Hello!! I need to add a popupMenu to a menu

[andr33i_yo]

Hello!I have a big problem...I need to add a popupMenu to a menu from menuBar...

I want that when i press left click on menu to display the submenus and menuItems from that menu....but when i press right click on menu I want to display my popupMenu .

Please help me!
PS:my email address is andr33i_yo@yahoo.com

[Eranga]

Ok, what you have tried so far. Did you work out a pop-up menu first?

Look at some examples here

[andr33i_yo]

Yes i worked out with a popup menu....but a didn't succeed to do what i said before.I realy need to do that.Can you help me...with an example?

[Eranga]

Then added it into the menu bar, that's all. Where you stuck with?

[andr33i_yo]

I don't want to add a pupup menu to a menuBar...I want to add it to a menu from the menuBar.
Ok...here it is an example:

package components;

import java.awt.*;
import java.awt.event.*;
import javax.swing.JPopupMenu;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.ButtonGroup;
import javax.swing.JMenuBar;
import javax.swing.KeyStroke;
import javax.swing.ImageIcon;

import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.JFrame;

/* PopupMenuDemo.java requires images/middle.gif. */

/*
* Like MenuDemo, but with popup menus added.
*/
public class PopupMenuDemo implements ActionListener, ItemListener {
JTextArea output;
JScrollPane scrollPane;
String newline = "\n";

public JMenuBar createMenuBar() {
JMenuBar menuBar;
JMenu menu, submenu;
JMenuItem menuItem;
JRadioButtonMenuItem rbMenuItem;
JCheckBoxMenuItem cbMenuItem;

//Create the menu bar.
menuBar = new JMenuBar();

//Build the first menu.
menu = new JMenu("A Menu");
menu.setMnemonic(KeyEvent.VK_A);
menu.getAccessibleContext().setAccessibleDescripti on(
"The only menu in this program that has menu items");
menuBar.add(menu);

//a group of JMenuItems
menuItem = new JMenuItem("A text-only menu item",
KeyEvent.VK_T);
//menuItem.setMnemonic(KeyEvent.VK_T); //used constructor instead
menuItem.setAccelerator(KeyStroke.getKeyStroke(
KeyEvent.VK_1, ActionEvent.ALT_MASK));
menuItem.getAccessibleContext().setAccessibleDescr iption(
"This doesn't really do anything");
menuItem.addActionListener(this);
menu.add(menuItem);

ImageIcon icon = createImageIcon("images/middle.gif");
menuItem = new JMenuItem("Both text and icon", icon);
menuItem.setMnemonic(KeyEvent.VK_B);
menuItem.addActionListener(this);
menu.add(menuItem);

menuItem = new JMenuItem(icon);
menuItem.setMnemonic(KeyEvent.VK_D);
menuItem.addActionListener(this);
menu.add(menuItem);

//a group of radio button menu items
menu.addSeparator();
ButtonGroup group = new ButtonGroup();

rbMenuItem = new JRadioButtonMenuItem("A radio button menu item");
rbMenuItem.setSelected(true);
rbMenuItem.setMnemonic(KeyEvent.VK_R);
group.add(rbMenuItem);
rbMenuItem.addActionListener(this);
menu.add(rbMenuItem);

rbMenuItem = new JRadioButtonMenuItem("Another one");
rbMenuItem.setMnemonic(KeyEvent.VK_O);
group.add(rbMenuItem);
rbMenuItem.addActionListener(this);
menu.add(rbMenuItem);

//a group of check box menu items
menu.addSeparator();
cbMenuItem = new JCheckBoxMenuItem("A check box menu item");
cbMenuItem.setMnemonic(KeyEvent.VK_C);
cbMenuItem.addItemListener(this);
menu.add(cbMenuItem);

cbMenuItem = new JCheckBoxMenuItem("Another one");
cbMenuItem.setMnemonic(KeyEvent.VK_H);
cbMenuItem.addItemListener(this);
menu.add(cbMenuItem);

//a submenu
menu.addSeparator();
submenu = new JMenu("A submenu");
submenu.setMnemonic(KeyEvent.VK_S);

menuItem = new JMenuItem("An item in the submenu");
menuItem.setAccelerator(KeyStroke.getKeyStroke(
KeyEvent.VK_2, ActionEvent.ALT_MASK));
menuItem.addActionListener(this);
submenu.add(menuItem);

menuItem = new JMenuItem("Another item");
menuItem.addActionListener(this);
submenu.add(menuItem);
menu.add(submenu);

//Build second menu in the menu bar.
menu = new JMenu("Another Menu");
menu.setMnemonic(KeyEvent.VK_N);
menu.getAccessibleContext().setAccessibleDescripti on(
"This menu does nothing");
menuBar.add(menu);

return menuBar;
}

public Container createContentPane() {
//Create the content-pane-to-be.
JPanel contentPane = new JPanel(new BorderLayout());
contentPane.setOpaque(true);

//Create a scrolled text area.
output = new JTextArea(5, 30);
output.setEditable(false);
scrollPane = new JScrollPane(output);

//Add the text area to the content pane.
contentPane.add(scrollPane, BorderLayout.CENTER);

return contentPane;
}

public void createPopupMenu() {
JMenuItem menuItem;

//Create the popup menu.
JPopupMenu popup = new JPopupMenu();
menuItem = new JMenuItem("A popup menu item");
menuItem.addActionListener(this);
popup.add(menuItem);
menuItem = new JMenuItem("Another popup menu item");
menuItem.addActionListener(this);
popup.add(menuItem);

//Add listener to the text area so the popup menu can come up.
MouseListener popupListener = new PopupListener(popup);
output.addMouseListener(popupListener);
}

public void actionPerformed(ActionEvent e) {
JMenuItem source = (JMenuItem)(e.getSource());
String s = "Action event detected."
+ newline
+ " Event source: " + source.getText()
+ " (an instance of " + getClassName(source) + ")";
output.append(s + newline);
output.setCaretPosition(output.getDocument().getLe ngth());
}

public void itemStateChanged(ItemEvent e) {
JMenuItem source = (JMenuItem)(e.getSource());
String s = "Item event detected."
+ newline
+ " Event source: " + source.getText()
+ " (an instance of " + getClassName(source) + ")"
+ newline
+ " New state: "
+ ((e.getStateChange() == ItemEvent.SELECTED) ?
"selected":"unselected");
output.append(s + newline);
output.setCaretPosition(output.getDocument().getLe ngth());
}

// Returns just the class name -- no package info.
protected String getClassName(Object o) {
String classString = o.getClass().getName();
int dotIndex = classString.lastIndexOf(".");
return classString.substring(dotIndex+1);
}

/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = PopupMenuDemo.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("PopupMenuDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);

//Create/set menu bar and content pane.
PopupMenuDemo demo = new PopupMenuDemo();
frame.setJMenuBar(demo.createMenuBar());
frame.setContentPane(demo.createContentPane());

//Create and set up the popup menu.
demo.createPopupMenu();

//Display the window.
frame.setSize(450, 260);
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();
}
});
}

class PopupListener extends MouseAdapter {
JPopupMenu popup;

PopupListener(JPopupMenu popupMenu) {
popup = popupMenu;
}

public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}

public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}

private void maybeShowPopup(MouseEvent e) {
if (e.isPopupTrigger()) {
popup.show(e.getComponent(),
e.getX(), e.getY());
}
}
}
}

k...it is an example from java.sun.com.Now,I want to add the popup menu from this example to the first menu:"A Menu" from the menuBar, than I want to add this popup menu to the submenu: "A Submenu" from the menu "A Menu".Can you help me?

Thanks very much,
Andrew.

[Eranga]

andr33i_yo, I'm really confusing what you want to do here.

As you said, A Menu has a pop-up menu in this example. There is one item called A SubMenu, right? You want to have another pop-up menu on that A SubMenu item, is that right? So it's there. Correct me if I'm wrong.

[andr33i_yo]

K...I will tell you what I want to do.I want to create a kind of framework to create a menuBar in a frame dynamically.

I want to be able to right-click on any of menus in the menuBar and bring up a JPopupMenu showing some actions that can be performed on the menu(add an item,add a checkBox,add a submenu..etc ). A left click would simply open the menu as usual (Firefox and Explorer has this functionality already).

For example in FireFox or Internet Explorer if you left-click on menu "File" it will be display a popup menu but if you right-click on the same menu "File" it will be display a different popup menu.This is what I want to be able to do in my frame.

Andrew.
PS:I hope this time you will understand me...

[Eranga]

Yes, now it's clear what you want to do.

Did you go through that example code found from the Suns' tutorial? I don't think so. ;)

Did you see this code segment on the method createPopupMenu

        //Add listener to the text area so the popup menu can come up.
        MouseListener popupListener = new PopupListener(popup);
        output.addMouseListener(popupListener);

What have done here? NouseListner is added to the pop-up menu on the JTextAre, named as output. What happen when you right click on the JTextAre? You can see the pop-up menu by right-click. You want to do the same thing on your menu bar? So what you should do?

[andr33i_yo]

I'm very sorry if you think that i didn't study this example.If you try to run this simple example and try to put this popup menu on menu "A Menu" for example you would know now that it is a problem.By default in java when you right-click on a menu form the menuBar it is hapeninig the same think as it is hapeninig when you left-click.Please try to do that in this example than write me if you succsed.


Andrew.

[DarrylBurke]

I don't usually give out what I believe to be a full solution, but it is clear that you've already spent a lot of time on this.

Also, I'm not sure this is the best way this can be done, but it does appear to function as desired.

I didn't expect it, but when a JPopupMenu is parented to a JMenu, it remains inactive. Hence the parenting to the JMenuBar.

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.HashMap;
import java.util.Map;
import javax.swing.*;

public class MenuWithPopup {
   
   private Map<JMenu, MouseListener> menuMap = new HashMap<JMenu, MouseListener>();

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {

         @Override
         public void run() {
            new MenuWithPopup().makeUI();
         }
      });
   }

   public void makeUI() {
      JMenuItem onePopupItem = new JMenuItem("Popup One");
      JMenuItem twoPopupItem = new JMenuItem("Popup Two");
      JMenuItem threePopupItem = new JMenuItem("Popup Three");

      final JPopupMenu popupMenu = new JPopupMenu();
      popupMenu.add(onePopupItem);
      popupMenu.add(twoPopupItem);
      popupMenu.add(threePopupItem);

      JMenuItem oneItem = new JMenuItem("Item One");
      JMenuItem twoItem = new JMenuItem("Item Two");
      JMenuItem threeItem = new JMenuItem("Item Three");

      JMenu oneMenu = new JMenu("Menu One");
      oneMenu.add(oneItem);
      oneMenu.add(twoItem);
      oneMenu.add(threeItem);

      JMenuItem fourItem = new JMenuItem("Item Four");
      JMenuItem fiveItem = new JMenuItem("Item Five");
      JMenuItem sixItem = new JMenuItem("Item Six");

      JMenu twoMenu = new JMenu("Menu Two");
      twoMenu.add(fourItem);
      twoMenu.add(fiveItem);
      twoMenu.add(sixItem);

      final JMenuBar menuBar = new JMenuBar();
      menuBar.add(oneMenu);
      menuBar.add(twoMenu);

      MouseListener oneListener = oneMenu.getMouseListeners()[0];
      oneMenu.removeMouseListener(oneListener);
      menuMap.put(oneMenu, oneListener);
      
      MouseListener twoListener = twoMenu.getMouseListeners()[0];
      twoMenu.removeMouseListener(twoListener);
      menuMap.put(twoMenu, twoListener);

      final MouseListener customListener = new MouseListener() {

         boolean popupShown = false;

         public void mouseClicked(MouseEvent e) {
            menuMap.get(e.getComponent()).mouseClicked(e);
         }

         public void mousePressed(MouseEvent e) {
            if (e.getButton() == MouseEvent.BUTTON3) {
               popupMenu.show(menuBar,
                       e.getX() + e.getComponent().getX(), e.getY());
               popupShown = true;
            } else {
               menuMap.get(e.getComponent()).mousePressed(e);
            }
         }

         public void mouseReleased(MouseEvent e) {
            if (!popupShown) {
               menuMap.get(e.getComponent()).mouseReleased(e);
            }
         }

         public void mouseEntered(MouseEvent e) {
            menuMap.get(e.getComponent()).mouseEntered(e);
         }

         public void mouseExited(MouseEvent e) {
            menuMap.get(e.getComponent()).mouseExited(e);
         }
      };
      oneMenu.addMouseListener(customListener);
      twoMenu.addMouseListener(customListener);

      JFrame frame = new JFrame("Menus with Popup");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setSize(200, 100);
      frame.setLocationRelativeTo(null);
      frame.setJMenuBar(menuBar);
      frame.setVisible(true);
   }
}

Please post back if this isn't quite what you needed.

db

[andr33i_yo]

Thanks a lot Darryl.Burke!!

This is exactly what I want.It is realy important for me so I thank you again!


Andrew.