DirEntry Class

class QDirListing::DirEntry

Liste aller Mitglieder, einschließlich geerbter Mitglieder
DirEntry ist Teil von Input/Output und Networking.

Öffentliche Funktionen

QString	absoluteFilePath() const
QString	absolutePath() const
QString	baseName() const
QDateTime	birthTime(const QTimeZone &tz) const
QString	bundleName() const
QString	canonicalFilePath() const
QString	completeBaseName() const
QString	completeSuffix() const
bool	exists() const
QFileInfo	fileInfo() const
QString	fileName() const
QString	filePath() const
QDateTime	fileTime(QFileDevice::FileTime type, const QTimeZone &tz) const
bool	isDir() const
bool	isExecutable() const
bool	isFile() const
bool	isHidden() const
bool	isReadable() const
bool	isSymLink() const
bool	isWritable() const
QDateTime	lastModified(const QTimeZone &tz) const
QDateTime	lastRead(const QTimeZone &tz) const
QDateTime	metadataChangeTime(const QTimeZone &tz) const
qint64	size() const
QString	suffix() const

Detaillierte Beschreibung

Die Dereferenzierung einer gültigen QDirListing::const_iterator gibt ein DirEntry-Objekt zurück.

DirEntry bietet eine Teilmenge der API von QFileInfo(zum Beispiel fileName(), filePath(), exists()). Intern konstruiert DirEntry nur dann ein QFileInfo Objekt, wenn es benötigt wird, d.h. wenn die Informationen nicht bereits von anderen Systemfunktionen abgerufen wurden. Sie können DirEntry::fileInfo() verwenden, um z.B. ein QFileInfo zu erhalten:

using ItFlag = QDirListing::IteratorFlag;
for (const auto &dirEntry : QDirListing(u"/etc"_s, ItFlag::Recursive)) {
    // Faster
    if (dirEntry.fileName().endsWith(u".conf")) { /* ... */ }

    // This works, but might be potentially slower, since it has to construct a
    // QFileInfo, whereas (depending on the implementation) the fileName could
    // be known already
    if (dirEntry.fileInfo().fileName().endsWith(u".conf")) { /* ... */ }
}
using ItFlag = QDirListing::IteratorFlag;
for (const auto &dirEntry : QDirListing(u"/etc"_s, ItFlag::Recursive)) {
    // Both approaches are the same, because DirEntry will have to construct
    // a QFileInfo to get this info (for example, by calling system stat())

    if (dirEntry.size() >= 4'000 /* 4KB */) { /* ...*/ }
    if (dirEntry.fileInfo().size() >= 4'000 /* 4KB */) { /* ... */ }
}

Dokumentation der Mitgliedsfunktionen

QDateTime DirEntry::birthTime(const QTimeZone &tz) const

QDateTime DirEntry::fileTime(QFileDevice::FileTime type, const QTimeZone &tz) const

QDateTime DirEntry::lastModified(const QTimeZone &tz) const

QDateTime DirEntry::lastRead(const QTimeZone &tz) const

QDateTime DirEntry::metadataChangeTime(const QTimeZone &tz) const

QFileInfo DirEntry::fileInfo() const

QString DirEntry::absoluteFilePath() const

QString DirEntry::absolutePath() const

QString DirEntry::baseName() const

QString DirEntry::bundleName() const

QString DirEntry::canonicalFilePath() const

QString DirEntry::completeBaseName() const

QString DirEntry::completeSuffix() const

QString DirEntry::fileName() const

QString DirEntry::filePath() const

QString DirEntry::suffix() const

bool DirEntry::exists() const

bool DirEntry::isDir() const

bool DirEntry::isExecutable() const

bool DirEntry::isFile() const

bool DirEntry::isHidden() const

bool DirEntry::isReadable() const

bool DirEntry::isSymLink() const

bool DirEntry::isWritable() const

qint64 DirEntry::size() const

Siehe die gleichnamigen QFileInfo Methoden.

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