GraphicsPoint.h

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/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#ifndef GRAPHICS_POINT_H
#define GRAPHICS_POINT_H
 
#include "GraphicsPointAbstractBase.h"
#include <QColor>
#include <QPointF>
#include <QRectF>
 
extern const double DEFAULT_HIGHLIGHT_OPACITY;
extern const double MAX_OPACITY;
 
class CurveStyle;
class GeometryWindow;
class GraphicsPointEllipse;
class GraphicsPointPolygon;
class PointStyle;
class QColor;
class QGraphicsScene;
class QPolygonF;
class QTextStream;
class QVariant;
 
class GraphicsPoint : public GraphicsPointAbstractBase
{
public:
  GraphicsPoint(QGraphicsScene &scene,
                const QString &identifier,
                const QPointF &posScreen,
                const QColor &color,
                unsigned int radius,
                double lineWidth,
                GeometryWindow *geometryWindow);
 
  GraphicsPoint(QGraphicsScene &scene,
                const QString &identifier,
                const QPointF &posScreen,
                const QColor &color,
                const QPolygonF &polygon,
                double lineWidth,
                GeometryWindow *geometryWindow);
 
  ~GraphicsPoint ();
 
  QRectF boundingRect () const;
 
  QVariant data (int key) const;
 
  double highlightOpacity () const;
 
  QPointF pos () const;
 
  void printStream (QString indentation,
                    QTextStream &str,
                    double ordinalKey) const;
 
  void reset();
 
  void setData (int key, const QVariant &data);
 
  void setHighlightOpacity (double highlightOpacity);
 
  void setPointStyle (const PointStyle &pointStyle);
 
  void setPos (const QPointF pos);
 
  void setPassive ();
 
  void setWanted ();
 
  void updateCurveStyle (const CurveStyle &curveStyle);
 
  bool wanted () const;
 
private:
  GraphicsPoint();
 
  void createPointEllipse (unsigned int radius); // Attributes shared by circle and polygon points are passed through member variables
  void createPointPolygon (const QPolygonF &polygon); // Attributes shared by circle and polygon points are passed through member variables
 
  QGraphicsScene &m_scene;
 
  // Ellipse graphics items. Unused if point is polygonal.
  GraphicsPointEllipse *m_graphicsItemEllipse;
  GraphicsPointEllipse *m_shadowZeroWidthEllipse; // Shadow item overlays the superclass instance to ensure visibility
 
  // Polygon graphics items. Unused if point is elliptical.
  GraphicsPointPolygon *m_graphicsItemPolygon;
  GraphicsPointPolygon *m_shadowZeroWidthPolygon; // Shadow item overlays the superclass instance to ensure visibility
 
  // Shared attributes
  const QString m_identifier;
  const QPointF m_posScreen;
  const QColor m_color;
  double m_lineWidth;
 
  // Housekeeping
  bool m_wanted;
 
  double m_highlightOpacity;
 
  GeometryWindow *m_geometryWindow; // Can receive hover signals. Null if unused
};
 
#endif // GRAPHICS_POINT_H