/**
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* @license
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* Highcharts funnel module, Beta
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*
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* (c) 2010-2012 Torstein Hønsi
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*
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* License: www.highcharts.com/license
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*/
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/*global Highcharts */
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(function (Highcharts) {
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'use strict';
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// create shortcuts
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var defaultOptions = Highcharts.getOptions(),
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defaultPlotOptions = defaultOptions.plotOptions,
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seriesTypes = Highcharts.seriesTypes,
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merge = Highcharts.merge,
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noop = function () {},
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each = Highcharts.each;
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// set default options
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defaultPlotOptions.funnel = merge(defaultPlotOptions.pie, {
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center: ['50%', '50%'],
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width: '90%',
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neckWidth: '30%',
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height: '100%',
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neckHeight: '25%',
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dataLabels: {
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//position: 'right',
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connectorWidth: 1,
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connectorColor: '#606060'
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},
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size: true, // to avoid adapting to data label size in Pie.drawDataLabels
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states: {
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select: {
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color: '#C0C0C0',
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borderColor: '#000000',
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shadow: false
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}
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}
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});
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seriesTypes.funnel = Highcharts.extendClass(seriesTypes.pie, {
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type: 'funnel',
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animate: noop,
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/**
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* Overrides the pie translate method
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*/
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translate: function () {
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var
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// Get positions - either an integer or a percentage string must be given
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getLength = function (length, relativeTo) {
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return (/%$/).test(length) ?
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relativeTo * parseInt(length, 10) / 100 :
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parseInt(length, 10);
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},
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sum = 0,
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series = this,
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chart = series.chart,
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plotWidth = chart.plotWidth,
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plotHeight = chart.plotHeight,
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cumulative = 0, // start at top
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options = series.options,
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center = options.center,
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centerX = getLength(center[0], plotWidth),
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centerY = getLength(center[0], plotHeight),
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width = getLength(options.width, plotWidth),
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tempWidth,
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getWidthAt,
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height = getLength(options.height, plotHeight),
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neckWidth = getLength(options.neckWidth, plotWidth),
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neckHeight = getLength(options.neckHeight, plotHeight),
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neckY = height - neckHeight,
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data = series.data,
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path,
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fraction,
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half = options.dataLabels.position === 'left' ? 1 : 0,
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x1,
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y1,
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x2,
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x3,
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y3,
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x4,
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y5;
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// Return the width at a specific y coordinate
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series.getWidthAt = getWidthAt = function (y) {
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return y > height - neckHeight || height === neckHeight ?
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neckWidth :
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neckWidth + (width - neckWidth) * ((height - neckHeight - y) / (height - neckHeight));
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};
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series.getX = function (y, half) {
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return centerX + (half ? -1 : 1) * ((getWidthAt(y) / 2) + options.dataLabels.distance);
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};
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// Expose
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series.center = [centerX, centerY, height];
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series.centerX = centerX;
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/*
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* Individual point coordinate naming:
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*
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* x1,y1 _________________ x2,y1
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* \ /
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* \ /
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* \ /
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* \ /
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* \ /
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* x3,y3 _________ x4,y3
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*
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* Additional for the base of the neck:
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*
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* | |
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* | |
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* | |
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* x3,y5 _________ x4,y5
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*/
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// get the total sum
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each(data, function (point) {
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sum += point.y;
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});
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each(data, function (point) {
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// set start and end positions
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y5 = null;
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fraction = sum ? point.y / sum : 0;
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y1 = centerY - height / 2 + cumulative * height;
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y3 = y1 + fraction * height;
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//tempWidth = neckWidth + (width - neckWidth) * ((height - neckHeight - y1) / (height - neckHeight));
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tempWidth = getWidthAt(y1);
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x1 = centerX - tempWidth / 2;
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x2 = x1 + tempWidth;
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tempWidth = getWidthAt(y3);
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x3 = centerX - tempWidth / 2;
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x4 = x3 + tempWidth;
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// the entire point is within the neck
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if (y1 > neckY) {
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x1 = x3 = centerX - neckWidth / 2;
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x2 = x4 = centerX + neckWidth / 2;
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// the base of the neck
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} else if (y3 > neckY) {
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y5 = y3;
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tempWidth = getWidthAt(neckY);
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x3 = centerX - tempWidth / 2;
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x4 = x3 + tempWidth;
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y3 = neckY;
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}
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// save the path
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path = [
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'M',
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x1, y1,
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'L',
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x2, y1,
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x4, y3
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];
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if (y5) {
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path.push(x4, y5, x3, y5);
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}
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path.push(x3, y3, 'Z');
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// prepare for using shared dr
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point.shapeType = 'path';
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point.shapeArgs = { d: path };
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// for tooltips and data labels
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point.percentage = fraction * 100;
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point.plotX = centerX;
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point.plotY = (y1 + (y5 || y3)) / 2;
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// Placement of tooltips and data labels
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point.tooltipPos = [
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centerX,
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point.plotY
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];
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// Slice is a noop on funnel points
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point.slice = noop;
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// Mimicking pie data label placement logic
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point.half = half;
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cumulative += fraction;
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});
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series.setTooltipPoints();
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},
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/**
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* Draw a single point (wedge)
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* @param {Object} point The point object
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* @param {Object} color The color of the point
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* @param {Number} brightness The brightness relative to the color
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*/
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drawPoints: function () {
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var series = this,
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options = series.options,
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chart = series.chart,
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renderer = chart.renderer;
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each(series.data, function (point) {
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var graphic = point.graphic,
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shapeArgs = point.shapeArgs;
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if (!graphic) { // Create the shapes
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point.graphic = renderer.path(shapeArgs).
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attr({
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fill: point.color,
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stroke: options.borderColor,
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'stroke-width': options.borderWidth
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}).
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add(series.group);
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} else { // Update the shapes
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graphic.animate(shapeArgs);
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}
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});
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},
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/**
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* Funnel items don't have angles (#2289)
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*/
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sortByAngle: noop,
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/**
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* Extend the pie data label method
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*/
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drawDataLabels: function () {
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var data = this.data,
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labelDistance = this.options.dataLabels.distance,
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leftSide,
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sign,
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point,
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i = data.length,
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x,
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y;
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// In the original pie label anticollision logic, the slots are distributed
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// from one labelDistance above to one labelDistance below the pie. In funnels
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// we don't want this.
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this.center[2] -= 2 * labelDistance;
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// Set the label position array for each point.
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while (i--) {
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point = data[i];
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leftSide = point.half;
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sign = leftSide ? 1 : -1;
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y = point.plotY;
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x = this.getX(y, leftSide);
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// set the anchor point for data labels
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point.labelPos = [
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0, // first break of connector
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y, // a/a
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x + (labelDistance - 5) * sign, // second break, right outside point shape
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y, // a/a
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x + labelDistance * sign, // landing point for connector
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y, // a/a
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leftSide ? 'right' : 'left', // alignment
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0 // center angle
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];
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}
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seriesTypes.pie.prototype.drawDataLabels.call(this);
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}
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});
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}(Highcharts));
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