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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.PieRenderer
  34       * Plugin renderer to draw a pie 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       * pie renderer plugin, for example:
  40       * 
  41       * > <script type="text/javascript" src="plugins/jqplot.pieRenderer.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.PieRenderer,
  49       * >         rendererOptions:{
  50       * >              sliceMargin: 2,
  51       * >              startAngle: -90
  52       * >          }
  53       * >      }
  54       * > });
  55       * 
  56       * A pie plot will trigger events on the plot target
  57       * according to user interaction.  All events return the event object,
  58       * the series index, the point (slice) index, and the point data for 
  59       * the appropriate slice.
  60       * 
  61       * 'jqplotDataMouseOver' - triggered when user mouseing over a slice.
  62       * 'jqplotDataHighlight' - triggered the first time user mouses over a slice,
  63       * if highlighting is enabled.
  64       * 'jqplotDataUnhighlight' - triggered when a user moves the mouse out of
  65       * a highlighted slice.
  66       * 'jqplotDataClick' - triggered when the user clicks on a slice.
  67       * 'jqplotDataRightClick' - tiggered when the user right clicks on a slice if
  68       * the "captureRightClick" option is set to true on the plot.
  69       */
  70      $.jqplot.PieRenderer = function(){
  71          $.jqplot.LineRenderer.call(this);
  72      };
  73      
  74      $.jqplot.PieRenderer.prototype = new $.jqplot.LineRenderer();
  75      $.jqplot.PieRenderer.prototype.constructor = $.jqplot.PieRenderer;
  76      
  77      // called with scope of a series
  78      $.jqplot.PieRenderer.prototype.init = function(options, plot) {
  79          // Group: Properties
  80          //
  81          // prop: diameter
  82          // Outer diameter of the pie, auto computed by default
  83          this.diameter = null;
  84          // prop: padding
  85          // padding between the pie and plot edges, legend, etc.
  86          this.padding = 20;
  87          // prop: sliceMargin
  88          // angular spacing between pie slices in degrees.
  89          this.sliceMargin = 0;
  90          // prop: fill
  91          // true or false, wether to fil the slices.
  92          this.fill = true;
  93          // prop: shadowOffset
  94          // offset of the shadow from the slice and offset of 
  95          // each succesive stroke of the shadow from the last.
  96          this.shadowOffset = 2;
  97          // prop: shadowAlpha
  98          // transparency of the shadow (0 = transparent, 1 = opaque)
  99          this.shadowAlpha = 0.07;
 100          // prop: shadowDepth
 101          // number of strokes to apply to the shadow, 
 102          // each stroke offset shadowOffset from the last.
 103          this.shadowDepth = 5;
 104          // prop: highlightMouseOver
 105          // True to highlight slice when moused over.
 106          // This must be false to enable highlightMouseDown to highlight when clicking on a slice.
 107          this.highlightMouseOver = true;
 108          // prop: highlightMouseDown
 109          // True to highlight when a mouse button is pressed over a slice.
 110          // This will be disabled if highlightMouseOver is true.
 111          this.highlightMouseDown = false;
 112          // prop: highlightColors
 113          // an array of colors to use when highlighting a slice.
 114          this.highlightColors = [];
 115          // prop: dataLabels
 116          // Either 'label', 'value', 'percent' or an array of labels to place on the pie slices.
 117          // Defaults to percentage of each pie slice.
 118          this.dataLabels = 'percent';
 119          // prop: showDataLabels
 120          // true to show data labels on slices.
 121          this.showDataLabels = false;
 122          // prop: dataLabelFormatString
 123          // Format string for data labels.  If none, '%s' is used for "label" and for arrays, '%d' for value and '%d%%' for percentage.
 124          this.dataLabelFormatString = null;
 125          // prop: dataLabelThreshold
 126          // Threshhold in percentage (0-100) of pie area, below which no label will be displayed.
 127          // This applies to all label types, not just to percentage labels.
 128          this.dataLabelThreshold = 3;
 129          // prop: dataLabelPositionFactor
 130          // A Multiplier (0-1) of the pie radius which controls position of label on slice.
 131          // Increasing will slide label toward edge of pie, decreasing will slide label toward center of pie.
 132          this.dataLabelPositionFactor = 0.52;
 133          // prop: dataLabelNudge
 134          // Number of pixels to slide the label away from (+) or toward (-) the center of the pie.
 135          this.dataLabelNudge = 2;
 136          // prop: dataLabelCenterOn
 137          // True to center the data label at its position.
 138          // False to set the inside facing edge of the label at its position.
 139          this.dataLabelCenterOn = true;
 140          // prop: startAngle
 141          // Angle to start drawing pie in degrees.  
 142          // According to orientation of canvas coordinate system:
 143          // 0 = on the positive x axis
 144          // -90 = on the positive y axis.
 145          // 90 = on the negaive y axis.
 146          // 180 or - 180 = on the negative x axis.
 147          this.startAngle = 0;
 148          this.tickRenderer = $.jqplot.PieTickRenderer;
 149          // Used as check for conditions where pie shouldn't be drawn.
 150          this._drawData = true;
 151          this._type = 'pie';
 152          
 153          // if user has passed in highlightMouseDown option and not set highlightMouseOver, disable highlightMouseOver
 154          if (options.highlightMouseDown && options.highlightMouseOver == null) {
 155              options.highlightMouseOver = false;
 156          }
 157          
 158          $.extend(true, this, options);
 159  
 160          if (this.sliceMargin < 0) {
 161              this.sliceMargin = 0;
 162          }
 163  
 164          this._diameter = null;
 165          this._radius = null;
 166          // array of [start,end] angles arrays, one for each slice.  In radians.
 167          this._sliceAngles = [];
 168          // index of the currenty highlighted point, if any
 169          this._highlightedPoint = null;
 170          
 171          // set highlight colors if none provided
 172          if (this.highlightColors.length == 0) {
 173              for (var i=0; i<this.seriesColors.length; i++){
 174                  var rgba = $.jqplot.getColorComponents(this.seriesColors[i]);
 175                  var newrgb = [rgba[0], rgba[1], rgba[2]];
 176                  var sum = newrgb[0] + newrgb[1] + newrgb[2];
 177                  for (var j=0; j<3; j++) {
 178                      // when darkening, lowest color component can be is 60.
 179                      newrgb[j] = (sum > 570) ?  newrgb[j] * 0.8 : newrgb[j] + 0.3 * (255 - newrgb[j]);
 180                      newrgb[j] = parseInt(newrgb[j], 10);
 181                  }
 182                  this.highlightColors.push('rgb('+newrgb[0]+','+newrgb[1]+','+newrgb[2]+')');
 183              }
 184          }
 185          
 186          this.highlightColorGenerator = new $.jqplot.ColorGenerator(this.highlightColors);
 187          
 188          plot.postParseOptionsHooks.addOnce(postParseOptions);
 189          plot.postInitHooks.addOnce(postInit);
 190          plot.eventListenerHooks.addOnce('jqplotMouseMove', handleMove);
 191          plot.eventListenerHooks.addOnce('jqplotMouseDown', handleMouseDown);
 192          plot.eventListenerHooks.addOnce('jqplotMouseUp', handleMouseUp);
 193          plot.eventListenerHooks.addOnce('jqplotClick', handleClick);
 194          plot.eventListenerHooks.addOnce('jqplotRightClick', handleRightClick);
 195          plot.postDrawHooks.addOnce(postPlotDraw);
 196      };
 197      
 198      $.jqplot.PieRenderer.prototype.setGridData = function(plot) {
 199          // set gridData property.  This will hold angle in radians of each data point.
 200          var stack = [];
 201          var td = [];
 202          var sa = this.startAngle/180*Math.PI;
 203          var tot = 0;
 204          // don't know if we have any valid data yet, so set plot to not draw.
 205          this._drawData = false;
 206          for (var i=0; i<this.data.length; i++){
 207              if (this.data[i][1] != 0) {
 208                  // we have data, O.K. to draw.
 209                  this._drawData = true;
 210              }
 211              stack.push(this.data[i][1]);
 212              td.push([this.data[i][0]]);
 213              if (i>0) {
 214                  stack[i] += stack[i-1];
 215              }
 216              tot += this.data[i][1];
 217          }
 218          var fact = Math.PI*2/stack[stack.length - 1];
 219          
 220          for (var i=0; i<stack.length; i++) {
 221              td[i][1] = stack[i] * fact;
 222              td[i][2] = this.data[i][1]/tot;
 223          }
 224          this.gridData = td;
 225      };
 226      
 227      $.jqplot.PieRenderer.prototype.makeGridData = function(data, plot) {
 228          var stack = [];
 229          var td = [];
 230          var tot = 0;
 231          var sa = this.startAngle/180*Math.PI;
 232          // don't know if we have any valid data yet, so set plot to not draw.
 233          this._drawData = false;
 234          for (var i=0; i<data.length; i++){
 235              if (this.data[i][1] != 0) {
 236                  // we have data, O.K. to draw.
 237                  this._drawData = true;
 238              }
 239              stack.push(data[i][1]);
 240              td.push([data[i][0]]);
 241              if (i>0) {
 242                  stack[i] += stack[i-1];
 243              }
 244              tot += data[i][1];
 245          }
 246          var fact = Math.PI*2/stack[stack.length - 1];
 247          
 248          for (var i=0; i<stack.length; i++) {
 249              td[i][1] = stack[i] * fact;
 250              td[i][2] = data[i][1]/tot;
 251          }
 252          return td;
 253      };
 254  
 255      function calcRadiusAdjustment(ang) {
 256          return Math.sin((ang - (ang-Math.PI) / 8 / Math.PI )/2.0);
 257      }
 258  
 259      function calcRPrime(ang1, ang2, sliceMargin, fill, lineWidth) {
 260          var rprime = 0;
 261          var ang = ang2 - ang1;
 262          var absang = Math.abs(ang);
 263          var sm = sliceMargin;
 264          if (fill == false) {
 265              sm += lineWidth;
 266          }
 267  
 268          if (sm > 0 && absang > 0.01 && absang < 6.282) {
 269              rprime = parseFloat(sm) / 2.0 / calcRadiusAdjustment(ang);
 270          }
 271  
 272          return rprime;
 273      }
 274      
 275      $.jqplot.PieRenderer.prototype.drawSlice = function (ctx, ang1, ang2, color, isShadow) {
 276          if (this._drawData) {
 277              var r = this._radius;
 278              var fill = this.fill;
 279              var lineWidth = this.lineWidth;
 280              var sm = this.sliceMargin;
 281              if (this.fill == false) {
 282                  sm += this.lineWidth;
 283              }
 284              ctx.save();
 285              ctx.translate(this._center[0], this._center[1]);
 286              
 287              var rprime = calcRPrime(ang1, ang2, this.sliceMargin, this.fill, this.lineWidth);
 288  
 289              var transx = rprime * Math.cos((ang1 + ang2) / 2.0);
 290              var transy = rprime * Math.sin((ang1 + ang2) / 2.0);
 291  
 292              if ((ang2 - ang1) <= Math.PI) {
 293                  r -= rprime;  
 294              }
 295              else {
 296                  r += rprime;
 297              }
 298  
 299              ctx.translate(transx, transy);
 300              
 301              if (isShadow) {
 302                  for (var i=0, l=this.shadowDepth; i<l; i++) {
 303                      ctx.save();
 304                      ctx.translate(this.shadowOffset*Math.cos(this.shadowAngle/180*Math.PI), this.shadowOffset*Math.sin(this.shadowAngle/180*Math.PI));
 305                      doDraw(r);
 306                  }
 307                  for (var i=0, l=this.shadowDepth; i<l; i++) {
 308                      ctx.restore();
 309                  }
 310              }
 311      
 312              else {
 313                  doDraw(r);
 314              }
 315              ctx.restore();
 316          }
 317      
 318          function doDraw (rad) {
 319              // Fix for IE and Chrome that can't seem to draw circles correctly.
 320              // ang2 should always be <= 2 pi since that is the way the data is converted.
 321              // 2Pi = 6.2831853, Pi = 3.1415927
 322               if (ang2 > 6.282 + this.startAngle) {
 323                  ang2 = 6.282 + this.startAngle;
 324                  if (ang1 > ang2) {
 325                      ang1 = 6.281 + this.startAngle;
 326                  }
 327              }
 328              // Fix for IE, where it can't seem to handle 0 degree angles.  Also avoids
 329              // ugly line on unfilled pies.
 330              if (ang1 >= ang2) {
 331                  return;
 332              }            
 333          
 334              ctx.beginPath();  
 335              ctx.fillStyle = color;
 336              ctx.strokeStyle = color;
 337              ctx.lineWidth = lineWidth;
 338              ctx.arc(0, 0, rad, ang1, ang2, false);
 339              ctx.lineTo(0,0);
 340              ctx.closePath();
 341          
 342              if (fill) {
 343                  ctx.fill();
 344              }
 345              else {
 346                  ctx.stroke();
 347              }
 348          }
 349      };
 350      
 351      // called with scope of series
 352      $.jqplot.PieRenderer.prototype.draw = function (ctx, gd, options, plot) {
 353          var i;
 354          var opts = (options != undefined) ? options : {};
 355          // offset and direction of offset due to legend placement
 356          var offx = 0;
 357          var offy = 0;
 358          var trans = 1;
 359          var colorGenerator = new $.jqplot.ColorGenerator(this.seriesColors);
 360          if (options.legendInfo && options.legendInfo.placement == 'insideGrid') {
 361              var li = options.legendInfo;
 362              switch (li.location) {
 363                  case 'nw':
 364                      offx = li.width + li.xoffset;
 365                      break;
 366                  case 'w':
 367                      offx = li.width + li.xoffset;
 368                      break;
 369                  case 'sw':
 370                      offx = li.width + li.xoffset;
 371                      break;
 372                  case 'ne':
 373                      offx = li.width + li.xoffset;
 374                      trans = -1;
 375                      break;
 376                  case 'e':
 377                      offx = li.width + li.xoffset;
 378                      trans = -1;
 379                      break;
 380                  case 'se':
 381                      offx = li.width + li.xoffset;
 382                      trans = -1;
 383                      break;
 384                  case 'n':
 385                      offy = li.height + li.yoffset;
 386                      break;
 387                  case 's':
 388                      offy = li.height + li.yoffset;
 389                      trans = -1;
 390                      break;
 391                  default:
 392                      break;
 393              }
 394          }
 395          
 396          var shadow = (opts.shadow != undefined) ? opts.shadow : this.shadow;
 397          var fill = (opts.fill != undefined) ? opts.fill : this.fill;
 398          var cw = ctx.canvas.width;
 399          var ch = ctx.canvas.height;
 400          var w = cw - offx - 2 * this.padding;
 401          var h = ch - offy - 2 * this.padding;
 402          var mindim = Math.min(w,h);
 403          var d = mindim;
 404          
 405          // Fixes issue #272.  Thanks hugwijst!
 406          // reset slice angles array.
 407          this._sliceAngles = [];
 408  
 409          var sm = this.sliceMargin;
 410          if (this.fill == false) {
 411              sm += this.lineWidth;
 412          }
 413          
 414          var rprime;
 415          var maxrprime = 0;
 416  
 417          var ang, ang1, ang2, shadowColor;
 418          var sa = this.startAngle / 180 * Math.PI;
 419  
 420          // have to pre-draw shadows, so loop throgh here and calculate some values also.
 421          for (var i=0, l=gd.length; i<l; i++) {
 422              ang1 = (i == 0) ? sa : gd[i-1][1] + sa;
 423              ang2 = gd[i][1] + sa;
 424  
 425              this._sliceAngles.push([ang1, ang2]);
 426  
 427              rprime = calcRPrime(ang1, ang2, this.sliceMargin, this.fill, this.lineWidth);
 428  
 429              if (Math.abs(ang2-ang1) > Math.PI) {
 430                  maxrprime = Math.max(rprime, maxrprime);  
 431              }
 432          }
 433  
 434          if (this.diameter != null && this.diameter > 0) {
 435              this._diameter = this.diameter - 2*maxrprime;
 436          }
 437          else {
 438              this._diameter = d - 2*maxrprime;
 439          }
 440  
 441          // Need to check for undersized pie.  This can happen if
 442          // plot area too small and legend is too big.
 443          if (this._diameter < 6) {
 444              $.jqplot.log('Diameter of pie too small, not rendering.');
 445              return;
 446          }
 447  
 448          var r = this._radius = this._diameter/2;
 449  
 450          this._center = [(cw - trans * offx)/2 + trans * offx + maxrprime * Math.cos(sa), (ch - trans*offy)/2 + trans * offy + maxrprime * Math.sin(sa)];
 451  
 452          if (this.shadow) {
 453              for (var i=0, l=gd.length; i<l; i++) {
 454                  shadowColor = 'rgba(0,0,0,'+this.shadowAlpha+')';
 455                  this.renderer.drawSlice.call (this, ctx, this._sliceAngles[i][0], this._sliceAngles[i][1], shadowColor, true);
 456              }
 457          }
 458          
 459          for (var i=0; i<gd.length; i++) {
 460                        
 461              this.renderer.drawSlice.call (this, ctx, this._sliceAngles[i][0], this._sliceAngles[i][1], colorGenerator.next(), false);
 462          
 463              if (this.showDataLabels && gd[i][2]*100 >= this.dataLabelThreshold) {
 464                  var fstr, avgang = (this._sliceAngles[i][0] + this._sliceAngles[i][1])/2, label;
 465              
 466                  if (this.dataLabels == 'label') {
 467                      fstr = this.dataLabelFormatString || '%s';
 468                      label = $.jqplot.sprintf(fstr, gd[i][0]);
 469                  }
 470                  else if (this.dataLabels == 'value') {
 471                      fstr = this.dataLabelFormatString || '%d';
 472                      label = $.jqplot.sprintf(fstr, this.data[i][1]);
 473                  }
 474                  else if (this.dataLabels == 'percent') {
 475                      fstr = this.dataLabelFormatString || '%d%%';
 476                      label = $.jqplot.sprintf(fstr, gd[i][2]*100);
 477                  }
 478                  else if (this.dataLabels.constructor == Array) {
 479                      fstr = this.dataLabelFormatString || '%s';
 480                      label = $.jqplot.sprintf(fstr, this.dataLabels[i]);
 481                  }
 482              
 483                  var fact = (this._radius ) * this.dataLabelPositionFactor + this.sliceMargin + this.dataLabelNudge;
 484              
 485                  var x = this._center[0] + Math.cos(avgang) * fact + this.canvas._offsets.left;
 486                  var y = this._center[1] + Math.sin(avgang) * fact + this.canvas._offsets.top;
 487              
 488                  var labelelem = $('<div class="jqplot-pie-series jqplot-data-label" style="position:absolute;">' + label + '</div>').insertBefore(plot.eventCanvas._elem);
 489                  if (this.dataLabelCenterOn) {
 490                      x -= labelelem.width()/2;
 491                      y -= labelelem.height()/2;
 492                  }
 493                  else {
 494                      x -= labelelem.width() * Math.sin(avgang/2);
 495                      y -= labelelem.height()/2;
 496                  }
 497                  x = Math.round(x);
 498                  y = Math.round(y);
 499                  labelelem.css({left: x, top: y});
 500              }
 501          }            
 502      };
 503      
 504      $.jqplot.PieAxisRenderer = function() {
 505          $.jqplot.LinearAxisRenderer.call(this);
 506      };
 507      
 508      $.jqplot.PieAxisRenderer.prototype = new $.jqplot.LinearAxisRenderer();
 509      $.jqplot.PieAxisRenderer.prototype.constructor = $.jqplot.PieAxisRenderer;
 510          
 511      
 512      // There are no traditional axes on a pie chart.  We just need to provide
 513      // dummy objects with properties so the plot will render.
 514      // called with scope of axis object.
 515      $.jqplot.PieAxisRenderer.prototype.init = function(options){
 516          //
 517          this.tickRenderer = $.jqplot.PieTickRenderer;
 518          $.extend(true, this, options);
 519          // I don't think I'm going to need _dataBounds here.
 520          // have to go Axis scaling in a way to fit chart onto plot area
 521          // and provide u2p and p2u functionality for mouse cursor, etc.
 522          // for convienence set _dataBounds to 0 and 100 and
 523          // set min/max to 0 and 100.
 524          this._dataBounds = {min:0, max:100};
 525          this.min = 0;
 526          this.max = 100;
 527          this.showTicks = false;
 528          this.ticks = [];
 529          this.showMark = false;
 530          this.show = false; 
 531      };
 532      
 533      
 534      
 535      
 536      $.jqplot.PieLegendRenderer = function(){
 537          $.jqplot.TableLegendRenderer.call(this);
 538      };
 539      
 540      $.jqplot.PieLegendRenderer.prototype = new $.jqplot.TableLegendRenderer();
 541      $.jqplot.PieLegendRenderer.prototype.constructor = $.jqplot.PieLegendRenderer;
 542      
 543      /**
 544       * Class: $.jqplot.PieLegendRenderer
 545       * Legend Renderer specific to pie plots.  Set by default
 546       * when user creates a pie plot.
 547       */
 548      $.jqplot.PieLegendRenderer.prototype.init = function(options) {
 549          // Group: Properties
 550          //
 551          // prop: numberRows
 552          // Maximum number of rows in the legend.  0 or null for unlimited.
 553          this.numberRows = null;
 554          // prop: numberColumns
 555          // Maximum number of columns in the legend.  0 or null for unlimited.
 556          this.numberColumns = null;
 557          $.extend(true, this, options);
 558      };
 559      
 560      // called with context of legend
 561      $.jqplot.PieLegendRenderer.prototype.draw = function() {
 562          var legend = this;
 563          if (this.show) {
 564              var series = this._series;
 565  
 566  
 567              this._elem = $(document.createElement('table'));
 568              this._elem.addClass('jqplot-table-legend');
 569  
 570              var ss = {position:'absolute'};
 571              if (this.background) {
 572                  ss['background'] = this.background;
 573              }
 574              if (this.border) {
 575                  ss['border'] = this.border;
 576              }
 577              if (this.fontSize) {
 578                  ss['fontSize'] = this.fontSize;
 579              }
 580              if (this.fontFamily) {
 581                  ss['fontFamily'] = this.fontFamily;
 582              }
 583              if (this.textColor) {
 584                  ss['textColor'] = this.textColor;
 585              }
 586              if (this.marginTop != null) {
 587                  ss['marginTop'] = this.marginTop;
 588              }
 589              if (this.marginBottom != null) {
 590                  ss['marginBottom'] = this.marginBottom;
 591              }
 592              if (this.marginLeft != null) {
 593                  ss['marginLeft'] = this.marginLeft;
 594              }
 595              if (this.marginRight != null) {
 596                  ss['marginRight'] = this.marginRight;
 597              }
 598  
 599              this._elem.css(ss);
 600  
 601              // Pie charts legends don't go by number of series, but by number of data points
 602              // in the series.  Refactor things here for that.
 603              
 604              var pad = false, 
 605                  reverse = false,
 606                  nr, 
 607                  nc;
 608              var s = series[0];
 609              var colorGenerator = new $.jqplot.ColorGenerator(s.seriesColors);
 610              
 611              if (s.show) {
 612                  var pd = s.data;
 613                  if (this.numberRows) {
 614                      nr = this.numberRows;
 615                      if (!this.numberColumns){
 616                          nc = Math.ceil(pd.length/nr);
 617                      }
 618                      else{
 619                          nc = this.numberColumns;
 620                      }
 621                  }
 622                  else if (this.numberColumns) {
 623                      nc = this.numberColumns;
 624                      nr = Math.ceil(pd.length/this.numberColumns);
 625                  }
 626                  else {
 627                      nr = pd.length;
 628                      nc = 1;
 629                  }
 630                  
 631                  var i, j;
 632                  var tr, td1, td2; 
 633                  var lt, rs, color;
 634                  var idx = 0; 
 635                  var div0, div1;   
 636                  
 637                  for (i=0; i<nr; i++) {
 638                      tr = $(document.createElement('tr'));
 639                      tr.addClass('jqplot-table-legend');
 640                      
 641                      if (reverse){
 642                          tr.prependTo(this._elem);
 643                      }
 644                      
 645                      else{
 646                          tr.appendTo(this._elem);
 647                      }
 648                      
 649                      for (j=0; j<nc; j++) {
 650                          if (idx < pd.length){
 651                              lt = this.labels[idx] || pd[idx][0].toString();
 652                              color = colorGenerator.next();
 653                              if (!reverse){
 654                                  if (i>0){
 655                                      pad = true;
 656                                  }
 657                                  else{
 658                                      pad = false;
 659                                  }
 660                              }
 661                              else{
 662                                  if (i == nr -1){
 663                                      pad = false;
 664                                  }
 665                                  else{
 666                                      pad = true;
 667                                  }
 668                              }
 669                              rs = (pad) ? this.rowSpacing : '0';
 670  
 671  
 672  
 673                              td1 = $(document.createElement('td'));
 674                              td1.addClass('jqplot-table-legend jqplot-table-legend-swatch');
 675                              td1.css({textAlign: 'center', paddingTop: rs});
 676  
 677                              div0 = $(document.createElement('div'));
 678                              div0.addClass('jqplot-table-legend-swatch-outline');
 679                              div1 = $(document.createElement('div'));
 680                              div1.addClass('jqplot-table-legend-swatch');
 681                              div1.css({backgroundColor: color, borderColor: color});
 682                              td1.append(div0.append(div1));
 683  
 684                              td2 = $(document.createElement('td'));
 685                              td2.addClass('jqplot-table-legend jqplot-table-legend-label');
 686                              td2.css('paddingTop', rs);
 687  
 688                              if (this.escapeHtml){
 689                                  td2.text(lt);
 690                              }
 691                              else {
 692                                  td2.html(lt);
 693                              }
 694                              if (reverse) {
 695                                  td2.prependTo(tr);
 696                                  td1.prependTo(tr);
 697                              }
 698                              else {
 699                                  td1.appendTo(tr);
 700                                  td2.appendTo(tr);
 701                              }
 702                              pad = true;
 703                          }
 704                          idx++;
 705                      }   
 706                  }
 707              }
 708          }
 709          return this._elem;                
 710      };
 711      
 712      $.jqplot.PieRenderer.prototype.handleMove = function(ev, gridpos, datapos, neighbor, plot) {
 713          if (neighbor) {
 714              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 715              plot.target.trigger('jqplotDataMouseOver', ins);
 716              if (plot.series[ins[0]].highlightMouseOver && !(ins[0] == plot.plugins.pieRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {
 717                  plot.target.trigger('jqplotDataHighlight', ins);
 718                  highlight (plot, ins[0], ins[1]);
 719              }
 720          }
 721          else if (neighbor == null) {
 722              unhighlight (plot);
 723          }
 724      };
 725      
 726      
 727      // this.eventCanvas._elem.bind($.jqplot.eventListenerHooks[i][0], {plot:this}, $.jqplot.eventListenerHooks[i][1]);
 728      
 729      // setup default renderers for axes and legend so user doesn't have to
 730      // called with scope of plot
 731      function preInit(target, data, options) {
 732          options = options || {};
 733          options.axesDefaults = options.axesDefaults || {};
 734          options.legend = options.legend || {};
 735          options.seriesDefaults = options.seriesDefaults || {};
 736          // only set these if there is a pie series
 737          var setopts = false;
 738          if (options.seriesDefaults.renderer == $.jqplot.PieRenderer) {
 739              setopts = true;
 740          }
 741          else if (options.series) {
 742              for (var i=0; i < options.series.length; i++) {
 743                  if (options.series[i].renderer == $.jqplot.PieRenderer) {
 744                      setopts = true;
 745                  }
 746              }
 747          }
 748          
 749          if (setopts) {
 750              options.axesDefaults.renderer = $.jqplot.PieAxisRenderer;
 751              options.legend.renderer = $.jqplot.PieLegendRenderer;
 752              options.legend.preDraw = true;
 753              options.seriesDefaults.pointLabels = {show: false};
 754          }
 755      }
 756      
 757      function postInit(target, data, options) {
 758          for (var i=0; i<this.series.length; i++) {
 759              if (this.series[i].renderer.constructor == $.jqplot.PieRenderer) {
 760                  // don't allow mouseover and mousedown at same time.
 761                  if (this.series[i].highlightMouseOver) {
 762                      this.series[i].highlightMouseDown = false;
 763                  }
 764              }
 765          }
 766      }
 767      
 768      // called with scope of plot
 769      function postParseOptions(options) {
 770          for (var i=0; i<this.series.length; i++) {
 771              this.series[i].seriesColors = this.seriesColors;
 772              this.series[i].colorGenerator = $.jqplot.colorGenerator;
 773          }
 774      }
 775      
 776      function highlight (plot, sidx, pidx) {
 777          var s = plot.series[sidx];
 778          var canvas = plot.plugins.pieRenderer.highlightCanvas;
 779          canvas._ctx.clearRect(0,0,canvas._ctx.canvas.width, canvas._ctx.canvas.height);
 780          s._highlightedPoint = pidx;
 781          plot.plugins.pieRenderer.highlightedSeriesIndex = sidx;
 782          s.renderer.drawSlice.call(s, canvas._ctx, s._sliceAngles[pidx][0], s._sliceAngles[pidx][1], s.highlightColorGenerator.get(pidx), false);
 783      }
 784      
 785      function unhighlight (plot) {
 786          var canvas = plot.plugins.pieRenderer.highlightCanvas;
 787          canvas._ctx.clearRect(0,0, canvas._ctx.canvas.width, canvas._ctx.canvas.height);
 788          for (var i=0; i<plot.series.length; i++) {
 789              plot.series[i]._highlightedPoint = null;
 790          }
 791          plot.plugins.pieRenderer.highlightedSeriesIndex = null;
 792          plot.target.trigger('jqplotDataUnhighlight');
 793      }
 794   
 795      function handleMove(ev, gridpos, datapos, neighbor, plot) {
 796          if (neighbor) {
 797              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 798              var evt1 = jQuery.Event('jqplotDataMouseOver');
 799              evt1.pageX = ev.pageX;
 800              evt1.pageY = ev.pageY;
 801              plot.target.trigger(evt1, ins);
 802              if (plot.series[ins[0]].highlightMouseOver && !(ins[0] == plot.plugins.pieRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {
 803                  var evt = jQuery.Event('jqplotDataHighlight');
 804          evt.which = ev.which;
 805                  evt.pageX = ev.pageX;
 806                  evt.pageY = ev.pageY;
 807                  plot.target.trigger(evt, ins);
 808                  highlight (plot, ins[0], ins[1]);
 809              }
 810          }
 811          else if (neighbor == null) {
 812              unhighlight (plot);
 813          }
 814      } 
 815      
 816      function handleMouseDown(ev, gridpos, datapos, neighbor, plot) {
 817          if (neighbor) {
 818              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 819              if (plot.series[ins[0]].highlightMouseDown && !(ins[0] == plot.plugins.pieRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {
 820                  var evt = jQuery.Event('jqplotDataHighlight');
 821          evt.which = ev.which;
 822                  evt.pageX = ev.pageX;
 823                  evt.pageY = ev.pageY;
 824                  plot.target.trigger(evt, ins);
 825                  highlight (plot, ins[0], ins[1]);
 826              }
 827          }
 828          else if (neighbor == null) {
 829              unhighlight (plot);
 830          }
 831      }
 832      
 833      function handleMouseUp(ev, gridpos, datapos, neighbor, plot) {
 834          var idx = plot.plugins.pieRenderer.highlightedSeriesIndex;
 835          if (idx != null && plot.series[idx].highlightMouseDown) {
 836              unhighlight(plot);
 837          }
 838      }
 839      
 840      function handleClick(ev, gridpos, datapos, neighbor, plot) {
 841          if (neighbor) {
 842              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 843              var evt = jQuery.Event('jqplotDataClick');
 844          evt.which = ev.which;
 845              evt.pageX = ev.pageX;
 846              evt.pageY = ev.pageY;
 847              plot.target.trigger(evt, ins);
 848          }
 849      }
 850      
 851      function handleRightClick(ev, gridpos, datapos, neighbor, plot) {
 852          if (neighbor) {
 853              var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];
 854              var idx = plot.plugins.pieRenderer.highlightedSeriesIndex;
 855              if (idx != null && plot.series[idx].highlightMouseDown) {
 856                  unhighlight(plot);
 857              }
 858              var evt = jQuery.Event('jqplotDataRightClick');
 859          evt.which = ev.which;
 860              evt.pageX = ev.pageX;
 861              evt.pageY = ev.pageY;
 862              plot.target.trigger(evt, ins);
 863          }
 864      }    
 865      
 866      // called within context of plot
 867      // create a canvas which we can draw on.
 868      // insert it before the eventCanvas, so eventCanvas will still capture events.
 869      function postPlotDraw() {
 870          // Memory Leaks patch    
 871          if (this.plugins.pieRenderer && this.plugins.pieRenderer.highlightCanvas) {
 872              this.plugins.pieRenderer.highlightCanvas.resetCanvas();
 873              this.plugins.pieRenderer.highlightCanvas = null;
 874          }
 875  
 876          this.plugins.pieRenderer = {highlightedSeriesIndex:null};
 877          this.plugins.pieRenderer.highlightCanvas = new $.jqplot.GenericCanvas();
 878          
 879          // do we have any data labels?  if so, put highlight canvas before those
 880          var labels = $(this.targetId+' .jqplot-data-label');
 881          if (labels.length) {
 882              $(labels[0]).before(this.plugins.pieRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-pieRenderer-highlight-canvas', this._plotDimensions, this));
 883          }
 884          // else put highlight canvas before event canvas.
 885          else {
 886              this.eventCanvas._elem.before(this.plugins.pieRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-pieRenderer-highlight-canvas', this._plotDimensions, this));
 887          }
 888          
 889          var hctx = this.plugins.pieRenderer.highlightCanvas.setContext();
 890          this.eventCanvas._elem.bind('mouseleave', {plot:this}, function (ev) { unhighlight(ev.data.plot); });
 891      }
 892      
 893      $.jqplot.preInitHooks.push(preInit);
 894      
 895      $.jqplot.PieTickRenderer = function() {
 896          $.jqplot.AxisTickRenderer.call(this);
 897      };
 898      
 899      $.jqplot.PieTickRenderer.prototype = new $.jqplot.AxisTickRenderer();
 900      $.jqplot.PieTickRenderer.prototype.constructor = $.jqplot.PieTickRenderer;
 901      
 902  })(jQuery);
 903      
 904