Locating a JDialog in a JApplet

Question

My applet displays a JDialog object but, I can't locate the dialog at the center of the applet. Here is what I do:
// this is call from the applet.
MyDialog dialog = new MyDialog(this);
// this is the constructor for my dialog
MyDialog(JApplet owner) {
  super(owner,"Hello...",true);  // the compiler doesn't accept a JApplet, a Component nor any other type of object I try.
}I have also tried to call the dialogs setLocation() method. The trouble here is that I can't find the center of the applet. I hope you can point my nose in the right direction.
Thanks.

Answer 1

If you pass the Applet as the parent, you will find a problem with your Dialog if you bring up another application window over the browser window while the Dialog is visible: on refocusing the browser window, the Dialog will still have the focus but will be hidden behind the browser window.
Use the following to get a Frame for a Dialog. This prevents the above from happening and ensure the Dialog will always be centred over the applet:
     public Frame getDialogFrame()
          /* CREATES AND POSITIONS A FRAME USED BY DIALOGS
             TO ENSURE THAT DIALOG MODAL AND CENTRED OVER APPLET*/
          Object parent = this.getParent();
          while(!(parent instanceof Frame)) parent=((Component)parent).getParent();
          Frame dialogFrame = (Frame) parent;
          Point p = this.getLocationOnScreen();
          dialogFrame.setLocation(p.x, p.y);
          return dialogFrame;
     }