forked from kubernetes/perf-tests
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Chart.js
3477 lines (2955 loc) · 107 KB
/
Chart.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*!
* Chart.js
* http://chartjs.org/
* Version: 1.0.2
*
* Copyright 2015 Nick Downie
* Released under the MIT license
* https://github.com/nnnick/Chart.js/blob/master/LICENSE.md
*/
(function(){
"use strict";
//Declare root variable - window in the browser, global on the server
var root = this,
previous = root.Chart;
//Occupy the global variable of Chart, and create a simple base class
var Chart = function(context){
var chart = this;
this.canvas = context.canvas;
this.ctx = context;
//Variables global to the chart
var computeDimension = function(element,dimension)
{
if (element['offset'+dimension])
{
return element['offset'+dimension];
}
else
{
return document.defaultView.getComputedStyle(element).getPropertyValue(dimension);
}
}
var width = this.width = computeDimension(context.canvas,'Width');
var height = this.height = computeDimension(context.canvas,'Height');
// Firefox requires this to work correctly
context.canvas.width = width;
context.canvas.height = height;
var width = this.width = context.canvas.width;
var height = this.height = context.canvas.height;
this.aspectRatio = this.width / this.height;
//High pixel density displays - multiply the size of the canvas height/width by the device pixel ratio, then scale.
helpers.retinaScale(this);
return this;
};
//Globally expose the defaults to allow for user updating/changing
Chart.defaults = {
global: {
// Boolean - Whether to animate the chart
animation: true,
// Number - Number of animation steps
animationSteps: 60,
// String - Animation easing effect
animationEasing: "easeOutQuart",
// Boolean - If we should show the scale at all
showScale: true,
// Boolean - If we want to override with a hard coded scale
scaleOverride: false,
// ** Required if scaleOverride is true **
// Number - The number of steps in a hard coded scale
scaleSteps: null,
// Number - The value jump in the hard coded scale
scaleStepWidth: null,
// Number - The scale starting value
scaleStartValue: null,
// String - Colour of the scale line
scaleLineColor: "rgba(0,0,0,.1)",
// Number - Pixel width of the scale line
scaleLineWidth: 1,
// Boolean - Whether to show labels on the scale
scaleShowLabels: true,
// Interpolated JS string - can access value
scaleLabel: "<%=value%>",
// Boolean - Whether the scale should stick to integers, and not show any floats even if drawing space is there
scaleIntegersOnly: true,
// Boolean - Whether the scale should start at zero, or an order of magnitude down from the lowest value
scaleBeginAtZero: false,
// String - Scale label font declaration for the scale label
scaleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
// Number - Scale label font size in pixels
scaleFontSize: 12,
// String - Scale label font weight style
scaleFontStyle: "normal",
// String - Scale label font colour
scaleFontColor: "#666",
// Boolean - whether or not the chart should be responsive and resize when the browser does.
responsive: false,
// Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
maintainAspectRatio: true,
// Boolean - Determines whether to draw tooltips on the canvas or not - attaches events to touchmove & mousemove
showTooltips: true,
// Boolean - Determines whether to draw built-in tooltip or call custom tooltip function
customTooltips: false,
// Array - Array of string names to attach tooltip events
tooltipEvents: ["mousemove", "touchstart", "touchmove", "mouseout"],
// String - Tooltip background colour
tooltipFillColor: "rgba(0,0,0,0.8)",
// String - Tooltip label font declaration for the scale label
tooltipFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
// Number - Tooltip label font size in pixels
tooltipFontSize: 14,
// String - Tooltip font weight style
tooltipFontStyle: "normal",
// String - Tooltip label font colour
tooltipFontColor: "#fff",
// String - Tooltip title font declaration for the scale label
tooltipTitleFontFamily: "'Helvetica Neue', 'Helvetica', 'Arial', sans-serif",
// Number - Tooltip title font size in pixels
tooltipTitleFontSize: 14,
// String - Tooltip title font weight style
tooltipTitleFontStyle: "bold",
// String - Tooltip title font colour
tooltipTitleFontColor: "#fff",
// Number - pixel width of padding around tooltip text
tooltipYPadding: 6,
// Number - pixel width of padding around tooltip text
tooltipXPadding: 6,
// Number - Size of the caret on the tooltip
tooltipCaretSize: 8,
// Number - Pixel radius of the tooltip border
tooltipCornerRadius: 6,
// Number - Pixel offset from point x to tooltip edge
tooltipXOffset: 10,
// String - Template string for single tooltips
tooltipTemplate: "<%if (label){%><%=label%>: <%}%><%= value %>",
// String - Template string for single tooltips
multiTooltipTemplate: "<%= value %>",
// String - Colour behind the legend colour block
multiTooltipKeyBackground: '#fff',
// Function - Will fire on animation progression.
onAnimationProgress: function(){},
// Function - Will fire on animation completion.
onAnimationComplete: function(){}
}
};
//Create a dictionary of chart types, to allow for extension of existing types
Chart.types = {};
//Global Chart helpers object for utility methods and classes
var helpers = Chart.helpers = {};
//-- Basic js utility methods
var each = helpers.each = function(loopable,callback,self){
var additionalArgs = Array.prototype.slice.call(arguments, 3);
// Check to see if null or undefined firstly.
if (loopable){
if (loopable.length === +loopable.length){
var i;
for (i=0; i<loopable.length; i++){
callback.apply(self,[loopable[i], i].concat(additionalArgs));
}
}
else{
for (var item in loopable){
callback.apply(self,[loopable[item],item].concat(additionalArgs));
}
}
}
},
clone = helpers.clone = function(obj){
var objClone = {};
each(obj,function(value,key){
if (obj.hasOwnProperty(key)) objClone[key] = value;
});
return objClone;
},
extend = helpers.extend = function(base){
each(Array.prototype.slice.call(arguments,1), function(extensionObject) {
each(extensionObject,function(value,key){
if (extensionObject.hasOwnProperty(key)) base[key] = value;
});
});
return base;
},
merge = helpers.merge = function(base,master){
//Merge properties in left object over to a shallow clone of object right.
var args = Array.prototype.slice.call(arguments,0);
args.unshift({});
return extend.apply(null, args);
},
indexOf = helpers.indexOf = function(arrayToSearch, item){
if (Array.prototype.indexOf) {
return arrayToSearch.indexOf(item);
}
else{
for (var i = 0; i < arrayToSearch.length; i++) {
if (arrayToSearch[i] === item) return i;
}
return -1;
}
},
where = helpers.where = function(collection, filterCallback){
var filtered = [];
helpers.each(collection, function(item){
if (filterCallback(item)){
filtered.push(item);
}
});
return filtered;
},
findNextWhere = helpers.findNextWhere = function(arrayToSearch, filterCallback, startIndex){
// Default to start of the array
if (!startIndex){
startIndex = -1;
}
for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
var currentItem = arrayToSearch[i];
if (filterCallback(currentItem)){
return currentItem;
}
}
},
findPreviousWhere = helpers.findPreviousWhere = function(arrayToSearch, filterCallback, startIndex){
// Default to end of the array
if (!startIndex){
startIndex = arrayToSearch.length;
}
for (var i = startIndex - 1; i >= 0; i--) {
var currentItem = arrayToSearch[i];
if (filterCallback(currentItem)){
return currentItem;
}
}
},
inherits = helpers.inherits = function(extensions){
//Basic javascript inheritance based on the model created in Backbone.js
var parent = this;
var ChartElement = (extensions && extensions.hasOwnProperty("constructor")) ? extensions.constructor : function(){ return parent.apply(this, arguments); };
var Surrogate = function(){ this.constructor = ChartElement;};
Surrogate.prototype = parent.prototype;
ChartElement.prototype = new Surrogate();
ChartElement.extend = inherits;
if (extensions) extend(ChartElement.prototype, extensions);
ChartElement.__super__ = parent.prototype;
return ChartElement;
},
noop = helpers.noop = function(){},
uid = helpers.uid = (function(){
var id=0;
return function(){
return "chart-" + id++;
};
})(),
warn = helpers.warn = function(str){
//Method for warning of errors
if (window.console && typeof window.console.warn == "function") console.warn(str);
},
amd = helpers.amd = (typeof define == 'function' && define.amd),
//-- Math methods
isNumber = helpers.isNumber = function(n){
return !isNaN(parseFloat(n)) && isFinite(n);
},
max = helpers.max = function(array){
return Math.max.apply( Math, array );
},
min = helpers.min = function(array){
return Math.min.apply( Math, array );
},
cap = helpers.cap = function(valueToCap,maxValue,minValue){
if(isNumber(maxValue)) {
if( valueToCap > maxValue ) {
return maxValue;
}
}
else if(isNumber(minValue)){
if ( valueToCap < minValue ){
return minValue;
}
}
return valueToCap;
},
getDecimalPlaces = helpers.getDecimalPlaces = function(num){
if (num%1!==0 && isNumber(num)){
return num.toString().split(".")[1].length;
}
else {
return 0;
}
},
toRadians = helpers.radians = function(degrees){
return degrees * (Math.PI/180);
},
// Gets the angle from vertical upright to the point about a centre.
getAngleFromPoint = helpers.getAngleFromPoint = function(centrePoint, anglePoint){
var distanceFromXCenter = anglePoint.x - centrePoint.x,
distanceFromYCenter = anglePoint.y - centrePoint.y,
radialDistanceFromCenter = Math.sqrt( distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);
var angle = Math.PI * 2 + Math.atan2(distanceFromYCenter, distanceFromXCenter);
//If the segment is in the top left quadrant, we need to add another rotation to the angle
if (distanceFromXCenter < 0 && distanceFromYCenter < 0){
angle += Math.PI*2;
}
return {
angle: angle,
distance: radialDistanceFromCenter
};
},
aliasPixel = helpers.aliasPixel = function(pixelWidth){
return (pixelWidth % 2 === 0) ? 0 : 0.5;
},
splineCurve = helpers.splineCurve = function(FirstPoint,MiddlePoint,AfterPoint,t){
//Props to Rob Spencer at scaled innovation for his post on splining between points
//http://scaledinnovation.com/analytics/splines/aboutSplines.html
var d01=Math.sqrt(Math.pow(MiddlePoint.x-FirstPoint.x,2)+Math.pow(MiddlePoint.y-FirstPoint.y,2)),
d12=Math.sqrt(Math.pow(AfterPoint.x-MiddlePoint.x,2)+Math.pow(AfterPoint.y-MiddlePoint.y,2)),
fa=t*d01/(d01+d12),// scaling factor for triangle Ta
fb=t*d12/(d01+d12);
return {
inner : {
x : MiddlePoint.x-fa*(AfterPoint.x-FirstPoint.x),
y : MiddlePoint.y-fa*(AfterPoint.y-FirstPoint.y)
},
outer : {
x: MiddlePoint.x+fb*(AfterPoint.x-FirstPoint.x),
y : MiddlePoint.y+fb*(AfterPoint.y-FirstPoint.y)
}
};
},
calculateOrderOfMagnitude = helpers.calculateOrderOfMagnitude = function(val){
return Math.floor(Math.log(val) / Math.LN10);
},
calculateScaleRange = helpers.calculateScaleRange = function(valuesArray, drawingSize, textSize, startFromZero, integersOnly){
//Set a minimum step of two - a point at the top of the graph, and a point at the base
var minSteps = 2,
maxSteps = Math.floor(drawingSize/(textSize * 1.5)),
skipFitting = (minSteps >= maxSteps);
var maxValue = max(valuesArray),
minValue = min(valuesArray);
// We need some degree of seperation here to calculate the scales if all the values are the same
// Adding/minusing 0.5 will give us a range of 1.
if (maxValue === minValue){
maxValue += 0.5;
// So we don't end up with a graph with a negative start value if we've said always start from zero
if (minValue >= 0.5 && !startFromZero){
minValue -= 0.5;
}
else{
// Make up a whole number above the values
maxValue += 0.5;
}
}
var valueRange = Math.abs(maxValue - minValue),
rangeOrderOfMagnitude = calculateOrderOfMagnitude(valueRange),
graphMax = Math.ceil(maxValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
graphMin = (startFromZero) ? 0 : Math.floor(minValue / (1 * Math.pow(10, rangeOrderOfMagnitude))) * Math.pow(10, rangeOrderOfMagnitude),
graphRange = graphMax - graphMin,
stepValue = Math.pow(10, rangeOrderOfMagnitude),
numberOfSteps = Math.round(graphRange / stepValue);
//If we have more space on the graph we'll use it to give more definition to the data
while((numberOfSteps > maxSteps || (numberOfSteps * 2) < maxSteps) && !skipFitting) {
if(numberOfSteps > maxSteps){
stepValue *=2;
numberOfSteps = Math.round(graphRange/stepValue);
// Don't ever deal with a decimal number of steps - cancel fitting and just use the minimum number of steps.
if (numberOfSteps % 1 !== 0){
skipFitting = true;
}
}
//We can fit in double the amount of scale points on the scale
else{
//If user has declared ints only, and the step value isn't a decimal
if (integersOnly && rangeOrderOfMagnitude >= 0){
//If the user has said integers only, we need to check that making the scale more granular wouldn't make it a float
if(stepValue/2 % 1 === 0){
stepValue /=2;
numberOfSteps = Math.round(graphRange/stepValue);
}
//If it would make it a float break out of the loop
else{
break;
}
}
//If the scale doesn't have to be an int, make the scale more granular anyway.
else{
stepValue /=2;
numberOfSteps = Math.round(graphRange/stepValue);
}
}
}
if (skipFitting){
numberOfSteps = minSteps;
stepValue = graphRange / numberOfSteps;
}
return {
steps : numberOfSteps,
stepValue : stepValue,
min : graphMin,
max : graphMin + (numberOfSteps * stepValue)
};
},
/* jshint ignore:start */
// Blows up jshint errors based on the new Function constructor
//Templating methods
//Javascript micro templating by John Resig - source at http://ejohn.org/blog/javascript-micro-templating/
template = helpers.template = function(templateString, valuesObject){
// If templateString is function rather than string-template - call the function for valuesObject
if(templateString instanceof Function){
return templateString(valuesObject);
}
var cache = {};
function tmpl(str, data){
// Figure out if we're getting a template, or if we need to
// load the template - and be sure to cache the result.
var fn = !/\W/.test(str) ?
cache[str] = cache[str] :
// Generate a reusable function that will serve as a template
// generator (and which will be cached).
new Function("obj",
"var p=[],print=function(){p.push.apply(p,arguments);};" +
// Introduce the data as local variables using with(){}
"with(obj){p.push('" +
// Convert the template into pure JavaScript
str
.replace(/[\r\t\n]/g, " ")
.split("<%").join("\t")
.replace(/((^|%>)[^\t]*)'/g, "$1\r")
.replace(/\t=(.*?)%>/g, "',$1,'")
.split("\t").join("');")
.split("%>").join("p.push('")
.split("\r").join("\\'") +
"');}return p.join('');"
);
// Provide some basic currying to the user
return data ? fn( data ) : fn;
}
return tmpl(templateString,valuesObject);
},
/* jshint ignore:end */
generateLabels = helpers.generateLabels = function(templateString,numberOfSteps,graphMin,stepValue){
var labelsArray = new Array(numberOfSteps);
if (labelTemplateString){
each(labelsArray,function(val,index){
labelsArray[index] = template(templateString,{value: (graphMin + (stepValue*(index+1)))});
});
}
return labelsArray;
},
//--Animation methods
//Easing functions adapted from Robert Penner's easing equations
//http://www.robertpenner.com/easing/
easingEffects = helpers.easingEffects = {
linear: function (t) {
return t;
},
easeInQuad: function (t) {
return t * t;
},
easeOutQuad: function (t) {
return -1 * t * (t - 2);
},
easeInOutQuad: function (t) {
if ((t /= 1 / 2) < 1) return 1 / 2 * t * t;
return -1 / 2 * ((--t) * (t - 2) - 1);
},
easeInCubic: function (t) {
return t * t * t;
},
easeOutCubic: function (t) {
return 1 * ((t = t / 1 - 1) * t * t + 1);
},
easeInOutCubic: function (t) {
if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t;
return 1 / 2 * ((t -= 2) * t * t + 2);
},
easeInQuart: function (t) {
return t * t * t * t;
},
easeOutQuart: function (t) {
return -1 * ((t = t / 1 - 1) * t * t * t - 1);
},
easeInOutQuart: function (t) {
if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t;
return -1 / 2 * ((t -= 2) * t * t * t - 2);
},
easeInQuint: function (t) {
return 1 * (t /= 1) * t * t * t * t;
},
easeOutQuint: function (t) {
return 1 * ((t = t / 1 - 1) * t * t * t * t + 1);
},
easeInOutQuint: function (t) {
if ((t /= 1 / 2) < 1) return 1 / 2 * t * t * t * t * t;
return 1 / 2 * ((t -= 2) * t * t * t * t + 2);
},
easeInSine: function (t) {
return -1 * Math.cos(t / 1 * (Math.PI / 2)) + 1;
},
easeOutSine: function (t) {
return 1 * Math.sin(t / 1 * (Math.PI / 2));
},
easeInOutSine: function (t) {
return -1 / 2 * (Math.cos(Math.PI * t / 1) - 1);
},
easeInExpo: function (t) {
return (t === 0) ? 1 : 1 * Math.pow(2, 10 * (t / 1 - 1));
},
easeOutExpo: function (t) {
return (t === 1) ? 1 : 1 * (-Math.pow(2, -10 * t / 1) + 1);
},
easeInOutExpo: function (t) {
if (t === 0) return 0;
if (t === 1) return 1;
if ((t /= 1 / 2) < 1) return 1 / 2 * Math.pow(2, 10 * (t - 1));
return 1 / 2 * (-Math.pow(2, -10 * --t) + 2);
},
easeInCirc: function (t) {
if (t >= 1) return t;
return -1 * (Math.sqrt(1 - (t /= 1) * t) - 1);
},
easeOutCirc: function (t) {
return 1 * Math.sqrt(1 - (t = t / 1 - 1) * t);
},
easeInOutCirc: function (t) {
if ((t /= 1 / 2) < 1) return -1 / 2 * (Math.sqrt(1 - t * t) - 1);
return 1 / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1);
},
easeInElastic: function (t) {
var s = 1.70158;
var p = 0;
var a = 1;
if (t === 0) return 0;
if ((t /= 1) == 1) return 1;
if (!p) p = 1 * 0.3;
if (a < Math.abs(1)) {
a = 1;
s = p / 4;
} else s = p / (2 * Math.PI) * Math.asin(1 / a);
return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
},
easeOutElastic: function (t) {
var s = 1.70158;
var p = 0;
var a = 1;
if (t === 0) return 0;
if ((t /= 1) == 1) return 1;
if (!p) p = 1 * 0.3;
if (a < Math.abs(1)) {
a = 1;
s = p / 4;
} else s = p / (2 * Math.PI) * Math.asin(1 / a);
return a * Math.pow(2, -10 * t) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) + 1;
},
easeInOutElastic: function (t) {
var s = 1.70158;
var p = 0;
var a = 1;
if (t === 0) return 0;
if ((t /= 1 / 2) == 2) return 1;
if (!p) p = 1 * (0.3 * 1.5);
if (a < Math.abs(1)) {
a = 1;
s = p / 4;
} else s = p / (2 * Math.PI) * Math.asin(1 / a);
if (t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p));
return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * 1 - s) * (2 * Math.PI) / p) * 0.5 + 1;
},
easeInBack: function (t) {
var s = 1.70158;
return 1 * (t /= 1) * t * ((s + 1) * t - s);
},
easeOutBack: function (t) {
var s = 1.70158;
return 1 * ((t = t / 1 - 1) * t * ((s + 1) * t + s) + 1);
},
easeInOutBack: function (t) {
var s = 1.70158;
if ((t /= 1 / 2) < 1) return 1 / 2 * (t * t * (((s *= (1.525)) + 1) * t - s));
return 1 / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);
},
easeInBounce: function (t) {
return 1 - easingEffects.easeOutBounce(1 - t);
},
easeOutBounce: function (t) {
if ((t /= 1) < (1 / 2.75)) {
return 1 * (7.5625 * t * t);
} else if (t < (2 / 2.75)) {
return 1 * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75);
} else if (t < (2.5 / 2.75)) {
return 1 * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375);
} else {
return 1 * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375);
}
},
easeInOutBounce: function (t) {
if (t < 1 / 2) return easingEffects.easeInBounce(t * 2) * 0.5;
return easingEffects.easeOutBounce(t * 2 - 1) * 0.5 + 1 * 0.5;
}
},
//Request animation polyfill - http://www.paulirish.com/2011/requestanimationframe-for-smart-animating/
requestAnimFrame = helpers.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function(callback) {
return window.setTimeout(callback, 1000 / 60);
};
})(),
cancelAnimFrame = helpers.cancelAnimFrame = (function(){
return window.cancelAnimationFrame ||
window.webkitCancelAnimationFrame ||
window.mozCancelAnimationFrame ||
window.oCancelAnimationFrame ||
window.msCancelAnimationFrame ||
function(callback) {
return window.clearTimeout(callback, 1000 / 60);
};
})(),
animationLoop = helpers.animationLoop = function(callback,totalSteps,easingString,onProgress,onComplete,chartInstance){
var currentStep = 0,
easingFunction = easingEffects[easingString] || easingEffects.linear;
var animationFrame = function(){
currentStep++;
var stepDecimal = currentStep/totalSteps;
var easeDecimal = easingFunction(stepDecimal);
callback.call(chartInstance,easeDecimal,stepDecimal, currentStep);
onProgress.call(chartInstance,easeDecimal,stepDecimal);
if (currentStep < totalSteps){
chartInstance.animationFrame = requestAnimFrame(animationFrame);
} else{
onComplete.apply(chartInstance);
}
};
requestAnimFrame(animationFrame);
},
//-- DOM methods
getRelativePosition = helpers.getRelativePosition = function(evt){
var mouseX, mouseY;
var e = evt.originalEvent || evt,
canvas = evt.currentTarget || evt.srcElement,
boundingRect = canvas.getBoundingClientRect();
if (e.touches){
mouseX = e.touches[0].clientX - boundingRect.left;
mouseY = e.touches[0].clientY - boundingRect.top;
}
else{
mouseX = e.clientX - boundingRect.left;
mouseY = e.clientY - boundingRect.top;
}
return {
x : mouseX,
y : mouseY
};
},
addEvent = helpers.addEvent = function(node,eventType,method){
if (node.addEventListener){
node.addEventListener(eventType,method);
} else if (node.attachEvent){
node.attachEvent("on"+eventType, method);
} else {
node["on"+eventType] = method;
}
},
removeEvent = helpers.removeEvent = function(node, eventType, handler){
if (node.removeEventListener){
node.removeEventListener(eventType, handler, false);
} else if (node.detachEvent){
node.detachEvent("on"+eventType,handler);
} else{
node["on" + eventType] = noop;
}
},
bindEvents = helpers.bindEvents = function(chartInstance, arrayOfEvents, handler){
// Create the events object if it's not already present
if (!chartInstance.events) chartInstance.events = {};
each(arrayOfEvents,function(eventName){
chartInstance.events[eventName] = function(){
handler.apply(chartInstance, arguments);
};
addEvent(chartInstance.chart.canvas,eventName,chartInstance.events[eventName]);
});
},
unbindEvents = helpers.unbindEvents = function (chartInstance, arrayOfEvents) {
each(arrayOfEvents, function(handler,eventName){
removeEvent(chartInstance.chart.canvas, eventName, handler);
});
},
getMaximumWidth = helpers.getMaximumWidth = function(domNode){
var container = domNode.parentNode;
// TODO = check cross browser stuff with this.
return container.clientWidth;
},
getMaximumHeight = helpers.getMaximumHeight = function(domNode){
var container = domNode.parentNode;
// TODO = check cross browser stuff with this.
return container.clientHeight;
},
getMaximumSize = helpers.getMaximumSize = helpers.getMaximumWidth, // legacy support
retinaScale = helpers.retinaScale = function(chart){
var ctx = chart.ctx,
width = chart.canvas.width,
height = chart.canvas.height;
if (window.devicePixelRatio) {
ctx.canvas.style.width = width + "px";
ctx.canvas.style.height = height + "px";
ctx.canvas.height = height * window.devicePixelRatio;
ctx.canvas.width = width * window.devicePixelRatio;
ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
}
},
//-- Canvas methods
clear = helpers.clear = function(chart){
chart.ctx.clearRect(0,0,chart.width,chart.height);
},
fontString = helpers.fontString = function(pixelSize,fontStyle,fontFamily){
return fontStyle + " " + pixelSize+"px " + fontFamily;
},
longestText = helpers.longestText = function(ctx,font,arrayOfStrings){
ctx.font = font;
var longest = 0;
each(arrayOfStrings,function(string){
var textWidth = ctx.measureText(string).width;
longest = (textWidth > longest) ? textWidth : longest;
});
return longest;
},
drawRoundedRectangle = helpers.drawRoundedRectangle = function(ctx,x,y,width,height,radius){
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
};
//Store a reference to each instance - allowing us to globally resize chart instances on window resize.
//Destroy method on the chart will remove the instance of the chart from this reference.
Chart.instances = {};
Chart.Type = function(data,options,chart){
this.options = options;
this.chart = chart;
this.id = uid();
//Add the chart instance to the global namespace
Chart.instances[this.id] = this;
// Initialize is always called when a chart type is created
// By default it is a no op, but it should be extended
if (options.responsive){
this.resize();
}
this.initialize.call(this,data);
};
//Core methods that'll be a part of every chart type
extend(Chart.Type.prototype,{
initialize : function(){return this;},
clear : function(){
clear(this.chart);
return this;
},
stop : function(){
// Stops any current animation loop occuring
cancelAnimFrame(this.animationFrame);
return this;
},
resize : function(callback){
this.stop();
var canvas = this.chart.canvas,
newWidth = getMaximumWidth(this.chart.canvas),
newHeight = this.options.maintainAspectRatio ? newWidth / this.chart.aspectRatio : getMaximumHeight(this.chart.canvas);
canvas.width = this.chart.width = newWidth;
canvas.height = this.chart.height = newHeight;
retinaScale(this.chart);
if (typeof callback === "function"){
callback.apply(this, Array.prototype.slice.call(arguments, 1));
}
return this;
},
reflow : noop,
render : function(reflow){
if (reflow){
this.reflow();
}
if (this.options.animation && !reflow){
helpers.animationLoop(
this.draw,
this.options.animationSteps,
this.options.animationEasing,
this.options.onAnimationProgress,
this.options.onAnimationComplete,
this
);
}
else{
this.draw();
this.options.onAnimationComplete.call(this);
}
return this;
},
generateLegend : function(){
return template(this.options.legendTemplate,this);
},
destroy : function(){
this.clear();
unbindEvents(this, this.events);
var canvas = this.chart.canvas;
// Reset canvas height/width attributes starts a fresh with the canvas context
canvas.width = this.chart.width;
canvas.height = this.chart.height;
// < IE9 doesn't support removeProperty
if (canvas.style.removeProperty) {
canvas.style.removeProperty('width');
canvas.style.removeProperty('height');
} else {
canvas.style.removeAttribute('width');
canvas.style.removeAttribute('height');
}
delete Chart.instances[this.id];
},
showTooltip : function(ChartElements, forceRedraw){
// Only redraw the chart if we've actually changed what we're hovering on.
if (typeof this.activeElements === 'undefined') this.activeElements = [];
var isChanged = (function(Elements){
var changed = false;
if (Elements.length !== this.activeElements.length){
changed = true;
return changed;
}
each(Elements, function(element, index){
if (element !== this.activeElements[index]){
changed = true;
}
}, this);
return changed;
}).call(this, ChartElements);
if (!isChanged && !forceRedraw){
return;
}
else{
this.activeElements = ChartElements;
}
this.draw();
if(this.options.customTooltips){
this.options.customTooltips(false);
}
if (ChartElements.length > 0){
// If we have multiple datasets, show a MultiTooltip for all of the data points at that index
if (this.datasets && this.datasets.length > 1) {
var dataArray,
dataIndex;
for (var i = this.datasets.length - 1; i >= 0; i--) {
dataArray = this.datasets[i].points || this.datasets[i].bars || this.datasets[i].segments;
dataIndex = indexOf(dataArray, ChartElements[0]);
if (dataIndex !== -1){
break;
}
}
var tooltipLabels = [],
tooltipColors = [],
medianPosition = (function(index) {
// Get all the points at that particular index
var Elements = [],
dataCollection,
xPositions = [],
yPositions = [],
xMax,
yMax,
xMin,
yMin;
helpers.each(this.datasets, function(dataset){
dataCollection = dataset.points || dataset.bars || dataset.segments;
if (dataCollection[dataIndex] && dataCollection[dataIndex].hasValue()){
Elements.push(dataCollection[dataIndex]);
}
});
helpers.each(Elements, function(element) {
xPositions.push(element.x);
yPositions.push(element.y);
//Include any colour information about the element
tooltipLabels.push(helpers.template(this.options.multiTooltipTemplate, element));
tooltipColors.push({
fill: element._saved.fillColor || element.fillColor,
stroke: element._saved.strokeColor || element.strokeColor
});
}, this);
yMin = min(yPositions);
yMax = max(yPositions);
xMin = min(xPositions);
xMax = max(xPositions);
return {
x: (xMin > this.chart.width/2) ? xMin : xMax,
y: (yMin + yMax)/2
};
}).call(this, dataIndex);
new Chart.MultiTooltip({
x: medianPosition.x,