nooLight/main.qml

import QtQuick 2.9
import QtQuick.Controls 2.2
import Qt.labs.settings 1.0

ApplicationWindow {
    id: window

    visible: true
    width: 640
    height: 480
    title: qsTr("Stack")

    Settings {
        id: settings

        property string serviceUrl: ""
    }

    header: ToolBar {
        contentHeight: 36

        MenuBackButton {
            id: menuButton

            anchors.verticalCenter: parent.verticalCenter
            anchors.left: parent.left
            anchors.leftMargin: 8

            width: 24
            height: 24

            state: stackView.depth > 1 ? "back" : "menu"

            onClicked: {
                drawer.open()
            }

            onBack: {
                stackView.pop()
            }
        }

        Label {
            text: stackView.currentItem.title
            anchors.centerIn: parent
        }
    }

    Drawer {
        id: drawer
        width: window.width * 0.66
        height: window.height

        Column {
            anchors.fill: parent

            ItemDelegate {
                text: qsTr("Settings")
                width: parent.width
                onClicked: {
                    if (stackView.depth > 1) {
                        stackView.pop()
                    }

                    stackView.push("SettingsForm.qml")
                    drawer.close()
                }
            }
        }
    }

    StackView {
        id: stackView
        initialItem: "HomeForm.qml"
        anchors.fill: parent
    }

    onClosing: {
        if (stackView.depth > 1) {
            close.accepted = false
            stackView.pop()
        }
    }
}