DefinitelyTyped/nvd3/test/pie.ts

namespace nvd3_test_pie {

    var testdata = [
        { key: "One", y: 5 },
        { key: "Two", y: 2 },
        { key: "Three", y: 9 },
        { key: "Four", y: 7 },
        { key: "Five", y: 4 },
        { key: "Six", y: 3 },
        { key: "Seven", y: 0.5 }
    ];

    var width = 300;
    var height = 300;

    nv.addGraph(function () {
        var chart = nv.models.pie()
            .x(function (d) { return d.key; })
            .y(function (d) { return d.y; })
            .width(width)
            .height(height)
            .labelType(function (d, i, values) {
                return values.key + ':' + values.value;
            })
            ;

        d3.select("#test1")
            .datum([testdata])
            .transition().duration(1200)
            .attr('width', width)
            .attr('height', height)
            .call(chart);

        // LISTEN TO CLICK EVENTS ON THE PIE CONTAINER
        // chart.dispatch.on('chartClick', function() {
        //   code...
        // });

        // LISTEN TO CLICK EVENTS ON THE SLICES OF THE PIE
        // chart.dispatch.on('elementClick', function() {
        //   code...
        // });

        // OTHER EVENTS DISPATCHED BY THE PIE INCLUDE: elementDblClick, elementMouseover, elementMouseout, elementMousemove, renderEnd
        // @see nv.models.pie
        return chart;
    });

    nv.addGraph(function () {
        var chart = nv.models.pie()
            .x(function (d) { return d.key; })
            .y(function (d) { return d.y; })
            .width(width)
            .height(height)
            .labelType('percent')
            .valueFormat(d3.format('%'))
            .donut(true);

        d3.select("#test2")
            .datum([testdata])
            .transition().duration(1200)
            .attr('width', width)
            .attr('height', height)
            .call(chart);

        return chart;
    });

}