> 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
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