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comparison geotemco/lib/flot/jquery.flot.pie.js @ 0:b12c99b7c3f0

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author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Mon, 19 Jan 2015 17:13:49 +0100
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1 /* Flot plugin for rendering pie charts.
2
3 Copyright (c) 2007-2013 IOLA and Ole Laursen.
4 Licensed under the MIT license.
5
6 The plugin assumes that each series has a single data value, and that each
7 value is a positive integer or zero. Negative numbers don't make sense for a
8 pie chart, and have unpredictable results. The values do NOT need to be
9 passed in as percentages; the plugin will calculate the total and per-slice
10 percentages internally.
11
12 * Created by Brian Medendorp
13
14 * Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars
15
16 The plugin supports these options:
17
18 series: {
19 pie: {
20 show: true/false
21 radius: 0-1 for percentage of fullsize, or a specified pixel length, or 'auto'
22 innerRadius: 0-1 for percentage of fullsize or a specified pixel length, for creating a donut effect
23 startAngle: 0-2 factor of PI used for starting angle (in radians) i.e 3/2 starts at the top, 0 and 2 have the same result
24 tilt: 0-1 for percentage to tilt the pie, where 1 is no tilt, and 0 is completely flat (nothing will show)
25 offset: {
26 top: integer value to move the pie up or down
27 left: integer value to move the pie left or right, or 'auto'
28 },
29 stroke: {
30 color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#FFF')
31 width: integer pixel width of the stroke
32 },
33 label: {
34 show: true/false, or 'auto'
35 formatter: a user-defined function that modifies the text/style of the label text
36 radius: 0-1 for percentage of fullsize, or a specified pixel length
37 background: {
38 color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#000')
39 opacity: 0-1
40 },
41 threshold: 0-1 for the percentage value at which to hide labels (if they're too small)
42 },
43 combine: {
44 threshold: 0-1 for the percentage value at which to combine slices (if they're too small)
45 color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#CCC'), if null, the plugin will automatically use the color of the first slice to be combined
46 label: any text value of what the combined slice should be labeled
47 }
48 highlight: {
49 opacity: 0-1
50 }
51 }
52 }
53
54 More detail and specific examples can be found in the included HTML file.
55
56 */
57
58 (function($) {
59
60 // Maximum redraw attempts when fitting labels within the plot
61
62 var REDRAW_ATTEMPTS = 10;
63
64 // Factor by which to shrink the pie when fitting labels within the plot
65
66 var REDRAW_SHRINK = 0.95;
67
68 function init(plot) {
69
70 var canvas = null,
71 target = null,
72 options = null,
73 maxRadius = null,
74 centerLeft = null,
75 centerTop = null,
76 processed = false,
77 ctx = null;
78
79 // interactive variables
80
81 var highlights = [];
82
83 // add hook to determine if pie plugin in enabled, and then perform necessary operations
84
85 plot.hooks.processOptions.push(function(plot, options) {
86 if (options.series.pie.show) {
87
88 options.grid.show = false;
89
90 // set labels.show
91
92 if (options.series.pie.label.show == "auto") {
93 if (options.legend.show) {
94 options.series.pie.label.show = false;
95 } else {
96 options.series.pie.label.show = true;
97 }
98 }
99
100 // set radius
101
102 if (options.series.pie.radius == "auto") {
103 if (options.series.pie.label.show) {
104 options.series.pie.radius = 3/4;
105 } else {
106 options.series.pie.radius = 1;
107 }
108 }
109
110 // ensure sane tilt
111
112 if (options.series.pie.tilt > 1) {
113 options.series.pie.tilt = 1;
114 } else if (options.series.pie.tilt < 0) {
115 options.series.pie.tilt = 0;
116 }
117 }
118 });
119
120 plot.hooks.bindEvents.push(function(plot, eventHolder) {
121 var options = plot.getOptions();
122 if (options.series.pie.show) {
123 if (options.grid.hoverable) {
124 eventHolder.unbind("mousemove").mousemove(onMouseMove);
125 }
126 if (options.grid.clickable) {
127 eventHolder.unbind("click").click(onClick);
128 }
129 }
130 });
131
132 plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
133 var options = plot.getOptions();
134 if (options.series.pie.show) {
135 processDatapoints(plot, series, data, datapoints);
136 }
137 });
138
139 plot.hooks.drawOverlay.push(function(plot, octx) {
140 var options = plot.getOptions();
141 if (options.series.pie.show) {
142 drawOverlay(plot, octx);
143 }
144 });
145
146 plot.hooks.draw.push(function(plot, newCtx) {
147 var options = plot.getOptions();
148 if (options.series.pie.show) {
149 draw(plot, newCtx);
150 }
151 });
152
153 function processDatapoints(plot, series, datapoints) {
154 if (!processed) {
155 processed = true;
156 canvas = plot.getCanvas();
157 target = $(canvas).parent();
158 options = plot.getOptions();
159 plot.setData(combine(plot.getData()));
160 }
161 }
162
163 function combine(data) {
164
165 var total = 0,
166 combined = 0,
167 numCombined = 0,
168 color = options.series.pie.combine.color,
169 newdata = [];
170
171 // Fix up the raw data from Flot, ensuring the data is numeric
172
173 for (var i = 0; i < data.length; ++i) {
174
175 var value = data[i].data;
176
177 // If the data is an array, we'll assume that it's a standard
178 // Flot x-y pair, and are concerned only with the second value.
179
180 // Note how we use the original array, rather than creating a
181 // new one; this is more efficient and preserves any extra data
182 // that the user may have stored in higher indexes.
183
184 if ($.isArray(value) && value.length == 1) {
185 value = value[0];
186 }
187
188 if ($.isArray(value)) {
189 // Equivalent to $.isNumeric() but compatible with jQuery < 1.7
190 if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
191 value[1] = +value[1];
192 } else {
193 value[1] = 0;
194 }
195 } else if (!isNaN(parseFloat(value)) && isFinite(value)) {
196 value = [1, +value];
197 } else {
198 value = [1, 0];
199 }
200
201 data[i].data = [value];
202 }
203
204 // Sum up all the slices, so we can calculate percentages for each
205
206 for (var i = 0; i < data.length; ++i) {
207 total += data[i].data[0][1];
208 }
209
210 // Count the number of slices with percentages below the combine
211 // threshold; if it turns out to be just one, we won't combine.
212
213 for (var i = 0; i < data.length; ++i) {
214 var value = data[i].data[0][1];
215 if (value / total <= options.series.pie.combine.threshold) {
216 combined += value;
217 numCombined++;
218 if (!color) {
219 color = data[i].color;
220 }
221 }
222 }
223
224 for (var i = 0; i < data.length; ++i) {
225 var value = data[i].data[0][1];
226 if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
227 newdata.push(
228 $.extend(data[i], { /* extend to allow keeping all other original data values
229 and using them e.g. in labelFormatter. */
230 data: [[1, value]],
231 color: data[i].color,
232 label: data[i].label,
233 angle: value * Math.PI * 2 / total,
234 percent: value / (total / 100)
235 })
236 );
237 }
238 }
239
240 if (numCombined > 1) {
241 newdata.push({
242 data: [[1, combined]],
243 color: color,
244 label: options.series.pie.combine.label,
245 angle: combined * Math.PI * 2 / total,
246 percent: combined / (total / 100)
247 });
248 }
249
250 return newdata;
251 }
252
253 function draw(plot, newCtx) {
254
255 if (!target) {
256 return; // if no series were passed
257 }
258
259 var canvasWidth = plot.getPlaceholder().width(),
260 canvasHeight = plot.getPlaceholder().height(),
261 legendWidth = target.children().filter(".legend").children().width() || 0;
262
263 ctx = newCtx;
264
265 // WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
266
267 // When combining smaller slices into an 'other' slice, we need to
268 // add a new series. Since Flot gives plugins no way to modify the
269 // list of series, the pie plugin uses a hack where the first call
270 // to processDatapoints results in a call to setData with the new
271 // list of series, then subsequent processDatapoints do nothing.
272
273 // The plugin-global 'processed' flag is used to control this hack;
274 // it starts out false, and is set to true after the first call to
275 // processDatapoints.
276
277 // Unfortunately this turns future setData calls into no-ops; they
278 // call processDatapoints, the flag is true, and nothing happens.
279
280 // To fix this we'll set the flag back to false here in draw, when
281 // all series have been processed, so the next sequence of calls to
282 // processDatapoints once again starts out with a slice-combine.
283 // This is really a hack; in 0.9 we need to give plugins a proper
284 // way to modify series before any processing begins.
285
286 processed = false;
287
288 // calculate maximum radius and center point
289
290 maxRadius = Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
291 centerTop = canvasHeight / 2 + options.series.pie.offset.top;
292 centerLeft = canvasWidth / 2;
293
294 if (options.series.pie.offset.left == "auto") {
295 if (options.legend.position.match("w")) {
296 centerLeft += legendWidth / 2;
297 } else {
298 centerLeft -= legendWidth / 2;
299 }
300 if (centerLeft < maxRadius) {
301 centerLeft = maxRadius;
302 } else if (centerLeft > canvasWidth - maxRadius) {
303 centerLeft = canvasWidth - maxRadius;
304 }
305 } else {
306 centerLeft += options.series.pie.offset.left;
307 }
308
309 var slices = plot.getData(),
310 attempts = 0;
311
312 // Keep shrinking the pie's radius until drawPie returns true,
313 // indicating that all the labels fit, or we try too many times.
314
315 do {
316 if (attempts > 0) {
317 maxRadius *= REDRAW_SHRINK;
318 }
319 attempts += 1;
320 clear();
321 if (options.series.pie.tilt <= 0.8) {
322 drawShadow();
323 }
324 } while (!drawPie() && attempts < REDRAW_ATTEMPTS)
325
326 if (attempts >= REDRAW_ATTEMPTS) {
327 clear();
328 target.prepend("<div class='error'>Could not draw pie with labels contained inside canvas</div>");
329 }
330
331 if (plot.setSeries && plot.insertLegend) {
332 plot.setSeries(slices);
333 plot.insertLegend();
334 }
335
336 // we're actually done at this point, just defining internal functions at this point
337
338 function clear() {
339 ctx.clearRect(0, 0, canvasWidth, canvasHeight);
340 target.children().filter(".pieLabel, .pieLabelBackground").remove();
341 }
342
343 function drawShadow() {
344
345 var shadowLeft = options.series.pie.shadow.left;
346 var shadowTop = options.series.pie.shadow.top;
347 var edge = 10;
348 var alpha = options.series.pie.shadow.alpha;
349 var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
350
351 if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) {
352 return; // shadow would be outside canvas, so don't draw it
353 }
354
355 ctx.save();
356 ctx.translate(shadowLeft,shadowTop);
357 ctx.globalAlpha = alpha;
358 ctx.fillStyle = "#000";
359
360 // center and rotate to starting position
361
362 ctx.translate(centerLeft,centerTop);
363 ctx.scale(1, options.series.pie.tilt);
364
365 //radius -= edge;
366
367 for (var i = 1; i <= edge; i++) {
368 ctx.beginPath();
369 ctx.arc(0, 0, radius, 0, Math.PI * 2, false);
370 ctx.fill();
371 radius -= i;
372 }
373
374 ctx.restore();
375 }
376
377 function drawPie() {
378
379 var startAngle = Math.PI * options.series.pie.startAngle;
380 var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
381
382 // center and rotate to starting position
383
384 ctx.save();
385 ctx.translate(centerLeft,centerTop);
386 ctx.scale(1, options.series.pie.tilt);
387 //ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera
388
389 // draw slices
390
391 ctx.save();
392 var currentAngle = startAngle;
393 for (var i = 0; i < slices.length; ++i) {
394 slices[i].startAngle = currentAngle;
395 drawSlice(slices[i].angle, slices[i].color, true);
396 }
397 ctx.restore();
398
399 // draw slice outlines
400
401 if (options.series.pie.stroke.width > 0) {
402 ctx.save();
403 ctx.lineWidth = options.series.pie.stroke.width;
404 currentAngle = startAngle;
405 for (var i = 0; i < slices.length; ++i) {
406 drawSlice(slices[i].angle, options.series.pie.stroke.color, false);
407 }
408 ctx.restore();
409 }
410
411 // draw donut hole
412
413 drawDonutHole(ctx);
414
415 ctx.restore();
416
417 // Draw the labels, returning true if they fit within the plot
418
419 if (options.series.pie.label.show) {
420 return drawLabels();
421 } else return true;
422
423 function drawSlice(angle, color, fill) {
424
425 if (angle <= 0 || isNaN(angle)) {
426 return;
427 }
428
429 if (fill) {
430 ctx.fillStyle = color;
431 } else {
432 ctx.strokeStyle = color;
433 ctx.lineJoin = "round";
434 }
435
436 ctx.beginPath();
437 if (Math.abs(angle - Math.PI * 2) > 0.000000001) {
438 ctx.moveTo(0, 0); // Center of the pie
439 }
440
441 //ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
442 ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false);
443 ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false);
444 ctx.closePath();
445 //ctx.rotate(angle); // This doesn't work properly in Opera
446 currentAngle += angle;
447
448 if (fill) {
449 ctx.fill();
450 } else {
451 ctx.stroke();
452 }
453 }
454
455 function drawLabels() {
456
457 var currentAngle = startAngle;
458 var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius;
459
460 for (var i = 0; i < slices.length; ++i) {
461 if (slices[i].percent >= options.series.pie.label.threshold * 100) {
462 if (!drawLabel(slices[i], currentAngle, i)) {
463 return false;
464 }
465 }
466 currentAngle += slices[i].angle;
467 }
468
469 return true;
470
471 function drawLabel(slice, startAngle, index) {
472
473 if (slice.data[0][1] == 0) {
474 return true;
475 }
476
477 // format label text
478
479 var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;
480
481 if (lf) {
482 text = lf(slice.label, slice);
483 } else {
484 text = slice.label;
485 }
486
487 if (plf) {
488 text = plf(text, slice);
489 }
490
491 var halfAngle = ((startAngle + slice.angle) + startAngle) / 2;
492 var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
493 var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;
494
495 var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>";
496 target.append(html);
497
498 var label = target.children("#pieLabel" + index);
499 var labelTop = (y - label.height() / 2);
500 var labelLeft = (x - label.width() / 2);
501
502 label.css("top", labelTop);
503 label.css("left", labelLeft);
504
505 // check to make sure that the label is not outside the canvas
506
507 if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) {
508 return false;
509 }
510
511 if (options.series.pie.label.background.opacity != 0) {
512
513 // put in the transparent background separately to avoid blended labels and label boxes
514
515 var c = options.series.pie.label.background.color;
516
517 if (c == null) {
518 c = slice.color;
519 }
520
521 var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;";
522 $("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>")
523 .css("opacity", options.series.pie.label.background.opacity)
524 .insertBefore(label);
525 }
526
527 return true;
528 } // end individual label function
529 } // end drawLabels function
530 } // end drawPie function
531 } // end draw function
532
533 // Placed here because it needs to be accessed from multiple locations
534
535 function drawDonutHole(layer) {
536 if (options.series.pie.innerRadius > 0) {
537
538 // subtract the center
539
540 layer.save();
541 var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius;
542 layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color
543 layer.beginPath();
544 layer.fillStyle = options.series.pie.stroke.color;
545 layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
546 layer.fill();
547 layer.closePath();
548 layer.restore();
549
550 // add inner stroke
551
552 layer.save();
553 layer.beginPath();
554 layer.strokeStyle = options.series.pie.stroke.color;
555 layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
556 layer.stroke();
557 layer.closePath();
558 layer.restore();
559
560 // TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
561 }
562 }
563
564 //-- Additional Interactive related functions --
565
566 function isPointInPoly(poly, pt) {
567 for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
568 ((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1]))
569 && (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0])
570 && (c = !c);
571 return c;
572 }
573
574 function findNearbySlice(mouseX, mouseY) {
575
576 var slices = plot.getData(),
577 options = plot.getOptions(),
578 radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
579 x, y;
580
581 for (var i = 0; i < slices.length; ++i) {
582
583 var s = slices[i];
584
585 if (s.pie.show) {
586
587 ctx.save();
588 ctx.beginPath();
589 ctx.moveTo(0, 0); // Center of the pie
590 //ctx.scale(1, options.series.pie.tilt); // this actually seems to break everything when here.
591 ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false);
592 ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false);
593 ctx.closePath();
594 x = mouseX - centerLeft;
595 y = mouseY - centerTop;
596
597 if (ctx.isPointInPath) {
598 if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
599 ctx.restore();
600 return {
601 datapoint: [s.percent, s.data],
602 dataIndex: 0,
603 series: s,
604 seriesIndex: i
605 };
606 }
607 } else {
608
609 // excanvas for IE doesn;t support isPointInPath, this is a workaround.
610
611 var p1X = radius * Math.cos(s.startAngle),
612 p1Y = radius * Math.sin(s.startAngle),
613 p2X = radius * Math.cos(s.startAngle + s.angle / 4),
614 p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
615 p3X = radius * Math.cos(s.startAngle + s.angle / 2),
616 p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
617 p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
618 p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
619 p5X = radius * Math.cos(s.startAngle + s.angle),
620 p5Y = radius * Math.sin(s.startAngle + s.angle),
621 arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]],
622 arrPoint = [x, y];
623
624 // TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?
625
626 if (isPointInPoly(arrPoly, arrPoint)) {
627 ctx.restore();
628 return {
629 datapoint: [s.percent, s.data],
630 dataIndex: 0,
631 series: s,
632 seriesIndex: i
633 };
634 }
635 }
636
637 ctx.restore();
638 }
639 }
640
641 return null;
642 }
643
644 function onMouseMove(e) {
645 triggerClickHoverEvent("plothover", e);
646 }
647
648 function onClick(e) {
649 triggerClickHoverEvent("plotclick", e);
650 }
651
652 // trigger click or hover event (they send the same parameters so we share their code)
653
654 function triggerClickHoverEvent(eventname, e) {
655
656 var offset = plot.offset();
657 var canvasX = parseInt(e.pageX - offset.left);
658 var canvasY = parseInt(e.pageY - offset.top);
659 var item = findNearbySlice(canvasX, canvasY);
660
661 if (options.grid.autoHighlight) {
662
663 // clear auto-highlights
664
665 for (var i = 0; i < highlights.length; ++i) {
666 var h = highlights[i];
667 if (h.auto == eventname && !(item && h.series == item.series)) {
668 unhighlight(h.series);
669 }
670 }
671 }
672
673 // highlight the slice
674
675 if (item) {
676 highlight(item.series, eventname);
677 }
678
679 // trigger any hover bind events
680
681 var pos = { pageX: e.pageX, pageY: e.pageY };
682 target.trigger(eventname, [pos, item]);
683 }
684
685 function highlight(s, auto) {
686 //if (typeof s == "number") {
687 // s = series[s];
688 //}
689
690 var i = indexOfHighlight(s);
691
692 if (i == -1) {
693 highlights.push({ series: s, auto: auto });
694 plot.triggerRedrawOverlay();
695 } else if (!auto) {
696 highlights[i].auto = false;
697 }
698 }
699
700 function unhighlight(s) {
701 if (s == null) {
702 highlights = [];
703 plot.triggerRedrawOverlay();
704 }
705
706 //if (typeof s == "number") {
707 // s = series[s];
708 //}
709
710 var i = indexOfHighlight(s);
711
712 if (i != -1) {
713 highlights.splice(i, 1);
714 plot.triggerRedrawOverlay();
715 }
716 }
717
718 function indexOfHighlight(s) {
719 for (var i = 0; i < highlights.length; ++i) {
720 var h = highlights[i];
721 if (h.series == s)
722 return i;
723 }
724 return -1;
725 }
726
727 function drawOverlay(plot, octx) {
728
729 var options = plot.getOptions();
730
731 var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
732
733 octx.save();
734 octx.translate(centerLeft, centerTop);
735 octx.scale(1, options.series.pie.tilt);
736
737 for (var i = 0; i < highlights.length; ++i) {
738 drawHighlight(highlights[i].series);
739 }
740
741 drawDonutHole(octx);
742
743 octx.restore();
744
745 function drawHighlight(series) {
746
747 if (series.angle <= 0 || isNaN(series.angle)) {
748 return;
749 }
750
751 //octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
752 octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor
753 octx.beginPath();
754 if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) {
755 octx.moveTo(0, 0); // Center of the pie
756 }
757 octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false);
758 octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false);
759 octx.closePath();
760 octx.fill();
761 }
762 }
763 } // end init (plugin body)
764
765 // define pie specific options and their default values
766
767 var options = {
768 series: {
769 pie: {
770 show: false,
771 radius: "auto", // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value)
772 innerRadius: 0, /* for donut */
773 startAngle: 3/2,
774 tilt: 1,
775 shadow: {
776 left: 5, // shadow left offset
777 top: 15, // shadow top offset
778 alpha: 0.02 // shadow alpha
779 },
780 offset: {
781 top: 0,
782 left: "auto"
783 },
784 stroke: {
785 color: "#fff",
786 width: 1
787 },
788 label: {
789 show: "auto",
790 formatter: function(label, slice) {
791 return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>";
792 }, // formatter function
793 radius: 1, // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value)
794 background: {
795 color: null,
796 opacity: 0
797 },
798 threshold: 0 // percentage at which to hide the label (i.e. the slice is too narrow)
799 },
800 combine: {
801 threshold: -1, // percentage at which to combine little slices into one larger slice
802 color: null, // color to give the new slice (auto-generated if null)
803 label: "Other" // label to give the new slice
804 },
805 highlight: {
806 //color: "#fff", // will add this functionality once parseColor is available
807 opacity: 0.5
808 }
809 }
810 }
811 };
812
813 $.plot.plugins.push({
814 init: init,
815 options: options,
816 name: "pie",
817 version: "1.1"
818 });
819
820 })(jQuery);