[Tkinter-discuss] Fwd: WxPython -> Tkinter

Guilherme Polo ggpolo at gmail.com
Wed Oct 29 14:55:59 CET 2008


On 10/29/08, Olrik Lenstra <o.lenstra at gmail.com> wrote:
> I see, Thanks a lot, I really don't wish to bother you any further, but
> here's my current situation.
> I am still a beginning programmer and I am not entirely sure where to put
> this code exactly.
>
> How would I go about using this code?
>

It should be very similar to what you are already doing in wx.

But, you would need to layout your toplevel (the one that is created
when you call Tkinter.Tk()) as this:

There would be a ttk.Frame that would hold all the other widgets,
which should be all ttk widgets according to this sample. Then you
would call safe_yield(frame, True) in the same situations you would in
wx. Now it remains to check if there is the same need for this in tk
as there is in wx.

Finally, a sample way to layout the widgets:

root = Tkinter.Tk()
frame = ttk.Frame(root)
btn1 = ttk.Button(frame, text="Button 1")
...
... some time later:
safe_yield(frame, True)
...

> Thank you so much in advance.
> Regards,
> Olrik
>
>  2008/10/29 Guilherme Polo <ggpolo at gmail.com>
>
> >
> >
> >
> > ---------- Forwarded message ----------
> > From: Guilherme Polo <ggpolo at gmail.com>
> > Date: Oct 29, 2008 9:16 AM
> > Subject: Re: [Tkinter-discuss] WxPython -> Tkinter
> > To: Olrik Lenstra <o.lenstra at gmail.com>
> > Cc: python-list at python.org
> >
> >
> > On 10/29/08, Olrik Lenstra <o.lenstra at gmail.com> wrote:
> >  > Hello everyone,
> >  >
> >  > A while ago I joined the Tutor mailing list, and they helped me out
> with a
> >  > question regarding wxPython.
> >  > Now however, I have tried a program in Tkinter and I would like to see
> if
> >  > there is a similar command to "wx.SafeYield(self, True)".
> >
> >
> > It will be a combination of commands, not a single one. Initially I
> >  considered this as "probably without solution", since tcl acquired a
> >  yield command just in the 8.6a3 release, but then I looked at
> >  wx.SafeYield code and apparently it is possible to replicate it.
> >
> >  Here is an initial cut, it is very possible to contain something not
> >  equivalent to wx.SafeYield (besides it could be improved):
> >
> >
> >  import ttk
> >
> >  inside_tkyield = False
> >  disabled_wins = {}
> >
> >  def safe_yield(window, only_if_needed=False):
> >    window_disabler(window)
> >
> >    try:
> >        return tk_yield(window, only_if_needed)
> >    finally:
> >        for widget, flags in disabled_wins.iteritems():
> >            ttk.Widget.state(widget, flags)
> >        disabled_wins.clear()
> >
> >
> >  def window_disabler(window):
> >    widgets = window.children.values()
> >    widgets.append(window)
> >
> >    for widget in widgets:
> >        if widget.instate(['!disabled']):
> >            prev_flags = widget.state(['disabled'])
> >            disabled_wins[widget] = prev_flags
> >
> >
> >  def tk_yield(window, only_if_needed=False):
> >    # wx implements this differently based on the backend it is using
> >    global inside_tkyield
> >    if inside_tkyield:
> >        if not only_if_needed:
> >            raise RuntimeError("safe_yield called recursively")
> >
> >        return False
> >
> >    inside_tkyield = True;
> >
> >    window.update()
> >    window.update_idletasks()
> >
> >    inside_tkyield = False;
> >
> >    return True
> >
> >
> >  Note that this depends on ttk widgets
> >  (http://pypi.python.org/pypi/pyttk) since it uses
> widget.state to
> >  disable and reenable the widgets. On windows the "wm" command supports
> >  disabling the entire window, so it is easier if you can use it.
> >
> > [Forwarded because I sent to the wrong list first time]
> >
> >
> >  >  Below is a copy of the message to the tutor list.
> >  >
> >  > > Dear Mailing list,
> >  > >
> >  > > a while ago a few of you helped me solve an issue I had with a GUI /
> scan
> >  > > program that I made.
> >  > > The problem was that when I tried to move the frame it would hang
> until
> >  > the
> >  > > scan was finished.
> >  > > To solve this I had to add "wx.SafeYield(self, True)" to the scan and
> the
> >  > > GUI wouldn't hang any more.
> >  > > Now I have redone the program and have written it with Tkinter
> instead of
> >  > > WxPython.
> >  > >
> >  > > So is there a similar command for Tkinter as there is for WxPython?
> >  > >
> >  > > Thanks in advance.
> >  > > Regards,
> >  > > Olrik
> >  > >
> >  >
> >
> > > _______________________________________________
> >  >  Tkinter-discuss mailing list
> >  >  Tkinter-discuss at python.org
> >  >
> http://mail.python.org/mailman/listinfo/tkinter-discuss
> >  >
> >  >
> >
> >
> >
> >  --
> >  -- Guilherme H. Polo Goncalves
> >
> >
> > --
> > -- Guilherme H. Polo Goncalves
> >
> >
> >
> > _______________________________________________
> > Tkinter-discuss mailing list
> > Tkinter-discuss at python.org
> >
> http://mail.python.org/mailman/listinfo/tkinter-discuss
> >
>
>


-- 
-- Guilherme H. Polo Goncalves


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