Re: Multiple namespaces are working now, was Re: [Wxlua-users] wxLua packaging

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

John Labenski wrote:

>>But this does not work, when run from the run script menu, it still
>>calls function that are wrong.
>>    
>>
>
>I've changed wxluacan to use the "wxluacan" namespace and everything
>seems to work properly. Please let me know if there are other
>problems.
>  
>
I did update from cvs, and in the wxluacan sample in the menu -> 
ModifyObjects->Run Script.
And you run the script in wxCanlua.acripts/incircles.lua.

I get still the same error:

attempt to call field `getCan` ( a nil value ).

Do you not get this?

Now if you change all the name spaces in lua to use wx instead  of 
wxcanlua, it all works well.
( so in the rules file and in the script ).

>I also changed the interface file and removed %delete for the classes.
>It's meant only for classes that lua itself will delete, like wxColour
>for example. 
>
But what if both can happen? Can an object not be created in lua and/or C++?
Like here i can imagine one wants to create a wxlCan in lua script, and 
add objects to it in lua.
But in the sample it is all added to C++ instead.

>If I
>understand correctly the c++ AddObject function takes ownership of the
>pointer and deletes it in the destructor.
>  
>
Yes, as i say, i can imagine that for a class both can happen.
I would say this is a perfect use of smart pointers. In that case Lua 
and C++ can hold a smrtPtr to the object, who releases it last will 
delete the object.
So making the wxLuaState::m_pTrackedList a smart pointer list, will 
already solve it.
Since then i would use for say the object in a canvas smart pointers 
too, and all will be fine, no matter if Lua or C++ releases its smrtPtr 
to the object first.
I think  it would make thinks easier.
 
Klaas