C++ GUI Programming with Qt 4

12. Input/Output

• Reading and Writing Binary Data
• Reading and Writing Text
• Traversing Directories
• Embedding Resources
• Inter-Process Communication

The need to read from or write to files or other devices is common to almost every application. Qt provides excellent support for I/O through QIODevice, a powerful abstraction that encapsulates “devices” capable of reading and writing blocks of bytes. Qt includes the following QIODevice subclasses:

QProcess, QTcpSocket, QUdpSocket, and QSslSocket are sequential devices, meaning that the data can be accessed ...