+ The type @c wxDateTime_t is typedefed as <tt>unsigned short</tt> and is
+ used to contain the number of years, hours, minutes, seconds and
+ milliseconds.
+
+
+ @section datetime_constants Constants
+
+ Global constant wxDefaultDateTime and synonym for it wxInvalidDateTime are
+ defined. This constant will be different from any valid wxDateTime object.
+
+ All the following constants are defined inside wxDateTime class (i.e., to
+ refer to them you should prepend their names with "wxDateTime::").
+
+ Time zone symbolic names:
+
+ @code
+ enum TZ
+ {
+ // the time in the current time zone
+ Local,
+
+ // zones from GMT (= Greenwhich Mean Time): they're guaranteed to be
+ // consequent numbers, so writing something like `GMT0 + offset' is
+ // safe if abs(offset) <= 12
+
+ // underscore stands for minus
+ 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,
+ // Note that GMT12 and GMT_12 are not the same: there is a difference
+ // of exactly one day between them
+
+ // some symbolic names for TZ
+
+ // Europe
+ WET = GMT0, // Western Europe Time
+ WEST = GMT1, // Western Europe Summer Time
+ CET = GMT1, // Central Europe Time
+ CEST = GMT2, // Central Europe Summer Time
+ EET = GMT2, // Eastern Europe Time
+ EEST = GMT3, // Eastern Europe Summer Time
+ MSK = GMT3, // Moscow Time
+ MSD = GMT4, // Moscow Summer Time
+
+ // US and Canada
+ AST = GMT_4, // Atlantic Standard Time
+ ADT = GMT_3, // Atlantic Daylight Time
+ EST = GMT_5, // Eastern Standard Time
+ EDT = GMT_4, // Eastern Daylight Saving Time
+ CST = GMT_6, // Central Standard Time
+ CDT = GMT_5, // Central Daylight Saving Time
+ MST = GMT_7, // Mountain Standard Time
+ MDT = GMT_6, // Mountain Daylight Saving Time
+ PST = GMT_8, // Pacific Standard Time
+ PDT = GMT_7, // Pacific Daylight Saving Time
+ HST = GMT_10, // Hawaiian Standard Time
+ AKST = GMT_9, // Alaska Standard Time
+ AKDT = GMT_8, // Alaska Daylight Saving Time
+
+ // Australia
+
+ A_WST = GMT8, // Western Standard Time
+ A_CST = GMT13 + 1, // Central Standard Time (+9.5)
+ A_EST = GMT10, // Eastern Standard Time
+ A_ESST = GMT11, // Eastern Summer Time
+
+ // New Zealand
+ NZST = GMT12, // Standard Time
+ NZDT = GMT13, // Daylight Saving Time
+
+ // Universal Coordinated Time = the new and politically correct name
+ // for GMT
+ UTC = GMT0
+ };
+ @endcode
+
+ Month names: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec and
+ Inv_Month for an invalid month are the values of @c wxDateTime::Month enum.
+
+ Likewise, Sun, Mon, Tue, Wed, Thu, Fri, Sat, and Inv_WeekDay are the values
+ in @c wxDateTime::WeekDay enum.
+
+ Finally, Inv_Year is defined to be an invalid value for year parameter.
+
+ GetMonthName() and GetWeekDayName() functions use the following flags:
+
+ @code
+ enum NameFlags
+ {
+ Name_Full = 0x01, // return full name
+ Name_Abbr = 0x02 // return abbreviated name
+ };
+ @endcode
+
+ 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:
+
+ @code
+ enum Calendar
+ {
+ Gregorian, // calendar currently in use in Western countries
+ Julian // calendar in use since -45 until the 1582 (or later)
+ };
+ @endcode
+
+ 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:
+
+ @code
+ enum Country
+ {
+ 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 = Country_WesternEurope_Start,
+ France,
+ Germany,
+ UK,
+ Country_WesternEurope_End = UK,
+
+ Russia,
+
+ USA
+ };
+ @endcode
+
+ 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 behvaiour may be specified by giving one of the following
+ constants as argument to these functions:
+
+ @code
+ enum WeekFlags
+ {
+ 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
+ };
+ @endcode
+
+
+ @section datetime_static 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.
+
+ @beginWxPythonOnly
+ These methods are standalone functions named
+ "wxDateTime_<StaticMethodName>" in wxPython.
+ @endWxPythonOnly
+
+
+ @section datetime_formatting 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 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 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,
+ ParseDateTime() 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 (@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.
+
+
projects / wxWidgets.git / blobdiff