Re: Detecting Mouse Over Tab on JTabbedPane

From:

Michael Rauscher <michlmann@gmx.de>

Newsgroups:

comp.lang.java.programmer

Date:

Sun, 03 Sep 2006 18:17:04 +0200

Message-ID:

<edev23$2hmk$1@registered.motzarella.org>

Hi,

Hal Vaughan schrieb:

(The ... contained all the code above.) I replaced "doSomethingUseful()"
with "System.out.println("Tab index: " + ix)" and it never printed
anything, so I finally added "System.out.println("Movement...");" before
the line to get the JTabbedPane from the event and never got a printout
from there.

Most probably didn't add the mouse motion listener to the tabbed pane...

import java.awt.event.*;
import javax.swing.*;

public class Test {
     private MouseMotionListener listener = new MouseMotionAdapter() {
         private int oldIx = -1;

         public void mouseMoved( MouseEvent e ) {
             JTabbedPane tp = (JTabbedPane)e.getSource();
             int ix = tp.indexAtLocation( e.getX(), e.getY() );

             if ( ix == oldIx )
                 return;

             oldIx = ix;

             if ( ix == -1 )
                 return;

             System.out.println("You're over tab " + ix );
         }
     };

     private void createAndShowGUI() {
         JTabbedPane tabbedPane = new JTabbedPane();
         tabbedPane.addMouseMotionListener( listener );

         tabbedPane.addTab( "Tab 1", new JPanel() );
         tabbedPane.addTab( "Tab 2", new JPanel() );

         JFrame frame = new JFrame("Test");
         frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
         frame.getContentPane().add( tabbedPane );
         frame.pack();
         frame.setVisible(true);
     }

     public static final void main( String args[] ) {
         new Test().createAndShowGUI();
     }
}

Bye
Michael