[opensource-dev] I could use a little help with boost and callbacks and stuff

Lance Corrimal Lance.Corrimal at eregion.de
Sat Nov 12 23:51:14 PST 2011


I guess I wasn't exactly clear...


What I need to know is how I have to modify my classes to make them 
work with boost::bind and the CallbackRegistry.

When I try to just duplicate the way that other classes in the viewer 
use to register methods in the CallbackRegistry, I get tons of boost 
errors when building, all culminating from some missing function or 
such that is called get_pointer...

So I think I need to inherit some special class or something, but I 
can't find which one!

And what do I pass to the bind() call, there are several different 
ways to call it, with one, two, or three parameters, and what's the 
_(number) that usually gets passed last?


As you can see, I don't really know what I'm doing there.

bye,
LC


Am Sonntag, 13. November 2011 schrieb Ricky:
> Is something like:
> std::bind1st(std::mem_fun(&MyClass::MyMethod), myParameter)
> what you are looking for?
> 
> You can see working code using that on lines 350-390 of
> https://bitbucket.org/kf6kjg/gsp-420-engine-design-graphics/src/120
> a2081bb2f/src/audio_core/AudioCore.cpp (This was code I wrote while
> helping out another team in one of my classes.)
> 
> Boost's Bind function
> (http://www.boost.org/doc/libs/1_47_0/libs/bind/bind.html)
> generalizes the standard call I used, and so might be easier to
> use.  Here's the same using Boost:
> bind(&MyClass::MyMethod, myParameter)
> 
> I hope this helps,
> Ricky
> Cron Stardust
> 
> On Sat, Nov 12, 2011 at 1:54 PM, Lance Corrimal
> 
> <Lance.Corrimal at eregion.de> wrote:
> > Hi there,
> > 
> > 
> > I'm banging my head against a problem here...
> > I want to add buttons to the toolboxes.
> > 
> > The actuall adding is easy, but I have trouble figuring out what
> > I need to do to register some callbacks into the classes I need.
> > 
> > I have two classes that I need to "buttonize"... one represents
> > the graphical UI for a set of new features, and that one I
> > managed to set up as a toolbox button just fine.
> > 
> > The other one is troublesome though. I need to establish a method
> > that gets called (with no parameter, or a dummy), to toggle an
> > internal switch in my class, and I need another callback, that
> > returns the boolean value of that internal switch, to turn the
> > button green or not. Think of a simple "on/off switch".
> > 
> > What I can't figure out is what I actually have to do with my
> > class to implement the callbacks properly, and what I have to
> > pass to the function that registers the callback.
> > 
> > Any hints/tips for me?
> > 
> > thanks,
> > 
> > LC
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