Mercurial > cpython-lru_cache-weakref

annotate Lib/lib-tk/tkFileDialog.py @ 25755:6d35d4292dec legacy-trunk

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Patch #621891: Add askopenfile{name}s.
author Martin v. Löwis <martin@v.loewis.de>
date Sun, 13 Oct 2002 10:28:04 +0000
parents 289ea1d5c5ac
children ef531482bb37
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 # - multiple: if true user may select more than one file
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33 #
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34 # options for the directory chooser:
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35 #
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36 # - initialdir, parent, title: see above
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37 #
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38 # - mustexist: if true, user must pick an existing directory
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39 #
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40 #
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41
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42
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43 from tkCommonDialog import Dialog
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44
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45 class _Dialog(Dialog):
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46
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47 def _fixoptions(self):
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48 try:
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49 # make sure "filetypes" is a tuple
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50 self.options["filetypes"] = tuple(self.options["filetypes"])
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51 except KeyError:
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52 pass
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53
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54 def _fixresult(self, widget, result):
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55 if result:
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56 # keep directory and filename until next time
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57 import os
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58 path, file = os.path.split(result)
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59 self.options["initialdir"] = path
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60 self.options["initialfile"] = file
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61 self.filename = result # compatibility
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62 return result
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63
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64
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65 #
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66 # file dialogs
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67
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68 class Open(_Dialog):
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69 "Ask for a filename to open"
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70
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71 command = "tk_getOpenFile"
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72
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73 class SaveAs(_Dialog):
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74 "Ask for a filename to save as"
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75
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76 command = "tk_getSaveFile"
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77
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78
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79 # the directory dialog has its own _fix routines.
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80 class Directory(Dialog):
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81 "Ask for a directory"
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82
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83 command = "tk_chooseDirectory"
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84
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85 def _fixresult(self, widget, result):
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86 if result:
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87 # keep directory until next time
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88 self.options["initialdir"] = result
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89 self.directory = result # compatibility
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90 return result
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91
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92 #
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93 # convenience stuff
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94
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95 def askopenfilename(**options):
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96 "Ask for a filename to open"
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97
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98 return Open(**options).show()
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99
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100 def asksaveasfilename(**options):
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101 "Ask for a filename to save as"
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102
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103 return SaveAs(**options).show()
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104
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105 def askopenfilenames(**options):
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106 """Ask for multiple filenames to open
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107
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108 Returns a list of filenames or empty list if
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109 cancel button selected
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110 """
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111 options["multiple"]=1
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112 files=Open(**options).show()
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113 return files.split()
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114
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115
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116 # FIXME: are the following perhaps a bit too convenient?
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117
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118 def askopenfile(mode = "r", **options):
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119 "Ask for a filename to open, and returned the opened file"
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120
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121 filename = Open(**options).show()
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122 if filename:
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123 return open(filename, mode)
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124 return None
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125
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126 def askopenfiles(mode = "r", **options):
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127 """Ask for multiple filenames and return the open file
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128 objects
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129
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130 returns a list of open file objects or an empty list if
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131 cancel selected
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132 """
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133
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134 files = askopenfilenames(**options)
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135 if files:
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136 ofiles=[]
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137 for filename in files:
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138 ofiles.append(open(filename, mode))
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139 files=ofiles
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140 return files
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141
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142
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143 def asksaveasfile(mode = "w", **options):
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144 "Ask for a filename to save as, and returned the opened file"
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145
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146 filename = SaveAs(**options).show()
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147 if filename:
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148 return open(filename, mode)
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149 return None
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150
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151 def askdirectory (**options):
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152 "Ask for a directory, and return the file name"
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153 return Directory(**options).show()
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154
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155 # --------------------------------------------------------------------
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156 # test stuff
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157
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158 if __name__ == "__main__":
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159 # Since the file name may contain non-ASCII characters, we need
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160 # to find an encoding that likely supports the file name, and
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161 # displays correctly on the terminal.
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162
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163 # Start off with UTF-8
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164 enc = "utf-8"
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165 import sys
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166
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167 # See whether CODESET is defined
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168 try:
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169 import locale
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170 locale.setlocale(locale.LC_ALL,'')
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171 enc = locale.nl_langinfo(locale.CODESET)
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172 except (ImportError, AttributeError):
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173 pass
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174
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175 # dialog for openening files
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176
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177 openfilename=askopenfilename(filetypes=[("all files", "*")])
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178 try:
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179 fp=open(openfilename,"r")
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180 fp.close()
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181 except:
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182 print "Could not open File: "
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183 print sys.exc_info()[1]
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184
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185 print "open", openfilename.encode(enc)
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186
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187 # dialog for saving files
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188
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189 saveasfilename=asksaveasfilename()
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190 print "saveas", saveasfilename.encode(enc)
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191