QPainterPath from list of points

[Chris Kawa]

As mentioned above you can use QPainterPathStroker. The problem is it will create tiny loops on the inside of the joints, so you need to simplify the path afterwards.
Sample code:

QVector<QPoint> points { QPoint(30,30), QPoint(100, 100), QPoint(200,50) };

QPainterPath basePath;
basePath.addPolygon(QPolygon(points));

QPainterPathStroker str;
str.setCapStyle(Qt::RoundCap);
str.setWidth(10.0);

QPainterPath resultPath = str.createStroke(basePath).simplified();

[Joel Bodenmann]

Wow, I am deeply impressed. Using the code shown by @Chris-Kawa gave exactly the desired result:

Thank you very much for your help, guys. Very appreciated!

[mrjj]

well what can we say ?
Chris rules :)

[Joel Bodenmann]

@mrjj Well, thanks to you and @kshegunov too. You guys are amazing!