Ok, reading your code examples again...

  my_function( (bool)(o->mvalue()->value()) );

This will work only - at least I think, without testing - if the user 
picked the menu item with the mouse. If you call do_callback() from the 
Menu_Item directly the parent Fl_Menu_ is not notified to adjust 
picked() and mvalue().

The Fl_Menu_Item.H code uses do_callback() in a straight forward way: it 
just calls your defined callback with the provided widget and the 
user_data as arguments.

The Fl_Menu_* you have to provide is the pointer to the menu in which 
you have defined your Menu_Item so that it finds the static callback, in 
your case by looking up  ((Controls*)(o->parent()->user_data())), where 
the pointer to the instance of the Fl_Menu_ class is stored.

Just give the menu (probably Fl_Menu_Bar) a name in fluid and use this 
as an argument.

I hope this helps.

Cheers, Herman



On 10/15/2012 02:11 PM, vigmond.ucalgary wrote:
> I already looked there so I will keep on asking.
>
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