Name: boT120536 Date: 07/31/2001


java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)

A JButton's ButtonModel seems to give incorrect results for the isArmed() and
isPressed() methods. In particular, isArmed() is true whenever the mouse is
over the button, and isPressed() is true when the mouse button has been pressed
but not released. This contradicts the docs at
http://java.sun.com/j2se/1.3/docs/api/javax/swing/ButtonModel.html.

If I'm reading the docs correctly, this actually appears to be a problem with
BasicButtonListener, which calls setArmed(true) during mouseEntered and fails
to call setArmed(false) during mouseReleased. It also mistakenly calls
setPressed(true) during mousePressed, and then calls setPressed(false) instead
of setPressed(true) during mouseReleased.

Here's an easy test:

import javax.swing.*;
import javax.swing.event.*;

public class Test extends JFrame implements ChangeListener {

   JButton b;
   
   public static void main (String[] args) {
      new Test();
   }

   public Test () {
      b = new JButton("Press me");
      b.addChangeListener(this);
      getContentPane().add(b);
      setSize(100,100);
      setVisible(true);
   }

   public void stateChanged (ChangeEvent e) {
      System.out.println("isArmed "+b.getModel().isArmed());
      System.out.println("isPressed "+b.getModel().isPressed());
      System.out.println("isRollover "+b.getModel().isRollover());
      System.out.println();
   }

}
(Review ID: 126082)
======================================================================