[Solved]How to get the difference between current time zone and UTC?

[slumberdin]

Hi all,
hope u all can help me in solving this problem.
When I read about the documentation of QTimeDate, I don't really understand on how to find the difference between the both time zone.
Can anyone help me?
At least give a clue or some function or maybe some explaination, I don't really need a full source code.

By the way, this is my code snippet:

@
QDateTime now = QDateTime::currentDateTime();
QString strTime = QString("Date Saved: " + now.toString("dd MMMM yyyy") + "<br/>"
+"Day Saved: " + now.toString("dddd") + "<br/>"
+"Time Saved: " + now.toString("hh:mm:ss ap") + "<br/>"
+"Time At Crime Scene: " + now.toString(Qt::RFC2822Date) + "<br/>"
+"Time Offset At UTC: " + now.toUTC().toString(Qt::RFC2822Date) + "<br/>"
+"The Time Zone Abbreviation: " + now.timeZoneAbbreviation() + "<br/><br/>");
ui->textBrowser->setHtml(strTime);
@

[Rahul Das]

What about "QTimeZone":https://qt-project.org/doc/qt-5-snapshot/qtimezone.html Class ?

[slumberdin]

Yeah, I did read QTimeZone Class.
But, in the end, I still don't find the correct way to find the different between both time zone and display it in the QTextBrowser.

[andreyc]

This "example":https://qt-project.org/doc/qt-5-snapshot/qdatetime.html#toUTC shows a difference between local and UTC time in seconds.
Is it what you are looking for ?

[slumberdin]

Yup, this is some sort on how to find the difference between both time.
But in the end, it will just return 0 because there is no difference between both time.
Because it is still the same time but only in different places.

What I want to come out in my QTextBrowser is something like this:
UTC+08:00

[andreyc]

Try this one
@
QDateTime local(QDateTime::currentDateTime());
QDateTime UTC(local.toUTC());
QDateTime dt(UTC.date(), UTC.time(), Qt::LocalTime);
qDebug() << "Local time is:" << local;
qDebug() << "UTC time is:" << UTC;
qDebug() << "No difference between times:" << local.secsTo(UTC);
qDebug() << "Here is the difference between times:" << local.secsTo(dt);
qDebug() << "Here is the difference between times:" << dt.secsTo(local);

@

[slumberdin]

Thanks, andreyc.
It's really help a lot.
Thanks for suggesting to use the third sentence. :)