Re: A really basic drawing question

On Oct 31, 2020, at 6:45 PM, Phil <[email protected]> wrote:
> 
> Thank you for reading this.
> 
> It's been awhile since I've done anything useful with wxPython and I find that I now cannot get past a very basic concept.
> 
> I want to call Fill_board() but even though the function is called it's not drawing anything, just a blank window is displayed. It must have something to do with a drawing context.

The problem is timing.  You are trying to do drawing during __init__, but your window does not actually exist until (relatively) long after __init__ finishes.  Remember that these systems are all event driven.  Your __init__ call creates window data structures in memory, but nothing gets drawn on the screen until __init__ returns and the main code is able to queue up a “paint” request.  It can’t do any drawing until the sizers get a change to adjust everything, and that only happens when everybody is initialized.

So, you can call Fill_board the way you describe, but you must do it in response to a window message, and __init__ is not a window message.
— 
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.

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