///////////////////////////////////////////////////////////////////////////// // Name: datetime.h // Purpose: interface of wxDateTime // Author: wxWidgets team // RCS-ID: $Id$ // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// /** @class wxDateTime @wxheader{datetime.h} wxDateTime class represents an absolute moment in the time. @library{wxbase} @category{data} @stdobjects ::wxDefaultDateTime @see @ref overview_wxdatetimeoverview "Date classes overview", wxTimeSpan, wxDateSpan, wxCalendarCtrl */ class wxDateTime { public: /** Same as @ref setdate() Set */ wxDateTime(wxDateTime_t day, Month month = Inv_Month, int year = Inv_Year, wxDateTime_t hour = 0, wxDateTime_t minute = 0, wxDateTime_t second = 0, wxDateTime_t millisec = 0); /** Here are the trivial accessors. Other functions, which might have to perform some more complicated calculations to find the answer are under the @ref overview_datetimecalculations "Calendar calculations" section. IsValid() GetTicks() GetCentury() GetYear() GetMonth() GetDay() GetWeekDay() GetHour() GetMinute() GetSecond() GetMillisecond() GetDayOfYear() GetWeekOfYear() GetWeekOfMonth() GetYearDay() IsWorkDay() IsGregorianDate() GetAsDOS() */ //@{ /** Adds the given date span to this object. */ wxDateTime Add(const wxDateSpan& diff); const wxDateTime& Add(const wxDateSpan& diff); wxDateTime operator+=(const wxDateSpan& diff); //@} /** Some degree of support for the date units used in astronomy and/or history is provided. You can construct a wxDateTime object from a @ref setjdn() JDN and you may also get its JDN, @ref getmodifiedjuliandaynumber() MJD or @ref getratadie() "Rata Die number" from it. @ref wxdatetimejdn() "wxDateTime(double jdn)" @ref setjdn() "Set(double jdn)" GetJulianDayNumber() GetJDN() GetModifiedJulianDayNumber() GetMJD() GetRataDie() */ /** The functions in this section perform the basic calendar calculations, mostly related to the week days. They allow to find the given week day in the week with given number (either in the month or in the year) and so on. All (non-const) functions in this section don't modify the time part of the wxDateTime -- they only work with the date part of it. SetToWeekDayInSameWeek() GetWeekDayInSameWeek() SetToNextWeekDay() GetNextWeekDay() SetToPrevWeekDay() GetPrevWeekDay() SetToWeekDay() @ref wxDateTime::getweekday2 GetWeekDay SetToLastWeekDay() GetLastWeekDay() SetToWeekOfYear() SetToLastMonthDay() GetLastMonthDay() SetToYearDay() GetYearDay() */ /** Constructors and various @c Set() methods are collected here. If you construct a date object from separate values for day, month and year, you should use IsValid() method to check that the values were correct as constructors can not return an error code. @ref wxdatetimedef() wxDateTime @ref wxdatetimetimet() wxDateTime(time_t) @ref wxdatetimetm() "wxDateTime(struct tm)" @ref wxdatetimejdn() "wxDateTime(double jdn)" @ref wxdatetimetime() "wxDateTime(h, m, s, ms)" @ref wxdatetimedate() "wxDateTime(day, mon, year, h, m, s, ms)" SetToCurrent() @ref settimet() Set(time_t) @ref settm() "Set(struct tm)" @ref setjdn() "Set(double jdn)" @ref settime() "Set(h, m, s, ms)" @ref setdate() "Set(day, mon, year, h, m, s, ms)" @ref setfromdos() "SetFromDOS(unsigned long ddt)" ResetTime() SetYear() SetMonth() @ref setdate() SetDay SetHour() SetMinute() SetSecond() SetMillisecond() @ref operatoreqtimet() operator=(time_t) @ref operatoreqtm() "operator=(struct tm)" */ /** Converts the year in absolute notation (i.e. a number which can be negative, positive or zero) to the year in BC/AD notation. For the positive years, nothing is done, but the year 0 is year 1 BC and so for other years there is a difference of 1. This function should be used like this: */ static int ConvertYearToBC(int year); /** These functions carry out arithmetics() on the wxDateTime objects. As explained in the overview, either wxTimeSpan or wxDateSpan may be added to wxDateTime, hence all functions are overloaded to accept both arguments. Also, both @c Add() and @c Subtract() have both const and non-const version. The first one returns a new object which represents the sum/difference of the original one with the argument while the second form modifies the object to which it is applied. The operators -= and += are defined to be equivalent to the second forms of these functions. @ref addts() Add(wxTimeSpan) @ref addds() Add(wxDateSpan) @ref subtractts() Subtract(wxTimeSpan) @ref subtractds() Subtract(wxDateSpan) @ref subtractdt() Subtract(wxDateTime) @ref addts() oparator+=(wxTimeSpan) @ref addds() oparator+=(wxDateSpan) @ref subtractts() oparator-=(wxTimeSpan) @ref subtractds() oparator-=(wxDateSpan) */ /** There are several function to allow date comparison. To supplement them, a few global operators , etc taking wxDateTime are defined. IsEqualTo() IsEarlierThan() IsLaterThan() IsStrictlyBetween() IsBetween() IsSameDate() IsSameTime() IsEqualUpTo() */ /** This function does the same as the standard ANSI C @c strftime(3) function. Please see its description for the meaning of @a format parameter. It also accepts a few wxWidgets-specific extensions: you can optionally specify the width of the field to follow using @c printf(3)-like syntax and the format specification @c %l can be used to get the number of milliseconds. @see ParseFormat() */ wxString Format(const wxChar* format = wxDefaultDateTimeFormat, const TimeZone& tz = Local) const; /** Identical to calling Format() with @c "%x" argument (which means 'preferred date representation for the current locale'). */ wxString FormatDate() const; /** Returns the combined date-time representation in the ISO 8601 format (YYYY-MM-DDTHH:MM:SS). The @a sep parameter default value produces the result exactly corresponding to the ISO standard, but it can also be useful to use a space as seprator if a more human-readable combined date-time representation is needed. @see FormatISODate(), FormatISOTime(), ParseISOCombined() */ wxString FormatISOCombined(char sep = 'T') const; /** This function returns the date representation in the ISO 8601 format (YYYY-MM-DD). */ wxString FormatISODate() const; /** This function returns the time representation in the ISO 8601 format (HH:MM:SS). */ wxString FormatISOTime() const; /** Identical to calling Format() with @c "%X" argument (which means 'preferred time representation for the current locale'). */ wxString FormatTime() const; /** Transform the date from the given time zone to the local one. If @a noDST is @true, no DST adjustments will be made. Returns the date in the local time zone. */ wxDateTime FromTimezone(const TimeZone& tz, bool noDST = false) const; /** Returns the translations of the strings @c AM and @c PM used for time formatting for the current locale. Either of the pointers may be @NULL if the corresponding value is not needed. */ static void GetAmPmStrings(wxString* am, wxString* pm); /** Returns the date and time in DOS format. */ long unsigned int GetAsDOS() const; /** Get the beginning of DST for the given country in the given year (current one by default). This function suffers from limitations described in @ref overview_tdatedst "DST overview". @see GetEndDST() */ static wxDateTime GetBeginDST(int year = Inv_Year, Country country = Country_Default); /** Returns the century of this date. */ int GetCentury(const TimeZone& tz = Local) const; /** Returns the current default country. The default country is used for DST calculations, for example. @see SetCountry() */ static Country GetCountry(); /** Get the current month in given calendar (only Gregorian is currently supported). */ static Month GetCurrentMonth(Calendar cal = Gregorian); /** Get the current year in given calendar (only Gregorian is currently supported). */ static int GetCurrentYear(Calendar cal = Gregorian); /** Returns the object having the same date component as this one but time of 00:00:00. @wxsince{2.8.2} @see ResetTime() */ wxDateTime GetDateOnly() const; /** Returns the day in the given timezone (local one by default). */ short unsigned int GetDay(const TimeZone& tz = Local) const; /** Returns the day of the year (in 1...366 range) in the given timezone (local one by default). */ short unsigned int GetDayOfYear(const TimeZone& tz = Local) const; /** Returns the end of DST for the given country in the given year (current one by default). @see GetBeginDST() */ static wxDateTime GetEndDST(int year = Inv_Year, Country country = Country_Default); /** Returns the hour in the given timezone (local one by default). */ short unsigned int GetHour(const TimeZone& tz = Local) const; /** Synonym for GetJulianDayNumber(). */ double GetJDN() const; /** Returns the @ref setjdn() JDN corresponding to this date. Beware of rounding errors! @see GetModifiedJulianDayNumber() */ double GetJulianDayNumber() const; /** Returns the copy of this object to which SetToLastMonthDay() was applied. */ wxDateTime GetLastMonthDay(Month month = Inv_Month, int year = Inv_Year) const; /** Returns the copy of this object to which SetToLastWeekDay() was applied. */ wxDateTime GetLastWeekDay(WeekDay weekday, Month month = Inv_Month, int year = Inv_Year); /** Synonym for GetModifiedJulianDayNumber(). */ double GetMJD() const; /** Returns the milliseconds in the given timezone (local one by default). */ short unsigned int GetMillisecond(const TimeZone& tz = Local) const; /** Returns the minute in the given timezone (local one by default). */ short unsigned int GetMinute(const TimeZone& tz = Local) const; /** Returns the @e Modified Julian Day Number (MJD) which is, by definition, equal to JDN - 2400000.5. The MJDs are simpler to work with as the integral MJDs correspond to midnights of the dates in the Gregorian calendar and not th noons like JDN. The MJD 0 is Nov 17, 1858. */ double GetModifiedJulianDayNumber() const; /** Returns the month in the given timezone (local one by default). */ Month GetMonth(const TimeZone& tz = Local) const; /** Gets the full (default) or abbreviated (specify @c Name_Abbr name of the given month. @see GetWeekDayName() */ static wxString GetMonthName(Month month, NameFlags flags = Name_Full); /** Returns the copy of this object to which SetToNextWeekDay() was applied. */ wxDateTime GetNextWeekDay(WeekDay weekday) const; //@{ /** Returns the number of days in the given year or in the given month of the year. The only supported value for @a cal parameter is currently @c Gregorian. */ static wxDateTime_t GetNumberOfDays(int year, Calendar cal = Gregorian); static wxDateTime_t GetNumberOfDays(Month month, int year = Inv_Year, Calendar cal = Gregorian); //@} /** Returns the copy of this object to which SetToPrevWeekDay() was applied. */ wxDateTime GetPrevWeekDay(WeekDay weekday) const; /** Return the @e Rata Die number of this date. By definition, the Rata Die number is a date specified as the number of days relative to a base date of December 31 of the year 0. Thus January 1 of the year 1 is Rata Die day 1. */ double GetRataDie() const; /** Returns the seconds in the given timezone (local one by default). */ short unsigned int GetSecond(const TimeZone& tz = Local) const; /** Returns the number of seconds since Jan 1, 1970. An assert failure will occur if the date is not in the range covered by @c time_t type. */ time_t GetTicks() const; /** Returns the current time. */ static time_t GetTimeNow(); /** Returns broken down representation of the date and time. */ Tm GetTm(const TimeZone& tz = Local) const; /** Returns the current time broken down. Note that this function returns a pointer to a static buffer that's reused by calls to this function and certain C library functions (e.g. localtime). If there is any chance your code might be used in a multi-threaded application, you really should use the flavour of function GetTmNow() taking a parameter. */ static struct tm* GetTmNow(); /** Returns the copy of this object to which SetToWeekDay() was applied. */ wxDateTime GetWeekDay(WeekDay weekday, int n = 1, Month month = Inv_Month, int year = Inv_Year) const; /** Returns the copy of this object to which SetToWeekDayInSameWeek() was applied. */ wxDateTime GetWeekDayInSameWeek(WeekDay weekday, WeekFlags flags = Monday_First) const; /** Gets the full (default) or abbreviated (specify @c Name_Abbr name of the given week day. @see GetMonthName() */ static wxString GetWeekDayName(WeekDay weekday, NameFlags flags = Name_Full); /** Returns the ordinal number of the week in the month (in 1...5 range). As GetWeekOfYear(), this function supports both conventions for the week start. See the description of these @ref overview_wxdatetime "week start" conventions. */ wxDateTime_t GetWeekOfMonth(WeekFlags flags = Monday_First, const TimeZone& tz = Local) const; /** Returns the number of the week of the year this date is in. The first week of the year is, according to international standards, the one containing Jan 4 or, equivalently, the first week which has Thursday in this year. Both of these definitions are the same as saying that the first week of the year must contain more than half of its days in this year. Accordingly, the week number will always be in 1...53 range (52 for non-leap years). The function depends on the @ref overview_wxdatetime "week start" convention specified by the @a flags argument but its results for @c Sunday_First are not well-defined as the ISO definition quoted above applies to the weeks starting on Monday only. */ wxDateTime_t GetWeekOfYear(WeekFlags flags = Monday_First, const TimeZone& tz = Local) const; /** Returns the year in the given timezone (local one by default). */ int GetYear(const TimeZone& tz = Local) const; /** Returns the copy of this object to which SetToYearDay() was applied. */ wxDateTime GetYearDay(short unsigned int) const; /** Returns @true if IsStrictlyBetween() is @true or if the date is equal to one of the limit values. @see IsStrictlyBetween() */ bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const; /** Returns @true if the DST is applied for this date in the given country. */ int IsDST(Country country = Country_Default) const; /** Returns @true if DST was used n the given year (the current one by default) in the given country. */ static bool IsDSTApplicable(int year = Inv_Year, Country country = Country_Default); /** Returns @true if this date precedes the given one. */ bool IsEarlierThan(const wxDateTime& datetime) const; /** Returns @true if the two dates are strictly identical. */ bool IsEqualTo(const wxDateTime& datetime) const; /** Returns @true if the date is equal to another one up to the given time interval, i.e. if the absolute difference between the two dates is less than this interval. */ bool IsEqualUpTo(const wxDateTime& dt, const wxTimeSpan& ts) const; /** Returns @true if the given date is later than the date of adoption of the Gregorian calendar in the given country (and hence the Gregorian calendar calculations make sense for it). */ bool IsGregorianDate(GregorianAdoption country = Gr_Standard) const; /** Returns @true if this date is later than the given one. */ bool IsLaterThan(const wxDateTime& datetime) const; /** Returns @true if the @a year is a leap one in the specified calendar. This functions supports Gregorian and Julian calendars. */ static bool IsLeapYear(int year = Inv_Year, Calendar cal = Gregorian); /** Returns @true if the date is the same without comparing the time parts. */ bool IsSameDate(const wxDateTime& dt) const; /** Returns @true if the time is the same (although dates may differ). */ bool IsSameTime(const wxDateTime& dt) const; /** Returns @true if this date lies strictly between the two others, @see IsBetween() */ bool IsStrictlyBetween(const wxDateTime& t1, const wxDateTime& t2) const; /** Returns @true if the object represents a valid time moment. */ bool IsValid() const; /** This function returns @true if the specified (or default) country is one of Western European ones. It is used internally by wxDateTime to determine the DST convention and date and time formatting rules. */ static bool IsWestEuropeanCountry(Country country = Country_Default); /** Returns @true is this day is not a holiday in the given country. */ bool IsWorkDay(Country country = Country_Default) const; /** Same as FromTimezone() but modifies the object in place. */ wxDateTime MakeFromTimezone(const TimeZone& tz, bool noDST = false); /** Modifies the object in place to represent the date in another time zone. If @a noDST is @true, no DST adjustments will be made. */ wxDateTime MakeTimezone(const TimeZone& tz, bool noDST = false); /** This is the same as calling MakeTimezone() with the argument @c GMT0. */ wxDateTime& MakeUTC(bool noDST = false); /** Returns the object corresponding to the current time. Example: Note that this function is accurate up to second: UNow() should be used for better precision (but it is less efficient and might not be available on all platforms). @see Today() */ static wxDateTime Now(); //@{ /** This function is like ParseDateTime(), but it only allows the date to be specified. It is thus less flexible then ParseDateTime(), but also has less chances to misinterpret the user input. Returns @NULL if the conversion failed, otherwise return the pointer to the character which stopped the scan. */ const char* ParseDate(const wxString& date, wxString::const_iterator* end = NULL); const char* ParseDate(const char* date); const wchar_t* ParseDate(const wchar_t* date); //@} //@{ /** Parses the string @a datetime containing the date and time in free format. This function tries as hard as it can to interpret the given string as date and time. Unlike wxDateTime::ParseRfc822Date, it will accept anything that may be accepted and will only reject strings which can not be parsed in any way at all. Returns @NULL if the conversion failed, otherwise return the pointer to the character which stopped the scan. */ const char* ParseDateTime(const wxString& datetime, wxString::const_iterator* end = NULL); const char* ParseDateTime(const char* datetime); const wchar_t* ParseDateTime(const wchar_t* datetime); //@} //@{ /** This function parses the string @a date according to the given @e format. The system @c strptime(3) function is used whenever available, but even if it is not, this function is still implemented, although support for locale-dependent format specifiers such as @c "%c", @c "%x" or @c "%X" may not be perfect and GNU extensions such as @c "%z" and @c "%Z" are not implemented. This function does handle the month and weekday names in the current locale on all platforms, however. Please see the description of the ANSI C function @c strftime(3) for the syntax of the format string. The @a dateDef parameter is used to fill in the fields which could not be determined from the format string. For example, if the format is @c "%d" (the ay of the month), the month and the year are taken from @e dateDef. If it is not specified, Today() is used as the default date. Returns @NULL if the conversion failed, otherwise return the pointer to the character which stopped the scan. */ const char* ParseFormat(const wxString& date, const wxString& format = wxDefaultDateTimeFormat, const wxDateTime& dateDef = wxDefaultDateTime, wxString::const_iterator* end = NULL); const char* ParseFormat(const char* date, const wxString& format = wxDefaultDateTimeFormat, const wxDateTime& dateDef = wxDefaultDateTime); const wchar_t* ParseFormat(const wchar_t* date, const wxString& format = wxDefaultDateTimeFormat, const wxDateTime& dateDef = wxDefaultDateTime); //@} /** This function parses the string containing the date and time in ISO 8601 combined format (YYYY-MM-DDTHH:MM:SS). The separator between the date and time parts must be equal to @a sep for the function to succeed. Returns @true if the entire string was parsed successfully, @false otherwise. */ bool ParseISOCombined(const wxString& date, char sep = 'T'); /** This function parses the date in ISO 8601 format (YYYY-MM-DD). Returns @true if the entire string was parsed successfully, @false otherwise. */ bool ParseISODate(const wxString& date); /** This function parses the time in ISO 8601 format (HH:MM:SS). Returns @true if the entire string was parsed successfully, @false otherwise. */ bool ParseISOTime(const wxString& date); //@{ /** Parses the string @a date looking for a date formatted according to the RFC 822 in it. The exact description of this format may, of course, be found in the RFC (section 5), but, briefly, this is the format used in the headers of Internet email messages and one of the most common strings expressing date in this format may be something like @c "Sat, 18 Dec 1999 00:48:30 +0100". Returns @NULL if the conversion failed, otherwise return the pointer to the character immediately following the part of the string which could be parsed. If the entire string contains only the date in RFC 822 format, the returned pointer will be pointing to a @c NUL character. This function is intentionally strict, it will return an error for any string which is not RFC 822 compliant. If you need to parse date formatted in more free ways, you should use ParseDateTime() or ParseDate() instead. */ const char* ParseRfc822Date(const wxString& date, wxString::const_iterator* end = NULL); const char* ParseRfc822Date(const char* date); const wchar_t* ParseRfc822Date(const wchar_t* date); //@} //@{ /** This functions is like ParseDateTime(), but only allows the time to be specified in the input string. Returns @NULL if the conversion failed, otherwise return the pointer to the character which stopped the scan. */ const char* ParseTime(const wxString& time, wxString::const_iterator* end = NULL); const char* ParseTime(const char* time); const wchar_t* ParseTime(const wchar_t* time); //@} /** These functions convert wxDateTime objects to and from text. The conversions to text are mostly trivial: you can either do it using the default date and time representations for the current locale ( FormatDate() and wxDateTime::FormatTime), using the international standard representation defined by ISO 8601 ( FormatISODate(), FormatISOTime() and wxDateTime::FormatISOCombined) or by specifying any format at all and using Format() directly. The conversions from text are more interesting, as there are much more possibilities to care about. The simplest cases can be taken care of with ParseFormat() which can parse any date in the given (rigid) format. wxDateTime::ParseRfc822Date is another function for parsing dates in predefined format -- the one of RFC 822 which (still...) defines the format of email messages on the Internet. This format can not be described with @c strptime(3)-like format strings used by Format(), hence the need for a separate function. But the most interesting functions are ParseTime(), ParseDate() and ParseDateTime(). They try to parse the date ans time (or only one of them) in 'free' format, i.e. allow them to be specified in any of possible ways. These functions will usually be used to parse the (interactive) user input which is not bound to be in any predefined format. As an example, ParseDateTime() can parse the strings such as @c "tomorrow", @c "March first" and even @c "next Sunday". Finally notice that each of the parsing functions is available in several overloads: if the input string is a narrow (@c char *) string, then a narrow pointer is returned. If the input string is a wide string, a wide char pointer is returned. Finally, if the input parameter is a wxString, a narrow char pointer is also returned for backwards compatibility but there is also an additional argument of wxString::const_iterator type in which, if it is not @NULL, an iterator pointing to the end of the scanned string part is returned. ParseFormat() ParseDateTime() ParseDate() ParseTime() ParseISODate() ParseISOTime() ParseISOCombined() wxDateTime::ParseRfc822Date Format() FormatDate() FormatTime() FormatISOCombined() FormatISODate() FormatISOTime() */ /** Reset time to midnight (00:00:00) without changing the date. */ wxDateTime& ResetTime(); /** Sets the date and time from the parameters. */ wxDateTime Set(wxDateTime_t day, Month month = Inv_Month, int year = Inv_Year, wxDateTime_t hour = 0, wxDateTime_t minute = 0, wxDateTime_t second = 0, wxDateTime_t millisec = 0); /** Sets the country to use by default. This setting influences the DST calculations, date formatting and other things. The possible values for @a country parameter are enumerated in @ref overview_wxdatetime "wxDateTime constants section". @see GetCountry() */ static void SetCountry(Country country); /** Sets the day without changing other date components. */ wxDateTime& SetDay(short unsigned int); /** Sets the date from the date and time in DOS format. */ wxDateTime Set(unsigned long ddt); /** Sets the hour without changing other date components. */ wxDateTime& SetHour(short unsigned int); /** Sets the millisecond without changing other date components. */ wxDateTime& SetMillisecond(short unsigned int); /** Sets the minute without changing other date components. */ wxDateTime& SetMinute(short unsigned int); /** Sets the month without changing other date components. */ wxDateTime& SetMonth(Month month); /** Sets the second without changing other date components. */ wxDateTime& SetSecond(short unsigned int); /** Sets the date and time of to the current values. Same as assigning the result of Now() to this object. */ wxDateTime& SetToCurrent(); /** Sets the date to the last day in the specified month (the current one by default). Returns the reference to the modified object itself. */ wxDateTime SetToLastMonthDay(Month month = Inv_Month, int year = Inv_Year); /** The effect of calling this function is the same as of calling @c SetToWeekDay(-1, weekday, month, year). The date will be set to the last @a weekday in the given month and year (the current ones by default). Always returns @true. */ bool SetToLastWeekDay(WeekDay weekday, Month month = Inv_Month, int year = Inv_Year); /** Sets the date so that it will be the first @a weekday following the current date. Returns the reference to the modified object itself. */ wxDateTime& SetToNextWeekDay(WeekDay weekday); /** Sets the date so that it will be the last @a weekday before the current date. Returns the reference to the modified object itself. */ wxDateTime& SetToPrevWeekDay(WeekDay weekday); /** Sets the date to the @e n-th @a weekday in the given month of the given year (the current month and year are used by default). The parameter @e n may be either positive (counting from the beginning of the month) or negative (counting from the end of it). For example, @c SetToWeekDay(2, wxDateTime::Wed) will set the date to the second Wednesday in the current month and @c SetToWeekDay(-1, wxDateTime::Sun) -- to the last Sunday in it. Returns @true if the date was modified successfully, @false otherwise meaning that the specified date doesn't exist. */ bool SetToWeekDay(WeekDay weekday, int n = 1, Month month = Inv_Month, int year = Inv_Year); /** Adjusts the date so that it will still lie in the same week as before, but its week day will be the given one. Returns the reference to the modified object itself. */ wxDateTime SetToWeekDayInSameWeek(WeekDay weekday, WeekFlags flags = Monday_First); /** Set the date to the given @a weekday in the week number @a numWeek of the given @a year . The number should be in range 1...53. Note that the returned date may be in a different year than the one passed to this function because both the week 1 and week 52 or 53 (for leap years) contain days from different years. See GetWeekOfYear() for the explanation of how the year weeks are counted. */ static wxDateTime SetToWeekOfYear(int year, wxDateTime_t numWeek, WeekDay weekday = Mon); /** Sets the date to the day number @a yday in the same year (i.e., unlike the other functions, this one does not use the current year). The day number should be in the range 1...366 for the leap years and 1...365 for the other ones. Returns the reference to the modified object itself. */ wxDateTime& SetToYearDay(short unsigned int); /** Sets the year without changing other date components. */ wxDateTime& SetYear(int year); /** For convenience, all static functions are collected here. These functions either set or return the static variables of wxDateSpan (the country), return the current moment, year, month or number of days in it, or do some general calendar-related actions. Please note that although several function accept an extra @e Calendar parameter, it is currently ignored as only the Gregorian calendar is supported. Future versions will support other calendars. SetCountry() GetCountry() IsWestEuropeanCountry() GetCurrentYear() ConvertYearToBC() GetCurrentMonth() IsLeapYear() @ref getcenturystatic() GetCentury GetNumberOfDays() GetNumberOfDays() GetMonthName() GetWeekDayName() GetAmPmStrings() IsDSTApplicable() GetBeginDST() GetEndDST() Now() UNow() Today() */ /** Subtracts another date from this one and returns the difference between them as wxTimeSpan. */ wxTimeSpan Subtract(const wxDateTime& dt) const; /** Please see the @ref overview_tdatetimezones "time zone overview" for more information about time zones. Normally, these functions should be rarely used. FromTimezone() ToTimezone() MakeTimezone() MakeFromTimezone() ToUTC() MakeUTC() GetBeginDST() GetEndDST() IsDST() */ /** Transform the date to the given time zone. If @a noDST is @true, no DST adjustments will be made. Returns the date in the new time zone. */ wxDateTime ToTimezone(const TimeZone& tz, bool noDST = false) const; /** This is the same as calling ToTimezone() with the argument @c GMT0. */ wxDateTime ToUTC(bool noDST = false) const; /** Returns the object corresponding to the midnight of the current day (i.e. the same as Now(), but the time part is set to 0). @see Now() */ static wxDateTime Today(); /** Returns the object corresponding to the current time including the milliseconds if a function to get time with such precision is available on the current platform (supported under most Unices and Win32). @see Now() */ static wxDateTime UNow(); /** Same as @ref settm() Set. */ wxDateTime operator(const struct tm& tm); }; /** Global instance of an empty wxDateTime object. @todo wouldn't be better to rename it wxNullDateTime as for the rest of wx global objects which are initialized to an empty value? */ wxDateTime wxDefaultDateTime; /** @class wxDateTimeWorkDays @wxheader{datetime.h} @library{wxbase} @category{FIXME} */ class wxDateTimeWorkDays { public: }; /** @class wxDateSpan @wxheader{datetime.h} This class is a "logical time span" and is useful for implementing program logic for such things as "add one month to the date" which, in general, doesn't mean to add 60*60*24*31 seconds to it, but to take the same date the next month (to understand that this is indeed different consider adding one month to Feb, 15 -- we want to get Mar, 15, of course). When adding a month to the date, all lesser components (days, hours, ...) won't be changed unless the resulting date would be invalid: for example, Jan 31 + 1 month will be Feb 28, not (non-existing) Feb 31. Because of this feature, adding and subtracting back again the same wxDateSpan will @b not, in general give back the original date: Feb 28 - 1 month will be Jan 28, not Jan 31! wxDateSpan objects can be either positive or negative. They may be multiplied by scalars which multiply all deltas by the scalar: i.e. 2*(1 month and 1 day) is 2 months and 2 days. They can be added together and with wxDateTime or wxTimeSpan, but the type of result is different for each case. Beware about weeks: if you specify both weeks and days, the total number of days added will be 7*weeks + days! See also GetTotalDays() function. Equality operators are defined for wxDateSpans. Two datespans are equal if and only if they both give the same target date when added to @b every source date. Thus wxDateSpan::Months(1) is not equal to wxDateSpan::Days(30), because they don't give the same date when added to 1 Feb. But wxDateSpan::Days(14) is equal to wxDateSpan::Weeks(2) Finally, notice that for adding hours, minutes and so on you don't need this class at all: wxTimeSpan will do the job because there are no subtleties associated with those (we don't support leap seconds). @library{wxbase} @category{data} @see @ref overview_wxdatetimeoverview "Date classes overview", wxDateTime */ class wxDateSpan { public: /** Constructs the date span object for the given number of years, months, weeks and days. Note that the weeks and days add together if both are given. */ wxDateSpan(int years = 0, int months = 0, int weeks = 0, int days = 0); //@{ /** Returns the sum of two date spans. The first version returns a new object, the second and third ones modify this object in place. */ wxDateSpan Add(const wxDateSpan& other); const wxDateSpan& Add(const wxDateSpan& other); wxDateSpan operator+=(const wxDateSpan& other); //@} /** Returns a date span object corresponding to one day. @see Days() */ static wxDateSpan Day(); /** Returns a date span object corresponding to the given number of days. @see Day() */ static wxDateSpan Days(int days); /** Returns the number of days (only, that it not counting the weeks component!) in this date span. @see GetTotalDays() */ int GetDays() const; /** Returns the number of the months (not counting the years) in this date span. */ int GetMonths() const; /** Returns the combined number of days in this date span, counting both weeks and days. It still doesn't take neither months nor years into the account. @see GetWeeks(), GetDays() */ int GetTotalDays() const; /** Returns the number of weeks in this date span. @see GetTotalDays() */ int GetWeeks() const; /** Returns the number of years in this date span. */ int GetYears() const; /** Returns a date span object corresponding to one month. @see Months() */ static wxDateSpan Month(); /** Returns a date span object corresponding to the given number of months. @see Month() */ static wxDateSpan Months(int mon); //@{ /** Returns the product of the date span by the specified @e factor. The product is computed by multiplying each of the components by the factor. The first version returns a new object, the second and third ones modify this object in place. */ wxDateSpan Multiply(int factor); const wxDateSpan& Multiply(int factor); wxDateSpan operator*=(int factor); //@} //@{ /** Changes the sign of this date span. @see Negate() */ wxDateSpan Neg(); wxDateSpan operator-(); //@} /** Returns the date span with the opposite sign. @see Neg() */ wxDateSpan Negate() const; /** Sets the number of days (without modifying any other components) in this date span. */ wxDateSpan& SetDays(int n); /** Sets the number of months (without modifying any other components) in this date span. */ wxDateSpan& SetMonths(int n); /** Sets the number of weeks (without modifying any other components) in this date span. */ wxDateSpan& SetWeeks(int n); /** Sets the number of years (without modifying any other components) in this date span. */ wxDateSpan& SetYears(int n); //@{ /** Returns the difference of two date spans. The first version returns a new object, the second and third ones modify this object in place. */ wxDateSpan Subtract(const wxDateSpan& other); const wxDateSpan& Subtract(const wxDateSpan& other); wxDateSpan operator+=(const wxDateSpan& other); //@} /** Returns a date span object corresponding to one week. @see Weeks() */ static wxDateSpan Week(); /** Returns a date span object corresponding to the given number of weeks. @see Week() */ static wxDateSpan Weeks(int weeks); /** Returns a date span object corresponding to one year. @see Years() */ static wxDateSpan Year(); /** Returns a date span object corresponding to the given number of years. @see Year() */ static wxDateSpan Years(int years); /** Returns @true if this date span is different from the other one. */ bool operator!=(const wxDateSpan&) const; /** Returns @true if this date span is equal to the other one. Two date spans are considered equal if and only if they have the same number of years and months and the same total number of days (counting both days and weeks). */ bool operator==(const wxDateSpan&) const; }; /** @class wxTimeSpan @wxheader{datetime.h} wxTimeSpan class represents a time interval. @library{wxbase} @category{data} @see @ref overview_wxdatetimeoverview "Date classes overview", wxDateTime */ class wxTimeSpan { public: //@{ /** Constructs timespan from separate values for each component, with the date set to 0. Hours are not restricted to 0..24 range, neither are minutes, seconds or milliseconds. */ wxTimeSpan(); wxTimeSpan(long hours, long min, long sec, long msec); //@} /** Returns the absolute value of the timespan: does not modify the object. */ wxTimeSpan Abs() const; /** GetSeconds() GetMinutes() GetHours() GetDays() GetWeeks() GetValue() */ //@{ /** Returns the sum of two timespans. */ wxTimeSpan Add(const wxTimeSpan& diff); const wxTimeSpan& Add(const wxTimeSpan& diff); wxTimeSpan operator+=(const wxTimeSpan& diff); //@} /** @ref ctor() wxTimeSpan */ /** Returns the timespan for one day. */ static wxTimespan Day(); /** Returns the timespan for the given number of days. */ static wxTimespan Days(long days); /** Returns the string containing the formatted representation of the time span. The following format specifiers are allowed after %: H number of @b Hours M number of @b Minutes S number of @b Seconds l number of mi@b lliseconds D number of @b Days E number of w@b Eeks % the percent character Note that, for example, the number of hours in the description above is not well defined: it can be either the total number of hours (for example, for a time span of 50 hours this would be 50) or just the hour part of the time span, which would be 2 in this case as 50 hours is equal to 2 days and 2 hours. wxTimeSpan resolves this ambiguity in the following way: if there had been, indeed, the @c %D format specified preceding the @c %H, then it is interpreted as 2. Otherwise, it is 50. The same applies to all other format specifiers: if they follow a specifier of larger unit, only the rest part is taken, otherwise the full value is used. */ wxString Format(const wxString& = wxDefaultTimeSpanFormat) const; /** Format() */ /** Returns the difference in number of days. */ int GetDays() const; /** Returns the difference in number of hours. */ int GetHours() const; /** Returns the difference in number of milliseconds. */ wxLongLong GetMilliseconds() const; /** Returns the difference in number of minutes. */ int GetMinutes() const; /** Returns the difference in number of seconds. */ wxLongLong GetSeconds() const; /** Returns the internal representation of timespan. */ wxLongLong GetValue() const; /** Returns the difference in number of weeks. */ int GetWeeks() const; /** Returns the timespan for one hour. */ static wxTimespan Hour(); /** Returns the timespan for the given number of hours. */ static wxTimespan Hours(long hours); /** Returns @true if two timespans are equal. */ bool IsEqualTo(const wxTimeSpan& ts) const; /** Compares two timespans: works with the absolute values, i.e. -2 hours is longer than 1 hour. Also, it will return @false if the timespans are equal in absolute value. */ bool IsLongerThan(const wxTimeSpan& ts) const; /** Returns @true if the timespan is negative. */ bool IsNegative() const; /** Returns @true if the timespan is empty. */ bool IsNull() const; /** Returns @true if the timespan is positive. */ bool IsPositive() const; /** Compares two timespans: works with the absolute values, i.e. 1 hour is shorter than -2 hours. Also, it will return @false if the timespans are equal in absolute value. */ bool IsShorterThan(const wxTimeSpan& ts) const; /** Returns the timespan for one millisecond. */ static wxTimespan Millisecond(); /** Returns the timespan for the given number of milliseconds. */ static wxTimespan Milliseconds(long ms); /** Returns the timespan for one minute. */ static wxTimespan Minute(); /** Returns the timespan for the given number of minutes. */ static wxTimespan Minutes(long min); //@{ /** Multiplies timespan by a scalar. */ wxTimeSpan Multiply(int n); const wxTimeSpan& Multiply(int n); wxTimeSpan operator*=(int n); //@} //@{ /** Negate the value of the timespan. */ wxTimeSpan Neg(); wxTimeSpan operator-(); //@} /** Returns timespan with inverted sign. */ wxTimeSpan Negate() const; /** Add() Subtract() Multiply() Negate() Neg() Abs() */ /** Returns the timespan for one second. */ static wxTimespan Second(); /** Returns the timespan for the given number of seconds. */ static wxTimespan Seconds(long sec); /** Milliseconds() Millisecond() Seconds() Second() Minutes() Minute() Hours() Hour() Days() Day() Weeks() Week() */ //@{ /** Returns the difference of two timespans. */ wxTimeSpan Subtract(const wxTimeSpan& diff); const wxTimeSpan& Subtract(const wxTimeSpan& diff); wxTimeSpan operator-=(const wxTimeSpan& diff); //@} /** IsNull() IsPositive() IsNegative() IsEqualTo() IsLongerThan() IsShorterThan() */ /** Returns the timespan for one week. */ static wxTimespan Week(); /** Returns the timespan for the given number of weeks. */ static wxTimespan Weeks(long weeks); }; /** @class wxDateTimeHolidayAuthority @wxheader{datetime.h} @library{wxbase} @category{FIXME} */ class wxDateTimeHolidayAuthority { public: };