128608dc25
yday field values starts from 0 and mday starts from 1, contrary to what was actually written. Closes #18534.
2166 lines
67 KiB
Objective-C
2166 lines
67 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: datetime.h
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// Purpose: interface of wxDateTime
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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@class wxDateTime
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wxDateTime class represents an absolute moment in time.
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The type @c wxDateTime_t is typedefed as <tt>unsigned short</tt> and is
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used to contain the number of years, hours, minutes, seconds and
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milliseconds.
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Global constant ::wxDefaultDateTime and synonym for it ::wxInvalidDateTime are
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defined. This constant will be different from any valid wxDateTime object.
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@section datetime_static Static Functions
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All static functions either set or return the static variables of
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wxDateSpan (the country), return the current moment, year, month or number
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of days in it, or do some general calendar-related actions.
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Please note that although several function accept an extra Calendar
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parameter, it is currently ignored as only the Gregorian calendar is
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supported. Future versions will support other calendars.
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@section datetime_formatting Date Formatting and Parsing
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The date formatting and parsing functions convert wxDateTime objects to and
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from text. The conversions to text are mostly trivial: you can either do it
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using the default date and time representations for the current locale
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(FormatDate() and FormatTime()), using the international standard
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representation defined by ISO 8601 (FormatISODate(), FormatISOTime() and
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FormatISOCombined()) or by specifying any format at all and using Format()
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directly.
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The conversions from text are more interesting, as there are much more
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possibilities to care about. The simplest cases can be taken care of with
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ParseFormat() which can parse any date in the given (rigid) format.
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ParseRfc822Date() is another function for parsing dates in predefined
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format -- the one of RFC 822 which (still...) defines the format of email
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messages on the Internet. This format cannot be described with
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@c strptime(3)-like format strings used by Format(), hence the need for a
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separate function.
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But the most interesting functions are ParseTime(), ParseDate() and
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ParseDateTime(). They try to parse the date and time (or only one of them)
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in 'free' format, i.e. allow them to be specified in any of possible ways.
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These functions will usually be used to parse the (interactive) user input
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which is not bound to be in any predefined format. As an example,
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ParseDate() can parse the strings such as "tomorrow", "March first" and
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even "next Sunday".
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Finally notice that each of the parsing functions is available in several
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overloads: if the input string is a narrow (@c char *) string, then a
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narrow pointer is returned. If the input string is a wide string, a wide
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char pointer is returned. Finally, if the input parameter is a wxString, a
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narrow char pointer is also returned for backwards compatibility but there
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is also an additional argument of wxString::const_iterator type in which,
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if it is not @NULL, an iterator pointing to the end of the scanned string
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part is returned.
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@library{wxbase}
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@category{data}
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@stdobjects
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- ::wxDefaultDateTime
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@see @ref overview_datetime, wxTimeSpan, wxDateSpan, wxCalendarCtrl
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*/
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class wxDateTime
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{
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public:
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/**
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A small unsigned integer type for storing things like minutes,
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seconds &c. It should be at least short (i.e. not char) to contain
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the number of milliseconds - it may also be 'int' because there is
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no size penalty associated with it in our code, we don't store any
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data in this format.
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*/
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typedef unsigned short wxDateTime_t;
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/**
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Time zone symbolic names.
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*/
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enum TZ
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{
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/// the time in the current time zone
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Local,
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//@{
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/// zones from GMT (= Greenwich Mean Time): they're guaranteed to be
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/// consequent numbers, so writing something like `GMT0 + offset' is
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/// safe if abs(offset) <= 12
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// underscore stands for minus
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GMT_12, GMT_11, GMT_10, GMT_9, GMT_8, GMT_7,
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GMT_6, GMT_5, GMT_4, GMT_3, GMT_2, GMT_1,
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GMT0,
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GMT1, GMT2, GMT3, GMT4, GMT5, GMT6,
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GMT7, GMT8, GMT9, GMT10, GMT11, GMT12, GMT13,
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// Note that GMT12 and GMT_12 are not the same: there is a difference
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// of exactly one day between them
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//@}
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// some symbolic names for TZ
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// Europe
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WET = GMT0, //!< Western Europe Time
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WEST = GMT1, //!< Western Europe Summer Time
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CET = GMT1, //!< Central Europe Time
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CEST = GMT2, //!< Central Europe Summer Time
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EET = GMT2, //!< Eastern Europe Time
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EEST = GMT3, //!< Eastern Europe Summer Time
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MSK = GMT3, //!< Moscow Time
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MSD = GMT4, //!< Moscow Summer Time
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// US and Canada
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AST = GMT_4, //!< Atlantic Standard Time
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ADT = GMT_3, //!< Atlantic Daylight Time
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EST = GMT_5, //!< Eastern Standard Time
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EDT = GMT_4, //!< Eastern Daylight Saving Time
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CST = GMT_6, //!< Central Standard Time
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CDT = GMT_5, //!< Central Daylight Saving Time
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MST = GMT_7, //!< Mountain Standard Time
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MDT = GMT_6, //!< Mountain Daylight Saving Time
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PST = GMT_8, //!< Pacific Standard Time
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PDT = GMT_7, //!< Pacific Daylight Saving Time
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HST = GMT_10, //!< Hawaiian Standard Time
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AKST = GMT_9, //!< Alaska Standard Time
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AKDT = GMT_8, //!< Alaska Daylight Saving Time
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// Australia
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A_WST = GMT8, //!< Western Standard Time
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A_CST = GMT13 + 1, //!< Central Standard Time (+9.5)
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A_EST = GMT10, //!< Eastern Standard Time
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A_ESST = GMT11, //!< Eastern Summer Time
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// New Zealand
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NZST = GMT12, //!< Standard Time
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NZDT = GMT13, //!< Daylight Saving Time
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/// Universal Coordinated Time = the new and politically correct name
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/// for GMT.
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UTC = GMT0
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};
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/**
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Several functions accept an extra parameter specifying the calendar to use
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(although most of them only support now the Gregorian calendar). This
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parameters is one of the following values.
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*/
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enum Calendar
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{
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Gregorian, ///< calendar currently in use in Western countries
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Julian ///< calendar in use since -45 until the 1582 (or later)
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};
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/**
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Date calculations often depend on the country and wxDateTime allows setting
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the country whose conventions should be used using SetCountry(). It takes
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one of the following values as parameter.
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*/
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enum Country
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{
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Country_Unknown, ///< no special information for this country
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Country_Default, ///< set the default country with SetCountry() method
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///< or use the default country with any other
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Country_WesternEurope_Start,
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Country_EEC = Country_WesternEurope_Start,
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France,
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Germany,
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UK,
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Country_WesternEurope_End = UK,
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Russia,
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USA
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};
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/// symbolic names for the months
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enum Month
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{
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Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec,
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/// Invalid month value.
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Inv_Month
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};
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/// symbolic names for the weekdays
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enum WeekDay
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{
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Sun, Mon, Tue, Wed, Thu, Fri, Sat,
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/// Invalid week day value.
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Inv_WeekDay
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};
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/// invalid value for the year
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enum Year
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{
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Inv_Year = SHRT_MIN // should hold in wxDateTime_t
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};
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/**
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Flags to be used with GetMonthName() and GetWeekDayName() functions.
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*/
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enum NameFlags
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{
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Name_Full = 0x01, ///< return full name
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Name_Abbr = 0x02 ///< return abbreviated name
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};
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/**
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Different parts of the world use different conventions for the week start.
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In some countries, the week starts on Sunday, while in others -- on Monday.
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The ISO standard doesn't address this issue, so we support both conventions
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in the functions whose result depends on it (GetWeekOfYear() and
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GetWeekOfMonth()).
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The desired behaviour may be specified by giving one of the following
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constants as argument to these functions.
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*/
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enum WeekFlags
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{
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Default_First, ///< Sunday_First for US, Monday_First for the rest
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Monday_First, ///< week starts with a Monday
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Sunday_First ///< week starts with a Sunday
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};
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/**
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Class representing a time zone.
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The representation is simply the offset, in seconds, from UTC.
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*/
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class WXDLLIMPEXP_BASE TimeZone
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{
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public:
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/// Constructor for a named time zone.
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TimeZone(TZ tz);
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/// Constructor for the given offset in seconds.
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TimeZone(long offset = 0);
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/// Create a time zone with the given offset in seconds.
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static TimeZone Make(long offset);
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/**
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Return true if this is the local time zone.
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This method can be useful for distinguishing between UTC time zone
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and local time zone in Great Britain, which use the same offset as
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UTC (i.e. 0), but do use DST.
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@since 3.1.1
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*/
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bool IsLocal() const;
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/// Return the offset of this time zone from UTC, in seconds.
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long GetOffset() const;
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};
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/**
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Contains broken down date-time representation.
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This struct is analogous to standard C <code>struct tm</code> and uses
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the same, not always immediately obvious, conventions for its members:
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notably its mon and yday fields count from 0 while mday counts from 1.
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*/
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struct Tm
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{
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wxDateTime_t msec, ///< Number of milliseconds.
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sec, ///< Seconds in 0..59 (60 with leap seconds) range.
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min, ///< Minutes in 0..59 range.
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hour, ///< Hours since midnight in 0..23 range.
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mday, ///< Day of the month in 1..31 range.
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yday; ///< Day of the year in 0..365 range.
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Month mon; ///< Month, as an enumerated constant.
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int year; ///< Year.
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/**
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Check if the given date/time is valid (in Gregorian calendar).
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Return @false if the components don't correspond to a correct date.
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*/
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bool IsValid() const;
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/**
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Return the week day corresponding to this date.
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Unlike the other fields, the week day is not always available and
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so must be accessed using this method as it is computed on demand
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when it is called.
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*/
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WeekDay GetWeekDay();
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};
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/**
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@name Constructors, Assignment Operators and Setters
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Constructors and various Set() methods are collected here. If you
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construct a date object from separate values for day, month and year,
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you should use IsValid() method to check that the values were correct
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as constructors cannot return an error code.
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*/
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//@{
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/**
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Default constructor. Use one of the Set() functions to initialize the
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object later.
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*/
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wxDateTime();
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/**
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Copy constructor.
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*/
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wxDateTime(const wxDateTime& date);
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/**
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Same as Set().
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*/
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wxDateTime(time_t timet);
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/**
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Same as Set().
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*/
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wxDateTime(const struct tm& tm);
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/**
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Same as Set().
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*/
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wxDateTime(double jdn);
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/**
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Same as Set().
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*/
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wxDateTime(wxDateTime_t hour, wxDateTime_t minute = 0,
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wxDateTime_t second = 0, wxDateTime_t millisec = 0);
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/**
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Same as Set().
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*/
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wxDateTime(wxDateTime_t day, Month month,
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int year = Inv_Year, wxDateTime_t hour = 0,
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wxDateTime_t minute = 0, wxDateTime_t second = 0,
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wxDateTime_t millisec = 0);
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/**
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Same as SetFromMSWSysTime.
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@param st
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Input, Windows SYSTEMTIME reference
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@since 2.9.0
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@remarks MSW only
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@onlyfor{wxmsw}
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*/
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wxDateTime(const struct _SYSTEMTIME& st);
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/**
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Reset time to midnight (00:00:00) without changing the date.
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*/
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wxDateTime& ResetTime();
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/**
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Constructs the object from @a timet value holding the number of seconds
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since Jan 1, 1970 UTC.
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If @a timet is invalid, i.e. @code (time_t)-1 @endcode, wxDateTime
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becomes invalid too, i.e. its IsValid() will return @false.
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*/
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wxDateTime& Set(time_t timet);
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/**
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Sets the date and time from the broken down representation in the
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standard @a tm structure.
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*/
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wxDateTime& Set(const struct tm& tm);
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/**
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Sets the date and time from the broken down representation in the
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@a wxDateTime::Tm structure.
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*/
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wxDateTime& Set(const Tm& tm);
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/**
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Sets the date from the so-called Julian Day Number.
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By definition, the Julian Day Number, usually abbreviated as JDN, of a
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particular instant is the fractional number of days since 12 hours
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Universal Coordinated Time (Greenwich mean noon) on January 1 of the
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year -4712 in the Julian proleptic calendar.
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*/
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wxDateTime& Set(double jdn);
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/**
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Sets the date to be equal to Today() and the time from supplied
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parameters.
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See the full Set() overload for the remarks about DST.
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*/
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wxDateTime& Set(wxDateTime_t hour, wxDateTime_t minute = 0,
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wxDateTime_t second = 0, wxDateTime_t millisec = 0);
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/**
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Sets the date and time from the parameters.
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If the function parameters are invalid, e.g. @a month is February and
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@a day is 30, the object is left in an invalid state, i.e. IsValid()
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method will return @false.
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If the specified time moment is invalid due to DST, i.e. it falls into
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the "missing" hour on the date on which the DST starts, a valid
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wxDateTime object is still constructed but its hour component is moved
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forward to ensure that it corresponds to a valid moment in the local
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time zone. For example, in the CET time zone the DST started on
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2013-03-31T02:00:00 in 2013 and so setting the object to 2:30 at this
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date actually sets the hour to 3, and not 2.
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*/
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wxDateTime& Set(wxDateTime_t day, Month month,
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int year = Inv_Year, wxDateTime_t hour = 0,
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wxDateTime_t minute = 0, wxDateTime_t second = 0,
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wxDateTime_t millisec = 0);
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/**
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Sets the day without changing other date components.
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*/
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wxDateTime& SetDay(unsigned short day);
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/**
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Sets the date from the date and time in DOS format.
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*/
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wxDateTime& SetFromDOS(unsigned long ddt);
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/**
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Sets the hour without changing other date components.
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*/
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wxDateTime& SetHour(unsigned short hour);
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/**
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Sets the millisecond without changing other date components.
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*/
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wxDateTime& SetMillisecond(unsigned short millisecond);
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/**
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Sets the minute without changing other date components.
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*/
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wxDateTime& SetMinute(unsigned short minute);
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/**
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Sets the month without changing other date components.
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*/
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wxDateTime& SetMonth(Month month);
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/**
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Sets the second without changing other date components.
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*/
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wxDateTime& SetSecond(unsigned short second);
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/**
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Sets the date and time of to the current values. Same as assigning the
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result of Now() to this object.
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*/
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wxDateTime& SetToCurrent();
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/**
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Sets the year without changing other date components.
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*/
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wxDateTime& SetYear(int year);
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/**
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Same as Set().
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*/
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wxDateTime& operator=(time_t timet);
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/**
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Same as Set().
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*/
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wxDateTime& operator=(const struct tm& tm);
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//@}
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/**
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@name Accessors
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Here are the trivial accessors. Other functions, which might have to
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perform some more complicated calculations to find the answer are under
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the "Date Arithmetics" section.
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*/
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//@{
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/**
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Returns the date and time in DOS format.
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*/
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unsigned long GetAsDOS() const;
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/**
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Initialize using the Windows SYSTEMTIME structure.
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@param st
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Input, Windows SYSTEMTIME reference
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@since 2.9.0
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@remarks MSW only
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@onlyfor{wxmsw}
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*/
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wxDateTime& SetFromMSWSysTime(const struct _SYSTEMTIME& st);
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|
/**
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Returns the date and time in the Windows SYSTEMTIME format.
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@param st
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Output, pointer to Windows SYSTEMTIME
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@since 2.9.0
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@remarks MSW only
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@onlyfor{wxmsw}
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*/
|
|
void GetAsMSWSysTime(struct _SYSTEMTIME* st) const;
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|
|
/**
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|
Returns the century of this date.
|
|
*/
|
|
int GetCentury(const TimeZone& tz = Local) const;
|
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|
|
/**
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|
Returns the object having the same date component as this one but time
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of 00:00:00.
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|
@since 2.8.2
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|
@see ResetTime()
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*/
|
|
wxDateTime GetDateOnly() const;
|
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|
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/**
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Returns the day in the given timezone (local one by default).
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*/
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unsigned short GetDay(const TimeZone& tz = Local) const;
|
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|
|
/**
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|
Returns the day of the year (in 1-366 range) in the given timezone
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(local one by default).
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*/
|
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unsigned short GetDayOfYear(const TimeZone& tz = Local) const;
|
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|
|
/**
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|
Returns the hour in the given timezone (local one by default).
|
|
*/
|
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unsigned short GetHour(const TimeZone& tz = Local) const;
|
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|
|
/**
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|
Returns the milliseconds in the given timezone (local one by default).
|
|
*/
|
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unsigned short GetMillisecond(const TimeZone& tz = Local) const;
|
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|
|
/**
|
|
Returns the minute in the given timezone (local one by default).
|
|
*/
|
|
unsigned short GetMinute(const TimeZone& tz = Local) const;
|
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|
|
/**
|
|
Returns the month in the given timezone (local one by default).
|
|
*/
|
|
Month GetMonth(const TimeZone& tz = Local) const;
|
|
|
|
/**
|
|
Returns the seconds in the given timezone (local one by default).
|
|
*/
|
|
unsigned short GetSecond(const TimeZone& tz = Local) const;
|
|
|
|
/**
|
|
Returns the number of seconds since Jan 1, 1970 UTC.
|
|
|
|
This function is provided solely for interoperability with the standard
|
|
C library and other libraries using @c time_t values. If you just need
|
|
to get the value represented by this object as a number, use GetValue()
|
|
instead, which doesn't lose precision and covers the entire supported
|
|
range of dates, unlike this one which is limited to the range of
|
|
positive 32 bit values, i.e. from Jan 1, 1970 to around Jan 19, 2038
|
|
and returns @c -1 for the dates outside of it.
|
|
|
|
Additionally, this method must be called on an initialized date object
|
|
and an assertion failure occurs if it is called on an object for which
|
|
IsValid() is false.
|
|
*/
|
|
time_t GetTicks() const;
|
|
|
|
/**
|
|
Returns the number of milliseconds since Jan 1, 1970 UTC.
|
|
|
|
Directly returns the internal representation of wxDateTime object as
|
|
the number of milliseconds (positive or negative) since the Unix/C
|
|
epoch.
|
|
*/
|
|
wxLongLong GetValue() const;
|
|
|
|
/**
|
|
Returns broken down representation of the date and time.
|
|
*/
|
|
Tm GetTm(const TimeZone& tz = Local) const;
|
|
|
|
/**
|
|
Returns the week day in the given timezone (local one by default).
|
|
*/
|
|
WeekDay GetWeekDay(const TimeZone& tz = Local) const;
|
|
|
|
/**
|
|
Returns the year to which the week containing this date belongs.
|
|
|
|
The value returned by this function is the same as the year, except,
|
|
possibly, for a few days at the very beginning and very end of the year
|
|
if they belong to a week which is mostly (i.e. at least 4 days) is in
|
|
another year in which case that other (previous or next) year is
|
|
returned.
|
|
|
|
For example, January 1 in 2015 belongs to the first year of 2015, hence
|
|
GetWeekOfYear() for it returns 1 and this function returns 2015.
|
|
However January 1 in 2016 belongs to the last week of 2015 according to
|
|
ISO 8601 standard rules and so GetWeekOfYear() returns 53 and this
|
|
function returns 2015, although GetYear() returns 2016.
|
|
|
|
@since 3.1.0
|
|
*/
|
|
int GetWeekBasedYear(const TimeZone& tz) 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 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 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.
|
|
|
|
@see GetWeekBasedYear()
|
|
*/
|
|
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 @true if the object represents a valid time moment.
|
|
*/
|
|
bool IsValid() const;
|
|
|
|
/**
|
|
Returns @true is this day is not a holiday in the given country.
|
|
*/
|
|
bool IsWorkDay(Country country = Country_Default) const;
|
|
|
|
//@}
|
|
|
|
|
|
|
|
/**
|
|
@name Date Comparison
|
|
|
|
There are several functions to allow date comparison. To supplement
|
|
them, the usual comparison operators taking wxDateTime are defined as
|
|
well.
|
|
|
|
Notice that an invalid wxDateTime object can only be compared for
|
|
exact equality, i.e. using @c operator==(), @c operator!=() or
|
|
IsEqualTo(), but comparisons involving an invalid wxDateTime object
|
|
using any other operators or IsEarlierThan() or IsLaterThan() functions
|
|
would result in an assert because their result is not well-defined.
|
|
*/
|
|
//@{
|
|
|
|
/**
|
|
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 this date is later than the given one.
|
|
*/
|
|
bool IsLaterThan(const wxDateTime& datetime) const;
|
|
|
|
/**
|
|
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 given dates.
|
|
|
|
@see IsBetween()
|
|
*/
|
|
bool IsStrictlyBetween(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 IsStrictlyBetween()
|
|
*/
|
|
bool IsBetween(const wxDateTime& t1, const wxDateTime& t2) const;
|
|
|
|
//@}
|
|
|
|
|
|
|
|
/**
|
|
@name Date Arithmetics
|
|
|
|
These functions carry out
|
|
@ref overview_datetime_arithmetics "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.
|
|
*/
|
|
//@{
|
|
|
|
/**
|
|
Adds the given date span to this object.
|
|
*/
|
|
wxDateTime Add(const wxDateSpan& diff) const;
|
|
/**
|
|
Adds the given date span to this object.
|
|
*/
|
|
wxDateTime& Add(const wxDateSpan& diff);
|
|
/**
|
|
Adds the given time span to this object.
|
|
*/
|
|
wxDateTime Add(const wxTimeSpan& diff) const;
|
|
/**
|
|
Adds the given time span to this object.
|
|
*/
|
|
wxDateTime& Add(const wxTimeSpan& diff);
|
|
|
|
/**
|
|
Subtracts the given time span from this object.
|
|
*/
|
|
wxDateTime Subtract(const wxTimeSpan& diff) const;
|
|
/**
|
|
Subtracts the given time span from this object.
|
|
*/
|
|
wxDateTime& Subtract(const wxTimeSpan& diff);
|
|
/**
|
|
Subtracts the given date span from this object.
|
|
*/
|
|
wxDateTime Subtract(const wxDateSpan& diff) const;
|
|
/**
|
|
Subtracts the given date span from this object.
|
|
*/
|
|
wxDateTime& Subtract(const wxDateSpan& diff);
|
|
/**
|
|
Subtracts another date from this one and returns the difference between
|
|
them as a wxTimeSpan.
|
|
*/
|
|
wxTimeSpan Subtract(const wxDateTime& dt) const;
|
|
/**
|
|
Returns the difference between this object and @a dt as a wxDateSpan.
|
|
|
|
This method allows finding the number of entire years, months, weeks and
|
|
days between @a dt and this date.
|
|
|
|
@since 2.9.5
|
|
*/
|
|
wxDateSpan DiffAsDateSpan(const wxDateTime& dt) const;
|
|
|
|
/**
|
|
Adds the given date span to this object.
|
|
*/
|
|
wxDateTime& operator+=(const wxDateSpan& diff);
|
|
/**
|
|
Adds the given date span to this object.
|
|
*/
|
|
wxDateTime operator+(const wxDateSpan& ds) const;
|
|
/**
|
|
Subtracts the given date span from this object.
|
|
*/
|
|
wxDateTime& operator-=(const wxDateSpan& diff);
|
|
/**
|
|
Subtracts the given date span from this object.
|
|
*/
|
|
wxDateTime operator-(const wxDateSpan& ds) const;
|
|
/**
|
|
Adds the given time span to this object.
|
|
*/
|
|
wxDateTime& operator+=(const wxTimeSpan& diff);
|
|
/**
|
|
Adds the given time span to this object.
|
|
*/
|
|
wxDateTime operator+(const wxTimeSpan& ts) const;
|
|
/**
|
|
Subtracts the given time span from this object.
|
|
*/
|
|
wxDateTime& operator-=(const wxTimeSpan& diff);
|
|
/**
|
|
Subtracts the given time span from this object.
|
|
*/
|
|
wxDateTime operator-(const wxTimeSpan& ts) const;
|
|
/**
|
|
Subtracts another date from this one and returns the difference between
|
|
them as a wxTimeSpan.
|
|
*/
|
|
wxTimeSpan operator-(const wxDateTime& dt2) const;
|
|
|
|
//@}
|
|
|
|
|
|
|
|
/**
|
|
@name Date Formatting and Parsing
|
|
|
|
See @ref datetime_formatting
|
|
*/
|
|
//@{
|
|
|
|
/**
|
|
This function does the same as the standard ANSI C @c strftime(3)
|
|
function (http://www.cplusplus.com/reference/clibrary/ctime/strftime.html).
|
|
Please see its description for the meaning of @a format parameter.
|
|
|
|
Notice that POSIX @c "%g", @c "%G", @c "%V" and @c "%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 @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 wxString& 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
|
|
@c "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 separator 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
|
|
@c "YYYY-MM-DD".
|
|
*/
|
|
wxString FormatISODate() const;
|
|
|
|
/**
|
|
This function returns the time representation in the ISO 8601 format
|
|
@c "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;
|
|
|
|
/**
|
|
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 Format()
|
|
*/
|
|
bool ParseDate(const wxString& date, wxString::const_iterator *end);
|
|
|
|
/**
|
|
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 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 ParseDateTime(const wxString& datetime, wxString::const_iterator *end);
|
|
|
|
/**
|
|
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 day of the month), the month and the year are taken from
|
|
@a dateDef. If it is not specified, Today() is used as the default
|
|
date.
|
|
|
|
Example of using this function:
|
|
@code
|
|
wxDateTime dt;
|
|
wxString str = "...";
|
|
wxString::const_iterator end;
|
|
if ( !dt.ParseFormat(str, "%Y-%m-%d", &end) )
|
|
... parsing failed ...
|
|
else if ( end == str.end() )
|
|
... entire string parsed ...
|
|
else
|
|
... wxString(end, str.end()) left over ...
|
|
@endcode
|
|
|
|
@param date
|
|
The string to be parsed.
|
|
@param format
|
|
strptime()-like format string.
|
|
@param dateDef
|
|
Used to fill in the date components not specified in the @a date
|
|
string.
|
|
@param 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 @c date.end(). Notice that this argument
|
|
must be non-@NULL.
|
|
@return
|
|
@true if at least part of the string was parsed successfully,
|
|
@false otherwise.
|
|
|
|
@see Format()
|
|
*/
|
|
bool ParseFormat(const wxString& date,
|
|
const wxString& format,
|
|
const wxDateTime& dateDef,
|
|
wxString::const_iterator *end);
|
|
|
|
/**
|
|
@overload
|
|
*/
|
|
bool ParseFormat(const wxString& date,
|
|
const wxString& format,
|
|
wxString::const_iterator *end);
|
|
|
|
/**
|
|
@overload
|
|
*/
|
|
bool ParseFormat(const wxString& date, wxString::const_iterator *end);
|
|
|
|
/**
|
|
This function parses the string containing the date and time in ISO
|
|
8601 combined format @c "YYYY-MM-DDTHH:MM:SS". The separator between
|
|
the date and time parts must be equal to @a sep for the function to
|
|
succeed.
|
|
|
|
@return @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 @c "YYYY-MM-DD".
|
|
|
|
@return @true if the entire string was parsed successfully, @false
|
|
otherwise.
|
|
*/
|
|
bool ParseISODate(const wxString& date);
|
|
|
|
/**
|
|
This function parses the time in ISO 8601 format @c "HH:MM:SS".
|
|
|
|
@return @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.
|
|
|
|
See ParseFormat() for the description of function parameters and return
|
|
value.
|
|
*/
|
|
bool ParseRfc822Date(const wxString& date, 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.
|
|
*/
|
|
bool ParseTime(const wxString& time, wxString::const_iterator *end);
|
|
|
|
//@}
|
|
|
|
|
|
|
|
/**
|
|
@name 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.
|
|
*/
|
|
//@{
|
|
|
|
/**
|
|
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);
|
|
|
|
/**
|
|
Returns the copy of this object to which SetToNextWeekDay() was
|
|
applied.
|
|
*/
|
|
wxDateTime GetNextWeekDay(WeekDay weekday) const;
|
|
|
|
/**
|
|
Returns the copy of this object to which SetToPrevWeekDay() was
|
|
applied.
|
|
*/
|
|
wxDateTime GetPrevWeekDay(WeekDay weekday) const;
|
|
|
|
/**
|
|
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;
|
|
|
|
/**
|
|
Returns the copy of this object to which SetToYearDay() was applied.
|
|
*/
|
|
wxDateTime GetYearDay(wxDateTime_t yday) const;
|
|
|
|
/**
|
|
Sets the date to the last day in the specified month (the current one
|
|
by default).
|
|
|
|
@return 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.
|
|
|
|
@return 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.
|
|
|
|
@return 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
|
|
@a n may be either positive (counting from the beginning of the month)
|
|
or negative (counting from the end of it).
|
|
|
|
For example, SetToWeekDay(wxDateTime::Wed, 2) will set the date to the
|
|
second Wednesday in the current month and
|
|
SetToWeekDay(wxDateTime::Sun, -1) will set the date to the last Sunday
|
|
in the current month.
|
|
|
|
Note that leaving the month or year parameters as their default values
|
|
will result in the current month or year being substituted, overwriting
|
|
any previous values in the wxDateTime object.
|
|
|
|
@return @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.
|
|
|
|
@return The reference to the modified object itself.
|
|
*/
|
|
wxDateTime& SetToWeekDayInSameWeek(WeekDay weekday,
|
|
WeekFlags flags = Monday_First);
|
|
|
|
/**
|
|
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.
|
|
|
|
@return The reference to the modified object itself.
|
|
*/
|
|
wxDateTime& SetToYearDay(wxDateTime_t yday);
|
|
|
|
//@}
|
|
|
|
|
|
|
|
/**
|
|
@name 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)
|
|
*/
|
|
//@{
|
|
|
|
/**
|
|
Synonym for GetJulianDayNumber().
|
|
*/
|
|
double GetJDN() const;
|
|
|
|
/**
|
|
Returns the JDN corresponding to this date. Beware of rounding errors!
|
|
|
|
@see GetModifiedJulianDayNumber()
|
|
*/
|
|
double GetJulianDayNumber() const;
|
|
|
|
/**
|
|
Synonym for GetModifiedJulianDayNumber().
|
|
*/
|
|
double GetMJD() const;
|
|
|
|
/**
|
|
Returns the @e "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.
|
|
*/
|
|
double GetModifiedJulianDayNumber() 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;
|
|
|
|
//@}
|
|
|
|
|
|
|
|
/**
|
|
@name Time Zone and DST Support
|
|
|
|
Please see the @ref overview_datetime_timezones "time zone overview"
|
|
for more information about time zones. Normally, these functions should
|
|
be rarely used.
|
|
|
|
Note that all functions in this section always use the current offset
|
|
for the specified time zone and don't take into account its possibly
|
|
different historical value at the given date.
|
|
|
|
Related functions in other groups: GetBeginDST(), GetEndDST()
|
|
*/
|
|
//@{
|
|
|
|
/**
|
|
Transform the date from the given time zone to the local one.
|
|
|
|
If @a noDST is @true, no DST adjustments will be made.
|
|
|
|
If @a tz parameter is wxDateTime::Local, no adjustment is performed.
|
|
|
|
@return The date adjusted by the different between the given and the
|
|
local time zones.
|
|
*/
|
|
wxDateTime FromTimezone(const TimeZone& tz, bool noDST = false) const;
|
|
|
|
/**
|
|
Returns @true if the DST is applied for this date in the given country.
|
|
|
|
@see GetBeginDST(), GetEndDST()
|
|
*/
|
|
int IsDST(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);
|
|
|
|
/**
|
|
Transform the date to the given time zone.
|
|
|
|
If @a noDST is @true, no DST adjustments will be made.
|
|
|
|
If @a tz parameter is wxDateTime::Local, no adjustment is performed.
|
|
|
|
@return The date adjusted by the different between the local and the
|
|
given time zones.
|
|
*/
|
|
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;
|
|
|
|
//@}
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
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:
|
|
|
|
@code
|
|
wxDateTime dt(...);
|
|
int y = dt.GetYear();
|
|
printf("The year is %d%s", wxDateTime::ConvertYearToBC(y), y > 0 ? "AD" : "BC");
|
|
@endcode
|
|
*/
|
|
static int ConvertYearToBC(int year);
|
|
|
|
/**
|
|
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);
|
|
|
|
/**
|
|
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 @ref overview_datetime_dst "DST overview".
|
|
|
|
@see GetEndDST()
|
|
*/
|
|
static wxDateTime GetBeginDST(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).
|
|
|
|
@see GetBeginDST()
|
|
*/
|
|
static wxDateTime GetEndDST(int year = Inv_Year,
|
|
Country country = Country_Default);
|
|
|
|
/**
|
|
Get the current century, i.e.\ first two digits of the year, in given
|
|
calendar (only Gregorian is currently supported).
|
|
*/
|
|
static int GetCentury(int year);
|
|
|
|
/**
|
|
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);
|
|
|
|
/**
|
|
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.
|
|
|
|
@param month
|
|
One of wxDateTime::Jan, ..., wxDateTime::Dec values.
|
|
@param flags
|
|
Either Name_Full (default) or Name_Abbr.
|
|
|
|
@see GetEnglishWeekDayName()
|
|
|
|
@since 2.9.0
|
|
*/
|
|
static wxString GetEnglishMonthName(Month month,
|
|
NameFlags flags = Name_Full);
|
|
|
|
/**
|
|
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.
|
|
|
|
@param weekday
|
|
One of wxDateTime::Sun, ..., wxDateTime::Sat values.
|
|
@param flags
|
|
Either Name_Full (default) or Name_Abbr.
|
|
|
|
@see GetEnglishMonthName()
|
|
|
|
@since 2.9.0
|
|
*/
|
|
static wxString GetEnglishWeekDayName(WeekDay weekday,
|
|
NameFlags flags = Name_Full);
|
|
|
|
/**
|
|
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.
|
|
|
|
@param month
|
|
One of wxDateTime::Jan, ..., wxDateTime::Dec values.
|
|
@param flags
|
|
Either Name_Full (default) or Name_Abbr.
|
|
|
|
@see GetWeekDayName()
|
|
*/
|
|
static wxString GetMonthName(Month month, NameFlags flags = Name_Full);
|
|
|
|
/**
|
|
Returns the number of days in the given year. The only supported value
|
|
for @a cal currently is @c Gregorian.
|
|
*/
|
|
static wxDateTime_t GetNumberOfDays(int year, Calendar cal = Gregorian);
|
|
|
|
/**
|
|
Returns the number of days in the given month of the given year. The
|
|
only supported value for @a cal currently is @c Gregorian.
|
|
*/
|
|
static wxDateTime_t GetNumberOfDays(Month month, int year = Inv_Year,
|
|
Calendar cal = Gregorian);
|
|
|
|
/**
|
|
Returns the current time.
|
|
*/
|
|
static time_t GetTimeNow();
|
|
|
|
/**
|
|
Returns the current time broken down using the buffer whose address is
|
|
passed to the function with @a tm to store the result.
|
|
*/
|
|
static tm* GetTmNow(struct tm *tm);
|
|
|
|
/**
|
|
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.
|
|
*/
|
|
static tm* GetTmNow();
|
|
|
|
/**
|
|
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.
|
|
|
|
@param weekday
|
|
One of wxDateTime::Sun, ..., wxDateTime::Sat values.
|
|
@param flags
|
|
Either Name_Full (default) or Name_Abbr.
|
|
|
|
@see GetMonthName()
|
|
*/
|
|
static wxString GetWeekDayName(WeekDay weekday,
|
|
NameFlags flags = Name_Full);
|
|
|
|
/**
|
|
Returns @true if DST was used in the given year (the current one by
|
|
default) in the given country.
|
|
*/
|
|
static bool IsDSTApplicable(int year = Inv_Year,
|
|
Country country = Country_Default);
|
|
|
|
/**
|
|
Acquires the first weekday of a week based on locale and/or OS settings.
|
|
If the information was not available, returns @c Sun.
|
|
@param firstDay
|
|
The address of a WeekDay variable to which the first weekday will be
|
|
assigned to.
|
|
@return If the first day could not be determined, returns false,
|
|
and @a firstDay is set to a fallback value.
|
|
@since 3.1.1
|
|
*/
|
|
static bool GetFirstWeekDay(WeekDay *firstDay);
|
|
|
|
/**
|
|
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);
|
|
|
|
/**
|
|
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 the object corresponding to the current time in local time zone.
|
|
|
|
Example:
|
|
|
|
@code
|
|
wxDateTime now = wxDateTime::Now();
|
|
printf("Current time in Paris:\t%s\n", now.Format("%c", wxDateTime::CET).c_str());
|
|
@endcode
|
|
|
|
@note This function is accurate up to seconds. UNow() can be used if
|
|
better precision is required.
|
|
|
|
@see Today()
|
|
*/
|
|
static wxDateTime Now();
|
|
|
|
/**
|
|
Sets the country to use by default. This setting influences the DST
|
|
calculations, date formatting and other things.
|
|
|
|
@see GetCountry()
|
|
*/
|
|
static void SetCountry(Country country);
|
|
|
|
/**
|
|
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);
|
|
|
|
/**
|
|
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.
|
|
|
|
Like Now(), this method creates the wxDateTime object corresponding to
|
|
the current moment in local time.
|
|
|
|
@see Now(), wxGetUTCTimeMillis()
|
|
*/
|
|
static wxDateTime UNow();
|
|
};
|
|
|
|
/**
|
|
Global instance of an empty wxDateTime object.
|
|
|
|
@todo Would it be better to rename this wxNullDateTime so it's consistent
|
|
with the rest of the "empty/invalid/null" global objects?
|
|
*/
|
|
const wxDateTime wxDefaultDateTime;
|
|
|
|
/*
|
|
wxInvalidDateTime is an alias for wxDefaultDateTime.
|
|
*/
|
|
#define wxInvalidDateTime wxDefaultDateTime
|
|
|
|
|
|
/**
|
|
@class wxDateTimeWorkDays
|
|
|
|
@todo Write wxDateTimeWorkDays documentation.
|
|
|
|
@library{wxbase}
|
|
@category{data}
|
|
*/
|
|
class wxDateTimeWorkDays
|
|
{
|
|
public:
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
@class wxDateSpan
|
|
|
|
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
|
|
with wxDateTime or wxTimeSpan, but the type of result is different for each
|
|
case.
|
|
|
|
@warning If you specify both weeks and days, the total number of days added
|
|
will be 7*weeks + days! See also GetTotalDays().
|
|
|
|
Equality operators are defined for wxDateSpans. Two wxDateSpans 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
|
|
Feb 1st. 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_datetime, 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.
|
|
|
|
@return A new wxDateSpan object with the result.
|
|
*/
|
|
wxDateSpan Add(const wxDateSpan& other) const;
|
|
/**
|
|
Adds the given wxDateSpan to this wxDateSpan and returns a reference
|
|
to itself.
|
|
*/
|
|
wxDateSpan& Add(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 (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 months in this date span, counting both
|
|
years and months.
|
|
|
|
@see GetYears(), GetMonths()
|
|
|
|
@since 2.9.5
|
|
*/
|
|
int GetTotalMonths() const;
|
|
|
|
/**
|
|
Returns the combined number of days in this date span, counting both
|
|
weeks and days. This doesn't take months or years into 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 @a factor. The
|
|
product is computed by multiplying each of the components by the
|
|
@a factor.
|
|
|
|
@return A new wxDateSpan object with the result.
|
|
*/
|
|
wxDateSpan Multiply(int factor) const;
|
|
/**
|
|
Multiplies this date span by the specified @a factor. The product is
|
|
computed by multiplying each of the components by the @a factor.
|
|
|
|
@return A reference to this wxDateSpan object modified in place.
|
|
*/
|
|
wxDateSpan& Multiply(int factor);
|
|
|
|
/**
|
|
Changes the sign of this date span.
|
|
|
|
@see Negate()
|
|
*/
|
|
wxDateSpan& Neg();
|
|
|
|
/**
|
|
Returns a 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.
|
|
|
|
@return A new wxDateSpan object with the result.
|
|
*/
|
|
wxDateSpan Subtract(const wxDateSpan& other) const;
|
|
/**
|
|
Subtracts the given wxDateSpan to this wxDateSpan and returns a
|
|
reference to itself.
|
|
*/
|
|
wxDateSpan& Subtract(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);
|
|
|
|
/**
|
|
Adds the given wxDateSpan to this wxDateSpan and returns the result.
|
|
*/
|
|
wxDateSpan& operator+=(const wxDateSpan& other);
|
|
|
|
/**
|
|
Subtracts the given wxDateSpan to this wxDateSpan and returns the
|
|
result.
|
|
*/
|
|
wxDateSpan& operator-=(const wxDateSpan& other);
|
|
|
|
/**
|
|
Changes the sign of this date span.
|
|
|
|
@see Negate()
|
|
*/
|
|
wxDateSpan& operator-();
|
|
|
|
/**
|
|
Multiplies this date span by the specified @a factor. The product is
|
|
computed by multiplying each of the components by the @a factor.
|
|
|
|
@return A reference to this wxDateSpan object modified in place.
|
|
*/
|
|
wxDateSpan& operator*=(int factor);
|
|
|
|
/**
|
|
Returns @true if this date span is different from the other one.
|
|
*/
|
|
bool operator!=(const wxDateSpan& other) 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& other) const;
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
@class wxTimeSpan
|
|
|
|
wxTimeSpan class represents a time interval.
|
|
|
|
@library{wxbase}
|
|
@category{data}
|
|
|
|
@see @ref overview_datetime, wxDateTime
|
|
*/
|
|
class wxTimeSpan
|
|
{
|
|
public:
|
|
/**
|
|
Default constructor, constructs a zero timespan.
|
|
*/
|
|
wxTimeSpan();
|
|
/**
|
|
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(long hours, long min = 0, wxLongLong sec = 0, wxLongLong msec = 0);
|
|
|
|
/**
|
|
Returns the absolute value of the timespan: does not modify the object.
|
|
*/
|
|
wxTimeSpan Abs() const;
|
|
|
|
/**
|
|
Returns the sum of two time spans.
|
|
|
|
@return A new wxDateSpan object with the result.
|
|
*/
|
|
wxTimeSpan Add(const wxTimeSpan& diff) const;
|
|
/**
|
|
Adds the given wxTimeSpan to this wxTimeSpan and returns a reference
|
|
to itself.
|
|
*/
|
|
wxTimeSpan& Add(const wxTimeSpan& diff);
|
|
|
|
/**
|
|
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 %:
|
|
|
|
- @c H - Number of Hours
|
|
- @c M - Number of Minutes
|
|
- @c S - Number of Seconds
|
|
- @c l - Number of Milliseconds
|
|
- @c D - Number of Days
|
|
- @c E - Number of Weeks
|
|
- @c % - 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& format = wxDefaultTimeSpanFormat) const;
|
|
|
|
/**
|
|
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(wxLongLong ms);
|
|
|
|
/**
|
|
Returns the timespan for one minute.
|
|
*/
|
|
static wxTimeSpan Minute();
|
|
|
|
/**
|
|
Returns the timespan for the given number of minutes.
|
|
*/
|
|
static wxTimeSpan Minutes(long min);
|
|
|
|
/**
|
|
Returns the product of this time span by @a n.
|
|
|
|
@return A new wxTimeSpan object with the result.
|
|
*/
|
|
wxTimeSpan Multiply(int n) const;
|
|
/**
|
|
Multiplies this time span by @a n.
|
|
|
|
@return A reference to this wxTimeSpan object modified in place.
|
|
*/
|
|
wxTimeSpan& Multiply(int n);
|
|
|
|
/**
|
|
Negate the value of the timespan.
|
|
|
|
@see Negate()
|
|
*/
|
|
wxTimeSpan& Neg();
|
|
|
|
/**
|
|
Returns timespan with inverted sign.
|
|
|
|
@see Neg()
|
|
*/
|
|
wxTimeSpan Negate() const;
|
|
|
|
/**
|
|
Returns the timespan for one second.
|
|
*/
|
|
static wxTimeSpan Second();
|
|
|
|
/**
|
|
Returns the timespan for the given number of seconds.
|
|
*/
|
|
static wxTimeSpan Seconds(wxLongLong sec);
|
|
|
|
/**
|
|
Returns the difference of two time spans.
|
|
|
|
@return A new wxDateSpan object with the result.
|
|
*/
|
|
wxTimeSpan Subtract(const wxTimeSpan& diff) const;
|
|
/**
|
|
Subtracts the given wxTimeSpan to this wxTimeSpan and returns a
|
|
reference to itself.
|
|
*/
|
|
wxTimeSpan& Subtract(const wxTimeSpan& diff);
|
|
|
|
/**
|
|
Returns the timespan for one week.
|
|
*/
|
|
static wxTimeSpan Week();
|
|
|
|
/**
|
|
Returns the timespan for the given number of weeks.
|
|
*/
|
|
static wxTimeSpan Weeks(long weeks);
|
|
|
|
/**
|
|
Adds the given wxTimeSpan to this wxTimeSpan and returns the result.
|
|
*/
|
|
wxTimeSpan& operator+=(const wxTimeSpan& diff);
|
|
|
|
/**
|
|
Multiplies this time span by @a n.
|
|
|
|
@return A reference to this wxTimeSpan object modified in place.
|
|
*/
|
|
wxTimeSpan& operator*=(int n);
|
|
|
|
/**
|
|
Negate the value of the timespan.
|
|
|
|
@see Negate()
|
|
*/
|
|
wxTimeSpan& operator-();
|
|
|
|
/**
|
|
Subtracts the given wxTimeSpan to this wxTimeSpan and returns the
|
|
result.
|
|
*/
|
|
wxTimeSpan& operator-=(const wxTimeSpan& diff);
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
@class wxDateTimeHolidayAuthority
|
|
|
|
@todo Write wxDateTimeHolidayAuthority documentation.
|
|
|
|
@library{wxbase}
|
|
@category{data}
|
|
*/
|
|
class wxDateTimeHolidayAuthority
|
|
{
|
|
public:
|
|
|
|
};
|
|
|