I'm preparing a speech with the qml-presentation-system.
On one slide I have add a SlideSwitch.
The SlideSwitch appears as expected but I can't move the handle.

It seems that the MouseArea works perfect and receives the mouse click.
But the drag is not working.
The code below is working perfectly when I use qmlscene but integrated in the qml-presentation-system it is not working.
Any ideas?

@import QtQuick 2.0

/**
This item provides a secure slideswitch. A SlideSwitch is a switch that can
not be pressed accidentally. The user has to slide to knob to the other side
to toggle.
*/
Item {
id: slideswitch
property alias on: button.on
signal toggled(bool on)

Rectangle {
    id: background
    property bool hover: false
    color: "#2d2d2d"
    border.width: 4
    border.color: "white"
    radius: 8
    width: parent.width
    height: parent.height

    anchors.fill: parent
}

Rectangle {
    id: button
    property bool on: false

    height: background.height - 2*background.border.width
    width: (background.width / 2)-10
    color: button.on ? "grey" : "#2d2d2d"
    border.width: background.border.width
    border.color: "white"
    radius: 4
    x:background.border.width
    y:background.border.width

    Text
    {
        id: label
        anchors.fill: parent
        text: button.on ? "DSP" : "ARM"
        font.family: "OpenSymbol"
        font.pixelSize: 27
        font.bold: true
        color: button.on ? "#2d2d2d" : "grey"
        horizontalAlignment: Text.AlignHCenter
        verticalAlignment:  Text.AlignVCenter
    }

    MouseArea {
        id: bla
        anchors.fill: parent
        drag.target: parent
        drag.axis: Drag.XAxis
        drag.minimumX: background.border.width
        drag.maximumX: background.width - button.width - background.border.width

        onReleased: {
            console.log("Greatings from below. ButtonX: "+button.x+"drag.max: "+drag.maximumX)

            if(button.x > ((drag.maximumX) / 2)) {
                slideswitch.state = ""
                slideswitch.state = "on"
                toggled(true)
            }
            else {
                slideswitch.state = ""
                slideswitch.state = "off"
                toggled(false)
            }
        }
    }
}

// using states to differentiate between "on" and "off"
states: [
    State {
        name: "on"
        PropertyChanges {
            target: button
            x: background.width - button.width - background.border.width
            on: true
        }
    },
    State {
        name: "off"
        PropertyChanges {
            target: button
            x: background.border.width
            on: false
        }
    }
]

transitions: Transition {
    NumberAnimation {
        properties: "x"
        duration: 400
        easing.type: Easing.OutQuad
    }
}

}@