70 lines
2.2 KiB
C++
70 lines
2.2 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) 2011 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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#ifndef MAPNIK_MEMORY_DATASOURCE_HPP
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#define MAPNIK_MEMORY_DATASOURCE_HPP
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// mapnik
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#include <mapnik/datasource.hpp>
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#include <mapnik/feature_layer_desc.hpp>
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// stl
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#include <vector>
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namespace mapnik {
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class MAPNIK_DECL memory_datasource : public datasource
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{
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friend class memory_featureset;
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public:
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memory_datasource();
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virtual ~memory_datasource();
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void push(feature_ptr feature);
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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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box2d<double> envelope() const;
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layer_descriptor get_descriptor() const;
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size_t size() const;
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void clear();
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private:
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std::vector<feature_ptr> features_;
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mapnik::layer_descriptor desc_;
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};
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// This class implements a simple way of displaying point-based data
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// TODO -- possible redesign, move into separate file
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//
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class MAPNIK_DECL point_datasource : public memory_datasource {
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public:
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point_datasource() :
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feature_id_(1) {}
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void add_point(double x, double y, const char* key, const char* value);
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inline int type() const { return datasource::Vector; }
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private:
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int feature_id_;
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};
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}
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#endif // MAPNIK_MEMORY_DATASOURCE_HPP
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