Mercurial > cpython-lru_cache-weakref

annotate Lib/lib-tk/tkFileDialog.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 20014716556b
children 5ff8bb25031c
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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 # tk common file dialogues
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6 #
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7 # this module provides interfaces to the native file dialogues
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8 # available in Tk 4.2 and newer, and the directory dialogue available
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9 # in Tk 8.3 and newer.
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10 #
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11 # written by Fredrik Lundh, May 1997.
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12 #
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13
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14 #
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15 # options (all have default values):
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16 #
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17 # - defaultextension: added to filename if not explicitly given
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18 #
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19 # - filetypes: sequence of (label, pattern) tuples. the same pattern
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20 # may occur with several patterns. use "*" as pattern to indicate
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21 # all files.
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22 #
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23 # - initialdir: initial directory. preserved by dialog instance.
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24 #
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25 # - initialfile: initial file (ignored by the open dialog). preserved
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26 # by dialog instance.
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27 #
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28 # - parent: which window to place the dialog on top of
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29 #
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30 # - title: dialog title
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31 #
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32 # options for the directory chooser:
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33 #
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34 # - initialdir, parent, title: see above
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35 #
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36 # - mustexist: if true, user must pick an existing directory
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37 #
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38
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39 from tkCommonDialog import Dialog
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40
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41 class _Dialog(Dialog):
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42
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43 def _fixoptions(self):
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44 try:
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45 # make sure "filetypes" is a tuple
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46 self.options["filetypes"] = tuple(self.options["filetypes"])
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47 except KeyError:
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48 pass
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49
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50 def _fixresult(self, widget, result):
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51 if result:
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52 # keep directory and filename until next time
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53 import os
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54 path, file = os.path.split(result)
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55 self.options["initialdir"] = path
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56 self.options["initialfile"] = file
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57 self.filename = result # compatibility
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58 return result
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59
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60
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61 #
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62 # file dialogs
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63
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64 class Open(_Dialog):
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65 "Ask for a filename to open"
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66
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67 command = "tk_getOpenFile"
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68
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69 class SaveAs(_Dialog):
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70 "Ask for a filename to save as"
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71
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72 command = "tk_getSaveFile"
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73
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74
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75 # the directory dialog has its own _fix routines.
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76 class Directory(Dialog):
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77 "Ask for a directory"
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78
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79 command = "tk_chooseDirectory"
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80
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81 def _fixresult(self, widget, result):
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82 if result:
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83 # keep directory until next time
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84 self.options["initialdir"] = result
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85 self.directory = result # compatibility
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86 return result
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87
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88 #
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89 # convenience stuff
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90
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91 def askopenfilename(**options):
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92 "Ask for a filename to open"
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93
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94 return Open(**options).show()
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95
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96 def asksaveasfilename(**options):
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97 "Ask for a filename to save as"
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98
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99 return SaveAs(**options).show()
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100
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101 # FIXME: are the following two perhaps a bit too convenient?
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102
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103 def askopenfile(mode = "r", **options):
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104 "Ask for a filename to open, and returned the opened file"
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105
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106 filename = Open(**options).show()
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107 if filename:
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108 return open(filename, mode)
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109 return None
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110
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111 def asksaveasfile(mode = "w", **options):
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112 "Ask for a filename to save as, and returned the opened file"
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113
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114 filename = SaveAs(**options).show()
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115 if filename:
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116 return open(filename, mode)
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117 return None
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118
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119 def askdirectory (**options):
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120 "Ask for a directory, and return the file name"
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121 return Directory(**options).show()
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122
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123 # --------------------------------------------------------------------
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124 # test stuff
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125
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126 if __name__ == "__main__":
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127
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128 print "open", askopenfilename(filetypes=[("all filez", "*")])
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129 print "saveas", asksaveasfilename()