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#ifndef _QWT_SAMPLING_THREAD_H_
#define _QWT_SAMPLING_THREAD_H_
#include "qwt_global.h"
#include <qthread.h>
/*!
\brief A thread collecting samples at regular intervals.
Continuous signals are converted into a discrete signal by
collecting samples at regular intervals. A discrete signal
can be displayed by a QwtPlotSeriesItem on a QwtPlot widget.
QwtSamplingThread starts a thread calling periodically sample(),
to collect and store ( or emit ) a single sample.
\sa QwtPlotCurve, QwtPlotSeriesItem
*/
class QWT_EXPORT QwtSamplingThread: public QThread
{
Q_OBJECT
public:
virtual ~QwtSamplingThread();
double interval() const;
double elapsed() const;
public Q_SLOTS:
void setInterval( double interval );
void stop();
protected:
explicit QwtSamplingThread( QObject *parent = NULL );
virtual void run();
/*!
Collect a sample
\param elapsed Time since the thread was started in milliseconds
*/
virtual void sample( double elapsed ) = 0;
private:
class PrivateData;
PrivateData *d_data;
};
#endif