import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Controls 1.2
import QtMultimedia 5.4

ApplicationWindow {
    id: window

    property Window other

    visible: true
    width: 640
    height: 960

    MouseArea {
       anchors { fill: parent }
       onClicked: timer.running = !timer.running
    }

    Timer {
        id: timer
        repeat: true
        interval: 1500
        onTriggered: {
            if (!window.other) {
                window.other = test.createObject(null);
                return
            }

            if (window.other) {
                window.other.destroy()
                window.other = null
                gc()
            }
        }
    }

    Component {
        id: test
        Window { color: "red"; visible: true; width: 64; height: 96 }
    }
}