889ac41694
angle changes too much between characters it finds an alternate placement), this is specified in the max_char_angle_delta property in radians (feel free to change it to degrees). It also improves the text placement around corners trying to minimise the distance between the center of the character and the line on each side. This is the major portion of the patch.
84 lines
3 KiB
C++
84 lines
3 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
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* Copyright (C) 2005 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//$Id$
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#ifndef TEXT_SYMBOLIZER_HPP
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#define TEXT_SYMBOLIZER_HPP
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// stl
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#include <string>
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// boost
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#include <boost/tuple/tuple.hpp>
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// mapnik
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#include <mapnik/color.hpp>
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namespace mapnik
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{
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enum label_placement_e {
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point_placement=1,
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line_placement=2
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};
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typedef boost::tuple<double,double> position;
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struct MAPNIK_DECL text_symbolizer
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{
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text_symbolizer(std::string const& name,std::string const& face_name,
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unsigned size,Color const& fill);
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text_symbolizer(text_symbolizer const& rhs);
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text_symbolizer& operator=(text_symbolizer const& rhs);
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std::string const& get_name() const;
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unsigned get_text_ratio() const; // target ratio for text bounding box in pixels
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void set_text_ratio(unsigned ratio);
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unsigned get_wrap_width() const; // width to wrap text at, or trigger ratio
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void set_wrap_width(unsigned ratio);
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unsigned get_label_spacing() const; // spacing between repeated labels on lines
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void set_label_spacing(unsigned spacing);
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double get_max_char_angle_delta() const; // maximum change in angle between adjacent characters
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void set_max_char_angle_delta(double angle);
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unsigned get_text_size() const;
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std::string const& get_face_name() const;
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Color const& get_fill() const;
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void set_halo_fill(Color const& fill);
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Color const& get_halo_fill() const;
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void set_halo_radius(unsigned radius);
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unsigned get_halo_radius() const;
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void set_label_placement(label_placement_e label_p);
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label_placement_e get_label_placement() const;
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void set_anchor(double x, double y);
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position const& get_anchor() const;
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void set_displacement(double x, double y);
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position const& get_displacement() const;
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private:
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std::string name_;
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std::string face_name_;
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unsigned size_;
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unsigned text_ratio_;
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unsigned wrap_width_;
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unsigned label_spacing_;
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double max_char_angle_delta_;
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Color fill_;
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Color halo_fill_;
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unsigned halo_radius_;
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label_placement_e label_p_;
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position anchor_;
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position displacement_;
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};
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}
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#endif //TEXT_SYMBOLIZER_HPP
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