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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 ()
Constructs a null clock object. virtual ~QwtSystemClock ()
Destructor. bool isNull () const
void start ()
double restart ()
double elapsed () const
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).
( QwtSystemClock is obsolete since Qt 4.8 as QElapsedTimer offers the same precision )
Note:
Member Function Documentation¶
double QwtSystemClock::elapsed () const¶
Returns:
bool QwtSystemClock::isNull () const¶
Returns:
double QwtSystemClock::restart ()¶
Set the start time to the current time
Returns:
void QwtSystemClock::start ()¶
Sets the start time to the current time.
Author¶
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Wed Jan 2 2019 | Version 6.1.4 |