How to get points drawn by strokePath from outline of QPainterPath

[Uwe]

Uwe, you didn't get the point of this all... because you did not read my first post carefully.

Well, there is QPainterPathStroker that is also internally used to create the QPainterPath that gets finally rendered.
So what you need to do is to set up the stroker with the attributes of your pen and then the strokedPath can be read like in my previous posting.

Thought you were talking about the strokedPath in your initial posting as you called it like that.

Uwe

[userman]

So the (other) final solution is:

Draw along outline points of shape:
qt-quest1.1.jpg

QPainterPath path(QPointF(80, 320));
path.lineTo(QPointF(240,90));
path.lineTo(QPointF(330,240));
path.lineTo(QPointF(620,180));
path.lineTo(QPointF(730,110));
 
QPainterPathStroker stroker;
stroker.setCapStyle(Qt::RoundCap);
stroker.setJoinStyle(Qt::RoundJoin);
stroker.setWidth(100);
 
QPainterPath strokePath = stroker.createStroke(path).simplified();
 
for (int i = 0; i < strokePath.elementCount()-1; i++)
{
  QPainterPath::Element p1 = strokePath.elementAt(i);
  QPainterPath::Element p2 = strokePath.elementAt(i+1);
  painter->setPen(QPen(i % 2 == 0 ? Qt::red : Qt::green, 1));
  painter->drawLine(QPointF(p1.x, p1.y), QPointF(p2.x, p2.y));
}

QPainterPath path(QPointF(80, 320));
path.lineTo(QPointF(240,90));
path.lineTo(QPointF(330,240));
path.lineTo(QPointF(620,180));
path.lineTo(QPointF(730,110));

QPainterPathStroker stroker;
stroker.setCapStyle(Qt::RoundCap);
stroker.setJoinStyle(Qt::RoundJoin);
stroker.setWidth(100);

QPainterPath strokePath = stroker.createStroke(path).simplified();

for (int i = 0; i < strokePath.elementCount()-1; i++)
{
  QPainterPath::Element p1 = strokePath.elementAt(i);
  QPainterPath::Element p2 = strokePath.elementAt(i+1);
  painter->setPen(QPen(i % 2 == 0 ? Qt::red : Qt::green, 1));
  painter->drawLine(QPointF(p1.x, p1.y), QPointF(p2.x, p2.y));
}

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Solved.