Fixed point while dragging curve

How to set a fixed point on one of the endpoints of a curve, that is fixed while dragging so the shape of the curve changes? (-item1.y is the y-coordinate of the Item-id; this is a fixed number with normal rectangles)

Code:

---

Path {
        id: bendline
        startX: -146; startY: -12
        PathCurve { x: -138; y: -17 }
        PathCurve { x: -132; y: -25 }
        PathCurve { x: -130; y: -item1.y+365 }
        property color mycolor: "black"
    }
 
MouseArea {
        anchors.fill: parent
        onPositionChanged: {
            if (mouse.buttons & Qt.LeftButton) {
                bendline.x -= (x - mouse.x); bendline.y = -item1.y+365;
            }
        }
 
PathView {
            id: bendView;
            x: 10
            y: 20
            model: { item1.y >= 387 && item1.y < 459 ? 300 : 0 }
            path: bendline
            delegate: Rectangle {
                id: dot;
                width: 1; height: 1;
                color: bendline.mycolor
            }
        }

---

SOLVED, by myself.

Would be cool if you could post the solution, in case someone else encounters a similar problem and finds this thread :)

Cheers,
_