JTabbedPane behaviour

Question

hello everyone,
I'm facing some issues with tab selection in JTabbedPane.
For example i have tabbed pane with 4 tabs. The second and third tab's contains data entry panels. I have overrode 'setVisible' method of JPanel class to ask user if he wants to save entered data or no if this data is not submitted to database.
When i enter data in second tab and try to select third or fourth tab (tab with index greater than tab which is now visible) without submitting data i have situation like this:
1) second tab is showing at the background; (good)
2) JDialog "do you want to save entered data" is showing over. (good)
In this case it all works like i want.
When i enter data in second tab (or third) and try to select first tab (tab with index less than tab witch is now visible) without submitting data i have situation like this:
1) FIRST tab is showing at the background; (!!! WRONG !!!, should be second)
2) JDialog "do you want to save entered data" is showing over. (good)
As i understand, when i select some tab, JTabbedPane iterates through Vector of all tab's from the begining and sets attributes (is it visble or not). Am i wrong? If it's true, how can i manage to work it right: first of all we hide old tab and only after this we show new tab?
Thanx for your suggestions! :)

Answer 1

Demo: selection can only go higher, or back to 0:
import java.awt.event.*;
import javax.swing.*;
public class TabbedPaneExample {
     public static void main(String[] args) {
          JTabbedPane pane = new JTabbedPane();
          for(int i=0; i<10; ++i)
               pane.addTab("tab #"+i, null);
          SingleSelectionModel model = new DefaultSingleSelectionModel() {
               public void setSelectedIndex(int index) {
                    if (index == 0 || index > getSelectedIndex())
                         super.setSelectedIndex(index);
          pane.setModel(model);
          JFrame f = new JFrame("TabbedPaneExample");
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          f.getContentPane().add(pane);
          f.setSize(400,100);
          f.setLocationRelativeTo(null);
          f.setVisible(true);
}