84 lines
2.6 KiB
C++
84 lines
2.6 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) 2011 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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#ifndef MAPNIK_TEXT_PLACEMENTS_SIMPLE_HPP
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#define MAPNIK_TEXT_PLACEMENTS_SIMPLE_HPP
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// mapnik
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#include <mapnik/text_placements/base.hpp>
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namespace mapnik {
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class text_placement_info_simple;
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typedef enum {
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NORTH,
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EAST,
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SOUTH,
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WEST,
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NORTHEAST,
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SOUTHEAST,
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NORTHWEST,
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SOUTHWEST,
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EXACT_POSITION
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} directions_t;
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/** Automatically generates placement options from a user selected list of directions and text sizes. */
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class text_placements_simple: public text_placements
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{
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public:
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text_placements_simple();
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text_placements_simple(std::string positions);
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text_placement_info_ptr get_placement_info(double scale_factor) const;
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void set_positions(std::string positions);
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std::string get_positions();
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static text_placements_ptr from_xml(xml_node const &xml, fontset_map const & fontsets);
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private:
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std::string positions_;
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std::vector<directions_t> direction_;
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std::vector<int> text_sizes_;
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friend class text_placement_info_simple;
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};
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/** Simple placement strategy.
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* See parent class for documentation of each function. */
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class text_placement_info_simple : public text_placement_info
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{
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public:
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text_placement_info_simple(text_placements_simple const* parent,
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double scale_factor)
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: text_placement_info(parent, scale_factor),
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state(0), position_state(0), parent_(parent)
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{
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}
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bool next();
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protected:
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bool next_position_only();
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unsigned state;
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unsigned position_state;
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text_placements_simple const* parent_;
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};
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} //namespace
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#endif // MAPNIK_TEXT_PLACEMENTS_SIMPLE_HPP
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