531 lines
15 KiB
C++
531 lines
15 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: map.cpp 17 2005-03-08 23:58:43Z pavlenko $,
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#include <mapnik/map.hpp>
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#include <mapnik/style.hpp>
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#include <mapnik/datasource.hpp>
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#include <mapnik/projection.hpp>
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#include <mapnik/filter_featureset.hpp>
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#include <mapnik/hit_test_filter.hpp>
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#include <mapnik/scale_denominator.hpp>
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namespace mapnik
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{
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static const char * aspect_fix_mode_strings[] = {
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"GROW_BBOX",
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"GROW_CANVAS",
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"SHRINK_BBOX",
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"SHRINK_CANVAS",
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"ADJUST_BBOX_WIDTH",
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"ADJUST_BBOX_HEIGHT",
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"ADJUST_CANVAS_WIDTH",
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"ADJUST_CANVAS_HEIGHT",
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""
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};
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IMPLEMENT_ENUM( mapnik::aspect_fix_mode_e, aspect_fix_mode_strings );
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Map::Map()
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: width_(400),
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height_(400),
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srs_("+proj=latlong +datum=WGS84"),
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buffer_size_(0),
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aspectFixMode_(GROW_BBOX) {}
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Map::Map(int width,int height, std::string const& srs)
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: width_(width),
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height_(height),
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srs_(srs),
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buffer_size_(0),
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aspectFixMode_(GROW_BBOX) {}
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Map::Map(const Map& rhs)
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: width_(rhs.width_),
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height_(rhs.height_),
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srs_(rhs.srs_),
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buffer_size_(rhs.buffer_size_),
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background_(rhs.background_),
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styles_(rhs.styles_),
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layers_(rhs.layers_),
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aspectFixMode_(rhs.aspectFixMode_),
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currentExtent_(rhs.currentExtent_) {}
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Map& Map::operator=(const Map& rhs)
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{
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if (this==&rhs) return *this;
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width_=rhs.width_;
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height_=rhs.height_;
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srs_=rhs.srs_;
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buffer_size_ = rhs.buffer_size_;
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background_=rhs.background_;
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styles_=rhs.styles_;
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layers_=rhs.layers_;
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aspectFixMode_=rhs.aspectFixMode_;
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return *this;
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}
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std::map<std::string,feature_type_style> const& Map::styles() const
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{
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return styles_;
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}
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std::map<std::string,feature_type_style> & Map::styles()
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{
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return styles_;
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}
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Map::style_iterator Map::begin_styles()
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{
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return styles_.begin();
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}
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Map::style_iterator Map::end_styles()
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{
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return styles_.end();
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}
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Map::const_style_iterator Map::begin_styles() const
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{
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return styles_.begin();
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}
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Map::const_style_iterator Map::end_styles() const
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{
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return styles_.end();
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}
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bool Map::insert_style(std::string const& name,feature_type_style const& style)
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{
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return styles_.insert(make_pair(name,style)).second;
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}
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void Map::remove_style(std::string const& name)
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{
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styles_.erase(name);
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}
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bool Map::insert_fontset(std::string const& name, font_set const& fontset)
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{
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return fontsets_.insert(make_pair(name, fontset)).second;
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}
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font_set const& Map::find_fontset(std::string const& name) const
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{
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std::map<std::string,font_set>::const_iterator itr = fontsets_.find(name);
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if (itr!=fontsets_.end())
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return itr->second;
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static font_set default_fontset;
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return default_fontset;
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}
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std::map<std::string,font_set> const& Map::fontsets() const
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{
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return fontsets_;
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}
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std::map<std::string,font_set> & Map::fontsets()
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{
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return fontsets_;
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}
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boost::optional<feature_type_style const&> Map::find_style(std::string const& name) const
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{
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std::map<std::string,feature_type_style>::const_iterator itr = styles_.find(name);
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if (itr!=styles_.end())
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return boost::optional<feature_type_style const&>(itr->second);
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else
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return boost::optional<feature_type_style const&>() ;
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}
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size_t Map::layerCount() const
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{
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return layers_.size();
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}
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void Map::addLayer(const layer& l)
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{
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layers_.push_back(l);
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}
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void Map::removeLayer(size_t index)
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{
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layers_.erase(layers_.begin()+index);
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}
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void Map::remove_all()
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{
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layers_.clear();
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styles_.clear();
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}
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const layer& Map::getLayer(size_t index) const
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{
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return layers_[index];
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}
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layer& Map::getLayer(size_t index)
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{
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return layers_[index];
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}
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std::vector<layer> const& Map::layers() const
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{
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return layers_;
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}
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std::vector<layer> & Map::layers()
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{
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return layers_;
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}
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unsigned Map::getWidth() const
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{
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return width_;
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}
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unsigned Map::getHeight() const
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{
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return height_;
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}
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void Map::setWidth(unsigned width)
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{
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if (width >= MIN_MAPSIZE && width <= MAX_MAPSIZE)
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{
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width_=width;
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fixAspectRatio();
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}
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}
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void Map::setHeight(unsigned height)
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{
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if (height >= MIN_MAPSIZE && height <= MAX_MAPSIZE)
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{
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height_=height;
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fixAspectRatio();
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}
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}
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void Map::resize(unsigned width,unsigned height)
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{
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if (width >= MIN_MAPSIZE && width <= MAX_MAPSIZE &&
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height >= MIN_MAPSIZE && height <= MAX_MAPSIZE)
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{
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width_=width;
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height_=height;
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fixAspectRatio();
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}
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}
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std::string const& Map::srs() const
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{
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return srs_;
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}
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void Map::set_srs(std::string const& srs)
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{
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srs_ = srs;
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}
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void Map::set_buffer_size( int buffer_size)
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{
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buffer_size_ = buffer_size;
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}
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int Map::buffer_size() const
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{
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return buffer_size_;
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}
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boost::optional<color> const& Map::background() const
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{
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return background_;
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}
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void Map::set_background(const color& c)
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{
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background_ = c;
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}
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void Map::zoom(double factor)
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{
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coord2d center = currentExtent_.center();
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double w = factor * currentExtent_.width();
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double h = factor * currentExtent_.height();
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currentExtent_ = box2d<double>(center.x - 0.5 * w,
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center.y - 0.5 * h,
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center.x + 0.5 * w,
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center.y + 0.5 * h);
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fixAspectRatio();
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}
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void Map::zoom_all()
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{
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try
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{
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projection proj0(srs_);
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box2d<double> ext;
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bool first = true;
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std::vector<layer>::const_iterator itr = layers_.begin();
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std::vector<layer>::const_iterator end = layers_.end();
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while (itr != end)
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{
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std::string const& layer_srs = itr->srs();
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projection proj1(layer_srs);
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proj_transform prj_trans(proj0,proj1);
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box2d<double> layerExt = itr->envelope();
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double x0 = layerExt.minx();
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double y0 = layerExt.miny();
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double z0 = 0.0;
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double x1 = layerExt.maxx();
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double y1 = layerExt.maxy();
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double z1 = 0.0;
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prj_trans.backward(x0,y0,z0);
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prj_trans.backward(x1,y1,z1);
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box2d<double> layerExt2(x0,y0,x1,y1);
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#ifdef MAPNIK_DEBUG
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std::clog << " layer1 - > " << layerExt << "\n";
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std::clog << " layer2 - > " << layerExt2 << "\n";
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#endif
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if (first)
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{
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ext = layerExt2;
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first = false;
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}
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else
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{
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ext.expand_to_include(layerExt2);
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}
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++itr;
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}
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zoomToBox(ext);
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}
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catch (proj_init_error & ex)
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{
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std::clog << "proj_init_error:" << ex.what() << '\n';
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}
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}
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void Map::zoomToBox(const box2d<double> &box)
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{
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currentExtent_=box;
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fixAspectRatio();
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}
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void Map::fixAspectRatio()
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{
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double ratio1 = (double) width_ / (double) height_;
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double ratio2 = currentExtent_.width() / currentExtent_.height();
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if (ratio1 == ratio2) return;
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switch(aspectFixMode_)
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{
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case ADJUST_BBOX_HEIGHT:
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currentExtent_.height(currentExtent_.width() / ratio1);
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break;
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case ADJUST_BBOX_WIDTH:
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currentExtent_.width(currentExtent_.height() * ratio1);
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break;
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case ADJUST_CANVAS_HEIGHT:
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height_ = int (width_ / ratio2 + 0.5);
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break;
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case ADJUST_CANVAS_WIDTH:
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width_ = int (height_ * ratio2 + 0.5);
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break;
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case GROW_BBOX:
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if (ratio2 > ratio1)
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currentExtent_.height(currentExtent_.width() / ratio1);
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else
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currentExtent_.width(currentExtent_.height() * ratio1);
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break;
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case SHRINK_BBOX:
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if (ratio2 < ratio1)
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currentExtent_.height(currentExtent_.width() / ratio1);
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else
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currentExtent_.width(currentExtent_.height() * ratio1);
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break;
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case GROW_CANVAS:
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if (ratio2 > ratio1)
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width_ = (int) (height_ * ratio2 + 0.5);
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else
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height_ = int (width_ / ratio2 + 0.5);
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break;
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case SHRINK_CANVAS:
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if (ratio2 > ratio1)
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height_ = int (width_ / ratio2 + 0.5);
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else
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width_ = (int) (height_ * ratio2 + 0.5);
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break;
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default:
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if (ratio2 > ratio1)
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currentExtent_.height(currentExtent_.width() / ratio1);
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else
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currentExtent_.width(currentExtent_.height() * ratio1);
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break;
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}
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}
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const box2d<double>& Map::getCurrentExtent() const
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{
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return currentExtent_;
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}
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box2d<double> Map::get_buffered_extent() const
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{
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double extra = 2.0 * scale() * buffer_size_;
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box2d<double> ext(currentExtent_);
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ext.width(currentExtent_.width() + extra);
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ext.height(currentExtent_.height() + extra);
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return ext;
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}
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void Map::pan(int x,int y)
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{
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int dx = x - int(0.5 * width_);
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int dy = int(0.5 * height_) - y;
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double s = width_/currentExtent_.width();
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double minx = currentExtent_.minx() + dx/s;
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double maxx = currentExtent_.maxx() + dx/s;
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double miny = currentExtent_.miny() + dy/s;
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double maxy = currentExtent_.maxy() + dy/s;
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currentExtent_.init(minx,miny,maxx,maxy);
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}
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void Map::pan_and_zoom(int x,int y,double factor)
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{
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pan(x,y);
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zoom(factor);
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}
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double Map::scale() const
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{
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if (width_>0)
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return currentExtent_.width()/width_;
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return currentExtent_.width();
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}
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double Map::scale_denominator() const
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{
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projection map_proj(srs_);
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return mapnik::scale_denominator( *this, map_proj.is_geographic());
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}
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CoordTransform Map::view_transform() const
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{
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return CoordTransform(width_,height_,currentExtent_);
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}
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featureset_ptr Map::query_point(unsigned index, double x, double y) const
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{
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if ( index< layers_.size())
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{
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mapnik::layer const& layer = layers_[index];
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try
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{
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double z = 0;
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mapnik::projection dest(srs_);
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mapnik::projection source(layer.srs());
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proj_transform prj_trans(source,dest);
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prj_trans.backward(x,y,z);
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double minx = currentExtent_.minx();
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double miny = currentExtent_.miny();
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double maxx = currentExtent_.maxx();
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double maxy = currentExtent_.maxy();
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prj_trans.backward(minx,miny,z);
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prj_trans.backward(maxx,maxy,z);
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double tol = (maxx - minx) / width_ * 3;
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mapnik::datasource_ptr ds = layer.datasource();
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if (ds)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << " query at point tol = " << tol << " (" << x << "," << y << ")\n";
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#endif
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featureset_ptr fs = ds->features_at_point(mapnik::coord2d(x,y));
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if (fs)
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return featureset_ptr(new filter_featureset<hit_test_filter>(fs,hit_test_filter(x,y,tol)));
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}
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}
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catch (...)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "exception caught in \"query_map_point\"\n";
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#endif
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}
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}
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return featureset_ptr();
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}
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featureset_ptr Map::query_map_point(unsigned index, double x, double y) const
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{
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if ( index< layers_.size())
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{
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mapnik::layer const& layer = layers_[index];
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CoordTransform tr = view_transform();
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tr.backward(&x,&y);
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try
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{
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mapnik::projection dest(srs_);
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mapnik::projection source(layer.srs());
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proj_transform prj_trans(source,dest);
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double z = 0;
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prj_trans.backward(x,y,z);
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double minx = currentExtent_.minx();
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double miny = currentExtent_.miny();
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double maxx = currentExtent_.maxx();
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double maxy = currentExtent_.maxy();
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prj_trans.backward(minx,miny,z);
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prj_trans.backward(maxx,maxy,z);
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double tol = (maxx - minx) / width_ * 3;
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mapnik::datasource_ptr ds = layer.datasource();
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if (ds)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << " query at point tol = " << tol << " (" << x << "," << y << ")\n";
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#endif
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featureset_ptr fs = ds->features_at_point(mapnik::coord2d(x,y));
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if (fs)
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return featureset_ptr(new filter_featureset<hit_test_filter>(fs,hit_test_filter(x,y,tol)));
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}
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}
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catch (...)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "exception caught in \"query_map_point\"\n";
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#endif
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}
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}
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return featureset_ptr();
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}
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Map::~Map() {}
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}
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