connectionPoint.hh

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#ifndef VSI_CONNECTIONPOINT_HH
#define VSI_CONNECTIONPOINT_HH

//== INCLUDES =================================================================
#include <QGraphicsItem>
#include <QGraphicsLayoutItem>
#include <QGraphicsSceneMouseEvent>
#include <QString>
#include <QTimer>
#include <QPointF>

//== NAMESPACES ===============================================================
namespace VSI {

//== FORWARDDECLARATIONS ======================================================
class GraphicsScene;
class ElementInOut;

//== CLASS DEFINITION =========================================================

class ConnectionPoint : public QObject, public QGraphicsEllipseItem, public QGraphicsLayoutItem
{
  Q_OBJECT
  Q_INTERFACES(QGraphicsLayoutItem)

  public:

    enum State {
      NoValue = 0,
      Optional = 1,
      RuntimeInput = 2,
      UserInput = 3,
      Connected = 4,
      OutputNotConnected = 5
    };

    ConnectionPoint (ElementInOut *_e, QGraphicsItem *_parent);

    ~ConnectionPoint ();

    ElementInOut *inOut () const { return inout_; };

    QPointF connectPos ();

    virtual void setGeometry (const QRectF &_rect);

    void setState (State _state);

    void setWidth (int _width);

    // painting
    void paint (QPainter *_painter, const QStyleOptionGraphicsItem *_option, QWidget *_widget = 0);

  protected:

    // start a new connection on press
    void mousePressEvent (QGraphicsSceneMouseEvent *_event);

    // highlight connection if mouse over
    void hoverEnterEvent (QGraphicsSceneHoverEvent *_event);
    void hoverLeaveEvent (QGraphicsSceneHoverEvent *_event);

    // size informations for layouting
    virtual QSizeF sizeHint ( Qt::SizeHint _which, const QSizeF & _constraint = QSizeF()) const;

  private:

    ElementInOut *inout_;

    int width_;
};

}

#endif