src/ceph/src/pybind/mgr/dashboard/static/AdminLTE-2.3.7/plugins/knob/jquery.knob.js

   1 /*!jQuery Knob*/
   2 /**
   3  * Downward compatible, touchable dial
   4  *
   5  * Version: 1.2.11
   6  * Requires: jQuery v1.7+
   7  *
   8  * Copyright (c) 2012 Anthony Terrien
   9  * Under MIT License (http://www.opensource.org/licenses/mit-license.php)
  10  *
  11  * Thanks to vor, eskimoblood, spiffistan, FabrizioC
  12  */
  13 (function (factory) {
  14     if (typeof exports === 'object') {
  15         // CommonJS
  16         module.exports = factory(require('jquery'));
  17     } else if (typeof define === 'function' && define.amd) {
  18         // AMD. Register as an anonymous module.
  19         define(['jquery'], factory);
  20     } else {
  21         // Browser globals
  22         factory(jQuery);
  23     }
  24 }(function ($) {
  25
  26     /**
  27      * Kontrol library
  28      */
  29     "use strict";
  30
  31     /**
  32      * Definition of globals and core
  33      */
  34     var k = {}, // kontrol
  35         max = Math.max,
  36         min = Math.min;
  37
  38     k.c = {};
  39     k.c.d = $(document);
  40     k.c.t = function (e) {
  41         return e.originalEvent.touches.length - 1;
  42     };
  43
  44     /**
  45      * Kontrol Object
  46      *
  47      * Definition of an abstract UI control
  48      *
  49      * Each concrete component must call this one.
  50      * <code>
  51      * k.o.call(this);
  52      * </code>
  53      */
  54     k.o = function () {
  55         var s = this;
  56
  57         this.o = null; // array of options
  58         this.$ = null; // jQuery wrapped element
  59         this.i = null; // mixed HTMLInputElement or array of HTMLInputElement
  60         this.g = null; // deprecated 2D graphics context for 'pre-rendering'
  61         this.v = null; // value ; mixed array or integer
  62         this.cv = null; // change value ; not commited value
  63         this.x = 0; // canvas x position
  64         this.y = 0; // canvas y position
  65         this.w = 0; // canvas width
  66         this.h = 0; // canvas height
  67         this.$c = null; // jQuery canvas element
  68         this.c = null; // rendered canvas context
  69         this.t = 0; // touches index
  70         this.isInit = false;
  71         this.fgColor = null; // main color
  72         this.pColor = null; // previous color
  73         this.dH = null; // draw hook
  74         this.cH = null; // change hook
  75         this.eH = null; // cancel hook
  76         this.rH = null; // release hook
  77         this.scale = 1; // scale factor
  78         this.relative = false;
  79         this.relativeWidth = false;
  80         this.relativeHeight = false;
  81         this.$div = null; // component div
  82
  83         this.run = function () {
  84             var cf = function (e, conf) {
  85                 var k;
  86                 for (k in conf) {
  87                     s.o[k] = conf[k];
  88                 }
  89                 s._carve().init();
  90                 s._configure()
  91                  ._draw();
  92             };
  93
  94             if (this.$.data('kontroled')) return;
  95             this.$.data('kontroled', true);
  96
  97             this.extend();
  98             this.o = $.extend({
  99                     // Config
 100                     min: this.$.data('min') !== undefined ? this.$.data('min') : 0,
 101                     max: this.$.data('max') !== undefined ? this.$.data('max') : 100,
 102                     stopper: true,
 103                     readOnly: this.$.data('readonly') || (this.$.attr('readonly') === 'readonly'),
 104
 105                     // UI
 106                     cursor: this.$.data('cursor') === true && 30
 107                             || this.$.data('cursor') || 0,
 108                     thickness: this.$.data('thickness')
 109                                && Math.max(Math.min(this.$.data('thickness'), 1), 0.01)
 110                                || 0.35,
 111                     lineCap: this.$.data('linecap') || 'butt',
 112                     width: this.$.data('width') || 200,
 113                     height: this.$.data('height') || 200,
 114                     displayInput: this.$.data('displayinput') == null || this.$.data('displayinput'),
 115                     displayPrevious: this.$.data('displayprevious'),
 116                     fgColor: this.$.data('fgcolor') || '#87CEEB',
 117                     inputColor: this.$.data('inputcolor'),
 118                     font: this.$.data('font') || 'Arial',
 119                     fontWeight: this.$.data('font-weight') || 'bold',
 120                     inline: false,
 121                     step: this.$.data('step') || 1,
 122                     rotation: this.$.data('rotation'),
 123
 124                     // Hooks
 125                     draw: null, // function () {}
 126                     change: null, // function (value) {}
 127                     cancel: null, // function () {}
 128                     release: null, // function (value) {}
 129
 130                     // Output formatting, allows to add unit: %, ms ...
 131                     format: function(v) {
 132                         return v;
 133                     },
 134                     parse: function (v) {
 135                         return parseFloat(v);
 136                     }
 137                 }, this.o
 138             );
 139
 140             // finalize options
 141             this.o.flip = this.o.rotation === 'anticlockwise' || this.o.rotation === 'acw';
 142             if (!this.o.inputColor) {
 143                 this.o.inputColor = this.o.fgColor;
 144             }
 145
 146             // routing value
 147             if (this.$.is('fieldset')) {
 148
 149                 // fieldset = array of integer
 150                 this.v = {};
 151                 this.i = this.$.find('input');
 152                 this.i.each(function(k) {
 153                     var $this = $(this);
 154                     s.i[k] = $this;
 155                     s.v[k] = s.o.parse($this.val());
 156
 157                     $this.bind(
 158                         'change blur',
 159                         function () {
 160                             var val = {};
 161                             val[k] = $this.val();
 162                             s.val(s._validate(val));
 163                         }
 164                     );
 165                 });
 166                 this.$.find('legend').remove();
 167             } else {
 168
 169                 // input = integer
 170                 this.i = this.$;
 171                 this.v = this.o.parse(this.$.val());
 172                 this.v === '' && (this.v = this.o.min);
 173                 this.$.bind(
 174                     'change blur',
 175                     function () {
 176                         s.val(s._validate(s.o.parse(s.$.val())));
 177                     }
 178                 );
 179
 180             }
 181
 182             !this.o.displayInput && this.$.hide();
 183
 184             // adds needed DOM elements (canvas, div)
 185             this.$c = $(document.createElement('canvas')).attr({
 186                 width: this.o.width,
 187                 height: this.o.height
 188             });
 189
 190             // wraps all elements in a div
 191             // add to DOM before Canvas init is triggered
 192             this.$div = $('<div style="'
 193                 + (this.o.inline ? 'display:inline;' : '')
 194                 + 'width:' + this.o.width + 'px;height:' + this.o.height + 'px;'
 195                 + '"></div>');
 196
 197             this.$.wrap(this.$div).before(this.$c);
 198             this.$div = this.$.parent();
 199
 200             if (typeof G_vmlCanvasManager !== 'undefined') {
 201                 G_vmlCanvasManager.initElement(this.$c[0]);
 202             }
 203
 204             this.c = this.$c[0].getContext ? this.$c[0].getContext('2d') : null;
 205
 206             if (!this.c) {
 207                 throw {
 208                     name:        "CanvasNotSupportedException",
 209                     message:     "Canvas not supported. Please use excanvas on IE8.0.",
 210                     toString:    function(){return this.name + ": " + this.message}
 211                 }
 212             }
 213
 214             // hdpi support
 215             this.scale = (window.devicePixelRatio || 1) / (
 216                             this.c.webkitBackingStorePixelRatio ||
 217                             this.c.mozBackingStorePixelRatio ||
 218                             this.c.msBackingStorePixelRatio ||
 219                             this.c.oBackingStorePixelRatio ||
 220                             this.c.backingStorePixelRatio || 1
 221                          );
 222
 223             // detects relative width / height
 224             this.relativeWidth =  this.o.width % 1 !== 0
 225                                   && this.o.width.indexOf('%');
 226             this.relativeHeight = this.o.height % 1 !== 0
 227                                   && this.o.height.indexOf('%');
 228             this.relative = this.relativeWidth || this.relativeHeight;
 229
 230             // computes size and carves the component
 231             this._carve();
 232
 233             // prepares props for transaction
 234             if (this.v instanceof Object) {
 235                 this.cv = {};
 236                 this.copy(this.v, this.cv);
 237             } else {
 238                 this.cv = this.v;
 239             }
 240
 241             // binds configure event
 242             this.$
 243                 .bind("configure", cf)
 244                 .parent()
 245                 .bind("configure", cf);
 246
 247             // finalize init
 248             this._listen()
 249                 ._configure()
 250                 ._xy()
 251                 .init();
 252
 253             this.isInit = true;
 254
 255             this.$.val(this.o.format(this.v));
 256             this._draw();
 257
 258             return this;
 259         };
 260
 261         this._carve = function() {
 262             if (this.relative) {
 263                 var w = this.relativeWidth ?
 264                         this.$div.parent().width() *
 265                         parseInt(this.o.width) / 100
 266                         : this.$div.parent().width(),
 267                     h = this.relativeHeight ?
 268                         this.$div.parent().height() *
 269                         parseInt(this.o.height) / 100
 270                         : this.$div.parent().height();
 271
 272                 // apply relative
 273                 this.w = this.h = Math.min(w, h);
 274             } else {
 275                 this.w = this.o.width;
 276                 this.h = this.o.height;
 277             }
 278
 279             // finalize div
 280             this.$div.css({
 281                 'width': this.w + 'px',
 282                 'height': this.h + 'px'
 283             });
 284
 285             // finalize canvas with computed width
 286             this.$c.attr({
 287                 width: this.w,
 288                 height: this.h
 289             });
 290
 291             // scaling
 292             if (this.scale !== 1) {
 293                 this.$c[0].width = this.$c[0].width * this.scale;
 294                 this.$c[0].height = this.$c[0].height * this.scale;
 295                 this.$c.width(this.w);
 296                 this.$c.height(this.h);
 297             }
 298
 299             return this;
 300         }
 301
 302         this._draw = function () {
 303
 304             // canvas pre-rendering
 305             var d = true;
 306
 307             s.g = s.c;
 308
 309             s.clear();
 310
 311             s.dH && (d = s.dH());
 312
 313             d !== false && s.draw();
 314         };
 315
 316         this._touch = function (e) {
 317             var touchMove = function (e) {
 318                 var v = s.xy2val(
 319                             e.originalEvent.touches[s.t].pageX,
 320                             e.originalEvent.touches[s.t].pageY
 321                         );
 322
 323                 if (v == s.cv) return;
 324
 325                 if (s.cH && s.cH(v) === false) return;
 326
 327                 s.change(s._validate(v));
 328                 s._draw();
 329             };
 330
 331             // get touches index
 332             this.t = k.c.t(e);
 333
 334             // First touch
 335             touchMove(e);
 336
 337             // Touch events listeners
 338             k.c.d
 339                 .bind("touchmove.k", touchMove)
 340                 .bind(
 341                     "touchend.k",
 342                     function () {
 343                         k.c.d.unbind('touchmove.k touchend.k');
 344                         s.val(s.cv);
 345                     }
 346                 );
 347
 348             return this;
 349         };
 350
 351         this._mouse = function (e) {
 352             var mouseMove = function (e) {
 353                 var v = s.xy2val(e.pageX, e.pageY);
 354
 355                 if (v == s.cv) return;
 356
 357                 if (s.cH && (s.cH(v) === false)) return;
 358
 359                 s.change(s._validate(v));
 360                 s._draw();
 361             };
 362
 363             // First click
 364             mouseMove(e);
 365
 366             // Mouse events listeners
 367             k.c.d
 368                 .bind("mousemove.k", mouseMove)
 369                 .bind(
 370                     // Escape key cancel current change
 371                     "keyup.k",
 372                     function (e) {
 373                         if (e.keyCode === 27) {
 374                             k.c.d.unbind("mouseup.k mousemove.k keyup.k");
 375
 376                             if (s.eH && s.eH() === false)
 377                                 return;
 378
 379                             s.cancel();
 380                         }
 381                     }
 382                 )
 383                 .bind(
 384                     "mouseup.k",
 385                     function (e) {
 386                         k.c.d.unbind('mousemove.k mouseup.k keyup.k');
 387                         s.val(s.cv);
 388                     }
 389                 );
 390
 391             return this;
 392         };
 393
 394         this._xy = function () {
 395             var o = this.$c.offset();
 396             this.x = o.left;
 397             this.y = o.top;
 398
 399             return this;
 400         };
 401
 402         this._listen = function () {
 403             if (!this.o.readOnly) {
 404                 this.$c
 405                     .bind(
 406                         "mousedown",
 407                         function (e) {
 408                             e.preventDefault();
 409                             s._xy()._mouse(e);
 410                         }
 411                     )
 412                     .bind(
 413                         "touchstart",
 414                         function (e) {
 415                             e.preventDefault();
 416                             s._xy()._touch(e);
 417                         }
 418                     );
 419
 420                 this.listen();
 421             } else {
 422                 this.$.attr('readonly', 'readonly');
 423             }
 424
 425             if (this.relative) {
 426                 $(window).resize(function() {
 427                     s._carve().init();
 428                     s._draw();
 429                 });
 430             }
 431
 432             return this;
 433         };
 434
 435         this._configure = function () {
 436
 437             // Hooks
 438             if (this.o.draw) this.dH = this.o.draw;
 439             if (this.o.change) this.cH = this.o.change;
 440             if (this.o.cancel) this.eH = this.o.cancel;
 441             if (this.o.release) this.rH = this.o.release;
 442
 443             if (this.o.displayPrevious) {
 444                 this.pColor = this.h2rgba(this.o.fgColor, "0.4");
 445                 this.fgColor = this.h2rgba(this.o.fgColor, "0.6");
 446             } else {
 447                 this.fgColor = this.o.fgColor;
 448             }
 449
 450             return this;
 451         };
 452
 453         this._clear = function () {
 454             this.$c[0].width = this.$c[0].width;
 455         };
 456
 457         this._validate = function (v) {
 458             var val = (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;
 459             return Math.round(val * 100) / 100;
 460         };
 461
 462         // Abstract methods
 463         this.listen = function () {}; // on start, one time
 464         this.extend = function () {}; // each time configure triggered
 465         this.init = function () {}; // each time configure triggered
 466         this.change = function (v) {}; // on change
 467         this.val = function (v) {}; // on release
 468         this.xy2val = function (x, y) {}; //
 469         this.draw = function () {}; // on change / on release
 470         this.clear = function () { this._clear(); };
 471
 472         // Utils
 473         this.h2rgba = function (h, a) {
 474             var rgb;
 475             h = h.substring(1,7)
 476             rgb = [
 477                 parseInt(h.substring(0,2), 16),
 478                 parseInt(h.substring(2,4), 16),
 479                 parseInt(h.substring(4,6), 16)
 480             ];
 481
 482             return "rgba(" + rgb[0] + "," + rgb[1] + "," + rgb[2] + "," + a + ")";
 483         };
 484
 485         this.copy = function (f, t) {
 486             for (var i in f) {
 487                 t[i] = f[i];
 488             }
 489         };
 490     };
 491
 492
 493     /**
 494      * k.Dial
 495      */
 496     k.Dial = function () {
 497         k.o.call(this);
 498
 499         this.startAngle = null;
 500         this.xy = null;
 501         this.radius = null;
 502         this.lineWidth = null;
 503         this.cursorExt = null;
 504         this.w2 = null;
 505         this.PI2 = 2*Math.PI;
 506
 507         this.extend = function () {
 508             this.o = $.extend({
 509                 bgColor: this.$.data('bgcolor') || '#EEEEEE',
 510                 angleOffset: this.$.data('angleoffset') || 0,
 511                 angleArc: this.$.data('anglearc') || 360,
 512                 inline: true
 513             }, this.o);
 514         };
 515
 516         this.val = function (v, triggerRelease) {
 517             if (null != v) {
 518
 519                 // reverse format
 520                 v = this.o.parse(v);
 521
 522                 if (triggerRelease !== false
 523                     && v != this.v
 524                     && this.rH
 525                     && this.rH(v) === false) { return; }
 526
 527                 this.cv = this.o.stopper ? max(min(v, this.o.max), this.o.min) : v;
 528                 this.v = this.cv;
 529                 this.$.val(this.o.format(this.v));
 530                 this._draw();
 531             } else {
 532                 return this.v;
 533             }
 534         };
 535
 536         this.xy2val = function (x, y) {
 537             var a, ret;
 538
 539             a = Math.atan2(
 540                         x - (this.x + this.w2),
 541                         - (y - this.y - this.w2)
 542                     ) - this.angleOffset;
 543
 544             if (this.o.flip) {
 545                 a = this.angleArc - a - this.PI2;
 546             }
 547
 548             if (this.angleArc != this.PI2 && (a < 0) && (a > -0.5)) {
 549
 550                 // if isset angleArc option, set to min if .5 under min
 551                 a = 0;
 552             } else if (a < 0) {
 553                 a += this.PI2;
 554             }
 555
 556             ret = (a * (this.o.max - this.o.min) / this.angleArc) + this.o.min;
 557
 558             this.o.stopper && (ret = max(min(ret, this.o.max), this.o.min));
 559
 560             return ret;
 561         };
 562
 563         this.listen = function () {
 564
 565             // bind MouseWheel
 566             var s = this, mwTimerStop,
 567                 mwTimerRelease,
 568                 mw = function (e) {
 569                     e.preventDefault();
 570
 571                     var ori = e.originalEvent,
 572                         deltaX = ori.detail || ori.wheelDeltaX,
 573                         deltaY = ori.detail || ori.wheelDeltaY,
 574                         v = s._validate(s.o.parse(s.$.val()))
 575                             + (
 576                                 deltaX > 0 || deltaY > 0
 577                                 ? s.o.step
 578                                 : deltaX < 0 || deltaY < 0 ? -s.o.step : 0
 579                               );
 580
 581                     v = max(min(v, s.o.max), s.o.min);
 582
 583                     s.val(v, false);
 584
 585                     if (s.rH) {
 586                         // Handle mousewheel stop
 587                         clearTimeout(mwTimerStop);
 588                         mwTimerStop = setTimeout(function () {
 589                             s.rH(v);
 590                             mwTimerStop = null;
 591                         }, 100);
 592
 593                         // Handle mousewheel releases
 594                         if (!mwTimerRelease) {
 595                             mwTimerRelease = setTimeout(function () {
 596                                 if (mwTimerStop)
 597                                     s.rH(v);
 598                                 mwTimerRelease = null;
 599                             }, 200);
 600                         }
 601                     }
 602                 },
 603                 kval,
 604                 to,
 605                 m = 1,
 606                 kv = {
 607                     37: -s.o.step,
 608                     38: s.o.step,
 609                     39: s.o.step,
 610                     40: -s.o.step
 611                 };
 612
 613             this.$
 614                 .bind(
 615                     "keydown",
 616                     function (e) {
 617                         var kc = e.keyCode;
 618
 619                         // numpad support
 620                         if (kc >= 96 && kc <= 105) {
 621                             kc = e.keyCode = kc - 48;
 622                         }
 623
 624                         kval = parseInt(String.fromCharCode(kc));
 625
 626                         if (isNaN(kval)) {
 627                             (kc !== 13)                     // enter
 628                             && kc !== 8                     // bs
 629                             && kc !== 9                     // tab
 630                             && kc !== 189                   // -
 631                             && (kc !== 190
 632                                 || s.$.val().match(/\./))   // . allowed once
 633                             && e.preventDefault();
 634
 635                             // arrows
 636                             if ($.inArray(kc,[37,38,39,40]) > -1) {
 637                                 e.preventDefault();
 638
 639                                 var v = s.o.parse(s.$.val()) + kv[kc] * m;
 640                                 s.o.stopper && (v = max(min(v, s.o.max), s.o.min));
 641
 642                                 s.change(s._validate(v));
 643                                 s._draw();
 644
 645                                 // long time keydown speed-up
 646                                 to = window.setTimeout(function () {
 647                                     m *= 2;
 648                                 }, 30);
 649                             }
 650                         }
 651                     }
 652                 )
 653                 .bind(
 654                     "keyup",
 655                     function (e) {
 656                         if (isNaN(kval)) {
 657                             if (to) {
 658                                 window.clearTimeout(to);
 659                                 to = null;
 660                                 m = 1;
 661                                 s.val(s.$.val());
 662                             }
 663                         } else {
 664                             // kval postcond
 665                             (s.$.val() > s.o.max && s.$.val(s.o.max))
 666                             || (s.$.val() < s.o.min && s.$.val(s.o.min));
 667                         }
 668                     }
 669                 );
 670
 671             this.$c.bind("mousewheel DOMMouseScroll", mw);
 672             this.$.bind("mousewheel DOMMouseScroll", mw)
 673         };
 674
 675         this.init = function () {
 676             if (this.v < this.o.min
 677                 || this.v > this.o.max) { this.v = this.o.min; }
 678
 679             this.$.val(this.v);
 680             this.w2 = this.w / 2;
 681             this.cursorExt = this.o.cursor / 100;
 682             this.xy = this.w2 * this.scale;
 683             this.lineWidth = this.xy * this.o.thickness;
 684             this.lineCap = this.o.lineCap;
 685             this.radius = this.xy - this.lineWidth / 2;
 686
 687             this.o.angleOffset
 688             && (this.o.angleOffset = isNaN(this.o.angleOffset) ? 0 : this.o.angleOffset);
 689
 690             this.o.angleArc
 691             && (this.o.angleArc = isNaN(this.o.angleArc) ? this.PI2 : this.o.angleArc);
 692
 693             // deg to rad
 694             this.angleOffset = this.o.angleOffset * Math.PI / 180;
 695             this.angleArc = this.o.angleArc * Math.PI / 180;
 696
 697             // compute start and end angles
 698             this.startAngle = 1.5 * Math.PI + this.angleOffset;
 699             this.endAngle = 1.5 * Math.PI + this.angleOffset + this.angleArc;
 700
 701             var s = max(
 702                 String(Math.abs(this.o.max)).length,
 703                 String(Math.abs(this.o.min)).length,
 704                 2
 705             ) + 2;
 706
 707             this.o.displayInput
 708                 && this.i.css({
 709                         'width' : ((this.w / 2 + 4) >> 0) + 'px',
 710                         'height' : ((this.w / 3) >> 0) + 'px',
 711                         'position' : 'absolute',
 712                         'vertical-align' : 'middle',
 713                         'margin-top' : ((this.w / 3) >> 0) + 'px',
 714                         'margin-left' : '-' + ((this.w * 3 / 4 + 2) >> 0) + 'px',
 715                         'border' : 0,
 716                         'background' : 'none',
 717                         'font' : this.o.fontWeight + ' ' + ((this.w / s) >> 0) + 'px ' + this.o.font,
 718                         'text-align' : 'center',
 719                         'color' : this.o.inputColor || this.o.fgColor,
 720                         'padding' : '0px',
 721                         '-webkit-appearance': 'none'
 722                         }) || this.i.css({
 723                             'width': '0px',
 724                             'visibility': 'hidden'
 725                         });
 726         };
 727
 728         this.change = function (v) {
 729             this.cv = v;
 730             this.$.val(this.o.format(v));
 731         };
 732
 733         this.angle = function (v) {
 734             return (v - this.o.min) * this.angleArc / (this.o.max - this.o.min);
 735         };
 736
 737         this.arc = function (v) {
 738           var sa, ea;
 739           v = this.angle(v);
 740           if (this.o.flip) {
 741               sa = this.endAngle + 0.00001;
 742               ea = sa - v - 0.00001;
 743           } else {
 744               sa = this.startAngle - 0.00001;
 745               ea = sa + v + 0.00001;
 746           }
 747           this.o.cursor
 748               && (sa = ea - this.cursorExt)
 749               && (ea = ea + this.cursorExt);
 750
 751           return {
 752               s: sa,
 753               e: ea,
 754               d: this.o.flip && !this.o.cursor
 755           };
 756         };
 757
 758         this.draw = function () {
 759             var c = this.g,                 // context
 760                 a = this.arc(this.cv),      // Arc
 761                 pa,                         // Previous arc
 762                 r = 1;
 763
 764             c.lineWidth = this.lineWidth;
 765             c.lineCap = this.lineCap;
 766
 767             if (this.o.bgColor !== "none") {
 768                 c.beginPath();
 769                     c.strokeStyle = this.o.bgColor;
 770                     c.arc(this.xy, this.xy, this.radius, this.endAngle - 0.00001, this.startAngle + 0.00001, true);
 771                 c.stroke();
 772             }
 773
 774             if (this.o.displayPrevious) {
 775                 pa = this.arc(this.v);
 776                 c.beginPath();
 777                 c.strokeStyle = this.pColor;
 778                 c.arc(this.xy, this.xy, this.radius, pa.s, pa.e, pa.d);
 779                 c.stroke();
 780                 r = this.cv == this.v;
 781             }
 782
 783             c.beginPath();
 784             c.strokeStyle = r ? this.o.fgColor : this.fgColor ;
 785             c.arc(this.xy, this.xy, this.radius, a.s, a.e, a.d);
 786             c.stroke();
 787         };
 788
 789         this.cancel = function () {
 790             this.val(this.v);
 791         };
 792     };
 793
 794     $.fn.dial = $.fn.knob = function (o) {
 795         return this.each(
 796             function () {
 797                 var d = new k.Dial();
 798                 d.o = o;
 799                 d.$ = $(this);
 800                 d.run();
 801             }
 802         ).parent();
 803     };
 804
 805 }));