Last change
on this file since 10490 was 9383, checked in by stoecker, 4 years ago |
update to qwt verion 6.1.1 to fix build with newer Qt5
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File size:
1.4 KB
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1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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2 | * Qwt Widget Library
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3 | * Copyright (C) 1997 Josef Wilgen
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4 | * Copyright (C) 2002 Uwe Rathmann
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5 | *
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6 | * This library is free software; you can redistribute it and/or
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7 | * modify it under the terms of the Qwt License, Version 1.0
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8 | *****************************************************************************/
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9 |
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10 | #ifndef QWT_SYSTEM_CLOCK_H
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11 | #define QWT_SYSTEM_CLOCK_H
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12 |
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13 | #include "qwt_global.h"
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14 |
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15 | /*!
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16 | \brief QwtSystemClock provides high resolution clock time functions.
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17 |
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18 | Sometimes the resolution offered by QTime ( millisecond ) is not accurate
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19 | enough for implementing time measurements ( f.e. sampling ).
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20 | QwtSystemClock offers a subset of the QTime functionality using higher
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21 | resolution timers ( if possible ).
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22 |
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23 | Precision and time intervals are multiples of milliseconds (ms).
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24 |
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25 | ( QwtSystemClock is obsolete since Qt 4.8 as QElapsedTimer offers the same
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26 | precision )
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27 |
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28 | \note The implementation uses high-resolution performance counter on Windows,
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29 | mach_absolute_time() on the Mac or POSIX timers on other systems.
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30 | If none is available it falls back on QTimer.
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31 | */
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32 |
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33 | class QWT_EXPORT QwtSystemClock
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34 | {
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35 | public:
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36 | QwtSystemClock();
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37 | virtual ~QwtSystemClock();
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38 |
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39 | bool isNull() const;
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40 |
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41 | void start();
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42 | double restart();
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43 | double elapsed() const;
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44 |
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45 | private:
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46 | class PrivateData;
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47 | PrivateData *d_data;
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48 | };
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49 |
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50 | #endif
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