(function (Highcharts) {
    var seriesTypes = Highcharts.seriesTypes,
        each = Highcharts.each;

    seriesTypes.heatmap = Highcharts.extendClass(seriesTypes.map, {
        colorKey: 'z',
        useMapGeometry: false,
        pointArrayMap: ['y', 'z'],
        translate: function () {
            var series = this,
                options = series.options,
                dataMin = Number.MAX_VALUE,
                dataMax = Number.MIN_VALUE;

            series.generatePoints();

            each(series.data, function (point) {
                var x = point.x,
                    y = point.y,
                    value = point.z,
                    xPad = (options.colsize || 1) / 2,
                    yPad = (options.rowsize || 1) / 2;

                point.path = [
                    'M', x - xPad, y - yPad,
                    'L', x + xPad, y - yPad,
                    'L', x + xPad, y + yPad,
                    'L', x - xPad, y + yPad,
                    'Z'
                ];

                point.shapeType = 'path';
                point.shapeArgs = {
                    d: series.translatePath(point.path)
                };

                if (typeof value === 'number') {
                    if (value > dataMax) {
                        dataMax = value;
                    } else if (value < dataMin) {
                        dataMin = value;
                    }
                }
            });

            series.translateColors(dataMin, dataMax);
        },

        getBox: function () { }
    });
}(Highcharts));