Scroll using the mouse wheel in a horizontal ScrollView

I have a horizontal ScrollView with a ListView inside, and I want to scroll using the mouse wheel, but it seems not to work like it does in a vertical ScrollView.

Do I need to add some extra code in the horizontal ScrollView?

Thanks in advance,
Diego

My dummy code (with horizontal & vertical scrolls):

Code:

---

import QtQuick 2.0
import QtQuick.Controls 1.3
 
Item {
 
    height: 500
    width: 600
 
    ScrollView {
        anchors { left: parent.left; leftMargin: 50; verticalCenter: parent.verticalCenter}
        height: 50
        width: 300
 
        ListView {
 
            height: 50
            width: contentWidth
 
            orientation: Qt.Horizontal
            interactive: false
            clip: true
 
            model: appModel
 
            delegate: Rectangle {
                height: 50
                width: 50
                color: colorR
               // Text { anchors.centerIn: parent; text: colorR }
            }
        } // ListView
    }
 
    ScrollView {
        anchors { right: parent.right; rightMargin: 50; verticalCenter: parent.verticalCenter}
        height: 300
        width: 50
 
        ListView {
            height: contentHeight
            width: 50
 
            interactive: false
            clip: true
 
            model: appModel
 
            delegate: Rectangle {
                height: 50
                width: 50
                color: colorR
               // Text { anchors.centerIn: parent; text: colorR }
            }
        } // ListView
    }
 
    ListModel {
        id: appModel
 
        ListElement { colorR: "red"}
        ListElement { colorR: "green"}
        ListElement { colorR: "blue"}
        ListElement { colorR: "cyan"}
        ListElement { colorR: "yellow"}
        ListElement { colorR: "blue"}
        ListElement { colorR: "lightgray"}
        ListElement { colorR: "red"}
        ListElement { colorR: "green"}
        ListElement { colorR: "blue"}
        ListElement { colorR: "cyan"}
        ListElement { colorR: "yellow"; }
        ListElement { colorR: "lightgray"}
    }
}

---