KDECore
KSystemTimeZoneBackend Class Reference
[Time zone classes]
#include <ksystemtimezone.h>

Detailed Description
Backend class for KSystemTimeZone class.This class implements KSystemTimeZone's constructors and virtual methods. A backend class is required for all classes inherited from KTimeZone to allow KTimeZone virtual methods to work together with reference counting of private data.
Backend class for KSystemTimeZone class
- See also:
- KTimeZoneBackend, KSystemTimeZone, KTimeZone
Definition at line 233 of file ksystemtimezone.h.
Public Member Functions | |
virtual KTimeZoneBackend * | clone () const |
virtual bool | isDst (const KTimeZone *caller, time_t t) const |
virtual bool | isDstAtUtc (const KTimeZone *caller, const QDateTime &utcDateTime) const |
KSystemTimeZoneBackend (KSystemTimeZoneSource *source, const QString &name, const QString &countryCode, float latitude, float longitude, const QString &comment) | |
virtual int | offset (const KTimeZone *caller, time_t t) const |
virtual int | offsetAtUtc (const KTimeZone *caller, const QDateTime &utcDateTime) const |
virtual int | offsetAtZoneTime (const KTimeZone *caller, const QDateTime &zoneDateTime, int *secondOffset) const |
virtual QByteArray | type () const |
~KSystemTimeZoneBackend () |
Constructor & Destructor Documentation
KSystemTimeZoneBackend::KSystemTimeZoneBackend | ( | KSystemTimeZoneSource * | source, | |
const QString & | name, | |||
const QString & | countryCode, | |||
float | latitude, | |||
float | longitude, | |||
const QString & | comment | |||
) |
KSystemTimeZoneBackend::~KSystemTimeZoneBackend | ( | ) |
Definition at line 431 of file ksystemtimezone.cpp.
Member Function Documentation
KTimeZoneBackend * KSystemTimeZoneBackend::clone | ( | ) | const [virtual] |
Creates a copy of this instance.
- Returns:
- new copy
Reimplemented from KTimeZoneBackend.
Definition at line 434 of file ksystemtimezone.cpp.
Implements KSystemTimeZone::isDst().
Returns whether daylight savings time is in operation at a specified UTC time.
- Parameters:
-
caller calling KSystemTimeZone object t the UTC time, measured in seconds since 00:00:00 UTC 1st January 1970 (as returned by time(2))
- Returns:
true
if daylight savings time is in operation,false
otherwise
Reimplemented from KTimeZoneBackend.
Definition at line 553 of file ksystemtimezone.cpp.
bool KSystemTimeZoneBackend::isDstAtUtc | ( | const KTimeZone * | caller, | |
const QDateTime & | utcDateTime | |||
) | const [virtual] |
Implements KSystemTimeZone::isDstAtUtc().
Returns whether daylight savings time is in operation at the given UTC date/time.
Note that system times are represented using time_t. An error occurs if the date falls outside the range supported by time_t.
- Parameters:
-
caller calling KSystemTimeZone object utcDateTime the UTC date/time. An error occurs if utcDateTime.timeSpec()
is not Qt::UTC.
- Returns:
true
if daylight savings time is in operation,false
otherwise
Reimplemented from KTimeZoneBackend.
Definition at line 548 of file ksystemtimezone.cpp.
int KSystemTimeZoneBackend::offset | ( | const KTimeZone * | caller, | |
time_t | t | |||
) | const [virtual] |
Implements KSystemTimeZone::offset().
Returns the offset of this time zone to UTC at a specified UTC time.
The offset is the number of seconds which you must add to UTC to get local time in this time zone.
- Parameters:
-
caller calling KSystemTimeZone object t the UTC time at which the offset is to be calculated, measured in seconds since 00:00:00 UTC 1st January 1970 (as returned by time(2))
- Returns:
- offset in seconds, or 0 if error
Reimplemented from KTimeZoneBackend.
Definition at line 518 of file ksystemtimezone.cpp.
int KSystemTimeZoneBackend::offsetAtUtc | ( | const KTimeZone * | caller, | |
const QDateTime & | utcDateTime | |||
) | const [virtual] |
Implements KSystemTimeZone::offsetAtUtc().
Returns the offset of this time zone to UTC at the given UTC date/time.
The offset is the number of seconds which you must add to UTC to get local time in this time zone.
Note that system times are represented using time_t. An error occurs if the date falls outside the range supported by time_t.
- Parameters:
-
caller calling KSystemTimeZone object utcDateTime the UTC date/time at which the offset is to be calculated. An error occurs if utcDateTime.timeSpec()
is not Qt::UTC.
- Returns:
- offset in seconds, or 0 if error
Reimplemented from KTimeZoneBackend.
Definition at line 513 of file ksystemtimezone.cpp.
int KSystemTimeZoneBackend::offsetAtZoneTime | ( | const KTimeZone * | caller, | |
const QDateTime & | zoneDateTime, | |||
int * | secondOffset | |||
) | const [virtual] |
Implements KSystemTimeZone::offsetAtZoneTime().
Returns the offset of this time zone to UTC at the given local date/time. Because of daylight savings time shifts, the date/time may occur twice. Optionally, the offsets at both occurrences of dateTime
are calculated.
The offset is the number of seconds which you must add to UTC to get local time in this time zone.
- Parameters:
-
caller calling KSystemTimeZone object zoneDateTime the date/time at which the offset is to be calculated. This is interpreted as a local time in this time zone. An error occurs if zoneDateTime.timeSpec()
is not Qt::LocalTime.secondOffset if non-null, and the zoneDateTime
occurs twice, receives the UTC offset for the second occurrence. Otherwise, it is set the same as the return value.
- Returns:
- offset in seconds. If
zoneDateTime
occurs twice, it is the offset at the first occurrence which is returned.
Reimplemented from KTimeZoneBackend.
Definition at line 444 of file ksystemtimezone.cpp.
QByteArray KSystemTimeZoneBackend::type | ( | ) | const [virtual] |
Returns the class name of the data represented by this instance.
- Returns:
- "KSystemTimeZone"
Reimplemented from KTimeZoneBackend.
Definition at line 439 of file ksystemtimezone.cpp.
The documentation for this class was generated from the following files: