QML Camera, focus on a custom point

luca

Hi all,
I need to focus a specific point in the display when capturing image with smartphone camera.
The code I'm using is:

Camera {
        id: camera
    
        focus {
            focusMode: Camera.FocusAuto
            focusPointMode: Camera.FocusPointCustom
        }
    }

    VideoOutput {
        id: videoView
        anchors.fill: parent
        fillMode: Image.PreserveAspectCrop
        source: camera
        autoOrientation: true
        MouseArea {
            anchors.fill: parent
            onClicked: {
                var point_x = mouse.x / Screen.width
                var point_y = mouse.y / Screen.height
                camera.focus.customFocusPoint = Qt.point(point_x, point_y)
                camera.searchAndLock()

            }
        }
    }

but every time I touch a point in the display it always focus on the center of the display. It seems to ignore the touched points.

Where do I wrong?

Thanks