import QtQuick 2.15
import QtQuick.Window 2.15
import RenderItem 1.0

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

    RenderItem{
        id: renderItem
        width: 500; height: 500
    }
    Rectangle{
        id: renderRect
        color: "red"
        opacity: 0.2
        width: 500; height: 500
    }
    MouseArea{
        anchors.fill: parent
        onClicked: renderItem.update()
    }
}