[Tutor] Passing arguments

[Reggie Dugard]

Edmund,

You have the right idea about passing a reference to the progressMeter
method to the Calc class instance, either in its constructor or when you
call the method that does the calculation.  For example

gui = GUI(...)
c = Calc(...)

c.do_loop(..., gui.updateProgress)

and in the do_loop method:

def do_loop(self, ..., progress=None):
    ...
    while calculate:
        ...
        if progress:
            percent_done = ...
	    progress(percent_done)


Hopefully this will put you on the right track.


On Wed, 2003-07-02 at 09:14, DORSEY_EDMUND_K@LILLY.COM wrote:
> I have a class called GUI which draws my GUI.  I then have another
> class called Calc which does all the calculations.
> 
> One of the GUI objects I'm using is a progressMeter (pmw) 
> 
> The progressMeter is declared in GUI and it has an update function
> called updateProgress.  So you can have a loop and keep calling
> updateProgress and increment your progress.
> This works fine and dandy if I call updateProgress in the GUI class.
> The problem is I can't monitor the progress in the GUI class because
> the calculation is being done in the Calc class.
> 
> Ideally, I want to called updateProgress in the loop of Calc Class.
> 
> I thought for a second since python passes stuff by reference I could
> just pass a reference to the progressMeter to Calc and then do the
> update there but that doesn't work.
> 
> Do I need to make the progressMeter global?  I read that's not very
> elegant.
> 
> How would I go about letting the Calc class update progressMeter.
> Thank you for your help.
> 
> ~Ed
-- 
Reggie