36 lines
733 B
C
36 lines
733 B
C
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#ifndef _CIRCULAR_BUFFER_H_
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#define _CIRCULAR_BUFFER_H_
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#include <qwt_series_data.h>
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#include <qvector.h>
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class CircularBuffer: public QwtSeriesData<QPointF>
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{
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public:
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CircularBuffer( double interval = 10.0, size_t numPoints = 1000 );
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void fill( double interval, size_t numPoints );
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void setReferenceTime( double );
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double referenceTime() const;
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virtual size_t size() const;
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virtual QPointF sample( size_t i ) const;
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virtual QRectF boundingRect() const;
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void setFunction( double( *y )( double ) );
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private:
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double ( *d_y )( double );
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double d_referenceTime;
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double d_interval;
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QVector<double> d_values;
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double d_step;
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int d_startIndex;
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double d_offset;
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};
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#endif
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