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      #ifndef CHARTHELPERS_P_H

      #define CHARTHELPERS_P_H

      #include <qnumeric.h>

      #include <QPointF>

      static inline bool isValidValue(qreal value)

      {

          if (qIsNaN(value) || qIsInf(value)) {

              qWarning("Ignored NaN, Inf, or -Inf value.");

              return false;

          }

          return true;

      }

      static inline bool isValidValue(qreal x, qreal y)

      {

          return (isValidValue(x) && isValidValue(y));

      }

      static inline bool isValidValue(const QPointF point)

      {

          return (isValidValue(point.x()) && isValidValue(point.y()));

      }

      #endif // CHARTHELPERS_P_H

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				#ifndef CHARTHELPERS_P_H
				#define CHARTHELPERS_P_H

				#include <qnumeric.h>
				#include <QPointF>

				static inline bool isValidValue(qreal value)
				{
				if (qIsNaN(value) \|\| qIsInf(value)) {
				qWarning("Ignored NaN, Inf, or -Inf value.");
				return false;
				}
				return true;
				}

				static inline bool isValidValue(qreal x, qreal y)
				{
				return (isValidValue(x) && isValidValue(y));
				}

				static inline bool isValidValue(const QPointF point)
				{
				return (isValidValue(point.x()) && isValidValue(point.y()));
				}

				#endif // CHARTHELPERS_P_H