text: /**
   * The MIT License (MIT)
   *
   * Copyright © 2018-2020 Ruben Van Boxem
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   **/
  
  #include "layout.h++"
  
  #include <algorithm>
  #include <utility>
  
  namespace skui::gui
  {
    layout::~layout() = default;
  
    layout::layout(element_ptrs children)
      : children{std::move(children)}
      , spacing{0}
    {
      spacing.value_changed.connect(this, &element::invalidate);
    }
  
    void layout::draw(graphics::canvas& canvas, const graphics::scalar_position& position) const
    {
      auto child_offsets = calculate_child_offsets(canvas);
      const auto padded_position = position + graphics::scalar_position{padding.left, padding.right};
      std::for_each(child_offsets.begin(), child_offsets.end(),
                    [&padded_position](auto& offset) { offset += padded_position; });
  
      for(std::size_t i = 0; i < children.size(); ++i)
      {
        children[i]->draw(canvas, child_offsets[i]);
      }
    }
  }
  