mapnik/plugins/input/templates/helloworld/hello_featureset.hpp

32 lines
864 B
C++
Raw Normal View History

#ifndef HELLO_FEATURESET_HPP
#define HELLO_FEATURESET_HPP
// mapnik
#include <mapnik/datasource.hpp>
// boost
#include <boost/scoped_ptr.hpp> // needed for wrapping the transcoder
// extend the mapnik::Featureset defined in include/mapnik/datasource.hpp
class hello_featureset : public mapnik::Featureset
{
public:
// this constructor can have any arguments you need
hello_featureset(mapnik::box2d<double> const& box, std::string const& encoding);
// desctructor
virtual ~hello_featureset();
// mandatory: you must expose a next() method, called when rendering
mapnik::feature_ptr next();
private:
// members are up to you, but these are recommended
mapnik::box2d<double> const& box_;
mutable int feature_id_;
boost::scoped_ptr<mapnik::transcoder> tr_;
2012-01-17 23:47:27 +01:00
mapnik::context_ptr ctx_;
};
#endif // HELLO_FEATURESET_HPP