[Tutor] how can a value be retrieved from an event loop?

[Phil]

On 16/11/23 21:13, Alan Gauld wrote:de this is what I have done:
> I'm slight confused by your terminology here.
> A class is a template from which you create instances.
> Instances present an API to which you can send "messages"
> (aka call functions) Those functions are implemented
> in the class definition but each instance offers them
> independently.
>
> So I don't really understand what you mean by the class
> returns values to the instance app? The class creates
> an instance. The instances should return values.

It's getting late and time for bed. Forget what I said about the class 
returning anything.

What I'm trying to do is create a knob that works in the same fashion as 
the scale widget.

I think I'm correct in saying that the scale is a class, or part of a 
widget class, and to use it I import scale (tk.Tk) into an app class. 
The scale's value is then available to be feed into a label, for instance.

It seemed simple enough to create a knob class but I'm missing 
something. I just want to replace the scale with a knob.

-- 
Regards,
Phil