Re: Tooltips usage

From:

Vova Reznik <address@mail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 02 Aug 2006 13:18:38 GMT

Message-ID:

<OC1Ag.1757$kO3.1502@newssvr12.news.prodigy.com>

k0m0r wrote:

Hi.
I've been trying to solve it myself, but I simply don't get it :(

I've got a JSlider and I need to print it's value in a tooltip that
appears at the cursor position every time mouse enters the
slider or changes its value (the tooltip should "chase" mouse
position).
I've been trying this:

class JProxySlider extends JSlider
    implements ChangeListener {

JToolTip tip = new JToolTip();

JProxySlider() {
    .....
    tip.setComponent(this);
    this.addChangeListener(this);
}

public void stateChanged(ChangeEvent e) {
    tip.setToolTipText(this.getValue()+"");
    tip.setVisible(true);
}
}

but I can't figure out how to fire the tooltip popup.
I found also ToolTipManager, but I can't force it
to work with this one.

Please help.

k0m0r

All you need is to overright
public String getToolTipText(MouseEvent event) {
         return "" + getValue();
     }
of JComponent and call setToolTipText in a constructor.

import java.awt.BorderLayout;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JSlider;

class JProxySlider extends JSlider {
     JProxySlider() {
         super(5, 25);
         setToolTipText(this.getValue() + "");
     }

     public String getToolTipText(MouseEvent event) {
         return "" + getValue();
     }

     public static void main(String agrs[]) {
         JFrame f = new JFrame();
         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         f.getContentPane().add(new JProxySlider(), BorderLayout.CENTER);
         f.getContentPane().add(new JProxySlider(), BorderLayout.NORTH);
         f.getContentPane().add(new JProxySlider(), BorderLayout.SOUTH);
         f.setLocationRelativeTo(null);
         f.pack();
         f.setVisible(true);
     }
}