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KDECore

KSystemTimeZoneBackend Class Reference
[Time zone classes]

Backend class for KSystemTimeZone class. More...

#include <ksystemtimezone.h>

Inheritance diagram for KSystemTimeZoneBackend:
KTimeZoneBackend

List of all members.

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 ()

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
Author:
David Jarvie <djarvie@kde.org>.

Definition at line 304 of file ksystemtimezone.h.


Constructor & Destructor Documentation

KSystemTimeZoneBackend::KSystemTimeZoneBackend ( KSystemTimeZoneSource *  source,
const QString &  name,
const QString &  countryCode,
float  latitude,
float  longitude,
const QString &  comment 
)

Implements KSystemTimeZone::KSystemTimeZone().

Definition at line 520 of file ksystemtimezone.cpp.

KSystemTimeZoneBackend::~KSystemTimeZoneBackend (  ) 

Definition at line 525 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 528 of file ksystemtimezone.cpp.

bool KSystemTimeZoneBackend::isDst ( const KTimeZone *  caller,
time_t  t 
) const [virtual]

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 647 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 642 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 612 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 607 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 538 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 533 of file ksystemtimezone.cpp.


The documentation for this class was generated from the following files:
  • ksystemtimezone.h
  • ksystemtimezone.cpp

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