Mercurial > cpython-lru_cache-weakref

annotate Lib/lib-tk/tkCommonDialog.py @ 25838:8540887bcec6 2.2

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Backport of 2.183: Fix memory leak in add_subclass() found by NealN with valgrind.
author Guido van Rossum <guido@python.org>
date Fri, 18 Oct 2002 13:42:21 +0000
parents 847ae40074d4
children c5d3e458749e
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1 #
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2 # Instant Python
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3 # $Id$
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4 #
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5 # base class for tk common dialogues
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6 #
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7 # this module provides a base class for accessing the common
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8 # dialogues available in Tk 4.2 and newer. use tkFileDialog,
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9 # tkColorChooser, and tkMessageBox to access the individual
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10 # dialogs.
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11 #
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12 # written by Fredrik Lundh, May 1997
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13 #
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14
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15 from Tkinter import *
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16 import os
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17
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18 class Dialog:
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19
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20 command = None
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21
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22 def __init__(self, master=None, **options):
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23
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24 # FIXME: should this be placed on the module level instead?
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25 if TkVersion < 4.2:
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26 raise TclError, "this module requires Tk 4.2 or newer"
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27
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28 self.master = master
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29 self.options = options
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30 if not master and options.get('parent'):
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31 self.master = options['parent']
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32
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33 def _fixoptions(self):
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34 pass # hook
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35
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36 def _fixresult(self, widget, result):
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37 return result # hook
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38
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39 def show(self, **options):
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40
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41 # update instance options
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42 for k, v in options.items():
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43 self.options[k] = v
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44
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45 self._fixoptions()
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46
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47 # we need a dummy widget to properly process the options
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48 # (at least as long as we use Tkinter 1.63)
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49 w = Frame(self.master)
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50
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51 try:
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52
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53 s = apply(w.tk.call, (self.command,) + w._options(self.options))
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54
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55 s = self._fixresult(w, s)
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56
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57 finally:
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58
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59 try:
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60 # get rid of the widget
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61 w.destroy()
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62 except:
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63 pass
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64
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65 return s