oboy/qt/main.qml

import QtQuick 2.5
import QtQuick.Controls 1.4
import QtQuick.Dialogs 1.2

ApplicationWindow {
    id: root
    visible: true
    width: 256
    height: 128
    title: qsTr("OBoy")

    menuBar: MenuBar {
        Menu {
            title: qsTr("File")
            MenuItem {
                text: qsTr("&Open")
                onTriggered: console.log("Open action triggered");
            }
            MenuItem {
                text: qsTr("Exit")
                onTriggered: Qt.quit();
            }
        }

        Menu {
            title: qsTr("View")
            MenuItem {
                text: qsTr("Background maps")
                onTriggered: {
                    console.log("Background maps");
                    var component = Qt.createComponent("BackgroundMap.qml")
                    var bgMap = component.createObject(root)
                    bgMap.show()
                }
            }
        }

    }

    MainForm {
        anchors.fill: parent
        button1.onClicked: messageDialog.show(qsTr("Button 1 pressed"))
        button2.onClicked: messageDialog.show(qsTr("Button 2 pressed"))
    }

    MessageDialog {
        id: messageDialog
        title: qsTr("May I have your attention, please?")

        function show(caption) {
            messageDialog.text = caption;
            messageDialog.open();
        }
    }

}