Idle thread (Polling) python GUI and saving program state
Rolando
abhishek1899 at gmail.com
Mon Mar 3 21:41:54 EST 2014
On Monday, March 3, 2014 6:06:22 PM UTC-8, MRAB wrote:
> On 2014-03-04 01:33, Rolando wrote:
>
> > I have a GUI with a bunch of cells which is my "View" in the MVC
>
> > design. The user enters some information in the view and I pass this
>
> > on to the model so that using the information entered by the user
>
> > it(model) can do some processing.
>
> >
>
> > I have coded up my model as a state machine. Wherein, once a function
>
> > is complete it switches to the next state and so on.
>
> >
>
> > I want to know how do I save the program state between restarts.
>
> > Basically, I'm trying to handle a scenario wherein if someone closes
>
> > the program. The next time someone starts it up, it should start from
>
> > where it left off (both the view and model)
>
> >
>
> When the user closes the window (you don't say what you're using for
>
> the GUI, but there should be a way of detecting when window closes),
>
> save the necessary info to a file using, say, the 'json' module. You
>
> can then reload the info from the file when the program is restarted.
>
>
>
> > Also, I want to setup a poll method where once in a while I can poll
>
> > each cell to know the state it is in. How do I do this? I don't want
>
> > my GUI to hang when I'm doing anything. It will be great if someone
>
> > could help. Thanks!
>
> >
>
> Can the model run continuously? If so, you should run it in its own
>
> (background) thread and the GUI in the main thread and communicate
>
> with the model's thread via, say, a queue (for that use the 'queue'
>
> module).
I'm using wxPython for my GUI. I have tried running the model thread in the background. But how will I save the state if the whole model is running on a thread? When the program is restarted I want the program to continue from the same state where it left off for each cell. I was thinking of having an idle thread that calls a poll method which polls all the cells and checks what each one is doing. But, I don't know how to do that. I'm confused.
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