[Development] Calendar Types
finally, I'm going to update date time classes to support world calendar types while keeping the binary compatibility. here's an overview of the new changes to be done at this level. Please review and let me know if something wrong. #JohnLayt I'd like to specially hear from you. • The new Qt::CalendarType enumeration which contains Gregorian, Hebrew, Islamic, Persian and Hindu • These QDate methods will get a new parameter of type Qt::CalendarType (Gregorian by default): QDate(int y, int m, int d) int day() const int dayOfWeek() const int dayOfYear() const int daysInMonth() const int daysInYear() const void getDate(int * year, int * month, int * day) bool setDate(int year, int month, int day) QString toString(const QString format) const QString toString(Qt::DateFormat format = Qt::TextDate) const int weekNumber(int * yearNumber = 0) const int year() const QDate fromString(const QString string, Qt::DateFormat format = Qt::TextDate) QDate fromString(const QString string, const QString format) bool isLeapYear(int year) QString longDayName(int weekday, MonthNameType type = DateFormat) QString longMonthName(int month, MonthNameType type = DateFormat) QString shortDayName(int weekday, MonthNameType type = DateFormat) QString shortMonthName(int month, MonthNameType type = DateFormat) • These QDateTime methods will get a new parameter of type Qt::CalendarType (Gregorian by default): QString toString(const QString format) const QString toString(Qt::DateFormat format = Qt::TextDate) const QDateTime fromString(const QString string, Qt::DateFormat format = Qt::TextDate) QDateTime fromString(const QString string, const QString format) ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
Re: [Development] Calendar Types
On 17 October 2013 19:30, qt...@madagon.com wrote: finally, I'm going to update date time classes to support world calendar types while keeping the binary compatibility. here's an overview of the new changes to be done at this level. Please review and let me know if something wrong. #JohnLayt I'd like to specially hear from you. Hi, QCalendarSystem is on my TODO list for Qt5.3, but there's a series of steps we need to complete first to get there. I do have working code for most of the calendar systems at [1], but while the API is close to what we will use, the formulas are unlikely to get used now. This is because the data required for the names would add 3-5 MB to the QtCore library size which was deemed too much. We instead decided to use ICU for all our localization, but that ran into other problems and so that was shelved too. There's an outline of the ICU-based api design at [2], but obviously that now needs to be reviewed. The design we will now use is for QCalendarSystem (and other locale code) to be a thin wrapper around each platforms native support, just like I did for QTimeZone. I'll be starting on updating the design next week. The problem is that before starting on QCalendarSystem we need to change QLocale to only use the native platform locale code and database instead of Qt's own. The biggest part of that is changing Linux to always use ICU instead. I have most of the code for that but it needs more work. So, once all that is done we can then add QCalendarSystem, after which we will need to integrate it into QLocale and QDateTime and the datetime widgets, so a lot of work to do. The one thing that won't happen is that QDate will start returning local calendar values, it will only ever return Gregorian dates to maintain backwards compatible behaviour. To get local calendar values you access the calendar via QLocale. So, for now wait a little and I'll have an updated design ready in a couple of weeks to be discussed on list before we get started. Cheers! John. [1] https://qt.gitorious.org/qt/odysseus-qtbase/commit/9c1b7ec7772ba2ae1da904c4054bd9032836adff [2] http://qt-project.org/wiki/Qt-5-ICU ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
