SchemaGraphicSegmentedArrow.hpp

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#ifndef SchemaGraphicSegmentedArrow_H
#define SchemaGraphicSegmentedArrow_H
 
#include <QGraphicsPathItem>
#include "dbe/SchemaGraphicObject.hpp"
#include "dbe/SchemaGraphicsScene.hpp"
 
namespace dbse
{
 
class SchemaGraphicSegmentedArrow: public QGraphicsPathItem
{
public:
  SchemaGraphicSegmentedArrow ( SchemaGraphicObject * StartItem, SchemaGraphicObject * EndItem,
                                int connection_count,
                       bool IsInheritance, bool IsComposite, QString ArrowName,
                       QString ArrowCardinality, QGraphicsItem * parent = nullptr );
  ~SchemaGraphicSegmentedArrow();
  QRectF boundingRect() const;
  QPainterPath shape() const;
  void UpdatePosition();
  SchemaGraphicObject * GetStartItem() const;
  SchemaGraphicObject * GetEndItem() const;
  bool GetInheritanceMode();
  void RemoveArrow();
protected:
  void paint ( QPainter * painter, const QStyleOptionGraphicsItem * option,
               QWidget * widget = 0 );
  void hoverEnterEvent ( QGraphicsSceneHoverEvent* ev );
  void hoverLeaveEvent ( QGraphicsSceneHoverEvent* ev );
private:
 
  QPointF p1() const { return path().elementCount() > 0 ? path().elementAt(0) : QPointF(); }
  QPointF p2() const { return path().elementCount() > 0 ? path().elementAt(path().elementCount()-1) : QPointF(); }
  qreal dx() const { return p2().x() - p1().x(); } 
  qreal dy() const { return p2().y() - p1().y(); } 
 
  QPolygonF make_arrow_head(qreal angle) const;
  QPolygonF make_rhombus(qreal angle) const;
 
  SchemaGraphicObject * m_start_item;
  SchemaGraphicObject * m_end_item;
  int m_connection_count;
  QPolygonF m_marker;
  QRectF m_rel_label_br;
  QRectF m_rel_cardinality_br;
  bool m_inheritance;
  bool m_composite;
  QString m_name;
  QString m_cardinality;
  QColor m_default_color;
  QFont m_label_font;
  qreal m_arrow_size;
 
  double LastDegree;
  double LastRotation;
  //QString LabelString;
};
 
}  // namespace dbse
#endif // SchemaGraphicSegmentedArrow_H