<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>Ajax Data Loading</title>
<script type="text/javascript" src="./../js/AnyChartStock.js?v=1.9.0r9317"></script>
<script type="text/javascript" src="./js/jquery.min.js"></script>
<script type="text/javascript">
// Creating new chart object.
var chart = new AnyChartStock("./../swf/AnyChartStock.swf?v=1.9.0r9317", "./../swf/Preloader.swf?v=1.9.0r9317");
// Setting XML config file.
chart.setXMLFile("config.xml");
// Writing the flash object into the page DOM.
chart.write("chartContainer");
// NOTE: needConfig flag set to true, it provides an ability to work with chart objectModel
chart.needConfig = true;
// Settings wMode to prevent Flash movie to overlay HTML div
chart.wMode = 'opaque';
// Function is called when DOMDocumentContentLoaded event happens
$(function(){
// Overlay which is shown when new data is loading
var overlay = $('<div></div>').text('No data to display').css({
display: 'none',
position: 'absolute',
top:0, left:0, right: 0, bottom: 0,
backgroundColor: '#fff',
backgroundRepeat: 'no-repeat',
backgroundPosition: '330px 260px',
border: '1px solid #ddd',
padding: '235px 330px'
});
// event is fired each time flash object is redrawn
chart.onChartDraw = function() {
// "this" refers to chart object here
// set handler to null - make sure event is fired only once
this.onChartDraw = null;
overlay.appendTo('#chartContainer').show()
}
// Code is executed 'onchange' event of #dataSet node
$('#dataSet').change(function(){
var val = $(this).val();
if (val != '_none_') {
$.ajax({ // then make an AJAX-request
async: true,
cache: false,
url: './data/' + val + '_daily.csv',
dataType: 'text', // csv data is text
beforeSend: function() {
// Removes old data, note that "from" and "to" dates are used
chart.removeDataRange('ds1', chart.getFirstDate(), chart.getLastDate());
// Show overlay with "loading data" message
overlay
.text('Loading data...')
.css({
backgroundImage: 'url(./preloader.gif)',
opacity: 0.8
})
.show();
},
success: function(resp) { // "resp" variable is a response to AJAX-request
// Append new data into the 'ds1' data set
chart.appendData('ds1', resp);
// getSeriesById method returns 's1' series 'main' chart,
// you can also use full path to the series through the objectModel, but this way is shorter
chart.getSeriesById('main', 's1').name = val;
// Apply dataset changes
chart.commitDataChanges();
// Apply settings changes (new series name)
chart.applySettingsChanges();
// Hide overlay:
overlay.hide()
}
});
} else { // "_none_" is a special value that means, that nothing should be loaded
overlay
.text('No data to display')
.css({
backgroundImage: 'none',
opacity: 1
})
.show();
}
});
});
</script>
<style type="text/css">
#chartContainer{width: 830px;height: 520px;float: left;margin-right:20px;position:relative;}
.settings{border:1px solid #D0CDC9;width:150px;}
.settings th{font:bold 60% Verdana;background: #DCD9D5;padding:5px 0 5px 10px;text-align:left;}
.settings td{background:#F8F4F0;font:normal 70% Verdana;padding:2px 10px;text-align:left;}
#dataSet{width:100%;}
</style>
</head>
<body>
<div id="chartContainer"></div>
<table class="settings">
<tr><th>Select data set to load:</th></tr>
<tr>
<td>
<select id="dataSet" autocomplete="off">
<option value="_none_">None</option>
<option value="msft">MSFT</option>
<option value="orcl">ORCL</option>
<option value="csco">CSCO</option>
<option value="gspc">GSPC</option>
</select>
</td>
</tr>
</table>
</body>
</html>
Sample Description
How to use this sample?
Use dropdown selector to change chart data sets.
How it works
AnyChart Stock Component allows real-time data loading. This sample shows how to load CSV data from the server using AJAX and add this data directly into the data set.
Initial XML configuration file (config.xml) contains only one data set with source_mode set to "InternalData", but with empty <csv_data> node. Such empty data set generates empty chart, which is overlaid with special <div>.
When user changes the data set, CSV file is loaded using AJAX, old data is removed using removeDataRange() method, and new data is pasted using appendData method. You can learn more about this technique in Real-Time Data Streaming and Data Manipulations article.
Note, that when data is changed we also change series name using object model, learn more about object model in Updating Chart using Object Model article. Don't forget, that working with object model is possible only when needConfig property is set to true.
Loading data with AJAX takes some time, so we place an overlay <div> with "Loading" message when loading starts, when loading ends - we hide it, note, that wMode should be set to "opaque" to allow showing anything over the Flash object.
AnyChartStock JavaScript API
This sample uses the following methods, properties and events from AnyChartStock JavaScript API:
| Item |
Type |
Description |
| needConfig |
Property (Boolean) |
Defines whether the access to full chart configuration object model is required.
|
| wMode |
Property (String) |
Sets the Window Mode property of the Flash movie for transparency, layering, and positioning in the browser.
|
| appendData |
Method |
Appends data to the chart.
|
| applySettingsChanges |
Method |
Commits changes made to settings element of the objectModel.
|
| commitDataChanges |
Method |
Commits data appends and data points erasure made by appendData(), removeDataRow() and removeDataRange() method calls.
|
| getFirstDate |
Method |
Gets the first date of all used by visible series data sources.
|
| getLastDate |
Method |
Gets the last date from all mapped and used by visible series data sources.
|
| getSeriesById |
Method |
Gets series object from the object model by its id.
|
| removeDataRange |
Method |
Removes data range from a data set by the range of dates.
|
| setXMLFile |
Method |
Sets chart XML configuration file path.
|
| write |
Method |
Adds the chart to HTML DOM as a child of the specified container.
|
| onChartDraw |
Event |
This event is dispatched when the AnyChart Stock is drawn. |
Prerequisites
This section lists all configuration, data and auxiliary files required for this sample.
Configuration file
SWF files
- AnyChartStock.swf - AnyChart Stock component.
- Preloader.swf - AnyChart Stock helper component that loads the main component (AnyChartStock.swf) and displays loading progress.
JavaScript Libraries
- jquery.min.js - A JavaScript jQuery library. Learn more at jQuery official site.
- AnyChartStock.js - A JavaScript library that is shipped with AnyChart Stock component. It is used to embed the component into HTML DOM and to comunicate with the Flash part.
Additional Files
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