Medical/ueditor/third-party/highcharts/modules/drilldown.src.js

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/**
 * Highcharts Drilldown plugin
 * 
 * Author: Torstein Honsi
 * Last revision: 2013-02-18
 * License: MIT License
 *
 * Demo: http://jsfiddle.net/highcharts/Vf3yT/
 */

/*global HighchartsAdapter*/
(function (H) {

	"use strict";

	var noop = function () {},
		defaultOptions = H.getOptions(),
		each = H.each,
		extend = H.extend,
		wrap = H.wrap,
		Chart = H.Chart,
		seriesTypes = H.seriesTypes,
		PieSeries = seriesTypes.pie,
		ColumnSeries = seriesTypes.column,
		fireEvent = HighchartsAdapter.fireEvent;

	// Utilities
	function tweenColors(startColor, endColor, pos) {
		var rgba = [
				Math.round(startColor[0] + (endColor[0] - startColor[0]) * pos),
				Math.round(startColor[1] + (endColor[1] - startColor[1]) * pos),
				Math.round(startColor[2] + (endColor[2] - startColor[2]) * pos),
				startColor[3] + (endColor[3] - startColor[3]) * pos
			];
		return 'rgba(' + rgba.join(',') + ')';
	}

	// Add language
	extend(defaultOptions.lang, {
		drillUpText: '◁ Back to {series.name}'
	});
	defaultOptions.drilldown = {
		activeAxisLabelStyle: {
			cursor: 'pointer',
			color: '#039',
			fontWeight: 'bold',
			textDecoration: 'underline'			
		},
		activeDataLabelStyle: {
			cursor: 'pointer',
			color: '#039',
			fontWeight: 'bold',
			textDecoration: 'underline'			
		},
		animation: {
			duration: 500
		},
		drillUpButton: {
			position: { 
				align: 'right',