The QScreen class is used to query screen properties.| doc.qt.io
The QRectF class defines a finite rectangle in the plane using floating point precision.| doc.qt.io
The QSize class defines the size of a two-dimensional object using integer point precision.| doc.qt.io
The QSizeF class defines the size of a two-dimensional object using floating point precision.| doc.qt.io
The QAbstractTextDocumentLayout class is an abstract base class used to implement custom layouts for QTextDocuments.| doc.qt.io
The QTextDocument class holds formatted text.| doc.qt.io