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circle-progress.js
553 lines
| 1 | /** |
| 2 | * jquery-circle-progress - jQuery Plugin to draw animated circular progress bars: |
| 3 | * {@link http://kottenator.github.io/jquery-circle-progress/} |
| 4 | * |
| 5 | * @author Rostyslav Bryzgunov <kottenator@gmail.com> |
| 6 | * @version 1.2.2 |
| 7 | * @licence MIT |
| 8 | * @preserve |
| 9 | */ |
| 10 | // UMD factory - https://github.com/umdjs/umd/blob/d31bb6ee7098715e019f52bdfe27b3e4bfd2b97e/templates/jqueryPlugin.js |
| 11 | // Uses AMD, CommonJS or browser globals to create a jQuery plugin. |
| 12 | (function(factory) { |
| 13 | if (typeof define === 'function' && define.amd) { |
| 14 | // AMD - register as an anonymous module |
| 15 | define(['jquery'], factory); |
| 16 | } else if (typeof module === 'object' && module.exports) { |
| 17 | // Node/CommonJS |
| 18 | var $ = require('jquery'); |
| 19 | factory($); |
| 20 | module.exports = $; |
| 21 | } else { |
| 22 | // Browser globals |
| 23 | factory(jQuery); |
| 24 | } |
| 25 | })(function($) { |
| 26 | /** |
| 27 | * Inner implementation of the circle progress bar. |
| 28 | * The class is not exposed _yet_ but you can create an instance through jQuery method call. |
| 29 | * |
| 30 | * @param {object} config - You can customize any class member (property or method). |
| 31 | * @class |
| 32 | * @alias CircleProgress |
| 33 | */ |
| 34 | function CircleProgress(config) { |
| 35 | this.init(config); |
| 36 | } |
| 37 | |
| 38 | CircleProgress.prototype = { |
| 39 | //--------------------------------------- public options --------------------------------------- |
| 40 | /** |
| 41 | * This is the only required option. It should be from `0.0` to `1.0`. |
| 42 | * @type {number} |
| 43 | * @default 0.0 |
| 44 | */ |
| 45 | value: 0.0, |
| 46 | |
| 47 | /** |
| 48 | * Size of the canvas in pixels. |
| 49 | * It's a square so we need only one dimension. |
| 50 | * @type {number} |
| 51 | * @default 100.0 |
| 52 | */ |
| 53 | size: 100.0, |
| 54 | |
| 55 | /** |
| 56 | * Initial angle for `0.0` value in radians. |
| 57 | * @type {number} |
| 58 | * @default -Math.PI |
| 59 | */ |
| 60 | startAngle: -Math.PI, |
| 61 | |
| 62 | /** |
| 63 | * Width of the arc in pixels. |
| 64 | * If it's `'auto'` - the value is calculated as `[this.size]{@link CircleProgress#size} / 14`. |
| 65 | * @type {number|string} |
| 66 | * @default 'auto' |
| 67 | */ |
| 68 | thickness: 'auto', |
| 69 | |
| 70 | /** |
| 71 | * Fill of the arc. You may set it to: |
| 72 | * |
| 73 | * - solid color: |
| 74 | * - `'#3aeabb'` |
| 75 | * - `{ color: '#3aeabb' }` |
| 76 | * - `{ color: 'rgba(255, 255, 255, .3)' }` |
| 77 | * - linear gradient _(left to right)_: |
| 78 | * - `{ gradient: ['#3aeabb', '#fdd250'], gradientAngle: Math.PI / 4 }` |
| 79 | * - `{ gradient: ['red', 'green', 'blue'], gradientDirection: [x0, y0, x1, y1] }` |
| 80 | * - `{ gradient: [["red", .2], ["green", .3], ["blue", .8]] }` |
| 81 | * - image: |
| 82 | * - `{ image: 'http://i.imgur.com/pT0i89v.png' }` |
| 83 | * - `{ image: imageObject }` |
| 84 | * - `{ color: 'lime', image: 'http://i.imgur.com/pT0i89v.png' }` - |
| 85 | * color displayed until the image is loaded |
| 86 | * |
| 87 | * @default {gradient: ['#3aeabb', '#fdd250']} |
| 88 | */ |
| 89 | fill: { |
| 90 | gradient: ['#3aeabb', '#fdd250'] |
| 91 | }, |
| 92 | |
| 93 | /** |
| 94 | * Color of the "empty" arc. Only a color fill supported by now. |
| 95 | * @type {string} |
| 96 | * @default 'rgba(0, 0, 0, .1)' |
| 97 | */ |
| 98 | emptyFill: 'rgba(0, 0, 0, .1)', |
| 99 | |
| 100 | /** |
| 101 | * jQuery Animation config. |
| 102 | * You can pass `false` to disable the animation. |
| 103 | * @see http://api.jquery.com/animate/ |
| 104 | * @type {object|boolean} |
| 105 | * @default {duration: 1200, easing: 'circleProgressEasing'} |
| 106 | */ |
| 107 | animation: { |
| 108 | duration: 1200, |
| 109 | easing: 'circleProgressEasing' |
| 110 | }, |
| 111 | |
| 112 | /** |
| 113 | * Default animation starts at `0.0` and ends at specified `value`. Let's call this _direct animation_. |
| 114 | * If you want to make _reversed animation_ - set `animationStartValue: 1.0`. |
| 115 | * Also you may specify any other value from `0.0` to `1.0`. |
| 116 | * @type {number} |
| 117 | * @default 0.0 |
| 118 | */ |
| 119 | animationStartValue: 0.0, |
| 120 | |
| 121 | /** |
| 122 | * Reverse animation and arc draw. |
| 123 | * By default, the arc is filled from `0.0` to `value`, _clockwise_. |
| 124 | * With `reverse: true` the arc is filled from `1.0` to `value`, _counter-clockwise_. |
| 125 | * @type {boolean} |
| 126 | * @default false |
| 127 | */ |
| 128 | reverse: false, |
| 129 | |
| 130 | /** |
| 131 | * Arc line cap: `'butt'`, `'round'` or `'square'` - |
| 132 | * [read more]{@link https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D.lineCap}. |
| 133 | * @type {string} |
| 134 | * @default 'butt' |
| 135 | */ |
| 136 | lineCap: 'butt', |
| 137 | |
| 138 | /** |
| 139 | * Canvas insertion mode: append or prepend it into the parent element? |
| 140 | * @type {string} |
| 141 | * @default 'prepend' |
| 142 | */ |
| 143 | insertMode: 'prepend', |
| 144 | |
| 145 | //------------------------------ protected properties and methods ------------------------------ |
| 146 | /** |
| 147 | * Link to {@link CircleProgress} constructor. |
| 148 | * @protected |
| 149 | */ |
| 150 | constructor: CircleProgress, |
| 151 | |
| 152 | /** |
| 153 | * Container element. Should be passed into constructor config. |
| 154 | * @protected |
| 155 | * @type {jQuery} |
| 156 | */ |
| 157 | el: null, |
| 158 | |
| 159 | /** |
| 160 | * Canvas element. Automatically generated and prepended to [this.el]{@link CircleProgress#el}. |
| 161 | * @protected |
| 162 | * @type {HTMLCanvasElement} |
| 163 | */ |
| 164 | canvas: null, |
| 165 | |
| 166 | /** |
| 167 | * 2D-context of [this.canvas]{@link CircleProgress#canvas}. |
| 168 | * @protected |
| 169 | * @type {CanvasRenderingContext2D} |
| 170 | */ |
| 171 | ctx: null, |
| 172 | |
| 173 | /** |
| 174 | * Radius of the outer circle. Automatically calculated as `[this.size]{@link CircleProgress#size} / 2`. |
| 175 | * @protected |
| 176 | * @type {number} |
| 177 | */ |
| 178 | radius: 0.0, |
| 179 | |
| 180 | /** |
| 181 | * Fill of the main arc. Automatically calculated, depending on [this.fill]{@link CircleProgress#fill} option. |
| 182 | * @protected |
| 183 | * @type {string|CanvasGradient|CanvasPattern} |
| 184 | */ |
| 185 | arcFill: null, |
| 186 | |
| 187 | /** |
| 188 | * Last rendered frame value. |
| 189 | * @protected |
| 190 | * @type {number} |
| 191 | */ |
| 192 | lastFrameValue: 0.0, |
| 193 | |
| 194 | /** |
| 195 | * Init/re-init the widget. |
| 196 | * |
| 197 | * Throws a jQuery event: |
| 198 | * |
| 199 | * - `circle-inited(jqEvent)` |
| 200 | * |
| 201 | * @param {object} config - You can customize any class member (property or method). |
| 202 | */ |
| 203 | init: function(config) { |
| 204 | $.extend(this, config); |
| 205 | this.radius = this.size / 2; |
| 206 | this.initWidget(); |
| 207 | this.initFill(); |
| 208 | this.draw(); |
| 209 | this.el.trigger('circle-inited'); |
| 210 | }, |
| 211 | |
| 212 | /** |
| 213 | * Initialize `<canvas>`. |
| 214 | * @protected |
| 215 | */ |
| 216 | initWidget: function() { |
| 217 | if (!this.canvas) |
| 218 | this.canvas = $('<canvas>')[this.insertMode == 'prepend' ? 'prependTo' : 'appendTo'](this.el)[0]; |
| 219 | |
| 220 | var canvas = this.canvas; |
| 221 | canvas.width = this.size; |
| 222 | canvas.height = this.size; |
| 223 | this.ctx = canvas.getContext('2d'); |
| 224 | |
| 225 | if (window.devicePixelRatio > 1) { |
| 226 | var scaleBy = window.devicePixelRatio; |
| 227 | canvas.style.width = canvas.style.height = this.size + 'px'; |
| 228 | canvas.width = canvas.height = this.size * scaleBy; |
| 229 | this.ctx.scale(scaleBy, scaleBy); |
| 230 | } |
| 231 | }, |
| 232 | |
| 233 | /** |
| 234 | * This method sets [this.arcFill]{@link CircleProgress#arcFill}. |
| 235 | * It could do this async (on image load). |
| 236 | * @protected |
| 237 | */ |
| 238 | initFill: function() { |
| 239 | var self = this, |
| 240 | fill = this.fill, |
| 241 | ctx = this.ctx, |
| 242 | size = this.size; |
| 243 | |
| 244 | if (!fill) |
| 245 | throw Error("The fill is not specified!"); |
| 246 | |
| 247 | if (typeof fill == 'string') |
| 248 | fill = {color: fill}; |
| 249 | |
| 250 | if (fill.color) |
| 251 | this.arcFill = fill.color; |
| 252 | |
| 253 | if (fill.gradient) { |
| 254 | var gr = fill.gradient; |
| 255 | |
| 256 | if (gr.length == 1) { |
| 257 | this.arcFill = gr[0]; |
| 258 | } else if (gr.length > 1) { |
| 259 | var ga = fill.gradientAngle || 0, // gradient direction angle; 0 by default |
| 260 | gd = fill.gradientDirection || [ |
| 261 | size / 2 * (1 - Math.cos(ga)), // x0 |
| 262 | size / 2 * (1 + Math.sin(ga)), // y0 |
| 263 | size / 2 * (1 + Math.cos(ga)), // x1 |
| 264 | size / 2 * (1 - Math.sin(ga)) // y1 |
| 265 | ]; |
| 266 | |
| 267 | var lg = ctx.createLinearGradient.apply(ctx, gd); |
| 268 | |
| 269 | for (var i = 0; i < gr.length; i++) { |
| 270 | var color = gr[i], |
| 271 | pos = i / (gr.length - 1); |
| 272 | |
| 273 | if ($.isArray(color)) { |
| 274 | pos = color[1]; |
| 275 | color = color[0]; |
| 276 | } |
| 277 | |
| 278 | lg.addColorStop(pos, color); |
| 279 | } |
| 280 | |
| 281 | this.arcFill = lg; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | if (fill.image) { |
| 286 | var img; |
| 287 | |
| 288 | if (fill.image instanceof Image) { |
| 289 | img = fill.image; |
| 290 | } else { |
| 291 | img = new Image(); |
| 292 | img.src = fill.image; |
| 293 | } |
| 294 | |
| 295 | if (img.complete) |
| 296 | setImageFill(); |
| 297 | else |
| 298 | img.onload = setImageFill; |
| 299 | } |
| 300 | |
| 301 | function setImageFill() { |
| 302 | var bg = $('<canvas>')[0]; |
| 303 | bg.width = self.size; |
| 304 | bg.height = self.size; |
| 305 | bg.getContext('2d').drawImage(img, 0, 0, size, size); |
| 306 | self.arcFill = self.ctx.createPattern(bg, 'no-repeat'); |
| 307 | self.drawFrame(self.lastFrameValue); |
| 308 | } |
| 309 | }, |
| 310 | |
| 311 | /** |
| 312 | * Draw the circle. |
| 313 | * @protected |
| 314 | */ |
| 315 | draw: function() { |
| 316 | if (this.animation) |
| 317 | this.drawAnimated(this.value); |
| 318 | else |
| 319 | this.drawFrame(this.value); |
| 320 | }, |
| 321 | |
| 322 | /** |
| 323 | * Draw a single animation frame. |
| 324 | * @protected |
| 325 | * @param {number} v - Frame value. |
| 326 | */ |
| 327 | drawFrame: function(v) { |
| 328 | this.lastFrameValue = v; |
| 329 | this.ctx.clearRect(0, 0, this.size, this.size); |
| 330 | this.drawEmptyArc(v); |
| 331 | this.drawArc(v); |
| 332 | }, |
| 333 | |
| 334 | /** |
| 335 | * Draw the arc (part of the circle). |
| 336 | * @protected |
| 337 | * @param {number} v - Frame value. |
| 338 | */ |
| 339 | drawArc: function(v) { |
| 340 | if (v === 0) |
| 341 | return; |
| 342 | |
| 343 | var ctx = this.ctx, |
| 344 | r = this.radius, |
| 345 | t = this.getThickness(), |
| 346 | a = this.startAngle; |
| 347 | |
| 348 | ctx.save(); |
| 349 | ctx.beginPath(); |
| 350 | |
| 351 | if (!this.reverse) { |
| 352 | ctx.arc(r, r, r - t / 2, a, a + Math.PI * 2 * v); |
| 353 | } else { |
| 354 | ctx.arc(r, r, r - t / 2, a - Math.PI * 2 * v, a); |
| 355 | } |
| 356 | |
| 357 | ctx.lineWidth = t; |
| 358 | ctx.lineCap = this.lineCap; |
| 359 | ctx.strokeStyle = this.arcFill; |
| 360 | ctx.stroke(); |
| 361 | ctx.restore(); |
| 362 | }, |
| 363 | |
| 364 | /** |
| 365 | * Draw the _empty (background)_ arc (part of the circle). |
| 366 | * @protected |
| 367 | * @param {number} v - Frame value. |
| 368 | */ |
| 369 | drawEmptyArc: function(v) { |
| 370 | var ctx = this.ctx, |
| 371 | r = this.radius, |
| 372 | t = this.getThickness(), |
| 373 | a = this.startAngle; |
| 374 | |
| 375 | if (v < 1) { |
| 376 | ctx.save(); |
| 377 | ctx.beginPath(); |
| 378 | |
| 379 | if (v <= 0) { |
| 380 | ctx.arc(r, r, r - t / 2, 0, Math.PI * 2); |
| 381 | } else { |
| 382 | if (!this.reverse) { |
| 383 | ctx.arc(r, r, r - t / 2, a + Math.PI * 2 * v, a); |
| 384 | } else { |
| 385 | ctx.arc(r, r, r - t / 2, a, a - Math.PI * 2 * v); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | ctx.lineWidth = t; |
| 390 | ctx.strokeStyle = this.emptyFill; |
| 391 | ctx.stroke(); |
| 392 | ctx.restore(); |
| 393 | } |
| 394 | }, |
| 395 | |
| 396 | /** |
| 397 | * Animate the progress bar. |
| 398 | * |
| 399 | * Throws 3 jQuery events: |
| 400 | * |
| 401 | * - `circle-animation-start(jqEvent)` |
| 402 | * - `circle-animation-progress(jqEvent, animationProgress, stepValue)` - multiple event |
| 403 | * animationProgress: from `0.0` to `1.0`; stepValue: from `0.0` to `value` |
| 404 | * - `circle-animation-end(jqEvent)` |
| 405 | * |
| 406 | * @protected |
| 407 | * @param {number} v - Final value. |
| 408 | */ |
| 409 | drawAnimated: function(v) { |
| 410 | var self = this, |
| 411 | el = this.el, |
| 412 | canvas = $(this.canvas); |
| 413 | |
| 414 | // stop previous animation before new "start" event is triggered |
| 415 | canvas.stop(true, false); |
| 416 | el.trigger('circle-animation-start'); |
| 417 | |
| 418 | canvas |
| 419 | .css({animationProgress: 0}) |
| 420 | .animate({animationProgress: 1}, $.extend({}, this.animation, { |
| 421 | step: function(animationProgress) { |
| 422 | var stepValue = self.animationStartValue * (1 - animationProgress) + v * animationProgress; |
| 423 | self.drawFrame(stepValue); |
| 424 | el.trigger('circle-animation-progress', [animationProgress, stepValue]); |
| 425 | } |
| 426 | })) |
| 427 | .promise() |
| 428 | .always(function() { |
| 429 | // trigger on both successful & failure animation end |
| 430 | el.trigger('circle-animation-end'); |
| 431 | }); |
| 432 | }, |
| 433 | |
| 434 | /** |
| 435 | * Get the circle thickness. |
| 436 | * @see CircleProgress#thickness |
| 437 | * @protected |
| 438 | * @returns {number} |
| 439 | */ |
| 440 | getThickness: function() { |
| 441 | return $.isNumeric(this.thickness) ? this.thickness : this.size / 14; |
| 442 | }, |
| 443 | |
| 444 | /** |
| 445 | * Get current value. |
| 446 | * @protected |
| 447 | * @return {number} |
| 448 | */ |
| 449 | getValue: function() { |
| 450 | return this.value; |
| 451 | }, |
| 452 | |
| 453 | /** |
| 454 | * Set current value (with smooth animation transition). |
| 455 | * @protected |
| 456 | * @param {number} newValue |
| 457 | */ |
| 458 | setValue: function(newValue) { |
| 459 | if (this.animation) |
| 460 | this.animationStartValue = this.lastFrameValue; |
| 461 | this.value = newValue; |
| 462 | this.draw(); |
| 463 | } |
| 464 | }; |
| 465 | |
| 466 | //----------------------------------- Initiating jQuery plugin ----------------------------------- |
| 467 | $.circleProgress = { |
| 468 | // Default options (you may override them) |
| 469 | defaults: CircleProgress.prototype |
| 470 | }; |
| 471 | |
| 472 | // ease-in-out-cubic |
| 473 | $.easing.circleProgressEasing = function(x) { |
| 474 | if (x < 0.5) { |
| 475 | x = 2 * x; |
| 476 | return 0.5 * x * x * x; |
| 477 | } else { |
| 478 | x = 2 - 2 * x; |
| 479 | return 1 - 0.5 * x * x * x; |
| 480 | } |
| 481 | }; |
| 482 | |
| 483 | /** |
| 484 | * Creates an instance of {@link CircleProgress}. |
| 485 | * Produces [init event]{@link CircleProgress#init} and [animation events]{@link CircleProgress#drawAnimated}. |
| 486 | * |
| 487 | * @param {object} [configOrCommand] - Config object or command name. |
| 488 | * |
| 489 | * Config example (you can specify any {@link CircleProgress} property): |
| 490 | * |
| 491 | * ```js |
| 492 | * { value: 0.75, size: 50, animation: false } |
| 493 | * ``` |
| 494 | * |
| 495 | * Commands: |
| 496 | * |
| 497 | * ```js |
| 498 | * el.circleProgress('widget'); // get the <canvas> |
| 499 | * el.circleProgress('value'); // get the value |
| 500 | * el.circleProgress('value', newValue); // update the value |
| 501 | * el.circleProgress('redraw'); // redraw the circle |
| 502 | * el.circleProgress(); // the same as 'redraw' |
| 503 | * ``` |
| 504 | * |
| 505 | * @param {string} [commandArgument] - Some commands (like `'value'`) may require an argument. |
| 506 | * @see CircleProgress |
| 507 | * @alias "$(...).circleProgress" |
| 508 | */ |
| 509 | $.fn.circleProgress = function(configOrCommand, commandArgument) { |
| 510 | var dataName = 'circle-progress', |
| 511 | firstInstance = this.data(dataName); |
| 512 | |
| 513 | if (configOrCommand == 'widget') { |
| 514 | if (!firstInstance) |
| 515 | throw Error('Calling "widget" method on not initialized instance is forbidden'); |
| 516 | return firstInstance.canvas; |
| 517 | } |
| 518 | |
| 519 | if (configOrCommand == 'value') { |
| 520 | if (!firstInstance) |
| 521 | throw Error('Calling "value" method on not initialized instance is forbidden'); |
| 522 | if (typeof commandArgument == 'undefined') { |
| 523 | return firstInstance.getValue(); |
| 524 | } else { |
| 525 | var newValue = arguments[1]; |
| 526 | return this.each(function() { |
| 527 | $(this).data(dataName).setValue(newValue); |
| 528 | }); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | return this.each(function() { |
| 533 | var el = $(this), |
| 534 | instance = el.data(dataName), |
| 535 | config = $.isPlainObject(configOrCommand) ? configOrCommand : {}; |
| 536 | |
| 537 | if (instance) { |
| 538 | instance.init(config); |
| 539 | } else { |
| 540 | var initialConfig = $.extend({}, el.data()); |
| 541 | if (typeof initialConfig.fill == 'string') |
| 542 | initialConfig.fill = JSON.parse(initialConfig.fill); |
| 543 | if (typeof initialConfig.animation == 'string') |
| 544 | initialConfig.animation = JSON.parse(initialConfig.animation); |
| 545 | config = $.extend(initialConfig, config); |
| 546 | config.el = el; |
| 547 | instance = new CircleProgress(config); |
| 548 | el.data(dataName, instance); |
| 549 | } |
| 550 | }); |
| 551 | }; |
| 552 | }); |
| 553 |