60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef _QWT_SAMPLING_THREAD_H_
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#define _QWT_SAMPLING_THREAD_H_
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#include "qwt_global.h"
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#include <qthread.h>
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/*!
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\brief A thread collecting samples at regular intervals.
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Continuous signals are converted into a discrete signal by
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collecting samples at regular intervals. A discrete signal
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can be displayed by a QwtPlotSeriesItem on a QwtPlot widget.
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QwtSamplingThread starts a thread calling periodically sample(),
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to collect and store ( or emit ) a single sample.
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\sa QwtPlotCurve, QwtPlotSeriesItem
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*/
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class QWT_EXPORT QwtSamplingThread: public QThread
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{
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Q_OBJECT
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public:
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virtual ~QwtSamplingThread();
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double interval() const;
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double elapsed() const;
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public Q_SLOTS:
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void setInterval( double interval );
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void stop();
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protected:
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explicit QwtSamplingThread( QObject *parent = NULL );
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virtual void run();
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/*!
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Collect a sample
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\param elapsed Time since the thread was started in milliseconds
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*/
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virtual void sample( double elapsed ) = 0;
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private:
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class PrivateData;
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PrivateData *d_data;
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};
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#endif
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