text: #pragma once
  
  #include <LibGUI/GFrame.h>
  
  class GScrollBar;
  
  class GScrollableWidget : public GFrame {
      C_OBJECT(GScrollableWidget)
  public:
      virtual ~GScrollableWidget() override;
  
      Size content_size() const { return m_content_size; }
      int content_width() const { return m_content_size.width(); }
      int content_height() const { return m_content_size.height(); }
  
      Rect visible_content_rect() const;
  
      Rect widget_inner_rect() const;
  
      void scroll_into_view(const Rect&, Orientation);
      void scroll_into_view(const Rect&, bool scroll_horizontally, bool scroll_vertically);
  
      void set_scrollbars_enabled(bool);
      bool is_scrollbars_enabled() const { return m_scrollbars_enabled; }
  
      Size available_size() const;
  
      GScrollBar& vertical_scrollbar() { return *m_vertical_scrollbar; }
      const GScrollBar& vertical_scrollbar() const { return *m_vertical_scrollbar; }
      GScrollBar& horizontal_scrollbar() { return *m_horizontal_scrollbar; }
      const GScrollBar& horizontal_scrollbar() const { return *m_horizontal_scrollbar; }
      GWidget& corner_widget() { return *m_corner_widget; }
      const GWidget& corner_widget() const { return *m_corner_widget; }
  
      void scroll_to_top();
      void scroll_to_bottom();
  
      int width_occupied_by_vertical_scrollbar() const;
      int height_occupied_by_horizontal_scrollbar() const;
  
      void set_should_hide_unnecessary_scrollbars(bool b) { m_should_hide_unnecessary_scrollbars = b; }
      bool should_hide_unnecessary_scrollbars() const { return m_should_hide_unnecessary_scrollbars; }
  
      Point to_content_position(const Point& widget_position) const;
      Point to_widget_position(const Point& content_position) const;
  
  protected:
      explicit GScrollableWidget(GWidget* parent);
      virtual void custom_layout() override;
      virtual void resize_event(GResizeEvent&) override;
      virtual void mousewheel_event(GMouseEvent&) override;
      virtual void did_scroll() {}
      void set_content_size(const Size&);
      void set_size_occupied_by_fixed_elements(const Size&);
  
  private:
      void update_scrollbar_ranges();
  
      RefPtr<GScrollBar> m_vertical_scrollbar;
      RefPtr<GScrollBar> m_horizontal_scrollbar;
      RefPtr<GWidget> m_corner_widget;
      Size m_content_size;
      Size m_size_occupied_by_fixed_elements;
      bool m_scrollbars_enabled { true };
      bool m_should_hide_unnecessary_scrollbars { false };
  };
  