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(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));