302 lines
9.8 KiB
JavaScript
302 lines
9.8 KiB
JavaScript
(function (factory) {
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'use strict';
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['angular', 'chart.js'], factory);
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} else if (typeof exports === 'object') {
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// Node/CommonJS
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module.exports = factory(require('angular'), require('chart.js'));
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} else {
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// Browser globals
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factory(angular, Chart);
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}
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}(function (angular, Chart) {
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'use strict';
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Chart.defaults.global.responsive = true;
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Chart.defaults.global.multiTooltipTemplate = '<%if (datasetLabel){%><%=datasetLabel%>: <%}%><%= value %>';
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Chart.defaults.global.colours = [
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'#97BBCD', // blue
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'#DCDCDC', // light grey
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'#F7464A', // red
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'#46BFBD', // green
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'#FDB45C', // yellow
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'#949FB1', // grey
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'#4D5360' // dark grey
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];
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angular.module('chart.js', [])
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.provider('ChartJs', ChartJsProvider)
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.factory('ChartJsFactory', ['ChartJs', ChartJsFactory])
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.directive('chartBase', function (ChartJsFactory) { return new ChartJsFactory(); })
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.directive('chartLine', function (ChartJsFactory) { return new ChartJsFactory('Line'); })
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.directive('chartBar', function (ChartJsFactory) { return new ChartJsFactory('Bar'); })
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.directive('chartRadar', function (ChartJsFactory) { return new ChartJsFactory('Radar'); })
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.directive('chartDoughnut', function (ChartJsFactory) { return new ChartJsFactory('Doughnut'); })
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.directive('chartPie', function (ChartJsFactory) { return new ChartJsFactory('Pie'); })
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.directive('chartPolarArea', function (ChartJsFactory) { return new ChartJsFactory('PolarArea'); });
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/**
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* Wrapper for chart.js
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* Allows configuring chart js using the provider
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*
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* angular.module('myModule', ['chart.js']).config(function(ChartJsProvider) {
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* ChartJsProvider.setOptions({ responsive: true });
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* ChartJsProvider.setOptions('Line', { responsive: false });
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* })))
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*/
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function ChartJsProvider () {
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var options = {};
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var ChartJs = {
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Chart: Chart,
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getOptions: function (type) {
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var typeOptions = type && options[type] || {};
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return angular.extend({}, options, typeOptions);
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}
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};
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/**
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* Allow to set global options during configuration
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*/
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this.setOptions = function (type, customOptions) {
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// If no type was specified set option for the global object
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if (! customOptions) {
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customOptions = type;
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options = angular.extend(options, customOptions);
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return;
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}
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// Set options for the specific chart
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options[type] = angular.extend(options[type] || {}, customOptions);
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};
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this.$get = function () {
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return ChartJs;
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};
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}
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function ChartJsFactory (ChartJs) {
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return function chart (type) {
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return {
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restrict: 'CA',
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scope: {
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data: '=',
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labels: '=',
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options: '=',
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series: '=',
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colours: '=?',
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getColour: '=?',
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chartType: '=',
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legend: '@',
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click: '=',
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hover: '='
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},
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link: function (scope, elem/*, attrs */) {
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var chart, container = document.createElement('div');
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container.className = 'chart-container';
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elem.replaceWith(container);
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container.appendChild(elem[0]);
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if (typeof window.G_vmlCanvasManager === 'object' && window.G_vmlCanvasManager !== null) {
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if (typeof window.G_vmlCanvasManager.initElement === 'function') {
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window.G_vmlCanvasManager.initElement(elem[0]);
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}
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}
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// Order of setting "watch" matter
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scope.$watch('data', function (newVal, oldVal) {
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if (! newVal || ! newVal.length || (Array.isArray(newVal[0]) && ! newVal[0].length)) return;
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var chartType = type || scope.chartType;
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if (! chartType) return;
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if (chart) {
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if (canUpdateChart(newVal, oldVal)) return updateChart(chart, newVal, scope);
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chart.destroy();
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}
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chart = createChart(chartType, scope, elem);
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}, true);
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scope.$watch('series', resetChart, true);
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scope.$watch('labels', resetChart, true);
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scope.$watch('options', resetChart, true);
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scope.$watch('colours', resetChart, true);
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scope.$watch('chartType', function (newVal, oldVal) {
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if (isEmpty(newVal)) return;
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if (angular.equals(newVal, oldVal)) return;
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if (chart) chart.destroy();
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chart = createChart(newVal, scope, elem);
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});
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scope.$on('$destroy', function () {
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if (chart) chart.destroy();
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});
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function resetChart (newVal, oldVal) {
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if (isEmpty(newVal)) return;
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if (angular.equals(newVal, oldVal)) return;
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var chartType = type || scope.chartType;
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if (! chartType) return;
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// chart.update() doesn't work for series and labels
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// so we have to re-create the chart entirely
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if (chart) chart.destroy();
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chart = createChart(chartType, scope, elem);
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}
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}
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};
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};
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function canUpdateChart (newVal, oldVal) {
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if (newVal && oldVal && newVal.length && oldVal.length) {
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return Array.isArray(newVal[0]) ?
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newVal.length === oldVal.length && newVal[0].length === oldVal[0].length :
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oldVal.reduce(sum, 0) > 0 ? newVal.length === oldVal.length : false;
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}
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return false;
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}
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function sum (carry, val) {
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return carry + val;
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}
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function createChart (type, scope, elem) {
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if (! scope.data || ! scope.data.length) return;
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scope.getColour = typeof scope.getColour === 'function' ? scope.getColour : getRandomColour;
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scope.colours = getColours(type, scope);
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var cvs = elem[0], ctx = cvs.getContext('2d');
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var data = Array.isArray(scope.data[0]) ?
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getDataSets(scope.labels, scope.data, scope.series || [], scope.colours) :
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getData(scope.labels, scope.data, scope.colours);
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var options = angular.extend({}, ChartJs.getOptions(type), scope.options);
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var chart = new ChartJs.Chart(ctx)[type](data, options);
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scope.$emit('create', chart);
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['hover', 'click'].forEach(function (action) {
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if (scope[action]) cvs[action === 'click' ? 'onclick' : 'onmousemove'] = getEventHandler(scope, chart, action);
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});
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if (scope.legend && scope.legend !== 'false') setLegend(elem, chart);
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return chart;
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}
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function getEventHandler (scope, chart, action) {
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return function (evt) {
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var atEvent = chart.getPointsAtEvent || chart.getBarsAtEvent || chart.getSegmentsAtEvent;
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if (atEvent) {
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var activePoints = atEvent.call(chart, evt);
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scope[action](activePoints, evt);
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scope.$apply();
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}
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};
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}
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function getColours (type, scope) {
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var colours = angular.copy(scope.colours ||
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ChartJs.getOptions(type).colours ||
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Chart.defaults.global.colours
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);
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while (colours.length < scope.data.length) {
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colours.push(scope.getColour());
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}
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return colours.map(convertColour);
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}
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function convertColour (colour) {
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if (typeof colour === 'object' && colour !== null) return colour;
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if (typeof colour === 'string' && colour[0] === '#') return getColour(hexToRgb(colour.substr(1)));
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return getRandomColour();
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}
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function getRandomColour () {
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var colour = [getRandomInt(0, 255), getRandomInt(0, 255), getRandomInt(0, 255)];
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return getColour(colour);
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}
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function getColour (colour) {
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return {
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fillColor: rgba(colour, 0.2),
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strokeColor: rgba(colour, 1),
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pointColor: rgba(colour, 1),
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pointStrokeColor: '#fff',
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pointHighlightFill: '#fff',
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pointHighlightStroke: rgba(colour, 0.8)
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};
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}
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function getRandomInt (min, max) {
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return Math.floor(Math.random() * (max - min + 1)) + min;
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}
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function rgba (colour, alpha) {
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return 'rgba(' + colour.concat(alpha).join(',') + ')';
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}
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// Credit: http://stackoverflow.com/a/11508164/1190235
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function hexToRgb (hex) {
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var bigint = parseInt(hex, 16),
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r = (bigint >> 16) & 255,
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g = (bigint >> 8) & 255,
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b = bigint & 255;
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return [r, g, b];
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}
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function getDataSets (labels, data, series, colours) {
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return {
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labels: labels,
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datasets: data.map(function (item, i) {
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return angular.extend({}, colours[i], {
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label: series[i],
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data: item
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});
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})
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};
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}
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function getData (labels, data, colours) {
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return labels.map(function (label, i) {
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return angular.extend({}, colours[i], {
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label: label,
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value: data[i],
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color: colours[i].strokeColor,
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highlight: colours[i].pointHighlightStroke
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});
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});
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}
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function setLegend (elem, chart) {
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var $parent = elem.parent(),
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$oldLegend = $parent.find('chart-legend'),
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legend = '<chart-legend>' + chart.generateLegend() + '</chart-legend>';
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if ($oldLegend.length) $oldLegend.replaceWith(legend);
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else $parent.append(legend);
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}
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function updateChart (chart, values, scope) {
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if (Array.isArray(scope.data[0])) {
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chart.datasets.forEach(function (dataset, i) {
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(dataset.points || dataset.bars).forEach(function (dataItem, j) {
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dataItem.value = values[i][j];
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});
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});
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} else {
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chart.segments.forEach(function (segment, i) {
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segment.value = values[i];
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});
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}
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chart.update();
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scope.$emit('update', chart);
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}
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function isEmpty (value) {
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return ! value ||
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(Array.isArray(value) && ! value.length) ||
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(typeof value === 'object' && ! Object.keys(value).length);
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}
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}
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}));
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