QDate, QTime & QDateTime functions

[Bracha]

@Christian-Ehrlicher
Not necessarily expensive as well as cumbersome.
I have some conditions and I need change year/month/day accordingly, and i need to setDate with the parameters that already appear,
like: qDate_tmp.setDate(qDateTime_L.date().year() + 1, qDateTime_L.date().month(),
qDateTime_L.date().day());
qDateTime_L.setDate(qDate_tmp);
instead: qDateTime_L.setYear(qDateTime_L.date().year() + 1)

@Axel-Spoerl
I don't like use Macro's

[Christian Ehrlicher]

What's wrong with QDate::addYears()?

auto newDate = QDateTime(curDateTime.date().addYear(1), curDateTime.time());
or
curDateTime.setDate(curDateTime.date().addYear(1));

[Bracha]

@Christian-Ehrlicher
Thank you,
I'll try to play with it and see how it works .
It's still not as simple and bright as the option I suggested but if that's what it is, we'll get it right.
Thank you all.

[JonB]

@Bracha
Yes it is true that it's a bit awkward to want to e.g. just set one element in an existing QDateTime. It does not help that their are methods on QDate & QTime which help but not on a whole QDateTime. You just have to live with the way Qt does this.

If it were me I would probably write a global "utility" inline function to do a particular operation you want on a QDateTime, for the code you showed.

[J.Hilk]

@JonB or, hear me out,

you make a new class and inherit from QDateTime where you add those convenient setX functions....

[Bracha]

@JonB and @J-Hilk
Thank you friends for your understanding and suggestions,
I will seriously consider them and use them.

[JonB]

@J-Hilk said in QDate, QTime & QDateTime functions:

you make a new class and inherit from QDateTime where you add those convenient setX functions....

But that does not work when existing functions return a QDateTime..... :(

[Bracha]

@JonB
Will have to convert them to the new object
Another type of awkwardness

[J.Hilk]

you could, and should, make a constructor that excepts a QDateTime object as argument, that than can be done implicitly :D

[Bracha]

@Christian-Ehrlicher I actually used your suggestion which is convenient for me at the moment but is probably a solution only for the date and not the time, Just want you to pay attention

[Bracha]

Just want to summarize the proposed solutions in an orderly fashion so that it remains for the future:

@Christian-Ehrlicher: use QDate::addDays() / QDate::addMonths() / QDate::addYears(). [for dates]
example: [qDateTime.setDate(qDateTime.date().addYears(XXX)]

@JonB : write a global "utility" inline function to do a particular operation you want on a QDateTime.

@J-Hilk: make a new class and inherit from QDateTime where you add those convenient setX functions.
don't forget to convert the returning objects from the existing functions that return a QDateTime object to the new object,
or make a constructor that excepts a QDateTime object as argument, that than can be done implicitly.

Thank you all for a fruitful discussion and varied and helpful suggestions!