root / static / js / jquery.flot.pie.js @ 04733cdb
History | View | Annotate | Download (23.1 kB)
| 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 |
maxRadius = null,
|
| 73 |
centerLeft = null,
|
| 74 |
centerTop = null,
|
| 75 |
processed = false,
|
| 76 |
ctx = null;
|
| 77 |
|
| 78 |
// interactive variables
|
| 79 |
|
| 80 |
var highlights = [];
|
| 81 |
|
| 82 |
// add hook to determine if pie plugin in enabled, and then perform necessary operations
|
| 83 |
|
| 84 |
plot.hooks.processOptions.push(function(plot, options) {
|
| 85 |
if (options.series.pie.show) {
|
| 86 |
|
| 87 |
options.grid.show = false;
|
| 88 |
|
| 89 |
// set labels.show
|
| 90 |
|
| 91 |
if (options.series.pie.label.show == "auto") { |
| 92 |
if (options.legend.show) {
|
| 93 |
options.series.pie.label.show = false;
|
| 94 |
} else {
|
| 95 |
options.series.pie.label.show = true;
|
| 96 |
} |
| 97 |
} |
| 98 |
|
| 99 |
// set radius
|
| 100 |
|
| 101 |
if (options.series.pie.radius == "auto") { |
| 102 |
if (options.series.pie.label.show) {
|
| 103 |
options.series.pie.radius = 3/4; |
| 104 |
} else {
|
| 105 |
options.series.pie.radius = 1;
|
| 106 |
} |
| 107 |
} |
| 108 |
|
| 109 |
// ensure sane tilt
|
| 110 |
|
| 111 |
if (options.series.pie.tilt > 1) { |
| 112 |
options.series.pie.tilt = 1;
|
| 113 |
} else if (options.series.pie.tilt < 0) { |
| 114 |
options.series.pie.tilt = 0;
|
| 115 |
} |
| 116 |
} |
| 117 |
}); |
| 118 |
|
| 119 |
plot.hooks.bindEvents.push(function(plot, eventHolder) {
|
| 120 |
var options = plot.getOptions();
|
| 121 |
if (options.series.pie.show) {
|
| 122 |
if (options.grid.hoverable) {
|
| 123 |
eventHolder.unbind("mousemove").mousemove(onMouseMove);
|
| 124 |
} |
| 125 |
if (options.grid.clickable) {
|
| 126 |
eventHolder.unbind("click").click(onClick);
|
| 127 |
} |
| 128 |
} |
| 129 |
}); |
| 130 |
|
| 131 |
plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
|
| 132 |
var options = plot.getOptions();
|
| 133 |
if (options.series.pie.show) {
|
| 134 |
processDatapoints(plot, series, data, datapoints); |
| 135 |
} |
| 136 |
}); |
| 137 |
|
| 138 |
plot.hooks.drawOverlay.push(function(plot, octx) {
|
| 139 |
var options = plot.getOptions();
|
| 140 |
if (options.series.pie.show) {
|
| 141 |
drawOverlay(plot, octx); |
| 142 |
} |
| 143 |
}); |
| 144 |
|
| 145 |
plot.hooks.draw.push(function(plot, newCtx) {
|
| 146 |
var options = plot.getOptions();
|
| 147 |
if (options.series.pie.show) {
|
| 148 |
draw(plot, newCtx); |
| 149 |
} |
| 150 |
}); |
| 151 |
|
| 152 |
function processDatapoints(plot, series, datapoints) { |
| 153 |
if (!processed) {
|
| 154 |
processed = true;
|
| 155 |
canvas = plot.getCanvas(); |
| 156 |
target = $(canvas).parent();
|
| 157 |
options = plot.getOptions(); |
| 158 |
plot.setData(combine(plot.getData())); |
| 159 |
} |
| 160 |
} |
| 161 |
|
| 162 |
function combine(data) { |
| 163 |
|
| 164 |
var total = 0, |
| 165 |
combined = 0,
|
| 166 |
numCombined = 0,
|
| 167 |
color = options.series.pie.combine.color, |
| 168 |
newdata = []; |
| 169 |
|
| 170 |
// Fix up the raw data from Flot, ensuring the data is numeric
|
| 171 |
|
| 172 |
for (var i = 0; i < data.length; ++i) { |
| 173 |
|
| 174 |
var value = data[i].data;
|
| 175 |
|
| 176 |
// If the data is an array, we'll assume that it's a standard
|
| 177 |
// Flot x-y pair, and are concerned only with the second value.
|
| 178 |
|
| 179 |
// Note how we use the original array, rather than creating a
|
| 180 |
// new one; this is more efficient and preserves any extra data
|
| 181 |
// that the user may have stored in higher indexes.
|
| 182 |
|
| 183 |
if ($.isArray(value) && value.length == 1) { |
| 184 |
value = value[0];
|
| 185 |
} |
| 186 |
|
| 187 |
if ($.isArray(value)) { |
| 188 |
// Equivalent to $.isNumeric() but compatible with jQuery < 1.7
|
| 189 |
if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) { |
| 190 |
value[1] = +value[1]; |
| 191 |
} else {
|
| 192 |
value[1] = 0; |
| 193 |
} |
| 194 |
} else if (!isNaN(parseFloat(value)) && isFinite(value)) { |
| 195 |
value = [1, +value];
|
| 196 |
} else {
|
| 197 |
value = [1, 0]; |
| 198 |
} |
| 199 |
|
| 200 |
data[i].data = [value]; |
| 201 |
} |
| 202 |
|
| 203 |
// Sum up all the slices, so we can calculate percentages for each
|
| 204 |
|
| 205 |
for (var i = 0; i < data.length; ++i) { |
| 206 |
total += data[i].data[0][1]; |
| 207 |
} |
| 208 |
|
| 209 |
// Count the number of slices with percentages below the combine
|
| 210 |
// threshold; if it turns out to be just one, we won't combine.
|
| 211 |
|
| 212 |
for (var i = 0; i < data.length; ++i) { |
| 213 |
var value = data[i].data[0][1]; |
| 214 |
if (value / total <= options.series.pie.combine.threshold) {
|
| 215 |
combined += value; |
| 216 |
numCombined++; |
| 217 |
if (!color) {
|
| 218 |
color = data[i].color; |
| 219 |
} |
| 220 |
} |
| 221 |
} |
| 222 |
|
| 223 |
for (var i = 0; i < data.length; ++i) { |
| 224 |
var value = data[i].data[0][1]; |
| 225 |
if (numCombined < 2 || value / total > options.series.pie.combine.threshold) { |
| 226 |
newdata.push({
|
| 227 |
data: [[1, value]], |
| 228 |
color: data[i].color,
|
| 229 |
label: data[i].label,
|
| 230 |
angle: value * Math.PI * 2 / total, |
| 231 |
percent: value / (total / 100) |
| 232 |
}); |
| 233 |
} |
| 234 |
} |
| 235 |
|
| 236 |
if (numCombined > 1) { |
| 237 |
newdata.push({
|
| 238 |
data: [[1, combined]], |
| 239 |
color: color,
|
| 240 |
label: options.series.pie.combine.label,
|
| 241 |
angle: combined * Math.PI * 2 / total, |
| 242 |
percent: combined / (total / 100) |
| 243 |
}); |
| 244 |
} |
| 245 |
|
| 246 |
return newdata;
|
| 247 |
} |
| 248 |
|
| 249 |
function draw(plot, newCtx) { |
| 250 |
|
| 251 |
if (!target) {
|
| 252 |
return; // if no series were passed |
| 253 |
} |
| 254 |
|
| 255 |
var canvasWidth = plot.getPlaceholder().width(),
|
| 256 |
canvasHeight = plot.getPlaceholder().height(), |
| 257 |
legendWidth = target.children().filter(".legend").children().width() || 0; |
| 258 |
|
| 259 |
ctx = newCtx; |
| 260 |
|
| 261 |
// WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
|
| 262 |
|
| 263 |
// When combining smaller slices into an 'other' slice, we need to
|
| 264 |
// add a new series. Since Flot gives plugins no way to modify the
|
| 265 |
// list of series, the pie plugin uses a hack where the first call
|
| 266 |
// to processDatapoints results in a call to setData with the new
|
| 267 |
// list of series, then subsequent processDatapoints do nothing.
|
| 268 |
|
| 269 |
// The plugin-global 'processed' flag is used to control this hack;
|
| 270 |
// it starts out false, and is set to true after the first call to
|
| 271 |
// processDatapoints.
|
| 272 |
|
| 273 |
// Unfortunately this turns future setData calls into no-ops; they
|
| 274 |
// call processDatapoints, the flag is true, and nothing happens.
|
| 275 |
|
| 276 |
// To fix this we'll set the flag back to false here in draw, when
|
| 277 |
// all series have been processed, so the next sequence of calls to
|
| 278 |
// processDatapoints once again starts out with a slice-combine.
|
| 279 |
// This is really a hack; in 0.9 we need to give plugins a proper
|
| 280 |
// way to modify series before any processing begins.
|
| 281 |
|
| 282 |
processed = false;
|
| 283 |
|
| 284 |
// calculate maximum radius and center point
|
| 285 |
|
| 286 |
maxRadius = Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
|
| 287 |
centerTop = canvasHeight / 2 + options.series.pie.offset.top;
|
| 288 |
centerLeft = canvasWidth / 2;
|
| 289 |
|
| 290 |
if (options.series.pie.offset.left == "auto") { |
| 291 |
if (options.legend.position.match("w")) { |
| 292 |
centerLeft += legendWidth / 2;
|
| 293 |
} else {
|
| 294 |
centerLeft -= legendWidth / 2;
|
| 295 |
} |
| 296 |
} else {
|
| 297 |
centerLeft += options.series.pie.offset.left; |
| 298 |
} |
| 299 |
|
| 300 |
if (centerLeft < maxRadius) {
|
| 301 |
centerLeft = maxRadius; |
| 302 |
} else if (centerLeft > canvasWidth - maxRadius) { |
| 303 |
centerLeft = canvasWidth - maxRadius; |
| 304 |
} |
| 305 |
|
| 306 |
var slices = plot.getData(),
|
| 307 |
attempts = 0;
|
| 308 |
|
| 309 |
// Keep shrinking the pie's radius until drawPie returns true,
|
| 310 |
// indicating that all the labels fit, or we try too many times.
|
| 311 |
|
| 312 |
do {
|
| 313 |
if (attempts > 0) { |
| 314 |
maxRadius *= REDRAW_SHRINK; |
| 315 |
} |
| 316 |
attempts += 1;
|
| 317 |
clear(); |
| 318 |
if (options.series.pie.tilt <= 0.8) { |
| 319 |
drawShadow(); |
| 320 |
} |
| 321 |
} while (!drawPie() && attempts < REDRAW_ATTEMPTS)
|
| 322 |
|
| 323 |
if (attempts >= REDRAW_ATTEMPTS) {
|
| 324 |
clear(); |
| 325 |
target.prepend("<div class='error'>Could not draw pie with labels contained inside canvas</div>");
|
| 326 |
} |
| 327 |
|
| 328 |
if (plot.setSeries && plot.insertLegend) {
|
| 329 |
plot.setSeries(slices); |
| 330 |
plot.insertLegend(); |
| 331 |
} |
| 332 |
|
| 333 |
// we're actually done at this point, just defining internal functions at this point
|
| 334 |
|
| 335 |
function clear() { |
| 336 |
ctx.clearRect(0, 0, canvasWidth, canvasHeight); |
| 337 |
target.children().filter(".pieLabel, .pieLabelBackground").remove();
|
| 338 |
} |
| 339 |
|
| 340 |
function drawShadow() { |
| 341 |
|
| 342 |
var shadowLeft = options.series.pie.shadow.left;
|
| 343 |
var shadowTop = options.series.pie.shadow.top;
|
| 344 |
var edge = 10; |
| 345 |
var alpha = options.series.pie.shadow.alpha;
|
| 346 |
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
| 347 |
|
| 348 |
if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) { |
| 349 |
return; // shadow would be outside canvas, so don't draw it |
| 350 |
} |
| 351 |
|
| 352 |
ctx.save(); |
| 353 |
ctx.translate(shadowLeft,shadowTop); |
| 354 |
ctx.globalAlpha = alpha; |
| 355 |
ctx.fillStyle = "#000";
|
| 356 |
|
| 357 |
// center and rotate to starting position
|
| 358 |
|
| 359 |
ctx.translate(centerLeft,centerTop); |
| 360 |
ctx.scale(1, options.series.pie.tilt);
|
| 361 |
|
| 362 |
//radius -= edge;
|
| 363 |
|
| 364 |
for (var i = 1; i <= edge; i++) { |
| 365 |
ctx.beginPath(); |
| 366 |
ctx.arc(0, 0, radius, 0, Math.PI * 2, false); |
| 367 |
ctx.fill(); |
| 368 |
radius -= i; |
| 369 |
} |
| 370 |
|
| 371 |
ctx.restore(); |
| 372 |
} |
| 373 |
|
| 374 |
function drawPie() { |
| 375 |
|
| 376 |
var startAngle = Math.PI * options.series.pie.startAngle;
|
| 377 |
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
| 378 |
|
| 379 |
// center and rotate to starting position
|
| 380 |
|
| 381 |
ctx.save(); |
| 382 |
ctx.translate(centerLeft,centerTop); |
| 383 |
ctx.scale(1, options.series.pie.tilt);
|
| 384 |
//ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera
|
| 385 |
|
| 386 |
// draw slices
|
| 387 |
|
| 388 |
ctx.save(); |
| 389 |
var currentAngle = startAngle;
|
| 390 |
for (var i = 0; i < slices.length; ++i) { |
| 391 |
slices[i].startAngle = currentAngle; |
| 392 |
drawSlice(slices[i].angle, slices[i].color, true);
|
| 393 |
} |
| 394 |
ctx.restore(); |
| 395 |
|
| 396 |
// draw slice outlines
|
| 397 |
|
| 398 |
if (options.series.pie.stroke.width > 0) { |
| 399 |
ctx.save(); |
| 400 |
ctx.lineWidth = options.series.pie.stroke.width; |
| 401 |
currentAngle = startAngle; |
| 402 |
for (var i = 0; i < slices.length; ++i) { |
| 403 |
drawSlice(slices[i].angle, options.series.pie.stroke.color, false);
|
| 404 |
} |
| 405 |
ctx.restore(); |
| 406 |
} |
| 407 |
|
| 408 |
// draw donut hole
|
| 409 |
|
| 410 |
drawDonutHole(ctx); |
| 411 |
|
| 412 |
ctx.restore(); |
| 413 |
|
| 414 |
// Draw the labels, returning true if they fit within the plot
|
| 415 |
|
| 416 |
if (options.series.pie.label.show) {
|
| 417 |
return drawLabels();
|
| 418 |
} else return true; |
| 419 |
|
| 420 |
function drawSlice(angle, color, fill) { |
| 421 |
|
| 422 |
if (angle <= 0 || isNaN(angle)) { |
| 423 |
return;
|
| 424 |
} |
| 425 |
|
| 426 |
if (fill) {
|
| 427 |
ctx.fillStyle = color; |
| 428 |
} else {
|
| 429 |
ctx.strokeStyle = color; |
| 430 |
ctx.lineJoin = "round";
|
| 431 |
} |
| 432 |
|
| 433 |
ctx.beginPath(); |
| 434 |
if (Math.abs(angle - Math.PI * 2) > 0.000000001) { |
| 435 |
ctx.moveTo(0, 0); // Center of the pie |
| 436 |
} |
| 437 |
|
| 438 |
//ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
|
| 439 |
ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false); |
| 440 |
ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false); |
| 441 |
ctx.closePath(); |
| 442 |
//ctx.rotate(angle); // This doesn't work properly in Opera
|
| 443 |
currentAngle += angle; |
| 444 |
|
| 445 |
if (fill) {
|
| 446 |
ctx.fill(); |
| 447 |
} else {
|
| 448 |
ctx.stroke(); |
| 449 |
} |
| 450 |
} |
| 451 |
|
| 452 |
function drawLabels() { |
| 453 |
|
| 454 |
var currentAngle = startAngle;
|
| 455 |
var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius; |
| 456 |
|
| 457 |
for (var i = 0; i < slices.length; ++i) { |
| 458 |
if (slices[i].percent >= options.series.pie.label.threshold * 100) { |
| 459 |
if (!drawLabel(slices[i], currentAngle, i)) {
|
| 460 |
return false; |
| 461 |
} |
| 462 |
} |
| 463 |
currentAngle += slices[i].angle; |
| 464 |
} |
| 465 |
|
| 466 |
return true; |
| 467 |
|
| 468 |
function drawLabel(slice, startAngle, index) { |
| 469 |
|
| 470 |
if (slice.data[0][1] == 0) { |
| 471 |
return true; |
| 472 |
} |
| 473 |
|
| 474 |
// format label text
|
| 475 |
|
| 476 |
var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;
|
| 477 |
|
| 478 |
if (lf) {
|
| 479 |
text = lf(slice.label, slice); |
| 480 |
} else {
|
| 481 |
text = slice.label; |
| 482 |
} |
| 483 |
|
| 484 |
if (plf) {
|
| 485 |
text = plf(text, slice); |
| 486 |
} |
| 487 |
|
| 488 |
var halfAngle = ((startAngle + slice.angle) + startAngle) / 2; |
| 489 |
var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
|
| 490 |
var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;
|
| 491 |
|
| 492 |
var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>"; |
| 493 |
target.append(html); |
| 494 |
|
| 495 |
var label = target.children("#pieLabel" + index); |
| 496 |
var labelTop = (y - label.height() / 2); |
| 497 |
var labelLeft = (x - label.width() / 2); |
| 498 |
|
| 499 |
label.css("top", labelTop);
|
| 500 |
label.css("left", labelLeft);
|
| 501 |
|
| 502 |
// check to make sure that the label is not outside the canvas
|
| 503 |
|
| 504 |
if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) { |
| 505 |
return false; |
| 506 |
} |
| 507 |
|
| 508 |
if (options.series.pie.label.background.opacity != 0) { |
| 509 |
|
| 510 |
// put in the transparent background separately to avoid blended labels and label boxes
|
| 511 |
|
| 512 |
var c = options.series.pie.label.background.color;
|
| 513 |
|
| 514 |
if (c == null) { |
| 515 |
c = slice.color; |
| 516 |
} |
| 517 |
|
| 518 |
var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;"; |
| 519 |
$("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>") |
| 520 |
.css("opacity", options.series.pie.label.background.opacity)
|
| 521 |
.insertBefore(label); |
| 522 |
} |
| 523 |
|
| 524 |
return true; |
| 525 |
} // end individual label function
|
| 526 |
} // end drawLabels function
|
| 527 |
} // end drawPie function
|
| 528 |
} // end draw function
|
| 529 |
|
| 530 |
// Placed here because it needs to be accessed from multiple locations
|
| 531 |
|
| 532 |
function drawDonutHole(layer) { |
| 533 |
if (options.series.pie.innerRadius > 0) { |
| 534 |
|
| 535 |
// subtract the center
|
| 536 |
|
| 537 |
layer.save(); |
| 538 |
var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius; |
| 539 |
layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color |
| 540 |
layer.beginPath(); |
| 541 |
layer.fillStyle = options.series.pie.stroke.color; |
| 542 |
layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false); |
| 543 |
layer.fill(); |
| 544 |
layer.closePath(); |
| 545 |
layer.restore(); |
| 546 |
|
| 547 |
// add inner stroke
|
| 548 |
|
| 549 |
layer.save(); |
| 550 |
layer.beginPath(); |
| 551 |
layer.strokeStyle = options.series.pie.stroke.color; |
| 552 |
layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false); |
| 553 |
layer.stroke(); |
| 554 |
layer.closePath(); |
| 555 |
layer.restore(); |
| 556 |
|
| 557 |
// TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
|
| 558 |
} |
| 559 |
} |
| 560 |
|
| 561 |
//-- Additional Interactive related functions --
|
| 562 |
|
| 563 |
function isPointInPoly(poly, pt) { |
| 564 |
for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i) |
| 565 |
((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1])) |
| 566 |
&& (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0]) |
| 567 |
&& (c = !c); |
| 568 |
return c;
|
| 569 |
} |
| 570 |
|
| 571 |
function findNearbySlice(mouseX, mouseY) { |
| 572 |
|
| 573 |
var slices = plot.getData(),
|
| 574 |
options = plot.getOptions(), |
| 575 |
radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
|
| 576 |
x, y; |
| 577 |
|
| 578 |
for (var i = 0; i < slices.length; ++i) { |
| 579 |
|
| 580 |
var s = slices[i];
|
| 581 |
|
| 582 |
if (s.pie.show) {
|
| 583 |
|
| 584 |
ctx.save(); |
| 585 |
ctx.beginPath(); |
| 586 |
ctx.moveTo(0, 0); // Center of the pie |
| 587 |
//ctx.scale(1, options.series.pie.tilt); // this actually seems to break everything when here.
|
| 588 |
ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false); |
| 589 |
ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false); |
| 590 |
ctx.closePath(); |
| 591 |
x = mouseX - centerLeft; |
| 592 |
y = mouseY - centerTop; |
| 593 |
|
| 594 |
if (ctx.isPointInPath) {
|
| 595 |
if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
|
| 596 |
ctx.restore(); |
| 597 |
return {
|
| 598 |
datapoint: [s.percent, s.data],
|
| 599 |
dataIndex: 0, |
| 600 |
series: s,
|
| 601 |
seriesIndex: i
|
| 602 |
}; |
| 603 |
} |
| 604 |
} else {
|
| 605 |
|
| 606 |
// excanvas for IE doesn;t support isPointInPath, this is a workaround.
|
| 607 |
|
| 608 |
var p1X = radius * Math.cos(s.startAngle),
|
| 609 |
p1Y = radius * Math.sin(s.startAngle), |
| 610 |
p2X = radius * Math.cos(s.startAngle + s.angle / 4),
|
| 611 |
p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
|
| 612 |
p3X = radius * Math.cos(s.startAngle + s.angle / 2),
|
| 613 |
p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
|
| 614 |
p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
|
| 615 |
p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
|
| 616 |
p5X = radius * Math.cos(s.startAngle + s.angle), |
| 617 |
p5Y = radius * Math.sin(s.startAngle + s.angle), |
| 618 |
arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]], |
| 619 |
arrPoint = [x, y]; |
| 620 |
|
| 621 |
// TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?
|
| 622 |
|
| 623 |
if (isPointInPoly(arrPoly, arrPoint)) {
|
| 624 |
ctx.restore(); |
| 625 |
return {
|
| 626 |
datapoint: [s.percent, s.data],
|
| 627 |
dataIndex: 0, |
| 628 |
series: s,
|
| 629 |
seriesIndex: i
|
| 630 |
}; |
| 631 |
} |
| 632 |
} |
| 633 |
|
| 634 |
ctx.restore(); |
| 635 |
} |
| 636 |
} |
| 637 |
|
| 638 |
return null; |
| 639 |
} |
| 640 |
|
| 641 |
function onMouseMove(e) { |
| 642 |
triggerClickHoverEvent("plothover", e);
|
| 643 |
} |
| 644 |
|
| 645 |
function onClick(e) { |
| 646 |
triggerClickHoverEvent("plotclick", e);
|
| 647 |
} |
| 648 |
|
| 649 |
// trigger click or hover event (they send the same parameters so we share their code)
|
| 650 |
|
| 651 |
function triggerClickHoverEvent(eventname, e) { |
| 652 |
|
| 653 |
var offset = plot.offset();
|
| 654 |
var canvasX = parseInt(e.pageX - offset.left);
|
| 655 |
var canvasY = parseInt(e.pageY - offset.top);
|
| 656 |
var item = findNearbySlice(canvasX, canvasY);
|
| 657 |
|
| 658 |
if (options.grid.autoHighlight) {
|
| 659 |
|
| 660 |
// clear auto-highlights
|
| 661 |
|
| 662 |
for (var i = 0; i < highlights.length; ++i) { |
| 663 |
var h = highlights[i];
|
| 664 |
if (h.auto == eventname && !(item && h.series == item.series)) {
|
| 665 |
unhighlight(h.series); |
| 666 |
} |
| 667 |
} |
| 668 |
} |
| 669 |
|
| 670 |
// highlight the slice
|
| 671 |
|
| 672 |
if (item) {
|
| 673 |
highlight(item.series, eventname); |
| 674 |
} |
| 675 |
|
| 676 |
// trigger any hover bind events
|
| 677 |
|
| 678 |
var pos = { pageX: e.pageX, pageY: e.pageY }; |
| 679 |
target.trigger(eventname, [pos, item]); |
| 680 |
} |
| 681 |
|
| 682 |
function highlight(s, auto) { |
| 683 |
//if (typeof s == "number") {
|
| 684 |
// s = series[s];
|
| 685 |
//}
|
| 686 |
|
| 687 |
var i = indexOfHighlight(s);
|
| 688 |
|
| 689 |
if (i == -1) { |
| 690 |
highlights.push({ series: s, auto: auto });
|
| 691 |
plot.triggerRedrawOverlay(); |
| 692 |
} else if (!auto) { |
| 693 |
highlights[i].auto = false;
|
| 694 |
} |
| 695 |
} |
| 696 |
|
| 697 |
function unhighlight(s) { |
| 698 |
if (s == null) { |
| 699 |
highlights = []; |
| 700 |
plot.triggerRedrawOverlay(); |
| 701 |
} |
| 702 |
|
| 703 |
//if (typeof s == "number") {
|
| 704 |
// s = series[s];
|
| 705 |
//}
|
| 706 |
|
| 707 |
var i = indexOfHighlight(s);
|
| 708 |
|
| 709 |
if (i != -1) { |
| 710 |
highlights.splice(i, 1);
|
| 711 |
plot.triggerRedrawOverlay(); |
| 712 |
} |
| 713 |
} |
| 714 |
|
| 715 |
function indexOfHighlight(s) { |
| 716 |
for (var i = 0; i < highlights.length; ++i) { |
| 717 |
var h = highlights[i];
|
| 718 |
if (h.series == s)
|
| 719 |
return i;
|
| 720 |
} |
| 721 |
return -1; |
| 722 |
} |
| 723 |
|
| 724 |
function drawOverlay(plot, octx) { |
| 725 |
|
| 726 |
var options = plot.getOptions();
|
| 727 |
|
| 728 |
var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius; |
| 729 |
|
| 730 |
octx.save(); |
| 731 |
octx.translate(centerLeft, centerTop); |
| 732 |
octx.scale(1, options.series.pie.tilt);
|
| 733 |
|
| 734 |
for (var i = 0; i < highlights.length; ++i) { |
| 735 |
drawHighlight(highlights[i].series); |
| 736 |
} |
| 737 |
|
| 738 |
drawDonutHole(octx); |
| 739 |
|
| 740 |
octx.restore(); |
| 741 |
|
| 742 |
function drawHighlight(series) { |
| 743 |
|
| 744 |
if (series.angle <= 0 || isNaN(series.angle)) { |
| 745 |
return;
|
| 746 |
} |
| 747 |
|
| 748 |
//octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
|
| 749 |
octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor |
| 750 |
octx.beginPath(); |
| 751 |
if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) { |
| 752 |
octx.moveTo(0, 0); // Center of the pie |
| 753 |
} |
| 754 |
octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false); |
| 755 |
octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false); |
| 756 |
octx.closePath(); |
| 757 |
octx.fill(); |
| 758 |
} |
| 759 |
} |
| 760 |
} // end init (plugin body)
|
| 761 |
|
| 762 |
// define pie specific options and their default values
|
| 763 |
|
| 764 |
var options = {
|
| 765 |
series: {
|
| 766 |
pie: {
|
| 767 |
show: false, |
| 768 |
radius: "auto", // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value) |
| 769 |
innerRadius: 0, /* for donut */ |
| 770 |
startAngle: 3/2, |
| 771 |
tilt: 1, |
| 772 |
shadow: {
|
| 773 |
left: 5, // shadow left offset |
| 774 |
top: 15, // shadow top offset |
| 775 |
alpha: 0.02 // shadow alpha |
| 776 |
}, |
| 777 |
offset: {
|
| 778 |
top: 0, |
| 779 |
left: "auto" |
| 780 |
}, |
| 781 |
stroke: {
|
| 782 |
color: "#fff", |
| 783 |
width: 1 |
| 784 |
}, |
| 785 |
label: {
|
| 786 |
show: "auto", |
| 787 |
formatter: function(label, slice) { |
| 788 |
return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>"; |
| 789 |
}, // formatter function
|
| 790 |
radius: 1, // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value) |
| 791 |
background: {
|
| 792 |
color: null, |
| 793 |
opacity: 0 |
| 794 |
}, |
| 795 |
threshold: 0 // percentage at which to hide the label (i.e. the slice is too narrow) |
| 796 |
}, |
| 797 |
combine: {
|
| 798 |
threshold: -1, // percentage at which to combine little slices into one larger slice |
| 799 |
color: null, // color to give the new slice (auto-generated if null) |
| 800 |
label: "Other" // label to give the new slice |
| 801 |
}, |
| 802 |
highlight: {
|
| 803 |
//color: "#fff", // will add this functionality once parseColor is available
|
| 804 |
opacity: 0.5 |
| 805 |
} |
| 806 |
} |
| 807 |
} |
| 808 |
}; |
| 809 |
|
| 810 |
$.plot.plugins.push({
|
| 811 |
init: init,
|
| 812 |
options: options,
|
| 813 |
name: "pie", |
| 814 |
version: "1.1" |
| 815 |
}); |
| 816 |
|
| 817 |
})(jQuery); |