232 lines
8.9 KiB
JavaScript
Executable File
232 lines
8.9 KiB
JavaScript
Executable File
"use strict";
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module.exports = function(Chart) {
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var helpers = Chart.helpers;
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Chart.defaults.polarArea = {
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scale: {
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type: "radialLinear",
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lineArc: true // so that lines are circular
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},
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//Boolean - Whether to animate the rotation of the chart
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animateRotate: true,
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animateScale: true,
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aspectRatio: 1,
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legendCallback: function(chart) {
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var text = [];
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text.push('<ul class="' + chart.id + '-legend">');
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if (chart.data.datasets.length) {
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for (var i = 0; i < chart.data.datasets[0].data.length; ++i) {
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text.push('<li><span style="background-color:' + chart.data.datasets[0].backgroundColor[i] + '">');
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if (chart.data.labels[i]) {
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text.push(chart.data.labels[i]);
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}
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text.push('</span></li>');
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}
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}
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text.push('</ul>');
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return text.join("");
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},
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legend: {
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labels: {
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generateLabels: function(data) {
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return data.labels.map(function(label, i) {
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return {
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text: label,
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fillStyle: data.datasets[0].backgroundColor[i],
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hidden: isNaN(data.datasets[0].data[i]),
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// Extra data used for toggling the correct item
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index: i
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};
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});
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}
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},
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onClick: function(e, legendItem) {
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helpers.each(this.chart.data.datasets, function(dataset) {
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dataset.metaHiddenData = dataset.metaHiddenData || [];
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var idx = legendItem.index;
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if (!isNaN(dataset.data[idx])) {
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dataset.metaHiddenData[idx] = dataset.data[idx];
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dataset.data[idx] = NaN;
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} else if (!isNaN(dataset.metaHiddenData[idx])) {
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dataset.data[idx] = dataset.metaHiddenData[idx];
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}
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});
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this.chart.update();
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}
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},
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// Need to override these to give a nice default
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tooltips: {
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callbacks: {
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title: function() {
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return '';
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},
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label: function(tooltipItem, data) {
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return data.labels[tooltipItem.index] + ': ' + tooltipItem.yLabel;
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}
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}
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}
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};
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Chart.controllers.polarArea = Chart.DatasetController.extend({
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linkScales: function() {
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// no scales for doughnut
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},
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addElements: function() {
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this.getDataset().metaData = this.getDataset().metaData || [];
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helpers.each(this.getDataset().data, function(value, index) {
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this.getDataset().metaData[index] = this.getDataset().metaData[index] || new Chart.elements.Arc({
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_chart: this.chart.chart,
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_datasetIndex: this.index,
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_index: index
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});
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}, this);
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},
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addElementAndReset: function(index) {
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this.getDataset().metaData = this.getDataset().metaData || [];
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var arc = new Chart.elements.Arc({
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_chart: this.chart.chart,
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_datasetIndex: this.index,
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_index: index
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});
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// Reset the point
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this.updateElement(arc, index, true);
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// Add to the points array
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this.getDataset().metaData.splice(index, 0, arc);
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},
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getVisibleDatasetCount: function getVisibleDatasetCount() {
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return helpers.where(this.chart.data.datasets, function(ds) {
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return helpers.isDatasetVisible(ds);
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}).length;
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},
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update: function update(reset) {
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var minSize = Math.min(this.chart.chartArea.right - this.chart.chartArea.left, this.chart.chartArea.bottom - this.chart.chartArea.top);
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this.chart.outerRadius = Math.max((minSize - this.chart.options.elements.arc.borderWidth / 2) / 2, 0);
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this.chart.innerRadius = Math.max(this.chart.options.cutoutPercentage ? (this.chart.outerRadius / 100) * (this.chart.options.cutoutPercentage) : 1, 0);
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this.chart.radiusLength = (this.chart.outerRadius - this.chart.innerRadius) / this.getVisibleDatasetCount();
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this.getDataset().total = 0;
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helpers.each(this.getDataset().data, function(value) {
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this.getDataset().total += Math.abs(value);
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}, this);
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this.outerRadius = this.chart.outerRadius - (this.chart.radiusLength * this.index);
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this.innerRadius = this.outerRadius - this.chart.radiusLength;
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helpers.each(this.getDataset().metaData, function(arc, index) {
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this.updateElement(arc, index, reset);
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}, this);
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},
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updateElement: function(arc, index, reset) {
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var circumference = this.calculateCircumference(this.getDataset().data[index]);
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var centerX = (this.chart.chartArea.left + this.chart.chartArea.right) / 2;
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var centerY = (this.chart.chartArea.top + this.chart.chartArea.bottom) / 2;
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// If there is NaN data before us, we need to calculate the starting angle correctly.
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// We could be way more efficient here, but its unlikely that the polar area chart will have a lot of data
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var notNullIndex = 0;
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for (var i = 0; i < index; ++i) {
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if (!isNaN(this.getDataset().data[i])) {
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++notNullIndex;
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}
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}
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var startAngle = (-0.5 * Math.PI) + (circumference * notNullIndex);
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var endAngle = startAngle + circumference;
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var resetModel = {
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x: centerX,
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y: centerY,
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innerRadius: 0,
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outerRadius: this.chart.options.animateScale ? 0 : this.chart.scale.getDistanceFromCenterForValue(this.getDataset().data[index]),
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startAngle: this.chart.options.animateRotate ? Math.PI * -0.5 : startAngle,
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endAngle: this.chart.options.animateRotate ? Math.PI * -0.5 : endAngle,
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backgroundColor: arc.custom && arc.custom.backgroundColor ? arc.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.arc.backgroundColor),
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borderWidth: arc.custom && arc.custom.borderWidth ? arc.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.arc.borderWidth),
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borderColor: arc.custom && arc.custom.borderColor ? arc.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.arc.borderColor),
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label: helpers.getValueAtIndexOrDefault(this.chart.data.labels, index, this.chart.data.labels[index])
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};
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helpers.extend(arc, {
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// Utility
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_chart: this.chart.chart,
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_datasetIndex: this.index,
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_index: index,
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_scale: this.chart.scale,
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// Desired view properties
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_model: reset ? resetModel : {
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x: centerX,
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y: centerY,
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innerRadius: 0,
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outerRadius: this.chart.scale.getDistanceFromCenterForValue(this.getDataset().data[index]),
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startAngle: startAngle,
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endAngle: endAngle,
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backgroundColor: arc.custom && arc.custom.backgroundColor ? arc.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.arc.backgroundColor),
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borderWidth: arc.custom && arc.custom.borderWidth ? arc.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.arc.borderWidth),
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borderColor: arc.custom && arc.custom.borderColor ? arc.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.arc.borderColor),
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label: helpers.getValueAtIndexOrDefault(this.chart.data.labels, index, this.chart.data.labels[index])
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}
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});
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arc.pivot();
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},
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draw: function(ease) {
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var easingDecimal = ease || 1;
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helpers.each(this.getDataset().metaData, function(arc, index) {
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arc.transition(easingDecimal).draw();
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});
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},
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setHoverStyle: function(arc) {
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var dataset = this.chart.data.datasets[arc._datasetIndex];
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var index = arc._index;
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arc._model.backgroundColor = arc.custom && arc.custom.hoverBackgroundColor ? arc.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, helpers.color(arc._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
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arc._model.borderColor = arc.custom && arc.custom.hoverBorderColor ? arc.custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.hoverBorderColor, index, helpers.color(arc._model.borderColor).saturate(0.5).darken(0.1).rgbString());
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arc._model.borderWidth = arc.custom && arc.custom.hoverBorderWidth ? arc.custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.hoverBorderWidth, index, arc._model.borderWidth);
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},
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removeHoverStyle: function(arc) {
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var dataset = this.chart.data.datasets[arc._datasetIndex];
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var index = arc._index;
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arc._model.backgroundColor = arc.custom && arc.custom.backgroundColor ? arc.custom.backgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().backgroundColor, index, this.chart.options.elements.arc.backgroundColor);
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arc._model.borderColor = arc.custom && arc.custom.borderColor ? arc.custom.borderColor : helpers.getValueAtIndexOrDefault(this.getDataset().borderColor, index, this.chart.options.elements.arc.borderColor);
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arc._model.borderWidth = arc.custom && arc.custom.borderWidth ? arc.custom.borderWidth : helpers.getValueAtIndexOrDefault(this.getDataset().borderWidth, index, this.chart.options.elements.arc.borderWidth);
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},
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calculateCircumference: function(value) {
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if (isNaN(value)) {
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return 0;
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} else {
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// Count the number of NaN values
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var numNaN = helpers.where(this.getDataset().data, function(data) {
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return isNaN(data);
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}).length;
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return (2 * Math.PI) / (this.getDataset().data.length - numNaN);
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}
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}
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});
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}; |