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87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
3 weeks ago
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef _QWT_DATE_SCALE_DRAW_H_
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#define _QWT_DATE_SCALE_DRAW_H_ 1
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#include "qwt_global.h"
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#include "qwt_scale_draw.h"
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#include "qwt_date.h"
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/*!
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\brief A class for drawing datetime scales
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QwtDateScaleDraw displays values as datetime labels.
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The format of the labels depends on the alignment of
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the major tick labels.
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The default format strings are:
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- Millisecond\n
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"hh:mm:ss:zzz\nddd dd MMM yyyy"
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- Second\n
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"hh:mm:ss\nddd dd MMM yyyy"
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- Minute\n
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"hh:mm\nddd dd MMM yyyy"
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- Hour\n
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"hh:mm\nddd dd MMM yyyy"
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- Day\n
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"ddd dd MMM yyyy"
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- Week\n
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"Www yyyy"
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- Month\n
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"MMM yyyy"
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- Year\n
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"yyyy"
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The format strings can be modified using setDateFormat()
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or individually for each tick label by overloading dateFormatOfDate(),
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Usually QwtDateScaleDraw is used in combination with
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QwtDateScaleEngine, that calculates scales for datetime
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intervals.
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\sa QwtDateScaleEngine, QwtPlot::setAxisScaleDraw()
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*/
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class QWT_EXPORT QwtDateScaleDraw: public QwtScaleDraw
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{
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public:
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QwtDateScaleDraw( Qt::TimeSpec = Qt::LocalTime );
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virtual ~QwtDateScaleDraw();
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void setDateFormat( QwtDate::IntervalType, const QString & );
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QString dateFormat( QwtDate::IntervalType ) const;
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void setTimeSpec( Qt::TimeSpec );
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Qt::TimeSpec timeSpec() const;
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void setUtcOffset( int seconds );
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int utcOffset() const;
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void setWeek0Type( QwtDate::Week0Type );
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QwtDate::Week0Type week0Type() const;
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virtual QwtText label( double ) const;
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QDateTime toDateTime( double ) const;
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protected:
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virtual QwtDate::IntervalType
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intervalType( const QwtScaleDiv & ) const;
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virtual QString dateFormatOfDate( const QDateTime &,
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QwtDate::IntervalType ) const;
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private:
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class PrivateData;
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PrivateData *d_data;
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};
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#endif
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