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Version: 3.0.3 |
#include <wx/datetime.h>
Detailed Description
wxDateTime class represents an absolute moment in time.
The type wxDateTime_t is typedefed as unsigned short and is used to contain the number of years, hours, minutes, seconds and milliseconds.
Global constant wxDefaultDateTime and synonym for it wxInvalidDateTime are defined. This constant will be different from any valid wxDateTime object.
Static Functions
All static 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 Calendar parameter, it is currently ignored as only the Gregorian calendar is supported. Future versions will support other calendars.
Date Formatting and Parsing
The date formatting and parsing 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 FormatTime()), using the international standard representation defined by ISO 8601 (FormatISODate(), FormatISOTime() and 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. 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 cannot be described with 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 and 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, ParseDate() can parse the strings such as "tomorrow", "March first" and even "next Sunday".
Finally notice that each of the parsing functions is available in several overloads: if the input string is a narrow (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.
Predefined objects/pointers:
- See also
- Date and Time, wxTimeSpan, wxDateSpan, wxCalendarCtrl
Classes | |
| class | TimeZone |
| Class representing a time zone. More... | |
| struct | Tm |
| Contains broken down date-time representation. More... | |
Public Types | |
| enum | TZ { Local, GMT_12, GMT_11, GMT_10, GMT_9, GMT_8, GMT_7, GMT_6, GMT_5, GMT_4, GMT_3, GMT_2, GMT_1, GMT0, GMT1, GMT2, GMT3, GMT4, GMT5, GMT6, GMT7, GMT8, GMT9, GMT10, GMT11, GMT12, GMT13, WET = GMT0, WEST = GMT1, CET = GMT1, CEST = GMT2, EET = GMT2, EEST = GMT3, MSK = GMT3, MSD = GMT4, AST = GMT_4, ADT = GMT_3, EST = GMT_5, EDT = GMT_4, CST = GMT_6, CDT = GMT_5, MST = GMT_7, MDT = GMT_6, PST = GMT_8, PDT = GMT_7, HST = GMT_10, AKST = GMT_9, AKDT = GMT_8, A_WST = GMT8, A_CST = GMT13 + 1, A_EST = GMT10, A_ESST = GMT11, NZST = GMT12, NZDT = GMT13, UTC = GMT0 } |
| Time zone symbolic names. More... | |
| enum | Calendar { Gregorian, Julian } |
| Several functions accept an extra parameter specifying the calendar to use (although most of them only support now the Gregorian calendar). More... | |
| enum | Country { Country_Unknown, Country_Default, Country_WesternEurope_Start, Country_EEC = Country_WesternEurope_Start, France, Germany, UK, Country_WesternEurope_End = UK, Russia, USA } |
| Date calculations often depend on the country and wxDateTime allows to set the country whose conventions should be used using SetCountry(). More... | |
| enum | Month { Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec, Inv_Month } |
| symbolic names for the months More... | |
| enum | WeekDay { Sun, Mon, Tue, Wed, Thu, Fri, Sat, Inv_WeekDay } |
| symbolic names for the weekdays More... | |
| enum | Year { Inv_Year = SHRT_MIN } |
| invalid value for the year More... | |
| enum | NameFlags { Name_Full = 0x01, Name_Abbr = 0x02 } |
| Flags to be used with GetMonthName() and GetWeekDayName() functions. More... | |
| enum | WeekFlags { Default_First, Monday_First, Sunday_First } |
| Different parts of the world use different conventions for the week start. More... | |
| typedef unsigned short | wxDateTime_t |
| A small unsigned integer type for storing things like minutes, seconds &c. More... | |
Public Member Functions | |
Constructors, Assignment Operators and Setters | |
| wxDateTime () | |
| Default constructor. More... | |
| wxDateTime (const wxDateTime &date) | |
| Copy constructor. More... | |
| wxDateTime (time_t timet) | |
| Same as Set(). More... | |
| wxDateTime (const struct tm &tm) | |
| Same as Set(). More... | |
| wxDateTime (double jdn) | |
| Same as Set(). More... | |
| wxDateTime (wxDateTime_t hour, wxDateTime_t minute=0, wxDateTime_t second=0, wxDateTime_t millisec=0) | |
| Same as Set(). More... | |
| wxDateTime (wxDateTime_t day, Month month, int year=Inv_Year, wxDateTime_t hour=0, wxDateTime_t minute=0, wxDateTime_t second=0, wxDateTime_t millisec=0) | |
| Same as Set(). More... | |
| wxDateTime (const struct _SYSTEMTIME &st) | |
| Same as SetFromMSWSysTime. More... | |
| wxDateTime & | ResetTime () |
| Reset time to midnight (00:00:00) without changing the date. More... | |
| wxDateTime & | Set (time_t timet) |
| Constructs the object from timet value holding the number of seconds since Jan 1, 1970 UTC. More... | |
| wxDateTime & | Set (const struct tm &tm) |
| Sets the date and time from the broken down representation in the standard tm structure. More... | |
| wxDateTime & | Set (const Tm &tm) |
| Sets the date and time from the broken down representation in the wxDateTime::Tm structure. More... | |
| wxDateTime & | Set (double jdn) |
| Sets the date from the so-called Julian Day Number. More... | |
| wxDateTime & | Set (wxDateTime_t hour, wxDateTime_t minute=0, wxDateTime_t second=0, wxDateTime_t millisec=0) |
| Sets the date to be equal to Today() and the time from supplied parameters. More... | |
| wxDateTime & | Set (wxDateTime_t day, Month month, int year=Inv_Year, wxDateTime_t hour=0, wxDateTime_t minute=0, wxDateTime_t second=0, wxDateTime_t millisec=0) |
| Sets the date and time from the parameters. More... | |
| wxDateTime & | SetDay (unsigned short day) |
| Sets the day without changing other date components. More... | |
| wxDateTime & | SetFromDOS (unsigned long ddt) |
| Sets the date from the date and time in DOS format. More... | |
| wxDateTime & | SetHour (unsigned short hour) |
| Sets the hour without changing other date components. More... | |
| wxDateTime & | SetMillisecond (unsigned short millisecond) |
| Sets the millisecond without changing other date components. More... | |
| wxDateTime & | SetMinute (unsigned short minute) |
| Sets the minute without changing other date components. More... | |
| wxDateTime & | SetMonth (Month month) |
| Sets the month without changing other date components. More... | |
| wxDateTime & | SetSecond (unsigned short second) |
| Sets the second without changing other date components. More... | |
| wxDateTime & | SetToCurrent () |
| Sets the date and time of to the current values. More... | |
| wxDateTime & | SetYear (int year) |
| Sets the year without changing other date components. More... | |
| wxDateTime & | operator= (time_t timet) |
| Same as Set(). More... | |
| wxDateTime & | operator= (const struct tm &tm) |
| Same as Set(). More... | |
Accessors | |
Here are the trivial accessors. Other functions, which might have to perform some more complicated calculations to find the answer are under the "Date Arithmetics" section. | |
| unsigned long | GetAsDOS () const |
| Returns the date and time in DOS format. More... | |
| wxDateTime & | SetFromMSWSysTime (const struct _SYSTEMTIME &st) |
| Initialize using the Windows SYSTEMTIME structure. More... | |
| void | GetAsMSWSysTime (struct _SYSTEMTIME *st) const |
| Returns the date and time in the Windows SYSTEMTIME format. More... | |
| int | GetCentury (const TimeZone &tz=Local) const |
| Returns the century of this date. More... | |
| wxDateTime | GetDateOnly () const |
| Returns the object having the same date component as this one but time of 00:00:00. More... | |
| unsigned short | GetDay (const TimeZone &tz=Local) const |
| Returns the day in the given timezone (local one by default). More... | |
| unsigned short | GetDayOfYear (const TimeZone &tz=Local) const |
| Returns the day of the year (in 1-366 range) in the given timezone (local one by default). More... | |
| unsigned short | GetHour (const TimeZone &tz=Local) const |
| Returns the hour in the given timezone (local one by default). More... | |
| unsigned short | GetMillisecond (const TimeZone &tz=Local) const |
| Returns the milliseconds in the given timezone (local one by default). More... | |
| unsigned short | GetMinute (const TimeZone &tz=Local) const |
| Returns the minute in the given timezone (local one by default). More... | |
| Month | GetMonth (const TimeZone &tz=Local) const |
| Returns the month in the given timezone (local one by default). More... | |
| unsigned short | GetSecond (const TimeZone &tz=Local) const |
| Returns the seconds in the given timezone (local one by default). More... | |
| time_t | GetTicks () const |
| Returns the number of seconds since Jan 1, 1970 UTC. More... | |
| Tm | GetTm (const TimeZone &tz=Local) const |
| Returns broken down representation of the date and time. More... | |
| WeekDay | GetWeekDay (const TimeZone &tz=Local) const |
| Returns the week day in the given timezone (local one by default). More... | |
| wxDateTime_t | GetWeekOfMonth (WeekFlags flags=Monday_First, const TimeZone &tz=Local) const |
| Returns the ordinal number of the week in the month (in 1-5 range). More... | |
| wxDateTime_t | GetWeekOfYear (WeekFlags flags=Monday_First, const TimeZone &tz=Local) const |
| Returns the number of the week of the year this date is in. More... | |
| int | GetYear (const TimeZone &tz=Local) const |
| Returns the year in the given timezone (local one by default). More... | |
| bool | IsValid () const |
| Returns true if the object represents a valid time moment. More... | |
| bool | IsWorkDay (Country country=Country_Default) const |
| Returns true is this day is not a holiday in the given country. More... | |
Date Comparison | |
There are several functions to allow date comparison. To supplement them, a few global operators, etc taking wxDateTime are defined. | |
| bool | IsEarlierThan (const wxDateTime &datetime) const |
| Returns true if this date precedes the given one. More... | |
| bool | IsEqualTo (const wxDateTime &datetime) const |
| Returns true if the two dates are strictly identical. More... | |
| bool | IsEqualUpTo (const wxDateTime &dt, const wxTimeSpan &ts) 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. More... | |
| bool | IsLaterThan (const wxDateTime &datetime) const |
| Returns true if this date is later than the given one. More... | |
| bool | IsSameDate (const wxDateTime &dt) const |
| Returns true if the date is the same without comparing the time parts. More... | |
| bool | IsSameTime (const wxDateTime &dt) const |
| Returns true if the time is the same (although dates may differ). More... | |
| bool | IsStrictlyBetween (const wxDateTime &t1, const wxDateTime &t2) const |
| Returns true if this date lies strictly between the two given dates. More... | |
| bool | IsBetween (const wxDateTime &t1, const wxDateTime &t2) const |
| Returns true if IsStrictlyBetween() is true or if the date is equal to one of the limit values. More... | |
Date Arithmetics | |
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 Add() and 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. | |
| wxDateTime | Add (const wxDateSpan &diff) const |
| Adds the given date span to this object. More... | |
| wxDateTime & | Add (const wxDateSpan &diff) |
| Adds the given date span to this object. More... | |
| wxDateTime | Add (const wxTimeSpan &diff) const |
| Adds the given time span to this object. More... | |
| wxDateTime & | Add (const wxTimeSpan &diff) |
| Adds the given time span to this object. More... | |
| wxDateTime | Subtract (const wxTimeSpan &diff) const |
| Subtracts the given time span from this object. More... | |
| wxDateTime & | Subtract (const wxTimeSpan &diff) |
| Subtracts the given time span from this object. More... | |
| wxDateTime | Subtract (const wxDateSpan &diff) const |
| Subtracts the given date span from this object. More... | |
| wxDateTime & | Subtract (const wxDateSpan &diff) |
| Subtracts the given date span from this object. More... | |
| wxTimeSpan | Subtract (const wxDateTime &dt) const |
| Subtracts another date from this one and returns the difference between them as a wxTimeSpan. More... | |
| wxDateSpan | DiffAsDateSpan (const wxDateTime &dt) const |
| Returns the difference between this object and dt as a wxDateSpan. More... | |
| wxDateTime & | operator+= (const wxDateSpan &diff) |
| Adds the given date span to this object. More... | |
| wxDateTime | operator+ (const wxDateSpan &ds) const |
| Adds the given date span to this object. More... | |
| wxDateTime & | operator-= (const wxDateSpan &diff) |
| Subtracts the given date span from this object. More... | |
| wxDateTime | operator- (const wxDateSpan &ds) const |
| Subtracts the given date span from this object. More... | |
| wxDateTime & | operator+= (const wxTimeSpan &diff) |
| Adds the given time span to this object. More... | |
| wxDateTime | operator+ (const wxTimeSpan &ts) const |
| Adds the given time span to this object. More... | |
| wxDateTime & | operator-= (const wxTimeSpan &diff) |
| Subtracts the given time span from this object. More... | |
| wxDateTime | operator- (const wxTimeSpan &ts) const |
| Subtracts the given time span from this object. More... | |
| wxTimeSpan | operator- (const wxDateTime &dt2) const |
| Subtracts another date from this one and returns the difference between them as a wxTimeSpan. More... | |
Date Formatting and Parsing | |
| wxString | Format (const wxString &format=wxDefaultDateTimeFormat, const TimeZone &tz=Local) const |
This function does the same as the standard ANSI C strftime(3) function (http://www.cplusplus.com/reference/clibrary/ctime/strftime.html). More... | |
| wxString | FormatDate () const |
Identical to calling Format() with "%x" argument (which means "preferred date representation for the current locale"). More... | |
| wxString | FormatISOCombined (char sep= 'T') const |
Returns the combined date-time representation in the ISO 8601 format "YYYY-MM-DDTHH:MM:SS". More... | |
| wxString | FormatISODate () const |
This function returns the date representation in the ISO 8601 format "YYYY-MM-DD". More... | |
| wxString | FormatISOTime () const |
This function returns the time representation in the ISO 8601 format "HH:MM:SS". More... | |
| wxString | FormatTime () const |
Identical to calling Format() with "%X" argument (which means "preferred time representation for the current locale"). More... | |
| bool | ParseDate (const wxString &date, wxString::const_iterator *end) |
| This function is like ParseDateTime(), but it only allows the date to be specified. More... | |
| bool | ParseDateTime (const wxString &datetime, wxString::const_iterator *end) |
| Parses the string datetime containing the date and time in free format. More... | |
| bool | ParseFormat (const wxString &date, const wxString &format, const wxDateTime &dateDef, wxString::const_iterator *end) |
| This function parses the string date according to the given format. More... | |
| bool | ParseFormat (const wxString &date, const wxString &format, wxString::const_iterator *end) |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| bool | ParseFormat (const wxString &date, wxString::const_iterator *end) |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More... | |
| bool | ParseISOCombined (const wxString &date, char sep= 'T') |
This function parses the string containing the date and time in ISO 8601 combined format "YYYY-MM-DDTHH:MM:SS". More... | |
| bool | ParseISODate (const wxString &date) |
This function parses the date in ISO 8601 format "YYYY-MM-DD". More... | |
| bool | ParseISOTime (const wxString &date) |
This function parses the time in ISO 8601 format "HH:MM:SS". More... | |
| bool | ParseRfc822Date (const wxString &date, wxString::const_iterator *end) |
| Parses the string date looking for a date formatted according to the RFC 822 in it. More... | |
| bool | ParseTime (const wxString &time, wxString::const_iterator *end) |
| This functions is like ParseDateTime(), but only allows the time to be specified in the input string. More... | |
Calendar Calculations | |
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. None of the functions in this section modify the time part of the wxDateTime, they only work with the date part of it. | |
| wxDateTime | GetLastMonthDay (Month month=Inv_Month, int year=Inv_Year) const |
| Returns the copy of this object to which SetToLastMonthDay() was applied. More... | |
| wxDateTime | GetLastWeekDay (WeekDay weekday, Month month=Inv_Month, int year=Inv_Year) |
| Returns the copy of this object to which SetToLastWeekDay() was applied. More... | |
| wxDateTime | GetNextWeekDay (WeekDay weekday) const |
| Returns the copy of this object to which SetToNextWeekDay() was applied. More... | |
| wxDateTime | GetPrevWeekDay (WeekDay weekday) const |
| Returns the copy of this object to which SetToPrevWeekDay() was applied. More... | |
| wxDateTime | GetWeekDay (WeekDay weekday, int n=1, Month month=Inv_Month, int year=Inv_Year) const |
| Returns the copy of this object to which SetToWeekDay() was applied. More... | |
| wxDateTime | GetWeekDayInSameWeek (WeekDay weekday, WeekFlags flags=Monday_First) const |
| Returns the copy of this object to which SetToWeekDayInSameWeek() was applied. More... | |
| wxDateTime | GetYearDay (wxDateTime_t yday) const |
| Returns the copy of this object to which SetToYearDay() was applied. More... | |
| wxDateTime & | SetToLastMonthDay (Month month=Inv_Month, int year=Inv_Year) |
| Sets the date to the last day in the specified month (the current one by default). More... | |
| bool | SetToLastWeekDay (WeekDay weekday, Month month=Inv_Month, int year=Inv_Year) |
The effect of calling this function is the same as of calling SetToWeekDay(-1, weekday, month, year). More... | |
| wxDateTime & | SetToNextWeekDay (WeekDay weekday) |
| Sets the date so that it will be the first weekday following the current date. More... | |
| wxDateTime & | SetToPrevWeekDay (WeekDay weekday) |
| Sets the date so that it will be the last weekday before the current date. More... | |
| bool | SetToWeekDay (WeekDay weekday, int n=1, Month month=Inv_Month, int year=Inv_Year) |
| Sets the date to the n-th weekday in the given month of the given year (the current month and year are used by default). More... | |
| wxDateTime & | SetToWeekDayInSameWeek (WeekDay weekday, WeekFlags flags=Monday_First) |
| Adjusts the date so that it will still lie in the same week as before, but its week day will be the given one. More... | |
| wxDateTime & | SetToYearDay (wxDateTime_t yday) |
| Sets the date to the day number yday in the same year (i.e. unlike the other functions, this one does not use the current year). More... | |
Astronomical/Historical Functions | |
Some degree of support for the date units used in astronomy and/or history is provided. You can construct a wxDateTime object from a JDN and you may also get its JDN, MJD or Rata Die number from it. Related functions in other groups: wxDateTime(double), Set(double) | |
| double | GetJDN () const |
| Synonym for GetJulianDayNumber(). More... | |
| double | GetJulianDayNumber () const |
| Returns the JDN corresponding to this date. More... | |
| double | GetMJD () const |
| Synonym for GetModifiedJulianDayNumber(). More... | |
| double | GetModifiedJulianDayNumber () const |
| Returns the "Modified Julian Day Number" (MJD) which is, by definition, is equal to JDN - 2400000.5. More... | |
| double | GetRataDie () const |
| Return the Rata Die number of this date. More... | |
Time Zone and DST Support | |
Please see the time zone overview for more information about time zones. Normally, these functions should be rarely used. Related functions in other groups: GetBeginDST(), GetEndDST() | |
| wxDateTime | FromTimezone (const TimeZone &tz, bool noDST=false) const |
| Transform the date from the given time zone to the local one. More... | |
| int | IsDST (Country country=Country_Default) const |
| Returns true if the DST is applied for this date in the given country. More... | |
| wxDateTime & | MakeFromTimezone (const TimeZone &tz, bool noDST=false) |
| Same as FromTimezone() but modifies the object in place. More... | |
| wxDateTime & | MakeTimezone (const TimeZone &tz, bool noDST=false) |
| Modifies the object in place to represent the date in another time zone. More... | |
| wxDateTime & | MakeUTC (bool noDST=false) |
This is the same as calling MakeTimezone() with the argument GMT0. More... | |
| wxDateTime | ToTimezone (const TimeZone &tz, bool noDST=false) const |
| Transform the date to the given time zone. More... | |
| wxDateTime | ToUTC (bool noDST=false) const |
This is the same as calling ToTimezone() with the argument GMT0. More... | |
Static Public Member Functions | |
| static int | ConvertYearToBC (int year) |
| Converts the year in absolute notation (i.e. a number which can be negative, positive or zero) to the year in BC/AD notation. More... | |
| static void | GetAmPmStrings (wxString *am, wxString *pm) |
Returns the translations of the strings AM and PM used for time formatting for the current locale. More... | |
| static wxDateTime | GetBeginDST (int year=Inv_Year, Country country=Country_Default) |
| Get the beginning of DST for the given country in the given year (current one by default). More... | |
| static wxDateTime | GetEndDST (int year=Inv_Year, Country country=Country_Default) |
| Returns the end of DST for the given country in the given year (current one by default). More... | |
| static int | GetCentury (int year) |
| Get the current century, i.e. first two digits of the year, in given calendar (only Gregorian is currently supported). More... | |
| static Country | GetCountry () |
| Returns the current default country. More... | |
| static Month | GetCurrentMonth (Calendar cal=Gregorian) |
| Get the current month in given calendar (only Gregorian is currently supported). More... | |
| static int | GetCurrentYear (Calendar cal=Gregorian) |
| Get the current year in given calendar (only Gregorian is currently supported). More... | |
| static wxString | GetEnglishMonthName (Month month, NameFlags flags=Name_Full) |
| Return the standard English name of the given month. More... | |
| static wxString | GetEnglishWeekDayName (WeekDay weekday, NameFlags flags=Name_Full) |
| Return the standard English name of the given week day. More... | |
| static wxString | GetMonthName (Month month, NameFlags flags=Name_Full) |
| Gets the full (default) or abbreviated name of the given month. More... | |
| static wxDateTime_t | GetNumberOfDays (int year, Calendar cal=Gregorian) |
| Returns the number of days in the given year. More... | |
| static wxDateTime_t | GetNumberOfDays (Month month, int year=Inv_Year, Calendar cal=Gregorian) |
| Returns the number of days in the given month of the given year. More... | |
| static time_t | GetTimeNow () |
| Returns the current time. More... | |
| static tm * | GetTmNow (struct tm *tm) |
| Returns the current time broken down using the buffer whose address is passed to the function with tm to store the result. More... | |
| static tm * | GetTmNow () |
| Returns the current time broken down. More... | |
| static wxString | GetWeekDayName (WeekDay weekday, NameFlags flags=Name_Full) |
| Gets the full (default) or abbreviated name of the given week day. More... | |
| static bool | IsDSTApplicable (int year=Inv_Year, Country country=Country_Default) |
| Returns true if DST was used in the given year (the current one by default) in the given country. More... | |
| static bool | IsLeapYear (int year=Inv_Year, Calendar cal=Gregorian) |
| Returns true if the year is a leap one in the specified calendar. More... | |
| static bool | IsWestEuropeanCountry (Country country=Country_Default) |
| This function returns true if the specified (or default) country is one of Western European ones. More... | |
| static wxDateTime | Now () |
| Returns the object corresponding to the current time. More... | |
| static void | SetCountry (Country country) |
| Sets the country to use by default. More... | |
| static wxDateTime | SetToWeekOfYear (int year, wxDateTime_t numWeek, WeekDay weekday=Mon) |
| Set the date to the given weekday in the week number numWeek of the given year . More... | |
| static wxDateTime | Today () |
| 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). More... | |
| static wxDateTime | UNow () |
| Returns the object corresponding to the current UTC time including the milliseconds. More... | |
Member Typedef Documentation
| typedef unsigned short wxDateTime::wxDateTime_t |
A small unsigned integer type for storing things like minutes, seconds &c.
It should be at least short (i.e. not char) to contain the number of milliseconds - it may also be 'int' because there is no size penalty associated with it in our code, we don't store any data in this format.
Member Enumeration Documentation
| enum wxDateTime::Calendar |
Several functions accept an extra parameter specifying the calendar to use (although most of them only support now the Gregorian calendar).
This parameters is one of the following values.
| Enumerator | |
|---|---|
| Gregorian |
calendar currently in use in Western countries |
| Julian |
calendar in use since -45 until the 1582 (or later) |
| enum wxDateTime::Country |
Date calculations often depend on the country and wxDateTime allows to set the country whose conventions should be used using SetCountry().
It takes one of the following values as parameter.
| Enumerator | |
|---|---|
| Country_Unknown |
no special information for this country |
| Country_Default |
set the default country with SetCountry() method or use the default country with any other |
| Country_WesternEurope_Start | |
| Country_EEC | |
| France | |
| Germany | |
| UK | |
| Country_WesternEurope_End | |
| Russia | |
| USA | |
| enum wxDateTime::Month |
Flags to be used with GetMonthName() and GetWeekDayName() functions.
| Enumerator | |
|---|---|
| Name_Full |
return full name |
| Name_Abbr |
return abbreviated name |
| enum wxDateTime::TZ |
Time zone symbolic names.
| enum wxDateTime::WeekDay |
Different parts of the world use different conventions for the week start.
In some countries, the week starts on Sunday, while in others – on Monday. The ISO standard doesn't address this issue, so we support both conventions in the functions whose result depends on it (GetWeekOfYear() and GetWeekOfMonth()).
The desired behaviour may be specified by giving one of the following constants as argument to these functions.
| Enumerator | |
|---|---|
| Default_First |
Sunday_First for US, Monday_First for the rest. |
| Monday_First |
week starts with a Monday |
| Sunday_First |
week starts with a Sunday |
| enum wxDateTime::Year |
Constructor & Destructor Documentation
| wxDateTime::wxDateTime | ( | ) |
Default constructor.
Use one of the Set() functions to initialize the object later.
| wxDateTime::wxDateTime | ( | const wxDateTime & | date | ) |
Copy constructor.
| wxDateTime::wxDateTime | ( | time_t | timet | ) |
Same as Set().
| wxDateTime::wxDateTime | ( | const struct tm & | tm | ) |
Same as Set().
| wxDateTime::wxDateTime | ( | double | jdn | ) |
Same as Set().
| wxDateTime::wxDateTime | ( | wxDateTime_t | hour, |
| wxDateTime_t | minute = 0, |
||
| wxDateTime_t | second = 0, |
||
| wxDateTime_t | millisec = 0 |
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| ) |
Same as Set().
| wxDateTime::wxDateTime | ( | wxDateTime_t | day, |
| Month | month, | ||
| int | year = Inv_Year, |
||
| wxDateTime_t | hour = 0, |
||
| wxDateTime_t | minute = 0, |
||
| wxDateTime_t | second = 0, |
||
| wxDateTime_t | millisec = 0 |
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| ) |
Same as Set().
| wxDateTime::wxDateTime | ( | const struct _SYSTEMTIME & | st | ) |
Same as SetFromMSWSysTime.
- Parameters
-
st Input, Windows SYSTEMTIME reference
- Since
- 2.9.0
- Remarks
- MSW only Availability: only available for the wxMSW port.
Member Function Documentation
| wxDateTime wxDateTime::Add | ( | const wxDateSpan & | diff | ) | const |
Adds the given date span to this object.
| wxDateTime& wxDateTime::Add | ( | const wxDateSpan & | diff | ) |
Adds the given date span to this object.
| wxDateTime wxDateTime::Add | ( | const wxTimeSpan & | diff | ) | const |
Adds the given time span to this object.
| wxDateTime& wxDateTime::Add | ( | const wxTimeSpan & | diff | ) |
Adds the given time span to this object.
|
static |
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:
| wxDateSpan wxDateTime::DiffAsDateSpan | ( | const wxDateTime & | dt | ) | const |
Returns the difference between this object and dt as a wxDateSpan.
This method allows to find the number of entire years, months, weeks and days between dt and this date.
- Since
- 2.9.5
| wxString wxDateTime::Format | ( | const wxString & | format = wxDefaultDateTimeFormat, |
| const TimeZone & | tz = Local |
||
| ) | const |
This function does the same as the standard ANSI C strftime(3) function (http://www.cplusplus.com/reference/clibrary/ctime/strftime.html).
Please see its description for the meaning of format parameter.
Notice that POSIX "%g", "%G", "%V" and "%z" format specifiers are supported even if the standard library doesn't support them (e.g. MSVC).
It also accepts a few wxWidgets-specific extensions: you can optionally specify the width of the field to follow using printf(3)-like syntax and the format specification "%l" can be used to get the number of milliseconds.
- See also
- ParseFormat()
| wxString wxDateTime::FormatDate | ( | ) | const |
Identical to calling Format() with "%x" argument (which means "preferred date representation for the current locale").
| wxString wxDateTime::FormatISOCombined | ( | char | sep = 'T' | ) | const |
Returns the combined date-time representation in the ISO 8601 format "YYYY-MM-DDTHH:MM:SS".
The sep parameter default value produces the result exactly corresponding to the ISO standard, but it can also be useful to use a space as separator if a more human-readable combined date-time representation is needed.
- See also
- FormatISODate(), FormatISOTime(), ParseISOCombined()
| wxString wxDateTime::FormatISODate | ( | ) | const |
This function returns the date representation in the ISO 8601 format "YYYY-MM-DD".
| wxString wxDateTime::FormatISOTime | ( | ) | const |
This function returns the time representation in the ISO 8601 format "HH:MM:SS".
| wxString wxDateTime::FormatTime | ( | ) | const |
Identical to calling Format() with "%X" argument (which means "preferred time representation for the current locale").
| wxDateTime wxDateTime::FromTimezone | ( | const TimeZone & | tz, |
| bool | noDST = false |
||
| ) | const |
Transform the date from the given time zone to the local one.
If noDST is true, no DST adjustments will be made.
Notice using wxDateTime::Local for tz parameter doesn't really make sense and may result in unexpected results as it will return a different object when DST is in use and noDST has its default value of false.
- Returns
- The date adjusted by the different between the given and the local time zones.
Returns the translations of the strings AM and PM used for time formatting for the current locale.
Either of the pointers may be NULL if the corresponding value is not needed.
| unsigned long wxDateTime::GetAsDOS | ( | ) | const |
Returns the date and time in DOS format.
| void wxDateTime::GetAsMSWSysTime | ( | struct _SYSTEMTIME * | st | ) | const |
Returns the date and time in the Windows SYSTEMTIME format.
- Parameters
-
st Output, pointer to Windows SYSTEMTIME
- Since
- 2.9.0
- Remarks
- MSW only Availability: only available for the wxMSW port.
|
static |
Get the beginning of DST for the given country in the given year (current one by default).
This function suffers from limitations described in the DST overview.
- See also
- GetEndDST()
|
static |
Get the current century, i.e. first two digits of the year, in given calendar (only Gregorian is currently supported).
|
static |
Returns the current default country.
The default country is used for DST calculations, for example.
- See also
- SetCountry()
Get the current month in given calendar (only Gregorian is currently supported).
Get the current year in given calendar (only Gregorian is currently supported).
| wxDateTime wxDateTime::GetDateOnly | ( | ) | const |
Returns the object having the same date component as this one but time of 00:00:00.
- Since
- 2.8.2
- See also
- ResetTime()
Returns the day in the given timezone (local one by default).
Returns the day of the year (in 1-366 range) in the given timezone (local one by default).
|
static |
Returns the end of DST for the given country in the given year (current one by default).
- See also
- GetBeginDST()
Return the standard English name of the given month.
This function always returns "January" or "Jan" for January, use GetMonthName() to retrieve the name of the month in the users current locale.
- Parameters
-
month One of wxDateTime::Jan, ..., wxDateTime::Dec values. flags Either Name_Full (default) or Name_Abbr.
- See also
- GetEnglishWeekDayName()
- Since
- 2.9.0
|
static |
Return the standard English name of the given week day.
This function always returns "Monday" or "Mon" for Monday, use GetWeekDayName() to retrieve the name of the month in the users current locale.
- Parameters
-
weekday One of wxDateTime::Sun, ..., wxDateTime::Sat values. flags Either Name_Full (default) or Name_Abbr.
- See also
- GetEnglishMonthName()
- Since
- 2.9.0
Returns the hour in the given timezone (local one by default).
| double wxDateTime::GetJDN | ( | ) | const |
Synonym for GetJulianDayNumber().
| double wxDateTime::GetJulianDayNumber | ( | ) | const |
Returns the JDN corresponding to this date.
Beware of rounding errors!
- See also
- GetModifiedJulianDayNumber()
| wxDateTime wxDateTime::GetLastMonthDay | ( | Month | month = Inv_Month, |
| int | year = Inv_Year |
||
| ) | const |
Returns the copy of this object to which SetToLastMonthDay() was applied.
| wxDateTime wxDateTime::GetLastWeekDay | ( | WeekDay | weekday, |
| Month | month = Inv_Month, |
||
| int | year = Inv_Year |
||
| ) |
Returns the copy of this object to which SetToLastWeekDay() was applied.
Returns the milliseconds in the given timezone (local one by default).
Returns the minute in the given timezone (local one by default).
| double wxDateTime::GetMJD | ( | ) | const |
Synonym for GetModifiedJulianDayNumber().
| double wxDateTime::GetModifiedJulianDayNumber | ( | ) | const |
Returns the "Modified Julian Day Number" (MJD) which is, by definition, is 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 the noons like JDN. The MJD 0 represents Nov 17, 1858.
Returns the month in the given timezone (local one by default).
Gets the full (default) or abbreviated name of the given month.
This function returns the name in the current locale, use GetEnglishMonthName() to get the untranslated name if necessary.
- Parameters
-
month One of wxDateTime::Jan, ..., wxDateTime::Dec values. flags Either Name_Full (default) or Name_Abbr.
- See also
- GetWeekDayName()
| wxDateTime wxDateTime::GetNextWeekDay | ( | WeekDay | weekday | ) | const |
Returns the copy of this object to which SetToNextWeekDay() was applied.
|
static |
Returns the number of days in the given year.
The only supported value for cal currently is Gregorian.
|
static |
Returns the number of days in the given month of the given year.
The only supported value for cal currently is Gregorian.
| wxDateTime wxDateTime::GetPrevWeekDay | ( | WeekDay | weekday | ) | const |
Returns the copy of this object to which SetToPrevWeekDay() was applied.
| double wxDateTime::GetRataDie | ( | ) | const |
Return the 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.
Returns the seconds in the given timezone (local one by default).
| time_t wxDateTime::GetTicks | ( | ) | const |
Returns the number of seconds since Jan 1, 1970 UTC.
An assert failure will occur if the date is not in the range covered by time_t type, use GetValue() if you work with dates outside of it.
|
static |
Returns the current time.
Returns broken down representation of the date and time.
|
static |
Returns the current time broken down using the buffer whose address is passed to the function with tm to store the result.
|
static |
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 GetTmNow(struct tm *) instead.
Returns the week day in the given timezone (local one by default).
| wxDateTime wxDateTime::GetWeekDay | ( | WeekDay | weekday, |
| int | n = 1, |
||
| Month | month = Inv_Month, |
||
| int | year = Inv_Year |
||
| ) | const |
Returns the copy of this object to which SetToWeekDay() was applied.
| wxDateTime wxDateTime::GetWeekDayInSameWeek | ( | WeekDay | weekday, |
| WeekFlags | flags = Monday_First |
||
| ) | const |
Returns the copy of this object to which SetToWeekDayInSameWeek() was applied.
Gets the full (default) or abbreviated name of the given week day.
This function returns the name in the current locale, use GetEnglishWeekDayName() to get the untranslated name if necessary.
- Parameters
-
weekday One of wxDateTime::Sun, ..., wxDateTime::Sat values. flags Either Name_Full (default) or Name_Abbr.
- See also
- GetMonthName()
| wxDateTime_t wxDateTime::GetWeekOfMonth | ( | WeekFlags | flags = Monday_First, |
| const TimeZone & | tz = Local |
||
| ) | const |
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.
| wxDateTime_t wxDateTime::GetWeekOfYear | ( | 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 week start convention specified by the flags argument but its results for Sunday_First are not well-defined as the ISO definition quoted above applies to the weeks starting on Monday only.
Returns the year in the given timezone (local one by default).
| wxDateTime wxDateTime::GetYearDay | ( | wxDateTime_t | yday | ) | const |
Returns the copy of this object to which SetToYearDay() was applied.
| bool wxDateTime::IsBetween | ( | const wxDateTime & | t1, |
| const wxDateTime & | t2 | ||
| ) | const |
Returns true if IsStrictlyBetween() is true or if the date is equal to one of the limit values.
- See also
- IsStrictlyBetween()
| int wxDateTime::IsDST | ( | Country | country = Country_Default | ) | const |
Returns true if the DST is applied for this date in the given country.
- See also
- GetBeginDST(), GetEndDST()
|
static |
Returns true if DST was used in the given year (the current one by default) in the given country.
| bool wxDateTime::IsEarlierThan | ( | const wxDateTime & | datetime | ) | const |
Returns true if this date precedes the given one.
| bool wxDateTime::IsEqualTo | ( | const wxDateTime & | datetime | ) | const |
Returns true if the two dates are strictly identical.
| bool wxDateTime::IsEqualUpTo | ( | const wxDateTime & | dt, |
| const wxTimeSpan & | ts | ||
| ) | 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 wxDateTime::IsLaterThan | ( | const wxDateTime & | datetime | ) | const |
Returns true if this date is later than the given one.
Returns true if the year is a leap one in the specified calendar.
This functions supports Gregorian and Julian calendars.
| bool wxDateTime::IsSameDate | ( | const wxDateTime & | dt | ) | const |
Returns true if the date is the same without comparing the time parts.
| bool wxDateTime::IsSameTime | ( | const wxDateTime & | dt | ) | const |
Returns true if the time is the same (although dates may differ).
| bool wxDateTime::IsStrictlyBetween | ( | const wxDateTime & | t1, |
| const wxDateTime & | t2 | ||
| ) | const |
Returns true if this date lies strictly between the two given dates.
- See also
- IsBetween()
| bool wxDateTime::IsValid | ( | ) | const |
Returns true if the object represents a valid time moment.
|
static |
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.
| bool wxDateTime::IsWorkDay | ( | Country | country = Country_Default | ) | const |
Returns true is this day is not a holiday in the given country.
| wxDateTime& wxDateTime::MakeFromTimezone | ( | const TimeZone & | tz, |
| bool | noDST = false |
||
| ) |
Same as FromTimezone() but modifies the object in place.
| wxDateTime& wxDateTime::MakeTimezone | ( | const TimeZone & | tz, |
| bool | noDST = false |
||
| ) |
Modifies the object in place to represent the date in another time zone.
If noDST is true, no DST adjustments will be made.
| wxDateTime& wxDateTime::MakeUTC | ( | bool | noDST = false | ) |
This is the same as calling MakeTimezone() with the argument GMT0.
|
static |
Returns the object corresponding to the current time.
Example:
- Note
- This function is accurate up to seconds. UNow() can be used if better precision is required.
- See also
- Today()
| wxDateTime wxDateTime::operator+ | ( | const wxDateSpan & | ds | ) | const |
Adds the given date span to this object.
| wxDateTime wxDateTime::operator+ | ( | const wxTimeSpan & | ts | ) | const |
Adds the given time span to this object.
| wxDateTime& wxDateTime::operator+= | ( | const wxDateSpan & | diff | ) |
Adds the given date span to this object.
| wxDateTime& wxDateTime::operator+= | ( | const wxTimeSpan & | diff | ) |
Adds the given time span to this object.
| wxDateTime wxDateTime::operator- | ( | const wxDateSpan & | ds | ) | const |
Subtracts the given date span from this object.
| wxDateTime wxDateTime::operator- | ( | const wxTimeSpan & | ts | ) | const |
Subtracts the given time span from this object.
| wxTimeSpan wxDateTime::operator- | ( | const wxDateTime & | dt2 | ) | const |
Subtracts another date from this one and returns the difference between them as a wxTimeSpan.
| wxDateTime& wxDateTime::operator-= | ( | const wxDateSpan & | diff | ) |
Subtracts the given date span from this object.
| wxDateTime& wxDateTime::operator-= | ( | const wxTimeSpan & | diff | ) |
Subtracts the given time span from this object.
| wxDateTime& wxDateTime::operator= | ( | time_t | timet | ) |
Same as Set().
| wxDateTime& wxDateTime::operator= | ( | const struct tm & | tm | ) |
Same as Set().
| bool wxDateTime::ParseDate | ( | const wxString & | date, |
| wxString::const_iterator * | end | ||
| ) |
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.
See ParseFormat() for the description of function parameters and return value.
- See also
- Format()
| bool wxDateTime::ParseDateTime | ( | const wxString & | datetime, |
| wxString::const_iterator * | end | ||
| ) |
Parses the string 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 ParseRfc822Date(), it will accept anything that may be accepted and will only reject strings which cannot be parsed in any way at all. Notice that the function will fail if either date or time part is present but not both, use ParseDate() or ParseTime() to parse strings containing just the date or time component.
See ParseFormat() for the description of function parameters and return value.
| bool wxDateTime::ParseFormat | ( | const wxString & | date, |
| const wxString & | format, | ||
| const wxDateTime & | dateDef, | ||
| wxString::const_iterator * | end | ||
| ) |
This function parses the string date according to the given format.
The system 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", "%x" or "%X" may not be perfect and GNU extensions such as "%z" and "%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 strftime(3) for the syntax of the format string.
The dateDef parameter is used to fill in the fields which could not be determined from the format string. For example, if the format is "%d" (the day of the month), the month and the year are taken from dateDef. If it is not specified, Today() is used as the default date.
Example of using this function:
- Parameters
-
date The string to be parsed. format strptime()-like format string. dateDef Used to fill in the date components not specified in the date string. end Will be filled with the iterator pointing to the location where the parsing stopped if the function returns true. If the entire string was consumed, it is set to date.end(). Notice that this argument must be non-NULL.
- Returns
- true if at least part of the string was parsed successfully, false otherwise.
- See also
- Format()
| bool wxDateTime::ParseFormat | ( | const wxString & | date, |
| const wxString & | format, | ||
| wxString::const_iterator * | end | ||
| ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
| bool wxDateTime::ParseFormat | ( | const wxString & | date, |
| wxString::const_iterator * | end | ||
| ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
| bool wxDateTime::ParseISOCombined | ( | const wxString & | date, |
| char | sep = 'T' |
||
| ) |
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 sep for the function to succeed.
- Returns
- true if the entire string was parsed successfully, false otherwise.
| bool wxDateTime::ParseISODate | ( | const wxString & | date | ) |
This function parses the date in ISO 8601 format "YYYY-MM-DD".
- Returns
- true if the entire string was parsed successfully, false otherwise.
| bool wxDateTime::ParseISOTime | ( | 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 wxDateTime::ParseRfc822Date | ( | const wxString & | date, |
| wxString::const_iterator * | end | ||
| ) |
Parses the string 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 "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 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.
See ParseFormat() for the description of function parameters and return value.
| bool wxDateTime::ParseTime | ( | const wxString & | time, |
| wxString::const_iterator * | end | ||
| ) |
This functions is like ParseDateTime(), but only allows the time to be specified in the input string.
See ParseFormat() for the description of function parameters and return value.
| wxDateTime& wxDateTime::ResetTime | ( | ) |
Reset time to midnight (00:00:00) without changing the date.
| wxDateTime& wxDateTime::Set | ( | time_t | timet | ) |
Constructs the object from timet value holding the number of seconds since Jan 1, 1970 UTC.
If timet is invalid, i.e.
, wxDateTime becomes invalid too, i.e. its IsValid() will return false.
| wxDateTime& wxDateTime::Set | ( | const struct tm & | tm | ) |
Sets the date and time from the broken down representation in the standard tm structure.
| wxDateTime& wxDateTime::Set | ( | const Tm & | tm | ) |
Sets the date and time from the broken down representation in the wxDateTime::Tm structure.
| wxDateTime& wxDateTime::Set | ( | double | jdn | ) |
Sets the date from the so-called Julian Day Number.
By definition, the Julian Day Number, usually abbreviated as JDN, of a particular instant is the fractional number of days since 12 hours Universal Coordinated Time (Greenwich mean noon) on January 1 of the year -4712 in the Julian proleptic calendar.
| wxDateTime& wxDateTime::Set | ( | wxDateTime_t | hour, |
| wxDateTime_t | minute = 0, |
||
| wxDateTime_t | second = 0, |
||
| wxDateTime_t | millisec = 0 |
||
| ) |
| wxDateTime& wxDateTime::Set | ( | wxDateTime_t | day, |
| Month | month, | ||
| int | year = Inv_Year, |
||
| wxDateTime_t | hour = 0, |
||
| wxDateTime_t | minute = 0, |
||
| wxDateTime_t | second = 0, |
||
| wxDateTime_t | millisec = 0 |
||
| ) |
Sets the date and time from the parameters.
If the function parameters are invalid, e.g. month is February and day is 30, the object is left in an invalid state, i.e. IsValid() method will return false.
If the specified time moment is invalid due to DST, i.e. it falls into the "missing" hour on the date on which the DST starts, a valid wxDateTime object is still constructed but its hour component is moved forward to ensure that it corresponds to a valid moment in the local time zone. For example, in the CET time zone the DST started on 2013-03-31T02:00:00 in 2013 and so setting the object to 2:30 at this date actually sets the hour to 3, and not 2.
|
static |
Sets the country to use by default.
This setting influences the DST calculations, date formatting and other things.
- See also
- GetCountry()
| wxDateTime& wxDateTime::SetDay | ( | unsigned short | day | ) |
Sets the day without changing other date components.
| wxDateTime& wxDateTime::SetFromDOS | ( | unsigned long | ddt | ) |
Sets the date from the date and time in DOS format.
| wxDateTime& wxDateTime::SetFromMSWSysTime | ( | const struct _SYSTEMTIME & | st | ) |
Initialize using the Windows SYSTEMTIME structure.
- Parameters
-
st Input, Windows SYSTEMTIME reference
- Since
- 2.9.0
- Remarks
- MSW only Availability: only available for the wxMSW port.
| wxDateTime& wxDateTime::SetHour | ( | unsigned short | hour | ) |
Sets the hour without changing other date components.
| wxDateTime& wxDateTime::SetMillisecond | ( | unsigned short | millisecond | ) |
Sets the millisecond without changing other date components.
| wxDateTime& wxDateTime::SetMinute | ( | unsigned short | minute | ) |
Sets the minute without changing other date components.
| wxDateTime& wxDateTime::SetMonth | ( | Month | month | ) |
Sets the month without changing other date components.
| wxDateTime& wxDateTime::SetSecond | ( | unsigned short | second | ) |
Sets the second without changing other date components.
| wxDateTime& wxDateTime::SetToCurrent | ( | ) |
Sets the date and time of to the current values.
Same as assigning the result of Now() to this object.
| wxDateTime& wxDateTime::SetToLastMonthDay | ( | Month | month = Inv_Month, |
| int | year = Inv_Year |
||
| ) |
Sets the date to the last day in the specified month (the current one by default).
- Returns
- The reference to the modified object itself.
The effect of calling this function is the same as of calling SetToWeekDay(-1, weekday, month, year).
The date will be set to the last weekday in the given month and year (the current ones by default). Always returns true.
| wxDateTime& wxDateTime::SetToNextWeekDay | ( | WeekDay | weekday | ) |
Sets the date so that it will be the first weekday following the current date.
- Returns
- The reference to the modified object itself.
| wxDateTime& wxDateTime::SetToPrevWeekDay | ( | WeekDay | weekday | ) |
Sets the date so that it will be the last weekday before the current date.
- Returns
- The reference to the modified object itself.
| bool wxDateTime::SetToWeekDay | ( | WeekDay | weekday, |
| int | n = 1, |
||
| Month | month = Inv_Month, |
||
| int | year = Inv_Year |
||
| ) |
Sets the date to the n-th weekday in the given month of the given year (the current month and year are used by default).
The parameter n may be either positive (counting from the beginning of the month) or negative (counting from the end of it).
For example, SetToWeekDay(2, wxDateTime::Wed) will set the date to the second Wednesday in the current month and SetToWeekDay(-1, wxDateTime::Sun) will set the date to the last Sunday in the current month.
- Returns
- true if the date was modified successfully, false otherwise meaning that the specified date doesn't exist.
| wxDateTime& wxDateTime::SetToWeekDayInSameWeek | ( | WeekDay | weekday, |
| WeekFlags | flags = Monday_First |
||
| ) |
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.
|
static |
Set the date to the given weekday in the week number numWeek of the given 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.
| wxDateTime& wxDateTime::SetToYearDay | ( | wxDateTime_t | yday | ) |
Sets the date to the day number 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& wxDateTime::SetYear | ( | int | year | ) |
Sets the year without changing other date components.
| wxDateTime wxDateTime::Subtract | ( | const wxTimeSpan & | diff | ) | const |
Subtracts the given time span from this object.
| wxDateTime& wxDateTime::Subtract | ( | const wxTimeSpan & | diff | ) |
Subtracts the given time span from this object.
| wxDateTime wxDateTime::Subtract | ( | const wxDateSpan & | diff | ) | const |
Subtracts the given date span from this object.
| wxDateTime& wxDateTime::Subtract | ( | const wxDateSpan & | diff | ) |
Subtracts the given date span from this object.
| wxTimeSpan wxDateTime::Subtract | ( | const wxDateTime & | dt | ) | const |
Subtracts another date from this one and returns the difference between them as a wxTimeSpan.
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static |
| wxDateTime wxDateTime::ToTimezone | ( | const TimeZone & | tz, |
| bool | noDST = false |
||
| ) | const |
Transform the date to the given time zone.
If noDST is true, no DST adjustments will be made.
Notice that, as with FromTimezone(), using wxDateTime::Local as tz doesn't really make sense and may return a different object when DST is in effect and noDST is false.
- Returns
- The date adjusted by the different between the local and the given time zones.
| wxDateTime wxDateTime::ToUTC | ( | bool | noDST = false | ) | const |
This is the same as calling ToTimezone() with the argument GMT0.
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static |
Returns the object corresponding to the current UTC time including the milliseconds.
Notice that unlike Now(), this method creates a wxDateTime object corresponding to UTC, not local, time.
- See also
- Now(), wxGetUTCTimeMillis()