GraphicsLinesForCurve.h

/******************************************************************************************************
 * (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_LINES_FOR_CURVE_H
#define GRAPHICS_LINES_FOR_CURVE_H
 
#include "Point.h"
#include "OrdinalToGraphicsPoint.h"
#include <QGraphicsPathItem>
 
class CurveStyle;
class GraphicsPoint;
class GraphicsScene;
class LineStyle;
class PointStyle;
class QTestStream;
class Transformation;
 
class GraphicsLinesForCurve : public QGraphicsPathItem
{
public:
  GraphicsLinesForCurve(const QString &curveName);
  ~GraphicsLinesForCurve();
 
  void addPoint (const QString &pointIdentifier,
                 double ordinal,
                 GraphicsPoint &point);
 
  double identifierToOrdinal (const QString &identifier) const;
 
  void lineMembershipPurge (const LineStyle &lineStyle);
 
  void lineMembershipReset ();
 
  void printStream (QString indentation,
                    QTextStream &str) const;
 
  void removePoint (double ordinal);
 
  void removeTemporaryPointIfExists ();
 
  void updateAfterCommand (GraphicsScene &scene,
                           const PointStyle &pointStyle,
                           const Point &point);
 
  void updateCurveStyle (const CurveStyle &curveStyle);
 
  void updateGraphicsLinesToMatchGraphicsPoints (const LineStyle &lineStyle);
 
  void updatePointOrdinalsAfterDrag (const LineStyle &lineStyle,
                                     const Transformation &transformation);
 
private:
 
  QPainterPath drawLinesSmooth ();
  QPainterPath drawLinesStraight ();
  bool needOrdinalRenumbering () const; // True if m_graphicsPoints ordinal keys need renumbering
  void renumberOrdinals(); // Renumbers m_graphicsPoints ordinal keys
 
  const QString m_curveName;
  OrdinalToGraphicsPoint m_graphicsPoints;
};
 
#endif // GRAPHICS_LINES_FOR_CURVE_H