import QtQuick 2.9
import QtQuick.Controls 2.2
import QtQuick.Window 2.3

Window {
    visible: true
    width: 640
    height: 480

    Component.onCompleted: showMaximized()

    Button {
        anchors.centerIn: parent
        onClicked: {
            showMinimized()
            // visibility = Window.Minimized
        }
    }
}