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#!/usr/bin/python
"""\
@file messageframe.py
@author Nat Goodspeed
@date 2013-01-03
@brief Define MessageFrame class for popping up messages from a command-line
script.
$LicenseInfo:firstyear=2013&license=viewerlgpl$
Copyright (c) 2013, Linden Research, Inc.
$/LicenseInfo$
"""
import Tkinter as tk
import os
# Tricky way to obtain the filename of the main script (default title string)
import __main__
# This class is intended for displaying messages from a command-line script.
# Getting the base class right took a bit of trial and error.
# If you derive from tk.Frame, the destroy() method doesn't actually close it.
# If you derive from tk.Toplevel, it pops up a separate Tk frame too. destroy()
# closes this frame, but not that one.
# Deriving from tk.Tk appears to do the right thing.
class MessageFrame(tk.Tk):
def __init__(self, text="", title=os.path.splitext(os.path.basename(__main__.__file__))[0],
width=320, height=120):
tk.Tk.__init__(self)
self.grid()
self.title(title)
self.var = tk.StringVar()
self.var.set(text)
self.msg = tk.Label(self, textvariable=self.var)
self.msg.grid()
# from http://stackoverflow.com/questions/3352918/how-to-center-a-window-on-the-screen-in-tkinter :
self.update_idletasks()
# The constants below are to adjust for typical overhead from the
# frame borders.
xp = (self.winfo_screenwidth() / 2) - (width / 2) - 8
yp = (self.winfo_screenheight() / 2) - (height / 2) - 20
self.geometry('{0}x{1}+{2}+{3}'.format(width, height, xp, yp))
self.update()
def set(self, text):
self.var.set(text)
self.update()
if __name__ == "__main__":
# When run as a script, just test the MessageFrame.
import sys
import time
frame = MessageFrame("something in the way she moves....")
time.sleep(3)
frame.set("smaller")
time.sleep(3)
frame.set("""this has
several
lines""")
time.sleep(3)
frame.destroy()
print "Destroyed!"
sys.stdout.flush()
time.sleep(3)
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