Re: IUP NATIVEPARENT (was: Error handling in IUP)

["Peter Loveday" <peter@...>]

Finally got this to work :)


> > I've come across another issue now though.  How do I use the NATIVEPARENT 
> > attribute for iup.dialog?
>   Since its value is a HWND, in Lua this is an userdata.
>
>   So some how you show push that value in Lua and use it:
Right, I've found in fact it pretty much must be a light userdata too, or it 
has the same issue as string (at least any use of lua_newuserdata does, as 
it creates a new container to hold the actual pointer in).  Makes sense I 
suppose, as it is just a plain handle/pointer, so thats all fine.
However:

> dlg = iup.dialog
> {
>   nativeparent = nativeparent_hwnd,
>    ...
> }
This doesn't work.

Nor does

 dlg.nativeparent = nativeparent_hwnd

The issue in these cases seems to be iuplua.lua's implementation of 
ihandle_settable(), which will not pass through light userdata (pointer) 
types to the underlying ihandle object.

I have, however, got it working setting it directly, using:

 iup.SetAttribute(dlg, "NATIVEPARENT", nativeparent_hwnd)

Thanks!

Love, Light and Peace,
- Peter Loveday