text: /*
   * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include <LibGUI/Widget.h>
  
  namespace GUI {
  
  class BreadcrumbBar : public GUI::Widget {
      C_OBJECT(BreadcrumbBar);
  
  public:
      virtual ~BreadcrumbBar() override;
  
      void clear_segments();
      void append_segment(const String& text, const Gfx::Bitmap* icon = nullptr, const String& data = {});
  
      size_t segment_count() const { return m_segments.size(); }
      String segment_data(size_t index) const { return m_segments[index].data; }
  
      void set_selected_segment(Optional<size_t> index);
      Optional<size_t> selected_segment() const { return m_selected_segment; }
  
      Function<void(size_t index)> on_segment_click;
      Function<void(size_t index, DropEvent&)> on_segment_drop;
      Function<void(size_t index, DragEvent&)> on_segment_drag_enter;
  
  private:
      BreadcrumbBar();
  
      struct Segment {
          RefPtr<const Gfx::Bitmap> icon;
          String text;
          String data;
          WeakPtr<GUI::Button> button;
      };
  
      Vector<Segment> m_segments;
      Optional<size_t> m_selected_segment;
  };
  
  }
  