Re: [Wxlua-users] wxluacan as namespace

[John L. <jla...@gm...>]

On 2/6/06, k. holwerda <kla...@nl...> wrote:
> Hi John,
>
> John Labenski wrote:
>
> >You can have your C function just call lua code directly.
> >m_wxlState.RunString(wxString::Format(wxT("hittest(%f, %f)"), x, y)));
> >in the lua code you can then set variables back to C++ through the bindi=
ng.
> >
> >
> But i need to call a function in Lua which gets as a parameter a wxDC
> pointer from C++.
> So i think i need to push things on the lua stack, and call a function ne=
xt?

Take a look at this, it tells you how to call lua functions from C.
http://www.lua.org/pil/25.2.html

> Also the functions to call are part of the m_script string stored inside
> each luacanvas object.
> And for each such object that script would be different in general, but
> the function is called the same ( Draw and HitTest ).
> Just reporting the functions to lua (using runstring() ) is not enough,
> as i think they must be unique.

So you'll have a wxLuaState for every object? Maybe you can just
create a table in lua to store each object (as a sub table). In each
object's table you can put the functions to call.

> But on the other hand wrapping the luacanvas object to lua does not help
> too, since the instance of the object is in the C++ canvas.
> So i do not want to create the instance inside lua code.
> Eventually i think i need to push the current (to draw/hit ) luacanvas
> object as a (this) pointer on the stack, and next the parameters to the
> member function to call on that object. And when that is ready call the
> function.

Humm, I don't think I understand. I haven't looked at the code for
wxluacan yet however.

-John