[Tkinter-discuss] (no subject)

[Alex Ter-Sarkissov]

thanks guys, I didn't realize that setting textvariable = varname explicitly
delegates the value to this variable. In MATLAB things work differently.

cheers,

Alex

2010/10/28 Lion Kimbro <lionkimbro at gmail.com>

>
>   Alex, does this answer what you're trying to do?
>
> >>> import tkinter
> >>> top = tkinter.Tk()
> >>> intvar = tkinter.IntVar()
> >>> entry = tkinter.Entry(top, width=10, textvariable=intvar)
> >>> entry.grid()
> >>> intvar.get()
> 0
> >>> # now I set it to 10 in the user interface...
> ...
> >>> intvar.get()
> 10
> >>>
>
>   I found the names of the variables pretty confusing;
>   When I used "intvar" and "entry", it was much clearer to me.
>
>   You wrote "#need to get the textvariable value from Entry popsize, not
> variable PopSize!"
>
>   ...but I thought you were trying to get the widget's property?
>
>   When you set the value with "textvariable=intvar", the widget is now
> explicitly delegating the value to intvar.
>   That is, the IntVar becomes the authority for the information.
>
>
>
> On Wed, Oct 27, 2010 at 4:39 AM, Alex Ter-Sarkissov <
> sigma.z.1980 at gmail.com> wrote:
>
>> hi, here's my problem:
>>
>> let's say I have a function that uses some widget's property. How canI
>> retireve the value of this property?
>>
>> For example,
>>
>> PopSize=IntVar();
>>
>> popsize=Entry(root,width=10,textvariable=PopSize)
>>
>> def rand_opo_gen (self,event):
>>       popsize_start=#need to get the textvariable value from Entry
>> popsize, not variable PopSize!
>>       pop1=random.random(popsize_start*2)
>>
>> Another option, of course, is that the variable PopSize acquires the
>> value from Entry, but I can't see how to do it either
>>
>> cheers,
>> alex
>> _______________________________________________
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>> Tkinter-discuss at python.org
>> http://mail.python.org/mailman/listinfo/tkinter-discuss
>>
>>
>
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