transition.h

#pragma once
 
#include <QGraphicsLineItem>
#include <QGraphicsPathItem>
 
#include "ids.h"
 
class NodeItem;
class TransitionSaveInfo;

class TransitionItem : public QGraphicsPathItem
{
public:
  enum class Edge
  {
    NONE = 0,  
    FORWARD,   
    BACKWARD,  
    ARC        
  };

  TransitionItem(std::shared_ptr<TransitionSaveInfo> storage);

  virtual ~TransitionItem();

  QString id() const;

  int type() const override;

  void setStart(const QString& id, const QPointF& point, const QPointF& controlShift);

  void setEnd(const QString& id, const QPointF& point, const QPointF& controlShift);

  void done(NodeItem* source, NodeItem* destination);

  NodeItem* source() const;

  NodeItem* destination() const;

  void move(const QString& id, QPointF pos);

  void updatePath(QPainterPath painterPath = {});

  void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) override;

  QPainterPath shape() const override;

  TransitionSaveInfo saveInfo() const;

  std::shared_ptr<TransitionSaveInfo> storage() const;

  QString getName() const;

  void setName(const QString& name);

  QString getEvent() const;

  void setEvent(const QString& name);

  void setEdge(Edge edge);
 
  // "signals":
  std::function<void(TransitionItem* item)> transitionDeleted;   
  std::function<void(TransitionItem* item)> transitionModified;  
 
private:
  const QString mId;  
  bool mComplete;     
 
  Edge mEdge = Edge::NONE;  
 
  NodeItem* mSource;       
  NodeItem* mDestination;  
 
  QGraphicsTextItem* mLabel = nullptr;           
  std::shared_ptr<TransitionSaveInfo> mStorage;  
 
  void updateLabelPosition();  
};