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Input/Output and Networking

These classes are used to handle input and output to and from external devices, processes, files etc. as well as manipulating files and directories.

QAbstractFileEngineThe QAbstractFileEngine class provides an abstraction for accessing the filesystem.
QAbstractFileEngineHandlerThe QAbstractFileEngineHandler class provides a way to register custom file engines with your application.
QAbstractSocketThe QAbstractSocket class provides the base functionality common to all socket types.
QAuthenticatorThe QAuthenticator class provides an authentication object.
QBufferThe QBuffer class provides a QIODevice interface for a QByteArray.
QClipboardThe QClipboard class provides access to the window system clipboard.
QDataStreamThe QDataStream class provides serialization of binary data to a QIODevice.
QDirThe QDir class provides access to directory structures and their contents.
QFileThe QFile class provides an interface for reading from and writing to files.
QFileInfoThe QFileInfo class provides system-independent file information.
QFileSystemWatcherThe QFileSystemWatcher class provides an interface for monitoring files and directories for modifications.
QFtpThe QFtp class provides an implementation of the client side of FTP protocol.
QHostAddressThe QHostAddress class provides an IP address.
QHostInfoThe QHostInfo class provides static functions for host name lookups.
QHttpThe QHttp class provides an implementation of the HTTP protocol.
QHttpHeaderThe QHttpHeader class contains header information for HTTP.
QHttpRequestHeaderThe QHttpRequestHeader class contains request header information for HTTP.
QHttpResponseHeaderThe QHttpResponseHeader class contains response header information for HTTP.
QIODeviceThe QIODevice class is the base interface class of all I/O devices in Qt.
QImageReaderThe QImageReader class provides a format independent interface for reading images from files or other devices.
QImageWriterThe QImageWriter class provides a format independent interface for writing images to files or other devices.
QMacPasteboardMimeThe QMacPasteboardMime class maps open-standard MIME to Mac flavors.
QNetworkAddressEntryThe QNetworkAddressEntry class stores one IP address supported by a network interface, along with its associated netmask and broadcast address.
QNetworkInterfaceThe QNetworkInterface class provides a listing of the host's IP addresses and network interfaces.
QNetworkProxyThe QNetworkProxy class provides a network layer proxy.
QPictureIOThe QPictureIO class contains parameters for loading and saving pictures.
QProcessThe QProcess class is used to start external programs and to communicate with them.
QResourceThe QResource class provides an interface for reading directly from resources.
QSettingsThe QSettings class provides persistent platform-independent application settings.
QSignalMapperThe QSignalMapper class bundles signals from identifiable senders.
QSocketNotifierThe QSocketNotifier class provides support for monitoring activity on a file descriptor.
QSslCertificateThe QSslCertificate class provides a convenient API for an X509 certificate.
QSslCipherThe QSslCipher class represents an SSL cryptographic cipher.
QSslErrorThe QSslError class provides an SSL error.
QSslKeyThe QSslKey class provides an interface for private and public keys.
QSslSocketThe QSslSocket class provides an SSL encrypted socket for both clients and servers.
QTcpServerThe QTcpServer class provides a TCP-based server.
QTcpSocketThe QTcpSocket class provides a TCP socket.
QTemporaryFileThe QTemporaryFile class is an I/O device that operates on temporary files.
QTextIStreamThe QTextIStream class is a convenience class for input streams.
QTextOStreamThe QTextOStream class is a convenience class for output streams.
QTextStreamThe QTextStream class provides a convenient interface for reading and writing text.
QUdpSocketThe QUdpSocket class provides a UDP socket.
QUrlThe QUrl class provides a convenient interface for working with URLs.
QUrlInfoThe QUrlInfo class stores information about URLs.
QWindowsMimeThe QWindowsMime class maps open-standard MIME to Window Clipboard formats.


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Qt 4.3.0beta