main.qml

import QtQuick 2.9
import QtQuick.Window 2.2
import QtQuick.Controls 2.5

Window {
    visible: true
    width: Screen.desktopAvailableWidth
    height: Screen.desktopAvailableHeight
    flags: Qt.FramelessWindowHint
    color: "#666666"
    title: qsTr("Mini Mátrix")
    Button {
        width: Screen.desktopAvailableWidth * 0.75
        height: Screen.desktopAvailableHeight * 0.15
        anchors {horizontalCenter: parent.horizontalCenter; top: parent.top; topMargin: parent.height*0.2}
    }
}