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109 lines
3 KiB
C++
109 lines
3 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) 2025 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_GROUP_LAYOUT_MANAGER_HPP
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#define MAPNIK_GROUP_LAYOUT_MANAGER_HPP
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// mapnik
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#include <mapnik/geometry/box2d.hpp>
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#include <mapnik/pixel_position.hpp>
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#include <mapnik/group/group_layout.hpp>
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// stl
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#include <vector>
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namespace mapnik {
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struct group_layout_manager
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{
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using bound_box = box2d<double>;
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group_layout_manager()
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: update_layout_(false)
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{}
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explicit group_layout_manager(group_layout const& layout)
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: layout_(layout),
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update_layout_(false)
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{}
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group_layout_manager(group_layout const& layout, pixel_position const& input_origin)
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: layout_(layout),
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input_origin_(input_origin),
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update_layout_(false)
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{}
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group_layout_manager(group_layout const& layout,
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pixel_position const& input_origin,
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std::vector<bound_box> const& item_boxes)
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: layout_(layout),
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input_origin_(input_origin),
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member_boxes_(item_boxes),
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update_layout_(true)
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{}
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void set_input_origin(double x, double y)
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{
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input_origin_.set(x, y);
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update_layout_ = true;
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}
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void set_input_origin(pixel_position const& input_origin)
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{
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input_origin_ = input_origin;
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update_layout_ = true;
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}
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inline void set_layout(group_layout const& layout)
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{
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layout_ = layout;
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update_layout_ = true;
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}
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inline void add_member_bound_box(bound_box const& member_box)
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{
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member_boxes_.push_back(member_box);
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update_layout_ = true;
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}
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inline pixel_position const& offset_at(size_t i)
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{
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handle_update();
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return member_offsets_.at(i);
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}
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bound_box offset_box_at(size_t i);
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private:
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void handle_update();
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group_layout layout_;
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pixel_position input_origin_;
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std::vector<bound_box> member_boxes_;
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std::vector<pixel_position> member_offsets_;
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bool update_layout_;
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};
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} // namespace mapnik
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#endif // MAPNIK_GROUP_LAYOUT_MANAGER_HPP
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