520 lines
19 KiB
C++
520 lines
19 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_map.cc 17 2005-03-08 23:58:43Z pavlenko $
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// boost
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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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// mapnik
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#include <mapnik/layer.hpp>
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#include <mapnik/map.hpp>
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#include <mapnik/feature_type_style.hpp>
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#include "mapnik_enumeration.hpp"
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#include "python_optional.hpp"
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using mapnik::color;
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using mapnik::coord;
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using mapnik::box2d;
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using mapnik::layer;
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using mapnik::Map;
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struct map_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const Map& m)
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{
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return boost::python::make_tuple(m.width(),m.height(),m.srs());
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}
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static boost::python::tuple
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getstate(const Map& m)
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{
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boost::python::list l;
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for (unsigned i=0;i<m.layer_count();++i)
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{
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l.append(m.getLayer(i));
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}
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boost::python::list s;
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Map::const_style_iterator it = m.styles().begin();
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Map::const_style_iterator end = m.styles().end();
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for (; it != end; ++it)
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{
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const std::string & name = it->first;
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const mapnik::feature_type_style & style = it->second;
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boost::python::tuple style_pair = boost::python::make_tuple(name,style);
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s.append(style_pair);
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}
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return boost::python::make_tuple(m.get_current_extent(),m.background(),l,s);
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}
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static void
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setstate (Map& m, boost::python::tuple state)
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{
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using namespace boost::python;
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if (len(state) != 4)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 4-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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box2d<double> ext = extract<box2d<double> >(state[0]);
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m.zoom_to_box(ext);
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if (state[1])
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{
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color bg = extract<color>(state[1]);
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m.set_background(bg);
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}
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boost::python::list l=extract<boost::python::list>(state[2]);
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for (int i=0;i<len(l);++i)
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{
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m.addLayer(extract<layer>(l[i]));
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}
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boost::python::list s=extract<boost::python::list>(state[3]);
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for (int i=0;i<len(s);++i)
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{
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boost::python::tuple style_pair=extract<boost::python::tuple>(s[i]);
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std::string name = extract<std::string>(style_pair[0]);
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mapnik::feature_type_style style = extract<mapnik::feature_type_style>(style_pair[1]);
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m.insert_style(name, style);
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}
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}
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};
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std::vector<layer>& (Map::*layers_nonconst)() = &Map::layers;
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std::vector<layer> const& (Map::*layers_const)() const = &Map::layers;
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mapnik::feature_type_style find_style (mapnik::Map const& m, std::string const& name)
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{
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boost::optional<mapnik::feature_type_style const&> style = m.find_style(name);
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if (!style)
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{
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PyErr_SetString(PyExc_KeyError, "Invalid style name");
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boost::python::throw_error_already_set();
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}
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return *style;
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}
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bool has_metawriter(mapnik::Map const& m)
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{
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if (m.metawriters().size() >=1)
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return true;
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return false;
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}
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// TODO - we likely should allow indexing by negative number from python
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// for now, protect against negative values and kindly throw
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mapnik::featureset_ptr query_point(mapnik::Map const& m, int index, double x, double y)
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{
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if (index < 0){
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PyErr_SetString(PyExc_IndexError, "Please provide a layer index >= 0");
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boost::python::throw_error_already_set();
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}
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unsigned idx = index;
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return m.query_point(idx, x, y);
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}
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mapnik::featureset_ptr query_map_point(mapnik::Map const& m, int index, double x, double y)
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{
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if (index < 0){
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PyErr_SetString(PyExc_IndexError, "Please provide a layer index >= 0");
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boost::python::throw_error_already_set();
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}
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unsigned idx = index;
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return m.query_map_point(idx, x, y);
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}
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void export_map()
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{
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using namespace boost::python;
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// aspect ratio fix modes
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mapnik::enumeration_<mapnik::aspect_fix_mode_e>("aspect_fix_mode")
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.value("GROW_BBOX", mapnik::Map::GROW_BBOX)
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.value("GROW_CANVAS",mapnik::Map::GROW_CANVAS)
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.value("SHRINK_BBOX",mapnik::Map::SHRINK_BBOX)
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.value("SHRINK_CANVAS",mapnik::Map::SHRINK_CANVAS)
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.value("ADJUST_BBOX_WIDTH",mapnik::Map::ADJUST_BBOX_WIDTH)
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.value("ADJUST_BBOX_HEIGHT",mapnik::Map::ADJUST_BBOX_HEIGHT)
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.value("ADJUST_CANVAS_WIDTH",mapnik::Map::ADJUST_CANVAS_WIDTH)
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.value("ADJUST_CANVAS_HEIGHT", mapnik::Map::ADJUST_CANVAS_HEIGHT)
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;
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python_optional<mapnik::color> ();
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class_<std::vector<layer> >("Layers")
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.def(vector_indexing_suite<std::vector<layer> >())
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;
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class_<Map>("Map","The map object.",init<int,int,optional<std::string const&> >(
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( arg("width"),arg("height"),arg("srs") ),
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"Create a Map with a width and height as integers and, optionally,\n"
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"an srs string either with a Proj.4 epsg code ('+init=epsg:<code>')\n"
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"or with a Proj.4 literal ('+proj=<literal>').\n"
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"If no srs is specified the map will default to '+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'\n"
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"\n"
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"Usage:\n"
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">>> from mapnik import Map\n"
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">>> m = Map(600,400)\n"
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">>> m\n"
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"<mapnik._mapnik.Map object at 0x6a240>\n"
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">>> m.srs\n"
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"'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'\n"
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))
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.def_pickle(map_pickle_suite()
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)
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.def("append_style",&Map::insert_style,
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(arg("style_name"),arg("style_object")),
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"Insert a Mapnik Style onto the map by appending it.\n"
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"\n"
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"Usage:\n"
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">>> sty\n"
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"<mapnik._mapnik.Style object at 0x6a330>\n"
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">>> m.append_style('Style Name', sty)\n"
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"True # style object added to map by name\n"
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">>> m.append_style('Style Name', sty)\n"
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"False # you can only append styles with unique names\n"
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)
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.def("buffered_envelope",
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&Map::get_buffered_extent,
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"Get the Box2d() of the Map given\n"
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"the Map.buffer_size.\n"
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"\n"
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"Usage:\n"
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">>> m = Map(600,400)\n"
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">>> m.envelope()\n"
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"Box2d(-1.0,-1.0,0.0,0.0)\n"
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">>> m.buffered_envelope()\n"
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"Box2d(-1.0,-1.0,0.0,0.0)\n"
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">>> m.buffer_size = 1\n"
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">>> m.buffered_envelope()\n"
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"Box2d(-1.02222222222,-1.02222222222,0.0222222222222,0.0222222222222)\n"
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)
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.def("envelope",
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make_function(&Map::get_current_extent,
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return_value_policy<copy_const_reference>()),
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"Return the Map Box2d object\n"
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"and print the string representation\n"
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"of the current extent of the map.\n"
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"\n"
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"Usage:\n"
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">>> m.envelope()\n"
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"Box2d(-0.185833333333,-0.96,0.189166666667,-0.71)\n"
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">>> dir(m.envelope())\n"
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"...'center', 'contains', 'expand_to_include', 'forward',\n"
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"...'height', 'intersect', 'intersects', 'inverse', 'maxx',\n"
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"...'maxy', 'minx', 'miny', 'width'\n"
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)
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.def("find_style",
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find_style,
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(arg("style_name")),
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"Query the Map for a style by name and return\n"
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"a style object if found or raise KeyError\n"
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"style if not found.\n"
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"\n"
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"Usage:\n"
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">>> m.find_style('Style Name')\n"
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"<mapnik._mapnik.Style object at 0x654f0>\n"
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)
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.def("has_metawriter",
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has_metawriter,
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"Check if the Map has any active metawriters\n"
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"\n"
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"Usage:\n"
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">>> m.has_metawriter()\n"
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"False\n"
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)
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.def("pan",&Map::pan,
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(arg("x"),arg("y")),
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"Set the Map center at a given x,y location\n"
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"as integers in the coordinates of the pixmap or map surface.\n"
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"\n"
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"Usage:\n"
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">>> m = Map(600,400)\n"
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">>> m.envelope().center()\n"
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"Coord(-0.5,-0.5) # default Map center\n"
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">>> m.pan(-1,-1)\n"
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">>> m.envelope().center()\n"
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"Coord(0.00166666666667,-0.835)\n"
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)
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.def("pan_and_zoom",&Map::pan_and_zoom,
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(arg("x"),arg("y"),arg("factor")),
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"Set the Map center at a given x,y location\n"
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"and zoom factor as a float.\n"
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"\n"
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"Usage:\n"
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">>> m = Map(600,400)\n"
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">>> m.envelope().center()\n"
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"Coord(-0.5,-0.5) # default Map center\n"
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">>> m.scale()\n"
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"-0.0016666666666666668\n"
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">>> m.pan_and_zoom(-1,-1,0.25)\n"
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">>> m.scale()\n"
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"0.00062500000000000001\n"
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)
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.def("query_map_point",query_map_point,
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(arg("layer_idx"),arg("pixel_x"),arg("pixel_y")),
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"Query a Map Layer (by layer index) for features \n"
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"intersecting the given x,y location in the pixel\n"
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"coordinates of the rendered map image.\n"
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"Layer index starts at 0 (first layer in map).\n"
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"Will return a Mapnik Featureset if successful\n"
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"otherwise will return None.\n"
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"\n"
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"Usage:\n"
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">>> featureset = m.query_map_point(0,200,200)\n"
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">>> featureset\n"
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"<mapnik._mapnik.Featureset object at 0x23b0b0>\n"
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">>> featureset.features\n"
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">>> [<mapnik.Feature object at 0x3995630>]\n"
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)
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.def("query_point",query_point,
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(arg("layer idx"),arg("x"),arg("y")),
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"Query a Map Layer (by layer index) for features \n"
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"intersecting the given x,y location in the coordinates\n"
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"of map projection.\n"
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"Layer index starts at 0 (first layer in map).\n"
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"Will return a Mapnik Featureset if successful\n"
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"otherwise will return None.\n"
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"\n"
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"Usage:\n"
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">>> featureset = m.query_point(0,-122,48)\n"
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">>> featureset\n"
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"<mapnik._mapnik.Featureset object at 0x23b0b0>\n"
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">>> featureset.features\n"
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">>> [<mapnik.Feature object at 0x3995630>]\n"
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)
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.def("remove_all",&Map::remove_all,
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"Remove all Mapnik Styles and layers from the Map.\n"
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"\n"
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"Usage:\n"
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">>> m.remove_all()\n"
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)
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.def("remove_style",&Map::remove_style,
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(arg("style_name")),
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"Remove a Mapnik Style from the map.\n"
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"\n"
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"Usage:\n"
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">>> m.remove_style('Style Name')\n"
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)
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.def("resize",&Map::resize,
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(arg("width"),arg("height")),
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"Resize a Mapnik Map.\n"
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"\n"
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"Usage:\n"
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">>> m.resize(64,64)\n"
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)
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.def("scale", &Map::scale,
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"Return the Map Scale.\n"
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"Usage:\n"
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"\n"
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">>> m.scale()\n"
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)
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.def("scale_denominator", &Map::scale_denominator,
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"Return the Map Scale Denominator.\n"
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"Usage:\n"
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"\n"
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">>> m.scale_denominator()\n"
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)
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.def("view_transform",&Map::view_transform,
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"Return the map ViewTransform object\n"
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"which is used internally to convert between\n"
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"geographic coordinates and screen coordinates.\n"
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"\n"
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"Usage:\n"
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">>> m.view_transform()\n"
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)
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.def("zoom",&Map::zoom,
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(arg("factor")),
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"Zoom in or out by a given factor.\n"
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"Positive number zooms in, negative number\n"
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"zooms out.\n"
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"\n"
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"Usage:\n"
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"\n"
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">>> m.zoom(0.25)\n"
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)
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.def("zoom_all",&Map::zoom_all,
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"Set the geographical extent of the map\n"
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"to the combined extents of all active layers.\n"
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"\n"
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"Usage:\n"
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">>> m.zoom_all()\n"
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)
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.def("zoom_to_box",&Map::zoom_to_box,
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(arg("Boxd2")),
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"Set the geographical extent of the map\n"
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"by specifying a Mapnik Box2d.\n"
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"\n"
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"Usage:\n"
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">>> extext = Box2d(-180.0, -90.0, 180.0, 90.0)\n"
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">>> m.zoom_to_box(extent)\n"
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)
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.def("get_metawriter_property", &Map::get_metawriter_property,
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(arg("name")),
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"Reads a metawriter property.\n"
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"These properties are completely user-defined and can be used to"
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"create filenames, etc.\n"
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"\n"
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"Usage:\n"
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">>> map.set_metawriter_property(\"x\", \"10\")\n"
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">>> map.get_metawriter_property(\"x\")\n"
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"10\n"
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)
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.def("set_metawriter_property", &Map::set_metawriter_property,
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(arg("name"),arg("value")),
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"Sets a metawriter property.\n"
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"These properties are completely user-defined and can be used to"
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"create filenames, etc.\n"
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"\n"
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"Usage:\n"
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">>> map.set_metawriter_property(\"x\", str(x))\n"
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">>> map.set_metawriter_property(\"y\", str(y))\n"
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">>> map.set_metawriter_property(\"z\", str(z))\n"
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"\n"
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"Use a path like \"[z]/[x]/[y].json\" to create filenames.\n"
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)
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.def("extra_attributes",&Map::get_extra_attributes,return_value_policy<copy_const_reference>(),"TODO")
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.add_property("aspect_fix_mode",
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&Map::get_aspect_fix_mode,
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&Map::set_aspect_fix_mode,
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// TODO - how to add arg info to properties?
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//(arg("aspect_fix_mode")),
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"Get/Set aspect fix mode.\n"
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"Usage:\n"
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"\n"
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">>> m.aspect_fix_mode = aspect_fix_mode.GROW_BBOX\n"
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)
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.add_property("background",make_function
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(&Map::background,return_value_policy<copy_const_reference>()),
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&Map::set_background,
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"The background color of the map.\n"
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"\n"
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"Usage:\n"
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">>> m.background = Color('steelblue')\n"
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)
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.add_property("buffer_size",
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&Map::buffer_size,
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&Map::set_buffer_size,
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"Get/Set the size of buffer around map in pixels.\n"
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"\n"
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"Usage:\n"
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">>> m.buffer_size\n"
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"0 # zero by default\n"
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">>> m.buffer_size = 2\n"
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">>> m.buffer_size\n"
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"2\n"
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)
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.add_property("height",
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&Map::height,
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&Map::set_height,
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"Get/Set the height of the map in pixels.\n"
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"Minimum settable size is 16 pixels.\n"
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"\n"
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"Usage:\n"
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">>> m.height\n"
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"400\n"
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">>> m.height = 600\n"
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">>> m.height\n"
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"600\n"
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)
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.add_property("layers",make_function
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(layers_nonconst,return_value_policy<reference_existing_object>()),
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"The list of map layers.\n"
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"\n"
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"Usage:\n"
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">>> m.layers\n"
|
|
"<mapnik._mapnik.layers object at 0x6d458>"
|
|
">>> m.layers[0]\n"
|
|
"<mapnik._mapnik.layer object at 0x5fe130>\n"
|
|
)
|
|
|
|
.add_property("srs",
|
|
make_function(&Map::srs,return_value_policy<copy_const_reference>()),
|
|
&Map::set_srs,
|
|
"Spatial reference in Proj.4 format.\n"
|
|
"Either an epsg code or proj literal.\n"
|
|
"For example, a proj literal:\n"
|
|
"\t'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs'\n"
|
|
"and a proj epsg code:\n"
|
|
"\t'+init=epsg:4326'\n"
|
|
"\n"
|
|
"Note: using epsg codes requires the installation of\n"
|
|
"the Proj.4 'epsg' data file normally found in '/usr/local/share/proj'\n"
|
|
"\n"
|
|
"Usage:\n"
|
|
">>> m.srs\n"
|
|
"'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs' # The default srs if not initialized with custom srs\n"
|
|
">>> # set to google mercator with Proj.4 literal\n"
|
|
"... \n"
|
|
">>> m.srs = '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs +over'\n"
|
|
)
|
|
|
|
.add_property("width",
|
|
&Map::width,
|
|
&Map::set_width,
|
|
"Get/Set the width of the map in pixels.\n"
|
|
"Minimum settable size is 16 pixels.\n"
|
|
"\n"
|
|
"Usage:\n"
|
|
">>> m.width\n"
|
|
"600\n"
|
|
">>> m.width = 800\n"
|
|
">>> m.width\n"
|
|
"800\n"
|
|
)
|
|
;
|
|
}
|