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   1  /**
   2   * jqPlot
   3   * Pure JavaScript plotting plugin using jQuery
   4   *
   5   * Version: 1.0.2
   6   * Revision: 1108
   7   *
   8   * Copyright (c) 2009-2011 Chris Leonello
   9   * jqPlot is currently available for use in all personal or commercial projects 
  10   * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL 
  11   * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can 
  12   * choose the license that best suits your project and use it accordingly. 
  13   *
  14   * Although not required, the author would appreciate an email letting him 
  15   * know of any substantial use of jqPlot.  You can reach the author at: 
  16   * chris at jqplot dot com or see http://www.jqplot.com/info.php .
  17   *
  18   * If you are feeling kind and generous, consider supporting the project by
  19   * making a donation at: http://www.jqplot.com/donate.php .
  20   *
  21   * sprintf functions contained in jqplot.sprintf.js by Ash Searle:
  22   *
  23   *     version 2007.04.27
  24   *     author Ash Searle
  25   *     http://hexmen.com/blog/2007/03/printf-sprintf/
  26   *     http://hexmen.com/js/sprintf.js
  27   *     The author (Ash Searle) has placed this code in the public domain:
  28   *     "This code is unrestricted: you are free to use it however you like."
  29   * 
  30   */
  31  (function($) {
  32      /**
  33       * Class: $.jqplot.DonutRenderer
  34       * Plugin renderer to draw a donut chart.
  35       * x values, if present, will be used as slice labels.
  36       * y values give slice size.
  37       * 
  38       * To use this renderer, you need to include the 
  39       * donut renderer plugin, for example:
  40       * 
  41       * > <script type="text/javascript" src="plugins/jqplot.donutRenderer.js"></script>
  42       * 
  43       * Properties described here are passed into the $.jqplot function
  44       * as options on the series renderer.  For example:
  45       * 
  46       * > plot2 = $.jqplot('chart2', [s1, s2], {
  47       * >     seriesDefaults: {
  48       * >         renderer:$.jqplot.DonutRenderer,
  49       * >         rendererOptions:{
  50       * >              sliceMargin: 2,
  51       * >              innerDiameter: 110,
  52       * >              startAngle: -90
  53       * >          }
  54       * >      }
  55       * > });
  56       * 
  57       * A donut plot will trigger events on the plot target
  58       * according to user interaction.  All events return the event object,
  59       * the series index, the point (slice) index, and the point data for 
  60       * the appropriate slice.
  61       * 
  62       * 'jqplotDataMouseOver' - triggered when user mouseing over a slice.
  63       * 'jqplotDataHighlight' - triggered the first time user mouses over a slice,
  64       * if highlighting is enabled.
  65       * 'jqplotDataUnhighlight' - triggered when a user moves the mouse out of
  66       * a highlighted slice.
  67       * 'jqplotDataClick' - triggered when the user clicks on a slice.
  68       * 'jqplotDataRightClick' - tiggered when the user right clicks on a slice if
  69       * the "captureRightClick" option is set to true on the plot.
  70       */
  71      $.jqplot.DonutRenderer = function(){
  72          $.jqplot.LineRenderer.call(this);
  73      };
  74      
  75      $.jqplot.DonutRenderer.prototype = new $.jqplot.LineRenderer();
  76      $.jqplot.DonutRenderer.prototype.constructor = $.jqplot.DonutRenderer;
  77      
  78      // called with scope of a series
  79      $.jqplot.DonutRenderer.prototype.init = function(options, plot) {
  80          // Group: Properties
  81          //
  82          // prop: diameter
  83          // Outer diameter of the donut, auto computed by default
  84          this.diameter = null;
  85          // prop: innerDiameter
  86          // Inner diameter of the donut, auto calculated by default.
  87          // If specified will override thickness value.
  88          this.innerDiameter = null;
  89          // prop: thickness
  90          // thickness of the donut, auto computed by default
  91          // Overridden by if innerDiameter is specified.
  92          this.thickness = null;
  93          // prop: padding
  94          // padding between the donut and plot edges, legend, etc.
  95          this.padding = 20;
  96          // prop: sliceMargin
  97          // angular spacing between donut slices in degrees.
  98          this.sliceMargin = 0;
  99          // prop: ringMargin
 100          // pixel distance between rings, or multiple series in a donut plot.
 101          // null will compute ringMargin based on sliceMargin.
 102          this.ringMargin = null;
 103          // prop: fill
 104          // true or false, wether to fil the slices.
 105          this.fill = true;
 106          // prop: shadowOffset
 107          // offset of the shadow from the slice and offset of 
 108          // each succesive stroke of the shadow from the last.
 109          this.shadowOffset = 2;
 110          // prop: shadowAlpha
 111          // transparency of the shadow (0 = transparent, 1 = opaque)
 112          this.shadowAlpha = 0.07;
 113          // prop: shadowDepth
 114          // number of strokes to apply to the shadow, 
 115          // each stroke offset shadowOffset from the last.
 116          this.shadowDepth = 5;
 117          // prop: highlightMouseOver
 118          // True to highlight slice when moused over.
 119          // This must be false to enable highlightMouseDown to highlight when clicking on a slice.
 120          this.highlightMouseOver = true;
 121          // prop: highlightMouseDown
 122          // True to highlight when a mouse button is pressed over a slice.
 123          // This will be disabled if highlightMouseOver is true.
 124          this.highlightMouseDown = false;
 125          // prop: highlightColors
 126          // an array of colors to use when highlighting a slice.
 127          this.highlightColors = [];
 128          // prop: dataLabels
 129          // Either 'label', 'value', 'percent' or an array of labels to place on the pie slices.
 130          // Defaults to percentage of each pie slice.
 131          this.dataLabels = 'percent';
 132          // prop: showDataLabels
 133          // true to show data labels on slices.
 134          this.showDataLabels = false;
 135          // prop: dataLabelFormatString
 136          // Format string for data labels.  If none, '%s' is used for "label" and for arrays, '%d' for value and '%d%%' for percentage.
 137          this.dataLabelFormatString = null;
 138          // prop: dataLabelThreshold
 139          // Threshhold in percentage (0 - 100) of pie area, below which no label will be displayed.
 140          // This applies to all label types, not just to percentage labels.
 141          this.dataLabelThreshold = 3;
 142          // prop: dataLabelPositionFactor
 143          // A Multiplier (0-1) of the pie radius which controls position of label on slice.
 144          // Increasing will slide label toward edge of pie, decreasing will slide label toward center of pie.
 145          this.dataLabelPositionFactor = 0.4;
 146          // prop: dataLabelNudge
 147          // Number of pixels to slide the label away from (+) or toward (-) the center of the pie.
 148          this.dataLabelNudge = 0;
 149          // prop: startAngle
 150          // Angle to start drawing donut in degrees.  
 151          // According to orientation of canvas coordinate system:
 152          // 0 = on the positive x axis
 153          // -90 = on the positive y axis.
 154          // 90 = on the negaive y axis.
 155          // 180 or - 180 = on the negative x axis.
 156          this.startAngle = 0;
 157          this.tickRenderer = $.jqplot.DonutTickRenderer;
 158          // Used as check for conditions where donut shouldn't be drawn.
 159          this._drawData = true;
 160          this._type = 'donut';
 161          
 162          // if user has passed in highlightMouseDown option and not set highlightMouseOver, disable highlightMouseOver
 163          if (options.highlightMouseDown && options.highlightMouseOver == null) {
 164              options.highlightMouseOver = false;
 165          }
 166          
 167          $.extend(true, this, options);
 168          if (this.diameter != null) {
 169              this.diameter = this.diameter - this.sliceMargin;
 170          }
 171          this._diameter = null;
 172          this._innerDiameter = null;
 173          this._radius = null;
 174          this._innerRadius = null;
 175          this._thickness = null;
 176          // references to the previous series in the plot to properly calculate diameters
 177          // and thicknesses of nested rings.
 178          this._previousSeries = [];
 179          this._numberSeries = 1;
 180          // array of [start,end] angles arrays, one for each slice.  In radians.
 181          this._sliceAngles = [];
 182          // index of the currenty highlighted point, if any
 183          this._highlightedPoint = null;
 184          
 185          // set highlight colors if none provided
 186          if (this.highlightColors.length == 0) {
 187              for (var i=0; i<this.seriesColors.length; i++){
 188                  var rgba = $.jqplot.getColorComponents(this.seriesColors[i]);
 189                  var newrgb = [rgba[0], rgba[1], rgba[2]];
 190                  var sum = newrgb[0] + newrgb[1] + newrgb[2];
 191                  for (var j=0; j<3; j++) {
 192                      // when darkening, lowest color component can be is 60.
 193                      newrgb[j] = (sum > 570) ?  newrgb[j] * 0.8 : newrgb[j] + 0.3 * (255 - newrgb[j]);
 194                      newrgb[j] = parseInt(newrgb[j], 10);
 195                  }
 196                  this.highlightColors.push('rgb('+newrgb[0]+','+newrgb[1]+','+newrgb[2]+')');
 197              }
 198          }
 199          
 200          plot.postParseOptionsHooks.addOnce(postParseOptions);
 201          plot.postInitHooks.addOnce(postInit);
 202          plot.eventListenerHooks.addOnce('jqplotMouseMove', handleMove);
 203          plot.eventListenerHooks.addOnce('jqplotMouseDown', handleMouseDown);
 204          plot.eventListenerHooks.addOnce('jqplotMouseUp', handleMouseUp);
 205          plot.eventListenerHooks.addOnce('jqplotClick', handleClick);
 206          plot.eventListenerHooks.addOnce('jqplotRightClick', handleRightClick);
 207          plot.postDrawHooks.addOnce(postPlotDraw);
 208          
 209          
 210      };
 211      
 212      $.jqplot.DonutRenderer.prototype.setGridData = function(plot) {
 213          // set gridData property.  This will hold angle in radians of each data point.
 214          var stack = [];
 215          var td = [];
 216          var sa = this.startAngle/180*Math.PI;
 217          var tot = 0;
 218          // don't know if we have any valid data yet, so set plot to not draw.
 219          this._drawData = false;
 220          for (var i=0; i<this.data.length; i++){
 221              if (this.data[i][1] != 0) {
 222                  // we have data, O.K. to draw.
 223                  this._drawData = true;
 224              }
 225              stack.push(this.data[i][1]);
 226              td.push([this.data[i][0]]);
 227              if (i>0) {
 228                  stack[i] += stack[i-1];
 229              }
 230              tot += this.data[i][1];
 231          }
 232          var fact = Math.PI*2/stack[stack.length - 1];
 233          
 234          for (var i=0; i<stack.length; i++) {
 235              td[i][1] = stack[i] * fact;
 236              td[i][2] = this.data[i][1]/tot;
 237          }
 238          this.gridData = td;
 239      };
 240      
 241      $.jqplot.DonutRenderer.prototype.makeGridData = function(data, plot) {
 242          var stack = [];
 243          var td = [];
 244          var tot = 0;
 245          var sa = this.startAngle/180*Math.PI;
 246          // don't know if we have any valid data yet, so set plot to not draw.
 247          this._drawData = false;
 248          for (var i=0; i<data.length; i++){
 249              if (this.data[i][1] != 0) {
 250                  // we have data, O.K. to draw.
 251                  this._drawData = true;
 252              }
 253              stack.push(data[i][1]);
 254              td.push([data[i][0]]);
 255              if (i>0) {
 256                  stack[i] += stack[i-1];
 257              }
 258              tot += data[i][1];
 259          }
 260          var fact = Math.PI*2/stack[stack.length - 1];
 261          
 262          for (var i=0; i<stack.length; i++) {
 263              td[i][1] = stack[i] * fact;
 264              td[i][2] = data[i][1]/tot;
 265          }
 266          return td;
 267      };
 268      
 269      $.jqplot.DonutRenderer.prototype.drawSlice = function (ctx, ang1, ang2, color, isShadow) {
 270          var r = this._diameter / 2;
 271          var ri = r - this._thickness;
 272          var fill = this.fill;
 273          // var lineWidth = this.lineWidth;
 274          ctx.save();
 275          ctx.translate(this._center[0], this._center[1]);
 276          // ctx.translate(this.sliceMargin*Math.cos((ang1+ang2)/2), this.sliceMargin*Math.sin((ang1+ang2)/2));
 277          
 278          if (isShadow) {
 279              for (var i=0; i<this.shadowDepth; i++) {
 280                  ctx.save();
 281                  ctx.translate(this.shadowOffset*Math.cos(this.shadowAngle/180*Math.PI), this.shadowOffset*Math.sin(this.shadowAngle/180*Math.PI));
 282                  doDraw();
 283              }
 284          }
 285          
 286          else {
 287              doDraw();
 288          }
 289          
 290          function doDraw () {
 291              // Fix for IE and Chrome that can't seem to draw circles correctly.
 292              // ang2 should always be <= 2 pi since that is the way the data is converted.
 293               if (ang2 > 6.282 + this.startAngle) {
 294                  ang2 = 6.282 + this.startAngle;
 295                  if (ang1 > ang2) {
 296                      ang1 = 6.281 + this.startAngle;
 297                  }
 298              }
 299              // Fix for IE, where it can't seem to handle 0 degree angles.  Also avoids
 300              // ugly line on unfilled donuts.
 301              if (ang1 >= ang2) {
 302                  return;
 303              }
 304              ctx.beginPath();  
 305              ctx.fillStyle = color;
 306              ctx.strokeStyle = color;
 307              // ctx.lineWidth = lineWidth;
 308              ctx.arc(0, 0, r, ang1, ang2, false);
 309              ctx.lineTo(ri*Math.cos(ang2), ri*Math.sin(ang2));
 310              ctx.arc(0,0, ri, ang2, ang1, true);
 311              ctx.closePath();
 312              if (fill) {
 313                  ctx.fill();
 314              }
 315              else {
 316                  ctx.stroke();
 317              }
 318          }
 319          
 320          if (isShadow) {
 321              for (var i=0; i<this.shadowDepth; i++) {
 322                  ctx.restore();
 323              }
 324          }
 325          
 326          ctx.restore();
 327      };
 328      
 329      // called with scope of series
 330      $.jqplot.DonutRenderer.prototype.draw = function (ctx, gd, options, plot) {
 331          var i;
 332          var opts = (options != undefined) ? options : {};
 333          // offset and direction of offset due to legend placement
 334          var offx = 0;
 335          var offy = 0;
 336          var trans = 1;
 337          // var colorGenerator = new this.colorGenerator(this.seriesColors);
 338          if (options.legendInfo && options.legendInfo.placement == 'insideGrid') {
 339              var li = options.legendInfo;
 340              switch (li.location) {
 341                  case 'nw':
 342                      offx = li.width + li.xoffset;
 343                      break;
 344                  case 'w':
 345                      offx = li.width + li.xoffset;
 346                      break;
 347                  case 'sw':
 348                      offx = li.width + li.xoffset;
 349                      break;
 350                  case 'ne':
 351                      offx = li.width + li.xoffset;
 352                      trans = -1;
 353                      break;
 354                  case 'e':
 355                      offx = li.width + li.xoffset;
 356                      trans = -1;
 357                      break;
 358                  case 'se':
 359                      offx = li.width + li.xoffset;
 360                      trans = -1;
 361                      break;
 362                  case 'n':
 363                      offy = li.height + li.yoffset;
 364                      break;
 365                  case 's':
 366                      offy = li.height + li.yoffset;
 367                      trans = -1;
 368                      break;
 369                  default:
 370                      break;
 371              }
 372          }
 373          
 374          var shadow = (opts.shadow != undefined) ? opts.shadow : this.shadow;
 375          var showLine = (opts.showLine != undefined) ? opts.showLine : this.showLine;
 376          var fill = (opts.fill != undefined) ? opts.fill : this.fill;
 377          var cw = ctx.canvas.width;
 378          var ch = ctx.canvas.height;
 379          var w = cw - offx - 2 * this.padding;
 380          var h = ch - offy - 2 * this.padding;
 381          var mindim = Math.min(w,h);
 382          var d = mindim;
 383          var ringmargin =  (this.ringMargin == null) ? this.sliceMargin * 2.0 : this.ringMargin;
 384          
 385          for (var i=0; i<this._previousSeries.length; i++) {
 386              d -= 2.0 * this._previousSeries[i]._thickness + 2.0 * ringmargin;
 387          }
 388          this._diameter = this.diameter || d;
 389          if (this.innerDiameter != null) {
 390              var od = (this._numberSeries > 1 && this.index > 0) ? this._previousSeries[0]._diameter : this._diameter;
 391              this._thickness = this.thickness || (od - this.innerDiameter - 2.0*ringmargin*this._numberSeries) / this._numberSeries/2.0;
 392          }
 393          else {
 394              this._thickness = this.thickness || mindim / 2 / (this._numberSeries + 1) * 0.85;
 395          }
 396  
 397          var r = this._radius = this._diameter/2;
 398          this._innerRadius = this._radius - this._thickness;
 399          var sa = this.startAngle / 180 * Math.PI;
 400          this._center = [(cw - trans * offx)/2 + trans * offx, (ch - trans*offy)/2 + trans * offy];
 401          
 402          if (this.shadow) {
 403              var shadowColor = 'rgba(0,0,0,'+this.shadowAlpha+')';
 404              for (var i=0; i<gd.length; i++) {
 405                  var ang1 = (i == 0) ? sa : gd[i-1][1] + sa;
 406                  // Adjust ang1 and ang2 for sliceMargin
 407                  ang1 += this.sliceMargin/180*Math.PI;
 408                  this.renderer.drawSlice.call (this, ctx, ang1, gd[i][1]+sa, shadowColor, true);
 409              }
 410              
 411          }
 412          for (var i=0; i<gd.length; i++) {
 413              var ang1 = (i == 0) ? sa : gd[i-1][1] + sa;
 414              // Adjust ang1 and ang2 for sliceMargin
 415              ang1 += this.sliceMargin/180*Math.PI;
 416              var ang2 = gd[i][1] + sa;
 417              this._sliceAngles.push([ang1, ang2]);
 418              this.renderer.drawSlice.call (this, ctx, ang1, ang2, this.seriesColors[i], false);
 419              
 420              if (this.showDataLabels && gd[i][2]*100 >= this.dataLabelThreshold) {
 421                  var fstr, avgang = (ang1+ang2)/2, label;
 422                  
 423                  if (this.dataLabels == 'label') {
 424                      fstr = this.dataLabelFormatString || '%s';
 425                      label = $.jqplot.sprintf(fstr, gd[i][0]);
 426                  }
 427                  else if (this.dataLabels == 'value') {
 428                      fstr = this.dataLabelFormatString || '%d';
 429                      label = $.jqplot.sprintf(fstr, this.data[i][1]);
 430                  }
 431                  else if (this.dataLabels == 'percent') {
 432                      fstr = this.dataLabelFormatString || '%d%%';
 433                      label = $.jqplot.sprintf(fstr, gd[i][2]*100);
 434                  }
 435                  else if (this.dataLabels.constructor == Array) {
 436                      fstr = this.dataLabelFormatString || '%s';
 437                      label = $.jqplot.sprintf(fstr, this.dataLabels[i]);
 438                  }
 439                  
 440                  var fact = this._innerRadius + this._thickness * this.dataLabelPositionFactor + this.sliceMargin + this.dataLabelNudge;
 441                  
 442                  var x = this._center[0] + Math.cos(avgang) * fact + this.canvas._offsets.left;
 443                  var y = this._center[1] + Math.sin(avgang) * fact + this.canvas._offsets.top;
 444                  
 445                  var labelelem = $('<span class="jqplot-donut-series jqplot-data-label" style="position:absolute;">' + label + '</span>').insertBefore(plot.eventCanvas._elem);
 446                  x -= labelelem.width()/2;
 447                  y -= labelelem.height()/2;
 448                  x = Math.round(x);
 449                  y = Math.round(y);
 450                  labelelem.css({left: x, top: y});
 451              }
 452          }
 453                 
 454      };
 455      
 456      $.jqplot.DonutAxisRenderer = function() {
 457          $.jqplot.LinearAxisRenderer.call(this);
 458      };
 459      
 460      $.jqplot.DonutAxisRenderer.prototype = new $.jqplot.LinearAxisRenderer();
 461      $.jqplot.DonutAxisRenderer.prototype.constructor = $.jqplot.DonutAxisRenderer;
 462          
 463      
 464      // There are no traditional axes on a donut chart.  We just need to provide
 465      // dummy objects with properties so the plot will render.
 466      // called with scope of axis object.
 467      $.jqplot.DonutAxisRenderer.prototype.init = function(options){
 468          //
 469          this.tickRenderer = $.jqplot.DonutTickRenderer;
 470          $.extend(true, this, options);
 471          // I don't think I'm going to need _dataBounds here.
 472          // have to go Axis scaling in a way to fit chart onto plot area
 473          // and provide u2p and p2u functionality for mouse cursor, etc.
 474          // for convienence set _dataBounds to 0 and 100 and
 475          // set min/max to 0 and 100.
 476          this._dataBounds = {min:0, max:100};
 477          this.min = 0;
 478          this.max = 100;
 479          this.showTicks = false;
 480          this.ticks = [];
 481          this.showMark = false;
 482          this.show = false; 
 483      };
 484      
 485      
 486      
 487      
 488      $.jqplot.DonutLegendRenderer = function(){
 489          $.jqplot.TableLegendRenderer.call(this);
 490      };
 491      
 492      $.jqplot.DonutLegendRenderer.prototype = new $.jqplot.TableLegendRenderer();
 493      $.jqplot.DonutLegendRenderer.prototype.constructor = $.jqplot.DonutLegendRenderer;
 494      
 495      /**
 496       * Class: $.jqplot.DonutLegendRenderer
 497       * Legend Renderer specific to donut plots.  Set by default
 498       * when user creates a donut plot.
 499       */
 500      $.jqplot.DonutLegendRenderer.prototype.init = function(options) {
 501          // Group: Properties
 502          //
 503          // prop: numberRows
 504          // Maximum number of rows in the legend.  0 or null for unlimited.
 505          this.numberRows = null;
 506          // prop: numberColumns
 507          // Maximum number of columns in the legend.  0 or null for unlimited.
 508          this.numberColumns = null;
 509          $.extend(true, this, options);
 510      };
 511      
 512      // called with context of legend
 513      $.jqplot.DonutLegendRenderer.prototype.draw = function() {
 514          var legend = this;
 515          if (this.show) {
 516              var series = this._series;
 517              var ss = 'position:absolute;';
 518              ss += (this.background) ? 'background:'+this.background+';' : '';
 519              ss += (this.border) ? 'border:'+this.border+';' : '';
 520              ss += (this.fontSize) ? 'font-size:'+this.fontSize+';' : '';
 521              ss += (this.fontFamily) ? 'font-family:'+this.fontFamily+';' : '';
 522              ss += (this.textColor) ? 'color:'+this.textColor+';' : '';
 523              ss += (this.marginTop != null) ? 'margin-top:'+this.marginTop+';' : '';
 524              ss += (this.marginBottom != null) ? 'margin-bottom:'+this.marginBottom+';' : '';
 525              ss += (this.marginLeft != null) ? 'margin-left:'+this.marginLeft+';' : '';
 526              ss += (this.marginRight != null) ? 'margin-right:'+this.marginRight+';' : '';
 527              this._elem = $('<table class="jqplot-table-legend" style="'+ss+'"></table>');
 528              // Donut charts legends don't go by number of series, but by number of data points
 529              // in the series.  Refactor things here for that.
 530              
 531              var pad = false, 
 532                  reverse = false,
 533                  nr, nc;
 534              var s = series[0];
 535              var colorGenerator = new $.jqplot.ColorGenerator(s.seriesColors);
 536              
 537              if (s.show) {
 538                  var pd = s.data;
 539                  if (this.numberRows) {
 540                      nr = this.numberRows;
 541                      if (!this.numberColumns){
 542                          nc = Math.ceil(pd.length/nr);
 543                      }
 544                      else{
 545                          nc = this.numberColumns;
 546                      }
 547                  }
 548                  else if (this.numberColumns) {
 549                      nc = this.numberColumns;
 550                      nr = Math.ceil(pd.length/this.numberColumns);
 551                  }
 552                  else {
 553                      nr = pd.length;
 554                      nc = 1;
 555                  }
 556                  
 557                  var i, j, tr, td1, td2, lt, rs, color;
 558                  var idx = 0;    
 559                  
 560                  for (i=0; i<nr; i++) {
 561                      if (reverse){
 562                          tr = $('<tr class="jqplot-table-legend"></tr>').prependTo(this._elem);
 563                      }
 564                      else{
 565                          tr = $('<tr class="jqplot-table-legend"></tr>').appendTo(this._elem);
 566                      }
 567                      for (j=0; j<nc; j++) {
 568                          if (idx < pd.length){
 569                              lt = this.labels[idx] || pd[idx][0].toString();
 570                              color = colorGenerator.next();
 571                              if (!reverse){
 572                                  if (i>0){
 573                                      pad = true;
 574                                  }
 575                                  else{
 576                                      pad = false;
 577                                  }
 578                              }
 579                              else{
 580                                  if (i == nr -1){
 581                                      pad = false;
 582                                  }
 583                                  else{
 584                                      pad = true;
 585                                  }
 586                              }
 587                              rs = (pad) ? this.rowSpacing : '0';
 588                  
 589                              td1 = $('<td class="jqplot-table-legend" style="text-align:center;padding-top:'+rs+';">'+
 590                                  '<div><div class="jqplot-table-legend-swatch" style="border-color:'+color+';"></div>'+
 591                                  '</div></td>');
 592                              td2 = $('<td class="jqplot-table-legend" style="padding-top:'+rs+';"></td>');
 593                              if (this.escapeHtml){
 594                                  td2.text(lt);
 595                              }
 596                              else {
 597                                  td2.html(lt);
 598                              }
 599                              if (reverse) {
 600                                  td2.prependTo(tr);
 601                                  td1.prependTo(tr);
 602                              }
 603                              else {
 604                                  td1.appendTo(tr);
 605                                  td2.appendTo(tr);
 606                              }
 607                              pad = true;
 608                          }
 609                          idx++;
 610                      }   
 611                  }
 612              }
 613          }
 614          return this._elem;                
 615      };
 616      
 617      // setup default renderers for axes and legend so user doesn't have to
 618      // called with scope of plot
 619      function preInit(target, data, options) {
 620          options = options || {};
 621          options.axesDefaults = options.axesDefaults || {};
 622          options.legend = options.legend || {};
 623          options.seriesDefaults = options.seriesDefaults || {};
 624          // only set these if there is a donut series
 625          var setopts = false;
 626          if (options.seriesDefaults.renderer == $.jqplot.DonutRenderer) {
 627              setopts = true;
 628          }
 629          else if (options.series) {
 630              for (var i=0; i < options.series.length; i++) {
 631                  if (options.series[i].renderer == $.jqplot.DonutRenderer) {
 632                      setopts = true;
 633                  }
 634              }
 635          }
 636          
 637          if (setopts) {
 638              options.axesDefaults.renderer = $.jqplot.DonutAxisRenderer;
 639              options.legend.renderer = $.jqplot.DonutLegendRenderer;
 640              options.legend.preDraw = true;
 641              options.seriesDefaults.pointLabels = {show: false};
 642          }
 643      }
 644      
 645      // called with scope of plot.
 646      function postInit(target, data, options) {
 647          // if multiple series, add a reference to the previous one so that
 648          // donut rings can nest.
 649          for (var i=1; i<this.series.length; i++) {
 650              if (!this.series[i]._previousSeries.length){
 651                  for (var j=0; j<i; j++) {
 652                      if (this.series[i].renderer.constructor == $.jqplot.DonutRenderer && this.series[j].renderer.constructor == $.jqplot.DonutRenderer) {
 653                          this.series[i]._previousSeries.push(this.series[j]);
 654                      }
 655                  }
 656              }
 657          }
 658          for (i=0; i<this.series.length; i++) {
 659              if (this.series[i].renderer.constructor == $.jqplot.DonutRenderer) {
 660                  this.series[i]._numberSeries = this.series.length;
 661                  // don't allow mouseover and mousedown at same time.
 662                  if (this.series[i].highlightMouseOver) {
 663                      this.series[i].highlightMouseDown = false;
 664                  }
 665              }
 666          }
 667      }
 668      
 669      var postParseOptionsRun = false;
 670      // called with scope of plot
 671      function postParseOptions(options) {
 672          for (var i=0; i<this.series.length; i++) {
 673              this.series[i].seriesColors = this.seriesColors;
 674              this.series[i].colorGenerator = $.jqplot.colorGenerator;
 675          }
 676      }
 677      
 678      function highlight (plot, sidx, pidx) {
 679          var s = plot.series[sidx];
 680          var canvas = plot.plugins.donutRenderer.highlightCanvas;
 681          canvas._ctx.clearRect(0,0,canvas._ctx.canvas.width, canvas._ctx.canvas.height);
 682          s._highlightedPoint = pidx;
 683          plot.plugins.donutRenderer.highlightedSeriesIndex = sidx;
 684          s.renderer.drawSlice.call(s, canvas._ctx, s._sliceAngles[pidx][0], s._sliceAngles[pidx][1], s.highlightColors[pidx], false);
 685      }
 686      
 687      function unhighlight (plot) {
 688          var canvas = plot.plugins.donutRenderer.highlightCanvas;
 689          canvas._ctx.clearRect(0,0, canvas._ctx.canvas.width, canvas._ctx.canvas.height);
 690          for (var i=0; i<plot.series.length; i++) {
 691              plot.series[i]._highlightedPoint = null;
 692          }
 693          plot.plugins.donutRenderer.highlightedSeriesIndex = null;
 694          plot.target.trigger('jqplotDataUnhighlight');
 695      }
 696   
 697      function handleMove(ev, gridpos, datapos, neighbor, plot) {
 698          if (neighbor) {
 699              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 700              var evt1 = jQuery.Event('jqplotDataMouseOver');
 701              evt1.pageX = ev.pageX;
 702              evt1.pageY = ev.pageY;
 703              plot.target.trigger(evt1, ins);
 704              if (plot.series[ins[0]].highlightMouseOver && !(ins[0] == plot.plugins.donutRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {
 705                  var evt = jQuery.Event('jqplotDataHighlight');
 706          evt.which = ev.which;
 707                  evt.pageX = ev.pageX;
 708                  evt.pageY = ev.pageY;
 709                  plot.target.trigger(evt, ins);
 710                  highlight (plot, ins[0], ins[1]);
 711              }
 712          }
 713          else if (neighbor == null) {
 714              unhighlight (plot);
 715          }
 716      } 
 717      
 718      function handleMouseDown(ev, gridpos, datapos, neighbor, plot) {
 719          if (neighbor) {
 720              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 721              if (plot.series[ins[0]].highlightMouseDown && !(ins[0] == plot.plugins.donutRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {
 722                  var evt = jQuery.Event('jqplotDataHighlight');
 723          evt.which = ev.which;
 724                  evt.pageX = ev.pageX;
 725                  evt.pageY = ev.pageY;
 726                  plot.target.trigger(evt, ins);
 727                  highlight (plot, ins[0], ins[1]);
 728              }
 729          }
 730          else if (neighbor == null) {
 731              unhighlight (plot);
 732          }
 733      }
 734      
 735      function handleMouseUp(ev, gridpos, datapos, neighbor, plot) {
 736          var idx = plot.plugins.donutRenderer.highlightedSeriesIndex;
 737          if (idx != null && plot.series[idx].highlightMouseDown) {
 738              unhighlight(plot);
 739          }
 740      }
 741      
 742      function handleClick(ev, gridpos, datapos, neighbor, plot) {
 743          if (neighbor) {
 744              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 745              var evt = jQuery.Event('jqplotDataClick');
 746          evt.which = ev.which;
 747              evt.pageX = ev.pageX;
 748              evt.pageY = ev.pageY;
 749              plot.target.trigger(evt, ins);
 750          }
 751      }
 752      
 753      function handleRightClick(ev, gridpos, datapos, neighbor, plot) {
 754          if (neighbor) {
 755              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 756              var idx = plot.plugins.donutRenderer.highlightedSeriesIndex;
 757              if (idx != null && plot.series[idx].highlightMouseDown) {
 758                  unhighlight(plot);
 759              }
 760              var evt = jQuery.Event('jqplotDataRightClick');
 761          evt.which = ev.which;
 762              evt.pageX = ev.pageX;
 763              evt.pageY = ev.pageY;
 764              plot.target.trigger(evt, ins);
 765          }
 766      }    
 767      
 768      // called within context of plot
 769      // create a canvas which we can draw on.
 770      // insert it before the eventCanvas, so eventCanvas will still capture events.
 771      function postPlotDraw() {
 772          // Memory Leaks patch    
 773          if (this.plugins.donutRenderer && this.plugins.donutRenderer.highlightCanvas) {
 774              this.plugins.donutRenderer.highlightCanvas.resetCanvas();
 775              this.plugins.donutRenderer.highlightCanvas = null;
 776          }
 777  
 778          this.plugins.donutRenderer = {highlightedSeriesIndex:null};
 779          this.plugins.donutRenderer.highlightCanvas = new $.jqplot.GenericCanvas();
 780          // do we have any data labels?  if so, put highlight canvas before those
 781          // Fix for broken jquery :first selector with canvas (VML) elements.
 782          var labels = $(this.targetId+' .jqplot-data-label');
 783          if (labels.length) {
 784              $(labels[0]).before(this.plugins.donutRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-donutRenderer-highlight-canvas', this._plotDimensions, this));
 785          }
 786          // else put highlight canvas before event canvas.
 787          else {
 788              this.eventCanvas._elem.before(this.plugins.donutRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-donutRenderer-highlight-canvas', this._plotDimensions, this));
 789          }
 790          var hctx = this.plugins.donutRenderer.highlightCanvas.setContext();
 791          this.eventCanvas._elem.bind('mouseleave', {plot:this}, function (ev) { unhighlight(ev.data.plot); });
 792      }
 793      
 794      $.jqplot.preInitHooks.push(preInit);
 795      
 796      $.jqplot.DonutTickRenderer = function() {
 797          $.jqplot.AxisTickRenderer.call(this);
 798      };
 799      
 800      $.jqplot.DonutTickRenderer.prototype = new $.jqplot.AxisTickRenderer();
 801      $.jqplot.DonutTickRenderer.prototype.constructor = $.jqplot.DonutTickRenderer;
 802      
 803  })(jQuery);
 804      
 805