JMenu with no JMenuItem

I have this:

settingsMenu.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

settingsMenuActionPerformed(evt);

}

});

private void settingsMenuActionPerformed(java.awt.event.ActionEvent evt) {

HelpFrame help = new HelpFrame();

help.setVisible(true);

}

When I click on settings no frame is shown...I tried it in a JMenuItem and it works.

Thanks for the replies ;)

naskara at 2007-7-8 1:44:28 >

You need to add a MenuListener to the higher level menu. See attached sample working code.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

public class MenuTest

{

public static void main(String args[])

{

new MenuTestFrame();

}

}

class MenuTestFrame extends JFrame implements ActionListener

{

JMenuBar mb = new JMenuBar();

JMenu file = new JMenu("File");

JMenu edit = new JMenu("Edit");

JMenu view = new JMenu("View");

JMenu help = new JMenu("Help");

JMenuItem fileOpen = new JMenuItem("Open...");

JSeparator separator = new JSeparator();

JMenuItem fileSaveAs = new JMenuItem("Save As...");

JMenuItem editCut = new JMenuItem("Cut");

JMenuItem editCopy = new JMenuItem("Copy");

JMenuItem editPaste = new JMenuItem("Paste");

JMenuItem helpAbout = new JMenuItem("About...");

MenuTestFrame()

{

super();

/* Components should be added to the container's content pane */

Container cp = getContentPane();

/* Add menu items to menus */

file.add(fileOpen);

file.add(separator);

file.add(fileSaveAs);

edit.add(editCut);

edit.add(editCopy);

edit.add(editPaste);

help.add(helpAbout);

/* Add menus to menubar */

mb.add(file);

mb.add(edit);

mb.add(view);

mb.add(help);

/* Set menubar */

setJMenuBar(mb);

/* Add the action listeners */

fileOpen.addActionListener(this);

fileSaveAs.addActionListener(this);

editCut.addActionListener(this);

editCopy.addActionListener(this);

editPaste.addActionListener(this);

helpAbout.addActionListener(this);

/* Add menu listener */

view.addMenuListener(new MenuListener() {

public void menuCanceled(MenuEvent evt) {}

public void menuDeselected(MenuEvent evt) {}

public void menuSelected(MenuEvent evt)

{

SwingUtilities.invokeLater(new Runnable() {

public void run() {

JOptionPane.showMessageDialog(MenuTestFrame.this,"Menu test dialog!","Message",JOptionPane.INFORMATION_MESSAGE);

}

});

}

});

/* Add the window listener */

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent evt)

{

dispose();

System.exit(0);

}

});

/* Size the frame */

setSize(200,200);

/* Center the frame */

Dimension screenDim = Toolkit.getDefaultToolkit().getScreenSize();

Rectangle frameDim = getBounds();

setLocation((screenDim.width - frameDim.width) / 2,(screenDim.height - frameDim.height) / 2);

/* Show the frame */

setVisible(true);

}

public void actionPerformed(ActionEvent evt)

{

Object obj = evt.getSource();

if (obj == fileOpen);

else if (obj == fileSaveAs);

else if (obj == editCut);

else if (obj == editCopy);

else if (obj == editPaste);

else if (obj == helpAbout);

}

}

paternostroa at 2007-7-8 1:44:28 >