require([
    "splunkjs/mvc",
    "splunkjs/mvc/simplexml/ready!"
], function(mvc) {

    var chartId = 'pie_chart';
    var chart = mvc.Components.get(chartId);
    var chartManager = mvc.Components.get(chart.managerid);
    var sumEvents = function(previous, current) {
        return parseInt(previous[1]) + parseInt(current[1]);
    }

    chartManager.on("search:done", function(d) {
        var results = chartManager.data('results');
        results.on("data", function() {
            var total = results.data().rows.reduce(sumEvents);
            var div = $('#' + chartId + ' > div > h3');
            var newText = div.text().replace(/\d+(,\d+)*/g, total.toLocaleString());
            div.text(newText);
        });
    });

});