Details
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Suggestion
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Resolution: Unresolved
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P2: Important
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6.0.0 Alpha
Description
Perhaps related to QTBUG-87610, I found something interesting while fixing QtPIM unit tests to work with Qt6 - in this case, Qt6 behaviour is correct, while the previous Qt5 behaviour was incorrect, so I suggest adding a note to the "Porting From Qt5 to Qt6" documentation about this.
Consider the following main.qml:
import QtQuick 2.0 import Helper 1.0 Rectangle { width: 200 height: 200 color: "lightsteelblue" property var helper: Helper { startDateTime: '2011-10-23T15:00:00Z' } Component.onCompleted: { console.log("Have startDateTime: " + helper.startDateTime) } }
with the following main.cpp:
#include <QtCore/QCoreApplication> #include <QtCore/QVariantMap> #include <QtCore/QDateTime> #include <QtCore/QString> #include <QtCore/QStringList> #include <QtCore/QTimer> #include <QtCore/QObject> #include <QtGui/QGuiApplication> #include <QtQml/QQmlEngine> #include <QtQml/QQmlComponent> #include <QtQml/QQmlContext> #include <QtQuick/QQuickView> #include <QtDebug> class Helper : public QObject { Q_OBJECT Q_PROPERTY(QDateTime startDateTime READ startDateTime WRITE setStartDateTime NOTIFY startDateTimeChanged) public: Helper(QObject *parent = 0) : QObject(parent) {} QDateTime startDateTime() const { return m_startDateTime; } void setStartDateTime(const QDateTime &sdt) { m_startDateTime = sdt; emit startDateTimeChanged(); } Q_SIGNALS: void startDateTimeChanged(); private: QDateTime m_startDateTime; }; int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); qmlRegisterType<Helper>("Helper", 1, 0, "Helper"); QQuickView view; view.setSource(QUrl(QStringLiteral("main.qml"))); view.show(); return app.exec(); } #include "main.moc"
Running in machine with locale set to my local timezone (Brisbane, GMT+10).
With Qt5:
$ ./testdate qml: Have startDateTime: Sun Oct 23 15:00:00 2011 GMT+1000
With Qt6:
$ ./testdate qml: Have startDateTime: Mon Oct 24 01:00:00 2011 GMT+1000
It appears that the timezone information is ignored in Qt5, while being correctly handled now in Qt6. I suggest that this behaviour change be added to the documentation, if it has not been already (and if it has already, I apologise for the noise).
(It also reproduces similarly for a value like '2011-10-23T15:00:00+0300'.)