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File: bootstrap/chartjs/src/Chart.Bar.js

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File: bootstrap/chartjs/src/Chart.Bar.js
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: Noblesse CMS
Content management system with custom plugins
Author: By
Last change:
Date: 8 years ago
Size: 9,743 bytes
 

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(function(){ "use strict"; var root = this, Chart = root.Chart, helpers = Chart.helpers; var defaultConfig = { //Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value scaleBeginAtZero : true, //Boolean - Whether grid lines are shown across the chart scaleShowGridLines : true, //String - Colour of the grid lines scaleGridLineColor : "rgba(0,0,0,.05)", //Number - Width of the grid lines scaleGridLineWidth : 1, //Boolean - Whether to show horizontal lines (except X axis) scaleShowHorizontalLines: true, //Boolean - Whether to show vertical lines (except Y axis) scaleShowVerticalLines: true, //Boolean - If there is a stroke on each bar barShowStroke : true, //Number - Pixel width of the bar stroke barStrokeWidth : 2, //Number - Spacing between each of the X value sets barValueSpacing : 5, //Number - Spacing between data sets within X values barDatasetSpacing : 1, //String - A legend template legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].fillColor%>\"><%if(datasets[i].label){%><%=datasets[i].label%><%}%></span></li><%}%></ul>" }; Chart.Type.extend({ name: "Bar", defaults : defaultConfig, initialize: function(data){ //Expose options as a scope variable here so we can access it in the ScaleClass var options = this.options; this.ScaleClass = Chart.Scale.extend({ offsetGridLines : true, calculateBarX : function(datasetCount, datasetIndex, barIndex){ //Reusable method for calculating the xPosition of a given bar based on datasetIndex & width of the bar var xWidth = this.calculateBaseWidth(), xAbsolute = this.calculateX(barIndex) - (xWidth/2), barWidth = this.calculateBarWidth(datasetCount); return xAbsolute + (barWidth * datasetIndex) + (datasetIndex * options.barDatasetSpacing) + barWidth/2; }, calculateBaseWidth : function(){ return (this.calculateX(1) - this.calculateX(0)) - (2*options.barValueSpacing); }, calculateBarWidth : function(datasetCount){ //The padding between datasets is to the right of each bar, providing that there are more than 1 dataset var baseWidth = this.calculateBaseWidth() - ((datasetCount - 1) * options.barDatasetSpacing); return (baseWidth / datasetCount); } }); this.datasets = []; //Set up tooltip events on the chart if (this.options.showTooltips){ helpers.bindEvents(this, this.options.tooltipEvents, function(evt){ var activeBars = (evt.type !== 'mouseout') ? this.getBarsAtEvent(evt) : []; this.eachBars(function(bar){ bar.restore(['fillColor', 'strokeColor']); }); helpers.each(activeBars, function(activeBar){ activeBar.fillColor = activeBar.highlightFill; activeBar.strokeColor = activeBar.highlightStroke; }); this.showTooltip(activeBars); }); } //Declare the extension of the default point, to cater for the options passed in to the constructor this.BarClass = Chart.Rectangle.extend({ strokeWidth : this.options.barStrokeWidth, showStroke : this.options.barShowStroke, ctx : this.chart.ctx }); //Iterate through each of the datasets, and build this into a property of the chart helpers.each(data.datasets,function(dataset,datasetIndex){ var datasetObject = { label : dataset.label || null, fillColor : dataset.fillColor, strokeColor : dataset.strokeColor, bars : [] }; this.datasets.push(datasetObject); helpers.each(dataset.data,function(dataPoint,index){ //Add a new point for each piece of data, passing any required data to draw. datasetObject.bars.push(new this.BarClass({ value : dataPoint, label : data.labels[index], datasetLabel: dataset.label, strokeColor : dataset.strokeColor, fillColor : dataset.fillColor, highlightFill : dataset.highlightFill || dataset.fillColor, highlightStroke : dataset.highlightStroke || dataset.strokeColor })); },this); },this); this.buildScale(data.labels); this.BarClass.prototype.base = this.scale.endPoint; this.eachBars(function(bar, index, datasetIndex){ helpers.extend(bar, { width : this.scale.calculateBarWidth(this.datasets.length), x: this.scale.calculateBarX(this.datasets.length, datasetIndex, index), y: this.scale.endPoint }); bar.save(); }, this); this.render(); }, update : function(){ this.scale.update(); // Reset any highlight colours before updating. helpers.each(this.activeElements, function(activeElement){ activeElement.restore(['fillColor', 'strokeColor']); }); this.eachBars(function(bar){ bar.save(); }); this.render(); }, eachBars : function(callback){ helpers.each(this.datasets,function(dataset, datasetIndex){ helpers.each(dataset.bars, callback, this, datasetIndex); },this); }, getBarsAtEvent : function(e){ var barsArray = [], eventPosition = helpers.getRelativePosition(e), datasetIterator = function(dataset){ barsArray.push(dataset.bars[barIndex]); }, barIndex; for (var datasetIndex = 0; datasetIndex < this.datasets.length; datasetIndex++) { for (barIndex = 0; barIndex < this.datasets[datasetIndex].bars.length; barIndex++) { if (this.datasets[datasetIndex].bars[barIndex].inRange(eventPosition.x,eventPosition.y)){ helpers.each(this.datasets, datasetIterator); return barsArray; } } } return barsArray; }, buildScale : function(labels){ var self = this; var dataTotal = function(){ var values = []; self.eachBars(function(bar){ values.push(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 : labels, font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily), lineWidth : this.options.scaleLineWidth, lineColor : this.options.scaleLineColor, showHorizontalLines : this.options.scaleShowHorizontalLines, showVerticalLines : this.options.scaleShowVerticalLines, gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0, gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)", 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){ //Add a new point for each piece of data, passing any required data to draw. this.datasets[datasetIndex].bars.push(new this.BarClass({ value : value, label : label, datasetLabel: this.datasets[datasetIndex].label, x: this.scale.calculateBarX(this.datasets.length, datasetIndex, 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){ if (bar.hasValue()){ bar.base = this.scale.endPoint; //Transition then draw bar.transition({ x : this.scale.calculateBarX(this.datasets.length, datasetIndex, index), y : this.scale.calculateY(bar.value), width : this.scale.calculateBarWidth(this.datasets.length) }, easingDecimal).draw(); } },this); },this); } }); }).call(this);