/home/andreas/src/svn/mapnik/include/mapnik/hit_test_filter.hpp

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00001 /*****************************************************************************
00002  * 
00003  * This file is part of Mapnik (c++ mapping toolkit)
00004  *
00005  * Copyright (C) 2006 Artem Pavlenko
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00020  *
00021  *****************************************************************************/
00022 
00023 //$Id$
00024 
00025 #ifndef HIT_TEST_FILTER_HPP
00026 #define HIT_TEST_FILTER_HPP
00027 
00028 #include <mapnik/feature.hpp>
00029 
00030 namespace mapnik {
00031     class hit_test_filter
00032     {
00033     public:
00034         hit_test_filter(double x, double y, double tol)
00035             : x_(x),
00036               y_(y), 
00037               tol_(tol) {}
00038         
00039         bool pass(Feature const& feature)
00040         {
00041             geometry_ptr geom = feature.get_geometry();
00042             if (geom && geom->hit_test(x_,y_,tol_))
00043                 return true;
00044             return false;
00045         }
00046         
00047     private:
00048         double x_;
00049         double y_;
00050         double tol_;
00051     };
00052 }
00053 
00054 #endif // HIT_TEST_FILTER_HPP

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