javascript - Redrawing google chart -

hello guys developing web application google chart . want redraw chart on each times user makes selection , here code

    //loading google api     google.load("visualization", "1", {         packages: ["corechart"]     });     google.setonloadcallback(drawallcharts);           function drawallcharts() {         //sending server request         $.post("index.php", {             type: "result"         }, function (data, status) {             handleresponse(data, true)         });     }     //this function handles response of server json string      function handleresponse(jsonstring, init) {         //parsing json string object          var obj = json.parse(jsonstring);         var arraydata = objtostrin(obj); //converting obj array         console.log(arraydata);         drawdistchart(arraydata, init);     }     //this function draws first chart     function drawdistchart(arraydata, init) {         //preparing data         var datadistribution = new google.visualization.datatable();         datadistribution.addcolumn('string', "fitness");         datadistribution.addcolumn('number', "physical");         datadistribution.addcolumn('number', "emotional");         datadistribution.addrows(arraydata);         //setting few properties          var options = {             title: 'no of people',             backgroundcolor: {                 fill: 'transparent'             },             haxis: {                 title: 'wellness score',                 slantedtext: true,                 titletextstyle: {                     color: 'red'                 }             }         };         //drawing chart    var chart = new google.visualization.columnchart(document.getelementbyid('chart_div'));         chart.draw(datadistribution, options);             } 

but nothing happens , please help

you need add "select" event listener handle user selecting chart elements:

google.visualization.events.addlistener(chart, 'select', function () {     var selection = chart.getselection();     if (selection.length) {         // user clicked on chart element         // row/column information selection[n].row/column         // selection          // redraw chart         chart.draw(datadistribution, options);     } });