The QChronoTimer class provides repetitive and single-shot timers.| doc.qt.io
The QScreen class is used to query screen properties.| doc.qt.io
The QSize class defines the size of a two-dimensional object using integer point precision.| doc.qt.io
The QRect class defines a rectangle in the plane using integer precision.| doc.qt.io
The QSizeF class defines the size of a two-dimensional object using floating point precision.| doc.qt.io
The header file includes Qt fundamental type declarations.| doc.qt.io
The Qt namespace contains miscellaneous identifiers used throughout the Qt library.| doc.qt.io
The QWindow class represents a window in the underlying windowing system.| doc.qt.io
The QString class provides a Unicode character string.| doc.qt.io
The QGuiApplication class manages the GUI application's control flow and main settings.| doc.qt.io