Develop Reference

Security Issue while using js amcharts with PHP

Using js amcharts with PHP, Found that source code and paths is accessible through charts. How to block it as this can be serious security issue. I am new to PHP, please elaborate the answer if possible. Thanks

PHP is a server side language amcharts.js runs on the client, meaning any data it receives must be accessible to the same client that is rendering the chart. You can't make data visible to the cart but invisible to the user, however if you want to limit what the user can see you can render the chart data as JSON in the containing html page (using json_encode) and then pass it as a variable to the charting library, such as:
<script>
var chart = AmCharts.makeChart("chartdiv", {
"type": "serial",
"theme": "light",
"marginRight": 70,
"startDuration": 1,
"graphs": [{
"balloonText": "<b>[[category]]: [[value]]</b>",
"fillColorsField": "color",
"fillAlphas": 0.9,
"lineAlpha": 0.2,
"type": "column",
"valueField": "visits"
}],
"chartCursor": {
"categoryBalloonEnabled": false,
"cursorAlpha": 0,
"zoomable": false
},
"categoryField": "country",
"categoryAxis": {
"gridPosition": "start",
"labelRotation": 45
},
"export": {
"enabled": true
}
"dataProvider": <%php echo json_encode($ResultsArray); %>
});
</script>
<!-- HTML -->
<div id="chartdiv"></div>

amCharts json data from mySql - Chart not displaying

Unable to get a pie chart to display using database data. My json looks good?
Sample Json
[{"id":1,"sport":"football","score":138.10,"entry":3.00,"winnings":8.00},{"id":2,"sport":"basketball","score":120.00,"entry":10.00,"winnings":20.00}]
I know the chart is connecting to the dataset, because I get a colored block with NaN as the label, with one block for each row in my database. See image. "entry" is a float in the Db and I've swapped it with another field that's an Int in the Db, as I was thinking that the float was coming back as Not A Number, but that doesn't look to be the case.
<script type="text/javascript">
AmCharts.makeChart("piechartdiv", {
"type": "pie",
"dataLoader": {
"url": "http://siteaddress.com/api/entries",
"format": "json",
"showErrors": "true"
},
"titlefield": "sport",
"valuefield": "entry",
"balloontext": "[[title]]<br><span style='font-size:14px'><b>[[value]]</b> ([[percents]]%)</span>",
"legend": {
"align": "center",
"markertype": "circle"
}
});
</script>
<div id="piechartwrapper">
<div id="piechartdiv" style="width: 100%" class="col-md-6 col-md-offset-0"></div>
</div>

Your fields are set up incorrectly - they're case sensitive. titleField, valueField, balloonText and markerType are camel-case. Your config has them all in lowercase.
Updated code below:
AmCharts.makeChart("piechartdiv", {
"type": "pie",
"dataLoader": {
"url": "http://siteaddress.com/api/entries",
"format": "json",
"showErrors": "true"
},
"titleField": "sport",
"valueField": "entry",
"balloonText": "[[title]]<br><span style='font-size:14px'><b>[[value]]</b> ([[percents]]%)</span>",
"legend": {
"align": "center",
"markerType": "circle"
}
});

TradingView widget replacing entire HTML body

Trying to add TradingView widget into my website.
This widget must load when user select an option from a dropdown.
Issue: The widget loads, but it replaces everything in the body and thereby the dropdown disappear.
Example:
HTML Code:
<select name="fx" class="fx">
<option value="EURUSD">EURUSD</option>
<option value="EURJPY">EURJPY</option>
</select>
JS:
function changeFX(fx){
var fxWidget = new TradingView.widget({
"width": 500,
"height": 400,
"symbol": "FX:"+fx,
"interval": "1",
"timezone": "Etc/UTC",
"theme": "White",
"style": "2",
"locale": "en",
"toolbar_bg": "#f1f3f6",
"hide_top_toolbar": true,
"save_image": false,
"hideideas": true
});
return themeWidget;
}
$(document).on('change','.fx',function(){
var widget = changeFX(this.value);
// do something with widget.
});
http://jsfiddle.net/livewirerules/3e9jaLku/5
(select dropdown option, and see widget loads but dropdown disappears)
Any advice how to make the dropdown doesn't disappear and still TradingView widget load?

It's certainly too late, but you can use the argument "container_id" to choose where to place the graph.
source : https://github.com/mmmy/css3demos/wiki/Widget-Constructor

So what i can make out from the widgets website. Whatever is happening is how it works. So for this to behave the way you want. You will have to use a iframe. in your index.html and create a separate file say chart.html and give the src of the iframe as chart.html. And on change even change the src of the frame with a query parameter and read that query parameter in your chart.html and create the chart. Below is the code for your reference.
index.html
<html>
<head>
<link rel="stylesheet" href="style.css">
<script src="https://code.jquery.com/jquery-git1.min.js"></script>
<script>
$(document).on('change','.fx',function(){
//var widget = changeFX(this.value);
document.getElementById('content').src = "chart.html?value="+this.value;
document.getElementById('content').style.display = "block";
});
</script>
<style>
iframe{
height:400px;
width:600px;
display:none;
}
</style>
</head>
<body>
<select name="fx" class="fx">
<option value="EURUSD">EURUSD</option>
<option value="EURJPY">EURJPY</option>
</select>
<iframe src="chart.html" id="content" >
</iframe>
</body>
</html>
chart.html
<html>
<head>
<script type="text/javascript" src="https://s3.tradingview.com/tv.js"></script>
<script>
function getParameterByName(name, url) {
if (!url) {
url = window.location.href;
}
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
var fx = getParameterByName('value');
var fxWidget = new TradingView.widget({
"width": 500,
"height": 400,
"symbol": "FX:"+fx,
"interval": "1",
"timezone": "Etc/UTC",
"theme": "White",
"style": "2",
"locale": "en",
"toolbar_bg": "#f1f3f6",
"hide_top_toolbar": true,
"save_image": false,
"hideideas": true
});
</script>
</head>
<body>
</body>
</html>
Here is a plunker Demo i have created.
The link that i used for the code to get queryparameters.
How can I get query string values in JavaScript?
Hoe it helps :)

This work for me:
My html code:
<div class="dropdown no-arrow">
<select id="my_stocks" class="form-control">
<option value=" ">Select Stock</option>
<option value="AAPL">AAPL</option>
<option value="TSLA">TSLA</option>
</select>
</div>
<div class="card-body">
<!-- TradingView Widget BEGIN -->
<div class="tradingview-widget-container tech_analysis">
<div id="tradingview_3418f"></div>
<div class="tradingview-widget-copyright">
</div>
<script type="text/javascript" src="https://s3.tradingview.com/tv.js"></script>
<script type="text/javascript">
new TradingView.widget(
{
"width": "100%",
"height" : 610,
"symbol": "NASDAQ:AAPL",
"interval": "D",
"timezone": "Etc/UTC",
"theme": "Light",
"style": "1",
"locale": "en",
"toolbar_bg": "#f1f3f6",
"enable_publishing": false,
"allow_symbol_change": true,
"container_id": "tradingview_3418f"
});
</script>
</div>
<!-- TradingView Widget END -->
</div>
My Jquery:
<script>
$(document).on('change','#my_stocks',function(){
var stock_selected = $(this).val();
var fxWidget = new TradingView.widget({
"width": "100%",
"height" : 610,
"symbol": "NASDAQ:"+stock_selected,
"interval": "D",
"timezone": "Etc/UTC",
"theme": "Light",
"style": "1",
"locale": "en",
"toolbar_bg": "#f1f3f6",
"enable_publishing": false,
"allow_symbol_change": true,
"container_id": "tradingview_3418f"
});
});
</script>

amCharts cannot display data?

I am new to amCharts and javascript. My html file looks like:
<!DOCTYPE html>
<html>
<head>
<link rel="shortcut icon" href="">
<title>chart created with amCharts | amCharts</title>
<meta name="description" content="chart created using amCharts live editor" />
<!-- amCharts javascript sources -->
<script type="text/javascript" src="https://www.amcharts.com/lib/3/amcharts.js"></script>
<script type="text/javascript" src="https://www.amcharts.com/lib/3/serial.js"></script>
<script src="https://www.amcharts.com/lib/3/plugins/dataloader/dataloader.min.js"></script>
<!-- amCharts javascript code -->
<script type="text/javascript">
AmCharts.makeChart("chartdiv", {
"type": "serial",
"dataLoader": {
"url": "output.json",
"format": "json"
},
"valueField": "count",
"titleField": "date"
});
</script>
</head>
<body>
<div id="chartdiv" style="width: 100%; height: 400px; background-color: #FFFFFF;"></div>
</body>
</html>
My json file:
[{
"date": "2015-11-17",
"count": "1"
}, {
"date": "2015-11-28",
"count": "1"
}, {
"date": "2016-01-13",
"count": "1"
}, {
"date": "2016-01-22",
"count": "1"
}]
By using http-server -o, Local host opens up in the Chrome browser.
http://127.0.0.1:8080/test2.html
test2.html and output.json are in the same directory
I can see from the chromeconsole, it is loading the json file properly.
I am not able to figure out why the data is not showing up in the chart. I tried browsing and looking at other examples, kind of stuck.

Your chart is missing a few pieces that you can find in any of the line/column demos on the amCharts site. Here's what you're missing:
You're missing a graphs array. This is required for a serial chart (it looks like you started from a pie chart, which is completely different). Each graph object in the graphs array contains a valueField.
Your chart is missing a categoryField.
It looks like your data has dates, so you'll need to create a categoryAxis and set parseDates to true. You'll also want to set a dataDateFormat string in the top level of your chart config as well so that the chart knows how to parse your dates consistently across all browsers.
Assuming you want a line chart, here's the bare minimum makeChart call you need for your data:
AmCharts.makeChart("chartdiv", {
"type": "serial",
"dataLoader": {
"url": "output.json",
"format": "json"
},
"graphs": [{
"valueField": "count"
}],
"categoryField": "date",
"dataDateFormat": "YYYY-MM-DD",
"categoryAxis": {
"parseDates": true
}
});
Demo

Getting coordinates of chart on selecting plot in highcharts

I am generating one image using High-Charts library but i have 40000 polygon series so it takes lot of time in plotting all those points.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title> - jsFiddle demo</title>
<script type='text/javascript' src='http://code.jquery.com/jquery-1.9.1.js'></script>
<link rel="stylesheet" type="text/css" href="/css/result-light.css">
<style type='text/css'>
</style>
<script type='text/javascript'>
$(function () {
var options = {
chart :{
type: 'polygon',
renderTo: 'container',
zoomType:'x'
},
title: {
text: ''
},
yAxis: {
title: false,
gridLineWidth:0,
lineWidth:0,
labels:{
enabled: false
}
},
xAxis: {
title: false,
gridLineWidth:0,
lineWidth:0,
labels:{
enabled: false
}
},
plotOptions: {
series: {
lineWidth: 1,
lineColor:'black',
}
},
series: []
};
$.getJSON('data.json', function(data) {
options.series=data;
var chart = new Highcharts.Chart(options);
})
$.getJSON('title.json', function(title) {
options.title.text=title;
var chart = new Highcharts.Chart(options);
})
});
</script>
</head>
<body>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://highcharts.base.is/highcharts-downsample.js"></script>
<script src="http://highcharts.base.is/demo_data.js"></script>
<script src="http://code.highcharts.com/highcharts-more.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<div id="container" style="min-width: 310px; height: 400px; max-width: 600px; margin: 0 auto"></div>
</body>
sample data.json file
[{"showInLegend": false,"color": "#FFFFFF", "data": [[61448208.5, 10791], [61453100.5, 20575], [61451242.5, 24291], [61446350.5, 14507]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61453100.5, 20575], [61453544, 21462], [61451686, 25178], [61451242.5, 24291]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61453544, 21462], [61453681.5, 21737], [61451823.5, 25453], [61451686, 25178]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61453681.5, 21737], [61459631.5, 33637], [61457773.5, 37353], [61451823.5, 25453]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61459631.5, 33637], [61462023.5, 38421], [61460165.5, 42137], [61457773.5, 37353]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61462023.5, 38421], [61462226, 38826], [61460368, 42542], [61460165.5, 42137]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61462226, 38826], [61462340, 39054], [61460482, 42770], [61460368, 42542]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61462340, 39054], [61462372.5, 39119], [61460514.5, 42835], [61460482, 42770]] }
,{"showInLegend": false,"color": "#FFFFFF", "data": [[61462372.5, 39119], [61462429.5, 39233], [61460571.5, 42949], [61460514.5, 42835]] }
]
Is there any way to down sample multiple series to some 100's or create a mouse event on selection of area so that plot can regenerate plot based on coordinates and read chunk of json data within that range.

If your data sets sizes are 50,000 points and beyond, you can consider using the Highcharts Boost module, released in the beginning of 2017 if memory serves. There are some great examples, like this Highcharts line chart with 600,000 data points across 600 series.
You just include the highcharts Boost module, either directly in a separate tag, or if using NPM just import the boost module from the highcharts package:
import boost from 'highcharts/modules/boost'
Then, you can add some boost options in your Highcharts options object, as an example:
{
boost: {
useGPUTranslations: true
},
title: {
text: 'Highcharts Boost'
},
series: [{
boostThreshold: 1, // Boost when there are more than 1
// point in the chart.
data: [[0, 1], [1, 2], [2, 3]],
}]
};
I've found that module to be of great help as I'm working with multiple series of > 100,000 data points each and multiple charts on one page.