[Tkinter-discuss] Stopping a for loop with a sleep() funciton in it

[Alexnb]

Guilherme Polo wrote:
> 
> On Thu, Jul 10, 2008 at 7:31 PM, Alexnb <alexnbryan at gmail.com> wrote:
>>
>>
>>
>> Guilherme Polo wrote:
>>>
>>> On Thu, Jul 10, 2008 at 5:57 PM, Alexnb <alexnbryan at gmail.com> wrote:
>>>>
>>>> Okay, so I have a for loop with a sleep command. I want the loop to
>>>> continue
>>>> until it is told to stop. I want to tell it to stop when a list goes
>>>> from
>>>> empty to having something. The problem is that when that loop starts,
>>>> the
>>>> program pretty much stops with it.
>>>
>>> You need to remove the use of sleep and use "after" instead. You keep
>>> scheduling your task till the condition is not met anymore, then you
>>> stop scheduling it with "after".
>>>
>>>> To make things harder, I really want that
>>>> to be it's own class, so I have to pass it the list that triggers the
>>>> stopping, but I can only pass it the list once. So I don't think it is
>>>> possible.
>>>
>>> It is, just pass some other object along which can call the method
>>> "after".
>>>
>>>> But if this made sense to anyone, and you have a suggestion I
>>>> would love it. Heres the full code: (but at the bottom, the Open
>>>> function
>>>> is
>>>> really the only thing that matters)
>>>>
>>>
>>> If you want help based on code, you have to post a short-enough code
>>> that demonstrates the problem.
>>>
>>>> from Tkinter import *
>>>> import time
>>>>
>>>> class BusyBar(Frame):
>>>> ...
>>>
>>>
>>>
>>> --
>>> -- Guilherme H. Polo Goncalves
>>> _______________________________________________
>>> Tkinter-discuss mailing list
>>> Tkinter-discuss at python.org
>>> http://mail.python.org/mailman/listinfo/tkinter-discuss
>>>
>>>
>>
>> Okay, so I modified the bottom code to this:
>>
>> def Open(root):
>>
>>    bb = BusyBar(root, text='Grabbing Definitions')
>>    bb.pack(side=LEFT, expand=NO)
>>
>>
>>    def sleeper():
>>        root.update
> 
> What if you change this to root.update() ?
> 
>>        root.after(1, sleeper)
> 
> after works with milliseconds, not seconds, be aware.
> 
>>    bb.on()
>>    root.update_idletasks()
>>
>>    sleeper()
>>
>>    #for i in range(0, 100):
>>        #time.sleep(0.1)
>>        #root.update()
>>    bb.of()
>>
>> but it doesn't repeat. What am I missing?
>>
> 
> 
> -- 
> -- Guilherme H. Polo Goncalves
> _______________________________________________
> Tkinter-discuss mailing list
> Tkinter-discuss at python.org
> http://mail.python.org/mailman/listinfo/tkinter-discuss
> 
> 

Well, what was happening before is that the bar would just be at a
standstill. After making it update() it moved a little, but was just a
standstill at a different place, if that makes sense. Any more ideas? heres
the code:

def Open(root):

    bb = BusyBar(root, text='Grabbing Definitions')
    bb.pack(side=LEFT, expand=NO)
        
    bb.on()
    root.update_idletasks()
    
    def sleeper():
        root.update()
        root.after(1, sleeper)
        
    sleeper()

    #for i in range(0, 100):
        #time.sleep(0.1)
        #root.update()
    bb.of()

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