[Tkinter-discuss] How to automatically run some code upon GUI startup?

[Snakey]

snakey wrote:
> 
> Hi Fredrik,
> Thanks for the suggestion.  Let me try it now.  I guess I need a deeper
> understanding of this mainloop() thing.  I am still unclear about how the
> whole GUI concept of mainloop() works.
> 




Fredrik Lundh wrote:
> 
> Snakey wrote:
> 
>> I have created a simple Tkinter GUI.  I have a function that needs to be
>> executed automatically upon launching the GUI application.  How can it be
>> done?
> 
> how about calling it from the script that creates the GUI, before you 
> enter the mainloop?
> 
>      my_function()
>      root.mainloop()
> 
> if you want to call it when the GUI is up and running, you can use the
> "wait_visibility" method on the root widget:
> 
>      root.wait_visibility() # run event loop until window appears
>      my_function()
>      root.mainloop()
> 
> another approach is to use the "after_idle" method:
> 
>      root.after_idle(my_function)
>      root.mainloop()
> 
> </F>
> 
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> 
> 

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