heatmap-listener.js

//responds to request when new click is sent
//to /addDataPoint, otherwise hangs
var displayNewDataPoints = function(req, res) {
    MyHeatmap.on('added', function(dt) {
        //print client side js so client heatmap
        //display functions are called
        //and recall this url again
        var str = 'xx.addDataPoint('+dt.x+","+dt.y+');';
        str += 'ajad_send(nurl);';
        res.write(str,'utf8');
        res.end();
    });
};