[Tkinter-discuss] Fwd: WxPython -> Tkinter

[Olrik Lenstra]

Hmm, The program worked and no error messages popped up but the GUI
still hung when I tried running the scan.
Maybe this is a help:

The program is a program that does a couple of scans like ipconfig / dxdiag etc.
While the scan is running the GUI has a status bar in which the text
changes when the scan is running a new part of the scan.
like: "TSO is now making an ipconfig log"

Thanks again! :)
Regards,
Olrik

2008/11/2 Guilherme Polo <ggpolo at gmail.com>:
> On Sun, Nov 2, 2008 at 2:40 PM, Guilherme Polo <ggpolo at gmail.com> wrote:
>> On Sun, Nov 2, 2008 at 12:34 PM, Olrik Lenstra <o.lenstra at gmail.com> wrote:
>>> I would like to thank you already for all the help you've given me, it
>>> is really appreciated :)
>>
>> You are welcome.
>>
>>> I decided to update to Python2.6 instead of using the tile pack. My
>>> application now shows the GUI again.
>>> So I added the code you gave me to prevent the window from hanging
>>> once I execute my scan.
>>> I get the following Traceback:
>>>
>>> D:\Documents\OLPrograms\TroubleShooting Olrik\sourcecode\TSO(source)>python TSO.
>>> pyw
>>> Exception in Tkinter callback
>>> Traceback (most recent call last):
>>>  File "D:\Python26\lib\lib-tk\Tkinter.py", line 1410, in __call__
>>>    return self.func(*args)
>>>  File "D:\Documents\OLPrograms\TroubleShooting Olrik\sourcecode\TSO(source)\TSO
>>> main.pyw", line 29, in OnScan
>>>    TSOscn.Scan(root, status)
>>>  File "D:\Documents\OLPrograms\TroubleShooting Olrik\sourcecode\TSO(source)\TSO
>>> scn.pyw", line 23, in Scan
>>>    TSOex.safe_yield(Frame, True)
>>>  File "D:\Documents\OLPrograms\TroubleShooting Olrik\sourcecode\TSO(source)\TSO
>>> ex.pyw", line 75, in safe_yield
>>>    window_disabler(window)
>>>  File "D:\Documents\OLPrograms\TroubleShooting Olrik\sourcecode\TSO(source)\TSO
>>> ex.pyw", line 90, in window_disabler
>>>    if widget.instate(['!disabled']):
>>> AttributeError: Button instance has no attribute 'instate'
>>>
>>
>> That is because Button is not a ttk.Button, but a "normal"
>> Tkinter.Button. I didn't know before you would be using windows, but
>> since this is the case, you may try substituting the use of instate
>> and state calls (that are available only for ttk widgets) by the use
>> of widget.wm_attributes('-disabled', 1),
>> widget.wm_attributes('-disabled', 0) and
>> widget.wm_attributes('-disabled'). I will be able to test it here
>> later since my new pc arrived with a windows vista.
>>
>
> I have changed it a bit now, please retry with this one:
>
> import sys
>
> inside_tkyield = False
> disabled_wins = {}
> platform_win = 'win' in sys.platform
> if not platform_win:
>    import ttk
>
> def safe_yield(window, only_if_needed=False):
>    window_disabler(window)
>    try:
>        return tk_yield(window, only_if_needed)
>    finally:
>        window_enabler(window)
>
>
> def window_enabler(window):
>    for widget, flags in disabled_wins.iteritems():
>        if platform_win:
>            window.wm_attributes('-disabled', 0)
>        else:
>            ttk.Widget.state(widget, flags)
>    disabled_wins.clear()
>
>
> def window_disabler(window):
>    if platform_win and not int(window.wm_attributes('-disabled')):
>        window.wm_attributes('-disabled', 1)
>        disabled_wins[window] = 1
>        return
>
>    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
>
> It should work under windows, but it is not very nice elsewhere right
> now unfortunately.
>
>>> D:\Documents\OLPrograms\TroubleShooting Olrik\sourcecode\TSO(source)>
>>>
>>> I don't know if it makes a difference, But I think you should know
>>> that I use different files that import other applications (made by me)
>>> Example:
>>>
>>> TSO.pyw is the main script, this looks if the very first argument is
>>> "TSO.pyw", if it is, run "TSOmain.TSO()"
>>> TSOmain.pyw is the GUI and the GUI only, from there it calls other files etc.
>>> I hope that wasn't too confusing.
>>>
>>> Thanks again, I really appreciate it.
>>>
>>> Regards,
>>> Olrik
>>>
>
>
> --
> -- Guilherme H. Polo Goncalves
>