customize shadow effect form

Hi, I want to make a custom window and let it shadow effects
To do this I used the following code, but do not work

Code:

---

ApplicationWindow {
    id: win
    flags: Qt.FramelessWindowHint | Qt.NonModal
        DropShadow {
            anchors.fill: parent
            horizontalOffset: 3
            verticalOffset: 3
            radius: 8.0
            samples: 17
            color: "#80000000"
            source: parent
        }
}

---

You cannot paint outside the window thus the code above will not work. You need a window with translucent background and paint the shadow inside the window geometry. Try adding the translucent background flag to your window and maybe it will work.