Released version 6.1.3

examples/refreshtest/circularbuffer.h

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