Re: [wxlua-users] Which wxWidgets?

[Victor B. <so...@te...>]

> I am trying to use dc:DrawLines but I cant understand how wxList or
> wxPointList work:

I have been searching on mailing list and code. I seems only for 2.9 is 
implemented. I would like a version with pairs of coordinates in a lua 
table. Could be something like:

static int LUACALL wxLua_wxDC_DrawPolygon1(lua_State *L)
{
    // get number of arguments
    int argCount = lua_gettop(L);
    // wxPolygonFillMode fill_style = wxODDEVEN_RULE
    wxPolygonFillMode fill_style = (argCount >= 5 ? 
(wxPolygonFillMode)wxlua_getenumtype(L, 5) : wxODDEVEN_RULE);
    // wxCoord yoffset = 0
    wxCoord yoffset = (argCount >= 4 ? (wxCoord)wxlua_getnumbertype(L, 4) : 
0);
    // wxCoord xoffset = 0
    wxCoord xoffset = (argCount >= 3 ? (wxCoord)wxlua_getnumbertype(L, 3) : 
0);
    // const wxList points

 luaL_checktype(L, 2, LUA_TTABLE);
 int n = lua_objlen(L, 2); /* get size of table */
 double x,y;
 wxList<wxPoint> pointList;
 for (int i = 1; i <= n; i++) {
  lua_rawgeti(L, 2, i); /* get next point as {x,y} */
  luaL_checktype(L, -1, LUA_TTABLE);
  lua_rawgeti(L,-1,1);
  if (!lua_isnumber(L, -1))
   luaL_error(L, "coordinate x not a number");
  x = lua_tonumber(L ,-1)
  lua_pop(L,1);

  lua_rawgeti(L,-1,2);
  if (!lua_isnumber(L, -1))
   luaL_error(L, "coordinate Y not a number");
  y = lua_tonumber(L ,-1)
  lua_pop(L,1);

  lua_pop(L,1);
  pointList:Append(wxPoint(x,y));
 }
    //const wxList * points = (const wxList *)wxluaT_getuserdatatype(L, 2, 
wxluatype_wxList);
    // get this
    wxDC * self = (wxDC *)wxluaT_getuserdatatype(L, 1, wxluatype_wxDC);
    // call DrawPolygon
    self->DrawPolygon(&pointList, xoffset, yoffset, fill_style);

    return 0;
}

It is called as paintDC:DrawLines({{0,0},{20,40},{50,50}})
Similar for DrawLines. I dont know how to insert it in wxLua code and how 
you control function overloadings. Also perhaps you use something different 
than luaL_error.

Best Regards
Victor Bombi