Combo Box Popups on Startup

[thebarslider]

Dear All,

I have what sounds like a simple problem but i'm stuck. All i want to do is open a combo box pop so you can view the drop down menu when the dialog is opened. My code is as follows:

this.setVisible(true);
this.showPopupCombo();

Where this is the dialog (this section of code is run inside InitDialog. And the method to show the drop down is:

public void showPopupCombo() {
if (!thingCombo.isPopupVisible()) {
thingCombo.setVisible(true);
thingCombo.setPopupVisible(true);
thingCombo.showPopup();
}
}

This always produces the Exception:

java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location

I understand that this means the component is not visable on the screen, i think this is because i am producing the Dialog box from a listener call on a text field. Although wherever i call the showComboPopup method from i always get the same error.

Hopefully someone can point me in the right direction. Its always the small errors that seem to get me.....Arrggh!

Mark.

 

[prosper]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class mycom2 extends JFrame implements ActionListener
      {
       String nameList[] = {"Adam","Bob"};
       JComboBox selectName;
       JCheckBox checkName[];
       public mycom2()
              {
               super("JComboBox and checkbox");
               selectName = new JComboBox(nameList);
               getContentPane().setLayout(new GridLayout(21,1));
               getContentPane().add(selectName);
               selectName.addActionListener(this);
              }
       public void actionPerformed(ActionEvent e)
              {

              }
       public static void main(String args[])
              {
               mycom2 mycomObj = new mycom2();
               mycomObj.setSize(400,400);
               mycomObj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               mycomObj.setVisible(true);
mycomObj.selectName.showPopup();
mycomObj.repaint();
              }
      }

 

[prosper]

yourJFrame.yourDialog.yourCombo.showPopup();
yourJFrame.repaint();
Please post your complete code if you can get it work.

 

[prosper]

Please post your complete code if you cannot get it work.