1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
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 *****************************************************************************/
10 #ifndef _QWT_DATE_SCALE_DRAW_H_
11 #define _QWT_DATE_SCALE_DRAW_H_ 1
13 #include "qwt_global.h"
14 #include "qwt_scale_draw.h"
18 \brief A class for drawing datetime scales
20 QwtDateScaleDraw displays values as datetime labels.
21 The format of the labels depends on the alignment of
22 the major tick labels.
24 The default format strings are:
27 "hh:mm:ss:zzz\nddd dd MMM yyyy"
29 "hh:mm:ss\nddd dd MMM yyyy"
31 "hh:mm\nddd dd MMM yyyy"
33 "hh:mm\nddd dd MMM yyyy"
43 The format strings can be modified using setDateFormat()
44 or individually for each tick label by overloading dateFormatOfDate(),
46 Usually QwtDateScaleDraw is used in combination with
47 QwtDateScaleEngine, that calculates scales for datetime
50 \sa QwtDateScaleEngine, QwtPlot::setAxisScaleDraw()
52 class QWT_EXPORT QwtDateScaleDraw
: public QwtScaleDraw
55 QwtDateScaleDraw( Qt::TimeSpec
= Qt::LocalTime
);
56 virtual ~QwtDateScaleDraw();
58 void setDateFormat( QwtDate::IntervalType
, const QString
& );
59 QString
dateFormat( QwtDate::IntervalType
) const;
61 void setTimeSpec( Qt::TimeSpec
);
62 Qt::TimeSpec
timeSpec() const;
64 void setUtcOffset( int seconds
);
65 int utcOffset() const;
67 void setWeek0Type( QwtDate::Week0Type
);
68 QwtDate::Week0Type
week0Type() const;
70 virtual QwtText
label( double ) const;
72 QDateTime
toDateTime( double ) const;
75 virtual QwtDate::IntervalType
76 intervalType( const QwtScaleDiv
& ) const;
78 virtual QString
dateFormatOfDate( const QDateTime
&,
79 QwtDate::IntervalType
) const;