The QStandardPaths class provides methods for accessing standard paths.| doc.qt.io
The QFile class provides an interface for reading from and writing to files.| doc.qt.io
The QDir class provides access to directory structures and their contents.| doc.qt.io
The QFileDialog class provides a dialog that allows users to select files or directories.| doc.qt.io
The QPushButton widget provides a command button.| doc.qt.io
The QApplication class manages the GUI application's control flow and main settings.| doc.qt.io