Last change
on this file since 10456 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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[4271] | 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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[9383] | 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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[4271] | 28 | \note The implementation uses high-resolution performance counter on Windows,
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[9383] | 29 | mach_absolute_time() on the Mac or POSIX timers on other systems.
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[4271] | 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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