QGraphicsKnob.hpp

#pragma once
#include <score/graphics/widgets/Constants.hpp>
 
#include <QGraphicsItem>
#include <QObject>
 
#include <score_lib_base_export.h>
 
#include <verdigris>
 
namespace score
{
class SCORE_LIB_BASE_EXPORT QGraphicsKnob
    : public QObject
    , public QGraphicsItem
{
  W_OBJECT(QGraphicsKnob)
  Q_INTERFACES(QGraphicsItem)
  friend struct DefaultGraphicsKnobImpl;
 
protected:
  double m_value{};
  double m_execValue{};
  QRectF m_rect{defaultKnobSize};
 
public:
  double min{}, max{};
 
private:
  bool m_grab{};
  bool m_hasExec{};
 
public:
  QGraphicsKnob(QGraphicsItem* parent);
 
  double unmap(double v) const noexcept { return (v - min) / (max - min); }
  double map(double v) const noexcept { return (v * (max - min)) + min; }
 
  void setRect(const QRectF& r);
  void setRange(double min, double max);
  void setValue(double v);
  double value() const;
  void setExecutionValue(double v);
  void resetExecution();
 
  QRectF boundingRect() const override;
 
  bool moving = false;
 
public:
  void sliderMoved() E_SIGNAL(SCORE_LIB_BASE_EXPORT, sliderMoved)
  void sliderReleased() E_SIGNAL(SCORE_LIB_BASE_EXPORT, sliderReleased)
 
private:
  void mousePressEvent(QGraphicsSceneMouseEvent* event) override;
  void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;
  void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;
  void contextMenuEvent(QGraphicsSceneContextMenuEvent* event) override;
  void mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event) override;
 
  void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
      override;
};
}