ChartView {
            id:chartView
            title: "Haccp Data"
            theme: ChartView.ChartThemeDark
            backgroundColor: "black";
            width: parent.width;
            height: parent.height
            anchors.fill: parent
            antialiasing: true;
            visible: true
            legend.markerShape: Legend.MarkerShapeCircle

            ....
}