[Python-bugs-list] Re: Tkinter wm_colormapwindows doesn't work w/o breaking Tkinter encapsulation (PR#107)

[aa8vb@yahoo.com]

Guido van Rossum:
 |Randall Hopper:
 |> In Tcl/Tk you can say:
 |> 
 |>    wm colormapwindows . {.frame.label .frame}
 |> 
 |> In Tkinter, one would think you could use:
 |> 
 |>    
 |> but this results in an error:
 |> 
 |>    TclError: wrong # arguments: must be "wm colormapwindows window
 |> ?windowList?"
 |> 
 |> this is what is sent to Tk:
 |>    ('wm', 'colormapwindows', '.269680944', 
 |>     <Tkinter.Label instance at 101302e0>, 
 |>     <Tkinter.Frame instance at 10130280>)
 |> 
 |> As a workaround, the following works (or at least Tk doesn't complain
 |> about it) but is obviously a hack:
 |> 
 |>   main.tk.call( "wm", "colormapwindows", main._w,
 |>                 '%s %s' % ( canvas._w, frame._w ) )
 |
 |The Python function doesn't require you to put the windows in a list.
 |Instead, it takes any number of windows as separate arguments.
 |This should work:
 |
 |    main.wm_colormapwindows(label, frame)

On Python 1.52, this yields:

------------------------------------------------------------------------------
Traceback (innermost last):
  File "./3-tk_win.py", line 106, in ?
    main.wm_colormapwindows( label, frame )
  File "/home/rhh/software/IRIX-o32/python-1.5.2/lib/python1.5/lib-tk/Tkinter.py", line 785, in wm_colormapwindows
    return map(self._nametowidget, self.tk.call(args))
TclError: wrong # arguments: must be "wm colormapwindows window ?windowList?"
------------------------------------------------------------------------------

I inserted a print of args into wm_colormapwindows:

------------------------------------------------------------------------------
        def wm_colormapwindows(self, *wlist):
                args = ('wm', 'colormapwindows', self._w) + _flatten(wlist)
 ->             print args
                return map(self._nametowidget, self.tk.call(args))
------------------------------------------------------------------------------

and this is what is being passed to self.tk.call:

------------------------------------------------------------------------------
('wm', 'colormapwindows', '.', <Tkinter.Label instance at 10120d58>, <Tkinter.Frame instance at 10120b58>)
------------------------------------------------------------------------------

From first glance, it appears there may be two problems: 

     1) the Tkinter objects aren't being translated to Tk widget names 
        (label._w, frame._w), and 
     2) The window list isn't being passed to Tk as a Tk list 
        (i.e. one arg to tk.call)

Together, I believe this is why the following raw Tk call doesn't complain:

------------------------------------------------------------------------------
 |>   main.tk.call( "wm", "colormapwindows", main._w,
 |>                 '%s %s' % ( label._w, frame._w ) )
------------------------------------------------------------------------------

Thanks,

Randall