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Add header for list placement. (Unused so far.)

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Hermann Kraus 2012-01-22 02:23:39 +01:00
parent f460f90ec6
commit 5f62584385
1 changed files with 61 additions and 0 deletions
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include/mapnik/text_placements_list.hpp Normal file
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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 Hermann Kraus
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef TEXT_PLACEMENTS_LIST_HPP
#define TEXT_PLACEMENTS_LIST_HPP
#include <mapnik/text_placements.hpp>
namespace mapnik {
class text_placement_info_list;
/** Tries a list of placements. */
class text_placements_list: public text_placements
{
public:
text_placements_list();
text_placement_info_ptr get_placement_info() const;
virtual std::set<expression_ptr> get_all_expressions();
text_symbolizer_properties & add();
text_symbolizer_properties & get(unsigned i);
unsigned size() const;
private:
std::vector<text_symbolizer_properties> list_;
friend class text_placement_info_list;
};
/** List placement strategy.
* See parent class for documentation of each function. */
class text_placement_info_list : public text_placement_info
{
public:
text_placement_info_list(text_placements_list const* parent) :
text_placement_info(parent), state(0), parent_(parent) {}
bool next();
private:
unsigned state;
text_placements_list const* parent_;
};
} //namespace
#endif