import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Layouts 1.12

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    RowLayout{
        id: layout
        anchors.fill: parent

        Rectangle{
            color: "red"

            Layout.minimumWidth: 100
            Layout.minimumHeight: 100
        }

        Rectangle{
            color: "green"

            Layout.minimumWidth: 100
            Layout.minimumHeight: 100
        }

        Rectangle{
            color: "blue"

            Layout.minimumWidth: 100
            Layout.minimumHeight: 100
        }
    }
}