Re: [Wxlua-users] wxluacan as namespace

[klaas.holwerda <kho...@xs...>]

John Labenski wrote:

>Humm, I don't think I understand. I haven't looked at the code for
>wxluacan yet however.
>  
>
Let me try to explain what i want to do without going into detail.

First canvasobjects are placed on a canvas and the are drawn and 
hittested by a member function of that cavasobject.
So for each derived canvasobject there is a different draw and hittest 
functions.
This how there is a rectangle and circle object already. The idea is to 
implement a special canvasobject which has its draw and hittest function 
implemented as a lua function. This lua function can be edited runtime 
if wanted, and the functions (draw and hittest ) are stored in a string 
inside the canvasobject.
So as soon as the object needs to be drawn on the canvas, it needs to 
call the function stored inside the script.
And as input parameter it will get the wxDC* that is used to draw.
The lua canvas object is created in C++ and stored in the canvas. Let's 
assume the default script string is drawing a rectangle. When drawing 
the canvas and arriving at this specific lua canvas object stored in 
that canvas,  i already have the object  pointer (  the c++ object),  
and only need to call  a (draw/hittest) function, which is stored in its 
script string. For each luacanvasobject instance added to the canvas, 
the script string  may  have its own implementation.  One draws a single 
rectangle, and another draws a whole set of whatever.

Easy to say, but i realize it is not so simple ;-)
Maybe i should begin with making all drawing and hittets functions unique.
Like:
MYOBJ_1_Draw( )
MYOBJ_1_Hittest( )
MYOBJ_2_Draw( )
MYOBJ_2_Hittest( )
 etc.
That would reduce it to loading those function at the start, and call 
the right one from C++.

First read some more about calling lua functions,

Thanks,

Klaas