> > The "self" can be a wxComboBox, wxChoice, wxListBox... and the > wxItemContainerImmutable class is along the chain of second base > classes for all of them. All wxLua userdata objects that wrap C++ > objects have a metatable that stores the classes' wxLuaBindClass > struct (wxlbind.h) which can contain whatever you want, but remember > that this struct is also stored in Lua as a void* pointer. Also, you > can't overload C++ functions by return value. The problem is how to > replace the line getting the "self" with something that first casts > the object on the stack to its original class type (wxComboBox, > wxChoice, whatever it may be) before casting it to a > wxItemContainerImmutable. Finally, this function/baseclass may be in > one library, but a different binding (wxcore and wxadv for example) > may have a class with it as it's base class. We don't even know at > compile time who uses this as a base class so we can't add a > case/if/else statement to properly cast it. >
This is a very good solution and the overhead is pretty minor. It is also clean. If you are debugging in C you can always explicitly cast the various pointers and look at the information. I sure cannot think of a better way to so it. You could store a delta instead of a pointer and save a few bytes but it would make the whole thing very obscure. This looks great. Andre ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ wxlua-users mailing list wxlua-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wxlua-users
