DirEntry Class
class QDirListing::DirEntry- 継承メンバを含む全メンバ一覧
- DirEntry はInput/Output および Networking に含まれます。
パブリック関数
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 |
詳細説明
有効なQDirListing::const_iterator を再参照すると、DirEntry オブジェクトが返されます。
DirEntry は、QFileInfo の API のサブセット (たとえば、fileName()、filePath()、exists()) を提供します。内部的には、DirEntry は、必要な場合、つまり他のシステム関数によって情報がまだ取得されていない場合にのみ、QFileInfo オブジェクトを構築します。QFileInfo を取得するにはDirEntry::fileInfo() を使用します:
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 */) { /* ... */ } }
メンバー関数ドキュメント
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
同名のQFileInfo メソッドを参照。
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