QwtSamplingThread(3)						 Qwt User's Guide					      QwtSamplingThread(3)

NAME

       QwtSamplingThread -

       A thread collecting samples at regular intervals.

SYNOPSIS

       #include <qwt_sampling_thread.h>

   Public Slots
       void setInterval (double interval)
       void stop ()

   Public Member Functions
       virtual ~QwtSamplingThread ()
       double interval () const
       double elapsed () const

   Protected Member Functions
       QwtSamplingThread (QObject *parent=NULL)
       virtual void run ()
       virtual void sample (double elapsed)=0

Detailed Description
       A thread collecting samples at regular intervals.

       Contiounous 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 perodically sample(), to collect and store ( or emit ) a single sample.

       See also:
	   QwtPlotCurve, QwtPlotSeriesItem

Constructor &; Destructor Documentation
   QwtSamplingThread::~QwtSamplingThread () [virtual]
       Destructor.

   QwtSamplingThread::QwtSamplingThread (QObject *parent = NULL) [explicit, protected]
       Constructor.

Member Function Documentation
   double QwtSamplingThread::elapsed () const Returns:
	   Time (in ms) since the thread was started

       See also:
	   QThread::start(), run()

   double QwtSamplingThread::interval () const Returns:
	   Interval (in ms), between 2 calls of sample()

       See also:
	   setInterval()

   void QwtSamplingThread::run () [protected, virtual] Loop collecting samples started from QThread::start()
       See also:
	   stop()

   virtual void QwtSamplingThread::sample (doubleelapsed) [protected, pure virtual] Collect a sample
       Parameters:
	   elapsed Time since the thread was started in miliseconds

   void QwtSamplingThread::setInterval (doubleinterval) [slot] Change the interval (in ms), when sample() is called. The default interval is
       1000.0 ( = 1s )
       Parameters:
	   interval Interval

       See also:
	   interval()

   void QwtSamplingThread::stop () [slot] Terminate the collecting thread
       See also:
	   QThread::start(), run()

Author
       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 6.0.0							  Fri Apr 15 2011					      QwtSamplingThread(3)