The QMainWindow class provides a main application window.| doc.qt.io
The QToolBar class provides a movable panel that contains a set of controls.| doc.qt.io
The QPoint class defines a point in the plane using integer precision.| doc.qt.io
The QToolButton class provides a quick-access button to commands or options, usually used inside a QToolBar.| doc.qt.io
The QSize class defines the size of a two-dimensional object using integer point precision.| doc.qt.io
The QPaintEvent class contains event parameters for paint events.| doc.qt.io
The QWidget class is the base class of all user interface objects.| doc.qt.io
The QEvent class is the base class of all event classes. Event objects contain event parameters.| doc.qt.io
The QAction class provides an abstraction for user commands that can be added to different user interface components.| doc.qt.io
The Qt namespace contains miscellaneous identifiers used throughout the Qt library.| doc.qt.io
The QString class provides a Unicode character string.| doc.qt.io