Cura/LayerView.qml

import QtQuick 2.2
import QtQuick.Controls 1.2
import QtQuick.Layouts 1.1
import QtQuick.Controls.Styles 1.1

import UM 1.0 as UM

Item 
{
    width: 250
    height: 250
    /*Rectangle 
    {
        color: "blue"
        width: 250  
        height:250
    }*/
    Slider 
    {
        width: 10
        height: 250
        anchors.right : parent.right
        //anchors.fill: parent
        //Layout.preferredHeight: UM.Theme.sizes.section.height;
        orientation: Qt.Vertical
        minimumValue: 0;
        maximumValue: 100;

        value: 50;
        onValueChanged: UM.ActiveView.triggerAction("setLayer", value)

        style: UM.Theme.styles.slider;
        //Component.onCompleted: {console.log(UM.Theme.styles.slider)}
    }
}