Convert amCharts stock chart period selector into a dropdown - amcharts

Question

I am using amCharts stock chart to show trades within a period of time. I am using php and ajax to get values.
Now I do have period selector as buttons but I need them as a select. When a user selects a value from dropdown, the chart zoom should change accordingly. Is it possible to do that?
Below is my code to get a stock chart. Please help.
<div id="chartdiv" style="width:100%; height:400px;"></div>
<select id="mySelect" onchange="test()">
<option value="5">5
<option value="15">15
<option value="30">30
<option value="60">1H
<option value="D">1D
</select>
<script type="text/javascript">
AmCharts.addInitHandler(function (chart) {
}, ["stock"]);
var chartData = generateChartData();
console.log(chartData);
var chart = AmCharts.makeChart("chartdiv", {
"type": "stock",
"theme": "light",
"autoMarginOffset": 30,
"valueAxesSettings": {
"position": "right",
"inside": false,
"autoMargins": true,
"axisColor": "#000000",
"tickLength": 1
},
"categoryAxesSettings": {
"parseDates": true,
"minPeriod": "ss",
"axisColor": "#000000",
"tickLength": 1
},
"mouseWheelZoomEnabled": true,
"dataSets": [{
"fieldMappings": [{
"fromField": "open",
"toField": "open"
}, {
"fromField": "close",
"toField": "close"
}, {
"fromField": "high",
"toField": "high"
}, {
"fromField": "low",
"toField": "low"
}, {
"fromField": "volume",
"toField": "volume"
}],
"color": "#7f8da9",
"dataProvider": chartData,
"title": '<?php echo $symbol; ?>',
"categoryField": "date"
}
],
"panels": [{
"urlTarget": "_blank",
"showCategoryAxis": true,
"percentHeight": 70,
"valueAxes": [{
"dashLength": 5
}],
"categoryAxis": {
"dashLength": 5
},
"stockGraphs": [{
"id": "g1",
"type": "candlestick",
"proCandlesticks": false,
"balloonText": "Open:<b>[[open]]</b><br>Low:<b>[[low]]</b><br>High:<b>[[high]]</b><br>Close:<b>[[close]]</b><br>",
"openField": "open",
"closeField": "close",
"highField": "high",
"lowField": "low",
"lineAlpha": 1,
"lineColor": "#53b987",
"fillColors": "#53b987",
"fillAlphas": 0.9,
"negativeFillColors": "#eb4d5c",
"negativeLineColor": "#eb4d5c",
"useDataSetColors": false,
"title": "Volume:",
"valueField": "volume"
}],
"stockLegend": {
"valueTextRegular": undefined,
"periodValueTextComparing": "[[percents.value.close]]%"
}
}
],
"chartScrollbarSettings": {
"updateOnReleaseOnly": true,
"autoGridCount": true,
"graph": "g1",
"graphType": "line",
"scrollbarHeight": 30
},
"periodSelector": {
"position": "top",
"inputFieldsEnabled": false,
"periodsText": "",
"dateFormat": "YYYY-MM-DD JJ:NN",
"periods": [{
"period": "hh",
"count": 1,
"label": "5",
"selected": true
}, {
"period": "hh",
"count": 6,
"label": "15"
}, {
"period": "hh",
"count": 4,
"label": "30"
}, {
"period": "hh",
"count": 12,
"label": "1H"
}, {
"period": "dd",
"count": 60,
"label": "1D"
}]
},
"listeners": [
{
"event": "rendered",
"method": function (e) {
if (e.chart.ignoreResize) {
e.chart.ignoreResize = false;
return;
}
// init
var margins = {
"left": 0,
"right": 0
};
// iterate thorugh all of the panels
for (var p = 0; p < chart.panels.length; p++) {
var panel = chart.panels[p];
// iterate through all of the axis
for (var i = 0; i < panel.valueAxes.length; i++) {
var axis = panel.valueAxes[i];
if (axis.inside !== false) {
continue;
}
var axisWidth = axis.getBBox().width + 10;
if (axisWidth > margins[axis.position]) {
margins[axis.position] = axisWidth;
}
}
}
// set margins
if (margins.left || margins.right) {
chart.panelsSettings.marginLeft = margins.left;
chart.panelsSettings.marginRight = margins.right;
e.chart.ignoreResize = true;
chart.invalidateSize();
}
}
},
{
"event": "zoomed",
"method": function (e) {
e.chart.lastZoomed = e;
//console.log(e);
console.log("ignoring zoomed");
}
},
]
});
setInterval(function () {
//Setting the new data to the graph
chart.dataProvider = generateChartData();
chart.validateData();
}, 10000);
function test() {
var resolution = $("#mySelect").val();
//console.log(resolution);
var pp, count;
if (resolution == "D") {
resolution = "1D";
pp = 'dd';
count = 60;
}
else if (resolution == "60") {
resolution = "1H";
pp = 'hh';
count = 12;
}
else if (resolution == "30") {
pp = 'hh';
count = 4;
}
else if (resolution == "15") {
pp = 'hh';
count = 6;
}
else if (resolution == "5") {
pp = 'hh';
count = 1;
}
else {
pp = 'hh';
}
//console.log(pp);
for (var x in chart.periodSelector.periods) {
var period = chart.periodSelector.periods[x];
if (pp == period.period && resolution == period.count) {
period.selected = true;
}
else {
period.selected = false;
}
}
// console.log(period.period);
chart.periodSelector.setDefaultPeriod();
}
</script>