qwtsystemclock(3) [debian man page]

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

NAME

       QwtSystemClock -

       QwtSystemClock provides high resolution clock time functions.

SYNOPSIS

       #include <qwt_system_clock.h>

   Public Member Functions
       QwtSystemClock ()
       virtual ~QwtSystemClock ()
       bool isNull () const
       void start ()
       double restart ()
       double elapsed () const

   Static Public Member Functions
       static double precision ()

Detailed Description
       QwtSystemClock provides high resolution clock time functions.

       Sometimes the resolution offered by QTime ( millisecond ) is not accurate enough for implementing time measurements ( f.e. sampling ).
       QwtSystemClock offers a subset of the QTime functionality using higher resolution timers ( if possible ).

       Precision and time intervals are multiples of milliseconds (ms).

       Note:
	   The implementation uses high-resolution performance counter on Windows, mach_absolute_time() on the Mac or POSIX timers on other
	   systems. If none is available it falls back on QTimer.

Constructor &; Destructor Documentation
   QwtSystemClock::QwtSystemClock ()
       Constructs a null clock object.

   QwtSystemClock::~QwtSystemClock () [virtual]
       Destructor.

Member Function Documentation
   double QwtSystemClock::elapsed () const Returns:
	   Number of milliseconds that have elapsed since the last time start() or restart() was called or 0.0 for null clocks.

   bool QwtSystemClock::isNull () const Returns:
	   true if the clock has never been started.

   double QwtSystemClock::precision () [static] Returns:
	   Accuracy of the system clock in milliseconds.

   double QwtSystemClock::restart () The start time to the current time and return the time, that is elapsed since the previous start time.
   void QwtSystemClock::start () Sets the start time to the current time.
Author
       Generated automatically by Doxygen for Qwt User's Guide from the source code.

Version 6.0.0							  Fri Apr 15 2011						 QwtSystemClock(3)

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

NAME

       QwtIntervalData -

       Series of samples of a value and an interval.

SYNOPSIS

       #include <qwt_interval_data.h>

   Public Member Functions
       QwtDoubleRect boundingRect () const
       const QwtDoubleInterval & interval (size_t i) const
       QwtIntervalData (const QwtArray< QwtDoubleInterval > &, const QwtArray< double > &)
       QwtIntervalData ()
       void setData (const QwtArray< QwtDoubleInterval > &, const QwtArray< double > &)
       size_t size () const
       double value (size_t i) const
       ~QwtIntervalData ()

Detailed Description
       Series of samples of a value and an interval.

       QwtIntervalData is a series of samples of a value and an interval. F.e. error bars are built from samples [x, y1-y2], while a histogram
       might consist of [x1-x2, y] samples.

Constructor &; Destructor Documentation
   QwtIntervalData::QwtIntervalData ()
       Constructor.

   QwtIntervalData::QwtIntervalData (const QwtArray< QwtDoubleInterval > &intervals, const QwtArray< double > &values)
       Constructor.

   QwtIntervalData::~QwtIntervalData ()
       Destructor.

Member Function Documentation
   QwtDoubleRect QwtIntervalData::boundingRect () const Calculate the bounding rectangle of the samples
       The x coordinates of the rectangle are built from the intervals, the y coordinates from the values.

       Returns:
	   Bounding rectangle

   const QwtDoubleInterval & QwtIntervalData::interval (size_ti) const [inline] Interval of a sample
       Parameters:
	   i Sample index

       Returns:
	   Interval

       See also:
	   value(), size()

   void QwtIntervalData::setData (const QwtArray< QwtDoubleInterval > &intervals, const QwtArray< double > &values)
       Assign samples.

   size_t QwtIntervalData::size () const [inline] Returns:
	   Number of samples

   double QwtIntervalData::value (size_ti) const [inline] Value of a sample
       Parameters:
	   i Sample index

       Returns:
	   Value

       See also:
	   interval(), size()

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

Version 5.2.2							  Mon Aug 1 2011						QwtIntervalData(3)