#include <qqmlpreviewfileengine.h>

Inheritance diagram for QQmlPreviewFileEngine:

Collaboration diagram for QQmlPreviewFileEngine:

Public Member Functions
	QQmlPreviewFileEngine (const QString &file, const QString &absolute, QQmlPreviewFileLoader *loader)

void	setFileName (const QString &file) override
	Sets the file engine's file name to file.

bool	open (QIODevice::OpenMode flags, std::optional< QFile::Permissions > permissions) override
	Opens the file in the specified mode.

bool	close () override
	Closes the file, returning true if successful; otherwise returns `false`.

qint64	size () const override
	Returns the size of the file.

qint64	pos () const override
	Returns the current file position.

bool	seek (qint64) override
	Sets the file position to the given offset.

qint64	read (char *data, qint64 maxlen) override
	Reads a number of characters from the file into data.

FileFlags	fileFlags (FileFlags type) const override
	This function should return the set of OR'd flags that are true for the file engine's file, and that are in the type's OR'd members.

QString	fileName (QAbstractFileEngine::FileName file) const override
	Return the file engine's current file name in the format specified by file.

uint	ownerId (FileOwner) const override
	If owner is `OwnerUser` return the ID of the user who owns the file.

IteratorUniquePtr	beginEntryList (const QString &path, QDir::Filters filters, const QStringList &filterNames) override
	Returns a QAbstractFileEngine::IteratorUniquePtr, that can be used to iterate over the entries in path, using filters for entry filtering and filterNames for name filtering.

IteratorUniquePtr	endEntryList () override

bool	flush () override
	Flushes the open file, returning true if successful; otherwise returns false.

bool	syncToDisk () override

bool	isSequential () const override
	Returns `true` if the file is a sequential access device; returns false if the file is a direct access device.

bool	remove () override
	Requests that the file is deleted from the file system.

bool	copy (const QString &newName) override
	Copies the contents of this file to a file with the name newName.

bool	rename (const QString &newName) override
	Requests that the file be renamed to newName in the file system.

bool	renameOverwrite (const QString &newName) override

bool	link (const QString &newName) override
	Creates a link from the file currently specified by fileName() to newName.

bool	mkdir (const QString &dirName, bool createParentDirectories, std::optional< QFile::Permissions > permissions=std::nullopt) const override
	Requests that the directory dirName be created with the specified permissions.

bool	rmdir (const QString &dirName, bool recurseParentDirectories) const override
	Requests that the directory dirName is deleted from the file system.

bool	setSize (qint64 size) override
	Requests that the file be set to size size.

bool	caseSensitive () const override
	Should return true if the underlying file system is case-sensitive; otherwise return false.

bool	isRelativePath () const override
	Return true if the file referred to by this file engine has a relative path; otherwise return false.

QStringList	entryList (QDir::Filters filters, const QStringList &filterNames) const override
	Requests that a list of all the files matching the filters list based on the filterNames in the file engine's directory are returned.

bool	setPermissions (uint perms) override
	Requests that the file's permissions be set to perms.

QByteArray	id () const override

QString	owner (FileOwner) const override
	If owner is `OwnerUser` return the name of the user who owns the file.

QDateTime	fileTime (QFile::FileTime time) const override
	If time is `BirthTime`, return when the file was born (created).

int	handle () const override
	Returns the native file handle for this file engine.

qint64	readLine (char *data, qint64 maxlen) override
	This function reads one line, terminated by a '\n' character, from the file info data.

qint64	write (const char *data, qint64 len) override
	Writes len bytes from data to the file.

bool	extension (Extension extension, const ExtensionOption option, ExtensionReturn output) override

bool	supportsExtension (Extension extension) const override

Public Member Functions inherited from QAbstractFileEngine
virtual	~QAbstractFileEngine ()
	Destroys the QAbstractFileEngine.

virtual bool	setFileTime (const QDateTime &newDate, QFile::FileTime time)

virtual bool	cloneTo (QAbstractFileEngine *target)

bool	atEnd () const

uchar *	map (qint64 offset, qint64 size, QFile::MemoryMapFlags flags)

bool	unmap (uchar *ptr)

QFile::FileError	error () const
	Returns the QFile::FileError that resulted from the last failed operation.

QString	errorString () const
	Returns the human-readable message appropriate to the current error reported by error().

Additional Inherited Members
Public Types inherited from QAbstractFileEngine
enum	FileFlag { ReadOwnerPerm = 0x4000 , WriteOwnerPerm = 0x2000 , ExeOwnerPerm = 0x1000 , ReadUserPerm = 0x0400 , WriteUserPerm = 0x0200 , ExeUserPerm = 0x0100 , ReadGroupPerm = 0x0040 , WriteGroupPerm = 0x0020 , ExeGroupPerm = 0x0010 , ReadOtherPerm = 0x0004 , WriteOtherPerm = 0x0002 , ExeOtherPerm = 0x0001 , LinkType = 0x10000 , FileType = 0x20000 , DirectoryType = 0x40000 , BundleType = 0x80000 , HiddenFlag = 0x0100000 , LocalDiskFlag = 0x0200000 , ExistsFlag = 0x0400000 , RootFlag = 0x0800000 , Refresh = 0x1000000 , PermsMask = 0x0000FFFF , TypesMask = 0x000F0000 , FlagsMask = 0x0FF00000 , FileInfoAll = FlagsMask \| PermsMask \| TypesMask }
	The permissions and types of a file, suitable for OR'ing together. More...

enum	FileName { DefaultName , BaseName , PathName , AbsoluteName , AbsolutePathName , AbsoluteLinkTarget , CanonicalName , CanonicalPathName , BundleName , JunctionName , RawLinkPath , NFileNames }
	These values are used to request a file name in a particular format. More...

enum	FileOwner { OwnerUser , OwnerGroup }
	\value OwnerUser The user who owns the file. More...

enum	Extension { AtEndExtension , FastReadLineExtension , MapExtension , UnMapExtension }

typedef QAbstractFileEngineIterator	Iterator

using	IteratorUniquePtr = std::unique_ptr<Iterator>

Static Public Member Functions inherited from QAbstractFileEngine
static std::unique_ptr< QAbstractFileEngine >	create (const QString &fileName)
	Creates and returns a QAbstractFileEngine suitable for processing fileName.

Protected Member Functions inherited from QAbstractFileEngine
void	setError (QFile::FileError error, const QString &str)
	Sets the error type to error, and the error string to errorString.

	QAbstractFileEngine ()
	Constructs a new QAbstractFileEngine that does not refer to any file or directory.

	QAbstractFileEngine (QAbstractFileEnginePrivate &)

Protected Attributes inherited from QAbstractFileEngine
QScopedPointer< QAbstractFileEnginePrivate >	d_ptr

Detailed Description

Definition at line 29 of file qqmlpreviewfileengine.h.

Constructor & Destructor Documentation

◆ QQmlPreviewFileEngine()

QQmlPreviewFileEngine::QQmlPreviewFileEngine	(	const QString &	file,
		const QString &	absolute,
		QQmlPreviewFileLoader *	loader )

Definition at line 83 of file qqmlpreviewfileengine.cpp.

Member Function Documentation

◆ beginEntryList()

QAbstractFileEngine::IteratorUniquePtr QQmlPreviewFileEngine::beginEntryList	(	const QString &	path,
		QDir::Filters	filters,
		const QStringList &	filterNames )

overridevirtual

Returns a QAbstractFileEngine::IteratorUniquePtr, that can be used to iterate over the entries in path, using filters for entry filtering and filterNames for name filtering.

This function is called by QDirListing to initiate directory iteration.

See also: QDirListing

Reimplemented from QAbstractFileEngine.

Definition at line 214 of file qqmlpreviewfileengine.cpp.

References filters.

◆ caseSensitive()

bool QQmlPreviewFileEngine::caseSensitive ( ) const

overridevirtual

Should return true if the underlying file system is case-sensitive; otherwise return false.

Reimplemented from QAbstractFileEngine.

Definition at line 295 of file qqmlpreviewfileengine.cpp.

◆ close()

bool QQmlPreviewFileEngine::close ( )

overridevirtual

Closes the file, returning true if successful; otherwise returns false.

The default implementation always returns false.

Reimplemented from QAbstractFileEngine.

Definition at line 116 of file qqmlpreviewfileengine.cpp.

References QBuffer::close(), QQmlPreviewFileLoader::Directory, QQmlPreviewFileLoader::Fallback, and QQmlPreviewFileLoader::File.

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◆ copy()

bool QQmlPreviewFileEngine::copy ( const QString & newName )

overridevirtual

Copies the contents of this file to a file with the name newName.

Returns true on success; otherwise, false is returned.

Reimplemented from QAbstractFileEngine.

Definition at line 247 of file qqmlpreviewfileengine.cpp.

◆ endEntryList()

QAbstractFileEngine::IteratorUniquePtr QQmlPreviewFileEngine::endEntryList ( )

overridevirtual

Reimplemented from QAbstractFileEngine.

Definition at line 222 of file qqmlpreviewfileengine.cpp.

◆ entryList()

QStringList QQmlPreviewFileEngine::entryList	(	QDir::Filters	filters,
		const QStringList &	filterNames ) const

overridevirtual

Requests that a list of all the files matching the filters list based on the filterNames in the file engine's directory are returned.

Should return an empty list if the file engine refers to a file rather than a directory, or if the directory is unreadable or does not exist or if nothing matches the specifications.

See also: setFileName()

Reimplemented from QAbstractFileEngine.

Definition at line 305 of file qqmlpreviewfileengine.cpp.

References QAbstractFileEngine::entryList(), and filters.

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◆ extension()

bool QQmlPreviewFileEngine::extension	(	Extension	extension,
		const ExtensionOption *	option,
		ExtensionReturn *	output )

overridevirtual

Since: 4.3

This virtual function can be reimplemented in a QAbstractFileEngine subclass to provide support for extensions. The option argument is provided as input to the extension, and this function can store output results in output.

The behavior of this function is determined by extension; see the Extension documentation for details.

You can call supportsExtension() to check if an extension is supported by the file engine.

By default, no extensions are supported, and this function returns false.

See also: supportsExtension(), Extension

Reimplemented from QAbstractFileEngine.

Definition at line 349 of file qqmlpreviewfileengine.cpp.

References extension(), and output.

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◆ fileFlags()

QAbstractFileEngine::FileFlags QQmlPreviewFileEngine::fileFlags ( FileFlags type ) const

overridevirtual

This function should return the set of OR'd flags that are true for the file engine's file, and that are in the type's OR'd members.

In your reimplementation you can use the type argument as an optimization hint and only return the OR'd set of members that are true and that match those in type; in other words you can ignore any members not mentioned in type, thus avoiding some potentially expensive lookups or system calls.

See also: setFileName()

Reimplemented from QAbstractFileEngine.

Definition at line 151 of file qqmlpreviewfileengine.cpp.

References QQmlPreviewFileLoader::Directory, QAbstractFileEngine::DirectoryType, QAbstractFileEngine::ExistsFlag, QAbstractFileEngine::FileType, QAbstractFileEngine::FlagsMask, isRootPath(), QAbstractFileEngine::PermsMask, QAbstractFileEngine::ReadGroupPerm, QAbstractFileEngine::ReadOtherPerm, QAbstractFileEngine::ReadOwnerPerm, QAbstractFileEngine::ReadUserPerm, ret, QAbstractFileEngine::RootFlag, and QAbstractFileEngine::TypesMask.

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◆ fileName()

QString QQmlPreviewFileEngine::fileName ( QAbstractFileEngine::FileName file ) const

overridevirtual

Return the file engine's current file name in the format specified by file.

If you don't handle some FileName possibilities, return the file name set in setFileName() when an unhandled format is requested.

See also: setFileName(), FileName

Reimplemented from QAbstractFileEngine.

Definition at line 180 of file qqmlpreviewfileengine.cpp.

References QAbstractFileEngine::AbsolutePathName, QAbstractFileEngine::BaseName, QAbstractFileEngine::CanonicalName, QAbstractFileEngine::CanonicalPathName, file, QString::lastIndexOf(), QString::left(), QString::mid(), and QAbstractFileEngine::PathName.

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◆ fileTime()

QDateTime QQmlPreviewFileEngine::fileTime ( QFile::FileTime time ) const

overridevirtual

If time is BirthTime, return when the file was born (created).

If time is MetadataChangeTime, return when the file's metadata was last changed. If time is ModificationTime, return when the file was most recently modified. If time is AccessTime, return when the file was most recently accessed (e.g. read or written). If the time cannot be determined return QDateTime() (an invalid date time).

See also: setFileName(), QDateTime, QDateTime::isValid(), FileTime

Reimplemented from QAbstractFileEngine.

Definition at line 327 of file qqmlpreviewfileengine.cpp.

References QDateTime::currentDateTime(), and time.

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◆ flush()

bool QQmlPreviewFileEngine::flush ( )

overridevirtual

Flushes the open file, returning true if successful; otherwise returns false.

The default implementation always returns false.

Reimplemented from QAbstractFileEngine.

Definition at line 227 of file qqmlpreviewfileengine.cpp.

◆ handle()

int QQmlPreviewFileEngine::handle ( ) const

overridevirtual

Returns the native file handle for this file engine.

This handle must be used with care; its value and type are platform specific, and using it will most likely lead to non-portable code.

Reimplemented from QAbstractFileEngine.

Definition at line 334 of file qqmlpreviewfileengine.cpp.

◆ id()

QByteArray QQmlPreviewFileEngine::id ( ) const

overridevirtual

Since: 5.9

Return an identifier that (hopefully) uniquely identifies this file in the system. Returns an invalid QByteArray() if that cannot be calculated.

Reimplemented from QAbstractFileEngine.

Definition at line 317 of file qqmlpreviewfileengine.cpp.

References QByteArray().

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◆ isRelativePath()

bool QQmlPreviewFileEngine::isRelativePath ( ) const

overridevirtual

Return true if the file referred to by this file engine has a relative path; otherwise return false.

See also: setFileName()

Reimplemented from QAbstractFileEngine.

Definition at line 300 of file qqmlpreviewfileengine.cpp.

References isRelative().

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◆ isSequential()

bool QQmlPreviewFileEngine::isSequential ( ) const

overridevirtual

Returns true if the file is a sequential access device; returns false if the file is a direct access device.

Operations involving size() and seek(qint64) are not valid on sequential devices.

Reimplemented from QAbstractFileEngine.

Definition at line 237 of file qqmlpreviewfileengine.cpp.

References QIODevice::isSequential().

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◆ link()

bool QQmlPreviewFileEngine::link ( const QString & newName )

overridevirtual

Creates a link from the file currently specified by fileName() to 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.

Reimplemented from QAbstractFileEngine.

Definition at line 262 of file qqmlpreviewfileengine.cpp.

◆ mkdir()

bool QQmlPreviewFileEngine::mkdir	(	const QString &	dirName,
		bool	createParentDirectories,
		std::optional< QFile::Permissions >	permissions = std::nullopt ) const

overridevirtual

Requests that the directory dirName be created with the specified permissions.

If createParentDirectories is true, then any sub-directories in dirName that don't exist must be created. If createParentDirectories is false then any sub-directories in dirName must already exist for the function to succeed. If the operation succeeds return true; otherwise return false.

If permissions is null then implementation-specific default permissions are used.

See also: setFileName(), rmdir(), isRelativePath()

Reimplemented from QAbstractFileEngine.

Definition at line 267 of file qqmlpreviewfileengine.cpp.

◆ open()

bool QQmlPreviewFileEngine::open	(	QIODevice::OpenMode	openMode,
		std::optional< QFile::Permissions >	permissions )

overridevirtual

Opens the file in the specified mode.

Returns true if the file was successfully opened; otherwise returns false.

The mode is an OR combination of QIODevice::OpenMode and QIODevice::HandlingMode values.

If the file is created as a result of this call, its permissions are set according to permissision. Null value means an implementation- specific default.

Reimplemented from QAbstractFileEngine.

Definition at line 101 of file qqmlpreviewfileengine.cpp.

References QQmlPreviewFileLoader::Directory, QQmlPreviewFileLoader::Fallback, QQmlPreviewFileLoader::File, and QBuffer::open().

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◆ owner()

QString QQmlPreviewFileEngine::owner ( FileOwner owner ) const

overridevirtual

If owner is OwnerUser return the name of the user who owns the file.

If owner is OwnerGroup return the name of the group that own the file. If you can't determine the owner return QString().

See also: ownerId(), setFileName(), FileOwner

Reimplemented from QAbstractFileEngine.

Definition at line 322 of file qqmlpreviewfileengine.cpp.

References owner().

Referenced by owner(), and ownerId().

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◆ ownerId()

uint QQmlPreviewFileEngine::ownerId ( QAbstractFileEngine::FileOwner owner ) const

overridevirtual

If owner is OwnerUser return the ID of the user who owns the file.

If owner is OwnerGroup return the ID of the group that own the file. If you can't determine the owner return -2.

See also: owner(), setFileName(), FileOwner

Reimplemented from QAbstractFileEngine.

Definition at line 209 of file qqmlpreviewfileengine.cpp.

References owner().

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◆ pos()

qint64 QQmlPreviewFileEngine::pos ( ) const

overridevirtual

Returns the current file position.

This is the position of the data read/write head of the file.

Reimplemented from QAbstractFileEngine.

Definition at line 136 of file qqmlpreviewfileengine.cpp.

References QBuffer::pos().

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◆ read()

qint64 QQmlPreviewFileEngine::read	(	char *	data,
		qint64	maxlen )

overridevirtual

Reads a number of characters from the file into data.

At most maxlen characters will be read.

Returns -1 if a fatal error occurs, or 0 if there are no bytes to read.

Reimplemented from QAbstractFileEngine.

Definition at line 146 of file qqmlpreviewfileengine.cpp.

References QIODevice::read().

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◆ readLine()

qint64 QQmlPreviewFileEngine::readLine	(	char *	data,
		qint64	maxlen )

overridevirtual

This function reads one line, terminated by a '\n' character, from the file info data.

At most maxlen characters will be read. The end-of-line character is included.

Reimplemented from QAbstractFileEngine.

Definition at line 339 of file qqmlpreviewfileengine.cpp.

References QIODevice::readLine().

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◆ remove()

bool QQmlPreviewFileEngine::remove ( )

overridevirtual

Requests that the file is deleted from the file system.

If the operation succeeds return true; otherwise return false.

See also: setFileName(), rmdir()

Reimplemented from QAbstractFileEngine.

Definition at line 242 of file qqmlpreviewfileengine.cpp.

◆ rename()

bool QQmlPreviewFileEngine::rename ( const QString & newName )

overridevirtual

Requests that the file be renamed to newName in the file system.

If the operation succeeds return true; otherwise return false.

See also: setFileName()

Reimplemented from QAbstractFileEngine.

Definition at line 252 of file qqmlpreviewfileengine.cpp.

◆ renameOverwrite()

bool QQmlPreviewFileEngine::renameOverwrite ( const QString & newName )

overridevirtual

Since: 5.1

Requests that the file be renamed to newName in the file system. If the new name already exists, it must be overwritten. If the operation succeeds, returns true; otherwise returns false.

See also: setFileName()

Reimplemented from QAbstractFileEngine.

Definition at line 257 of file qqmlpreviewfileengine.cpp.

◆ rmdir()

bool QQmlPreviewFileEngine::rmdir	(	const QString &	dirName,
		bool	recurseParentDirectories ) const

overridevirtual

Requests that the directory dirName is deleted from the file system.

When recurseParentDirectories is true, then any empty parent-directories in dirName must also be deleted. If recurseParentDirectories is false, only the dirName leaf-node should be deleted. In most file systems a directory cannot be deleted using this function if it is non-empty. If the operation succeeds return true; otherwise return false.

See also: setFileName(), remove(), mkdir(), isRelativePath()

Reimplemented from QAbstractFileEngine.

Definition at line 273 of file qqmlpreviewfileengine.cpp.

◆ seek()

bool QQmlPreviewFileEngine::seek ( qint64 offset )

overridevirtual

Sets the file position to the given offset.

Returns true if the position was successfully set; otherwise returns false.

The offset is from the beginning of the file, unless the file is sequential.

See also: isSequential()

Reimplemented from QAbstractFileEngine.

Definition at line 141 of file qqmlpreviewfileengine.cpp.

References QBuffer::seek().

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◆ setFileName()

void QQmlPreviewFileEngine::setFileName ( const QString & file )

overridevirtual

Sets the file engine's file name to file.

This file name is the file that the rest of the virtual functions will operate on.

See also: rename()

Reimplemented from QAbstractFileEngine.

Definition at line 90 of file qqmlpreviewfileengine.cpp.

References absolutePath(), QBuffer::close(), file, QByteArray(), and QBuffer::setData().

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◆ setPermissions()

bool QQmlPreviewFileEngine::setPermissions ( uint perms )

overridevirtual

Requests that the file's permissions be set to perms.

The argument perms will be set to the OR-ed together combination of QAbstractFileEngine::FileInfo, with only the QAbstractFileEngine::PermsMask being honored. If the operations succceeds return true; otherwise return false;

See also: size()

Reimplemented from QAbstractFileEngine.

Definition at line 312 of file qqmlpreviewfileengine.cpp.

◆ setSize()

bool QQmlPreviewFileEngine::setSize ( qint64 size )

overridevirtual

Requests that the file be set to size size.

If size is larger than the current file then it is filled with 0's, if smaller it is simply truncated. If the operations succceeds return true; otherwise return false;

See also: size()

Reimplemented from QAbstractFileEngine.

Definition at line 278 of file qqmlpreviewfileengine.cpp.

References QBuffer::buffer(), QQmlPreviewFileLoader::Directory, QQmlPreviewFileLoader::Fallback, QQmlPreviewFileLoader::File, and QByteArray::resize().

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◆ size()

qint64 QQmlPreviewFileEngine::size ( ) const

overridevirtual

Returns the size of the file.

Reimplemented from QAbstractFileEngine.

Definition at line 131 of file qqmlpreviewfileengine.cpp.

References QBuffer::size().

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◆ supportsExtension()

bool QQmlPreviewFileEngine::supportsExtension ( Extension extension ) const

overridevirtual

Since: 4.3

This virtual function returns true if the file engine supports extension; otherwise, false is returned. By default, no extensions are supported.

See also: extension()

Reimplemented from QAbstractFileEngine.

Definition at line 354 of file qqmlpreviewfileengine.cpp.

References extension().

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◆ syncToDisk()

bool QQmlPreviewFileEngine::syncToDisk ( )

overridevirtual

Since: 5.1

Flushes and syncs the file to disk.

Returns true if successful; otherwise returns false. The default implementation always returns false.

Reimplemented from QAbstractFileEngine.

Definition at line 232 of file qqmlpreviewfileengine.cpp.

◆ write()

qint64 QQmlPreviewFileEngine::write	(	const char *	data,
		qint64	len )

overridevirtual

Writes len bytes from data to the file.

Returns the number of characters written on success; otherwise returns -1.

Reimplemented from QAbstractFileEngine.

Definition at line 344 of file qqmlpreviewfileengine.cpp.

References QIODevice::write().

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The documentation for this class was generated from the following files:

qtdeclarative/src/plugins/qmltooling/qmldbg_preview/qqmlpreviewfileengine.h (18a6e9277b10f7feb47fc7384761e7f724478227)
qtdeclarative/src/plugins/qmltooling/qmldbg_preview/qqmlpreviewfileengine.cpp (7ff6ebb7bdf0f8ceaad50948ceda50e728b5b9cd)

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QQmlPreviewFileEngine()

Member Function Documentation

◆ beginEntryList()

◆ caseSensitive()

◆ close()

◆ copy()

◆ endEntryList()

◆ entryList()

◆ extension()

◆ fileFlags()

◆ fileName()

◆ fileTime()

◆ flush()

◆ handle()

◆ id()

◆ isRelativePath()

◆ isSequential()

◆ link()

◆ mkdir()

◆ open()

◆ owner()

◆ ownerId()

◆ pos()

◆ read()

◆ readLine()

◆ remove()

◆ rename()

◆ renameOverwrite()

◆ rmdir()

◆ seek()

◆ setFileName()

◆ setPermissions()

◆ setSize()

◆ size()

◆ supportsExtension()

◆ syncToDisk()

◆ write()