JOptionPane affecting JTabbedPane

[Ben Wong]

Hi

I am using a JTabbedPane with 4 different tabs displaying a form on each.
I have a button below the JTabbedPane that when pressed checks if all the required fields have been entered. If not then i use a JOptionPane to notify the user.

The problem is when the user clicks "OK" the JTabbedPane disappears and the screen is left with the contents of the first tab.

Anyone know what I am doing wrong?

[Michael Dunn]

post a small compilable program that demonstrates the behaviour

just a frame, a JTabbedPane with 4 tabs (each holding just a JPanel),
the button, and the code that dislays the JOptionPane

[Ben Wong]

Problem is, each panel has its own class that extends JPanel. The JButton listener checks if the relevant fields have been complete on each JPanel by calling a method to each class.

I've tried relocating the JOptionPane.showMessageDialog() method to each of the JPanel classes instead of the JTabbedPane class but the same thing happens: the JTabbedPane disappears when the "OK" button is pressed.
[ April 05, 2006: Message edited by: Ben Wong ]

[Michael Dunn]

OK, lets do this in reverse.

here's a simple example of your description - add the code to make it disappear

    
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Testing extends JFrame
{
  TabPanel[] tabPanels = new TabPanel[4];
  public Testing()
  {
    setSize(300,200);
    setLocation(300,200);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    JTabbedPane tp = new JTabbedPane();
    for(int x = 0; x < tabPanels.length; x++)
    {
      tabPanels[x] = new TabPanel(""+(x+1));
      tp.addTab("Tab "+(x+1),tabPanels[x]);
    }
    JPanel p = new JPanel();
    JButton btn = new JButton("OK");
    p.add(btn);
    getContentPane().add(tp,BorderLayout.CENTER);
    getContentPane().add(p,BorderLayout.SOUTH);
    btn.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent ae){
        boolean fieldsFilledIn = true;
        for(int x = 0; x < tabPanels.length; x++)
        {
          if(tabPanels[x].dataComplete() == false)
          {
            fieldsFilledIn = false;
            break;
          }
        }
        JOptionPane.showMessageDialog(getContentPane(),
        "data is "+(fieldsFilledIn? "valid":"invalid"));}});
  }
  public static void main(String[] args){new Testing().setVisible(true);}
}
class TabPanel extends JPanel
{
  JTextField tf;
  public TabPanel(String str)
  {
    tf = new JTextField(str,10);
    add(tf);
  }
  public boolean dataComplete()
  {
    return !tf.getText().equals("");
  }
}