Selecting graph sections using chart cursor

HTML

<!-- Styles -->
<style>
#chartdiv {
	width	: 100%;
	height	: 500px;
}
										
</style>

<!-- Resources -->
<script src="http://rzv/assets/js/jquery.min.js"></script>


<script src="https://www.amcharts.com/lib/3/amcharts.js"></script>
<script src="https://www.amcharts.com/lib/3/serial.js"></script>
<script src="https://www.amcharts.com/lib/3/plugins/export/export.min.js"></script>
<link rel="stylesheet" href="https://www.amcharts.com/lib/3/plugins/export/export.css" type="text/css" media="all" />
<script src="https://www.amcharts.com/lib/3/themes/light.js"></script>

<!-- Chart code -->
<script>
    var chartData = [];
var chart = AmCharts.makeChart("chartdiv", {
    "type": "serial",
    "theme": "light",
    "sequencedAnimation": false,
    "startDuration": 0,
    "startEffect": "easeOutSine",
    "backgroundColor": "#2f4f8e",
    "backgroundAlpha": "0.00",
    "marginRight": 20,
    "marginLeft": 20,
    "trendLines": [],
    "graphs": [],
    "autoMarginOffset": 20,
    "synchronizeGrid":true,
    "mouseWheelZoomEnabled":true,
    "dataProvider": chartData,
    "legend": { // под графиком селекты
        "generateFromData": true,
        //"useGraphSettings": true,
        "markerSize": 20,
        "valueWidth": 50,
        // "valueWidth":100, // ширина селекта
        "verticalGap": 10, // отступ от графика (график сам уменьшается!)
        // "horizontalGap": 10,
        "maxColumns": 12, // максимальное кол-во колонок в длину
        // "valueText": " - [[value]]°C",
        "position": "bottom", // сверху размещаем, bottom - снизу

    },
    "balloon": {
        "borderThickness": 1.1,
        "shadowAlpha": 0.3,
        "animationDuration": 0,
        "disableMouseEvents": false,
        "fadeOutDuration": 0,
        "offsetX": 1,
        "offsetY": 6,
        "showBullet": true
    },
    "valueAxes": [
    {
        "axisAlpha": 0,
        "position": "left",
        "ignoreAxisWidth":true,
        "title": "температура, °C"
    },
    {
       ...

CSS

#chartdiv {
	width		: 100%;
	height		: 500px;
	font-size	: 11px;
}

JavaScript

chart.addListener("init", function (event) {
    chart.chartCursor.addListener("onShowCursor", function (event) {
    
        console.log(event);
        
    });
});