tkSimpleDialog focus problem

[John Lull]

I'm trying to write a very simple app using Tkinter, and have gotten
as far as showing a simple dialog box derived from tkSimpleDialog, as
shown in listing 1 below.  The dialog box looks as I expected,
except....

When I run this (under Win98), it displays the main window on *top* of
the dialog box, even though the dialog box has the focus.  I can type
into the edit field, even when it's obscured behind the main window.
If I <alt<tab>> to the program, the main window seems to get the
focus, but now moves *behind* the dialog box.  I can click on the
dialog box title bar & bring it to the front, and have it retain or
get the focus.

Clearly, I'm doing something wrong.  Any hints?

Regards,
John


Listing 1:
# file test.py

from Tkinter import *
import tkSimpleDialog

# ===================================================================
class TestDialog(tkSimpleDialog.Dialog):
   # ----------------------------------------------------------------
   def body(self, master):

      # Add label + entry field
      Label(master, text="A").grid(row=0)
      e = Entry(master)
      e.insert(0, 1)
      e.grid(row=0, column=1, sticky=E+W)

      # Set initial focus to entry field
      return e

# ===================================================================
def t():
   m=Tk()
   d=TestDialog(m, "testing, testing...")
   print d.result

t()