Adding JButton to multiple toolbars

[boroski]

I have created a button (Zoom) and an actionlistener for it.

Is it possible to add the same button to a a JPanel (making a button bar) as well as to a JToolBar, so that both invoke the same listener?

Cheers in advance

Boro

[ecriss]

You would need to create a new JButton. How you handle the ActionListener, however, depends on if you used the anonymous inner class approach or if you created a custom action listener by implementing the ActionListener interface.

If you created a custom ActionListener class, you simply add a single instance of that to both buttons:

MyActionListener listener = new MyActionListener();
JButton zoom = new JButton("Zoom");
JButton zoom2 = new JButton("Zoom");

zoom.addActionListener(listener);
zoom2.addActionListener(listener);

If you used anonymous inner class approach, you'll need to create a method that both buttons call:

JButton zoom = new JButton("Zoom");
JButton zoom2 = new JButton("Zoom");

zoom.addActionListener( new ActionListener() {
    public void actionPerformed(ActionEvent event) {
        doZoom(event);
   }
});

zoom2.addActionListener( new ActionListener() {
    public void actionPerformed(ActionEvent event) {
        doZoom(event);
   }
});

Then the method called by both listeners

public void doZoom(ActionEvent event) {
    //code to zoom
}

[cjard]

making a separate, non-anonymous, proper button handler would be better