/***************************************************************************** * * This file is part of Mapnik (c++ mapping toolkit) * * Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * *****************************************************************************/ #ifndef MAPNIK_PYTHON_BINDING_ENUMERATION_INCLUDED #define MAPNIK_PYTHON_BINDING_ENUMERATION_INCLUDED namespace mapnik { template <typename EnumWrapper> class enumeration_ : public boost::python::enum_<typename EnumWrapper::native_type> { // some short cuts typedef boost::python::enum_<typename EnumWrapper::native_type> base_type; typedef typename EnumWrapper::native_type native_type; public: enumeration_() : base_type( EnumWrapper::get_name().c_str() ) { init(); } enumeration_(const char * python_alias) : base_type( python_alias ) { init(); } #if BOOST_VERSION >= 103500 enumeration_(const char * python_alias, const char * doc) : base_type( python_alias, doc ) #else enumeration_(const char * python_alias, const char * /*doc*/) : // Boost.Python < 1.35.0 doesn't support // docstrings for enums so we ignore it. base_type( python_alias ) #endif { init(); } private: struct converter { static PyObject* convert(EnumWrapper const& v) { // Redirect conversion to a static method of our base class's // base class. A free template converter will not work because // the base_type::base typedef is protected. // Lets hope MSVC agrees that this is legal C++ using namespace boost::python::converter; return base_type::base::to_python( registered<native_type>::converters.m_class_object , static_cast<long>( v )); } }; void init() { boost::python::implicitly_convertible<native_type, EnumWrapper>(); boost::python::to_python_converter<EnumWrapper, converter >(); for (unsigned i = 0; i < EnumWrapper::MAX; ++i) { // Register the strings already defined for this enum. base_type::value( EnumWrapper::get_string( i ), native_type( i ) ); } } }; } // end of namespace mapnik #endif // MAPNIK_PYTHON_BINDING_ENUMERATION_INCLUDED