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