QwtDateScaleDraw - A class for drawing datetime scales.

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Version 6.1.4                                    Wed Jan 2 2019                              QwtDateScaleDraw(3)

QwtDateScaleDraw::QwtDateScaleDraw(Qt::TimeSpectimeSpec=Qt::LocalTime)
       Constructor.  The  default  setting is to display tick labels for the given time specification. The first
       week of a year is defined like for QwtDate::FirstThursday.

       Parameters:timeSpec Time specification

       Seealso:setTimeSpec(), setWeek0Type()

       A class for drawing datetime scales.

       QwtDateScaleDraw displays values as datetime labels. The format of the labels depends on the alignment of
       the major tick labels.

       The default format strings are:

       • Millisecond
          'hh:mm:ss:zzz\nddd dd MMM yyyy'

       • Second
          'hh:mm:ss\nddd dd MMM yyyy'

       • Minute
          'hh:mm\nddd dd MMM yyyy'

       • Hour
          'hh:mm\nddd dd MMM yyyy'

       • Day
          'ddd dd MMM yyyy'

       • Week
          'Www yyyy'

       • Month
          'MMM yyyy'

       • Year
          'yyyy'

       The  format  strings  can  be  modified  using  setDateFormat()  or  individually  for each tick label by
       overloading dateFormatOfDate(),

       Usually QwtDateScaleDraw is used in combination  with  QwtDateScaleEngine,  that  calculates  scales  for
       datetime intervals.

       Seealso:QwtDateScaleEngine, QwtPlot::setAxisScaleDraw()

QStringQwtDateScaleDraw::dateFormat(QwtDate::IntervalTypeintervalType)constParameters:intervalType Interval type

       Returns:
           Default format string for an datetime interval type

       Seealso:setDateFormat(), dateFormatOfDate()QStringQwtDateScaleDraw::dateFormatOfDate(constQDateTime&dateTime,QwtDate::IntervalTypeintervalType)const[protected],[virtual]
       Format string for the representation of a datetime

       dateFormatOfDate() is intended to be overloaded for situations, where formats are individual for specific
       datetime values.

       The default setting ignores dateTime and return the default format for the interval type.

       Parameters:dateTime Datetime value
           intervalType Interval type

       Returns:
           Format string

       Seealso:setDateFormat(), QwtDate::toString()QwtDate::IntervalTypeQwtDateScaleDraw::intervalType(constQwtScaleDiv&scaleDiv)const[protected],[virtual]
       Find the less detailed datetime unit, where no rounding errors happen.

       Parameters:scaleDiv Scale division

       Returns:
           Interval type

       Seealso:dateFormatOfDate()QwtTextQwtDateScaleDraw::label(doublevalue)const[virtual]
       Convert a value into  its  representing  label.  The  value  is  converted  to  a  datetime  value  using
       toDateTime() and converted to a plain text using QwtDate::toString().

       Parameters:value Value

       Returns:
           Label string.

       Seealso:dateFormatOfDate()

       Reimplemented from QwtAbstractScaleDraw.

   voidQwtDateScaleDraw::setDateFormat(QwtDate::IntervalTypeintervalType,constQString&format)
       Set the default format string for an datetime interval type

       Parameters:intervalType Interval type
           format Default format string

       Seealso:dateFormat(), dateFormatOfDate(), QwtDate::toString()voidQwtDateScaleDraw::setTimeSpec(Qt::TimeSpectimeSpec)
       Set the time specification used for the tick labels

       Parameters:timeSpec Time specification

       Seealso:timeSpec(), setUtcOffset(), toDateTime()voidQwtDateScaleDraw::setUtcOffset(intseconds)
       Set the offset in seconds from Coordinated Universal Time

       Parameters:seconds Offset in seconds

       Note:
           The offset has no effect beside for the time specification Qt::OffsetFromUTC.

       Seealso:
           QDate::utcOffset(), setTimeSpec(), toDateTime()voidQwtDateScaleDraw::setWeek0Type(QwtDate::Week0Typeweek0Type)
       Sets how to identify the first week of a year.

       Parameters:week0Type Mode how to identify the first week of a year

       Seealso:week0Type().

       Note:
           week0Type has no effect beside for intervals classified as QwtDate::Week.

   Qt::TimeSpecQwtDateScaleDraw::timeSpec()constReturns:
           Time specification used for the tick labels

       Seealso:setTimeSpec(), utcOffset(), toDateTime()QDateTimeQwtDateScaleDraw::toDateTime(doublevalue)const
       Translate a double value into a QDateTime object.

       Returns:
           QDateTime object initialized with timeSpec() and utcOffset().

       Seealso:timeSpec(), utcOffset(), QwtDate::toDateTime()intQwtDateScaleDraw::utcOffset()constReturns:
           Offset in seconds from Coordinated Universal Time

       Note:
           The offset has no effect beside for the time specification Qt::OffsetFromUTC.

       Seealso:
           QDate::setUtcOffset(), setTimeSpec(), toDateTime()QwtDate::Week0TypeQwtDateScaleDraw::week0Type()constReturns:
           Setting how to identify the first week of a year.

       Seealso:setWeek0Type()

       QwtDateScaleDraw - A class for drawing datetime scales.

       #include <qwt_date_scale_draw.h>

       Inherits QwtScaleDraw.

   PublicMemberFunctionsQwtDateScaleDraw (Qt::TimeSpec=Qt::LocalTime)
           Constructor.
       virtual ~QwtDateScaleDraw ()
           Destructor.
       void setDateFormat (QwtDate::IntervalType, const QString &)
       QString dateFormat (QwtDate::IntervalType) const
       void setTimeSpec (Qt::TimeSpec)
       Qt::TimeSpec timeSpec () const
       void setUtcOffset (int seconds)
       int utcOffset () const
       void setWeek0Type (QwtDate::Week0Type)
       QwtDate::Week0Typeweek0Type () const
       virtual QwtTextlabel (double) const
           Convert a value into its representing label.
       QDateTime toDateTime (double) const

   ProtectedMemberFunctions
       virtual QwtDate::IntervalTypeintervalType (const QwtScaleDiv &) const
       virtual QString dateFormatOfDate (const QDateTime &, QwtDate::IntervalType) const

   AdditionalInheritedMembers