Lib/lib-tk/tkColorChooser.py

   1 #
   2 # Instant Python
   3 # $Id$
   4 #
   5 # tk common colour chooser dialogue
   6 #
   7 # this module provides an interface to the native color dialogue
   8 # available in Tk 4.2 and newer.
   9 #
  10 # written by Fredrik Lundh, May 1997
  11 #
  12 # fixed initialcolor handling in August 1998
  13 #
  14
  15 #
  16 # options (all have default values):
  17 #
  18 # - initialcolor: colour to mark as selected when dialog is displayed
  19 #   (given as an RGB triplet or a Tk color string)
  20 #
  21 # - parent: which window to place the dialog on top of
  22 #
  23 # - title: dialog title
  24 #
  25
  26 from tkCommonDialog import Dialog
  27
  28
  29 #
  30 # color chooser class
  31
  32 class Chooser(Dialog):
  33     "Ask for a color"
  34
  35     command = "tk_chooseColor"
  36
  37     def _fixoptions(self):
  38         try:
  39             # make sure initialcolor is a tk color string
  40             color = self.options["initialcolor"]
  41             if type(color) == type(()):
  42                 # assume an RGB triplet
  43                 self.options["initialcolor"] = "#%02x%02x%02x" % color
  44         except KeyError:
  45             pass
  46
  47     def _fixresult(self, widget, result):
  48         # to simplify application code, the color chooser returns
  49         # an RGB tuple together with the Tk color string
  50         if not result:
  51             return None, None # cancelled
  52         r, g, b = widget.winfo_rgb(result)
  53         return (r/256, g/256, b/256), result
  54
  55
  56 #
  57 # convenience stuff
  58
  59 def askcolor(color = None, **options):
  60     "Ask for a color"
  61
  62     if color:
  63         options = options.copy()
  64         options["initialcolor"] = color
  65
  66     return apply(Chooser, (), options).show()
  67
  68
  69 # --------------------------------------------------------------------
  70 # test stuff
  71
  72 if __name__ == "__main__":
  73
  74     print "color", askcolor()