The QMainWindow class provides a main application window.| 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 QSettings class provides persistent platform-independent application settings.| doc.qt.io
The QLineEdit widget is a one-line text editor.| doc.qt.io
A module which provides a set of C++ technologies for building user interfaces| doc.qt.io
The Qt GUI module provides classes for windowing system integration, event handling, OpenGL and OpenGL ES integration, 2D graphics, basic imaging, fonts, and text. These classes are used internally by Qt's user interface technologies but can also be used directly, for example to write applications using low-level OpenGL ES graphics APIs.| doc.qt.io
The QStyle class is an abstract base class that encapsulates the look and feel of a GUI.| doc.qt.io
The QWidget class is the base class of all user interface objects.| doc.qt.io
The QObject class is the base class of all Qt objects.| doc.qt.io
The QApplication class manages the GUI application's control flow and main settings.| doc.qt.io
The header file defines Qt logging types, functions and macros.| doc.qt.io
The QStringList class provides a list of strings.| doc.qt.io
The QString class provides a Unicode character string.| doc.qt.io
The QCoreApplication class provides an event loop for Qt applications without UI.| doc.qt.io