This is almost exactly the same as the "Analog Clock" (widget) example.
"Analog Clock Window Example" demonstrates:
* How to render to a QWindow (covered by RasterWindow example)
* QPainter and transformations (covered by Analog Clock example)
* How to use QTimer (covered by Analog Clock example)
Change-Id: I7f20a29798830ed6345eca250e4139cb314cab84
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
(cherry picked from commit f7db1cfa92896135534f6ab140d1470e56a5d677)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
1bfa58f11c