[mpyhajar]

Hi,

I'm writing a small register program GUI. I have a problem with ActionListener in JMenu. I wrote a JPanel which creates a JMenu and that works just fine. The problem is that id doesn't give any event signals. I have another class which impelemets ActionListener and it works fine with JButton (another panel for buttons), but not with JMenu.

Below is the JPanel for JMenu and Application which implements the ActionListener. Do you see anything wrong? I really can't imagine why I cannot get the action signals. JPanel is defined in JFrame as it should be. Have you got any ideas?

Regards,
Marko

class MenuPanel extends JPanel {

protected JMenuBar menuBar;
protected JMenu menu;
protected JMenuItem loadRegister;
protected JMenuItem saveRegister;
protected JMenuItem information;
protected JMenuItem quit;

public MenuPanel(Application application) {
menuBar = new JMenuBar();

menu = new JMenu("Tiedosto");

loadRegister = new JMenuItem("Lataa");
loadRegister.addActionListener(application);

saveRegister = new JMenuItem("Talleta");
saveRegister.addActionListener(application);

information = new JMenuItem("Tietoja");
information.addActionListener(application);

quit = new JMenuItem("Lopeta"); quit.addActionListener(application);

menu.add(loadRegister);
menu.add(saveRegister);
menu.addSeparator();
menu.add(information);
menu.add(quit);

menuBar.add(menu);

}
}

class Application implements ActionListener {

// Define CardPanel
private CardPanel cardPanel;

// Define linked list for cards
private CardList cardList = null;

// Constructor. Initializes cardPanel and cardList
public Application(CardPanel cardPanelRefrence) {
cardPanel = cardPanelRefrence;
cardList = new CardList();
}

public void actionPerformed(ActionEvent action) {
String actionPerformed = action.getActionCommand();

if (actionPerformed.equals("Lataa")) {
load();
}
if (actionPerformed.equals("Talleta")) {
save();
}
if (actionPerformed.equals("Tietoja")) {
info();
}
if (actionPerformed.equals("Lopeta")) {
System.exit(0);
}
}

// Continues with the methods...

[mpyhajar]

Well, I found the answer. Heh, quite easy one but it took a while before I found it..

Just if you ever have similar problem. The problem was that in my JFrame I didn't create an object of class (Application) which implement s the ActionListener before using it as a reference in creating JPanel object. Quite confusing explanation, but here the code. This code was in my JFrame which was not included in this question.

private Application application;
private MenuPanel menuPanel;

application = new Application(cardPanel, rightInfoPanel);
menuPanel = new MenuPanel(application);

These two were introduced other way round, so that variable "application" was null. What a problem in fact.. :)

- Marko

[shmoove]

How did you manage to reach this forum with that question is beyond me...