518 lines
16 KiB
JavaScript
518 lines
16 KiB
JavaScript
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(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(['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('chart.js'));
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} else {
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// Global browser
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factory(Chart);
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}
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}(function (Chart) {
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"use strict";
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var helpers = Chart.helpers;
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var defaultConfig = {
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scaleBeginAtZero : true,
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//Boolean - Whether grid lines are shown across the chart
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scaleShowGridLines : true,
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//String - Colour of the grid lines
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scaleGridLineColor : "rgba(0,0,0,.05)",
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//Number - Width of the grid lines
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scaleGridLineWidth : 1,
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//Boolean - Whether to show horizontal lines (except X axis)
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scaleShowHorizontalLines: true,
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//Boolean - Whether to show vertical lines (except Y axis)
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scaleShowVerticalLines: true,
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//Boolean - If there is a stroke on each bar
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barShowStroke : true,
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//Number - Pixel width of the bar stroke
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barStrokeWidth : 2,
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//Number - Spacing between each of the X value sets
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barValueSpacing : 5,
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//Boolean - Whether bars should be rendered on a percentage base
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relativeBars : false,
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//String - A legend template
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legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].fillColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>",
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//Boolean - Show total legend
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showTotal: false,
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//String - Color of total legend
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totalColor: '#fff',
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//String - Total Label
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totalLabel: 'Total'
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};
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Chart.Type.extend({
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name: "StackedBar",
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defaults : defaultConfig,
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initialize: function(data){
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//Expose options as a scope variable here so we can access it in the ScaleClass
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var options = this.options;
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this.ScaleClass = Chart.Scale.extend({
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offsetGridLines : true,
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calculateBarX : function(barIndex){
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return this.calculateX(barIndex);
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},
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calculateBarY : function(datasets, dsIndex, barIndex, value){
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var offset = 0,
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sum = 0;
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for(var i = 0; i < datasets.length; i++) {
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sum += datasets[i].bars[barIndex].value;
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}
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for(i = dsIndex; i < datasets.length; i++) {
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if(i === dsIndex && value) {
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offset += value;
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} else {
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offset = +offset + +datasets[i].bars[barIndex].value;
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}
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}
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if(options.relativeBars) {
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offset = offset / sum * 100;
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}
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return this.calculateY(offset);
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},
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calculateBaseWidth : function(){
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return (this.calculateX(1) - this.calculateX(0)) - (2*options.barValueSpacing);
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},
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calculateBaseHeight : function(){
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return (this.calculateY(1) - this.calculateY(0));
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},
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calculateBarWidth : function(datasetCount){
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//The padding between datasets is to the right of each bar, providing that there are more than 1 dataset
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return this.calculateBaseWidth();
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},
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calculateBarHeight : function(datasets, dsIndex, barIndex, value) {
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var sum = 0;
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for(var i = 0; i < datasets.length; i++) {
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sum += datasets[i].bars[barIndex].value;
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}
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if(!value) {
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value = datasets[dsIndex].bars[barIndex].value;
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}
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if(options.relativeBars) {
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value = value / sum * 100;
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}
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return this.calculateY(value);
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}
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});
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this.datasets = [];
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//Set up tooltip events on the chart
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if (this.options.showTooltips){
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helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
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var activeBars = (evt.type !== 'mouseout') ? this.getBarsAtEvent(evt) : [];
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this.eachBars(function(bar){
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bar.restore(['fillColor', 'strokeColor']);
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});
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helpers.each(activeBars, function(activeBar){
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activeBar.fillColor = activeBar.highlightFill;
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activeBar.strokeColor = activeBar.highlightStroke;
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});
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this.showTooltip(activeBars);
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});
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}
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//Declare the extension of the default point, to cater for the options passed in to the constructor
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this.BarClass = Chart.Rectangle.extend({
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strokeWidth : this.options.barStrokeWidth,
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showStroke : this.options.barShowStroke,
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ctx : this.chart.ctx
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});
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//Iterate through each of the datasets, and build this into a property of the chart
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helpers.each(data.datasets,function(dataset,datasetIndex){
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var datasetObject = {
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label : dataset.label || null,
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fillColor : dataset.fillColor,
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strokeColor : dataset.strokeColor,
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bars : []
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};
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this.datasets.push(datasetObject);
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helpers.each(dataset.data,function(dataPoint,index){
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if (helpers.isNumber(dataPoint)){
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//Add a new point for each piece of data, passing any required data to draw.
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//Add 0 as value if !isNumber (e.g. empty values are useful when 0 values should be hidden in tooltip)
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datasetObject.bars.push(new this.BarClass({
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value : helpers.isNumber(dataPoint)?dataPoint:0,
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label : data.labels[index],
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datasetLabel: dataset.label,
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strokeColor : dataset.strokeColor,
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fillColor : dataset.fillColor,
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highlightFill : dataset.highlightFill || dataset.fillColor,
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highlightStroke : dataset.highlightStroke || dataset.strokeColor
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}));
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}
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},this);
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},this);
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this.buildScale(data.labels);
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this.eachBars(function(bar, index, datasetIndex){
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helpers.extend(bar, {
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base: this.scale.endPoint,
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height: 0,
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width : this.scale.calculateBarWidth(this.datasets.length),
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x: this.scale.calculateBarX(index),
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y: this.scale.endPoint
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});
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bar.save();
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}, this);
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this.render();
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},
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showTooltip : function(ChartElements, forceRedraw){
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// Only redraw the chart if we've actually changed what we're hovering on.
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if (typeof this.activeElements === 'undefined') this.activeElements = [];
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helpers = Chart.helpers;
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var isChanged = (function(Elements){
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var changed = false;
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if (Elements.length !== this.activeElements.length){
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changed = true;
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return changed;
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}
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helpers.each(Elements, function(element, index){
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if (element !== this.activeElements[index]){
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changed = true;
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}
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}, this);
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return changed;
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}).call(this, ChartElements);
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if (!isChanged && !forceRedraw){
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return;
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}
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else{
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this.activeElements = ChartElements;
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}
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this.draw();
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if(this.options.customTooltips){
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this.options.customTooltips(false);
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}
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if (ChartElements.length > 0){
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// If we have multiple datasets, show a MultiTooltip for all of the data points at that index
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if (this.datasets && this.datasets.length > 1) {
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var dataArray,
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dataIndex;
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for (var i = this.datasets.length - 1; i >= 0; i--) {
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dataArray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
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dataIndex = helpers.indexOf(dataArray, ChartElements[0]);
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if (dataIndex !== -1){
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break;
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}
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}
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var tooltipLabels = [],
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tooltipColors = [],
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medianPosition = (function(index) {
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// Get all the points at that particular index
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var Elements = [],
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dataCollection,
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xPositions = [],
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yPositions = [],
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xMax,
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yMax,
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xMin,
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yMin;
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helpers.each(this.datasets, function(dataset){
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dataCollection = dataset.points || dataset.bars || dataset.segments;
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if (dataCollection[dataIndex] && dataCollection[dataIndex].hasValue()){
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Elements.push(dataCollection[dataIndex]);
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}
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});
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var total = {
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datasetLabel: this.options.totalLabel,
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value: 0,
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fillColor: this.options.totalColor,
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strokeColor: this.options.totalColor
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};
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helpers.each(Elements, function(element) {
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xPositions.push(element.x);
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yPositions.push(element.y);
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total.value += element.value;
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//Include any colour information about the element
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tooltipLabels.push(helpers.template(this.options.multiTooltipTemplate, element));
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tooltipColors.push({
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fill: element._saved.fillColor || element.fillColor,
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stroke: element._saved.strokeColor || element.strokeColor
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});
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}, this);
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if (this.options.showTotal) {
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tooltipLabels.push(helpers.template(this.options.multiTooltipTemplate, total));
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tooltipColors.push({
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fill: total.fillColor,
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stroke: total.strokeColor
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});
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}
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yMin = helpers.min(yPositions);
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yMax = helpers.max(yPositions);
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xMin = helpers.min(xPositions);
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xMax = helpers.max(xPositions);
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return {
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x: (xMin > this.chart.width/2) ? xMin : xMax,
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y: (yMin + yMax)/2
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};
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}).call(this, dataIndex);
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new Chart.MultiTooltip({
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x: medianPosition.x,
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y: medianPosition.y,
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xPadding: this.options.tooltipXPadding,
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yPadding: this.options.tooltipYPadding,
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xOffset: this.options.tooltipXOffset,
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fillColor: this.options.tooltipFillColor,
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textColor: this.options.tooltipFontColor,
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fontFamily: this.options.tooltipFontFamily,
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fontStyle: this.options.tooltipFontStyle,
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fontSize: this.options.tooltipFontSize,
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titleTextColor: this.options.tooltipTitleFontColor,
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titleFontFamily: this.options.tooltipTitleFontFamily,
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titleFontStyle: this.options.tooltipTitleFontStyle,
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titleFontSize: this.options.tooltipTitleFontSize,
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cornerRadius: this.options.tooltipCornerRadius,
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labels: tooltipLabels,
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legendColors: tooltipColors,
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legendColorBackground : this.options.multiTooltipKeyBackground,
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title: ChartElements[0].label,
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chart: this.chart,
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ctx: this.chart.ctx,
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custom: this.options.customTooltips
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}).draw();
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} else {
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helpers.each(ChartElements, function(Element) {
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var tooltipPosition = Element.tooltipPosition();
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new Chart.Tooltip({
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x: Math.round(tooltipPosition.x),
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y: Math.round(tooltipPosition.y),
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xPadding: this.options.tooltipXPadding,
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yPadding: this.options.tooltipYPadding,
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fillColor: this.options.tooltipFillColor,
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textColor: this.options.tooltipFontColor,
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fontFamily: this.options.tooltipFontFamily,
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fontStyle: this.options.tooltipFontStyle,
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fontSize: this.options.tooltipFontSize,
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caretHeight: this.options.tooltipCaretSize,
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cornerRadius: this.options.tooltipCornerRadius,
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text: helpers.template(this.options.tooltipTemplate, Element),
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chart: this.chart,
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custom: this.options.customTooltips
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}).draw();
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}, this);
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}
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}
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return this;
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},
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update : function(){
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this.scale.update();
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// Reset any highlight colours before updating.
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helpers.each(this.activeElements, function(activeElement){
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activeElement.restore(['fillColor', 'strokeColor']);
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});
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this.eachBars(function(bar){
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bar.save();
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});
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this.render();
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},
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eachBars : function(callback){
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helpers.each(this.datasets,function(dataset, datasetIndex){
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helpers.each(dataset.bars, callback, this, datasetIndex);
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},this);
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},
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getBarsAtEvent : function(e){
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var barsArray = [],
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eventPosition = helpers.getRelativePosition(e),
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datasetIterator = function(dataset){
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barsArray.push(dataset.bars[barIndex]);
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},
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barIndex;
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for (var datasetIndex = 0; datasetIndex < this.datasets.length; datasetIndex++) {
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for (barIndex = 0; barIndex < this.datasets[datasetIndex].bars.length; barIndex++) {
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if (this.datasets[datasetIndex].bars[barIndex].inRange(eventPosition.x,eventPosition.y)){
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helpers.each(this.datasets, datasetIterator);
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return barsArray;
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}
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}
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}
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return barsArray;
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},
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buildScale : function(labels){
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var self = this;
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var dataTotal = function(){
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|
var values = [];
|
||
|
|
helpers.each(self.datasets, function(dataset) {
|
||
|
|
helpers.each(dataset.bars, function(bar, barIndex) {
|
||
|
|
if(!values[barIndex]) values[barIndex] = 0;
|
||
|
|
if(self.options.relativeBars) {
|
||
|
|
values[barIndex] = 100;
|
||
|
|
} else {
|
||
|
|
values[barIndex] = +values[barIndex] + +bar.value;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
});
|
||
|
|
return values;
|
||
|
|
};
|
||
|
|
|
||
|
|
var scaleOptions = {
|
||
|
|
templateString : this.options.scaleLabel,
|
||
|
|
height : this.chart.height,
|
||
|
|
width : this.chart.width,
|
||
|
|
ctx : this.chart.ctx,
|
||
|
|
textColor : this.options.scaleFontColor,
|
||
|
|
fontSize : this.options.scaleFontSize,
|
||
|
|
fontStyle : this.options.scaleFontStyle,
|
||
|
|
fontFamily : this.options.scaleFontFamily,
|
||
|
|
valuesCount : labels.length,
|
||
|
|
beginAtZero : this.options.scaleBeginAtZero,
|
||
|
|
integersOnly : this.options.scaleIntegersOnly,
|
||
|
|
calculateYRange: function(currentHeight){
|
||
|
|
var updatedRanges = helpers.calculateScaleRange(
|
||
|
|
dataTotal(),
|
||
|
|
currentHeight,
|
||
|
|
this.fontSize,
|
||
|
|
this.beginAtZero,
|
||
|
|
this.integersOnly
|
||
|
|
);
|
||
|
|
helpers.extend(this, updatedRanges);
|
||
|
|
},
|
||
|
|
xLabels : this.options.xLabels || labels,
|
||
|
|
font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
|
||
|
|
lineWidth : this.options.scaleLineWidth,
|
||
|
|
lineColor : this.options.scaleLineColor,
|
||
|
|
gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
|
||
|
|
gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
|
||
|
|
showHorizontalLines : this.options.scaleShowHorizontalLines,
|
||
|
|
showVerticalLines : this.options.scaleShowVerticalLines,
|
||
|
|
padding : (this.options.showScale) ? 0 : (this.options.barShowStroke) ? this.options.barStrokeWidth : 0,
|
||
|
|
showLabels : this.options.scaleShowLabels,
|
||
|
|
display : this.options.showScale
|
||
|
|
};
|
||
|
|
|
||
|
|
if (this.options.scaleOverride){
|
||
|
|
helpers.extend(scaleOptions, {
|
||
|
|
calculateYRange: helpers.noop,
|
||
|
|
steps: this.options.scaleSteps,
|
||
|
|
stepValue: this.options.scaleStepWidth,
|
||
|
|
min: this.options.scaleStartValue,
|
||
|
|
max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
this.scale = new this.ScaleClass(scaleOptions);
|
||
|
|
},
|
||
|
|
addData : function(valuesArray,label){
|
||
|
|
//Map the values array for each of the datasets
|
||
|
|
helpers.each(valuesArray,function(value,datasetIndex){
|
||
|
|
if (helpers.isNumber(value)){
|
||
|
|
//Add a new point for each piece of data, passing any required data to draw.
|
||
|
|
//Add 0 as value if !isNumber (e.g. empty values are useful when 0 values should be hidden in tooltip)
|
||
|
|
this.datasets[datasetIndex].bars.push(new this.BarClass({
|
||
|
|
value : helpers.isNumber(value)?value:0,
|
||
|
|
label : label,
|
||
|
|
x: this.scale.calculateBarX(this.scale.valuesCount+1),
|
||
|
|
y: this.scale.endPoint,
|
||
|
|
width : this.scale.calculateBarWidth(this.datasets.length),
|
||
|
|
base : this.scale.endPoint,
|
||
|
|
strokeColor : this.datasets[datasetIndex].strokeColor,
|
||
|
|
fillColor : this.datasets[datasetIndex].fillColor
|
||
|
|
}));
|
||
|
|
}
|
||
|
|
},this);
|
||
|
|
|
||
|
|
this.scale.addXLabel(label);
|
||
|
|
//Then re-render the chart.
|
||
|
|
this.update();
|
||
|
|
},
|
||
|
|
removeData : function(){
|
||
|
|
this.scale.removeXLabel();
|
||
|
|
//Then re-render the chart.
|
||
|
|
helpers.each(this.datasets,function(dataset){
|
||
|
|
dataset.bars.shift();
|
||
|
|
},this);
|
||
|
|
this.update();
|
||
|
|
},
|
||
|
|
reflow : function(){
|
||
|
|
helpers.extend(this.BarClass.prototype,{
|
||
|
|
y: this.scale.endPoint,
|
||
|
|
base : this.scale.endPoint
|
||
|
|
});
|
||
|
|
var newScaleProps = helpers.extend({
|
||
|
|
height : this.chart.height,
|
||
|
|
width : this.chart.width
|
||
|
|
});
|
||
|
|
this.scale.update(newScaleProps);
|
||
|
|
},
|
||
|
|
draw : function(ease){
|
||
|
|
var easingDecimal = ease || 1;
|
||
|
|
this.clear();
|
||
|
|
|
||
|
|
var ctx = this.chart.ctx;
|
||
|
|
|
||
|
|
this.scale.draw(easingDecimal);
|
||
|
|
|
||
|
|
//Draw all the bars for each dataset
|
||
|
|
helpers.each(this.datasets,function(dataset,datasetIndex){
|
||
|
|
helpers.each(dataset.bars,function(bar,index){
|
||
|
|
var y = this.scale.calculateBarY(this.datasets, datasetIndex, index, bar.value),
|
||
|
|
height = this.scale.calculateBarHeight(this.datasets, datasetIndex, index, bar.value);
|
||
|
|
|
||
|
|
//Transition then draw
|
||
|
|
bar.transition({
|
||
|
|
base : this.scale.endPoint - (Math.abs(height) - Math.abs(y)),
|
||
|
|
x : this.scale.calculateBarX(index),
|
||
|
|
y : Math.abs(y),
|
||
|
|
height : Math.abs(height),
|
||
|
|
width : this.scale.calculateBarWidth(this.datasets.length)
|
||
|
|
}, easingDecimal).draw();
|
||
|
|
},this);
|
||
|
|
},this);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}));
|