scroll_view.h

// Copyright...

#ifndef PDFSKETCH_SCROLL_VIEW_H__
#define PDFSKETCH_SCROLL_VIEW_H__

#include "scroll_bar_view.h"
#include "view.h"

namespace pdfsketch {

class ScrollView : public View,
                   public ScrollBarDelegate,
                   public ViewDelegate {
 public:
  ScrollView();
  virtual std::string Name() const { return "ScrollView"; }
  // Adds document as a subview of this:
  void SetDocumentView(View* document);
  void MoveDocPointToVisibleCenter(const Point& center);

  virtual void Resize(const Size& size);

  // ScrollBarDelegate method:
  virtual void ScrollBarMovedTo(ScrollBarView* scroll_bar, double show_min);

  // ViewDelegate method
  virtual void ViewFrameChanged(View* view, const Rect& frame,
                                const Rect& old_frame);

  virtual void OnScrollEvent(const ScrollInputEvent& event);

 private:
  void RepositionSubviews();

  View* document_{nullptr};
  Point doc_visible_center_;
  Size doc_size_;
  bool handling_doc_frame_changed_{false};
  ScrollBarView h_scroller_{false};
  bool h_visible_{false};
  ScrollBarView v_scroller_{true};
  bool v_visible_{false};

  View clip_view_;
};

}  // namespace pdfsketch

#endif  // PDFSKETCH_SCROLL_VIEW_H__