client-freqwatch/Chart.js/Chart.js

   1 /*!
   2  * Chart.js
   3  * http://chartjs.org/
   4  * Version: 1.0.2
   5  *
   6  * Copyright 2015 Nick Downie
   7  * Released under the MIT license
   8  * https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
   9  */
  10
  11
  12 (function(){
  13
  14         "use strict";
  15
  16         //Declare root variable - window in the browser, global on the server
  17         var root = this,
  18                 previous = root.Chart;
  19
  20         //Occupy the global variable of Chart, and create a simple base class
  21         var Chart = function(context){
  22                 var chart = this;
  23                 this.canvas = context.canvas;
  24
  25                 this.ctx = context;
  26
  27                 //Variables global to the chart
  28                 var computeDimension = function(element,dimension)
  29                 {
  30                         if (element['offset'+dimension])
  31                         {
  32                                 return element['offset'+dimension];
  33                         }
  34                         else
  35                         {
  36                                 return document.defaultView.getComputedStyle(element).getPropertyValue(dimension);
  37                         }
  38                 }
  39
  40                 var width = this.width = computeDimension(context.canvas,'Width');
  41                 var height = this.height = computeDimension(context.canvas,'Height');
  42
  43                 // Firefox requires this to work correctly
  44                 context.canvas.width  = width;
  45                 context.canvas.height = height;
  46
  47                 var width = this.width = context.canvas.width;
  48                 var height = this.height = context.canvas.height;
  49                 this.aspectRatio = this.width / this.height;
  50                 //High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
  51                 helpers.retinaScale(this);
  52
  53                 return this;
  54         };
  55         //Globally expose the defaults to allow for user updating/changing
  56         Chart.defaults = {
  57                 global: {
  58                         // Boolean - Whether to animate the chart
  59                         animation: true,
  60
  61                         // Number - Number of animation steps
  62                         animationSteps: 60,
  63
  64                         // String - Animation easing effect
  65                         animationEasing: "easeOutQuart",
  66
  67                         // Boolean - If we should show the scale at all
  68                         showScale: true,
  69
  70                         // Boolean - If we want to override with a hard coded scale
  71                         scaleOverride: false,
  72
  73                         // ** Required if scaleOverride is true **
  74                         // Number - The number of steps in a hard coded scale
  75                         scaleSteps: null,
  76                         // Number - The value jump in the hard coded scale
  77                         scaleStepWidth: null,
  78                         // Number - The scale starting value
  79                         scaleStartValue: null,
  80
  81                         // String - Colour of the scale line
  82                         scaleLineColor: "rgba(0,0,0,.1)",
  83
  84                         // Number - Pixel width of the scale line
  85                         scaleLineWidth: 1,
  86
  87                         // Boolean - Whether to show labels on the scale
  88                         scaleShowLabels: true,
  89
  90                         // Interpolated JS string - can access value
  91                         scaleLabel: "<%=value%>",
  92
  93                         // Boolean - Whether the scale should stick to integers, and not show any floats even if drawing space is there
  94                         scaleIntegersOnly: true,
  95
  96                         // Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
  97                         scaleBeginAtZero: false,
  98
  99                         // String - Scale label font declaration for the scale label
 100                         scaleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
 101
 102                         // Number - Scale label font size in pixels
 103                         scaleFontSize: 12,
 104
 105                         // String - Scale label font weight style
 106                         scaleFontStyle: "normal",
 107
 108                         // String - Scale label font colour
 109                         scaleFontColor: "#666",
 110
 111                         // Boolean - whether or not the chart should be responsive and resize when the browser does.
 112                         responsive: false,
 113
 114                         // Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
 115                         maintainAspectRatio: true,
 116
 117                         // Boolean - Determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove
 118                         showTooltips: true,
 119
 120                         // Boolean - Determines whether to draw built-in tooltip or call custom tooltip function
 121                         customTooltips: false,
 122
 123                         // Array - Array of string names to attach tooltip events
 124                         tooltipEvents: ["mousemove", "touchstart", "touchmove", "mouseout"],
 125
 126                         // String - Tooltip background colour
 127                         tooltipFillColor: "rgba(0,0,0,0.8)",
 128
 129                         // String - Tooltip label font declaration for the scale label
 130                         tooltipFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
 131
 132                         // Number - Tooltip label font size in pixels
 133                         tooltipFontSize: 14,
 134
 135                         // String - Tooltip font weight style
 136                         tooltipFontStyle: "normal",
 137
 138                         // String - Tooltip label font colour
 139                         tooltipFontColor: "#fff",
 140
 141                         // String - Tooltip title font declaration for the scale label
 142                         tooltipTitleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
 143
 144                         // Number - Tooltip title font size in pixels
 145                         tooltipTitleFontSize: 14,
 146
 147                         // String - Tooltip title font weight style
 148                         tooltipTitleFontStyle: "bold",
 149
 150                         // String - Tooltip title font colour
 151                         tooltipTitleFontColor: "#fff",
 152
 153                         // Number - pixel width of padding around tooltip text
 154                         tooltipYPadding: 6,
 155
 156                         // Number - pixel width of padding around tooltip text
 157                         tooltipXPadding: 6,
 158
 159                         // Number - Size of the caret on the tooltip
 160                         tooltipCaretSize: 8,
 161
 162                         // Number - Pixel radius of the tooltip border
 163                         tooltipCornerRadius: 6,
 164
 165                         // Number - Pixel offset from point x to tooltip edge
 166                         tooltipXOffset: 10,
 167
 168                         // String - Template string for single tooltips
 169                         tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>",
 170
 171                         // String - Template string for single tooltips
 172                         multiTooltipTemplate: "<%= value %>",
 173
 174                         // String - Colour behind the legend colour block
 175                         multiTooltipKeyBackground: '#fff',
 176
 177                         // Function - Will fire on animation progression.
 178                         onAnimationProgress: function(){},
 179
 180                         // Function - Will fire on animation completion.
 181                         onAnimationComplete: function(){}
 182
 183                 }
 184         };
 185
 186         //Create a dictionary of chart types, to allow for extension of existing types
 187         Chart.types = {};
 188
 189         //Global Chart helpers object for utility methods and classes
 190         var helpers = Chart.helpers = {};
 191
 192                 //-- Basic js utility methods
 193         var each = helpers.each = function(loopable,callback,self){
 194                         var additionalArgs = Array.prototype.slice.call(arguments, 3);
 195                         // Check to see if null or undefined firstly.
 196                         if (loopable){
 197                                 if (loopable.length === +loopable.length){
 198                                         var i;
 199                                         for (i=0; i<loopable.length; i++){
 200                                                 callback.apply(self,[loopable[i], i].concat(additionalArgs));
 201                                         }
 202                                 }
 203                                 else{
 204                                         for (var item in loopable){
 205                                                 callback.apply(self,[loopable[item],item].concat(additionalArgs));
 206                                         }
 207                                 }
 208                         }
 209                 },
 210                 clone = helpers.clone = function(obj){
 211                         var objClone = {};
 212                         each(obj,function(value,key){
 213                                 if (obj.hasOwnProperty(key)) objClone[key] = value;
 214                         });
 215                         return objClone;
 216                 },
 217                 extend = helpers.extend = function(base){
 218                         each(Array.prototype.slice.call(arguments,1), function(extensionObject) {
 219                                 each(extensionObject,function(value,key){
 220                                         if (extensionObject.hasOwnProperty(key)) base[key] = value;
 221                                 });
 222                         });
 223                         return base;
 224                 },
 225                 merge = helpers.merge = function(base,master){
 226                         //Merge properties in left object over to a shallow clone of object right.
 227                         var args = Array.prototype.slice.call(arguments,0);
 228                         args.unshift({});
 229                         return extend.apply(null, args);
 230                 },
 231                 indexOf = helpers.indexOf = function(arrayToSearch, item){
 232                         if (Array.prototype.indexOf) {
 233                                 return arrayToSearch.indexOf(item);
 234                         }
 235                         else{
 236                                 for (var i = 0; i < arrayToSearch.length; i++) {
 237                                         if (arrayToSearch[i] === item) return i;
 238                                 }
 239                                 return -1;
 240                         }
 241                 },
 242                 where = helpers.where = function(collection, filterCallback){
 243                         var filtered = [];
 244
 245                         helpers.each(collection, function(item){
 246                                 if (filterCallback(item)){
 247                                         filtered.push(item);
 248                                 }
 249                         });
 250
 251                         return filtered;
 252                 },
 253                 findNextWhere = helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex){
 254                         // Default to start of the array
 255                         if (!startIndex){
 256                                 startIndex = -1;
 257                         }
 258                         for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
 259                                 var currentItem = arrayToSearch[i];
 260                                 if (filterCallback(currentItem)){
 261                                         return currentItem;
 262                                 }
 263                         }
 264                 },
 265                 findPreviousWhere = helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex){
 266                         // Default to end of the array
 267                         if (!startIndex){
 268                                 startIndex = arrayToSearch.length;
 269                         }
 270                         for (var i = startIndex - 1; i >= 0; i--) {
 271                                 var currentItem = arrayToSearch[i];
 272                                 if (filterCallback(currentItem)){
 273                                         return currentItem;
 274                                 }
 275                         }
 276                 },
 277                 inherits = helpers.inherits = function(extensions){
 278                         //Basic javascript inheritance based on the model created in Backbone.js
 279                         var parent = this;
 280                         var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function(){ return parent.apply(this, arguments); };
 281
 282                         var Surrogate = function(){ this.constructor = ChartElement;};
 283                         Surrogate.prototype = parent.prototype;
 284                         ChartElement.prototype = new Surrogate();
 285
 286                         ChartElement.extend = inherits;
 287
 288                         if (extensions) extend(ChartElement.prototype, extensions);
 289
 290                         ChartElement.__super__ = parent.prototype;
 291
 292                         return ChartElement;
 293                 },
 294                 noop = helpers.noop = function(){},
 295                 uid = helpers.uid = (function(){
 296                         var id=0;
 297                         return function(){
 298                                 return "chart-" + id++;
 299                         };
 300                 })(),
 301                 warn = helpers.warn = function(str){
 302                         //Method for warning of errors
 303                         if (window.console && typeof window.console.warn == "function") console.warn(str);
 304                 },
 305                 amd = helpers.amd = (typeof define == 'function' && define.amd),
 306                 //-- Math methods
 307                 isNumber = helpers.isNumber = function(n){
 308                         return !isNaN(parseFloat(n)) && isFinite(n);
 309                 },
 310                 max = helpers.max = function(array){
 311                         return Math.max.apply( Math, array );
 312                 },
 313                 min = helpers.min = function(array){
 314                         return Math.min.apply( Math, array );
 315                 },
 316                 cap = helpers.cap = function(valueToCap,maxValue,minValue){
 317                         if(isNumber(maxValue)) {
 318                                 if( valueToCap > maxValue ) {
 319                                         return maxValue;
 320                                 }
 321                         }
 322                         else if(isNumber(minValue)){
 323                                 if ( valueToCap < minValue ){
 324                                         return minValue;
 325                                 }
 326                         }
 327                         return valueToCap;
 328                 },
 329                 getDecimalPlaces = helpers.getDecimalPlaces = function(num){
 330                         if (num%1!==0 && isNumber(num)){
 331                                 return num.toString().split(".")[1].length;
 332                         }
 333                         else {
 334                                 return 0;
 335                         }
 336                 },
 337                 toRadians = helpers.radians = function(degrees){
 338                         return degrees * (Math.PI/180);
 339                 },
 340                 // Gets the angle from vertical upright to the point about a centre.
 341                 getAngleFromPoint = helpers.getAngleFromPoint = function(centrePoint, anglePoint){
 342                         var distanceFromXCenter = anglePoint.x - centrePoint.x,
 343                                 distanceFromYCenter = anglePoint.y - centrePoint.y,
 344                                 radialDistanceFromCenter = Math.sqrt( distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
 345
 346
 347                         var angle = Math.PI * 2 + Math.atan2(distanceFromYCenter, distanceFromXCenter);
 348
 349                         //If the segment is in the top left quadrant, we need to add another rotation to the angle
 350                         if (distanceFromXCenter < 0 && distanceFromYCenter < 0){
 351                                 angle += Math.PI*2;
 352                         }
 353
 354                         return {
 355                                 angle: angle,
 356                                 distance: radialDistanceFromCenter
 357                         };
 358                 },
 359                 aliasPixel = helpers.aliasPixel = function(pixelWidth){
 360                         return (pixelWidth % 2 === 0) ? 0 : 0.5;
 361                 },
 362                 splineCurve = helpers.splineCurve = function(FirstPoint,MiddlePoint,AfterPoint,t){
 363                         //Props to Rob Spencer at scaled innovation for his post on splining between points
 364                         //http://scaledinnovation.com/analytics/splines/aboutSplines.html
 365                         var d01=Math.sqrt(Math.pow(MiddlePoint.x-FirstPoint.x,2)+Math.pow(MiddlePoint.y-FirstPoint.y,2)),
 366                                 d12=Math.sqrt(Math.pow(AfterPoint.x-MiddlePoint.x,2)+Math.pow(AfterPoint.y-MiddlePoint.y,2)),
 367                                 fa=t*d01/(d01+d12),// scaling factor for triangle Ta
 368                                 fb=t*d12/(d01+d12);
 369                         return {
 370                                 inner : {
 371                                         x : MiddlePoint.x-fa*(AfterPoint.x-FirstPoint.x),
 372                                         y : MiddlePoint.y-fa*(AfterPoint.y-FirstPoint.y)
 373                                 },
 374                                 outer : {
 375                                         x: MiddlePoint.x+fb*(AfterPoint.x-FirstPoint.x),
 376                                         y : MiddlePoint.y+fb*(AfterPoint.y-FirstPoint.y)
 377                                 }
 378                         };
 379                 },
 380                 calculateOrderOfMagnitude = helpers.calculateOrderOfMagnitude = function(val){
 381                         return Math.floor(Math.log(val) / Math.LN10);
 382                 },
 383                 calculateScaleRange = helpers.calculateScaleRange = function(valuesArray, drawingSize, textSize, startFromZero, integersOnly){
 384
 385                         //Set a minimum step of two - a point at the top of the graph, and a point at the base
 386                         var minSteps = 2,
 387                                 maxSteps = Math.floor(drawingSize/(textSize * 1.5)),
 388                                 skipFitting = (minSteps >= maxSteps);
 389
 390                         var maxValue = max(valuesArray),
 391                                 minValue = min(valuesArray);
 392
 393                         // We need some degree of seperation here to calculate the scales if all the values are the same
 394                         // Adding/minusing 0.5 will give us a range of 1.
 395                         if (maxValue === minValue){
 396                                 maxValue += 0.5;
 397                                 // So we don't end up with a graph with a negative start value if we've said always start from zero
 398                                 if (minValue >= 0.5 && !startFromZero){
 399                                         minValue -= 0.5;
 400                                 }
 401                                 else{
 402                                         // Make up a whole number above the values
 403                                         maxValue += 0.5;
 404                                 }
 405                         }
 406
 407                         var     valueRange = Math.abs(maxValue - minValue),
 408                                 rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange),
 409                                 graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
 410                                 graphMin = (startFromZero) ? 0 : Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
 411                                 graphRange = graphMax - graphMin,
 412                                 stepValue = Math.pow(10, rangeOrderOfMagnitude),
 413                                 numberOfSteps = Math.round(graphRange / stepValue);
 414
 415                         //If we have more space on the graph we'll use it to give more definition to the data
 416                         while((numberOfSteps > maxSteps || (numberOfSteps * 2) < maxSteps) && !skipFitting) {
 417                                 if(numberOfSteps > maxSteps){
 418                                         stepValue *=2;
 419                                         numberOfSteps = Math.round(graphRange/stepValue);
 420                                         // Don't ever deal with a decimal number of steps - cancel fitting and just use the minimum number of steps.
 421                                         if (numberOfSteps % 1 !== 0){
 422                                                 skipFitting = true;
 423                                         }
 424                                 }
 425                                 //We can fit in double the amount of scale points on the scale
 426                                 else{
 427                                         //If user has declared ints only, and the step value isn't a decimal
 428                                         if (integersOnly && rangeOrderOfMagnitude >= 0){
 429                                                 //If the user has said integers only, we need to check that making the scale more granular wouldn't make it a float
 430                                                 if(stepValue/2 % 1 === 0){
 431                                                         stepValue /=2;
 432                                                         numberOfSteps = Math.round(graphRange/stepValue);
 433                                                 }
 434                                                 //If it would make it a float break out of the loop
 435                                                 else{
 436                                                         break;
 437                                                 }
 438                                         }
 439                                         //If the scale doesn't have to be an int, make the scale more granular anyway.
 440                                         else{
 441                                                 stepValue /=2;
 442                                                 numberOfSteps = Math.round(graphRange/stepValue);
 443                                         }
 444
 445                                 }
 446                         }
 447
 448                         if (skipFitting){
 449                                 numberOfSteps = minSteps;
 450                                 stepValue = graphRange / numberOfSteps;
 451                         }
 452
 453                         return {
 454                                 steps : numberOfSteps,
 455                                 stepValue : stepValue,
 456                                 min : graphMin,
 457                                 max     : graphMin + (numberOfSteps * stepValue)
 458                         };
 459
 460                 },
 461                 /* jshint ignore:start */
 462                 // Blows up jshint errors based on the new Function constructor
 463                 //Templating methods
 464                 //Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/
 465                 template = helpers.template = function(templateString, valuesObject){
 466
 467                         // If templateString is function rather than string-template - call the function for valuesObject
 468
 469                         if(templateString instanceof Function){
 470                                 return templateString(valuesObject);
 471                         }
 472
 473                         var cache = {};
 474                         function tmpl(str, data){
 475                                 // Figure out if we're getting a template, or if we need to
 476                                 // load the template - and be sure to cache the result.
 477                                 var fn = !/\W/.test(str) ?
 478                                 cache[str] = cache[str] :
 479
 480                                 // Generate a reusable function that will serve as a template
 481                                 // generator (and which will be cached).
 482                                 new Function("obj",
 483                                         "var p=[],print=function(){p.push.apply(p,arguments);};" +
 484
 485                                         // Introduce the data as local variables using with(){}
 486                                         "with(obj){p.push('" +
 487
 488                                         // Convert the template into pure JavaScript
 489                                         str
 490                                                 .replace(/[\r\t\n]/g, " ")
 491                                                 .split("<%").join("\t")
 492                                                 .replace(/((^|%>)[^\t]*)'/g, "$1\r")
 493                                                 .replace(/\t=(.*?)%>/g, "',$1,'")
 494                                                 .split("\t").join("');")
 495                                                 .split("%>").join("p.push('")
 496                                                 .split("\r").join("\\'") +
 497                                         "');}return p.join('');"
 498                                 );
 499
 500                                 // Provide some basic currying to the user
 501                                 return data ? fn( data ) : fn;
 502                         }
 503                         return tmpl(templateString,valuesObject);
 504                 },
 505                 /* jshint ignore:end */
 506                 generateLabels = helpers.generateLabels = function(templateString,numberOfSteps,graphMin,stepValue){
 507                         var labelsArray = new Array(numberOfSteps);
 508                         if (labelTemplateString){
 509                                 each(labelsArray,function(val,index){
 510                                         labelsArray[index] = template(templateString,{value: (graphMin + (stepValue*(index+1)))});
 511                                 });
 512                         }
 513                         return labelsArray;
 514                 },
 515                 //--Animation methods
 516                 //Easing functions adapted from Robert Penner's easing equations
 517                 //http://www.robertpenner.com/easing/
 518                 easingEffects = helpers.easingEffects = {
 519                         linear: function (t) {
 520                                 return t;
 521                         },
 522                         easeInQuad: function (t) {
 523                                 return t * t;
 524                         },
 525                         easeOutQuad: function (t) {
 526                                 return -1 * t * (t - 2);
 527                         },
 528                         easeInOutQuad: function (t) {
 529                                 if ((t /= 1 / 2) < 1) return 1 / 2 * t * t;
 530                                 return -1 / 2 * ((--t) * (t - 2) - 1);
 531                         },
 532                         easeInCubic: function (t) {
 533                                 return t * t * t;
 534                         },
 535                         easeOutCubic: function (t) {
 536                                 return 1 * ((t = t / 1 - 1) * t * t + 1);
 537                         },
 538                         easeInOutCubic: function (t) {
 539                                 if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t;
 540                                 return 1 / 2 * ((t -= 2) * t * t + 2);
 541                         },
 542                         easeInQuart: function (t) {
 543                                 return t * t * t * t;
 544                         },
 545                         easeOutQuart: function (t) {
 546                                 return -1 * ((t = t / 1 - 1) * t * t * t - 1);
 547                         },
 548                         easeInOutQuart: function (t) {
 549                                 if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t;
 550                                 return -1 / 2 * ((t -= 2) * t * t * t - 2);
 551                         },
 552                         easeInQuint: function (t) {
 553                                 return 1 * (t /= 1) * t * t * t * t;
 554                         },
 555                         easeOutQuint: function (t) {
 556                                 return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
 557                         },
 558                         easeInOutQuint: function (t) {
 559                                 if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t * t;
 560                                 return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
 561                         },
 562                         easeInSine: function (t) {
 563                                 return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
 564                         },
 565                         easeOutSine: function (t) {
 566                                 return 1 * Math.sin(t / 1 * (Math.PI / 2));
 567                         },
 568                         easeInOutSine: function (t) {
 569                                 return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
 570                         },
 571                         easeInExpo: function (t) {
 572                                 return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
 573                         },
 574                         easeOutExpo: function (t) {
 575                                 return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
 576                         },
 577                         easeInOutExpo: function (t) {
 578                                 if (t === 0) return 0;
 579                                 if (t === 1) return 1;
 580                                 if ((t /= 1 / 2) < 1) return 1 / 2 * Math.pow(2, 10 * (t - 1));
 581                                 return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
 582                         },
 583                         easeInCirc: function (t) {
 584                                 if (t >= 1) return t;
 585                                 return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
 586                         },
 587                         easeOutCirc: function (t) {
 588                                 return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
 589                         },
 590                         easeInOutCirc: function (t) {
 591                                 if ((t /= 1 / 2) < 1) return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
 592                                 return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
 593                         },
 594                         easeInElastic: function (t) {
 595                                 var s = 1.70158;
 596                                 var p = 0;
 597                                 var a = 1;
 598                                 if (t === 0) return 0;
 599                                 if ((t /= 1) == 1) return 1;
 600                                 if (!p) p = 1 * 0.3;
 601                                 if (a < Math.abs(1)) {
 602                                         a = 1;
 603                                         s = p / 4;
 604                                 } else s = p / (2 * Math.PI) * Math.asin(1 / a);
 605                                 return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
 606                         },
 607                         easeOutElastic: function (t) {
 608                                 var s = 1.70158;
 609                                 var p = 0;
 610                                 var a = 1;
 611                                 if (t === 0) return 0;
 612                                 if ((t /= 1) == 1) return 1;
 613                                 if (!p) p = 1 * 0.3;
 614                                 if (a < Math.abs(1)) {
 615                                         a = 1;
 616                                         s = p / 4;
 617                                 } else s = p / (2 * Math.PI) * Math.asin(1 / a);
 618                                 return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
 619                         },
 620                         easeInOutElastic: function (t) {
 621                                 var s = 1.70158;
 622                                 var p = 0;
 623                                 var a = 1;
 624                                 if (t === 0) return 0;
 625                                 if ((t /= 1 / 2) == 2) return 1;
 626                                 if (!p) p = 1 * (0.3 * 1.5);
 627                                 if (a < Math.abs(1)) {
 628                                         a = 1;
 629                                         s = p / 4;
 630                                 } else s = p / (2 * Math.PI) * Math.asin(1 / a);
 631                                 if (t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
 632                                 return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
 633                         },
 634                         easeInBack: function (t) {
 635                                 var s = 1.70158;
 636                                 return 1 * (t /= 1) * t * ((s + 1) * t - s);
 637                         },
 638                         easeOutBack: function (t) {
 639                                 var s = 1.70158;
 640                                 return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
 641                         },
 642                         easeInOutBack: function (t) {
 643                                 var s = 1.70158;
 644                                 if ((t /= 1 / 2) < 1) return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
 645                                 return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
 646                         },
 647                         easeInBounce: function (t) {
 648                                 return 1 - easingEffects.easeOutBounce(1 - t);
 649                         },
 650                         easeOutBounce: function (t) {
 651                                 if ((t /= 1) < (1 / 2.75)) {
 652                                         return 1 * (7.5625 * t * t);
 653                                 } else if (t < (2 / 2.75)) {
 654                                         return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
 655                                 } else if (t < (2.5 / 2.75)) {
 656                                         return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
 657                                 } else {
 658                                         return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
 659                                 }
 660                         },
 661                         easeInOutBounce: function (t) {
 662                                 if (t < 1 / 2) return easingEffects.easeInBounce(t * 2) * 0.5;
 663                                 return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
 664                         }
 665                 },
 666                 //Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
 667                 requestAnimFrame = helpers.requestAnimFrame = (function(){
 668                         return window.requestAnimationFrame ||
 669                                 window.webkitRequestAnimationFrame ||
 670                                 window.mozRequestAnimationFrame ||
 671                                 window.oRequestAnimationFrame ||
 672                                 window.msRequestAnimationFrame ||
 673                                 function(callback) {
 674                                         return window.setTimeout(callback, 1000 / 60);
 675                                 };
 676                 })(),
 677                 cancelAnimFrame = helpers.cancelAnimFrame = (function(){
 678                         return window.cancelAnimationFrame ||
 679                                 window.webkitCancelAnimationFrame ||
 680                                 window.mozCancelAnimationFrame ||
 681                                 window.oCancelAnimationFrame ||
 682                                 window.msCancelAnimationFrame ||
 683                                 function(callback) {
 684                                         return window.clearTimeout(callback, 1000 / 60);
 685                                 };
 686                 })(),
 687                 animationLoop = helpers.animationLoop = function(callback,totalSteps,easingString,onProgress,onComplete,chartInstance){
 688
 689                         var currentStep = 0,
 690                                 easingFunction = easingEffects[easingString] || easingEffects.linear;
 691
 692                         var animationFrame = function(){
 693                                 currentStep++;
 694                                 var stepDecimal = currentStep/totalSteps;
 695                                 var easeDecimal = easingFunction(stepDecimal);
 696
 697                                 callback.call(chartInstance,easeDecimal,stepDecimal, currentStep);
 698                                 onProgress.call(chartInstance,easeDecimal,stepDecimal);
 699                                 if (currentStep < totalSteps){
 700                                         chartInstance.animationFrame = requestAnimFrame(animationFrame);
 701                                 } else{
 702                                         onComplete.apply(chartInstance);
 703                                 }
 704                         };
 705                         requestAnimFrame(animationFrame);
 706                 },
 707                 //-- DOM methods
 708                 getRelativePosition = helpers.getRelativePosition = function(evt){
 709                         var mouseX, mouseY;
 710                         var e = evt.originalEvent || evt,
 711                                 canvas = evt.currentTarget || evt.srcElement,
 712                                 boundingRect = canvas.getBoundingClientRect();
 713
 714                         if (e.touches){
 715                                 mouseX = e.touches[0].clientX - boundingRect.left;
 716                                 mouseY = e.touches[0].clientY - boundingRect.top;
 717
 718                         }
 719                         else{
 720                                 mouseX = e.clientX - boundingRect.left;
 721                                 mouseY = e.clientY - boundingRect.top;
 722                         }
 723
 724                         return {
 725                                 x : mouseX,
 726                                 y : mouseY
 727                         };
 728
 729                 },
 730                 addEvent = helpers.addEvent = function(node,eventType,method){
 731                         if (node.addEventListener){
 732                                 node.addEventListener(eventType,method);
 733                         } else if (node.attachEvent){
 734                                 node.attachEvent("on"+eventType, method);
 735                         } else {
 736                                 node["on"+eventType] = method;
 737                         }
 738                 },
 739                 removeEvent = helpers.removeEvent = function(node, eventType, handler){
 740                         if (node.removeEventListener){
 741                                 node.removeEventListener(eventType, handler, false);
 742                         } else if (node.detachEvent){
 743                                 node.detachEvent("on"+eventType,handler);
 744                         } else{
 745                                 node["on" + eventType] = noop;
 746                         }
 747                 },
 748                 bindEvents = helpers.bindEvents = function(chartInstance, arrayOfEvents, handler){
 749                         // Create the events object if it's not already present
 750                         if (!chartInstance.events) chartInstance.events = {};
 751
 752                         each(arrayOfEvents,function(eventName){
 753                                 chartInstance.events[eventName] = function(){
 754                                         handler.apply(chartInstance, arguments);
 755                                 };
 756                                 addEvent(chartInstance.chart.canvas,eventName,chartInstance.events[eventName]);
 757                         });
 758                 },
 759                 unbindEvents = helpers.unbindEvents = function (chartInstance, arrayOfEvents) {
 760                         each(arrayOfEvents, function(handler,eventName){
 761                                 removeEvent(chartInstance.chart.canvas, eventName, handler);
 762                         });
 763                 },
 764                 getMaximumWidth = helpers.getMaximumWidth = function(domNode){
 765                         var container = domNode.parentNode;
 766                         // TODO = check cross browser stuff with this.
 767                         return container.clientWidth;
 768                 },
 769                 getMaximumHeight = helpers.getMaximumHeight = function(domNode){
 770                         var container = domNode.parentNode;
 771                         // TODO = check cross browser stuff with this.
 772                         return container.clientHeight;
 773                 },
 774                 getMaximumSize = helpers.getMaximumSize = helpers.getMaximumWidth, // legacy support
 775                 retinaScale = helpers.retinaScale = function(chart){
 776                         var ctx = chart.ctx,
 777                                 width = chart.canvas.width,
 778                                 height = chart.canvas.height;
 779
 780                         if (window.devicePixelRatio) {
 781                                 ctx.canvas.style.width = width + "px";
 782                                 ctx.canvas.style.height = height + "px";
 783                                 ctx.canvas.height = height * window.devicePixelRatio;
 784                                 ctx.canvas.width = width * window.devicePixelRatio;
 785                                 ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
 786                         }
 787                 },
 788                 //-- Canvas methods
 789                 clear = helpers.clear = function(chart){
 790                         chart.ctx.clearRect(0,0,chart.width,chart.height);
 791                 },
 792                 fontString = helpers.fontString = function(pixelSize,fontStyle,fontFamily){
 793                         return fontStyle + " " + pixelSize+"px " + fontFamily;
 794                 },
 795                 longestText = helpers.longestText = function(ctx,font,arrayOfStrings){
 796                         ctx.font = font;
 797                         var longest = 0;
 798                         each(arrayOfStrings,function(string){
 799                                 var textWidth = ctx.measureText(string).width;
 800                                 longest = (textWidth > longest) ? textWidth : longest;
 801                         });
 802                         return longest;
 803                 },
 804                 drawRoundedRectangle = helpers.drawRoundedRectangle = function(ctx,x,y,width,height,radius){
 805                         ctx.beginPath();
 806                         ctx.moveTo(x + radius, y);
 807                         ctx.lineTo(x + width - radius, y);
 808                         ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
 809                         ctx.lineTo(x + width, y + height - radius);
 810                         ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
 811                         ctx.lineTo(x + radius, y + height);
 812                         ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
 813                         ctx.lineTo(x, y + radius);
 814                         ctx.quadraticCurveTo(x, y, x + radius, y);
 815                         ctx.closePath();
 816                 };
 817
 818
 819         //Store a reference to each instance - allowing us to globally resize chart instances on window resize.
 820         //Destroy method on the chart will remove the instance of the chart from this reference.
 821         Chart.instances = {};
 822
 823         Chart.Type = function(data,options,chart){
 824                 this.options = options;
 825                 this.chart = chart;
 826                 this.id = uid();
 827                 //Add the chart instance to the global namespace
 828                 Chart.instances[this.id] = this;
 829
 830                 // Initialize is always called when a chart type is created
 831                 // By default it is a no op, but it should be extended
 832                 if (options.responsive){
 833                         this.resize();
 834                 }
 835                 this.initialize.call(this,data);
 836         };
 837
 838         //Core methods that'll be a part of every chart type
 839         extend(Chart.Type.prototype,{
 840                 initialize : function(){return this;},
 841                 clear : function(){
 842                         clear(this.chart);
 843                         return this;
 844                 },
 845                 stop : function(){
 846                         // Stops any current animation loop occuring
 847                         cancelAnimFrame(this.animationFrame);
 848                         return this;
 849                 },
 850                 resize : function(callback){
 851                         this.stop();
 852                         var canvas = this.chart.canvas,
 853                                 newWidth = getMaximumWidth(this.chart.canvas),
 854                                 newHeight = this.options.maintainAspectRatio ? newWidth / this.chart.aspectRatio : getMaximumHeight(this.chart.canvas);
 855
 856                         canvas.width = this.chart.width = newWidth;
 857                         canvas.height = this.chart.height = newHeight;
 858
 859                         retinaScale(this.chart);
 860
 861                         if (typeof callback === "function"){
 862                                 callback.apply(this, Array.prototype.slice.call(arguments, 1));
 863                         }
 864                         return this;
 865                 },
 866                 reflow : noop,
 867                 render : function(reflow){
 868                         if (reflow){
 869                                 this.reflow();
 870                         }
 871                         if (this.options.animation && !reflow){
 872                                 helpers.animationLoop(
 873                                         this.draw,
 874                                         this.options.animationSteps,
 875                                         this.options.animationEasing,
 876                                         this.options.onAnimationProgress,
 877                                         this.options.onAnimationComplete,
 878                                         this
 879                                 );
 880                         }
 881                         else{
 882                                 this.draw();
 883                                 this.options.onAnimationComplete.call(this);
 884                         }
 885                         return this;
 886                 },
 887                 generateLegend : function(){
 888                         return template(this.options.legendTemplate,this);
 889                 },
 890                 destroy : function(){
 891                         this.clear();
 892                         unbindEvents(this, this.events);
 893                         var canvas = this.chart.canvas;
 894
 895                         // Reset canvas height/width attributes starts a fresh with the canvas context
 896                         canvas.width = this.chart.width;
 897                         canvas.height = this.chart.height;
 898
 899                         // < IE9 doesn't support removeProperty
 900                         if (canvas.style.removeProperty) {
 901                                 canvas.style.removeProperty('width');
 902                                 canvas.style.removeProperty('height');
 903                         } else {
 904                                 canvas.style.removeAttribute('width');
 905                                 canvas.style.removeAttribute('height');
 906                         }
 907
 908                         delete Chart.instances[this.id];
 909                 },
 910                 showTooltip : function(ChartElements, forceRedraw){
 911                         // Only redraw the chart if we've actually changed what we're hovering on.
 912                         if (typeof this.activeElements === 'undefined') this.activeElements = [];
 913
 914                         var isChanged = (function(Elements){
 915                                 var changed = false;
 916
 917                                 if (Elements.length !== this.activeElements.length){
 918                                         changed = true;
 919                                         return changed;
 920                                 }
 921
 922                                 each(Elements, function(element, index){
 923                                         if (element !== this.activeElements[index]){
 924                                                 changed = true;
 925                                         }
 926                                 }, this);
 927                                 return changed;
 928                         }).call(this, ChartElements);
 929
 930                         if (!isChanged && !forceRedraw){
 931                                 return;
 932                         }
 933                         else{
 934                                 this.activeElements = ChartElements;
 935                         }
 936                         this.draw();
 937                         if(this.options.customTooltips){
 938                                 this.options.customTooltips(false);
 939                         }
 940                         if (ChartElements.length > 0){
 941                                 // If we have multiple datasets, show a MultiTooltip for all of the data points at that index
 942                                 if (this.datasets && this.datasets.length > 1) {
 943                                         var dataArray,
 944                                                 dataIndex;
 945
 946                                         for (var i = this.datasets.length - 1; i >= 0; i--) {
 947                                                 dataArray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
 948                                                 dataIndex = indexOf(dataArray, ChartElements[0]);
 949                                                 if (dataIndex !== -1){
 950                                                         break;
 951                                                 }
 952                                         }
 953                                         var tooltipLabels = [],
 954                                                 tooltipColors = [],
 955                                                 medianPosition = (function(index) {
 956
 957                                                         // Get all the points at that particular index
 958                                                         var Elements = [],
 959                                                                 dataCollection,
 960                                                                 xPositions = [],
 961                                                                 yPositions = [],
 962                                                                 xMax,
 963                                                                 yMax,
 964                                                                 xMin,
 965                                                                 yMin;
 966                                                         helpers.each(this.datasets, function(dataset){
 967                                                                 dataCollection = dataset.points || dataset.bars || dataset.segments;
 968                                                                 if (dataCollection[dataIndex] && dataCollection[dataIndex].hasValue()){
 969                                                                         Elements.push(dataCollection[dataIndex]);
 970                                                                 }
 971                                                         });
 972
 973                                                         helpers.each(Elements, function(element) {
 974                                                                 xPositions.push(element.x);
 975                                                                 yPositions.push(element.y);
 976
 977
 978                                                                 //Include any colour information about the element
 979                                                                 tooltipLabels.push(helpers.template(this.options.multiTooltipTemplate, element));
 980                                                                 tooltipColors.push({
 981                                                                         fill: element._saved.fillColor || element.fillColor,
 982                                                                         stroke: element._saved.strokeColor || element.strokeColor
 983                                                                 });
 984
 985                                                         }, this);
 986
 987                                                         yMin = min(yPositions);
 988                                                         yMax = max(yPositions);
 989
 990                                                         xMin = min(xPositions);
 991                                                         xMax = max(xPositions);
 992
 993                                                         return {
 994                                                                 x: (xMin > this.chart.width/2) ? xMin : xMax,
 995                                                                 y: (yMin + yMax)/2
 996                                                         };
 997                                                 }).call(this, dataIndex);
 998
 999                                         new Chart.MultiTooltip({
1000                                                 x: medianPosition.x,
1001                                                 y: medianPosition.y,
1002                                                 xPadding: this.options.tooltipXPadding,
1003                                                 yPadding: this.options.tooltipYPadding,
1004                                                 xOffset: this.options.tooltipXOffset,
1005                                                 fillColor: this.options.tooltipFillColor,
1006                                                 textColor: this.options.tooltipFontColor,
1007                                                 fontFamily: this.options.tooltipFontFamily,
1008                                                 fontStyle: this.options.tooltipFontStyle,
1009                                                 fontSize: this.options.tooltipFontSize,
1010                                                 titleTextColor: this.options.tooltipTitleFontColor,
1011                                                 titleFontFamily: this.options.tooltipTitleFontFamily,
1012                                                 titleFontStyle: this.options.tooltipTitleFontStyle,
1013                                                 titleFontSize: this.options.tooltipTitleFontSize,
1014                                                 cornerRadius: this.options.tooltipCornerRadius,
1015                                                 labels: tooltipLabels,
1016                                                 legendColors: tooltipColors,
1017                                                 legendColorBackground : this.options.multiTooltipKeyBackground,
1018                                                 title: ChartElements[0].label,
1019                                                 chart: this.chart,
1020                                                 ctx: this.chart.ctx,
1021                                                 custom: this.options.customTooltips
1022                                         }).draw();
1023
1024                                 } else {
1025                                         each(ChartElements, function(Element) {
1026                                                 var tooltipPosition = Element.tooltipPosition();
1027                                                 new Chart.Tooltip({
1028                                                         x: Math.round(tooltipPosition.x),
1029                                                         y: Math.round(tooltipPosition.y),
1030                                                         xPadding: this.options.tooltipXPadding,
1031                                                         yPadding: this.options.tooltipYPadding,
1032                                                         fillColor: this.options.tooltipFillColor,
1033                                                         textColor: this.options.tooltipFontColor,
1034                                                         fontFamily: this.options.tooltipFontFamily,
1035                                                         fontStyle: this.options.tooltipFontStyle,
1036                                                         fontSize: this.options.tooltipFontSize,
1037                                                         caretHeight: this.options.tooltipCaretSize,
1038                                                         cornerRadius: this.options.tooltipCornerRadius,
1039                                                         text: template(this.options.tooltipTemplate, Element),
1040                                                         chart: this.chart,
1041                                                         custom: this.options.customTooltips
1042                                                 }).draw();
1043                                         }, this);
1044                                 }
1045                         }
1046                         return this;
1047                 },
1048                 toBase64Image : function(){
1049                         return this.chart.canvas.toDataURL.apply(this.chart.canvas, arguments);
1050                 }
1051         });
1052
1053         Chart.Type.extend = function(extensions){
1054
1055                 var parent = this;
1056
1057                 var ChartType = function(){
1058                         return parent.apply(this,arguments);
1059                 };
1060
1061                 //Copy the prototype object of the this class
1062                 ChartType.prototype = clone(parent.prototype);
1063                 //Now overwrite some of the properties in the base class with the new extensions
1064                 extend(ChartType.prototype, extensions);
1065
1066                 ChartType.extend = Chart.Type.extend;
1067
1068                 if (extensions.name || parent.prototype.name){
1069
1070                         var chartName = extensions.name || parent.prototype.name;
1071                         //Assign any potential default values of the new chart type
1072
1073                         //If none are defined, we'll use a clone of the chart type this is being extended from.
1074                         //I.e. if we extend a line chart, we'll use the defaults from the line chart if our new chart
1075                         //doesn't define some defaults of their own.
1076
1077                         var baseDefaults = (Chart.defaults[parent.prototype.name]) ? clone(Chart.defaults[parent.prototype.name]) : {};
1078
1079                         Chart.defaults[chartName] = extend(baseDefaults,extensions.defaults);
1080
1081                         Chart.types[chartName] = ChartType;
1082
1083                         //Register this new chart type in the Chart prototype
1084                         Chart.prototype[chartName] = function(data,options){
1085                                 var config = merge(Chart.defaults.global, Chart.defaults[chartName], options || {});
1086                                 return new ChartType(data,config,this);
1087                         };
1088                 } else{
1089                         warn("Name not provided for this chart, so it hasn't been registered");
1090                 }
1091                 return parent;
1092         };
1093
1094         Chart.Element = function(configuration){
1095                 extend(this,configuration);
1096                 this.initialize.apply(this,arguments);
1097                 this.save();
1098         };
1099         extend(Chart.Element.prototype,{
1100                 initialize : function(){},
1101                 restore : function(props){
1102                         if (!props){
1103                                 extend(this,this._saved);
1104                         } else {
1105                                 each(props,function(key){
1106                                         this[key] = this._saved[key];
1107                                 },this);
1108                         }
1109                         return this;
1110                 },
1111                 save : function(){
1112                         this._saved = clone(this);
1113                         delete this._saved._saved;
1114                         return this;
1115                 },
1116                 update : function(newProps){
1117                         each(newProps,function(value,key){
1118                                 this._saved[key] = this[key];
1119                                 this[key] = value;
1120                         },this);
1121                         return this;
1122                 },
1123                 transition : function(props,ease){
1124                         each(props,function(value,key){
1125                                 this[key] = ((value - this._saved[key]) * ease) + this._saved[key];
1126                         },this);
1127                         return this;
1128                 },
1129                 tooltipPosition : function(){
1130                         return {
1131                                 x : this.x,
1132                                 y : this.y
1133                         };
1134                 },
1135                 hasValue: function(){
1136                         return isNumber(this.value);
1137                 }
1138         });
1139
1140         Chart.Element.extend = inherits;
1141
1142
1143         Chart.Point = Chart.Element.extend({
1144                 display: true,
1145                 inRange: function(chartX,chartY){
1146                         var hitDetectionRange = this.hitDetectionRadius + this.radius;
1147                         return ((Math.pow(chartX-this.x, 2)+Math.pow(chartY-this.y, 2)) < Math.pow(hitDetectionRange,2));
1148                 },
1149                 draw : function(){
1150                         if (this.display){
1151                                 var ctx = this.ctx;
1152                                 ctx.beginPath();
1153
1154                                 ctx.arc(this.x, this.y, this.radius, 0, Math.PI*2);
1155                                 ctx.closePath();
1156
1157                                 ctx.strokeStyle = this.strokeColor;
1158                                 ctx.lineWidth = this.strokeWidth;
1159
1160                                 ctx.fillStyle = this.fillColor;
1161
1162                                 ctx.fill();
1163                                 ctx.stroke();
1164                         }
1165
1166
1167                         //Quick debug for bezier curve splining
1168                         //Highlights control points and the line between them.
1169                         //Handy for dev - stripped in the min version.
1170
1171                         // ctx.save();
1172                         // ctx.fillStyle = "black";
1173                         // ctx.strokeStyle = "black"
1174                         // ctx.beginPath();
1175                         // ctx.arc(this.controlPoints.inner.x,this.controlPoints.inner.y, 2, 0, Math.PI*2);
1176                         // ctx.fill();
1177
1178                         // ctx.beginPath();
1179                         // ctx.arc(this.controlPoints.outer.x,this.controlPoints.outer.y, 2, 0, Math.PI*2);
1180                         // ctx.fill();
1181
1182                         // ctx.moveTo(this.controlPoints.inner.x,this.controlPoints.inner.y);
1183                         // ctx.lineTo(this.x, this.y);
1184                         // ctx.lineTo(this.controlPoints.outer.x,this.controlPoints.outer.y);
1185                         // ctx.stroke();
1186
1187                         // ctx.restore();
1188
1189
1190
1191                 }
1192         });
1193
1194         Chart.Arc = Chart.Element.extend({
1195                 inRange : function(chartX,chartY){
1196
1197                         var pointRelativePosition = helpers.getAngleFromPoint(this, {
1198                                 x: chartX,
1199                                 y: chartY
1200                         });
1201
1202                         //Check if within the range of the open/close angle
1203                         var betweenAngles = (pointRelativePosition.angle >= this.startAngle && pointRelativePosition.angle <= this.endAngle),
1204                                 withinRadius = (pointRelativePosition.distance >= this.innerRadius && pointRelativePosition.distance <= this.outerRadius);
1205
1206                         return (betweenAngles && withinRadius);
1207                         //Ensure within the outside of the arc centre, but inside arc outer
1208                 },
1209                 tooltipPosition : function(){
1210                         var centreAngle = this.startAngle + ((this.endAngle - this.startAngle) / 2),
1211                                 rangeFromCentre = (this.outerRadius - this.innerRadius) / 2 + this.innerRadius;
1212                         return {
1213                                 x : this.x + (Math.cos(centreAngle) * rangeFromCentre),
1214                                 y : this.y + (Math.sin(centreAngle) * rangeFromCentre)
1215                         };
1216                 },
1217                 draw : function(animationPercent){
1218
1219                         var easingDecimal = animationPercent || 1;
1220
1221                         var ctx = this.ctx;
1222
1223                         ctx.beginPath();
1224
1225                         ctx.arc(this.x, this.y, this.outerRadius, this.startAngle, this.endAngle);
1226
1227                         ctx.arc(this.x, this.y, this.innerRadius, this.endAngle, this.startAngle, true);
1228
1229                         ctx.closePath();
1230                         ctx.strokeStyle = this.strokeColor;
1231                         ctx.lineWidth = this.strokeWidth;
1232
1233                         ctx.fillStyle = this.fillColor;
1234
1235                         ctx.fill();
1236                         ctx.lineJoin = 'bevel';
1237
1238                         if (this.showStroke){
1239                                 ctx.stroke();
1240                         }
1241                 }
1242         });
1243
1244         Chart.Rectangle = Chart.Element.extend({
1245                 draw : function(){
1246                         var ctx = this.ctx,
1247                                 halfWidth = this.width/2,
1248                                 leftX = this.x - halfWidth,
1249                                 rightX = this.x + halfWidth,
1250                                 top = this.base - (this.base - this.y),
1251                                 halfStroke = this.strokeWidth / 2;
1252
1253                         // Canvas doesn't allow us to stroke inside the width so we can
1254                         // adjust the sizes to fit if we're setting a stroke on the line
1255                         if (this.showStroke){
1256                                 leftX += halfStroke;
1257                                 rightX -= halfStroke;
1258                                 top += halfStroke;
1259                         }
1260
1261                         ctx.beginPath();
1262
1263                         ctx.fillStyle = this.fillColor;
1264                         ctx.strokeStyle = this.strokeColor;
1265                         ctx.lineWidth = this.strokeWidth;
1266
1267                         // It'd be nice to keep this class totally generic to any rectangle
1268                         // and simply specify which border to miss out.
1269                         ctx.moveTo(leftX, this.base);
1270                         ctx.lineTo(leftX, top);
1271                         ctx.lineTo(rightX, top);
1272                         ctx.lineTo(rightX, this.base);
1273                         ctx.fill();
1274                         if (this.showStroke){
1275                                 ctx.stroke();
1276                         }
1277                 },
1278                 height : function(){
1279                         return this.base - this.y;
1280                 },
1281                 inRange : function(chartX,chartY){
1282                         return (chartX >= this.x - this.width/2 && chartX <= this.x + this.width/2) && (chartY >= this.y && chartY <= this.base);
1283                 }
1284         });
1285
1286         Chart.Tooltip = Chart.Element.extend({
1287                 draw : function(){
1288
1289                         var ctx = this.chart.ctx;
1290
1291                         ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
1292
1293                         this.xAlign = "center";
1294                         this.yAlign = "above";
1295
1296                         //Distance between the actual element.y position and the start of the tooltip caret
1297                         var caretPadding = this.caretPadding = 2;
1298
1299                         var tooltipWidth = ctx.measureText(this.text).width + 2*this.xPadding,
1300                                 tooltipRectHeight = this.fontSize + 2*this.yPadding,
1301                                 tooltipHeight = tooltipRectHeight + this.caretHeight + caretPadding;
1302
1303                         if (this.x + tooltipWidth/2 >this.chart.width){
1304                                 this.xAlign = "left";
1305                         } else if (this.x - tooltipWidth/2 < 0){
1306                                 this.xAlign = "right";
1307                         }
1308
1309                         if (this.y - tooltipHeight < 0){
1310                                 this.yAlign = "below";
1311                         }
1312
1313
1314                         var tooltipX = this.x - tooltipWidth/2,
1315                                 tooltipY = this.y - tooltipHeight;
1316
1317                         ctx.fillStyle = this.fillColor;
1318
1319                         // Custom Tooltips
1320                         if(this.custom){
1321                                 this.custom(this);
1322                         }
1323                         else{
1324                                 switch(this.yAlign)
1325                                 {
1326                                 case "above":
1327                                         //Draw a caret above the x/y
1328                                         ctx.beginPath();
1329                                         ctx.moveTo(this.x,this.y - caretPadding);
1330                                         ctx.lineTo(this.x + this.caretHeight, this.y - (caretPadding + this.caretHeight));
1331                                         ctx.lineTo(this.x - this.caretHeight, this.y - (caretPadding + this.caretHeight));
1332                                         ctx.closePath();
1333                                         ctx.fill();
1334                                         break;
1335                                 case "below":
1336                                         tooltipY = this.y + caretPadding + this.caretHeight;
1337                                         //Draw a caret below the x/y
1338                                         ctx.beginPath();
1339                                         ctx.moveTo(this.x, this.y + caretPadding);
1340                                         ctx.lineTo(this.x + this.caretHeight, this.y + caretPadding + this.caretHeight);
1341                                         ctx.lineTo(this.x - this.caretHeight, this.y + caretPadding + this.caretHeight);
1342                                         ctx.closePath();
1343                                         ctx.fill();
1344                                         break;
1345                                 }
1346
1347                                 switch(this.xAlign)
1348                                 {
1349                                 case "left":
1350                                         tooltipX = this.x - tooltipWidth + (this.cornerRadius + this.caretHeight);
1351                                         break;
1352                                 case "right":
1353                                         tooltipX = this.x - (this.cornerRadius + this.caretHeight);
1354                                         break;
1355                                 }
1356
1357                                 drawRoundedRectangle(ctx,tooltipX,tooltipY,tooltipWidth,tooltipRectHeight,this.cornerRadius);
1358
1359                                 ctx.fill();
1360
1361                                 ctx.fillStyle = this.textColor;
1362                                 ctx.textAlign = "center";
1363                                 ctx.textBaseline = "middle";
1364                                 ctx.fillText(this.text, tooltipX + tooltipWidth/2, tooltipY + tooltipRectHeight/2);
1365                         }
1366                 }
1367         });
1368
1369         Chart.MultiTooltip = Chart.Element.extend({
1370                 initialize : function(){
1371                         this.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
1372
1373                         this.titleFont = fontString(this.titleFontSize,this.titleFontStyle,this.titleFontFamily);
1374
1375                         this.height = (this.labels.length * this.fontSize) + ((this.labels.length-1) * (this.fontSize/2)) + (this.yPadding*2) + this.titleFontSize *1.5;
1376
1377                         this.ctx.font = this.titleFont;
1378
1379                         var titleWidth = this.ctx.measureText(this.title).width,
1380                                 //Label has a legend square as well so account for this.
1381                                 labelWidth = longestText(this.ctx,this.font,this.labels) + this.fontSize + 3,
1382                                 longestTextWidth = max([labelWidth,titleWidth]);
1383
1384                         this.width = longestTextWidth + (this.xPadding*2);
1385
1386
1387                         var halfHeight = this.height/2;
1388
1389                         //Check to ensure the height will fit on the canvas
1390                         if (this.y - halfHeight < 0 ){
1391                                 this.y = halfHeight;
1392                         } else if (this.y + halfHeight > this.chart.height){
1393                                 this.y = this.chart.height - halfHeight;
1394                         }
1395
1396                         //Decide whether to align left or right based on position on canvas
1397                         if (this.x > this.chart.width/2){
1398                                 this.x -= this.xOffset + this.width;
1399                         } else {
1400                                 this.x += this.xOffset;
1401                         }
1402
1403
1404                 },
1405                 getLineHeight : function(index){
1406                         var baseLineHeight = this.y - (this.height/2) + this.yPadding,
1407                                 afterTitleIndex = index-1;
1408
1409                         //If the index is zero, we're getting the title
1410                         if (index === 0){
1411                                 return baseLineHeight + this.titleFontSize/2;
1412                         } else{
1413                                 return baseLineHeight + ((this.fontSize*1.5*afterTitleIndex) + this.fontSize/2) + this.titleFontSize * 1.5;
1414                         }
1415
1416                 },
1417                 draw : function(){
1418                         // Custom Tooltips
1419                         if(this.custom){
1420                                 this.custom(this);
1421                         }
1422                         else{
1423                                 drawRoundedRectangle(this.ctx,this.x,this.y - this.height/2,this.width,this.height,this.cornerRadius);
1424                                 var ctx = this.ctx;
1425                                 ctx.fillStyle = this.fillColor;
1426                                 ctx.fill();
1427                                 ctx.closePath();
1428
1429                                 ctx.textAlign = "left";
1430                                 ctx.textBaseline = "middle";
1431                                 ctx.fillStyle = this.titleTextColor;
1432                                 ctx.font = this.titleFont;
1433
1434                                 ctx.fillText(this.title,this.x + this.xPadding, this.getLineHeight(0));
1435
1436                                 ctx.font = this.font;
1437                                 helpers.each(this.labels,function(label,index){
1438                                         ctx.fillStyle = this.textColor;
1439                                         ctx.fillText(label,this.x + this.xPadding + this.fontSize + 3, this.getLineHeight(index + 1));
1440
1441                                         //A bit gnarly, but clearing this rectangle breaks when using explorercanvas (clears whole canvas)
1442                                         //ctx.clearRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
1443                                         //Instead we'll make a white filled block to put the legendColour palette over.
1444
1445                                         ctx.fillStyle = this.legendColorBackground;
1446                                         ctx.fillRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
1447
1448                                         ctx.fillStyle = this.legendColors[index].fill;
1449                                         ctx.fillRect(this.x + this.xPadding, this.getLineHeight(index + 1) - this.fontSize/2, this.fontSize, this.fontSize);
1450
1451
1452                                 },this);
1453                         }
1454                 }
1455         });
1456
1457         Chart.Scale = Chart.Element.extend({
1458                 initialize : function(){
1459                         this.fit();
1460                 },
1461                 buildYLabels : function(){
1462                         this.yLabels = [];
1463
1464                         var stepDecimalPlaces = getDecimalPlaces(this.stepValue);
1465
1466                         for (var i=0; i<=this.steps; i++){
1467                                 this.yLabels.push(template(this.templateString,{value:(this.min + (i * this.stepValue)).toFixed(stepDecimalPlaces)}));
1468                         }
1469                         this.yLabelWidth = (this.display && this.showLabels) ? longestText(this.ctx,this.font,this.yLabels) : 0;
1470                 },
1471                 addXLabel : function(label){
1472                         this.xLabels.push(label);
1473                         this.valuesCount++;
1474                         this.fit();
1475                 },
1476                 removeXLabel : function(){
1477                         this.xLabels.shift();
1478                         this.valuesCount--;
1479                         this.fit();
1480                 },
1481                 // Fitting loop to rotate x Labels and figure out what fits there, and also calculate how many Y steps to use
1482                 fit: function(){
1483                         // First we need the width of the yLabels, assuming the xLabels aren't rotated
1484
1485                         // To do that we need the base line at the top and base of the chart, assuming there is no x label rotation
1486                         this.startPoint = (this.display) ? this.fontSize : 0;
1487                         this.endPoint = (this.display) ? this.height - (this.fontSize * 1.5) - 5 : this.height; // -5 to pad labels
1488
1489                         // Apply padding settings to the start and end point.
1490                         this.startPoint += this.padding;
1491                         this.endPoint -= this.padding;
1492
1493                         // Cache the starting height, so can determine if we need to recalculate the scale yAxis
1494                         var cachedHeight = this.endPoint - this.startPoint,
1495                                 cachedYLabelWidth;
1496
1497                         // Build the current yLabels so we have an idea of what size they'll be to start
1498                         /*
1499                          *      This sets what is returned from calculateScaleRange as static properties of this class:
1500                          *
1501                                 this.steps;
1502                                 this.stepValue;
1503                                 this.min;
1504                                 this.max;
1505                          *
1506                          */
1507                         this.calculateYRange(cachedHeight);
1508
1509                         // With these properties set we can now build the array of yLabels
1510                         // and also the width of the largest yLabel
1511                         this.buildYLabels();
1512
1513                         this.calculateXLabelRotation();
1514
1515                         while((cachedHeight > this.endPoint - this.startPoint)){
1516                                 cachedHeight = this.endPoint - this.startPoint;
1517                                 cachedYLabelWidth = this.yLabelWidth;
1518
1519                                 this.calculateYRange(cachedHeight);
1520                                 this.buildYLabels();
1521
1522                                 // Only go through the xLabel loop again if the yLabel width has changed
1523                                 if (cachedYLabelWidth < this.yLabelWidth){
1524                                         this.calculateXLabelRotation();
1525                                 }
1526                         }
1527
1528                 },
1529                 calculateXLabelRotation : function(){
1530                         //Get the width of each grid by calculating the difference
1531                         //between x offsets between 0 and 1.
1532
1533                         this.ctx.font = this.font;
1534
1535                         var firstWidth = this.ctx.measureText(this.xLabels[0]).width,
1536                                 lastWidth = this.ctx.measureText(this.xLabels[this.xLabels.length - 1]).width,
1537                                 firstRotated,
1538                                 lastRotated;
1539
1540
1541                         this.xScalePaddingRight = lastWidth/2 + 3;
1542                         this.xScalePaddingLeft = (firstWidth/2 > this.yLabelWidth + 10) ? firstWidth/2 : this.yLabelWidth + 10;
1543
1544                         this.xLabelRotation = 0;
1545                         if (this.display){
1546                                 var originalLabelWidth = longestText(this.ctx,this.font,this.xLabels),
1547                                         cosRotation,
1548                                         firstRotatedWidth;
1549                                 this.xLabelWidth = originalLabelWidth;
1550                                 //Allow 3 pixels x2 padding either side for label readability
1551                                 var xGridWidth = Math.floor(this.calculateX(1) - this.calculateX(0)) - 6;
1552
1553                                 //Max label rotate should be 90 - also act as a loop counter
1554                                 while ((this.xLabelWidth > xGridWidth && this.xLabelRotation === 0) || (this.xLabelWidth > xGridWidth && this.xLabelRotation <= 90 && this.xLabelRotation > 0)){
1555                                         cosRotation = Math.cos(toRadians(this.xLabelRotation));
1556
1557                                         firstRotated = cosRotation * firstWidth;
1558                                         lastRotated = cosRotation * lastWidth;
1559
1560                                         // We're right aligning the text now.
1561                                         if (firstRotated + this.fontSize / 2 > this.yLabelWidth + 8){
1562                                                 this.xScalePaddingLeft = firstRotated + this.fontSize / 2;
1563                                         }
1564                                         this.xScalePaddingRight = this.fontSize/2;
1565
1566
1567                                         this.xLabelRotation++;
1568                                         this.xLabelWidth = cosRotation * originalLabelWidth;
1569
1570                                 }
1571                                 if (this.xLabelRotation > 0){
1572                                         this.endPoint -= Math.sin(toRadians(this.xLabelRotation))*originalLabelWidth + 3;
1573                                 }
1574                         }
1575                         else{
1576                                 this.xLabelWidth = 0;
1577                                 this.xScalePaddingRight = this.padding;
1578                                 this.xScalePaddingLeft = this.padding;
1579                         }
1580
1581                 },
1582                 // Needs to be overidden in each Chart type
1583                 // Otherwise we need to pass all the data into the scale class
1584                 calculateYRange: noop,
1585                 drawingArea: function(){
1586                         return this.startPoint - this.endPoint;
1587                 },
1588                 calculateY : function(value){
1589                         var scalingFactor = this.drawingArea() / (this.min - this.max);
1590                         return this.endPoint - (scalingFactor * (value - this.min));
1591                 },
1592                 calculateX : function(index){
1593                         var isRotated = (this.xLabelRotation > 0),
1594                                 // innerWidth = (this.offsetGridLines) ? this.width - offsetLeft - this.padding : this.width - (offsetLeft + halfLabelWidth * 2) - this.padding,
1595                                 innerWidth = this.width - (this.xScalePaddingLeft + this.xScalePaddingRight),
1596                                 valueWidth = innerWidth/Math.max((this.valuesCount - ((this.offsetGridLines) ? 0 : 1)), 1),
1597                                 valueOffset = (valueWidth * index) + this.xScalePaddingLeft;
1598
1599                         if (this.offsetGridLines){
1600                                 valueOffset += (valueWidth/2);
1601                         }
1602
1603                         return Math.round(valueOffset);
1604                 },
1605                 update : function(newProps){
1606                         helpers.extend(this, newProps);
1607                         this.fit();
1608                 },
1609                 draw : function(){
1610                         var ctx = this.ctx,
1611                                 yLabelGap = (this.endPoint - this.startPoint) / this.steps,
1612                                 xStart = Math.round(this.xScalePaddingLeft);
1613                         if (this.display){
1614                                 ctx.fillStyle = this.textColor;
1615                                 ctx.font = this.font;
1616                                 each(this.yLabels,function(labelString,index){
1617                                         var yLabelCenter = this.endPoint - (yLabelGap * index),
1618                                                 linePositionY = Math.round(yLabelCenter),
1619                                                 drawHorizontalLine = this.showHorizontalLines;
1620
1621                                         ctx.textAlign = "right";
1622                                         ctx.textBaseline = "middle";
1623                                         if (this.showLabels){
1624                                                 ctx.fillText(labelString,xStart - 10,yLabelCenter);
1625                                         }
1626
1627                                         // This is X axis, so draw it
1628                                         if (index === 0 && !drawHorizontalLine){
1629                                                 drawHorizontalLine = true;
1630                                         }
1631
1632                                         if (drawHorizontalLine){
1633                                                 ctx.beginPath();
1634                                         }
1635
1636                                         if (index > 0){
1637                                                 // This is a grid line in the centre, so drop that
1638                                                 ctx.lineWidth = this.gridLineWidth;
1639                                                 ctx.strokeStyle = this.gridLineColor;
1640                                         } else {
1641                                                 // This is the first line on the scale
1642                                                 ctx.lineWidth = this.lineWidth;
1643                                                 ctx.strokeStyle = this.lineColor;
1644                                         }
1645
1646                                         linePositionY += helpers.aliasPixel(ctx.lineWidth);
1647
1648                                         if(drawHorizontalLine){
1649                                                 ctx.moveTo(xStart, linePositionY);
1650                                                 ctx.lineTo(this.width, linePositionY);
1651                                                 ctx.stroke();
1652                                                 ctx.closePath();
1653                                         }
1654
1655                                         ctx.lineWidth = this.lineWidth;
1656                                         ctx.strokeStyle = this.lineColor;
1657                                         ctx.beginPath();
1658                                         ctx.moveTo(xStart - 5, linePositionY);
1659                                         ctx.lineTo(xStart, linePositionY);
1660                                         ctx.stroke();
1661                                         ctx.closePath();
1662
1663                                 },this);
1664
1665                                 each(this.xLabels,function(label,index){
1666                                         var xPos = this.calculateX(index) + aliasPixel(this.lineWidth),
1667                                                 // Check to see if line/bar here and decide where to place the line
1668                                                 linePos = this.calculateX(index - (this.offsetGridLines ? 0.5 : 0)) + aliasPixel(this.lineWidth),
1669                                                 isRotated = (this.xLabelRotation > 0),
1670                                                 drawVerticalLine = this.showVerticalLines;
1671
1672                                         // This is Y axis, so draw it
1673                                         if (index === 0 && !drawVerticalLine){
1674                                                 drawVerticalLine = true;
1675                                         }
1676
1677                                         if (drawVerticalLine){
1678                                                 ctx.beginPath();
1679                                         }
1680
1681                                         if (index > 0){
1682                                                 // This is a grid line in the centre, so drop that
1683                                                 ctx.lineWidth = this.gridLineWidth;
1684                                                 ctx.strokeStyle = this.gridLineColor;
1685                                         } else {
1686                                                 // This is the first line on the scale
1687                                                 ctx.lineWidth = this.lineWidth;
1688                                                 ctx.strokeStyle = this.lineColor;
1689                                         }
1690
1691                                         if (drawVerticalLine){
1692                                                 ctx.moveTo(linePos,this.endPoint);
1693                                                 ctx.lineTo(linePos,this.startPoint - 3);
1694                                                 ctx.stroke();
1695                                                 ctx.closePath();
1696                                         }
1697
1698
1699                                         ctx.lineWidth = this.lineWidth;
1700                                         ctx.strokeStyle = this.lineColor;
1701
1702
1703                                         // Small lines at the bottom of the base grid line
1704                                         ctx.beginPath();
1705                                         ctx.moveTo(linePos,this.endPoint);
1706                                         ctx.lineTo(linePos,this.endPoint + 5);
1707                                         ctx.stroke();
1708                                         ctx.closePath();
1709
1710                                         ctx.save();
1711                                         ctx.translate(xPos,(isRotated) ? this.endPoint + 12 : this.endPoint + 8);
1712                                         ctx.rotate(toRadians(this.xLabelRotation)*-1);
1713                                         ctx.font = this.font;
1714                                         ctx.textAlign = (isRotated) ? "right" : "center";
1715                                         ctx.textBaseline = (isRotated) ? "middle" : "top";
1716                                         ctx.fillText(label, 0, 0);
1717                                         ctx.restore();
1718                                 },this);
1719
1720                         }
1721                 }
1722
1723         });
1724
1725         Chart.RadialScale = Chart.Element.extend({
1726                 initialize: function(){
1727                         this.size = min([this.height, this.width]);
1728                         this.drawingArea = (this.display) ? (this.size/2) - (this.fontSize/2 + this.backdropPaddingY) : (this.size/2);
1729                 },
1730                 calculateCenterOffset: function(value){
1731                         // Take into account half font size + the yPadding of the top value
1732                         var scalingFactor = this.drawingArea / (this.max - this.min);
1733
1734                         return (value - this.min) * scalingFactor;
1735                 },
1736                 update : function(){
1737                         if (!this.lineArc){
1738                                 this.setScaleSize();
1739                         } else {
1740                                 this.drawingArea = (this.display) ? (this.size/2) - (this.fontSize/2 + this.backdropPaddingY) : (this.size/2);
1741                         }
1742                         this.buildYLabels();
1743                 },
1744                 buildYLabels: function(){
1745                         this.yLabels = [];
1746
1747                         var stepDecimalPlaces = getDecimalPlaces(this.stepValue);
1748
1749                         for (var i=0; i<=this.steps; i++){
1750                                 this.yLabels.push(template(this.templateString,{value:(this.min + (i * this.stepValue)).toFixed(stepDecimalPlaces)}));
1751                         }
1752                 },
1753                 getCircumference : function(){
1754                         return ((Math.PI*2) / this.valuesCount);
1755                 },
1756                 setScaleSize: function(){
1757                         /*
1758                          * Right, this is really confusing and there is a lot of maths going on here
1759                          * The gist of the problem is here: https://gist.github.com/nnnick/696cc9c55f4b0beb8fe9
1760                          *
1761                          * Reaction: https://dl.dropboxusercontent.com/u/34601363/toomuchscience.gif
1762                          *
1763                          * Solution:
1764                          *
1765                          * We assume the radius of the polygon is half the size of the canvas at first
1766                          * at each index we check if the text overlaps.
1767                          *
1768                          * Where it does, we store that angle and that index.
1769                          *
1770                          * After finding the largest index and angle we calculate how much we need to remove
1771                          * from the shape radius to move the point inwards by that x.
1772                          *
1773                          * We average the left and right distances to get the maximum shape radius that can fit in the box
1774                          * along with labels.
1775                          *
1776                          * Once we have that, we can find the centre point for the chart, by taking the x text protrusion
1777                          * on each side, removing that from the size, halving it and adding the left x protrusion width.
1778                          *
1779                          * This will mean we have a shape fitted to the canvas, as large as it can be with the labels
1780                          * and position it in the most space efficient manner
1781                          *
1782                          * https://dl.dropboxusercontent.com/u/34601363/yeahscience.gif
1783                          */
1784
1785
1786                         // Get maximum radius of the polygon. Either half the height (minus the text width) or half the width.
1787                         // Use this to calculate the offset + change. - Make sure L/R protrusion is at least 0 to stop issues with centre points
1788                         var largestPossibleRadius = min([(this.height/2 - this.pointLabelFontSize - 5), this.width/2]),
1789                                 pointPosition,
1790                                 i,
1791                                 textWidth,
1792                                 halfTextWidth,
1793                                 furthestRight = this.width,
1794                                 furthestRightIndex,
1795                                 furthestRightAngle,
1796                                 furthestLeft = 0,
1797                                 furthestLeftIndex,
1798                                 furthestLeftAngle,
1799                                 xProtrusionLeft,
1800                                 xProtrusionRight,
1801                                 radiusReductionRight,
1802                                 radiusReductionLeft,
1803                                 maxWidthRadius;
1804                         this.ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily);
1805                         for (i=0;i<this.valuesCount;i++){
1806                                 // 5px to space the text slightly out - similar to what we do in the draw function.
1807                                 pointPosition = this.getPointPosition(i, largestPossibleRadius);
1808                                 textWidth = this.ctx.measureText(template(this.templateString, { value: this.labels[i] })).width + 5;
1809                                 if (i === 0 || i === this.valuesCount/2){
1810                                         // If we're at index zero, or exactly the middle, we're at exactly the top/bottom
1811                                         // of the radar chart, so text will be aligned centrally, so we'll half it and compare
1812                                         // w/left and right text sizes
1813                                         halfTextWidth = textWidth/2;
1814                                         if (pointPosition.x + halfTextWidth > furthestRight) {
1815                                                 furthestRight = pointPosition.x + halfTextWidth;
1816                                                 furthestRightIndex = i;
1817                                         }
1818                                         if (pointPosition.x - halfTextWidth < furthestLeft) {
1819                                                 furthestLeft = pointPosition.x - halfTextWidth;
1820                                                 furthestLeftIndex = i;
1821                                         }
1822                                 }
1823                                 else if (i < this.valuesCount/2) {
1824                                         // Less than half the values means we'll left align the text
1825                                         if (pointPosition.x + textWidth > furthestRight) {
1826                                                 furthestRight = pointPosition.x + textWidth;
1827                                                 furthestRightIndex = i;
1828                                         }
1829                                 }
1830                                 else if (i > this.valuesCount/2){
1831                                         // More than half the values means we'll right align the text
1832                                         if (pointPosition.x - textWidth < furthestLeft) {
1833                                                 furthestLeft = pointPosition.x - textWidth;
1834                                                 furthestLeftIndex = i;
1835                                         }
1836                                 }
1837                         }
1838
1839                         xProtrusionLeft = furthestLeft;
1840
1841                         xProtrusionRight = Math.ceil(furthestRight - this.width);
1842
1843                         furthestRightAngle = this.getIndexAngle(furthestRightIndex);
1844
1845                         furthestLeftAngle = this.getIndexAngle(furthestLeftIndex);
1846
1847                         radiusReductionRight = xProtrusionRight / Math.sin(furthestRightAngle + Math.PI/2);
1848
1849                         radiusReductionLeft = xProtrusionLeft / Math.sin(furthestLeftAngle + Math.PI/2);
1850
1851                         // Ensure we actually need to reduce the size of the chart
1852                         radiusReductionRight = (isNumber(radiusReductionRight)) ? radiusReductionRight : 0;
1853                         radiusReductionLeft = (isNumber(radiusReductionLeft)) ? radiusReductionLeft : 0;
1854
1855                         this.drawingArea = largestPossibleRadius - (radiusReductionLeft + radiusReductionRight)/2;
1856
1857                         //this.drawingArea = min([maxWidthRadius, (this.height - (2 * (this.pointLabelFontSize + 5)))/2])
1858                         this.setCenterPoint(radiusReductionLeft, radiusReductionRight);
1859
1860                 },
1861                 setCenterPoint: function(leftMovement, rightMovement){
1862
1863                         var maxRight = this.width - rightMovement - this.drawingArea,
1864                                 maxLeft = leftMovement + this.drawingArea;
1865
1866                         this.xCenter = (maxLeft + maxRight)/2;
1867                         // Always vertically in the centre as the text height doesn't change
1868                         this.yCenter = (this.height/2);
1869                 },
1870
1871                 getIndexAngle : function(index){
1872                         var angleMultiplier = (Math.PI * 2) / this.valuesCount;
1873                         // Start from the top instead of right, so remove a quarter of the circle
1874
1875                         return index * angleMultiplier - (Math.PI/2);
1876                 },
1877                 getPointPosition : function(index, distanceFromCenter){
1878                         var thisAngle = this.getIndexAngle(index);
1879                         return {
1880                                 x : (Math.cos(thisAngle) * distanceFromCenter) + this.xCenter,
1881                                 y : (Math.sin(thisAngle) * distanceFromCenter) + this.yCenter
1882                         };
1883                 },
1884                 draw: function(){
1885                         if (this.display){
1886                                 var ctx = this.ctx;
1887                                 each(this.yLabels, function(label, index){
1888                                         // Don't draw a centre value
1889                                         if (index > 0){
1890                                                 var yCenterOffset = index * (this.drawingArea/this.steps),
1891                                                         yHeight = this.yCenter - yCenterOffset,
1892                                                         pointPosition;
1893
1894                                                 // Draw circular lines around the scale
1895                                                 if (this.lineWidth > 0){
1896                                                         ctx.strokeStyle = this.lineColor;
1897                                                         ctx.lineWidth = this.lineWidth;
1898
1899                                                         if(this.lineArc){
1900                                                                 ctx.beginPath();
1901                                                                 ctx.arc(this.xCenter, this.yCenter, yCenterOffset, 0, Math.PI*2);
1902                                                                 ctx.closePath();
1903                                                                 ctx.stroke();
1904                                                         } else{
1905                                                                 ctx.beginPath();
1906                                                                 for (var i=0;i<this.valuesCount;i++)
1907                                                                 {
1908                                                                         pointPosition = this.getPointPosition(i, this.calculateCenterOffset(this.min + (index * this.stepValue)));
1909                                                                         if (i === 0){
1910                                                                                 ctx.moveTo(pointPosition.x, pointPosition.y);
1911                                                                         } else {
1912                                                                                 ctx.lineTo(pointPosition.x, pointPosition.y);
1913                                                                         }
1914                                                                 }
1915                                                                 ctx.closePath();
1916                                                                 ctx.stroke();
1917                                                         }
1918                                                 }
1919                                                 if(this.showLabels){
1920                                                         ctx.font = fontString(this.fontSize,this.fontStyle,this.fontFamily);
1921                                                         if (this.showLabelBackdrop){
1922                                                                 var labelWidth = ctx.measureText(label).width;
1923                                                                 ctx.fillStyle = this.backdropColor;
1924                                                                 ctx.fillRect(
1925                                                                         this.xCenter - labelWidth/2 - this.backdropPaddingX,
1926                                                                         yHeight - this.fontSize/2 - this.backdropPaddingY,
1927                                                                         labelWidth + this.backdropPaddingX*2,
1928                                                                         this.fontSize + this.backdropPaddingY*2
1929                                                                 );
1930                                                         }
1931                                                         ctx.textAlign = 'center';
1932                                                         ctx.textBaseline = "middle";
1933                                                         ctx.fillStyle = this.fontColor;
1934                                                         ctx.fillText(label, this.xCenter, yHeight);
1935                                                 }
1936                                         }
1937                                 }, this);
1938
1939                                 if (!this.lineArc){
1940                                         ctx.lineWidth = this.angleLineWidth;
1941                                         ctx.strokeStyle = this.angleLineColor;
1942                                         for (var i = this.valuesCount - 1; i >= 0; i--) {
1943                                                 if (this.angleLineWidth > 0){
1944                                                         var outerPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max));
1945                                                         ctx.beginPath();
1946                                                         ctx.moveTo(this.xCenter, this.yCenter);
1947                                                         ctx.lineTo(outerPosition.x, outerPosition.y);
1948                                                         ctx.stroke();
1949                                                         ctx.closePath();
1950                                                 }
1951                                                 // Extra 3px out for some label spacing
1952                                                 var pointLabelPosition = this.getPointPosition(i, this.calculateCenterOffset(this.max) + 5);
1953                                                 ctx.font = fontString(this.pointLabelFontSize,this.pointLabelFontStyle,this.pointLabelFontFamily);
1954                                                 ctx.fillStyle = this.pointLabelFontColor;
1955
1956                                                 var labelsCount = this.labels.length,
1957                                                         halfLabelsCount = this.labels.length/2,
1958                                                         quarterLabelsCount = halfLabelsCount/2,
1959                                                         upperHalf = (i < quarterLabelsCount || i > labelsCount - quarterLabelsCount),
1960                                                         exactQuarter = (i === quarterLabelsCount || i === labelsCount - quarterLabelsCount);
1961                                                 if (i === 0){
1962                                                         ctx.textAlign = 'center';
1963                                                 } else if(i === halfLabelsCount){
1964                                                         ctx.textAlign = 'center';
1965                                                 } else if (i < halfLabelsCount){
1966                                                         ctx.textAlign = 'left';
1967                                                 } else {
1968                                                         ctx.textAlign = 'right';
1969                                                 }
1970
1971                                                 // Set the correct text baseline based on outer positioning
1972                                                 if (exactQuarter){
1973                                                         ctx.textBaseline = 'middle';
1974                                                 } else if (upperHalf){
1975                                                         ctx.textBaseline = 'bottom';
1976                                                 } else {
1977                                                         ctx.textBaseline = 'top';
1978                                                 }
1979
1980                                                 ctx.fillText(this.labels[i], pointLabelPosition.x, pointLabelPosition.y);
1981                                         }
1982                                 }
1983                         }
1984                 }
1985         });
1986
1987         // Attach global event to resize each chart instance when the browser resizes
1988         helpers.addEvent(window, "resize", (function(){
1989                 // Basic debounce of resize function so it doesn't hurt performance when resizing browser.
1990                 var timeout;
1991                 return function(){
1992                         clearTimeout(timeout);
1993                         timeout = setTimeout(function(){
1994                                 each(Chart.instances,function(instance){
1995                                         // If the responsive flag is set in the chart instance config
1996                                         // Cascade the resize event down to the chart.
1997                                         if (instance.options.responsive){
1998                                                 instance.resize(instance.render, true);
1999                                         }
2000                                 });
2001                         }, 50);
2002                 };
2003         })());
2004
2005
2006         if (amd) {
2007                 define(function(){
2008                         return Chart;
2009                 });
2010         } else if (typeof module === 'object' && module.exports) {
2011                 module.exports = Chart;
2012         }
2013
2014         root.Chart = Chart;
2015
2016         Chart.noConflict = function(){
2017                 root.Chart = previous;
2018                 return Chart;
2019         };
2020
2021 }).call(this);
2022
2023 (function(){
2024         "use strict";
2025
2026         var root = this,
2027                 Chart = root.Chart,
2028                 helpers = Chart.helpers;
2029
2030
2031         var defaultConfig = {
2032                 //Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
2033                 scaleBeginAtZero : true,
2034
2035                 //Boolean - Whether grid lines are shown across the chart
2036                 scaleShowGridLines : true,
2037
2038                 //String - Colour of the grid lines
2039                 scaleGridLineColor : "rgba(0,0,0,.05)",
2040
2041                 //Number - Width of the grid lines
2042                 scaleGridLineWidth : 1,
2043
2044                 //Boolean - Whether to show horizontal lines (except X axis)
2045                 scaleShowHorizontalLines: true,
2046
2047                 //Boolean - Whether to show vertical lines (except Y axis)
2048                 scaleShowVerticalLines: true,
2049
2050                 //Boolean - If there is a stroke on each bar
2051                 barShowStroke : true,
2052
2053                 //Number - Pixel width of the bar stroke
2054                 barStrokeWidth : 2,
2055
2056                 //Number - Spacing between each of the X value sets
2057                 barValueSpacing : 5,
2058
2059                 //Number - Spacing between data sets within X values
2060                 barDatasetSpacing : 1,
2061
2062                 //String - A legend template
2063                 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>"
2064
2065         };
2066
2067
2068         Chart.Type.extend({
2069                 name: "Bar",
2070                 defaults : defaultConfig,
2071                 initialize:  function(data){
2072
2073                         //Expose options as a scope variable here so we can access it in the ScaleClass
2074                         var options = this.options;
2075
2076                         this.ScaleClass = Chart.Scale.extend({
2077                                 offsetGridLines : true,
2078                                 calculateBarX : function(datasetCount, datasetIndex, barIndex){
2079                                         //Reusable method for calculating the xPosition of a given bar based on datasetIndex & width of the bar
2080                                         var xWidth = this.calculateBaseWidth(),
2081                                                 xAbsolute = this.calculateX(barIndex) - (xWidth/2),
2082                                                 barWidth = this.calculateBarWidth(datasetCount);
2083
2084                                         return xAbsolute + (barWidth * datasetIndex) + (datasetIndex * options.barDatasetSpacing) + barWidth/2;
2085                                 },
2086                                 calculateBaseWidth : function(){
2087                                         return (this.calculateX(1) - this.calculateX(0)) - (2*options.barValueSpacing);
2088                                 },
2089                                 calculateBarWidth : function(datasetCount){
2090                                         //The padding between datasets is to the right of each bar, providing that there are more than 1 dataset
2091                                         var baseWidth = this.calculateBaseWidth() - ((datasetCount - 1) * options.barDatasetSpacing);
2092
2093                                         return (baseWidth / datasetCount);
2094                                 }
2095                         });
2096
2097                         this.datasets = [];
2098
2099                         //Set up tooltip events on the chart
2100                         if (this.options.showTooltips){
2101                                 helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2102                                         var activeBars = (evt.type !== 'mouseout') ? this.getBarsAtEvent(evt) : [];
2103
2104                                         this.eachBars(function(bar){
2105                                                 bar.restore(['fillColor', 'strokeColor']);
2106                                         });
2107                                         helpers.each(activeBars, function(activeBar){
2108                                                 activeBar.fillColor = activeBar.highlightFill;
2109                                                 activeBar.strokeColor = activeBar.highlightStroke;
2110                                         });
2111                                         this.showTooltip(activeBars);
2112                                 });
2113                         }
2114
2115                         //Declare the extension of the default point, to cater for the options passed in to the constructor
2116                         this.BarClass = Chart.Rectangle.extend({
2117                                 strokeWidth : this.options.barStrokeWidth,
2118                                 showStroke : this.options.barShowStroke,
2119                                 ctx : this.chart.ctx
2120                         });
2121
2122                         //Iterate through each of the datasets, and build this into a property of the chart
2123                         helpers.each(data.datasets,function(dataset,datasetIndex){
2124
2125                                 var datasetObject = {
2126                                         label : dataset.label || null,
2127                                         fillColor : dataset.fillColor,
2128                                         strokeColor : dataset.strokeColor,
2129                                         bars : []
2130                                 };
2131
2132                                 this.datasets.push(datasetObject);
2133
2134                                 helpers.each(dataset.data,function(dataPoint,index){
2135                                         //Add a new point for each piece of data, passing any required data to draw.
2136                                         datasetObject.bars.push(new this.BarClass({
2137                                                 value : dataPoint,
2138                                                 label : data.labels[index],
2139                                                 datasetLabel: dataset.label,
2140                                                 strokeColor : dataset.strokeColor,
2141                                                 fillColor : dataset.fillColor,
2142                                                 highlightFill : dataset.highlightFill || dataset.fillColor,
2143                                                 highlightStroke : dataset.highlightStroke || dataset.strokeColor
2144                                         }));
2145                                 },this);
2146
2147                         },this);
2148
2149                         this.buildScale(data.labels);
2150
2151                         this.BarClass.prototype.base = this.scale.endPoint;
2152
2153                         this.eachBars(function(bar, index, datasetIndex){
2154                                 helpers.extend(bar, {
2155                                         width : this.scale.calculateBarWidth(this.datasets.length),
2156                                         x: this.scale.calculateBarX(this.datasets.length, datasetIndex, index),
2157                                         y: this.scale.endPoint
2158                                 });
2159                                 bar.save();
2160                         }, this);
2161
2162                         this.render();
2163                 },
2164                 update : function(){
2165                         this.scale.update();
2166                         // Reset any highlight colours before updating.
2167                         helpers.each(this.activeElements, function(activeElement){
2168                                 activeElement.restore(['fillColor', 'strokeColor']);
2169                         });
2170
2171                         this.eachBars(function(bar){
2172                                 bar.save();
2173                         });
2174                         this.render();
2175                 },
2176                 eachBars : function(callback){
2177                         helpers.each(this.datasets,function(dataset, datasetIndex){
2178                                 helpers.each(dataset.bars, callback, this, datasetIndex);
2179                         },this);
2180                 },
2181                 getBarsAtEvent : function(e){
2182                         var barsArray = [],
2183                                 eventPosition = helpers.getRelativePosition(e),
2184                                 datasetIterator = function(dataset){
2185                                         barsArray.push(dataset.bars[barIndex]);
2186                                 },
2187                                 barIndex;
2188
2189                         for (var datasetIndex = 0; datasetIndex < this.datasets.length; datasetIndex++) {
2190                                 for (barIndex = 0; barIndex < this.datasets[datasetIndex].bars.length; barIndex++) {
2191                                         if (this.datasets[datasetIndex].bars[barIndex].inRange(eventPosition.x,eventPosition.y)){
2192                                                 helpers.each(this.datasets, datasetIterator);
2193                                                 return barsArray;
2194                                         }
2195                                 }
2196                         }
2197
2198                         return barsArray;
2199                 },
2200                 buildScale : function(labels){
2201                         var self = this;
2202
2203                         var dataTotal = function(){
2204                                 var values = [];
2205                                 self.eachBars(function(bar){
2206                                         values.push(bar.value);
2207                                 });
2208                                 return values;
2209                         };
2210
2211                         var scaleOptions = {
2212                                 templateString : this.options.scaleLabel,
2213                                 height : this.chart.height,
2214                                 width : this.chart.width,
2215                                 ctx : this.chart.ctx,
2216                                 textColor : this.options.scaleFontColor,
2217                                 fontSize : this.options.scaleFontSize,
2218                                 fontStyle : this.options.scaleFontStyle,
2219                                 fontFamily : this.options.scaleFontFamily,
2220                                 valuesCount : labels.length,
2221                                 beginAtZero : this.options.scaleBeginAtZero,
2222                                 integersOnly : this.options.scaleIntegersOnly,
2223                                 calculateYRange: function(currentHeight){
2224                                         var updatedRanges = helpers.calculateScaleRange(
2225                                                 dataTotal(),
2226                                                 currentHeight,
2227                                                 this.fontSize,
2228                                                 this.beginAtZero,
2229                                                 this.integersOnly
2230                                         );
2231                                         helpers.extend(this, updatedRanges);
2232                                 },
2233                                 xLabels : labels,
2234                                 font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
2235                                 lineWidth : this.options.scaleLineWidth,
2236                                 lineColor : this.options.scaleLineColor,
2237                                 showHorizontalLines : this.options.scaleShowHorizontalLines,
2238                                 showVerticalLines : this.options.scaleShowVerticalLines,
2239                                 gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
2240                                 gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
2241                                 padding : (this.options.showScale) ? 0 : (this.options.barShowStroke) ? this.options.barStrokeWidth : 0,
2242                                 showLabels : this.options.scaleShowLabels,
2243                                 display : this.options.showScale
2244                         };
2245
2246                         if (this.options.scaleOverride){
2247                                 helpers.extend(scaleOptions, {
2248                                         calculateYRange: helpers.noop,
2249                                         steps: this.options.scaleSteps,
2250                                         stepValue: this.options.scaleStepWidth,
2251                                         min: this.options.scaleStartValue,
2252                                         max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
2253                                 });
2254                         }
2255
2256                         this.scale = new this.ScaleClass(scaleOptions);
2257                 },
2258                 addData : function(valuesArray,label){
2259                         //Map the values array for each of the datasets
2260                         helpers.each(valuesArray,function(value,datasetIndex){
2261                                 //Add a new point for each piece of data, passing any required data to draw.
2262                                 this.datasets[datasetIndex].bars.push(new this.BarClass({
2263                                         value : value,
2264                                         label : label,
2265                                         x: this.scale.calculateBarX(this.datasets.length, datasetIndex, this.scale.valuesCount+1),
2266                                         y: this.scale.endPoint,
2267                                         width : this.scale.calculateBarWidth(this.datasets.length),
2268                                         base : this.scale.endPoint,
2269                                         strokeColor : this.datasets[datasetIndex].strokeColor,
2270                                         fillColor : this.datasets[datasetIndex].fillColor
2271                                 }));
2272                         },this);
2273
2274                         this.scale.addXLabel(label);
2275                         //Then re-render the chart.
2276                         this.update();
2277                 },
2278                 removeData : function(){
2279                         this.scale.removeXLabel();
2280                         //Then re-render the chart.
2281                         helpers.each(this.datasets,function(dataset){
2282                                 dataset.bars.shift();
2283                         },this);
2284                         this.update();
2285                 },
2286                 reflow : function(){
2287                         helpers.extend(this.BarClass.prototype,{
2288                                 y: this.scale.endPoint,
2289                                 base : this.scale.endPoint
2290                         });
2291                         var newScaleProps = helpers.extend({
2292                                 height : this.chart.height,
2293                                 width : this.chart.width
2294                         });
2295                         this.scale.update(newScaleProps);
2296                 },
2297                 draw : function(ease){
2298                         var easingDecimal = ease || 1;
2299                         this.clear();
2300
2301                         var ctx = this.chart.ctx;
2302
2303                         this.scale.draw(easingDecimal);
2304
2305                         //Draw all the bars for each dataset
2306                         helpers.each(this.datasets,function(dataset,datasetIndex){
2307                                 helpers.each(dataset.bars,function(bar,index){
2308                                         if (bar.hasValue()){
2309                                                 bar.base = this.scale.endPoint;
2310                                                 //Transition then draw
2311                                                 bar.transition({
2312                                                         x : this.scale.calculateBarX(this.datasets.length, datasetIndex, index),
2313                                                         y : this.scale.calculateY(bar.value),
2314                                                         width : this.scale.calculateBarWidth(this.datasets.length)
2315                                                 }, easingDecimal).draw();
2316                                         }
2317                                 },this);
2318
2319                         },this);
2320                 }
2321         });
2322
2323
2324 }).call(this);
2325
2326 (function(){
2327         "use strict";
2328
2329         var root = this,
2330                 Chart = root.Chart,
2331                 //Cache a local reference to Chart.helpers
2332                 helpers = Chart.helpers;
2333
2334         var defaultConfig = {
2335                 //Boolean - Whether we should show a stroke on each segment
2336                 segmentShowStroke : true,
2337
2338                 //String - The colour of each segment stroke
2339                 segmentStrokeColor : "#fff",
2340
2341                 //Number - The width of each segment stroke
2342                 segmentStrokeWidth : 2,
2343
2344                 //The percentage of the chart that we cut out of the middle.
2345                 percentageInnerCutout : 50,
2346
2347                 //Number - Amount of animation steps
2348                 animationSteps : 100,
2349
2350                 //String - Animation easing effect
2351                 animationEasing : "easeOutBounce",
2352
2353                 //Boolean - Whether we animate the rotation of the Doughnut
2354                 animateRotate : true,
2355
2356                 //Boolean - Whether we animate scaling the Doughnut from the centre
2357                 animateScale : false,
2358
2359                 //String - A legend template
2360                 legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"
2361
2362         };
2363
2364
2365         Chart.Type.extend({
2366                 //Passing in a name registers this chart in the Chart namespace
2367                 name: "Doughnut",
2368                 //Providing a defaults will also register the deafults in the chart namespace
2369                 defaults : defaultConfig,
2370                 //Initialize is fired when the chart is initialized - Data is passed in as a parameter
2371                 //Config is automatically merged by the core of Chart.js, and is available at this.options
2372                 initialize:  function(data){
2373
2374                         //Declare segments as a static property to prevent inheriting across the Chart type prototype
2375                         this.segments = [];
2376                         this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) - this.options.segmentStrokeWidth/2)/2;
2377
2378                         this.SegmentArc = Chart.Arc.extend({
2379                                 ctx : this.chart.ctx,
2380                                 x : this.chart.width/2,
2381                                 y : this.chart.height/2
2382                         });
2383
2384                         //Set up tooltip events on the chart
2385                         if (this.options.showTooltips){
2386                                 helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2387                                         var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
2388
2389                                         helpers.each(this.segments,function(segment){
2390                                                 segment.restore(["fillColor"]);
2391                                         });
2392                                         helpers.each(activeSegments,function(activeSegment){
2393                                                 activeSegment.fillColor = activeSegment.highlightColor;
2394                                         });
2395                                         this.showTooltip(activeSegments);
2396                                 });
2397                         }
2398                         this.calculateTotal(data);
2399
2400                         helpers.each(data,function(datapoint, index){
2401                                 this.addData(datapoint, index, true);
2402                         },this);
2403
2404                         this.render();
2405                 },
2406                 getSegmentsAtEvent : function(e){
2407                         var segmentsArray = [];
2408
2409                         var location = helpers.getRelativePosition(e);
2410
2411                         helpers.each(this.segments,function(segment){
2412                                 if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
2413                         },this);
2414                         return segmentsArray;
2415                 },
2416                 addData : function(segment, atIndex, silent){
2417                         var index = atIndex || this.segments.length;
2418                         this.segments.splice(index, 0, new this.SegmentArc({
2419                                 value : segment.value,
2420                                 outerRadius : (this.options.animateScale) ? 0 : this.outerRadius,
2421                                 innerRadius : (this.options.animateScale) ? 0 : (this.outerRadius/100) * this.options.percentageInnerCutout,
2422                                 fillColor : segment.color,
2423                                 highlightColor : segment.highlight || segment.color,
2424                                 showStroke : this.options.segmentShowStroke,
2425                                 strokeWidth : this.options.segmentStrokeWidth,
2426                                 strokeColor : this.options.segmentStrokeColor,
2427                                 startAngle : Math.PI * 1.5,
2428                                 circumference : (this.options.animateRotate) ? 0 : this.calculateCircumference(segment.value),
2429                                 label : segment.label
2430                         }));
2431                         if (!silent){
2432                                 this.reflow();
2433                                 this.update();
2434                         }
2435                 },
2436                 calculateCircumference : function(value){
2437                         return (Math.PI*2)*(Math.abs(value) / this.total);
2438                 },
2439                 calculateTotal : function(data){
2440                         this.total = 0;
2441                         helpers.each(data,function(segment){
2442                                 this.total += Math.abs(segment.value);
2443                         },this);
2444                 },
2445                 update : function(){
2446                         this.calculateTotal(this.segments);
2447
2448                         // Reset any highlight colours before updating.
2449                         helpers.each(this.activeElements, function(activeElement){
2450                                 activeElement.restore(['fillColor']);
2451                         });
2452
2453                         helpers.each(this.segments,function(segment){
2454                                 segment.save();
2455                         });
2456                         this.render();
2457                 },
2458
2459                 removeData: function(atIndex){
2460                         var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
2461                         this.segments.splice(indexToDelete, 1);
2462                         this.reflow();
2463                         this.update();
2464                 },
2465
2466                 reflow : function(){
2467                         helpers.extend(this.SegmentArc.prototype,{
2468                                 x : this.chart.width/2,
2469                                 y : this.chart.height/2
2470                         });
2471                         this.outerRadius = (helpers.min([this.chart.width,this.chart.height]) - this.options.segmentStrokeWidth/2)/2;
2472                         helpers.each(this.segments, function(segment){
2473                                 segment.update({
2474                                         outerRadius : this.outerRadius,
2475                                         innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
2476                                 });
2477                         }, this);
2478                 },
2479                 draw : function(easeDecimal){
2480                         var animDecimal = (easeDecimal) ? easeDecimal : 1;
2481                         this.clear();
2482                         helpers.each(this.segments,function(segment,index){
2483                                 segment.transition({
2484                                         circumference : this.calculateCircumference(segment.value),
2485                                         outerRadius : this.outerRadius,
2486                                         innerRadius : (this.outerRadius/100) * this.options.percentageInnerCutout
2487                                 },animDecimal);
2488
2489                                 segment.endAngle = segment.startAngle + segment.circumference;
2490
2491                                 segment.draw();
2492                                 if (index === 0){
2493                                         segment.startAngle = Math.PI * 1.5;
2494                                 }
2495                                 //Check to see if it's the last segment, if not get the next and update the start angle
2496                                 if (index < this.segments.length-1){
2497                                         this.segments[index+1].startAngle = segment.endAngle;
2498                                 }
2499                         },this);
2500
2501                 }
2502         });
2503
2504         Chart.types.Doughnut.extend({
2505                 name : "Pie",
2506                 defaults : helpers.merge(defaultConfig,{percentageInnerCutout : 0})
2507         });
2508
2509 }).call(this);
2510 (function(){
2511         "use strict";
2512
2513         var root = this,
2514                 Chart = root.Chart,
2515                 helpers = Chart.helpers;
2516
2517         var defaultConfig = {
2518
2519                 ///Boolean - Whether grid lines are shown across the chart
2520                 scaleShowGridLines : true,
2521
2522                 //String - Colour of the grid lines
2523                 scaleGridLineColor : "rgba(0,0,0,.05)",
2524
2525                 //Number - Width of the grid lines
2526                 scaleGridLineWidth : 1,
2527
2528                 //Boolean - Whether to show horizontal lines (except X axis)
2529                 scaleShowHorizontalLines: true,
2530
2531                 //Boolean - Whether to show vertical lines (except Y axis)
2532                 scaleShowVerticalLines: true,
2533
2534                 //Boolean - Whether the line is curved between points
2535                 bezierCurve : true,
2536
2537                 //Number - Tension of the bezier curve between points
2538                 bezierCurveTension : 0.4,
2539
2540                 //Boolean - Whether to show a dot for each point
2541                 pointDot : true,
2542
2543                 //Number - Radius of each point dot in pixels
2544                 pointDotRadius : 4,
2545
2546                 //Number - Pixel width of point dot stroke
2547                 pointDotStrokeWidth : 1,
2548
2549                 //Number - amount extra to add to the radius to cater for hit detection outside the drawn point
2550                 pointHitDetectionRadius : 20,
2551
2552                 //Boolean - Whether to show a stroke for datasets
2553                 datasetStroke : true,
2554
2555                 //Number - Pixel width of dataset stroke
2556                 datasetStrokeWidth : 2,
2557
2558                 //Boolean - Whether to fill the dataset with a colour
2559                 datasetFill : true,
2560
2561                 //String - A legend template
2562                 legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"
2563
2564         };
2565
2566
2567         Chart.Type.extend({
2568                 name: "Line",
2569                 defaults : defaultConfig,
2570                 initialize:  function(data){
2571                         //Declare the extension of the default point, to cater for the options passed in to the constructor
2572                         this.PointClass = Chart.Point.extend({
2573                                 strokeWidth : this.options.pointDotStrokeWidth,
2574                                 radius : this.options.pointDotRadius,
2575                                 display: this.options.pointDot,
2576                                 hitDetectionRadius : this.options.pointHitDetectionRadius,
2577                                 ctx : this.chart.ctx,
2578                                 inRange : function(mouseX){
2579                                         return (Math.pow(mouseX-this.x, 2) < Math.pow(this.radius + this.hitDetectionRadius,2));
2580                                 }
2581                         });
2582
2583                         this.datasets = [];
2584
2585                         //Set up tooltip events on the chart
2586                         if (this.options.showTooltips){
2587                                 helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2588                                         var activePoints = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];
2589                                         this.eachPoints(function(point){
2590                                                 point.restore(['fillColor', 'strokeColor']);
2591                                         });
2592                                         helpers.each(activePoints, function(activePoint){
2593                                                 activePoint.fillColor = activePoint.highlightFill;
2594                                                 activePoint.strokeColor = activePoint.highlightStroke;
2595                                         });
2596                                         this.showTooltip(activePoints);
2597                                 });
2598                         }
2599
2600                         //Iterate through each of the datasets, and build this into a property of the chart
2601                         helpers.each(data.datasets,function(dataset){
2602
2603                                 var datasetObject = {
2604                                         label : dataset.label || null,
2605                                         fillColor : dataset.fillColor,
2606                                         strokeColor : dataset.strokeColor,
2607                                         pointColor : dataset.pointColor,
2608                                         pointStrokeColor : dataset.pointStrokeColor,
2609                                         points : []
2610                                 };
2611
2612                                 this.datasets.push(datasetObject);
2613
2614
2615                                 helpers.each(dataset.data,function(dataPoint,index){
2616                                         //Add a new point for each piece of data, passing any required data to draw.
2617                                         datasetObject.points.push(new this.PointClass({
2618                                                 value : dataPoint,
2619                                                 label : data.labels[index],
2620                                                 datasetLabel: dataset.label,
2621                                                 strokeColor : dataset.pointStrokeColor,
2622                                                 fillColor : dataset.pointColor,
2623                                                 highlightFill : dataset.pointHighlightFill || dataset.pointColor,
2624                                                 highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
2625                                         }));
2626                                 },this);
2627
2628                                 this.buildScale(data.labels);
2629
2630
2631                                 this.eachPoints(function(point, index){
2632                                         helpers.extend(point, {
2633                                                 x: this.scale.calculateX(index),
2634                                                 y: this.scale.endPoint
2635                                         });
2636                                         point.save();
2637                                 }, this);
2638
2639                         },this);
2640
2641
2642                         this.render();
2643                 },
2644                 update : function(){
2645                         this.scale.update();
2646                         // Reset any highlight colours before updating.
2647                         helpers.each(this.activeElements, function(activeElement){
2648                                 activeElement.restore(['fillColor', 'strokeColor']);
2649                         });
2650                         this.eachPoints(function(point){
2651                                 point.save();
2652                         });
2653                         this.render();
2654                 },
2655                 eachPoints : function(callback){
2656                         helpers.each(this.datasets,function(dataset){
2657                                 helpers.each(dataset.points,callback,this);
2658                         },this);
2659                 },
2660                 getPointsAtEvent : function(e){
2661                         var pointsArray = [],
2662                                 eventPosition = helpers.getRelativePosition(e);
2663                         helpers.each(this.datasets,function(dataset){
2664                                 helpers.each(dataset.points,function(point){
2665                                         if (point.inRange(eventPosition.x,eventPosition.y)) pointsArray.push(point);
2666                                 });
2667                         },this);
2668                         return pointsArray;
2669                 },
2670                 buildScale : function(labels){
2671                         var self = this;
2672
2673                         var dataTotal = function(){
2674                                 var values = [];
2675                                 self.eachPoints(function(point){
2676                                         values.push(point.value);
2677                                 });
2678
2679                                 return values;
2680                         };
2681
2682                         var scaleOptions = {
2683                                 templateString : this.options.scaleLabel,
2684                                 height : this.chart.height,
2685                                 width : this.chart.width,
2686                                 ctx : this.chart.ctx,
2687                                 textColor : this.options.scaleFontColor,
2688                                 fontSize : this.options.scaleFontSize,
2689                                 fontStyle : this.options.scaleFontStyle,
2690                                 fontFamily : this.options.scaleFontFamily,
2691                                 valuesCount : labels.length,
2692                                 beginAtZero : this.options.scaleBeginAtZero,
2693                                 integersOnly : this.options.scaleIntegersOnly,
2694                                 calculateYRange : function(currentHeight){
2695                                         var updatedRanges = helpers.calculateScaleRange(
2696                                                 dataTotal(),
2697                                                 currentHeight,
2698                                                 this.fontSize,
2699                                                 this.beginAtZero,
2700                                                 this.integersOnly
2701                                         );
2702                                         helpers.extend(this, updatedRanges);
2703                                 },
2704                                 xLabels : labels,
2705                                 font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
2706                                 lineWidth : this.options.scaleLineWidth,
2707                                 lineColor : this.options.scaleLineColor,
2708                                 showHorizontalLines : this.options.scaleShowHorizontalLines,
2709                                 showVerticalLines : this.options.scaleShowVerticalLines,
2710                                 gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
2711                                 gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
2712                                 padding: (this.options.showScale) ? 0 : this.options.pointDotRadius + this.options.pointDotStrokeWidth,
2713                                 showLabels : this.options.scaleShowLabels,
2714                                 display : this.options.showScale
2715                         };
2716
2717                         if (this.options.scaleOverride){
2718                                 helpers.extend(scaleOptions, {
2719                                         calculateYRange: helpers.noop,
2720                                         steps: this.options.scaleSteps,
2721                                         stepValue: this.options.scaleStepWidth,
2722                                         min: this.options.scaleStartValue,
2723                                         max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
2724                                 });
2725                         }
2726
2727
2728                         this.scale = new Chart.Scale(scaleOptions);
2729                 },
2730                 addData : function(valuesArray,label){
2731                         //Map the values array for each of the datasets
2732
2733                         helpers.each(valuesArray,function(value,datasetIndex){
2734                                 //Add a new point for each piece of data, passing any required data to draw.
2735                                 this.datasets[datasetIndex].points.push(new this.PointClass({
2736                                         value : value,
2737                                         label : label,
2738                                         x: this.scale.calculateX(this.scale.valuesCount+1),
2739                                         y: this.scale.endPoint,
2740                                         strokeColor : this.datasets[datasetIndex].pointStrokeColor,
2741                                         fillColor : this.datasets[datasetIndex].pointColor
2742                                 }));
2743                         },this);
2744
2745                         this.scale.addXLabel(label);
2746                         //Then re-render the chart.
2747                         this.update();
2748                 },
2749                 removeData : function(){
2750                         this.scale.removeXLabel();
2751                         //Then re-render the chart.
2752                         helpers.each(this.datasets,function(dataset){
2753                                 dataset.points.shift();
2754                         },this);
2755                         this.update();
2756                 },
2757                 reflow : function(){
2758                         var newScaleProps = helpers.extend({
2759                                 height : this.chart.height,
2760                                 width : this.chart.width
2761                         });
2762                         this.scale.update(newScaleProps);
2763                 },
2764                 draw : function(ease){
2765                         var easingDecimal = ease || 1;
2766                         this.clear();
2767
2768                         var ctx = this.chart.ctx;
2769
2770                         // Some helper methods for getting the next/prev points
2771                         var hasValue = function(item){
2772                                 return item.value !== null;
2773                         },
2774                         nextPoint = function(point, collection, index){
2775                                 return helpers.findNextWhere(collection, hasValue, index) || point;
2776                         },
2777                         previousPoint = function(point, collection, index){
2778                                 return helpers.findPreviousWhere(collection, hasValue, index) || point;
2779                         };
2780
2781                         this.scale.draw(easingDecimal);
2782
2783
2784                         helpers.each(this.datasets,function(dataset){
2785                                 var pointsWithValues = helpers.where(dataset.points, hasValue);
2786
2787                                 //Transition each point first so that the line and point drawing isn't out of sync
2788                                 //We can use this extra loop to calculate the control points of this dataset also in this loop
2789
2790                                 helpers.each(dataset.points, function(point, index){
2791                                         if (point.hasValue()){
2792                                                 point.transition({
2793                                                         y : this.scale.calculateY(point.value),
2794                                                         x : this.scale.calculateX(index)
2795                                                 }, easingDecimal);
2796                                         }
2797                                 },this);
2798
2799
2800                                 // Control points need to be calculated in a seperate loop, because we need to know the current x/y of the point
2801                                 // This would cause issues when there is no animation, because the y of the next point would be 0, so beziers would be skewed
2802                                 if (this.options.bezierCurve){
2803                                         helpers.each(pointsWithValues, function(point, index){
2804                                                 var tension = (index > 0 && index < pointsWithValues.length - 1) ? this.options.bezierCurveTension : 0;
2805                                                 point.controlPoints = helpers.splineCurve(
2806                                                         previousPoint(point, pointsWithValues, index),
2807                                                         point,
2808                                                         nextPoint(point, pointsWithValues, index),
2809                                                         tension
2810                                                 );
2811
2812                                                 // Prevent the bezier going outside of the bounds of the graph
2813
2814                                                 // Cap puter bezier handles to the upper/lower scale bounds
2815                                                 if (point.controlPoints.outer.y > this.scale.endPoint){
2816                                                         point.controlPoints.outer.y = this.scale.endPoint;
2817                                                 }
2818                                                 else if (point.controlPoints.outer.y < this.scale.startPoint){
2819                                                         point.controlPoints.outer.y = this.scale.startPoint;
2820                                                 }
2821
2822                                                 // Cap inner bezier handles to the upper/lower scale bounds
2823                                                 if (point.controlPoints.inner.y > this.scale.endPoint){
2824                                                         point.controlPoints.inner.y = this.scale.endPoint;
2825                                                 }
2826                                                 else if (point.controlPoints.inner.y < this.scale.startPoint){
2827                                                         point.controlPoints.inner.y = this.scale.startPoint;
2828                                                 }
2829                                         },this);
2830                                 }
2831
2832
2833                                 //Draw the line between all the points
2834                                 ctx.lineWidth = this.options.datasetStrokeWidth;
2835                                 ctx.strokeStyle = dataset.strokeColor;
2836                                 ctx.beginPath();
2837
2838                                 helpers.each(pointsWithValues, function(point, index){
2839                                         if (index === 0){
2840                                                 ctx.moveTo(point.x, point.y);
2841                                         }
2842                                         else{
2843                                                 if(this.options.bezierCurve){
2844                                                         var previous = previousPoint(point, pointsWithValues, index);
2845
2846                                                         ctx.bezierCurveTo(
2847                                                                 previous.controlPoints.outer.x,
2848                                                                 previous.controlPoints.outer.y,
2849                                                                 point.controlPoints.inner.x,
2850                                                                 point.controlPoints.inner.y,
2851                                                                 point.x,
2852                                                                 point.y
2853                                                         );
2854                                                 }
2855                                                 else{
2856                                                         ctx.lineTo(point.x,point.y);
2857                                                 }
2858                                         }
2859                                 }, this);
2860
2861                                 ctx.stroke();
2862
2863                                 if (this.options.datasetFill && pointsWithValues.length > 0){
2864                                         //Round off the line by going to the base of the chart, back to the start, then fill.
2865                                         ctx.lineTo(pointsWithValues[pointsWithValues.length - 1].x, this.scale.endPoint);
2866                                         ctx.lineTo(pointsWithValues[0].x, this.scale.endPoint);
2867                                         ctx.fillStyle = dataset.fillColor;
2868                                         ctx.closePath();
2869                                         ctx.fill();
2870                                 }
2871
2872                                 //Now draw the points over the line
2873                                 //A little inefficient double looping, but better than the line
2874                                 //lagging behind the point positions
2875                                 helpers.each(pointsWithValues,function(point){
2876                                         point.draw();
2877                                 });
2878                         },this);
2879                 }
2880         });
2881
2882
2883 }).call(this);
2884
2885 (function(){
2886         "use strict";
2887
2888         var root = this,
2889                 Chart = root.Chart,
2890                 //Cache a local reference to Chart.helpers
2891                 helpers = Chart.helpers;
2892
2893         var defaultConfig = {
2894                 //Boolean - Show a backdrop to the scale label
2895                 scaleShowLabelBackdrop : true,
2896
2897                 //String - The colour of the label backdrop
2898                 scaleBackdropColor : "rgba(255,255,255,0.75)",
2899
2900                 // Boolean - Whether the scale should begin at zero
2901                 scaleBeginAtZero : true,
2902
2903                 //Number - The backdrop padding above & below the label in pixels
2904                 scaleBackdropPaddingY : 2,
2905
2906                 //Number - The backdrop padding to the side of the label in pixels
2907                 scaleBackdropPaddingX : 2,
2908
2909                 //Boolean - Show line for each value in the scale
2910                 scaleShowLine : true,
2911
2912                 //Boolean - Stroke a line around each segment in the chart
2913                 segmentShowStroke : true,
2914
2915                 //String - The colour of the stroke on each segement.
2916                 segmentStrokeColor : "#fff",
2917
2918                 //Number - The width of the stroke value in pixels
2919                 segmentStrokeWidth : 2,
2920
2921                 //Number - Amount of animation steps
2922                 animationSteps : 100,
2923
2924                 //String - Animation easing effect.
2925                 animationEasing : "easeOutBounce",
2926
2927                 //Boolean - Whether to animate the rotation of the chart
2928                 animateRotate : true,
2929
2930                 //Boolean - Whether to animate scaling the chart from the centre
2931                 animateScale : false,
2932
2933                 //String - A legend template
2934                 legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"
2935         };
2936
2937
2938         Chart.Type.extend({
2939                 //Passing in a name registers this chart in the Chart namespace
2940                 name: "PolarArea",
2941                 //Providing a defaults will also register the deafults in the chart namespace
2942                 defaults : defaultConfig,
2943                 //Initialize is fired when the chart is initialized - Data is passed in as a parameter
2944                 //Config is automatically merged by the core of Chart.js, and is available at this.options
2945                 initialize:  function(data){
2946                         this.segments = [];
2947                         //Declare segment class as a chart instance specific class, so it can share props for this instance
2948                         this.SegmentArc = Chart.Arc.extend({
2949                                 showStroke : this.options.segmentShowStroke,
2950                                 strokeWidth : this.options.segmentStrokeWidth,
2951                                 strokeColor : this.options.segmentStrokeColor,
2952                                 ctx : this.chart.ctx,
2953                                 innerRadius : 0,
2954                                 x : this.chart.width/2,
2955                                 y : this.chart.height/2
2956                         });
2957                         this.scale = new Chart.RadialScale({
2958                                 display: this.options.showScale,
2959                                 fontStyle: this.options.scaleFontStyle,
2960                                 fontSize: this.options.scaleFontSize,
2961                                 fontFamily: this.options.scaleFontFamily,
2962                                 fontColor: this.options.scaleFontColor,
2963                                 showLabels: this.options.scaleShowLabels,
2964                                 showLabelBackdrop: this.options.scaleShowLabelBackdrop,
2965                                 backdropColor: this.options.scaleBackdropColor,
2966                                 backdropPaddingY : this.options.scaleBackdropPaddingY,
2967                                 backdropPaddingX: this.options.scaleBackdropPaddingX,
2968                                 lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0,
2969                                 lineColor: this.options.scaleLineColor,
2970                                 lineArc: true,
2971                                 width: this.chart.width,
2972                                 height: this.chart.height,
2973                                 xCenter: this.chart.width/2,
2974                                 yCenter: this.chart.height/2,
2975                                 ctx : this.chart.ctx,
2976                                 templateString: this.options.scaleLabel,
2977                                 valuesCount: data.length
2978                         });
2979
2980                         this.updateScaleRange(data);
2981
2982                         this.scale.update();
2983
2984                         helpers.each(data,function(segment,index){
2985                                 this.addData(segment,index,true);
2986                         },this);
2987
2988                         //Set up tooltip events on the chart
2989                         if (this.options.showTooltips){
2990                                 helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
2991                                         var activeSegments = (evt.type !== 'mouseout') ? this.getSegmentsAtEvent(evt) : [];
2992                                         helpers.each(this.segments,function(segment){
2993                                                 segment.restore(["fillColor"]);
2994                                         });
2995                                         helpers.each(activeSegments,function(activeSegment){
2996                                                 activeSegment.fillColor = activeSegment.highlightColor;
2997                                         });
2998                                         this.showTooltip(activeSegments);
2999                                 });
3000                         }
3001
3002                         this.render();
3003                 },
3004                 getSegmentsAtEvent : function(e){
3005                         var segmentsArray = [];
3006
3007                         var location = helpers.getRelativePosition(e);
3008
3009                         helpers.each(this.segments,function(segment){
3010                                 if (segment.inRange(location.x,location.y)) segmentsArray.push(segment);
3011                         },this);
3012                         return segmentsArray;
3013                 },
3014                 addData : function(segment, atIndex, silent){
3015                         var index = atIndex || this.segments.length;
3016
3017                         this.segments.splice(index, 0, new this.SegmentArc({
3018                                 fillColor: segment.color,
3019                                 highlightColor: segment.highlight || segment.color,
3020                                 label: segment.label,
3021                                 value: segment.value,
3022                                 outerRadius: (this.options.animateScale) ? 0 : this.scale.calculateCenterOffset(segment.value),
3023                                 circumference: (this.options.animateRotate) ? 0 : this.scale.getCircumference(),
3024                                 startAngle: Math.PI * 1.5
3025                         }));
3026                         if (!silent){
3027                                 this.reflow();
3028                                 this.update();
3029                         }
3030                 },
3031                 removeData: function(atIndex){
3032                         var indexToDelete = (helpers.isNumber(atIndex)) ? atIndex : this.segments.length-1;
3033                         this.segments.splice(indexToDelete, 1);
3034                         this.reflow();
3035                         this.update();
3036                 },
3037                 calculateTotal: function(data){
3038                         this.total = 0;
3039                         helpers.each(data,function(segment){
3040                                 this.total += segment.value;
3041                         },this);
3042                         this.scale.valuesCount = this.segments.length;
3043                 },
3044                 updateScaleRange: function(datapoints){
3045                         var valuesArray = [];
3046                         helpers.each(datapoints,function(segment){
3047                                 valuesArray.push(segment.value);
3048                         });
3049
3050                         var scaleSizes = (this.options.scaleOverride) ?
3051                                 {
3052                                         steps: this.options.scaleSteps,
3053                                         stepValue: this.options.scaleStepWidth,
3054                                         min: this.options.scaleStartValue,
3055                                         max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
3056                                 } :
3057                                 helpers.calculateScaleRange(
3058                                         valuesArray,
3059                                         helpers.min([this.chart.width, this.chart.height])/2,
3060                                         this.options.scaleFontSize,
3061                                         this.options.scaleBeginAtZero,
3062                                         this.options.scaleIntegersOnly
3063                                 );
3064
3065                         helpers.extend(
3066                                 this.scale,
3067                                 scaleSizes,
3068                                 {
3069                                         size: helpers.min([this.chart.width, this.chart.height]),
3070                                         xCenter: this.chart.width/2,
3071                                         yCenter: this.chart.height/2
3072                                 }
3073                         );
3074
3075                 },
3076                 update : function(){
3077                         this.calculateTotal(this.segments);
3078
3079                         helpers.each(this.segments,function(segment){
3080                                 segment.save();
3081                         });
3082
3083                         this.reflow();
3084                         this.render();
3085                 },
3086                 reflow : function(){
3087                         helpers.extend(this.SegmentArc.prototype,{
3088                                 x : this.chart.width/2,
3089                                 y : this.chart.height/2
3090                         });
3091                         this.updateScaleRange(this.segments);
3092                         this.scale.update();
3093
3094                         helpers.extend(this.scale,{
3095                                 xCenter: this.chart.width/2,
3096                                 yCenter: this.chart.height/2
3097                         });
3098
3099                         helpers.each(this.segments, function(segment){
3100                                 segment.update({
3101                                         outerRadius : this.scale.calculateCenterOffset(segment.value)
3102                                 });
3103                         }, this);
3104
3105                 },
3106                 draw : function(ease){
3107                         var easingDecimal = ease || 1;
3108                         //Clear & draw the canvas
3109                         this.clear();
3110                         helpers.each(this.segments,function(segment, index){
3111                                 segment.transition({
3112                                         circumference : this.scale.getCircumference(),
3113                                         outerRadius : this.scale.calculateCenterOffset(segment.value)
3114                                 },easingDecimal);
3115
3116                                 segment.endAngle = segment.startAngle + segment.circumference;
3117
3118                                 // If we've removed the first segment we need to set the first one to
3119                                 // start at the top.
3120                                 if (index === 0){
3121                                         segment.startAngle = Math.PI * 1.5;
3122                                 }
3123
3124                                 //Check to see if it's the last segment, if not get the next and update the start angle
3125                                 if (index < this.segments.length - 1){
3126                                         this.segments[index+1].startAngle = segment.endAngle;
3127                                 }
3128                                 segment.draw();
3129                         }, this);
3130                         this.scale.draw();
3131                 }
3132         });
3133
3134 }).call(this);
3135 (function(){
3136         "use strict";
3137
3138         var root = this,
3139                 Chart = root.Chart,
3140                 helpers = Chart.helpers;
3141
3142
3143
3144         Chart.Type.extend({
3145                 name: "Radar",
3146                 defaults:{
3147                         //Boolean - Whether to show lines for each scale point
3148                         scaleShowLine : true,
3149
3150                         //Boolean - Whether we show the angle lines out of the radar
3151                         angleShowLineOut : true,
3152
3153                         //Boolean - Whether to show labels on the scale
3154                         scaleShowLabels : false,
3155
3156                         // Boolean - Whether the scale should begin at zero
3157                         scaleBeginAtZero : true,
3158
3159                         //String - Colour of the angle line
3160                         angleLineColor : "rgba(0,0,0,.1)",
3161
3162                         //Number - Pixel width of the angle line
3163                         angleLineWidth : 1,
3164
3165                         //String - Point label font declaration
3166                         pointLabelFontFamily : "'Arial'",
3167
3168                         //String - Point label font weight
3169                         pointLabelFontStyle : "normal",
3170
3171                         //Number - Point label font size in pixels
3172                         pointLabelFontSize : 10,
3173
3174                         //String - Point label font colour
3175                         pointLabelFontColor : "#666",
3176
3177                         //Boolean - Whether to show a dot for each point
3178                         pointDot : true,
3179
3180                         //Number - Radius of each point dot in pixels
3181                         pointDotRadius : 3,
3182
3183                         //Number - Pixel width of point dot stroke
3184                         pointDotStrokeWidth : 1,
3185
3186                         //Number - amount extra to add to the radius to cater for hit detection outside the drawn point
3187                         pointHitDetectionRadius : 20,
3188
3189                         //Boolean - Whether to show a stroke for datasets
3190                         datasetStroke : true,
3191
3192                         //Number - Pixel width of dataset stroke
3193                         datasetStrokeWidth : 2,
3194
3195                         //Boolean - Whether to fill the dataset with a colour
3196                         datasetFill : true,
3197
3198                         //String - A legend template
3199                         legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"
3200
3201                 },
3202
3203                 initialize: function(data){
3204                         this.PointClass = Chart.Point.extend({
3205                                 strokeWidth : this.options.pointDotStrokeWidth,
3206                                 radius : this.options.pointDotRadius,
3207                                 display: this.options.pointDot,
3208                                 hitDetectionRadius : this.options.pointHitDetectionRadius,
3209                                 ctx : this.chart.ctx
3210                         });
3211
3212                         this.datasets = [];
3213
3214                         this.buildScale(data);
3215
3216                         //Set up tooltip events on the chart
3217                         if (this.options.showTooltips){
3218                                 helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
3219                                         var activePointsCollection = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];
3220
3221                                         this.eachPoints(function(point){
3222                                                 point.restore(['fillColor', 'strokeColor']);
3223                                         });
3224                                         helpers.each(activePointsCollection, function(activePoint){
3225                                                 activePoint.fillColor = activePoint.highlightFill;
3226                                                 activePoint.strokeColor = activePoint.highlightStroke;
3227                                         });
3228
3229                                         this.showTooltip(activePointsCollection);
3230                                 });
3231                         }
3232
3233                         //Iterate through each of the datasets, and build this into a property of the chart
3234                         helpers.each(data.datasets,function(dataset){
3235
3236                                 var datasetObject = {
3237                                         label: dataset.label || null,
3238                                         fillColor : dataset.fillColor,
3239                                         strokeColor : dataset.strokeColor,
3240                                         pointColor : dataset.pointColor,
3241                                         pointStrokeColor : dataset.pointStrokeColor,
3242                                         points : []
3243                                 };
3244
3245                                 this.datasets.push(datasetObject);
3246
3247                                 helpers.each(dataset.data,function(dataPoint,index){
3248                                         //Add a new point for each piece of data, passing any required data to draw.
3249                                         var pointPosition;
3250                                         if (!this.scale.animation){
3251                                                 pointPosition = this.scale.getPointPosition(index, this.scale.calculateCenterOffset(dataPoint));
3252                                         }
3253                                         datasetObject.points.push(new this.PointClass({
3254                                                 value : dataPoint,
3255                                                 label : data.labels[index],
3256                                                 datasetLabel: dataset.label,
3257                                                 x: (this.options.animation) ? this.scale.xCenter : pointPosition.x,
3258                                                 y: (this.options.animation) ? this.scale.yCenter : pointPosition.y,
3259                                                 strokeColor : dataset.pointStrokeColor,
3260                                                 fillColor : dataset.pointColor,
3261                                                 highlightFill : dataset.pointHighlightFill || dataset.pointColor,
3262                                                 highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
3263                                         }));
3264                                 },this);
3265
3266                         },this);
3267
3268                         this.render();
3269                 },
3270                 eachPoints : function(callback){
3271                         helpers.each(this.datasets,function(dataset){
3272                                 helpers.each(dataset.points,callback,this);
3273                         },this);
3274                 },
3275
3276                 getPointsAtEvent : function(evt){
3277                         var mousePosition = helpers.getRelativePosition(evt),
3278                                 fromCenter = helpers.getAngleFromPoint({
3279                                         x: this.scale.xCenter,
3280                                         y: this.scale.yCenter
3281                                 }, mousePosition);
3282
3283                         var anglePerIndex = (Math.PI * 2) /this.scale.valuesCount,
3284                                 pointIndex = Math.round((fromCenter.angle - Math.PI * 1.5) / anglePerIndex),
3285                                 activePointsCollection = [];
3286
3287                         // If we're at the top, make the pointIndex 0 to get the first of the array.
3288                         if (pointIndex >= this.scale.valuesCount || pointIndex < 0){
3289                                 pointIndex = 0;
3290                         }
3291
3292                         if (fromCenter.distance <= this.scale.drawingArea){
3293                                 helpers.each(this.datasets, function(dataset){
3294                                         activePointsCollection.push(dataset.points[pointIndex]);
3295                                 });
3296                         }
3297
3298                         return activePointsCollection;
3299                 },
3300
3301                 buildScale : function(data){
3302                         this.scale = new Chart.RadialScale({
3303                                 display: this.options.showScale,
3304                                 fontStyle: this.options.scaleFontStyle,
3305                                 fontSize: this.options.scaleFontSize,
3306                                 fontFamily: this.options.scaleFontFamily,
3307                                 fontColor: this.options.scaleFontColor,
3308                                 showLabels: this.options.scaleShowLabels,
3309                                 showLabelBackdrop: this.options.scaleShowLabelBackdrop,
3310                                 backdropColor: this.options.scaleBackdropColor,
3311                                 backdropPaddingY : this.options.scaleBackdropPaddingY,
3312                                 backdropPaddingX: this.options.scaleBackdropPaddingX,
3313                                 lineWidth: (this.options.scaleShowLine) ? this.options.scaleLineWidth : 0,
3314                                 lineColor: this.options.scaleLineColor,
3315                                 angleLineColor : this.options.angleLineColor,
3316                                 angleLineWidth : (this.options.angleShowLineOut) ? this.options.angleLineWidth : 0,
3317                                 // Point labels at the edge of each line
3318                                 pointLabelFontColor : this.options.pointLabelFontColor,
3319                                 pointLabelFontSize : this.options.pointLabelFontSize,
3320                                 pointLabelFontFamily : this.options.pointLabelFontFamily,
3321                                 pointLabelFontStyle : this.options.pointLabelFontStyle,
3322                                 height : this.chart.height,
3323                                 width: this.chart.width,
3324                                 xCenter: this.chart.width/2,
3325                                 yCenter: this.chart.height/2,
3326                                 ctx : this.chart.ctx,
3327                                 templateString: this.options.scaleLabel,
3328                                 labels: data.labels,
3329                                 valuesCount: data.datasets[0].data.length
3330                         });
3331
3332                         this.scale.setScaleSize();
3333                         this.updateScaleRange(data.datasets);
3334                         this.scale.buildYLabels();
3335                 },
3336                 updateScaleRange: function(datasets){
3337                         var valuesArray = (function(){
3338                                 var totalDataArray = [];
3339                                 helpers.each(datasets,function(dataset){
3340                                         if (dataset.data){
3341                                                 totalDataArray = totalDataArray.concat(dataset.data);
3342                                         }
3343                                         else {
3344                                                 helpers.each(dataset.points, function(point){
3345                                                         totalDataArray.push(point.value);
3346                                                 });
3347                                         }
3348                                 });
3349                                 return totalDataArray;
3350                         })();
3351
3352
3353                         var scaleSizes = (this.options.scaleOverride) ?
3354                                 {
3355                                         steps: this.options.scaleSteps,
3356                                         stepValue: this.options.scaleStepWidth,
3357                                         min: this.options.scaleStartValue,
3358                                         max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
3359                                 } :
3360                                 helpers.calculateScaleRange(
3361                                         valuesArray,
3362                                         helpers.min([this.chart.width, this.chart.height])/2,
3363                                         this.options.scaleFontSize,
3364                                         this.options.scaleBeginAtZero,
3365                                         this.options.scaleIntegersOnly
3366                                 );
3367
3368                         helpers.extend(
3369                                 this.scale,
3370                                 scaleSizes
3371                         );
3372
3373                 },
3374                 addData : function(valuesArray,label){
3375                         //Map the values array for each of the datasets
3376                         this.scale.valuesCount++;
3377                         helpers.each(valuesArray,function(value,datasetIndex){
3378                                 var pointPosition = this.scale.getPointPosition(this.scale.valuesCount, this.scale.calculateCenterOffset(value));
3379                                 this.datasets[datasetIndex].points.push(new this.PointClass({
3380                                         value : value,
3381                                         label : label,
3382                                         x: pointPosition.x,
3383                                         y: pointPosition.y,
3384                                         strokeColor : this.datasets[datasetIndex].pointStrokeColor,
3385                                         fillColor : this.datasets[datasetIndex].pointColor
3386                                 }));
3387                         },this);
3388
3389                         this.scale.labels.push(label);
3390
3391                         this.reflow();
3392
3393                         this.update();
3394                 },
3395                 removeData : function(){
3396                         this.scale.valuesCount--;
3397                         this.scale.labels.shift();
3398                         helpers.each(this.datasets,function(dataset){
3399                                 dataset.points.shift();
3400                         },this);
3401                         this.reflow();
3402                         this.update();
3403                 },
3404                 update : function(){
3405                         this.eachPoints(function(point){
3406                                 point.save();
3407                         });
3408                         this.reflow();
3409                         this.render();
3410                 },
3411                 reflow: function(){
3412                         helpers.extend(this.scale, {
3413                                 width : this.chart.width,
3414                                 height: this.chart.height,
3415                                 size : helpers.min([this.chart.width, this.chart.height]),
3416                                 xCenter: this.chart.width/2,
3417                                 yCenter: this.chart.height/2
3418                         });
3419                         this.updateScaleRange(this.datasets);
3420                         this.scale.setScaleSize();
3421                         this.scale.buildYLabels();
3422                 },
3423                 draw : function(ease){
3424                         var easeDecimal = ease || 1,
3425                                 ctx = this.chart.ctx;
3426                         this.clear();
3427                         this.scale.draw();
3428
3429                         helpers.each(this.datasets,function(dataset){
3430
3431                                 //Transition each point first so that the line and point drawing isn't out of sync
3432                                 helpers.each(dataset.points,function(point,index){
3433                                         if (point.hasValue()){
3434                                                 point.transition(this.scale.getPointPosition(index, this.scale.calculateCenterOffset(point.value)), easeDecimal);
3435                                         }
3436                                 },this);
3437
3438
3439
3440                                 //Draw the line between all the points
3441                                 ctx.lineWidth = this.options.datasetStrokeWidth;
3442                                 ctx.strokeStyle = dataset.strokeColor;
3443                                 ctx.beginPath();
3444                                 helpers.each(dataset.points,function(point,index){
3445                                         if (index === 0){
3446                                                 ctx.moveTo(point.x,point.y);
3447                                         }
3448                                         else{
3449                                                 ctx.lineTo(point.x,point.y);
3450                                         }
3451                                 },this);
3452                                 ctx.closePath();
3453                                 ctx.stroke();
3454
3455                                 ctx.fillStyle = dataset.fillColor;
3456                                 ctx.fill();
3457
3458                                 //Now draw the points over the line
3459                                 //A little inefficient double looping, but better than the line
3460                                 //lagging behind the point positions
3461                                 helpers.each(dataset.points,function(point){
3462                                         if (point.hasValue()){
3463                                                 point.draw();
3464                                         }
3465                                 });
3466
3467                         },this);
3468
3469                 }
3470
3471         });
3472
3473
3474
3475
3476
3477 }).call(this);