-
-
Notifications
You must be signed in to change notification settings - Fork 1.9k
/
plot.js
1180 lines (985 loc) · 42.1 KB
/
plot.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
'use strict';
var d3 = require('@plotly/d3');
var Plots = require('../../plots/plots');
var Fx = require('../../components/fx');
var Color = require('../../components/color');
var Drawing = require('../../components/drawing');
var Lib = require('../../lib');
var strScale = Lib.strScale;
var strTranslate = Lib.strTranslate;
var svgTextUtils = require('../../lib/svg_text_utils');
var uniformText = require('../bar/uniform_text');
var recordMinTextSize = uniformText.recordMinTextSize;
var clearMinTextSize = uniformText.clearMinTextSize;
var TEXTPAD = require('../bar/constants').TEXTPAD;
var helpers = require('./helpers');
var eventData = require('./event_data');
var isValidTextValue = require('../../lib').isValidTextValue;
function plot(gd, cdModule) {
var isStatic = gd._context.staticPlot;
var fullLayout = gd._fullLayout;
var gs = fullLayout._size;
clearMinTextSize('pie', fullLayout);
prerenderTitles(cdModule, gd);
layoutAreas(cdModule, gs);
var plotGroups = Lib.makeTraceGroups(fullLayout._pielayer, cdModule, 'trace').each(function(cd) {
var plotGroup = d3.select(this);
var cd0 = cd[0];
var trace = cd0.trace;
setCoords(cd);
// TODO: miter might look better but can sometimes cause problems
// maybe miter with a small-ish stroke-miterlimit?
plotGroup.attr('stroke-linejoin', 'round');
plotGroup.each(function() {
var slices = d3.select(this).selectAll('g.slice').data(cd);
slices.enter().append('g')
.classed('slice', true);
slices.exit().remove();
var quadrants = [
[[], []], // y<0: x<0, x>=0
[[], []] // y>=0: x<0, x>=0
];
var hasOutsideText = false;
slices.each(function(pt, i) {
if(pt.hidden) {
d3.select(this).selectAll('path,g').remove();
return;
}
// to have consistent event data compared to other traces
pt.pointNumber = pt.i;
pt.curveNumber = trace.index;
quadrants[pt.pxmid[1] < 0 ? 0 : 1][pt.pxmid[0] < 0 ? 0 : 1].push(pt);
var cx = cd0.cx;
var cy = cd0.cy;
var sliceTop = d3.select(this);
var slicePath = sliceTop.selectAll('path.surface').data([pt]);
slicePath.enter().append('path')
.classed('surface', true)
.style({'pointer-events': isStatic ? 'none' : 'all'});
sliceTop.call(attachFxHandlers, gd, cd);
if(trace.pull) {
var pull = +helpers.castOption(trace.pull, pt.pts) || 0;
if(pull > 0) {
cx += pull * pt.pxmid[0];
cy += pull * pt.pxmid[1];
}
}
pt.cxFinal = cx;
pt.cyFinal = cy;
function arc(start, finish, cw, scale) {
var dx = scale * (finish[0] - start[0]);
var dy = scale * (finish[1] - start[1]);
return 'a' +
(scale * cd0.r) + ',' + (scale * cd0.r) + ' 0 ' +
pt.largeArc + (cw ? ' 1 ' : ' 0 ') + dx + ',' + dy;
}
var hole = trace.hole;
if(pt.v === cd0.vTotal) { // 100% fails bcs arc start and end are identical
var outerCircle = 'M' + (cx + pt.px0[0]) + ',' + (cy + pt.px0[1]) +
arc(pt.px0, pt.pxmid, true, 1) +
arc(pt.pxmid, pt.px0, true, 1) + 'Z';
if(hole) {
slicePath.attr('d',
'M' + (cx + hole * pt.px0[0]) + ',' + (cy + hole * pt.px0[1]) +
arc(pt.px0, pt.pxmid, false, hole) +
arc(pt.pxmid, pt.px0, false, hole) +
'Z' + outerCircle);
} else slicePath.attr('d', outerCircle);
} else {
var outerArc = arc(pt.px0, pt.px1, true, 1);
if(hole) {
var rim = 1 - hole;
slicePath.attr('d',
'M' + (cx + hole * pt.px1[0]) + ',' + (cy + hole * pt.px1[1]) +
arc(pt.px1, pt.px0, false, hole) +
'l' + (rim * pt.px0[0]) + ',' + (rim * pt.px0[1]) +
outerArc +
'Z');
} else {
slicePath.attr('d',
'M' + cx + ',' + cy +
'l' + pt.px0[0] + ',' + pt.px0[1] +
outerArc +
'Z');
}
}
// add text
formatSliceLabel(gd, pt, cd0);
var textPosition = helpers.castOption(trace.textposition, pt.pts);
var sliceTextGroup = sliceTop.selectAll('g.slicetext')
.data(pt.text && (textPosition !== 'none') ? [0] : []);
sliceTextGroup.enter().append('g')
.classed('slicetext', true);
sliceTextGroup.exit().remove();
sliceTextGroup.each(function() {
var sliceText = Lib.ensureSingle(d3.select(this), 'text', '', function(s) {
// prohibit tex interpretation until we can handle
// tex and regular text together
s.attr('data-notex', 1);
});
var font = Lib.ensureUniformFontSize(gd, textPosition === 'outside' ?
determineOutsideTextFont(trace, pt, fullLayout.font) :
determineInsideTextFont(trace, pt, fullLayout.font)
);
sliceText.text(pt.text)
.attr({
class: 'slicetext',
transform: '',
'text-anchor': 'middle'
})
.call(Drawing.font, font)
.call(svgTextUtils.convertToTspans, gd);
// position the text relative to the slice
var textBB = Drawing.bBox(sliceText.node());
var transform;
if(textPosition === 'outside') {
transform = transformOutsideText(textBB, pt);
} else {
transform = transformInsideText(textBB, pt, cd0);
if(textPosition === 'auto' && transform.scale < 1) {
var newFont = Lib.ensureUniformFontSize(gd, trace.outsidetextfont);
sliceText.call(Drawing.font, newFont);
textBB = Drawing.bBox(sliceText.node());
transform = transformOutsideText(textBB, pt);
}
}
var textPosAngle = transform.textPosAngle;
var textXY = textPosAngle === undefined ? pt.pxmid : getCoords(cd0.r, textPosAngle);
transform.targetX = cx + textXY[0] * transform.rCenter + (transform.x || 0);
transform.targetY = cy + textXY[1] * transform.rCenter + (transform.y || 0);
computeTransform(transform, textBB);
// save some stuff to use later ensure no labels overlap
if(transform.outside) {
var targetY = transform.targetY;
pt.yLabelMin = targetY - textBB.height / 2;
pt.yLabelMid = targetY;
pt.yLabelMax = targetY + textBB.height / 2;
pt.labelExtraX = 0;
pt.labelExtraY = 0;
hasOutsideText = true;
}
transform.fontSize = font.size;
recordMinTextSize(trace.type, transform, fullLayout);
cd[i].transform = transform;
Lib.setTransormAndDisplay(sliceText, transform);
});
});
// add the title
var titleTextGroup = d3.select(this).selectAll('g.titletext')
.data(trace.title.text ? [0] : []);
titleTextGroup.enter().append('g')
.classed('titletext', true);
titleTextGroup.exit().remove();
titleTextGroup.each(function() {
var titleText = Lib.ensureSingle(d3.select(this), 'text', '', function(s) {
// prohibit tex interpretation as above
s.attr('data-notex', 1);
});
var txt = trace.title.text;
if(trace._meta) {
txt = Lib.templateString(txt, trace._meta);
}
titleText.text(txt)
.attr({
class: 'titletext',
transform: '',
'text-anchor': 'middle',
})
.call(Drawing.font, trace.title.font)
.call(svgTextUtils.convertToTspans, gd);
var transform;
if(trace.title.position === 'middle center') {
transform = positionTitleInside(cd0);
} else {
transform = positionTitleOutside(cd0, gs);
}
titleText.attr('transform',
strTranslate(transform.x, transform.y) +
strScale(Math.min(1, transform.scale)) +
strTranslate(transform.tx, transform.ty));
});
// now make sure no labels overlap (at least within one pie)
if(hasOutsideText) scootLabels(quadrants, trace);
plotTextLines(slices, trace);
if(hasOutsideText && trace.automargin) {
// TODO if we ever want to improve perf,
// we could reuse the textBB computed above together
// with the sliceText transform info
var traceBbox = Drawing.bBox(plotGroup.node());
var domain = trace.domain;
var vpw = gs.w * (domain.x[1] - domain.x[0]);
var vph = gs.h * (domain.y[1] - domain.y[0]);
var xgap = (0.5 * vpw - cd0.r) / gs.w;
var ygap = (0.5 * vph - cd0.r) / gs.h;
Plots.autoMargin(gd, 'pie.' + trace.uid + '.automargin', {
xl: domain.x[0] - xgap,
xr: domain.x[1] + xgap,
yb: domain.y[0] - ygap,
yt: domain.y[1] + ygap,
l: Math.max(cd0.cx - cd0.r - traceBbox.left, 0),
r: Math.max(traceBbox.right - (cd0.cx + cd0.r), 0),
b: Math.max(traceBbox.bottom - (cd0.cy + cd0.r), 0),
t: Math.max(cd0.cy - cd0.r - traceBbox.top, 0),
pad: 5
});
}
});
});
// This is for a bug in Chrome (as of 2015-07-22, and does not affect FF)
// if insidetextfont and outsidetextfont are different sizes, sometimes the size
// of an "em" gets taken from the wrong element at first so lines are
// spaced wrong. You just have to tell it to try again later and it gets fixed.
// I have no idea why we haven't seen this in other contexts. Also, sometimes
// it gets the initial draw correct but on redraw it gets confused.
setTimeout(function() {
plotGroups.selectAll('tspan').each(function() {
var s = d3.select(this);
if(s.attr('dy')) s.attr('dy', s.attr('dy'));
});
}, 0);
}
// TODO add support for transition
function plotTextLines(slices, trace) {
slices.each(function(pt) {
var sliceTop = d3.select(this);
if(!pt.labelExtraX && !pt.labelExtraY) {
sliceTop.select('path.textline').remove();
return;
}
// first move the text to its new location
var sliceText = sliceTop.select('g.slicetext text');
pt.transform.targetX += pt.labelExtraX;
pt.transform.targetY += pt.labelExtraY;
Lib.setTransormAndDisplay(sliceText, pt.transform);
// then add a line to the new location
var lineStartX = pt.cxFinal + pt.pxmid[0];
var lineStartY = pt.cyFinal + pt.pxmid[1];
var textLinePath = 'M' + lineStartX + ',' + lineStartY;
var finalX = (pt.yLabelMax - pt.yLabelMin) * (pt.pxmid[0] < 0 ? -1 : 1) / 4;
if(pt.labelExtraX) {
var yFromX = pt.labelExtraX * pt.pxmid[1] / pt.pxmid[0];
var yNet = pt.yLabelMid + pt.labelExtraY - (pt.cyFinal + pt.pxmid[1]);
if(Math.abs(yFromX) > Math.abs(yNet)) {
textLinePath +=
'l' + (yNet * pt.pxmid[0] / pt.pxmid[1]) + ',' + yNet +
'H' + (lineStartX + pt.labelExtraX + finalX);
} else {
textLinePath += 'l' + pt.labelExtraX + ',' + yFromX +
'v' + (yNet - yFromX) +
'h' + finalX;
}
} else {
textLinePath +=
'V' + (pt.yLabelMid + pt.labelExtraY) +
'h' + finalX;
}
Lib.ensureSingle(sliceTop, 'path', 'textline')
.call(Color.stroke, trace.outsidetextfont.color)
.attr({
'stroke-width': Math.min(2, trace.outsidetextfont.size / 8),
d: textLinePath,
fill: 'none'
});
});
}
function attachFxHandlers(sliceTop, gd, cd) {
var cd0 = cd[0];
var cx = cd0.cx;
var cy = cd0.cy;
var trace = cd0.trace;
var isFunnelArea = trace.type === 'funnelarea';
// hover state vars
// have we drawn a hover label, so it should be cleared later
if(!('_hasHoverLabel' in trace)) trace._hasHoverLabel = false;
// have we emitted a hover event, so later an unhover event should be emitted
// note that click events do not depend on this - you can still get them
// with hovermode: false or if you were earlier dragging, then clicked
// in the same slice that you moused up in
if(!('_hasHoverEvent' in trace)) trace._hasHoverEvent = false;
sliceTop.on('mouseover', function(pt) {
// in case fullLayout or fullData has changed without a replot
var fullLayout2 = gd._fullLayout;
var trace2 = gd._fullData[trace.index];
if(gd._dragging || fullLayout2.hovermode === false) return;
var hoverinfo = trace2.hoverinfo;
if(Array.isArray(hoverinfo)) {
// super hacky: we need to pull out the *first* hoverinfo from
// pt.pts, then put it back into an array in a dummy trace
// and call castHoverinfo on that.
// TODO: do we want to have Fx.castHoverinfo somehow handle this?
// it already takes an array for index, for 2D, so this seems tricky.
hoverinfo = Fx.castHoverinfo({
hoverinfo: [helpers.castOption(hoverinfo, pt.pts)],
_module: trace._module
}, fullLayout2, 0);
}
if(hoverinfo === 'all') hoverinfo = 'label+text+value+percent+name';
// in case we dragged over the pie from another subplot,
// or if hover is turned off
if(trace2.hovertemplate || (hoverinfo !== 'none' && hoverinfo !== 'skip' && hoverinfo)) {
var rInscribed = pt.rInscribed || 0;
var hoverCenterX = cx + pt.pxmid[0] * (1 - rInscribed);
var hoverCenterY = cy + pt.pxmid[1] * (1 - rInscribed);
var separators = fullLayout2.separators;
var text = [];
if(hoverinfo && hoverinfo.indexOf('label') !== -1) text.push(pt.label);
pt.text = helpers.castOption(trace2.hovertext || trace2.text, pt.pts);
if(hoverinfo && hoverinfo.indexOf('text') !== -1) {
var tx = pt.text;
if(Lib.isValidTextValue(tx)) text.push(tx);
}
pt.value = pt.v;
pt.valueLabel = helpers.formatPieValue(pt.v, separators);
if(hoverinfo && hoverinfo.indexOf('value') !== -1) text.push(pt.valueLabel);
pt.percent = pt.v / cd0.vTotal;
pt.percentLabel = helpers.formatPiePercent(pt.percent, separators);
if(hoverinfo && hoverinfo.indexOf('percent') !== -1) text.push(pt.percentLabel);
var hoverLabel = trace2.hoverlabel;
var hoverFont = hoverLabel.font;
var bbox = [];
Fx.loneHover({
trace: trace,
x0: hoverCenterX - rInscribed * cd0.r,
x1: hoverCenterX + rInscribed * cd0.r,
y: hoverCenterY,
_x0: isFunnelArea ? cx + pt.TL[0] : hoverCenterX - rInscribed * cd0.r,
_x1: isFunnelArea ? cx + pt.TR[0] : hoverCenterX + rInscribed * cd0.r,
_y0: isFunnelArea ? cy + pt.TL[1] : hoverCenterY - rInscribed * cd0.r,
_y1: isFunnelArea ? cy + pt.BL[1] : hoverCenterY + rInscribed * cd0.r,
text: text.join('<br>'),
name: (trace2.hovertemplate || hoverinfo.indexOf('name') !== -1) ? trace2.name : undefined,
idealAlign: pt.pxmid[0] < 0 ? 'left' : 'right',
color: helpers.castOption(hoverLabel.bgcolor, pt.pts) || pt.color,
borderColor: helpers.castOption(hoverLabel.bordercolor, pt.pts),
fontFamily: helpers.castOption(hoverFont.family, pt.pts),
fontSize: helpers.castOption(hoverFont.size, pt.pts),
fontColor: helpers.castOption(hoverFont.color, pt.pts),
nameLength: helpers.castOption(hoverLabel.namelength, pt.pts),
textAlign: helpers.castOption(hoverLabel.align, pt.pts),
hovertemplate: helpers.castOption(trace2.hovertemplate, pt.pts),
hovertemplateLabels: pt,
eventData: [eventData(pt, trace2)]
}, {
container: fullLayout2._hoverlayer.node(),
outerContainer: fullLayout2._paper.node(),
gd: gd,
inOut_bbox: bbox
});
pt.bbox = bbox[0];
trace._hasHoverLabel = true;
}
trace._hasHoverEvent = true;
gd.emit('plotly_hover', {
points: [eventData(pt, trace2)],
event: d3.event
});
});
sliceTop.on('mouseout', function(evt) {
var fullLayout2 = gd._fullLayout;
var trace2 = gd._fullData[trace.index];
var pt = d3.select(this).datum();
if(trace._hasHoverEvent) {
evt.originalEvent = d3.event;
gd.emit('plotly_unhover', {
points: [eventData(pt, trace2)],
event: d3.event
});
trace._hasHoverEvent = false;
}
if(trace._hasHoverLabel) {
Fx.loneUnhover(fullLayout2._hoverlayer.node());
trace._hasHoverLabel = false;
}
});
sliceTop.on('click', function(pt) {
// TODO: this does not support right-click. If we want to support it, we
// would likely need to change pie to use dragElement instead of straight
// mapbox event binding. Or perhaps better, make a simple wrapper with the
// right mousedown, mousemove, and mouseup handlers just for a left/right click
// mapbox would use this too.
var fullLayout2 = gd._fullLayout;
var trace2 = gd._fullData[trace.index];
if(gd._dragging || fullLayout2.hovermode === false) return;
gd._hoverdata = [eventData(pt, trace2)];
Fx.click(gd, d3.event);
});
}
function determineOutsideTextFont(trace, pt, layoutFont) {
var color =
helpers.castOption(trace.outsidetextfont.color, pt.pts) ||
helpers.castOption(trace.textfont.color, pt.pts) ||
layoutFont.color;
var family =
helpers.castOption(trace.outsidetextfont.family, pt.pts) ||
helpers.castOption(trace.textfont.family, pt.pts) ||
layoutFont.family;
var size =
helpers.castOption(trace.outsidetextfont.size, pt.pts) ||
helpers.castOption(trace.textfont.size, pt.pts) ||
layoutFont.size;
return {
color: color,
family: family,
size: size
};
}
function determineInsideTextFont(trace, pt, layoutFont) {
var customColor = helpers.castOption(trace.insidetextfont.color, pt.pts);
if(!customColor && trace._input.textfont) {
// Why not simply using trace.textfont? Because if not set, it
// defaults to layout.font which has a default color. But if
// textfont.color and insidetextfont.color don't supply a value,
// a contrasting color shall be used.
customColor = helpers.castOption(trace._input.textfont.color, pt.pts);
}
var family =
helpers.castOption(trace.insidetextfont.family, pt.pts) ||
helpers.castOption(trace.textfont.family, pt.pts) ||
layoutFont.family;
var size =
helpers.castOption(trace.insidetextfont.size, pt.pts) ||
helpers.castOption(trace.textfont.size, pt.pts) ||
layoutFont.size;
return {
color: customColor || Color.contrast(pt.color),
family: family,
size: size
};
}
function prerenderTitles(cdModule, gd) {
var cd0, trace;
// Determine the width and height of the title for each pie.
for(var i = 0; i < cdModule.length; i++) {
cd0 = cdModule[i][0];
trace = cd0.trace;
if(trace.title.text) {
var txt = trace.title.text;
if(trace._meta) {
txt = Lib.templateString(txt, trace._meta);
}
var dummyTitle = Drawing.tester.append('text')
.attr('data-notex', 1)
.text(txt)
.call(Drawing.font, trace.title.font)
.call(svgTextUtils.convertToTspans, gd);
var bBox = Drawing.bBox(dummyTitle.node(), true);
cd0.titleBox = {
width: bBox.width,
height: bBox.height,
};
dummyTitle.remove();
}
}
}
function transformInsideText(textBB, pt, cd0) {
var r = cd0.r || pt.rpx1;
var rInscribed = pt.rInscribed;
var isEmpty = pt.startangle === pt.stopangle;
if(isEmpty) {
return {
rCenter: 1 - rInscribed,
scale: 0,
rotate: 0,
textPosAngle: 0
};
}
var ring = pt.ring;
var isCircle = (ring === 1) && (Math.abs(pt.startangle - pt.stopangle) === Math.PI * 2);
var halfAngle = pt.halfangle;
var midAngle = pt.midangle;
var orientation = cd0.trace.insidetextorientation;
var isHorizontal = orientation === 'horizontal';
var isTangential = orientation === 'tangential';
var isRadial = orientation === 'radial';
var isAuto = orientation === 'auto';
var allTransforms = [];
var newT;
if(!isAuto) {
// max size if text is placed (horizontally) at the top or bottom of the arc
var considerCrossing = function(angle, key) {
if(isCrossing(pt, angle)) {
var dStart = Math.abs(angle - pt.startangle);
var dStop = Math.abs(angle - pt.stopangle);
var closestEdge = dStart < dStop ? dStart : dStop;
if(key === 'tan') {
newT = calcTanTransform(textBB, r, ring, closestEdge, 0);
} else { // case of 'rad'
newT = calcRadTransform(textBB, r, ring, closestEdge, Math.PI / 2);
}
newT.textPosAngle = angle;
allTransforms.push(newT);
}
};
// to cover all cases with trace.rotation added
var i;
if(isHorizontal || isTangential) {
// top
for(i = 4; i >= -4; i -= 2) considerCrossing(Math.PI * i, 'tan');
// bottom
for(i = 4; i >= -4; i -= 2) considerCrossing(Math.PI * (i + 1), 'tan');
}
if(isHorizontal || isRadial) {
// left
for(i = 4; i >= -4; i -= 2) considerCrossing(Math.PI * (i + 1.5), 'rad');
// right
for(i = 4; i >= -4; i -= 2) considerCrossing(Math.PI * (i + 0.5), 'rad');
}
}
if(isCircle || isAuto || isHorizontal) {
// max size text can be inserted inside without rotating it
// this inscribes the text rectangle in a circle, which is then inscribed
// in the slice, so it will be an underestimate, which some day we may want
// to improve so this case can get more use
var textDiameter = Math.sqrt(textBB.width * textBB.width + textBB.height * textBB.height);
newT = {
scale: rInscribed * r * 2 / textDiameter,
// and the center position and rotation in this case
rCenter: 1 - rInscribed,
rotate: 0
};
newT.textPosAngle = (pt.startangle + pt.stopangle) / 2;
if(newT.scale >= 1) return newT;
allTransforms.push(newT);
}
if(isAuto || isRadial) {
newT = calcRadTransform(textBB, r, ring, halfAngle, midAngle);
newT.textPosAngle = (pt.startangle + pt.stopangle) / 2;
allTransforms.push(newT);
}
if(isAuto || isTangential) {
newT = calcTanTransform(textBB, r, ring, halfAngle, midAngle);
newT.textPosAngle = (pt.startangle + pt.stopangle) / 2;
allTransforms.push(newT);
}
var id = 0;
var maxScale = 0;
for(var k = 0; k < allTransforms.length; k++) {
var s = allTransforms[k].scale;
if(maxScale < s) {
maxScale = s;
id = k;
}
if(!isAuto && maxScale >= 1) {
// respect test order for non-auto options
break;
}
}
return allTransforms[id];
}
function isCrossing(pt, angle) {
var start = pt.startangle;
var stop = pt.stopangle;
return (
(start > angle && angle > stop) ||
(start < angle && angle < stop)
);
}
function calcRadTransform(textBB, r, ring, halfAngle, midAngle) {
r = Math.max(0, r - 2 * TEXTPAD);
// max size if text is rotated radially
var a = textBB.width / textBB.height;
var s = calcMaxHalfSize(a, halfAngle, r, ring);
return {
scale: s * 2 / textBB.height,
rCenter: calcRCenter(a, s / r),
rotate: calcRotate(midAngle)
};
}
function calcTanTransform(textBB, r, ring, halfAngle, midAngle) {
r = Math.max(0, r - 2 * TEXTPAD);
// max size if text is rotated tangentially
var a = textBB.height / textBB.width;
var s = calcMaxHalfSize(a, halfAngle, r, ring);
return {
scale: s * 2 / textBB.width,
rCenter: calcRCenter(a, s / r),
rotate: calcRotate(midAngle + Math.PI / 2)
};
}
function calcRCenter(a, b) {
return Math.cos(b) - a * b;
}
function calcRotate(t) {
return (180 / Math.PI * t + 720) % 180 - 90;
}
function calcMaxHalfSize(a, halfAngle, r, ring) {
var q = a + 1 / (2 * Math.tan(halfAngle));
return r * Math.min(
1 / (Math.sqrt(q * q + 0.5) + q),
ring / (Math.sqrt(a * a + ring / 2) + a)
);
}
function getInscribedRadiusFraction(pt, cd0) {
if(pt.v === cd0.vTotal && !cd0.trace.hole) return 1;// special case of 100% with no hole
return Math.min(1 / (1 + 1 / Math.sin(pt.halfangle)), pt.ring / 2);
}
function transformOutsideText(textBB, pt) {
var x = pt.pxmid[0];
var y = pt.pxmid[1];
var dx = textBB.width / 2;
var dy = textBB.height / 2;
if(x < 0) dx *= -1;
if(y < 0) dy *= -1;
return {
scale: 1,
rCenter: 1,
rotate: 0,
x: dx + Math.abs(dy) * (dx > 0 ? 1 : -1) / 2,
y: dy / (1 + x * x / (y * y)),
outside: true
};
}
function positionTitleInside(cd0) {
var textDiameter =
Math.sqrt(cd0.titleBox.width * cd0.titleBox.width + cd0.titleBox.height * cd0.titleBox.height);
return {
x: cd0.cx,
y: cd0.cy,
scale: cd0.trace.hole * cd0.r * 2 / textDiameter,
tx: 0,
ty: - cd0.titleBox.height / 2 + cd0.trace.title.font.size
};
}
function positionTitleOutside(cd0, plotSize) {
var scaleX = 1;
var scaleY = 1;
var maxPull;
var trace = cd0.trace;
// position of the baseline point of the text box in the plot, before scaling.
// we anchored the text in the middle, so the baseline is on the bottom middle
// of the first line of text.
var topMiddle = {
x: cd0.cx,
y: cd0.cy
};
// relative translation of the text box after scaling
var translate = {
tx: 0,
ty: 0
};
// we reason below as if the baseline is the top middle point of the text box.
// so we must add the font size to approximate the y-coord. of the top.
// note that this correction must happen after scaling.
translate.ty += trace.title.font.size;
maxPull = getMaxPull(trace);
if(trace.title.position.indexOf('top') !== -1) {
topMiddle.y -= (1 + maxPull) * cd0.r;
translate.ty -= cd0.titleBox.height;
} else if(trace.title.position.indexOf('bottom') !== -1) {
topMiddle.y += (1 + maxPull) * cd0.r;
}
var rx = applyAspectRatio(cd0.r, cd0.trace.aspectratio);
var maxWidth = plotSize.w * (trace.domain.x[1] - trace.domain.x[0]) / 2;
if(trace.title.position.indexOf('left') !== -1) {
// we start the text at the left edge of the pie
maxWidth = maxWidth + rx;
topMiddle.x -= (1 + maxPull) * rx;
translate.tx += cd0.titleBox.width / 2;
} else if(trace.title.position.indexOf('center') !== -1) {
maxWidth *= 2;
} else if(trace.title.position.indexOf('right') !== -1) {
maxWidth = maxWidth + rx;
topMiddle.x += (1 + maxPull) * rx;
translate.tx -= cd0.titleBox.width / 2;
}
scaleX = maxWidth / cd0.titleBox.width;
scaleY = getTitleSpace(cd0, plotSize) / cd0.titleBox.height;
return {
x: topMiddle.x,
y: topMiddle.y,
scale: Math.min(scaleX, scaleY),
tx: translate.tx,
ty: translate.ty
};
}
function applyAspectRatio(x, aspectratio) {
return x / ((aspectratio === undefined) ? 1 : aspectratio);
}
function getTitleSpace(cd0, plotSize) {
var trace = cd0.trace;
var pieBoxHeight = plotSize.h * (trace.domain.y[1] - trace.domain.y[0]);
// use at most half of the plot for the title
return Math.min(cd0.titleBox.height, pieBoxHeight / 2);
}
function getMaxPull(trace) {
var maxPull = trace.pull;
if(!maxPull) return 0;
var j;
if(Array.isArray(maxPull)) {
maxPull = 0;
for(j = 0; j < trace.pull.length; j++) {
if(trace.pull[j] > maxPull) maxPull = trace.pull[j];
}
}
return maxPull;
}
function scootLabels(quadrants, trace) {
var xHalf, yHalf, equatorFirst, farthestX, farthestY,
xDiffSign, yDiffSign, thisQuad, oppositeQuad,
wholeSide, i, thisQuadOutside, firstOppositeOutsidePt;
function topFirst(a, b) { return a.pxmid[1] - b.pxmid[1]; }
function bottomFirst(a, b) { return b.pxmid[1] - a.pxmid[1]; }
function scootOneLabel(thisPt, prevPt) {
if(!prevPt) prevPt = {};
var prevOuterY = prevPt.labelExtraY + (yHalf ? prevPt.yLabelMax : prevPt.yLabelMin);
var thisInnerY = yHalf ? thisPt.yLabelMin : thisPt.yLabelMax;
var thisOuterY = yHalf ? thisPt.yLabelMax : thisPt.yLabelMin;
var thisSliceOuterY = thisPt.cyFinal + farthestY(thisPt.px0[1], thisPt.px1[1]);
var newExtraY = prevOuterY - thisInnerY;
var xBuffer, i, otherPt, otherOuterY, otherOuterX, newExtraX;
// make sure this label doesn't overlap other labels
// this *only* has us move these labels vertically
if(newExtraY * yDiffSign > 0) thisPt.labelExtraY = newExtraY;
// make sure this label doesn't overlap any slices
if(!Array.isArray(trace.pull)) return; // this can only happen with array pulls
for(i = 0; i < wholeSide.length; i++) {
otherPt = wholeSide[i];
// overlap can only happen if the other point is pulled more than this one
if(otherPt === thisPt || (
(helpers.castOption(trace.pull, thisPt.pts) || 0) >=
(helpers.castOption(trace.pull, otherPt.pts) || 0))
) {
continue;
}
if((thisPt.pxmid[1] - otherPt.pxmid[1]) * yDiffSign > 0) {
// closer to the equator - by construction all of these happen first
// move the text vertically to get away from these slices
otherOuterY = otherPt.cyFinal + farthestY(otherPt.px0[1], otherPt.px1[1]);
newExtraY = otherOuterY - thisInnerY - thisPt.labelExtraY;
if(newExtraY * yDiffSign > 0) thisPt.labelExtraY += newExtraY;
} else if((thisOuterY + thisPt.labelExtraY - thisSliceOuterY) * yDiffSign > 0) {
// farther from the equator - happens after we've done all the
// vertical moving we're going to do
// move horizontally to get away from these more polar slices
// if we're moving horz. based on a slice that's several slices away from this one
// then we need some extra space for the lines to labels between them
xBuffer = 3 * xDiffSign * Math.abs(i - wholeSide.indexOf(thisPt));
otherOuterX = otherPt.cxFinal + farthestX(otherPt.px0[0], otherPt.px1[0]);
newExtraX = otherOuterX + xBuffer - (thisPt.cxFinal + thisPt.pxmid[0]) - thisPt.labelExtraX;
if(newExtraX * xDiffSign > 0) thisPt.labelExtraX += newExtraX;
}
}
}
for(yHalf = 0; yHalf < 2; yHalf++) {
equatorFirst = yHalf ? topFirst : bottomFirst;
farthestY = yHalf ? Math.max : Math.min;
yDiffSign = yHalf ? 1 : -1;
for(xHalf = 0; xHalf < 2; xHalf++) {
farthestX = xHalf ? Math.max : Math.min;
xDiffSign = xHalf ? 1 : -1;
// first sort the array
// note this is a copy of cd, so cd itself doesn't get sorted
// but we can still modify points in place.
thisQuad = quadrants[yHalf][xHalf];
thisQuad.sort(equatorFirst);
oppositeQuad = quadrants[1 - yHalf][xHalf];
wholeSide = oppositeQuad.concat(thisQuad);
thisQuadOutside = [];
for(i = 0; i < thisQuad.length; i++) {
if(thisQuad[i].yLabelMid !== undefined) thisQuadOutside.push(thisQuad[i]);
}
firstOppositeOutsidePt = false;
for(i = 0; yHalf && i < oppositeQuad.length; i++) {
if(oppositeQuad[i].yLabelMid !== undefined) {
firstOppositeOutsidePt = oppositeQuad[i];
break;
}
}
// each needs to avoid the previous
for(i = 0; i < thisQuadOutside.length; i++) {
var prevPt = i && thisQuadOutside[i - 1];
// bottom half needs to avoid the first label of the top half
// top half we still need to call scootOneLabel on the first slice
// so we can avoid other slices, but we don't pass a prevPt
if(firstOppositeOutsidePt && !i) prevPt = firstOppositeOutsidePt;
scootOneLabel(thisQuadOutside[i], prevPt);
}
}
}
}
function layoutAreas(cdModule, plotSize) {
var scaleGroups = [];
// figure out the center and maximum radius
for(var i = 0; i < cdModule.length; i++) {
var cd0 = cdModule[i][0];
var trace = cd0.trace;
var domain = trace.domain;
var width = plotSize.w * (domain.x[1] - domain.x[0]);
var height = plotSize.h * (domain.y[1] - domain.y[0]);
// leave some space for the title, if it will be displayed outside
if(trace.title.text && trace.title.position !== 'middle center') {
height -= getTitleSpace(cd0, plotSize);
}
var rx = width / 2;
var ry = height / 2;
if(trace.type === 'funnelarea' && !trace.scalegroup) {
ry /= trace.aspectratio;
}
cd0.r = Math.min(rx, ry) / (1 + getMaxPull(trace));
cd0.cx = plotSize.l + plotSize.w * (trace.domain.x[1] + trace.domain.x[0]) / 2;
cd0.cy = plotSize.t + plotSize.h * (1 - trace.domain.y[0]) - height / 2;
if(trace.title.text && trace.title.position.indexOf('bottom') !== -1) {
cd0.cy -= getTitleSpace(cd0, plotSize);
}
if(trace.scalegroup && scaleGroups.indexOf(trace.scalegroup) === -1) {
scaleGroups.push(trace.scalegroup);
}
}
groupScale(cdModule, scaleGroups);
}
function groupScale(cdModule, scaleGroups) {
var cd0, i, trace;
// scale those that are grouped
for(var k = 0; k < scaleGroups.length; k++) {