|
0
|
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);
|
