Sending event to display the ToolTipText

Question

HI Coders
I've extended Jpanel and I draw an Image inside it so that Jpanel is the viewport of the image.
In usual circumstances when i mouse over the image's viewport the ToolTip execute ,but in my case I need to execute the ToolTipText without actually mouse over the image's viewport, instead I need to press a button which in turn execute the ToolTipText that registered with that image�s viewport.
this is the code i used but its doesnt work:
public class NewToolTipTest extends JFrame
    private JLabel l;
    private JButton showTip;
    public NewToolTipTest()
        Image i = Toolkit.getDefaultToolkit().getImage( "someImage.gif" );
        ImageIcon ii = new ImageIcon( i );
        l = new JLabel( ii );
        l.setToolTipText( "Look, it's a ToolTip!" );
        getContentPane().add( l, BorderLayout.CENTER );
        showTip = new JButton( "Show Tip" );
        // Don't give the button a tooltip!  It will replace the
        // tooltip you want to show!
        //showTip.setToolTipText( "Push Me!" );
        showTip.addActionListener( new TipActivate() );
        getContentPane().add( showTip, BorderLayout.SOUTH );
        addWindowListener( new ExitHandler() );
    public static void main( String[] args )
        NewToolTipTest nttt = new NewToolTipTest();
        nttt.pack();
        nttt.setVisible( true );
    private class ExitHandler extends WindowAdapter
        public void windowClosing( WindowEvent event )
            System.exit( 0 );
    private class TipActivate implements ActionListener
        public void actionPerformed( ActionEvent event )
            ToolTipManager theManager = ToolTipManager.sharedInstance();
            MouseEvent toolTipEvent = new MouseEvent( l, MouseEvent.MOUSE_ENTERED,
                    System.currentTimeMillis(), 0, 0, 0, 0, false );
            theManager.mouseMoved( toolTipEvent );
            System.out.println( "ActionEvent launched!" );
}im using version 1.3 (Swing).
thanks in advance
Shay Gaghe

Answer 1

Hi,
Here is the code to show the tooltip programmatically where you want :
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestToolTip extends JPanel {
     Random r =new Random(System.currentTimeMillis());
     JButton b;
     ToolTipManager manager = ToolTipManager.sharedInstance();
     public TestToolTip() {
          manager.setInitialDelay(0);
          setPreferredSize(new Dimension(500,500));
          b= new JButton("Show tooltip at a random location");
          b.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    showToolTip();
     public void showToolTip() {
          int x = r.nextInt(499);
          int y = r.nextInt(499);
          MouseEvent e = new MouseEvent(this, MouseEvent.MOUSE_MOVED, 0, 0,x,y,0,false);
          manager.mouseMoved(e);
     public String getToolTipText(MouseEvent e) {
          return("Position : ("+e.getX()+","+e.getY()+")");
     public static void main(String[] args) {
          JFrame f = new JFrame("Frame");
          TestToolTip t = new TestToolTip();
          f.getContentPane().add(t, BorderLayout.CENTER);
          f.getContentPane().add(t.b, BorderLayout.NORTH);
          f.pack();
          f.setVisible(true);
}I hope this helps,
Denis