The QMetaObject class contains meta-information about Qt objects.| 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 QThread class provides a platform-independent way to manage threads.| doc.qt.io
The Qt namespace contains miscellaneous identifiers used throughout the Qt library.| doc.qt.io
The QList class is a template class that provides a dynamic array.| doc.qt.io
An overview of Qt's signals and slots inter-object communication mechanism. Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks. Signals and slots are made possible by Qt's meta-object system.| doc.qt.io