123 lines
4 KiB
C++
123 lines
4 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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//$Id: mapnik_layer.cc 17 2005-03-08 23:58:43Z pavlenko $
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#include <boost/python.hpp>
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#include <boost/python/detail/api_placeholder.hpp>
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#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
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#include <layer.hpp>
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using mapnik::Layer;
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using mapnik::parameters;
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struct layer_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const Layer& l)
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{
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using namespace boost::python;
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return boost::python::make_tuple(l.params());
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}
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static boost::python::tuple
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getstate(const Layer& l)
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{
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using namespace boost::python;
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std::vector<std::string> const& styles=l.styles();
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std::vector<std::string>::const_iterator itr=styles.begin();
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boost::python::list py_styles;
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while (itr!=styles.end())
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{
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py_styles.append(*itr++);
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}
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return boost::python::make_tuple(l.getMinZoom(),
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l.getMaxZoom(),
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py_styles);
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}
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static void
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setstate (Layer& l, boost::python::tuple state)
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{
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using namespace boost::python;
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if (len(state) != 3)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 3-item tuple in call to __setstate__; got %s"
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% state).ptr()
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);
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throw_error_already_set();
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}
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l.setMinZoom(extract<double>(state[0]));
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l.setMaxZoom(extract<double>(state[1]));
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boost::python::list styles=extract<boost::python::list>(state[2]);
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for (int i=0;i<len(styles);++i)
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{
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l.add_style(extract<std::string>(styles[i]));
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}
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}
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};
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namespace
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{
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//user-friendly wrapper that uses Python dictionary
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using namespace boost::python;
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Layer create_layer(const dict& d)
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{
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parameters params;
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boost::python::list keys=d.keys();
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for (int i=0;i<len(keys);++i)
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{
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std::string key=extract<std::string>(keys[i]);
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std::string value=extract<std::string>(d[key]);
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params[key] = value;
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}
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return Layer(params);
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}
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}
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void export_layer()
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{
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using namespace boost::python;
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class_<std::vector<std::string> >("Styles")
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.def(vector_indexing_suite<std::vector<std::string>,true >())
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;
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class_<Layer>("Layer","A map layer.",no_init)
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.def("name",&Layer::name,return_value_policy<copy_const_reference>(), "Return the name of the layer.")
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.def("title",&Layer::title,return_value_policy<copy_const_reference>(), "Return the title of the layer.")
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.def("abstract",&Layer::abstract,return_value_policy<copy_const_reference>(), "Return the abstract of the layer.")
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.def("params",&Layer::params,return_value_policy<reference_existing_object>(), "The configuration parameters of the layer. These vary depending on the type of data source.")
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.def("envelope",&Layer::envelope, "Return the geographic envelope/bounding box of the data in the layer.")
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.add_property("minzoom",&Layer::getMinZoom,&Layer::setMinZoom)
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.add_property("maxzoom",&Layer::getMaxZoom,&Layer::setMaxZoom)
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.add_property("styles",make_function
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(&Layer::styles,return_value_policy<reference_existing_object>()))
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.def_pickle(layer_pickle_suite())
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;
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def("CreateLayer",&create_layer);
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}
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