MidiView.hpp

#pragma once
#include <Process/LayerView.hpp>
 
#include <Midi/MidiProcess.hpp>
 
#include <QPainter>
#include <QPainterPath>
 
#include <verdigris>
 
namespace Midi
{
class NoteView;
class SCORE_PLUGIN_MIDI_EXPORT View final : public Process::LayerView
{
  W_OBJECT(View)
public:
  View(QGraphicsItem* parent);
 
  ~View() override;
  double defaultWidth() const noexcept { return m_defaultW; }
  void setDefaultWidth(double w);
 
  void setRange(int, int);
  std::pair<int, int> range() const { return {m_min, m_max}; }
  NoteData noteAtPos(QPointF point) const;
  int visibleCount() const;
 
public:
  void deleteRequested() W_SIGNAL(deleteRequested);
  void transposeRequested(int semitones) W_SIGNAL(transposeRequested, semitones);
 
private:
  bool canEdit() const;
  void paint_impl(QPainter*) const override;
  void heightChanged(qreal h) override;
  void widthChanged(qreal w) override;
  void mousePressEvent(QGraphicsSceneMouseEvent*) override;
  void mouseMoveEvent(QGraphicsSceneMouseEvent*) override;
  void mouseReleaseEvent(QGraphicsSceneMouseEvent*) override;
  void mouseDoubleClickEvent(QGraphicsSceneMouseEvent*) override;
  void keyPressEvent(QKeyEvent*) override;
  void dropEvent(QGraphicsSceneDragDropEvent* event) override;
 
  void updateBackground(double height);
 
  QPainterPath m_selectArea;
  double m_defaultW; // Covers the [ 0; 1 ] area
  int m_min{0}, m_max{127};
 
  QPixmap m_textCache;
  QPixmap m_bgCache;
 
  mutable std::vector<QPainter::PixmapFragment> m_fragmentCache;
};
}