Re: how to use ToolTip' functions on a Graphics area?

Vinicius Pereira wrote:


The example you posted to John shows a different tooltip based on the
location on the panel. That is very easily done by overriding the
JComponent.getToolTipText(MouseEvent) method. See the modified example
below.

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

public class test extends JApplet {
     public void init() {
         JPanel p = new JPanel() {
             public String getToolTipText(MouseEvent me) {
                 int x = me.getX();
                 int y = me.getY();
                 int halfH = getHeight() / 2;
                 int halfW = getWidth() / 2;

                 if (x < halfW && y < halfH)
                     return "Northwest";
                 else if (x > halfW && y < halfH)
                     return "Northeast";
                 else if (x < halfW && y > halfH)
                     return "Southwest";
                 else
                     return "Southeast";
             }
         };
         p.setPreferredSize(new Dimension(100,75));
         p.setBackground(Color.BLUE);
         add(p);
     }

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 test t = new test();
                 t.init();
                 f.add(t,BorderLayout.CENTER);
                 f.pack();
                 f.setVisible(true);
             }
         });
     }
}

--

Knute Johnson
email s/nospam/knute2009/

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