f1393cc019
bool hit_test(double x, double y, double tol);
2. added image_view(unsigned x, unsigned y, unsigned width, unsigned height)
allowing to select region from image data e.g (in Python):
im = Image(2048,2048)
view = im.view(0,0,256,256)
save_to_file(filename,type, view)
3. changed envelope method to return vy value in datasource classes
4. features_at_point impl for shape and postgis plug-ins
87 lines
2.8 KiB
C++
87 lines
2.8 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
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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: postgis.hpp 44 2005-04-22 18:53:54Z pavlenko $
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#ifndef POSTGIS_HPP
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#define POSTGIS_HPP
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#include <mapnik/datasource.hpp>
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#include <mapnik/envelope.hpp>
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#include <mapnik/feature.hpp>
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#include "connection_manager.hpp"
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#include <boost/lexical_cast.hpp>
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#include <set>
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using namespace mapnik;
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class postgis_datasource : public datasource
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{
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static const std::string GEOMETRY_COLUMNS;
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static const std::string SPATIAL_REF_SYS;
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const std::string uri_;
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const std::string username_;
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const std::string password_;
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const std::string table_;
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std::string geometryColumn_;
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int type_;
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int srid_;
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mapnik::Envelope<double> extent_;
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layer_descriptor desc_;
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ConnectionCreator<Connection> creator_;
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static std::string name_;
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public:
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static std::string name();
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int type() const;
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featureset_ptr features(const query& q) const;
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featureset_ptr features_at_point(coord2d const& pt) const;
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mapnik::Envelope<double> envelope() const;
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layer_descriptor get_descriptor() const;
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postgis_datasource(const parameters ¶ms);
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~postgis_datasource();
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private:
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static std::string table_from_sql(const std::string& sql);
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postgis_datasource(const postgis_datasource&);
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postgis_datasource& operator=(const postgis_datasource&);
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};
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class postgis_featureset : public Featureset
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{
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private:
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boost::shared_ptr<ResultSet> rs_;
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unsigned num_attrs_;
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mutable int totalGeomSize_;
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mutable int count_;
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public:
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postgis_featureset(const boost::shared_ptr<ResultSet>& rs,unsigned num_attrs);
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void dispose();
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feature_ptr next();
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~postgis_featureset();
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private:
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postgis_featureset(const postgis_featureset&);
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const postgis_featureset& operator=(const postgis_featureset&);
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};
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#endif //POSTGIS_HPP
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