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  1. Qt
  2. QTBUG-62285

QDateTimeAxis::setRange doesn't preserve the TimeSpec

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      If you use for instance UTC QDateTime and pass it to QDateTimeAxis::setRange, the time will changed internally to LocalTime, which will add an extra offset to time. For instance create a QDateTime like this 

          QDateTime minDt;
    QDateTime maxDt;
    minDt.setOffsetFromUtc(0);
    maxDt.setOffsetFromUtc(0);
    minDt.setMSecsSinceEpoch(0);
    maxDt.setMSecsSinceEpoch(8000);

      Where the value are like this

      minDt = QDateTime(1970-01-01 00:00:00.000 UTC Qt::TimeSpec(UTC)) , since epoc 0
maxDt = QDateTime(1970-01-01 00:00:08.000 UTC Qt::TimeSpec(UTC)) , since epoc 8000

      When these are passed to QDateTimeAxis::setRange, the maxDt will end up to this

      QDateTime(1970-01-01 02:00:08.000 FLE Standard Time Qt::TimeSpec(LocalTime))

      Which has extra 2 hours in my case. See also the image.

        1. datetimeaxis.png
          datetimeaxis.png
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            axelspoerl Axel Spoerl
            misalmel Mika Salmela
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              Created:
              Updated:
              Resolved:

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