Lib/lib-tk/tkCommonDialog.py

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