内容

• 公共类型
• 公共函数
• 重实现公共函数
• 静态公共成员
• 详细描述

QFSFileEngine Class

The QFSFileEngine class implements Qt's default file engine. 更多...

头：	#include <QFSFileEngine>
Since:	Qt 4.1
继承：	QAbstractFileEngine

• 所有成员列表，包括继承成员

公共类型

typedef

Iterator

公共函数

	QFSFileEngine ()
	QFSFileEngine (const QString & file )
	~QFSFileEngine ()
bool	open (QIODevice::OpenMode openMode , FILE * fh )
bool	open (QIODevice::OpenMode openMode , int fd )
bool	open (QIODevice::OpenMode openMode , int fd , QFile::FileHandleFlags handleFlags )
bool	open (QIODevice::OpenMode openMode , FILE * fh , QFile::FileHandleFlags handleFlags )
bool	open (QIODevice::OpenMode openMode , const RFile & file , QFile::FileHandleFlags handleFlags )

重实现公共函数

virtual bool	caseSensitive () const
virtual bool	close ()
virtual bool	copy (const QString & copyName )
virtual bool	extension (Extension extension , const ExtensionOption * option = 0, ExtensionReturn * output = 0)
virtual FileFlags	fileFlags (FileFlags type ) const
virtual QString	fileName (FileName file ) const
virtual QDateTime	fileTime (FileTime time ) const
virtual bool	flush ()
virtual int	handle () const
virtual bool	isRelativePath () const
virtual bool	isSequential () const
virtual bool	link (const QString & newName )
virtual bool	mkdir (const QString & name , bool createParentDirectories ) const
virtual bool	open (QIODevice::OpenMode openMode )
virtual QString	owner (FileOwner own ) const
virtual uint	ownerId (FileOwner own ) const
virtual qint64	pos () const
virtual qint64	read (char * data , qint64 maxlen )
virtual qint64	readLine (char * data , qint64 maxlen )
virtual bool	remove ()
virtual bool	rename (const QString & newName )
virtual bool	rmdir (const QString & name , bool recurseParentDirectories ) const
virtual bool	seek (qint64 pos )
virtual void	setFileName (const QString & file )
virtual bool	setPermissions (uint perms )
virtual bool	setSize (qint64 size )
virtual qint64	size () const
virtual bool	supportsExtension (Extension extension ) const
virtual qint64	write (const char * data , qint64 len )

• 36 公共函数继承自 QAbstractFileEngine

静态公共成员

QString	currentPath (const QString & fileName = QString())
QFileInfoList	drives ()
QString	homePath ()
QString	rootPath ()
bool	setCurrentPath (const QString & path )
QString	tempPath ()

• 1 静态公共成员继承自 QAbstractFileEngine

额外继承成员

• 1 保护函数继承自 QAbstractFileEngine

详细描述

The QFSFileEngine class implements Qt's default file engine.

This class is part of the file engine framework in Qt. If you only want to access files or directories, use QFile , QFileInfo or QDir 代替。

QFSFileEngine is the default file engine for accessing regular files. It is provided for convenience; by subclassing this class, you can alter its behavior slightly, without having to write a complete QAbstractFileEngine subclass. To install your custom file engine, you must also subclass QAbstractFileEngineHandler and create an instance of your handler.

It can also be useful to create a QFSFileEngine object directly if you need to use the local file system inside QAbstractFileEngine::create (), in order to avoid recursion (as higher-level classes tend to call QAbstractFileEngine::create ()).

成员函数文档编制

QFSFileEngine:: QFSFileEngine ()

构造 QFSFileEngine .

QFSFileEngine:: QFSFileEngine (const QString & file )

构造 QFSFileEngine for the file name file .

QFSFileEngine:: ~QFSFileEngine ()

销毁 QFSFileEngine .

[虚拟] bool QFSFileEngine:: caseSensitive () const

重实现自 QAbstractFileEngine::caseSensitive ().

Returns true for Windows, false for Unix.

[虚拟] bool QFSFileEngine:: close ()

重实现自 QAbstractFileEngine::close ().

[虚拟] bool QFSFileEngine:: copy (const QString & copyName )

重实现自 QAbstractFileEngine::copy ().

For windows, copy the file to file copyName .

Not implemented for Unix.

[static] QString QFSFileEngine:: currentPath (const QString & fileName = QString())

For Unix, returns the current working directory for the file engine.

For Windows, returns the canonicalized form of the current path used by the file engine for the drive specified by fileName . On Windows, each drive has its own current directory, so a different path is returned for file names that include different drive names (e.g. A: or C:).

另请参阅 setCurrentPath ().

[static] QFileInfoList QFSFileEngine:: drives ()

For Windows, returns the list of drives in the file system as a list of QFileInfo objects. On unix, Mac OS X and Windows CE, only the root path is returned. On Windows, this function returns all drives (A:, C:, D:, etc.).

For Unix, the list contains just the root path "/".

[虚拟] bool QFSFileEngine:: extension ( Extension extension , const ExtensionOption * option = 0, ExtensionReturn * output = 0)

重实现自 QAbstractFileEngine::extension ().

[虚拟] FileFlags QFSFileEngine:: fileFlags ( FileFlags type ) const

重实现自 QAbstractFileEngine::fileFlags ().

[虚拟] QString QFSFileEngine:: fileName ( FileName file ) const

重实现自 QAbstractFileEngine::fileName ().

另请参阅 setFileName ().

[虚拟] QDateTime QFSFileEngine:: fileTime ( FileTime time ) const

重实现自 QAbstractFileEngine::fileTime ().

[虚拟] bool QFSFileEngine:: flush ()

重实现自 QAbstractFileEngine::flush ().

[虚拟] int QFSFileEngine:: handle () const

重实现自 QAbstractFileEngine::handle ().

[static] QString QFSFileEngine:: homePath ()

Returns the home path of the current user.

另请参阅 rootPath ().

[虚拟] bool QFSFileEngine:: isRelativePath () const

重实现自 QAbstractFileEngine::isRelativePath ().

[虚拟] bool QFSFileEngine:: isSequential () const

重实现自 QAbstractFileEngine::isSequential ().

[虚拟] bool QFSFileEngine:: link (const QString & newName )

重实现自 QAbstractFileEngine::link ().

Creates a link from the file currently specified by fileName () 到 newName . What a link is depends on the underlying filesystem (be it a shortcut on Windows or a symbolic link on Unix). Returns true if successful; otherwise returns false.

[虚拟] bool QFSFileEngine:: mkdir (const QString & name , bool createParentDirectories ) const

重实现自 QAbstractFileEngine::mkdir ().

[虚拟] bool QFSFileEngine:: open ( QIODevice::OpenMode openMode )

重实现自 QAbstractFileEngine::open ().

bool QFSFileEngine:: open ( QIODevice::OpenMode openMode , FILE * fh )

Opens the file handle fh in openMode mode. Returns true on success; otherwise returns false.

bool QFSFileEngine:: open ( QIODevice::OpenMode openMode , int fd )

Opens the file descriptor fd in openMode mode. Returns true on success; otherwise returns false.

bool QFSFileEngine:: open ( QIODevice::OpenMode openMode , int fd , QFile::FileHandleFlags handleFlags )

Opens the file descriptor fd in openMode mode. Returns true on success; otherwise returns false.

The handleFlags argument specifies whether the file handle will be closed by Qt. See the QFile::FileHandleFlags 文档编制，了解更多信息。

bool QFSFileEngine:: open ( QIODevice::OpenMode openMode , FILE * fh , QFile::FileHandleFlags handleFlags )

Opens the file handle fh in openMode mode. Returns true on success; otherwise returns false.

The handleFlags argument specifies whether the file handle will be closed by Qt. See the QFile::FileHandleFlags 文档编制，了解更多信息。

bool QFSFileEngine:: open ( QIODevice::OpenMode openMode , const RFile & file , QFile::FileHandleFlags handleFlags )

Opens the file descriptor specified by file in the mode given by openMode . Returns true on success; otherwise returns false.

The handleFlags argument specifies whether the file handle will be closed by Qt. See the QFile::FileHandleFlags 文档编制，了解更多信息。

[虚拟] QString QFSFileEngine:: owner ( FileOwner own ) const

重实现自 QAbstractFileEngine::owner ().

[虚拟] uint QFSFileEngine:: ownerId ( FileOwner own ) const

重实现自 QAbstractFileEngine::ownerId ().

In Unix, if stat() is successful, the uid is returned if own is the owner. Otherwise the gid is returned. If stat() is unsuccessful, -2 is reuturned.

For Windows, -2 is always returned.

[虚拟] qint64 QFSFileEngine:: pos () const

重实现自 QAbstractFileEngine::pos ().

[虚拟] qint64 QFSFileEngine:: read ( char * data , qint64 maxlen )

重实现自 QAbstractFileEngine::read ().

[虚拟] qint64 QFSFileEngine:: readLine ( char * data , qint64 maxlen )

重实现自 QAbstractFileEngine::readLine ().

[虚拟] bool QFSFileEngine:: remove ()

重实现自 QAbstractFileEngine::remove ().

[虚拟] bool QFSFileEngine:: rename (const QString & newName )

重实现自 QAbstractFileEngine::rename ().

[虚拟] bool QFSFileEngine:: rmdir (const QString & name , bool recurseParentDirectories ) const

重实现自 QAbstractFileEngine::rmdir ().

[static] QString QFSFileEngine:: rootPath ()

Returns the root path.

另请参阅 homePath ().

[虚拟] bool QFSFileEngine:: seek ( qint64 pos )

重实现自 QAbstractFileEngine::seek ().

[static] bool QFSFileEngine:: setCurrentPath (const QString & path )

Sets the current path (e.g., for QDir ), to path . Returns true if the new path exists; otherwise this function does nothing, and returns false.

另请参阅 currentPath ().

[虚拟] void QFSFileEngine:: setFileName (const QString & file )

重实现自 QAbstractFileEngine::setFileName ().

另请参阅 fileName ().

[虚拟] bool QFSFileEngine:: setPermissions ( uint perms )

重实现自 QAbstractFileEngine::setPermissions ().

[虚拟] bool QFSFileEngine:: setSize ( qint64 size )

重实现自 QAbstractFileEngine::setSize ().

另请参阅 size ().

[虚拟] qint64 QFSFileEngine:: size () const

重实现自 QAbstractFileEngine::size ().

另请参阅 setSize ().

[虚拟] bool QFSFileEngine:: supportsExtension ( Extension extension ) const

重实现自 QAbstractFileEngine::supportsExtension ().

[static] QString QFSFileEngine:: tempPath ()

Returns the temporary path (i.e., a path in which it is safe to store temporary files).

[虚拟] qint64 QFSFileEngine:: write (const char * data , qint64 len )

重实现自 QAbstractFileEngine::write ().