diff options
author | Ahmad Samir <a.samirh78@gmail.com> | 2022-12-24 00:12:45 +0200 |
---|---|---|
committer | Ahmad Samir <a.samirh78@gmail.com> | 2023-01-06 17:52:07 +0200 |
commit | fe7a0c19a64d339996e1429c8e31fedf919d0668 (patch) | |
tree | c25d3aad18a9f56ec44484d08cea58aa61625e3e /src/gui/itemmodels/qfilesystemmodel.cpp | |
parent | eeb469869e4fe7fd873bb9e8a0185ec7afc6d332 (diff) |
QFileSystemModel: add lastModified() overload that takes a QTimeZone
This is useful when sorting by time and using QTimeZone::UTC, since
native filesystem API uses UTC, that means less conversions, which is
potentially faster.
Use UTC internally except for strings that are going to be shown in a
GUI to the user, these should be in QTimeZone::LocalTime.
[ChangeLog][QtGui][QFileSystemModel] Added lastModified() overload that
takes a QTimeZone, this is useful when e.g. comparing file timestamps
and all that's needed is time in UTC (this is faster as no time zone
conversions is required). QTimeZone::UTC is used internally when sorting
by time (using the sort() function), which should ideally make it
faster too.
Task-number: QTBUG-100349
Change-Id: I0e58f8eb7856b8da7d55db86ddd2c009ff83d970
Reviewed-by: Kai Köhne <kai.koehne@qt.io>
Diffstat (limited to 'src/gui/itemmodels/qfilesystemmodel.cpp')
-rw-r--r-- | src/gui/itemmodels/qfilesystemmodel.cpp | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/src/gui/itemmodels/qfilesystemmodel.cpp b/src/gui/itemmodels/qfilesystemmodel.cpp index d44e89fde0..efe0b568c8 100644 --- a/src/gui/itemmodels/qfilesystemmodel.cpp +++ b/src/gui/itemmodels/qfilesystemmodel.cpp @@ -529,14 +529,38 @@ QString QFileSystemModel::type(const QModelIndex &index) const } /*! - Returns the date and time when \a index was last modified. + Returns the date and time (in local time) when \a index was last modified. + + This is an overloaded function, equivalent to calling: + \code + lastModified(index, QTimeZone::LocalTime); + \endcode + + If \a index is invalid, a default constructed QDateTime is returned. */ QDateTime QFileSystemModel::lastModified(const QModelIndex &index) const { + return lastModified(index, QTimeZone::LocalTime); +} + +/*! + \since 6.6 + Returns the date and time, in the time zone \a tz, when + \a index was last modified. + + Typical arguments for \a tz are \c QTimeZone::UTC or \c QTimeZone::LocalTime. + UTC does not require any conversion from the time returned by the native file + system API, therefore getting the time in UTC is potentially faster. LocalTime + is typically chosen if the time is shown to the user. + + If \a index is invalid, a default constructed QDateTime is returned. + */ +QDateTime QFileSystemModel::lastModified(const QModelIndex &index, const QTimeZone &tz) const +{ Q_D(const QFileSystemModel); if (!index.isValid()) return QDateTime(); - return d->node(index)->lastModified(); + return d->node(index)->lastModified(tz); } /*! @@ -765,7 +789,7 @@ QString QFileSystemModelPrivate::time(const QModelIndex &index) const if (!index.isValid()) return QString(); #if QT_CONFIG(datestring) - return QLocale::system().toString(node(index)->lastModified(), QLocale::ShortFormat); + return QLocale::system().toString(node(index)->lastModified(QTimeZone::LocalTime), QLocale::ShortFormat); #else Q_UNUSED(index); return QString(); @@ -1027,10 +1051,12 @@ public: } case 3: { - if (l->lastModified() == r->lastModified()) + const QDateTime left = l->lastModified(QTimeZone::UTC); + const QDateTime right = r->lastModified(QTimeZone::UTC); + if (left == right) return naturalCompare.compare(l->fileName, r->fileName) < 0; - return l->lastModified() < r->lastModified(); + return left < right; } } Q_ASSERT(false); |