// Purpose: interface of wxDateTime
// Author: wxWidgets team
// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/**
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
+ 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
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
+ messages on the Internet. This format cannot be described with
@c strptime(3)-like format strings used by Format(), hence the need for a
separate function.
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
+ ParseDate() can parse the strings such as "tomorrow", "March first" and
even "next Sunday".
Finally notice that each of the parsing functions is available in several
class wxDateTime
{
public:
+ /**
+ A small unsigned integer type for storing things like minutes,
+ seconds &c. It should be at least short (i.e. not char) to contain
+ the number of milliseconds - it may also be 'int' because there is
+ no size penalty associated with it in our code, we don't store any
+ data in this format.
+ */
+ typedef unsigned short wxDateTime_t;
+
+
+ /**
+ Time zone symbolic names.
+ */
+ enum TZ
+ {
+ /// the time in the current time zone
+ Local,
+
+ //@{
+ /// zones from GMT (= Greenwich 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
+ };
+
+ /**
+ 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.
+ */
+ enum Calendar
+ {
+ Gregorian, ///< calendar currently in use in Western countries
+ Julian ///< calendar in use since -45 until the 1582 (or later)
+ };
+
+ /**
+ 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.
+ */
+ 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
+ };
+
+ /// symbolic names for the months
+ enum Month
+ {
+ Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec,
+
+ /// Invalid month value.
+ Inv_Month
+ };
+
+ /// symbolic names for the weekdays
+ enum WeekDay
+ {
+ Sun, Mon, Tue, Wed, Thu, Fri, Sat,
+
+ /// Invalid week day value.
+ Inv_WeekDay
+ };
+
+ /// invalid value for the year
+ enum Year
+ {
+ Inv_Year = SHRT_MIN // should hold in wxDateTime_t
+ };
+
+ /**
+ Flags to be used with GetMonthName() and GetWeekDayName() functions.
+ */
+ enum NameFlags
+ {
+ Name_Full = 0x01, ///< return full name
+ Name_Abbr = 0x02 ///< return abbreviated name
+ };
+
+ /**
+ Different parts of the world use different conventions for the week start.
+ In some countries, the week starts on Sunday, while in others -- on Monday.
+ The ISO standard doesn't address this issue, so we support both conventions
+ in the functions whose result depends on it (GetWeekOfYear() and
+ GetWeekOfMonth()).
+
+ The desired behaviour may be specified by giving one of the following
+ constants as argument to these functions.
+ */
+ 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
+ };
+
+
+ /**
+ Contains broken down date-time representation.
+
+ This struct is analogous to standard C <code>struct tm</code> and uses
+ the same, not always immediately obvious, conventions for its members:
+ notably its mon and mday fields count from 0 while yday counts from 1.
+ */
+ struct Tm
+ {
+ wxDateTime_t msec, ///< Number of milliseconds.
+ sec, ///< Seconds in 0..59 (60 with leap seconds) range.
+ min, ///< Minutes in 0..59 range.
+ hour, ///< Hours since midnight in 0..23 range.
+ mday, ///< Day of the month in 1..31 range.
+ yday; ///< Day of the year in 0..365 range.
+ Month mon; ///< Month, as an enumerated constant.
+ int year; ///< Year.
+
+ /**
+ Check if the given date/time is valid (in Gregorian calendar).
+
+ Return @false if the components don't correspond to a correct date.
+ */
+ bool IsValid() const;
+
+ /**
+ Return the week day corresponding to this date.
+
+ Unlike the other fields, the week day is not always available and
+ so must be accessed using this method as it is computed on demand
+ when it is called.
+ */
+ WeekDay GetWeekDay();
+ };
+
+
/**
@name Constructors, Assignment Operators and Setters
Constructors and various Set() methods are collected here. If you
construct a date object from separate values for day, month and year,
you should use IsValid() method to check that the values were correct
- as constructors can not return an error code.
+ as constructors cannot return an error code.
*/
//@{
Returns the ordinal number of the week in the month (in 1-5 range).
As GetWeekOfYear(), this function supports both conventions for the
- week start. See the description of these @c WeekFlags in the
- @ref datetime_constants section.
+ week start.
*/
wxDateTime_t GetWeekOfMonth(WeekFlags flags = Monday_First,
const TimeZone& tz = Local) const;
year. Accordingly, the week number will always be in 1-53 range (52 for
non-leap years).
- The function depends on the @ref datetime_constants "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.
+ 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.
*/
wxDateTime_t GetWeekOfYear(WeekFlags flags = Monday_First,
const TimeZone& tz = Local) 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 seprator if a more human-readable combined
+ be useful to use a space as separator if a more human-readable combined
date-time representation is needed.
@see FormatISODate(), FormatISOTime(), ParseISOCombined()
/**
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.
-
- @return @NULL if the conversion failed, otherwise return the pointer
- to the character which stopped the scan.
+ be specified.
- @see Format()
- */
- const char* ParseDate(const wxString& date,
- wxString::const_iterator* end = NULL);
+ It is thus less flexible then ParseDateTime(), but also has less
+ chances to misinterpret the user input.
- /**
- @overload
- */
- const char* ParseDate(const char* date);
+ See ParseFormat() for the description of function parameters and return
+ value.
- /**
- @overload
+ @see Format()
*/
- const wchar_t* ParseDate(const wchar_t* date);
+ 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 can
- not be parsed in any way at all.
+ format.
- @return @NULL if the conversion failed, otherwise return the pointer
- to the character which stopped the scan.
- */
- const char* ParseDateTime(const wxString& datetime,
- wxString::const_iterator* end = NULL);
-
- /**
- @overload
- */
- const char* ParseDateTime(const char* datetime);
+ 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.
- /**
- @overload
+ See ParseFormat() for the description of function parameters and return
+ value.
*/
- const wchar_t* ParseDateTime(const wchar_t* datetime);
+ bool ParseDateTime(const wxString& datetime, wxString::const_iterator *end);
/**
This function parses the string @a date according to the given
@a dateDef. If it is not specified, Today() is used as the default
date.
- @return @NULL if the conversion failed, otherwise return the pointer
- to the character which stopped the scan.
+ 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()
*/
- const char* ParseFormat(const wxString& date,
- const wxString& format = wxDefaultDateTimeFormat,
- const wxDateTime& dateDef = wxDefaultDateTime,
- wxString::const_iterator* end = NULL);
+ bool ParseFormat(const wxString& date,
+ const wxString& format,
+ const wxDateTime& dateDef,
+ wxString::const_iterator *end);
/**
@overload
*/
- const char* ParseFormat(const char* date,
- const wxString& format = wxDefaultDateTimeFormat,
- const wxDateTime& dateDef = wxDefaultDateTime);
+ bool ParseFormat(const wxString& date,
+ const wxString& format,
+ wxString::const_iterator *end);
/**
@overload
*/
- const wchar_t* ParseFormat(const wchar_t* date,
- const wxString& format = wxDefaultDateTimeFormat,
- const wxDateTime& dateDef = wxDefaultDateTime);
+ bool ParseFormat(const wxString& date, wxString::const_iterator *end);
/**
This function parses the string containing the date and time in ISO
string which is not RFC 822 compliant. If you need to parse date
formatted in more free ways, you should use ParseDateTime() or
ParseDate() instead.
- */
- const char* ParseRfc822Date(const wxString& date,
- wxString::const_iterator* end = NULL);
- /**
- @overload
+ See ParseFormat() for the description of function parameters and return
+ value.
*/
- const char* ParseRfc822Date(const char* date);
-
- /**
- @overload
- */
- const wchar_t* ParseRfc822Date(const wchar_t* date);
+ 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.
- @return @NULL if the conversion failed, otherwise return the pointer
- to the character which stopped the scan.
- */
- const char* ParseTime(const wxString& time,
- wxString::const_iterator* end = NULL);
-
- /**
- @overload
+ See ParseFormat() for the description of function parameters and return
+ value.
*/
- const char* ParseTime(const char* time);
-
- /**
- @overload
- */
- const wchar_t* ParseTime(const wchar_t* time);
+ bool ParseTime(const wxString& time, wxString::const_iterator *end);
//@}
static int GetCurrentYear(Calendar cal = Gregorian);
/**
- Gets the full (default) or abbreviated (specify @c Name_Abbr name of
- the given month.
+ 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 time_t GetTimeNow();
/**
- Returns the current time broken down using the buffer whose adress is
+ 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);
static tm* GetTmNow();
/**
- Gets the full (default) or abbreviated (specify @c Name_Abbr) name of
- the given week day.
+ 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);
+ NameFlags flags = Name_Full);
/**
Returns @true if DST was used in the given year (the current one by
Sets the country to use by default. This setting influences the DST
calculations, date formatting and other things.
- The possible values for @a country parameter are enumerated in the
- @ref datetime_constants section.
-
@see GetCountry()
*/
static void SetCountry(Country country);
*/
const wxDateTime wxDefaultDateTime;
+/*
+ wxInvalidDateTime is an alias for wxDefaultDateTime.
+*/
+#define wxInvalidDateTime wxDefaultDateTime
/**
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