Re: [Wxlua-users] new wxluacan sample

[k. h. <kla...@nl...>]

Hi John,

John Labenski wrote:

>Sorry, I've been away.
>
I expected something like that.

> I'll try it out tomorrow, does it depend on
>anything?
>
It depends on nothing, only Cmake to generate all makestuff  needed.

> It sounds good if not.
>  
>
I think the nice thing is that there will be a canvas object which calls 
function from C++ in Lua.
e.g. to draw the object a function is called in lua with as input 
parameter wxDC (comming from the C++ cnavs object). The same could be 
done for the hit test function.

The second feature is the command processor. It has do undo.
And  we can use as a central point for wrapping functions.

The nice thing would be  to wrap all  classes in this sample. I managed 
to do the rectangle (working around all the wrapping problem we have ), 
what i found as a bug  the next.

delete m_pTrackedList;

One can add object to the canvas, and of course they will be owned by 
the canvas.
But Lua wants to delete them whn closing the program.

I think there are  two solution:
- make in the *.i file a %notrack keyword, which in this constrcutor 
function

static int LUACALL wxlCanObj_constructor(lua_State *L)

removes this line

wxLua_addToTrackedMemoryList(wxlState, (wxlCanObj *)returns);


OR

use smart pointers for situations like this, where it does not matter 
when who deletes the object first, lua or the C++ canvas.

I think the first solution is for the moment the easiest. Would it be 
simple to add this?

>I've been playing with writing a simple Sudoku solver, something where
>  
>
Do you have a link? I never heard of Sudoku?

>I could make the drawing of the grid in c++, as a widget.
>
Sounds like canvas needs too?

> I'd bind
>that to lua that would run the code to solve it. It'd be pretty basic,
>but vaguely useful to people who like Sudoku. You could of course just
>do the whole thing in lua, but I couldn't think of another binding
>demo...
>  
>
Several sample/demos would not be bad, and maybe we can combine your 
idea with my sample.
e.g Objects on a canvas which can be dragged, which form together the game??

But lets make the bindings work first. I will try to test your new mods 
today,

regards,

Klaas


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