QPolygonF for non-intersecting subpaths

sDmt

Hi,
I am trying to make a QPolygonF from two non-intersecting subpaths. I added two paths but when I used united to group them they still connected.

QPainterPath path1;
        qreal Width =100;
        qreal Height = 50;
        path1.moveTo(QPointF(X,Y));
        path1.lineTo(QPointF(X + Width, Y ));
        path1.lineTo(QPointF(X + Width, Y + Height));
        path1.lineTo(QPointF(X , Y + Height));
        path1.closeSubpath();

        QPainterPath path2;
        path2.moveTo(QPointF(X + 1.2*Width, Y + 1.2*Height));
        path2.addRoundedRect(QRectF(X + 1.2*Width, Y + 1.2*Height,Width,Height),0.1*Width, 0.1*Height,Qt::AbsoluteSize);

        QPolygonF po1 = path1.toSubpathPolygons()[0];
        QPolygonF po2 = path2.toSubpathPolygons()[0];

        myPolygon = po2.united(po1);

this is what I get

As I understand toSubpathPolygons() and/or united should be used but I don't know how. Any idea, please.

Pl45m4

@sDmt

What kind of polygon do you expect? How it should look like?

sDmt

@Pl45m4 thanks for the reply.
I just need to get rid of the line connecting the two shapes. Also, I want to handle them as group such that when I drag one the other is dragged as well ans so on.

Pl45m4

@sDmt

It seems that united (adding two separate paths) connects the path1' s end point with the starting point of path2... This is the line, you can see there.

So I guess you cant use PainterPath to draw an item like this. Use a custom QGraphicsItem instead, where you add both rectangles or polygons to your painter and set a boundingRect that includes both of them.

QRectF MyItem::boundingRect() const
{
    return QRectF(-10, -10, 30, 30);
}


void MyItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
        painter->drawRoundedRect(-10, -10, 20, 20, 5, 5);
        painter->drawRoundedRect(10, 10, 5, 5, 5, 5);
}

sDmt

@Pl45m4 True, I see that QPainterPath is getting me nowhere in this case. Thanks.