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Qwt User's Guide
6.1.6
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QwtSystemClock provides high resolution clock time functions. More...
#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 |
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( QwtSystemClock is obsolete since Qt 4.8 as QElapsedTimer offers the same precision )
| double QwtSystemClock::elapsed | ( | ) | const |
| bool QwtSystemClock::isNull | ( | ) | const |
| double QwtSystemClock::restart | ( | ) |
Set the start time to the current time
| void QwtSystemClock::start | ( | ) |
Sets the start time to the current time.