mirror of
https://github.com/chartjs/Chart.js.git
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368 lines
14 KiB
JavaScript
368 lines
14 KiB
JavaScript
(function() {
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"use strict";
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return;
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var root = this,
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Chart = root.Chart,
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//Cache a local reference to Chart.helpers
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helpers = Chart.helpers;
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var defaultConfig = {
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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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hover: {
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mode: 'single'
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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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};
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Chart.Type.extend({
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//Passing in a name registers this chart in the Chart namespace
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name: "Doughnut",
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//Providing a defaults will also register the deafults in the chart namespace
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defaults: defaultConfig,
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//Initialize is fired when the chart is initialized - Data is passed in as a parameter
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//Config is automatically merged by the core of Chart.js, and is available at this.options
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initialize: function() {
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//Set up tooltip events on the chart
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helpers.bindEvents(this, this.options.events, this.events);
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//Create a new bar for each piece of data
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helpers.each(this.data.datasets, function(dataset, datasetIndex) {
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dataset.metaData = [];
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helpers.each(dataset.data, function(dataPoint, index) {
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dataset.metaData.push(new Chart.Arc({
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_chart: this.chart,
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_datasetIndex: datasetIndex,
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_index: index,
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_model: {}
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}));
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}, this);
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}, this);
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// Create tooltip instance exclusively for this chart with some defaults.
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this.tooltip = new Chart.Tooltip({
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_chart: this.chart,
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_data: this.data,
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_options: this.options,
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}, this);
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this.resetElements();
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// Update the chart with the latest data.
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this.update();
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},
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calculateCircumference: function(dataset, value) {
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if (dataset.total > 0) {
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return (Math.PI * 2) * (value / dataset.total);
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} else {
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return 0;
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}
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},
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resetElements: function() {
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this.outerRadius = (helpers.min([this.chart.width, this.chart.height]) - this.options.elements.arc.borderWidth / 2) / 2;
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this.innerRadius = this.options.cutoutPercentage ? (this.outerRadius / 100) * (this.options.cutoutPercentage) : 1;
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this.radiusLength = (this.outerRadius - this.innerRadius) / this.data.datasets.length;
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// Update the points
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helpers.each(this.data.datasets, function(dataset, datasetIndex) {
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// So that calculateCircumference works
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dataset.total = 0;
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helpers.each(dataset.data, function(value) {
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dataset.total += Math.abs(value);
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}, this);
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dataset.outerRadius = this.outerRadius - (this.radiusLength * datasetIndex);
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dataset.innerRadius = dataset.outerRadius - this.radiusLength;
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helpers.each(dataset.metaData, function(slice, index) {
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helpers.extend(slice, {
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_model: {
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x: this.chart.width / 2,
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y: this.chart.height / 2,
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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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circumference: (this.options.animation.animateRotate) ? 0 : this.calculateCircumference(metaSlice.value),
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outerRadius: (this.options.animation.animateScale) ? 0 : dataset.outerRadius,
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innerRadius: (this.options.animation.animateScale) ? 0 : dataset.innerRadius,
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backgroundColor: slice.custom && slice.custom.backgroundColor ? slice.custom.backgroundColor : helpers.getValueAtIndexOrDefault(dataset.backgroundColor, index, this.options.elements.arc.backgroundColor),
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hoverBackgroundColor: slice.custom && slice.custom.hoverBackgroundColor ? slice.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, this.options.elements.arc.hoverBackgroundColor),
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borderWidth: slice.custom && slice.custom.borderWidth ? slice.custom.borderWidth : helpers.getValueAtIndexOrDefault(dataset.borderWidth, index, this.options.elements.arc.borderWidth),
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borderColor: slice.custom && slice.custom.borderColor ? slice.custom.borderColor : helpers.getValueAtIndexOrDefault(dataset.borderColor, index, this.options.elements.arc.borderColor),
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label: helpers.getValueAtIndexOrDefault(dataset.label, index, this.data.labels[index])
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},
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});
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slice.pivot();
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}, this);
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}, this);
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},
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update: function(animationDuration) {
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this.outerRadius = (helpers.min([this.chart.width, this.chart.height]) - this.options.elements.arc.borderWidth / 2) / 2;
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this.innerRadius = this.options.cutoutPercentage ? (this.outerRadius / 100) * (this.options.cutoutPercentage) : 1;
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this.radiusLength = (this.outerRadius - this.innerRadius) / this.data.datasets.length;
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// Update the points
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helpers.each(this.data.datasets, function(dataset, datasetIndex) {
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dataset.total = 0;
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helpers.each(dataset.data, function(value) {
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dataset.total += Math.abs(value);
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}, this);
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dataset.outerRadius = this.outerRadius - (this.radiusLength * datasetIndex);
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dataset.innerRadius = dataset.outerRadius - this.radiusLength;
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helpers.each(dataset.metaData, function(slice, index) {
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helpers.extend(slice, {
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// Utility
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_chart: this.chart,
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_datasetIndex: datasetIndex,
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_index: index,
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// Desired view properties
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_model: {
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x: this.chart.width / 2,
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y: this.chart.height / 2,
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circumference: this.calculateCircumference(dataset, dataset.data[index]),
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outerRadius: dataset.outerRadius,
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innerRadius: dataset.innerRadius,
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backgroundColor: slice.custom && slice.custom.backgroundColor ? slice.custom.backgroundColor : helpers.getValueAtIndexOrDefault(dataset.backgroundColor, index, this.options.elements.arc.backgroundColor),
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hoverBackgroundColor: slice.custom && slice.custom.hoverBackgroundColor ? slice.custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, this.options.elements.arc.hoverBackgroundColor),
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borderWidth: slice.custom && slice.custom.borderWidth ? slice.custom.borderWidth : helpers.getValueAtIndexOrDefault(dataset.borderWidth, index, this.options.elements.arc.borderWidth),
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borderColor: slice.custom && slice.custom.borderColor ? slice.custom.borderColor : helpers.getValueAtIndexOrDefault(dataset.borderColor, index, this.options.elements.arc.borderColor),
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label: helpers.getValueAtIndexOrDefault(dataset.label, index, this.data.labels[index])
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},
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});
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if (index === 0) {
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slice._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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slice._model.startAngle = dataset.metaData[index - 1]._model.endAngle;
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}
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slice._model.endAngle = slice._model.startAngle + slice._model.circumference;
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//Check to see if it's the last slice, if not get the next and update its start angle
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if (index < dataset.data.length - 1) {
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dataset.metaData[index + 1]._model.startAngle = slice._model.endAngle;
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}
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slice.pivot();
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}, this);
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}, this);
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this.render(animationDuration);
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},
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draw: function(easeDecimal) {
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easeDecimal = easeDecimal || 1;
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this.clear();
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this.eachElement(function(slice) {
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slice.transition(easeDecimal).draw();
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}, this);
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this.tooltip.transition(easeDecimal).draw();
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},
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events: function(e) {
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this.lastActive = this.lastActive || [];
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// Find Active Elements
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if (e.type == 'mouseout') {
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this.active = [];
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} else {
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this.active = function() {
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switch (this.options.hover.mode) {
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case 'single':
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return this.getSliceAtEvent(e);
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case 'label':
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return this.getSlicesAtEvent(e);
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case 'dataset':
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return this.getDatasetAtEvent(e);
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default:
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return e;
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}
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}.call(this);
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}
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// On Hover hook
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if (this.options.hover.onHover) {
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this.options.hover.onHover.call(this, this.active);
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}
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if (e.type == 'mouseup' || e.type == 'click') {
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if (this.options.onClick) {
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this.options.onClick.call(this, e, this.active);
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}
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}
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var dataset;
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var index;
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// Remove styling for last active (even if it may still be active)
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if (this.lastActive.length) {
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switch (this.options.hover.mode) {
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case 'single':
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dataset = this.data.datasets[this.lastActive[0]._datasetIndex];
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index = this.lastActive[0]._index;
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this.lastActive[0]._model.backgroundColor = this.lastActive[0].custom && this.lastActive[0].custom.backgroundColor ? this.lastActive[0].custom.backgroundColor : helpers.getValueAtIndexOrDefault(dataset.backgroundColor, index, this.options.elements.arc.backgroundColor);
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this.lastActive[0]._model.borderColor = this.lastActive[0].custom && this.lastActive[0].custom.borderColor ? this.lastActive[0].custom.borderColor : helpers.getValueAtIndexOrDefault(dataset.borderColor, index, this.options.elements.arc.borderColor);
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this.lastActive[0]._model.borderWidth = this.lastActive[0].custom && this.lastActive[0].custom.borderWidth ? this.lastActive[0].custom.borderWidth : helpers.getValueAtIndexOrDefault(dataset.borderWidth, index, this.options.elements.arc.borderWidth);
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break;
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case 'label':
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for (var i = 0; i < this.lastActive.length; i++) {
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dataset = this.data.datasets[this.lastActive[i]._datasetIndex];
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index = this.lastActive[i]._index;
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this.lastActive[i]._model.backgroundColor = this.lastActive[i].custom && this.lastActive[i].custom.backgroundColor ? this.lastActive[i].custom.backgroundColor : helpers.getValueAtIndexOrDefault(dataset.backgroundColor, index, this.options.elements.arc.backgroundColor);
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this.lastActive[i]._model.borderColor = this.lastActive[i].custom && this.lastActive[i].custom.borderColor ? this.lastActive[i].custom.borderColor : helpers.getValueAtIndexOrDefault(dataset.borderColor, index, this.options.elements.arc.borderColor);
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this.lastActive[i]._model.borderWidth = this.lastActive[i].custom && this.lastActive[i].custom.borderWidth ? this.lastActive[i].custom.borderWidth : helpers.getValueAtIndexOrDefault(dataset.borderWidth, index, this.options.elements.arc.borderWidth);
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}
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break;
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case 'dataset':
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break;
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default:
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// Don't change anything
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}
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}
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// Built in hover styling
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if (this.active.length && this.options.hover.mode) {
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switch (this.options.hover.mode) {
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case 'single':
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dataset = this.data.datasets[this.active[0]._datasetIndex];
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index = this.active[0]._index;
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this.active[0]._model.backgroundColor = this.active[0].custom && this.active[0].custom.hoverBackgroundColor ? this.active[0].custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, helpers.color(this.active[0]._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
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this.active[0]._model.borderColor = this.active[0].custom && this.active[0].custom.hoverBorderColor ? this.active[0].custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.hoverBorderColor, index, this.active[0]._model.borderColor);
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this.active[0]._model.borderWidth = this.active[0].custom && this.active[0].custom.hoverBorderWidth ? this.active[0].custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.hoverBorderWidth, index, this.active[0]._model.borderWidth);
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break;
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case 'label':
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for (var i = 0; i < this.active.length; i++) {
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dataset = this.data.datasets[this.active[i]._datasetIndex];
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index = this.active[i]._index;
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this.active[i]._model.backgroundColor = this.active[i].custom && this.active[i].custom.hoverBackgroundColor ? this.active[i].custom.hoverBackgroundColor : helpers.getValueAtIndexOrDefault(dataset.hoverBackgroundColor, index, helpers.color(this.active[i]._model.backgroundColor).saturate(0.5).darken(0.1).rgbString());
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this.active[i]._model.borderColor = this.active[i].custom && this.active[i].custom.hoverBorderColor ? this.active[i].custom.hoverBorderColor : helpers.getValueAtIndexOrDefault(dataset.hoverBorderColor, index, this.active[0]._model.borderColor);
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this.active[i]._model.borderWidth = this.active[i].custom && this.active[i].custom.hoverBorderWidth ? this.active[i].custom.hoverBorderWidth : helpers.getValueAtIndexOrDefault(dataset.hoverBorderWidth, index, this.active[i]._model.borderWidth);
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}
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break;
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case 'dataset':
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break;
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default:
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// Don't change anything
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}
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}
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// Built in Tooltips
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if (this.options.tooltips.enabled) {
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// The usual updates
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this.tooltip.initialize();
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// Active
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if (this.active.length) {
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this.tooltip._model.opacity = 1;
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helpers.extend(this.tooltip, {
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_active: this.active,
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});
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this.tooltip.update();
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} else {
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// Inactive
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this.tooltip._model.opacity = 0;
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}
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}
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// Hover animations
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this.tooltip.pivot();
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if (!this.animating) {
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var changed;
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helpers.each(this.active, function(element, index) {
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if (element !== this.lastActive[index]) {
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changed = true;
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}
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}, this);
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// If entering, leaving, or changing elements, animate the change via pivot
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if ((!this.lastActive.length && this.active.length) ||
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(this.lastActive.length && !this.active.length) ||
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(this.lastActive.length && this.active.length && changed)) {
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this.stop();
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this.render(this.options.hover.animationDuration);
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}
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}
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// Remember Last Active
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this.lastActive = this.active;
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return this;
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},
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getSliceAtEvent: function(e) {
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var elements = [];
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var location = helpers.getRelativePosition(e);
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this.eachElement(function(slice, index) {
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if (slice.inRange(location.x, location.y)) {
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elements.push(slice);
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}
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}, this);
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return elements;
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},
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/*getSlicesAtEvent: function(e) {
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var elements = [];
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var location = helpers.getRelativePosition(e);
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this.eachElement(function(slice, index) {
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if (slice.inLabelRange(location.x, location.y)) {
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elements.push(slice);
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}
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}, this);
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return elements;
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},*/
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});
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Chart.types.Doughnut.extend({
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name: "Pie",
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defaults: helpers.merge(defaultConfig, {
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cutoutPercentage: 0
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})
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});
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}).call(this);
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