30 lines
834 B
C++
30 lines
834 B
C++
#ifndef HELLO_FEATURESET_HPP
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#define HELLO_FEATURESET_HPP
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// mapnik
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#include <mapnik/datasource.hpp>
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// boost
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#include <boost/scoped_ptr.hpp> // needed for wrapping the transcoder
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// extend the mapnik::Featureset defined in include/mapnik/datasource.hpp
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class hello_featureset : public mapnik::Featureset
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{
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public:
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// this constructor can have any arguments you need
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hello_featureset(mapnik::box2d<double> const& box, std::string const& encoding);
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// desctructor
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virtual ~hello_featureset();
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// mandatory: you must expose a next() method, called when rendering
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mapnik::feature_ptr next();
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private:
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// members are up to you, but these are recommended
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mapnik::box2d<double> const& box_;
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mutable int feature_id_;
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boost::scoped_ptr<mapnik::transcoder> tr_;
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};
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#endif // HELLO_FEATURESET_HPP
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