopupMenu())) {
 if (menu.isTopLevelMenu() || menu.getDelay() == 0) {
 MenuElement newPath[] = new MenuElement[selectedPath.length+1];
 System.arraycopy(selectedPath,0,newPath,0,selectedPath.length);
 newPath[selectedPath.length] = menu.getPopupMenu();
 manager.setSelectedPath(newPath);
 else {
 setupPostTimer(menu);
 public void mouseEntered(MouseEvent evt) {
 super.mouseEntered(evt);
 if (!WindowsLookAndFeel.isClassicWindows()) {
 setMouseOver(true);
 menuItem.repaint();
 public void mouseExited(MouseEvent evt) {
 super.mouseExited(evt);
 if (!WindowsLookAndFeel.isClassicWindows()) {
 setMouseOver(false);
 menuItem.repaint();
}This UI simulate also the rollover effect.
And now here is a class to test this code (under 1.4 and Windows L&F):
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.basic.*;
public class MenuToolBar extends JFrame {
 public static String windowsUI = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
 public MenuToolBar() {
 super("Menu toolbar");
 setWindowsLF();
 addWindowListener(new WindowAdapter() {
 public void windowClosing(WindowEvent e) {
 System.exit(0);
 setBounds(312,250,412,200);
 MyMenu menu = new MyMenu("File");
 MyMenu menu2 = new MyMenu("Help");
 menu.add(new JMenuItem("Try"));
 MyToolBar tb = new MyToolBar();
 tb.firePropertyChange("JToolBar.isRollover", false, true);
 tb.add(menu);
 tb.add(menu2);
 JToggleButton jt = new JToggleButton("Toggle button", new ImageIcon("tog.gif"));
 jt.setFocusPainted(false);
 tb.add(jt);
 tb.addSeparator();
 JButton jb = new JButton("Button", new ImageIcon("but.gif"));
 jb.setFocusPainted(false);
 tb.add(jb);
 getContentPane().add(tb, BorderLayout.NORTH);
 setVisible(true);
 public static final void setWindowsLF() {
 try {
 UIManager.setLookAndFeel(windowsUI);
 UIManager.put("MenuUI", "MyWindowsMenuUI");
 catch (Exception exc) {
 System.err.println("Error loading L&F: " + exc);
 public static void main(String[] args) {
 new MenuToolBar();
}Execute that, to see if the result is OK for you!
Another thing : could you please report my name if you use and distribute the code ?
Tell me if this helps you!
Denis
[

New: awt is covering my swing component...

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can i use layeredpane to help?

here is a link to the Swing tutorial that mentions this problem:
http://java.sun.com/docs/books/tutorial/uiswing/start/swingIntro.html#awt
The Swing tutorial also has a section on converting from AWT to Swing. You should look at that.
Here is another article from the Swing Connection titled "Mixing Heavy and Light Components"
http://java.sun.com/products/jfc/tsc/articles/mixing/index.html
Like the previous post says, you are better off not to mix the two.

Swing component's margin in a frame

Hello all,
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As allways, many thanks in advance for your help.

Don't know if there is any direct way to get this information. But, assuming the border width/height is equal on all four sides you could try something like:
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Dimension contentD = frame.getContentPane().getSize();
int borderWidth = frameD.width - contentD.width;
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Hi all,
can anyone tell me how to create an Help menu in Swing??
i mean, like the Help menu options that you can see in Windows.
I mean, again, by clicking on the Help option, you should see Contents etc..
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thanx and regards
marco

There's no class called "HelpMenu" or anything like that, you'd have to create your own using tabbed panes and JTrees.

How to set a Swing component as Modal window on a SWT Component.?

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If I try to click on any other part of the Parent Window except Title bar ... the child window is working as a Modal Window.
Can any one suggest me to solve this one !!

int this case, do this :
JFrame f = new JFrame("Authentification");
f.getContentPane().setLayout(new BorderLayout());
f.getContentPane().add(myJPanel, BorderLayout.CENTER);
f.setBounds(x,y,w,h);
f.setVisible(true);
Where myJPanel is the Panel you developped.

Support for Multilingual Numeral Input in JTextField swing component

When the User Locale is changed from the regional & language options in the control panel and the standard digits are customized to a non Latin character set, all the windows applications adhere to the changes made. HTML also respects the changes in effect and displays any numeric values using the new character set, which are the national digits for many Eastern Locales such as Chinese, Arabic(Saudi Arabia), Urdu and many more. The JTextField swing component given by java, however, does not show any support to the new settings. Any numeric input is displayed in the Latin character set even when the input locale of the system is also changed respectively. Any text input for this case is correctly displayed in the desired literals and appropriate glyphs. However, unlike the AWT components, numeral input and display is not catered as per the user/developer's requirements. This behavior was first noticed in 2007, as far as i have found out, and was reported once again on the same thread in 2010. The thread is given below as a reference. No action or response has been taken. Kindly look into this matter and please let me know if this bug has been reported before and if there is any intent of providing a fix for it.
Reference: http://www.coderanch.com/t/344075/GUI/java/Multilingual-support-JTextField
Regards,
Aitzaz Ahmad
Software Engineer
SENSYS

I too had an itch to reply with something like this
This is a sign of work well done!
The WD has so strong UI abstraction, that hides client-server nature applications almost completely. If you search forum, you will even find posts where developers try to upgrade value of ProgressMeter in for loop )
VS

Swing component fires an event to non-GUI code

Hi all -- this is my first post in forums.sun.com.
Question to get me started -
I have a Swing component that fires an ActionEvent. I would like that ActionEvent to trigger code that does not run on the AWT Event Queue thread (some code that will take some time without impacting GUI rendering performance.)
I know I could put that Event's action command into a synchronized Queue, and have a worker thread checking the queue and taking action when it finds a command there. Likewise, I could flag a volatile boolean as true, and have a worker thread check the flag and take action when true.
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pkwooster: Yep. That's what I meant.
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Thank you.

And if you think, as I do, that a date picker is
standard component and should be part of the jdk,
please vote here:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=473
0041
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Please check this photo http://www.flickr.com/photos/39683118@N07/4483608081/
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For more help create a [SSCCE (Short, Self Contained, Compilable and Executable, Example Program)|http://sscce.org], that demonstrates the incorrect behaviour.

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package my.stuff;
import java.awt.*;
import javax.swing.*;
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 .addGroup(layout.createSequentialGroup()
 .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE)
 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
 .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
 pack();
 }// </editor-fold>
 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
 if (language.equals("english")) language = "spanish"; else language = "english";
 changeLabel();
 public static void main(String args[]) {
 java.awt.EventQueue.invokeLater(new Runnable() {
 public void run() {
 new TreeTest3().setVisible(true);
 // Variables declaration - do not modify
 private javax.swing.JButton jButton1;
 private javax.swing.JPanel jPanel1;
 private javax.swing.JPanel jPanel2;
 // End of variables declaration
}

It should be
 private void changeLabel()
 System.out.println("language = " + language);
 jPanel1.removeAll();
 jPanel1.add(new JLabel(language), "Center");
 jPanel1.revalidate();
 jPanel1.repaint();
 }

Performing KeyEvent on a Swing Component

How do I perform a KeyEvent (e.g. 'ENTER or '\n' on a swing component? or Mnemonice such as Alt-M to select a specific Menu option?

StanislavL wrote:
..You can use e.g. public synchronized void keyPress(int keycode) method of Robot class. Or if there is associated key binding you can get ActionMap of the component and find proper action then fire it.Given Robot is restricted to trusted/no security manager apps, using a key binding (if possible) seems the better solution.
Edit 1: added (..) caveat.
Edited by: Andrew Thompson on Mar 16, 2011 6:31 PM

How to embed swing component into javaFX ?

Maybe I missed sth, but can someone explain us how can we embed swing component into javaFX 2.0 ?
This was previously handled with javaFX "srcipt", why can't we do it anymore ?
As far as the work to migrate from 1.3 to 2.0 is hard and huge, why do fx2.0 do not offer such feature anymore ? :(
I know that ThingFx project try to cope with, but the current code doesn't match with my needs.
Thanks for help,
Edited by: tibO on 23 nov. 2011 14:35

I know this post is old and the original authors might not even ben active; but it essentiall gets to the heart of what I'm trying to.
I have a JDialogBox. In it I have a panel (which I have to change to a JScrollPane). Inside the JPanel I have a JLabel and a JTextArea.
I was told to; make it scrollable in the event that there is too much info for the JDialogBox and to add HTML formatting (simple stuff like bold and colors.
1) The JScrollBar doesn't seem to produce the scroll side bars.
2) I must not be implementing the JEditorPane correctly. I just substituted JEditorPane for JTextArea in my code and it returned a type converstion error. Is JEditorPane even the correct object to use? Should I be using JTextPane?
The reason I can't do this on a JLabel by JLabel basis is because I don't know how many labels I will need at each runtime. And I also have to have a swingtimer on it. I could create an array and loop around it to create the JLabels. But it seems a waste of commuting cycles. This is no good?

Swing component's opaque property

Recenetly I read an article about "Painting in AWT and Swing" and feel confused about some points in the article.
http://java.sun.com/products/jfc/tsc/articles/painting/index.html
The article mentioned several Swing Painting Guidelines, I have question about the following two paragraphs:
6. If a Swing component's opaque property is set to true, then it is agreeing to paint all of the bits contained within its bounds (this includes clearing it's own background within paintComponent()), otherwise screen garbage may result.
7. Setting either the opaque or optimizedDrawingEnabled properties to false on a component will cause more processing on each paint operation, therefore we recommend judicious use of both transparency and overlapping components.
For the No.7, it's said setting the opaque to false will cause more process on each paint operation, I think it should changed to ture, since if set opaque property to true, it will paint all the bits contained within bounds as described in No.6.
So is this an error? What on earth is efficient for the opaque property value?
Thanks!

For the No.7, it's said setting the opaque to false will cause more process on each paint operationWhen you create an application you do something like this:
create a frame
add a panel to the frame
add a component to the panel. (lets say a JButton)
When you click on a button you need to change the state of the button to look 'pressed'. So you need to repaint area on the screen where the button is painted.
If the button is opaque(true) then you simply paint the button in its new state because the button is responsible for painting its background and any custom painting.
if the button is opaque(false) then you don't paint the background which means you need to search for the parent of the button (in our example the panel). Once you find the parent you need to paint that area of the panel that the button overlays and then you do the custom painting of the button.
So either way you have to repaint the same area. Hopefully it makes sense that painting a single component would be more efficient than painting parts of two separate components and determining which two components to repaint and what area to repaint of each component.

Flicker with heavyweight swing component and setVisible(false) on Linux

Hi All,
I'm using Java 6 update 14 on Ubuntu Jaunty.
I'm developing a GUI for a system running linux. I'm using the Swing framework for the GUI but need to include 3D animation accelerated in hardware. I'm using the JOGL framework for applying the 3D animations which supplies one with two swing-like components, the GLJPanel and GLCanvas. These two components are lightweight and heavyweight swing components respectively.
The difficulty arises when adding the heavyweight GLCanvas component into the gui. Often I need to do a setVisible(false) on the component in which case the GLCanvas hides correctly, but shows a flicker before the background is displayed. On digging a little deeper I found that because the GLCanvas is heavyweight, on linux it calls down to the sun.awt.X11 classes to do the setVisible(false) on hide. The very deepest call, the xSetVisible(false) method of the XBaseWindow class, causes the component to be replaced by first a grey backgound, and then the correct background. This intermediate grey background is causing the flicker.
The source for the sun.awt.X11 packages was not available with the standard JDK 6 but I've found the open jdk source which matches the steps taken by the call. The xSetVisible method is as follows:
0667: public void xSetVisible(boolean visible) {
0668: if (log.isLoggable(Level.FINE))
0669: log.fine("Setting visible on " + this + " to " + visible);
0670: XToolkit.awtLock();
0671: try {
0672: this .visible = visible;
0673: if (visible) {
0674: XlibWrapper.XMapWindow(XToolkit.getDisplay(),
0675: getWindow());
0676: } else {
0677: XlibWrapper.XUnmapWindow(XToolkit.getDisplay(),
0678: getWindow());
0679: }
0680: XlibWrapper.XFlush(XToolkit.getDisplay());
0681: } finally {
0682: XToolkit.awtUnlock();
0683: }
0684: }I've found that the XlibWrapper.XFlush(XToolkit.getDisplay()) line (680) causes the grey to appear and then the XToolkit.awtUnlock(); line repaints the correct background.
Using the lightwieght GLJPanel resolves this issue as it is a light weight component but unfortunately I'm unable to use it as the target system does not have the GLX 1.3 libraries required because of intel chipset driver issues (it has GLX 1.2). I cannot enable the opengl pipline either (-Dsun.java2d.opengl=True) for the same reason.
Is there a way to configure a heavyweight component to avoid the operation in line 680? As far as I can tell, the flicker would disappear and the display would still be correctly rendered had this line not been executed. This problem is not present in windows.
I've put together a minimal example of the problem. It requires the JOGL 1.1.1 libraries in the classpath. They can be found here: [JOGL-download|https://jogl.dev.java.net/servlets/ProjectDocumentList?folderID=11509&expandFolder=11509&folderID=11508]
I've also found that running the program with the -Dsun.awt.noerasebackground=true vm argument reduces the flicker to just one incorrect frame.
The program creates a swing app with a button to switch between the GLCanvas and a normal JPanel. When switching from the GLCanvas to the JPanel a grey flicker is noticeable on Linux. Step through the code in debug mode to the classes mentioned above to see the grey flicker frame manifest.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.media.opengl.GLCanvas;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
import javax.swing.border.EmptyBorder;
public class SwitchUsingJInternalFrameSwappedExample {
 private static JPanel glPanel;
 private static JPanel mainPanel;
 private static JPanel swingPanel1;
 private static boolean state;
 private static JInternalFrame layerFrame;
 private static GLCanvas glCanvas;
 public static void main(String[] args) {
 state = true;
 JFrame frame = new JFrame();
 frame.setSize(800, 800);
 frame.setContentPane(getMainPanel());
 frame.setVisible(true);
 frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 frame.setBackground(Color.GREEN);
 // The main component.
 public static JPanel getMainPanel() {
 mainPanel = new JPanel();
 mainPanel.setBackground(new Color(0, 0, 255));
 mainPanel.setBorder(new EmptyBorder(new Insets(20, 20, 20, 20)));
 mainPanel.setLayout(new BorderLayout());
 mainPanel.add(getButton(), BorderLayout.NORTH);
 mainPanel.add(getAnimationPanel(), BorderLayout.CENTER);
 return mainPanel;
 // Switch button.
 private static JButton getButton() {
 JButton button = new JButton("Switch");
 button.addActionListener(new ActionListener() {
 @Override
 public void actionPerformed(ActionEvent e) {
 switchToOpenGl();
 return button;
 // Do the switch.
 protected static void switchToOpenGl() {
 // Make the OpenGL overlay visible / invisible.
 if (!state) {
 glCanvas.setVisible(false);
 } else {
 glCanvas.setVisible(true);
 state = !state;
 // Normal swing panel with buttons
 public static JPanel getNormalPanel() {
 if (swingPanel1 == null) {
 swingPanel1 = new JPanel();
 for (int i = 0; i < 10; i++) {
 swingPanel1.add(new JButton("Asdf" + i));
 swingPanel1.setBackground(Color.black);
 return swingPanel1;
 // Extra panel container just for testing whether background colors show through.
 public static JPanel getAnimationPanel() {
 if (glPanel == null) {
 glPanel = new JPanel(new BorderLayout());
 glPanel.setBorder(new EmptyBorder(new Insets(20, 20, 20, 20)));
 glPanel.setBackground(Color.YELLOW);
 glPanel.add(getLayerFrame(), BorderLayout.CENTER);
 return glPanel;
 // A component that has two layers (panes), one containing the swing components and one containing the OpenGl animation.
 private static JInternalFrame getLayerFrame() {
 if (layerFrame == null) {
 // Create a JInternalFrame that is not movable, iconifyable etc.
 layerFrame = new JInternalFrame(null, false, false, false, false);
 layerFrame.setBackground(new Color(155, 0, 0));
 layerFrame.setVisible(true);
 // Remove the title bar and border of the JInternalFrame.
 ((javax.swing.plaf.basic.BasicInternalFrameUI) layerFrame.getUI())
 .setNorthPane(null);
 layerFrame.setBorder(null);
 // Add a normal swing component
 layerFrame.setContentPane(getNormalPanel());
 // Add the OpenGL animation overlay on a layer over the content layer.
 layerFrame.setGlassPane(getGLCanvas());
 return layerFrame;
 // OpenGL component.
 public static GLCanvas getGLCanvas() {
 if (glCanvas == null) {
 glCanvas = new GLCanvas();
 glCanvas.setBackground(Color.CYAN);
 return glCanvas;
}

Oracle employees typically don't read these forums, you can report bugs here: http://bugs.sun.com/bugdatabase/

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