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33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/******************************************************************************
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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() QWT_OVERRIDE;
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/*!
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Collect a sample
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\param elapsed Time since the thread was started in seconds
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\note Due to a bug in previous version elapsed was passed as
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seconds instead of miliseconds. To avoid breaking existing
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code we stay with seconds for now.
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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* m_data;
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};
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#endif
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