253 lines
9.5 KiB
JavaScript
Executable file
253 lines
9.5 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.doughnut = {
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animation: {
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//Boolean - Whether we animate the rotation of the Doughnut
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animateRotate: true,
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//Boolean - Whether we animate scaling the Doughnut from the centre
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animateScale: false
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},
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aspectRatio: 1,
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hover: {
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mode: 'single'
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},
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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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//The percentage of the chart that we cut out of the middle.
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cutoutPercentage: 50,
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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] + ': ' + data.datasets[tooltipItem.datasetIndex].data[tooltipItem.index];
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}
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}
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}
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};
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Chart.defaults.pie = helpers.clone(Chart.defaults.doughnut);
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helpers.extend(Chart.defaults.pie, {
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cutoutPercentage: 0
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});
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Chart.controllers.doughnut = Chart.controllers.pie = 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, colorForNewElement) {
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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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if (colorForNewElement && helpers.isArray(this.getDataset().backgroundColor)) {
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this.getDataset().backgroundColor.splice(index, 0, colorForNewElement);
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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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// Get index of the dataset in relation to the visible datasets. This allows determining the inner and outer radius correctly
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getRingIndex: function getRingIndex(datasetIndex) {
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var ringIndex = 0;
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for (var j = 0; j < datasetIndex; ++j) {
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if (helpers.isDatasetVisible(this.chart.data.datasets[j])) {
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++ringIndex;
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}
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}
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return ringIndex;
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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 / 2) - this.chart.options.elements.arc.borderWidth / 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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if (!isNaN(value)) {
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this.getDataset().total += Math.abs(value);
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}
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}, this);
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this.outerRadius = this.chart.outerRadius - (this.chart.radiusLength * this.getRingIndex(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 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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var resetModel = {
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x: centerX,
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y: centerY,
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startAngle: Math.PI * -0.5, // use - PI / 2 instead of 3PI / 2 to make animations better. It means that we never deal with overflow during the transition function
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endAngle: Math.PI * -0.5,
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circumference: (this.chart.options.animation.animateRotate) ? 0 : this.calculateCircumference(this.getDataset().data[index]),
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outerRadius: (this.chart.options.animation.animateScale) ? 0 : this.outerRadius,
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innerRadius: (this.chart.options.animation.animateScale) ? 0 : this.innerRadius
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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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// 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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circumference: this.calculateCircumference(this.getDataset().data[index]),
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outerRadius: this.outerRadius,
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innerRadius: this.innerRadius,
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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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hoverBackgroundColor: arc.custom && arc.custom.hoverBackgroundColor ? arc.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(this.getDataset().hoverBackgroundColor, index, this.chart.options.elements.arc.hoverBackgroundColor),
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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.getDataset().label, index, this.chart.data.labels[index])
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}
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});
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if (!reset) {
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if (index === 0) {
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arc._model.startAngle = Math.PI * -0.5; // use - PI / 2 instead of 3PI / 2 to make animations better. It means that we never deal with overflow during the transition function
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} else {
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arc._model.startAngle = this.getDataset().metaData[index - 1]._model.endAngle;
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}
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arc._model.endAngle = arc._model.startAngle + arc._model.circumference;
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//Check to see if it's the last arc, if not get the next and update its start angle
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if (index < this.getDataset().data.length - 1) {
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this.getDataset().metaData[index + 1]._model.startAngle = arc._model.endAngle;
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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 (this.getDataset().total > 0 && !isNaN(value)) {
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return (Math.PI * 1.999999) * (value / this.getDataset().total);
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} else {
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return 0;
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}
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}
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});
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}; |