Re: [Discuss-gnuradio] Performing callback function in GRC

[Florian Schlembach]

> Perhaps it would work better to treat the input as one variable. Use a
> tuple of numbers instead. You can make a text entry widget w/ converter
> type "Evaluate".
>
> The callback would probably look more like this:
> <callback>set_user_register(*\$user_reg_args)</callback>
>
> -josh

Thanks, thats already a good solution. However, I would like to select 
the user_reg_addr from another Checkbox Widget (e.g. to select a 
specific function). Assuming an evaluated $user_reg_args by 
[user_reg_addr,1], it always executes the callback on an update of 
user_reg_addr, which is obvious.
Thus, I always need to type in the value *and* the address into the text 
field. Although this would be acceptable, it wouldn't be so handy.

I am wondering if there is some sort of a conditional execution of the 
callback in the python-xml framework?