source: ntrip/trunk/BNC/qwt/qwt_date_scale_engine.h@ 10298

Last change on this file since 10298 was 9383, checked in by stoecker, 4 years ago

update to qwt verion 6.1.1 to fix build with newer Qt5

File size: 2.6 KB
Line 
1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10#ifndef _QWT_DATE_SCALE_ENGINE_H_
11#define _QWT_DATE_SCALE_ENGINE_H_ 1
12
13#include "qwt_date.h"
14#include "qwt_scale_engine.h"
15
16/*!
17 \brief A scale engine for date/time values
18
19 QwtDateScaleEngine builds scales from a time intervals.
20 Together with QwtDateScaleDraw it can be used for
21 axes according to date/time values.
22
23 Years, months, weeks, days, hours and minutes are organized
24 in steps with non constant intervals. QwtDateScaleEngine
25 classifies intervals and aligns the boundaries and tick positions
26 according to this classification.
27
28 QwtDateScaleEngine supports representations depending
29 on Qt::TimeSpec specifications. The valid range for scales
30 is limited by the range of QDateTime, that differs
31 between Qt4 and Qt5.
32
33 Datetime values are expected as the number of milliseconds since
34 1970-01-01T00:00:00 Universal Coordinated Time - also known
35 as "The Epoch", that can be converted to QDateTime using
36 QwtDate::toDateTime().
37
38 \sa QwtDate, QwtPlot::setAxisScaleEngine(),
39 QwtAbstractScale::setScaleEngine()
40*/
41class QWT_EXPORT QwtDateScaleEngine: public QwtLinearScaleEngine
42{
43public:
44 QwtDateScaleEngine( Qt::TimeSpec = Qt::LocalTime );
45 virtual ~QwtDateScaleEngine();
46
47 void setTimeSpec( Qt::TimeSpec );
48 Qt::TimeSpec timeSpec() const;
49
50 void setUtcOffset( int seconds );
51 int utcOffset() const;
52
53 void setWeek0Type( QwtDate::Week0Type );
54 QwtDate::Week0Type week0Type() const;
55
56 void setMaxWeeks( int );
57 int maxWeeks() const;
58
59 virtual void autoScale( int maxNumSteps,
60 double &x1, double &x2, double &stepSize ) const;
61
62 virtual QwtScaleDiv divideScale(
63 double x1, double x2,
64 int maxMajorSteps, int maxMinorSteps,
65 double stepSize = 0.0 ) const;
66
67 virtual QwtDate::IntervalType intervalType(
68 const QDateTime &, const QDateTime &, int maxSteps ) const;
69
70 QDateTime toDateTime( double ) const;
71
72protected:
73 virtual QDateTime alignDate( const QDateTime &, double stepSize,
74 QwtDate::IntervalType, bool up ) const;
75
76private:
77 QwtScaleDiv buildScaleDiv( const QDateTime &, const QDateTime &,
78 int maxMajorSteps, int maxMinorSteps,
79 QwtDate::IntervalType ) const;
80
81private:
82 class PrivateData;
83 PrivateData *d_data;
84};
85
86#endif
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