Detailed Description
The QTemporaryFile class is an I/O device that operates on temporary files.
QTemporaryFile is an I/O device that will get its input/output from the local disk. The filename for the temporary file will be guaranteed to be unique once the file is opened and will subsequently be removed upon destruction of the QTemporaryFile object.
A temporary file will have some static part of the name and some part that is calculated to be unique. The default filename qt_temp will be placed into the temporary path as returned by QDir::tempPath().
See also QDir::tempPath() and QFile.
Member Function Documentation
QTemporaryFile::QTemporaryFile ()
Constructs a QTemporaryFile with no name.
See also setFileTemplate().
QTemporaryFile::QTemporaryFile ( const QString & templateName )
Constructs a QTemporaryFile with a template filename of templateName. Upon opening the temporary file this will be used to create a unique filename. If the templateName does end in XXXXXX it will automatically be appended and used as the dynamic portion of the filename.
See also open() and fileTemplate().
QTemporaryFile::QTemporaryFile ( QObject * parent )
Constructs a QTemporaryFile with the given parent, but with no name.
See also setFileTemplate().
QTemporaryFile::QTemporaryFile ( const QString & templateName, QObject * parent )
Constructs a QTemporaryFile with a template filename of templateName and the specified parent. Upon opening the temporary file this will be used to create a unique filename. If the templateName does end in XXXXXX it will automatically be appended and used as the dynamic portion of the filename.
See also open() and fileTemplate().
QTemporaryFile::~QTemporaryFile ()
Destroys the temporary file object, the file is automatically closed if necessary and if in auto remove mode it will automatically delete the file.
See also autoRemove().
bool QTemporaryFile::autoRemove () const
Returns true if the QTemporaryFile is in auto remove mode. Auto-remove mode will automatically delete the filename from disk upon destruction. This makes it very easy to create your QTemporaryFile object on the stack, fill it with data, read from it, and finally on function return it will automatically clean up after itself.
Auto-remove is on by default.
See also setAutoRemove() and remove().
QTemporaryFile * QTemporaryFile::createLocalFile ( QFile & file ) [static]
Creates and returns a local temporary file whose contents are a copy of the contents of the given file.
QTemporaryFile * QTemporaryFile::createLocalFile ( const QString & fileName ) [static]
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Works on the given fileName rather than an existing QFile object.
QString QTemporaryFile::fileName () const
Returns the complete unique filename backing the QTemporaryFile object. This string is null before the QTemporaryFile is opened, afterwards it will contain the fileTemplate() plus additional characters to make it unique.
See also fileTemplate().
QString QTemporaryFile::fileTemplate () const
Returns the set file template. The default file template will be called qt_temp and be placed in QDir::tempPath().
See also setFileTemplate().
bool QTemporaryFile::open ()
A QTemporaryFile will always be opened in QIODevice::ReadWrite mode, this allows easy access to the data in the file. This function will return true upon success and will set the fileName() to the unique filename used.
See also fileName().
void QTemporaryFile::setAutoRemove ( bool b )
Sets the QTemporaryFile into auto-remove mode if b is true.
Auto-remove is on by default.
See also autoRemove() and remove().
void QTemporaryFile::setFileTemplate ( const QString & name )
Sets the static portion of the file name to name. If the file template ends in XXXXXX that will automatically be replaced with the unique part of the filename, otherwise a filename will be determined automatically based on the static portion specified.
See also fileTemplate().
