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CHAP Links Graph

http://www.almende.com
http://almende.github.com/chap-links-library/

DESCRIPTION

The Graph is an interactive visualization chart to draw (measurement) data in 
time. You can freely move and zoom in the graph by dragging and scrolling in the 
window. The time scale on the axis is adjusted automatically, and supports 
scales ranging from milliseconds to years.

The Graph visualization is designed to display large amouts of data in your 
browser. Modern browsers can render up to 100.000 datapoints without problems. 
However, to keep rendering smooth on older browsers too, it is better to keep 
the number of datapoints below 10.000. Note that rendering is faster when a 
smaller part of the data is visible, i.e. when zooming in.

The Graph is developed as a Google Visualization Chart in javascript. There is 
a GWT wrapper available to use the Graph in GWT (Google Web Toolkit). It runs
in all browsers without additional requirements. Graph is tested on Firefox 3.6, 
Safari 5.0, Chrome 6.0, Opera 10.6, Internet Explorer 6 to 9.


USAGE

The Graph is no built-in visualization of Google. To load the Graph, download 
the file graph.zip, and unzip it in your html page such that the files are 
located in a subfolder graph. Include the google API and the following files 
in the head of your html code:

    <script type="text/javascript" src="http://www.google.com/jsapi"></script>
    <script type="text/javascript" src="graph/graph.js"></script>
    <!--[if IE]><script src="../excanvas.js"></script><![endif]-->
    <link rel="stylesheet" type="text/css" href="graph/graph.css">

The google visualization needs to be loaded in order to use DataTable.

    google.load("visualization", "1");
    google.setOnLoadCallback(drawVisualization);
    function drawVisualization() {
      // load data and create the graph here
    }
    
The class name of the Graph is links.Graph

    var graph = new links.Graph(container);

After being loaded, the graph can be drawn via the function draw(), provided 
with data and options.

    graph.draw(data, options);

where data is a DataTable, and options is a name-value map in the JSON format.

DOCUMENTATION

Documentation can be found in the directory doc
Examples can be found in the directory examples