The QPen class defines how a QPainter should draw lines and outlines of shapes. ... QPen  ( const QColor & color, uint width=0, PenStyle style=SolidLine )  . ... uint  width  () const . ... A pen has a style, a width and a color. ... The pen width defines the line width. ... The pen color defines the color of lines and text. ... See the setStyle () function for a complete list of pen styles. ... Constructs a pen with a specified color, width and style. ... Sets the pen color to c. See also: color (). ...