cpython/Lib/tkinter/commondialog.py

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# base class for tk common dialogues
#
# this module provides a base class for accessing the common
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# dialogues available in Tk 4.2 and newer. use filedialog,
# colorchooser, and messagebox to access the individual
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# dialogs.
#
# written by Fredrik Lundh, May 1997
#
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from tkinter import *
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class Dialog:
command = None
def __init__(self, master=None, **options):
# FIXME: should this be placed on the module level instead?
if TkVersion < 4.2:
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raise TclError("this module requires Tk 4.2 or newer")
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self.master = master
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self.options = options
if not master and options.get('parent'):
self.master = options['parent']
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def _fixoptions(self):
pass # hook
def _fixresult(self, widget, result):
return result # hook
def show(self, **options):
# update instance options
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for k, v in options.items():
self.options[k] = v
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self._fixoptions()
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# we need a dummy widget to properly process the options
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# (at least as long as we use Tkinter 1.63)
w = Frame(self.master)
try:
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s = w.tk.call(self.command, *w._options(self.options))
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s = self._fixresult(w, s)
finally:
try:
# get rid of the widget
w.destroy()
except:
pass
return s