Name: skT88420			Date: 07/13/99


1. Steps:

Run this program (code below) and close any tab except
the tab which is currently the last tab.  There will be NO
changeEvent fired.  In my sample code, changeEvents cause a
BANG followed by a number to be printed on System.out so you can
easily see which events cause changeEvents and which don't.

The reason why this happens probably is that the concept of
a state change must be INCORRECTLY based on which tab
INDEX is selected, rather than which ACTUAL TAB is selected.
So there is no changeEvent when you remove a tab which is not
the last tab since it does NOT cause a selected index change!!!

2. Source code:

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

public class JTabbedPaneBug extends JFrame {
	public JTabbedPaneBug() {
		super("If you remove ANY TAB except the last tab there is NO state change!");
		setSize(800, 300);
		Container mainContentPane = getContentPane();
		mainContentPane.setLayout(new BorderLayout(0,0));
		mainContentPane.add("Center", pain);
		JButton one = new JButton(REMOVE);
		JButton two = new JButton(REMOVE);
		JButton three = new JButton(REMOVE);
		JButton four = new JButton(REMOVE);
		JButton five = new JButton(REMOVE);
		JButton six = new JButton(REMOVE);
		JButton seven = new JButton(REMOVE);
		one.addActionListener(new Foo());
		two.addActionListener(new Foo());
		three.addActionListener(new Foo());
		four.addActionListener(new Foo());
		five.addActionListener(new Foo());
		six.addActionListener(new Foo());
		seven.addActionListener(new Foo());
		pain.addTab("one", one);
		pain.addTab("two", two);
		pain.addTab("three", three);
		pain.addTab("four", four);
		pain.addTab("five", five);
		pain.addTab("six", six);
		pain.addTab("seven", seven);
	}
	private static String REMOVE = "Click anywhere to remove the panel!";
	PaneAndSuffering pain = new PaneAndSuffering();
	class PaneAndSuffering extends JTabbedPane {
		protected void fireStateChanged() {
			super.fireStateChanged();
			System.out.println("BANG " + bangCount++);
		}
		private int bangCount = 0;
	}
	class Foo implements ActionListener {
		public void actionPerformed(ActionEvent e) {
			pain.removeTabAt(pain.getSelectedIndex());
			//if you can click the button it's the selected index
		}
	}
	public static void main(String[] args) {
		JTabbedPaneBug jtb = new JTabbedPaneBug();
		jtb.setVisible(true);
	}
}
(Review ID: 85497) 
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