qwtsamplingthread(3) [debian man page]

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)

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

NAME

       QwtPlotSeriesItem -

       Class template for plot items representing a series of samples.

SYNOPSIS

       #include <qwt_plot_seriesitem.h>

       Inherits QwtPlotAbstractSeriesItem.

   Public Member Functions
       QwtPlotSeriesItem (const QString &title=QString::null)
       QwtPlotSeriesItem (const QwtText &title)
       virtual ~QwtPlotSeriesItem ()
       void setData (QwtSeriesData< T > *)
       QwtSeriesData< T > * data ()
       const QwtSeriesData< T > * data () const
       size_t dataSize () const
       T sample (int index) const
       virtual QRectF boundingRect () const
       virtual void updateScaleDiv (const QwtScaleDiv &, const QwtScaleDiv &)

   Protected Attributes
       QwtSeriesData< T > * d_series

Detailed Description
   template<typename T> class QwtPlotSeriesItem< T >
       Class template for plot items representing a series of samples.

Constructor &; Destructor Documentation
   template<typename T > QwtPlotSeriesItem< T >::QwtPlotSeriesItem (const QString &title = QString::null) [explicit] Constructor
       Parameters:
	   title Title of the series item

   template<typename T > QwtPlotSeriesItem< T >::QwtPlotSeriesItem (const QwtText &title) [explicit] Constructor
       Parameters:
	   title Title of the series item

   template<typename T > QwtPlotSeriesItem< T >::~QwtPlotSeriesItem () [virtual]
       Destructor.

Member Function Documentation
   template<typename T > QRectF QwtPlotSeriesItem< T >::boundingRect () const [virtual] Returns:
	   Bounding rectangle of the data. If there is no bounding rect, like for empty data the rectangle is invalid.

       See also:
	   QwtSeriesData<T>::boundingRect(), QRectF::isValid()

       Reimplemented from QwtPlotItem.

       Reimplemented in QwtPlotHistogram, and QwtPlotIntervalCurve.

   template<typename T > QwtSeriesData< T > * QwtPlotSeriesItem< T >::data () [inline] Returns:
	   the the curve data

   template<typename T > const QwtSeriesData< T > * QwtPlotSeriesItem< T >::data () const [inline] Returns:
	   the the curve data

   template<typename T > size_t QwtPlotSeriesItem< T >::dataSize () const Return the size of the data arrays
       See also:
	   setData()

   template<typename T > T QwtPlotSeriesItem< T >::sample (intindex) const [inline] Parameters:
	   index Index

       Returns:
	   Sample at position index

   template<typename T> void QwtPlotSeriesItem< T >::setData (QwtSeriesData< T > *data) Assign a series of samples
       Parameters:
	   data Data

       Warning:
	   The item takes ownership of the data object, deleting it when its not used anymore.

   template<typename T > void QwtPlotSeriesItem< T >::updateScaleDiv (const QwtScaleDiv &xScaleDiv, const QwtScaleDiv &yScaleDiv) [virtual] Update
       the rect of interest according to the current scale ranges
       Parameters:
	   xScaleDiv Scale division of the x-axis
	   yScaleDiv Scale division of the y-axis

       See also:
	   QwtSeriesData<T>::setRectOfInterest()

       Reimplemented from QwtPlotItem.

Member Data Documentation
   template<typename T> QwtSeriesData<T>* QwtPlotSeriesItem< T >::d_series [protected]
       Series.

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

Version 6.0.0							  Fri Apr 15 2011					      QwtPlotSeriesItem(3)