An enumeration of pen stroke patterns.
Only the below enumerated patterns are currently supported, but if needed it is possible to implement arbitrary custom patterns. See the following page from the relevant Qt docs: http://doc.qt.io/qt-5.7/qt.html#PenStyle-enum
SOLID: —A solid line
DASH: —Dashes separated by blank space
DOT: —Small dots separated by blank space
DASHDOT: —Alternating dashes and dots
DASHDOTDOT: —A repeating pattern of one dash and two dots