Re: wxLua - HWND to Lua wx object

[Procházka Lukáš Ing. <LPr@...>]

Hello Paul,

let's suppose the following minimalistic example (not tested), which is to provide GetConsoleWindow()'s (WinAPI) HWND to Lua as wxWidgets/Lua object (userdata):

---- MyLib.c
#include <lauxlib.h>
#include <lua.h>

#include <wx-something?>

int GetConsoleWindowsAsWxWindow(lua_State * L)
{ HWND wnd = GetConsoleWindow(); // WinAPI specific
  wxWindow * wxw = (wxWindow *) // GetWxWindowPointerFromHWND // What to come here?
  void * ud = lua_newuserdata(L, /* What to come here? */);
  // Probably a metatable to be assigned to 'ud' here

  return 1; // The userdata, being wxWidget actually
}

static luaL_Reg funs [] =
{ { "GetConsoleWindowsAsWxWindow", GetConsoleWindowsAsWxWindow },
  { NULL, NULL }
};

__declspec(dllexport) int luaopen_MyLib(lua_State * L)
{
  lua_newtable(L);
    luaL_setfuncs(L, funs, 0);
  lua_setglobal(L, "MyLib");

  return 0;
}
----

On Wed, 13 May 2020 03:54:02 +0200, Paul K <paul@zerobrane.com> wrote:

> Hi Lukas,
>
> For some reason I assumed that the window would be part of
> wxwidgets/wxlua app. If not, why not make the Windows API call instead
> of wxwidgets?
>
> > So I have still the problem - how to create "wxWindow *" from HWND?
>
> There is wxWindowMSW::SubclassWin(WXHWND hWnd) to convert a handle
> into wxWindow, but it may not be available, even though you may have
> access to methods that it uses, so you can implement the same logic
> yourself.
>
> > 2. It seems that "wxNativeWindow" or its functions are not exported in wxLua (working with "wxLua-2.8.12.3-Lua-5.1.5-MSW-Ansi.zip" here).
>
> Yes, it's not available in wxlua, but shouldn't be difficult to add.
> Let me know if you decide to try this path and I can add it to wxlua
> in the repository I maintain (https://github.com/pkulchenko/wxlua).
>
> Paul.


--
Ing. Lukáš Procházka | mailto:LPr@pontex.cz
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