[GRASSGUI] Re: python question - waiting for a variable to change

[Daniel Calvelo]

You could make your callback function (the one you wish executed as
the value is returned) a parameter to __init__ in menuform, that is
called from within menuform.onRun if set to stg else than None. I
think that is what you call a hook.

You have to build something quite involved to have signaling objects
behave like normal variables, AFAICT.

Daniel.

On 3/19/07, Michael Barton <michael.barton at asu.edu> wrote:
>
>  I've run into a little problem that is taxing my neophyte Python
> programming abilities. However we do a popup panel for setting display layer
> options, I think it is necessary to do something along the lines of the
> following....
>
>  1. Start the options popup. This is currently done with a double click on
> the layer, which calls the onActivate even handler. For a raster, the event
> handler uses...
>          drastcmd = menuform.GUI().parseCommand('d.rast', gmpath)
>      ...to start the autogenerated GUI.
>
>  2. When you press the "run" button for this d.* command, the assembled
> command (d.rast + options) is simply returned.
>
>  3. Now drastcmd should contain a complete d.rast command string.
>
>  So, how do I wait in onActivate until the "run" button is pressed on the
> popup and the information is returned to drastcmd (i.e., the value of
> drastcmd is changed). Or, alternatively, how can a change in the value of
> drastcmd generate an event that I can capture and process? I messed around
> with wait() (thinking about tk_wait in TclTk), but couldn't get it to do
> what I wanted.
>
>
>  Michael
>  __________________________________________
>  Michael Barton, Professor of Anthropology
>  School of Human Evolution & Social Change
>  Center for Social Dynamics & Complexity
>  Arizona State University
>
>  phone: 480-965-6213
>  fax: 480-965-7671
>  www: http://www.public.asu.edu/~cmbarton
>
>


-- 
-- Daniel Calvelo Aros