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/**

 * jqPlot

 * Pure JavaScript plotting plugin using jQuery

 *

 * Version: 1.0.8

 * Revision: 1250

 *

 * Copyright (c) 2009-2013 Chris Leonello

 * jqPlot is currently available for use in all personal or commercial projects

 * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL

 * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can

 * choose the license that best suits your project and use it accordingly.

 *

 * Although not required, the author would appreciate an email letting him

 * know of any substantial use of jqPlot.  You can reach the author at:

 * chris at jqplot dot com or see http://www.jqplot.com/info.php .

 *

 * If you are feeling kind and generous, consider supporting the project by

 * making a donation at: http://www.jqplot.com/donate.php .

 *

 * sprintf functions contained in jqplot.sprintf.js by Ash Searle:

 *

 *     version 2007.04.27

 *     author Ash Searle

 *     http://hexmen.com/blog/2007/03/printf-sprintf/

 *     http://hexmen.com/js/sprintf.js

 *     The author (Ash Searle) has placed this code in the public domain:

 *     "This code is unrestricted: you are free to use it however you like."

 *

 */

(function($) {

    /**

     * Class: $.jqplot.PieRenderer

     * Plugin renderer to draw a pie chart.

     * x values, if present, will be used as slice labels.

     * y values give slice size.

     *

     * To use this renderer, you need to include the

     * pie renderer plugin, for example:

     *

     * > <script type="text/javascript" src="plugins/jqplot.pieRenderer.js"></script>

     *

     * Properties described here are passed into the $.jqplot function

     * as options on the series renderer.  For example:

     *

     * > plot2 = $.jqplot('chart2', [s1, s2], {

     * >     seriesDefaults: {

     * >         renderer:$.jqplot.PieRenderer,

     * >         rendererOptions:{

     * >              sliceMargin: 2,

     * >              startAngle: -90

     * >          }

     * >      }

     * > });

     *

     * A pie plot will trigger events on the plot target

     * according to user interaction.  All events return the event object,

     * the series index, the point (slice) index, and the point data for

     * the appropriate slice.

     *

     * 'jqplotDataMouseOver' - triggered when user mouseing over a slice.

     * 'jqplotDataHighlight' - triggered the first time user mouses over a slice,

     * if highlighting is enabled.

     * 'jqplotDataUnhighlight' - triggered when a user moves the mouse out of

     * a highlighted slice.

     * 'jqplotDataClick' - triggered when the user clicks on a slice.

     * 'jqplotDataRightClick' - tiggered when the user right clicks on a slice if

     * the "captureRightClick" option is set to true on the plot.

     */

    $.jqplot.PieRenderer = function(){

        $.jqplot.LineRenderer.call(this);

    };

    $.jqplot.PieRenderer.prototype = new $.jqplot.LineRenderer();

    $.jqplot.PieRenderer.prototype.constructor = $.jqplot.PieRenderer;

    // called with scope of a series

    $.jqplot.PieRenderer.prototype.init = function(options, plot) {

        // Group: Properties

        //

        // prop: diameter

        // Outer diameter of the pie, auto computed by default

        this.diameter = null;

        // prop: padding

        // padding between the pie and plot edges, legend, etc.

        this.padding = 20;

        // prop: sliceMargin

        // angular spacing between pie slices in degrees.

        this.sliceMargin = 0;

        // prop: fill

        // true or false, whether to fil the slices.

        this.fill = true;

        // prop: shadowOffset

        // offset of the shadow from the slice and offset of

        // each succesive stroke of the shadow from the last.

        this.shadowOffset = 2;

        // prop: shadowAlpha

        // transparency of the shadow (0 = transparent, 1 = opaque)

        this.shadowAlpha = 0.07;

        // prop: shadowDepth

        // number of strokes to apply to the shadow,

        // each stroke offset shadowOffset from the last.

        this.shadowDepth = 5;

        // prop: highlightMouseOver

        // True to highlight slice when moused over.

        // This must be false to enable highlightMouseDown to highlight when clicking on a slice.

        this.highlightMouseOver = true;

        // prop: highlightMouseDown

        // True to highlight when a mouse button is pressed over a slice.

        // This will be disabled if highlightMouseOver is true.

        this.highlightMouseDown = false;

        // prop: highlightColors

        // an array of colors to use when highlighting a slice.

        this.highlightColors = [];

        // prop: dataLabels

        // Either 'label', 'value', 'percent' or an array of labels to place on the pie slices.

        // Defaults to percentage of each pie slice.

        this.dataLabels = 'percent';

        // prop: showDataLabels

        // true to show data labels on slices.

        this.showDataLabels = false;

        // prop: dataLabelFormatString

        // Format string for data labels.  If none, '%s' is used for "label" and for arrays, '%d' for value and '%d%%' for percentage.

        this.dataLabelFormatString = null;

        // prop: dataLabelThreshold

        // Threshhold in percentage (0-100) of pie area, below which no label will be displayed.

        // This applies to all label types, not just to percentage labels.

        this.dataLabelThreshold = 3;

        // prop: dataLabelPositionFactor

        // A Multiplier (0-1) of the pie radius which controls position of label on slice.

        // Increasing will slide label toward edge of pie, decreasing will slide label toward center of pie.

        this.dataLabelPositionFactor = 0.52;

        // prop: dataLabelNudge

        // Number of pixels to slide the label away from (+) or toward (-) the center of the pie.

        this.dataLabelNudge = 2;

        // prop: dataLabelCenterOn

        // True to center the data label at its position.

        // False to set the inside facing edge of the label at its position.

        this.dataLabelCenterOn = true;

        // prop: startAngle

        // Angle to start drawing pie in degrees.

        // According to orientation of canvas coordinate system:

        // 0 = on the positive x axis

        // -90 = on the positive y axis.

        // 90 = on the negaive y axis.

        // 180 or - 180 = on the negative x axis.

        this.startAngle = 0;

        this.tickRenderer = $.jqplot.PieTickRenderer;

        // Used as check for conditions where pie shouldn't be drawn.

        this._drawData = true;

        this._type = 'pie';

        // if user has passed in highlightMouseDown option and not set highlightMouseOver, disable highlightMouseOver

        if (options.highlightMouseDown && options.highlightMouseOver == null) {

            options.highlightMouseOver = false;

        }

        $.extend(true, this, options);

        if (this.sliceMargin < 0) {

            this.sliceMargin = 0;

        }

        this._diameter = null;

        this._radius = null;

        // array of [start,end] angles arrays, one for each slice.  In radians.

        this._sliceAngles = [];

        // index of the currenty highlighted point, if any

        this._highlightedPoint = null;

        // set highlight colors if none provided

        if (this.highlightColors.length == 0) {

            for (var i=0; i<this.seriesColors.length; i++){

                var rgba = $.jqplot.getColorComponents(this.seriesColors[i]);

                var newrgb = [rgba[0], rgba[1], rgba[2]];

                var sum = newrgb[0] + newrgb[1] + newrgb[2];

                for (var j=0; j<3; j++) {

                    // when darkening, lowest color component can be is 60.

                    newrgb[j] = (sum > 570) ?  newrgb[j] * 0.8 : newrgb[j] + 0.3 * (255 - newrgb[j]);

                    newrgb[j] = parseInt(newrgb[j], 10);

                }

                this.highlightColors.push('rgb('+newrgb[0]+','+newrgb[1]+','+newrgb[2]+')');

            }

        }

        this.highlightColorGenerator = new $.jqplot.ColorGenerator(this.highlightColors);

        plot.postParseOptionsHooks.addOnce(postParseOptions);

        plot.postInitHooks.addOnce(postInit);

        plot.eventListenerHooks.addOnce('jqplotMouseMove', handleMove);

        plot.eventListenerHooks.addOnce('jqplotMouseDown', handleMouseDown);

        plot.eventListenerHooks.addOnce('jqplotMouseUp', handleMouseUp);

        plot.eventListenerHooks.addOnce('jqplotClick', handleClick);

        plot.eventListenerHooks.addOnce('jqplotRightClick', handleRightClick);

        plot.postDrawHooks.addOnce(postPlotDraw);

    };

    $.jqplot.PieRenderer.prototype.setGridData = function(plot) {

        // set gridData property.  This will hold angle in radians of each data point.

        var stack = [];

        var td = [];

        var sa = this.startAngle/180*Math.PI;

        var tot = 0;

        // don't know if we have any valid data yet, so set plot to not draw.

        this._drawData = false;

        for (var i=0; i<this.data.length; i++){

            if (this.data[i][1] != 0) {

                // we have data, O.K. to draw.

                this._drawData = true;

            }

            stack.push(this.data[i][1]);

            td.push([this.data[i][0]]);

            if (i>0) {

                stack[i] += stack[i-1];

            }

            tot += this.data[i][1];

        }

        var fact = Math.PI*2/stack[stack.length - 1];

        for (var i=0; i<stack.length; i++) {

            td[i][1] = stack[i] * fact;

            td[i][2] = this.data[i][1]/tot;

        }

        this.gridData = td;

    };

    $.jqplot.PieRenderer.prototype.makeGridData = function(data, plot) {

        var stack = [];

        var td = [];

        var tot = 0;

        var sa = this.startAngle/180*Math.PI;

        // don't know if we have any valid data yet, so set plot to not draw.

        this._drawData = false;

        for (var i=0; i<data.length; i++){

            if (this.data[i][1] != 0) {

                // we have data, O.K. to draw.

                this._drawData = true;

            }

            stack.push(data[i][1]);

            td.push([data[i][0]]);

            if (i>0) {

                stack[i] += stack[i-1];

            }

            tot += data[i][1];

        }

        var fact = Math.PI*2/stack[stack.length - 1];

        for (var i=0; i<stack.length; i++) {

            td[i][1] = stack[i] * fact;

            td[i][2] = data[i][1]/tot;

        }

        return td;

    };

    function calcRadiusAdjustment(ang) {

        return Math.sin((ang - (ang-Math.PI) / 8 / Math.PI )/2.0);

    }

    function calcRPrime(ang1, ang2, sliceMargin, fill, lineWidth) {

        var rprime = 0;

        var ang = ang2 - ang1;

        var absang = Math.abs(ang);

        var sm = sliceMargin;

        if (fill == false) {

            sm += lineWidth;

        }

        if (sm > 0 && absang > 0.01 && absang < 6.282) {

            rprime = parseFloat(sm) / 2.0 / calcRadiusAdjustment(ang);

        }

        return rprime;

    }

    $.jqplot.PieRenderer.prototype.drawSlice = function (ctx, ang1, ang2, color, isShadow) {

        if (this._drawData) {

            var r = this._radius;

            var fill = this.fill;

            var lineWidth = this.lineWidth;

            var sm = this.sliceMargin;

            if (this.fill == false) {

                sm += this.lineWidth;

            }

            ctx.save();

            ctx.translate(this._center[0], this._center[1]);

            var rprime = calcRPrime(ang1, ang2, this.sliceMargin, this.fill, this.lineWidth);

            var transx = rprime * Math.cos((ang1 + ang2) / 2.0);

            var transy = rprime * Math.sin((ang1 + ang2) / 2.0);

            if ((ang2 - ang1) <= Math.PI) {

                r -= rprime;

            }

            else {

                r += rprime;

            }

            ctx.translate(transx, transy);

            if (isShadow) {

                for (var i=0, l=this.shadowDepth; i<l; i++) {

                    ctx.save();

                    ctx.translate(this.shadowOffset*Math.cos(this.shadowAngle/180*Math.PI), this.shadowOffset*Math.sin(this.shadowAngle/180*Math.PI));

                    doDraw(r);

                }

                for (var i=0, l=this.shadowDepth; i<l; i++) {

                    ctx.restore();

                }

            }

            else {

                doDraw(r);

            }

            ctx.restore();

        }

        function doDraw (rad) {

            // Fix for IE and Chrome that can't seem to draw circles correctly.

            // ang2 should always be <= 2 pi since that is the way the data is converted.

            // 2Pi = 6.2831853, Pi = 3.1415927

             if (ang2 > 6.282 + this.startAngle) {

                ang2 = 6.282 + this.startAngle;

                if (ang1 > ang2) {

                    ang1 = 6.281 + this.startAngle;

                }

            }

            // Fix for IE, where it can't seem to handle 0 degree angles.  Also avoids

            // ugly line on unfilled pies.

            if (ang1 >= ang2) {

                return;

            }

            ctx.beginPath();

            ctx.fillStyle = color;

            ctx.strokeStyle = color;

            ctx.lineWidth = lineWidth;

            ctx.arc(0, 0, rad, ang1, ang2, false);

            ctx.lineTo(0,0);

            ctx.closePath();

            if (fill) {

                ctx.fill();

            }

            else {

                ctx.stroke();

            }

        }

    };

    // called with scope of series

    $.jqplot.PieRenderer.prototype.draw = function (ctx, gd, options, plot) {

        var i;

        var opts = (options != undefined) ? options : {};

        // offset and direction of offset due to legend placement

        var offx = 0;

        var offy = 0;

        var trans = 1;

        var colorGenerator = new $.jqplot.ColorGenerator(this.seriesColors);

        if (options.legendInfo && options.legendInfo.placement == 'insideGrid') {

            var li = options.legendInfo;

            switch (li.location) {

                case 'nw':

                    offx = li.width + li.xoffset;

                    break;

                case 'w':

                    offx = li.width + li.xoffset;

                    break;

                case 'sw':

                    offx = li.width + li.xoffset;

                    break;

                case 'ne':

                    offx = li.width + li.xoffset;

                    trans = -1;

                    break;

                case 'e':

                    offx = li.width + li.xoffset;

                    trans = -1;

                    break;

                case 'se':

                    offx = li.width + li.xoffset;

                    trans = -1;

                    break;

                case 'n':

                    offy = li.height + li.yoffset;

                    break;

                case 's':

                    offy = li.height + li.yoffset;

                    trans = -1;

                    break;

                default:

                    break;

            }

        }

        var shadow = (opts.shadow != undefined) ? opts.shadow : this.shadow;

        var fill = (opts.fill != undefined) ? opts.fill : this.fill;

        var cw = ctx.canvas.width;

        var ch = ctx.canvas.height;

        var w = cw - offx - 2 * this.padding;

        var h = ch - offy - 2 * this.padding;

        var mindim = Math.min(w,h);

        var d = mindim;

        // Fixes issue #272.  Thanks hugwijst!

        // reset slice angles array.

        this._sliceAngles = [];

        var sm = this.sliceMargin;

        if (this.fill == false) {

            sm += this.lineWidth;

        }

        var rprime;

        var maxrprime = 0;

        var ang, ang1, ang2, shadowColor;

        var sa = this.startAngle / 180 * Math.PI;

        // have to pre-draw shadows, so loop throgh here and calculate some values also.

        for (var i=0, l=gd.length; i<l; i++) {

            ang1 = (i == 0) ? sa : gd[i-1][1] + sa;

            ang2 = gd[i][1] + sa;

            this._sliceAngles.push([ang1, ang2]);

            rprime = calcRPrime(ang1, ang2, this.sliceMargin, this.fill, this.lineWidth);

            if (Math.abs(ang2-ang1) > Math.PI) {

                maxrprime = Math.max(rprime, maxrprime);

            }

        }

        if (this.diameter != null && this.diameter > 0) {

            this._diameter = this.diameter - 2*maxrprime;

        }

        else {

            this._diameter = d - 2*maxrprime;

        }

        // Need to check for undersized pie.  This can happen if

        // plot area too small and legend is too big.

        if (this._diameter < 6) {

            $.jqplot.log('Diameter of pie too small, not rendering.');

            return;

        }

        var r = this._radius = this._diameter/2;

        this._center = [(cw - trans * offx)/2 + trans * offx + maxrprime * Math.cos(sa), (ch - trans*offy)/2 + trans * offy + maxrprime * Math.sin(sa)];

        if (this.shadow) {

            for (var i=0, l=gd.length; i<l; i++) {

                shadowColor = 'rgba(0,0,0,'+this.shadowAlpha+')';

                this.renderer.drawSlice.call (this, ctx, this._sliceAngles[i][0], this._sliceAngles[i][1], shadowColor, true);

            }

        }

        for (var i=0; i<gd.length; i++) {

            this.renderer.drawSlice.call (this, ctx, this._sliceAngles[i][0], this._sliceAngles[i][1], colorGenerator.next(), false);

            if (this.showDataLabels && gd[i][2]*100 >= this.dataLabelThreshold) {

                var fstr, avgang = (this._sliceAngles[i][0] + this._sliceAngles[i][1])/2, label;

                if (this.dataLabels == 'label') {

                    fstr = this.dataLabelFormatString || '%s';

                    label = $.jqplot.sprintf(fstr, gd[i][0]);

                }

                else if (this.dataLabels == 'value') {

                    fstr = this.dataLabelFormatString || '%d';

                    label = $.jqplot.sprintf(fstr, this.data[i][1]);

                }

                else if (this.dataLabels == 'percent') {

                    fstr = this.dataLabelFormatString || '%d%%';

                    label = $.jqplot.sprintf(fstr, gd[i][2]*100);

                }

                else if (this.dataLabels.constructor == Array) {

                    fstr = this.dataLabelFormatString || '%s';

                    label = $.jqplot.sprintf(fstr, this.dataLabels[i]);

                }

                var fact = (this._radius ) * this.dataLabelPositionFactor + this.sliceMargin + this.dataLabelNudge;

                var x = this._center[0] + Math.cos(avgang) * fact + this.canvas._offsets.left;

                var y = this._center[1] + Math.sin(avgang) * fact + this.canvas._offsets.top;

                var labelelem = $('<div class="jqplot-pie-series jqplot-data-label" style="position:absolute;">' + label + '</div>').insertBefore(plot.eventCanvas._elem);

                if (this.dataLabelCenterOn) {

                    x -= labelelem.width()/2;

                    y -= labelelem.height()/2;

                }

                else {

                    x -= labelelem.width() * Math.sin(avgang/2);

                    y -= labelelem.height()/2;

                }

                x = Math.round(x);

                y = Math.round(y);

                labelelem.css({left: x, top: y});

            }

        }

    };

    $.jqplot.PieAxisRenderer = function() {

        $.jqplot.LinearAxisRenderer.call(this);

    };

    $.jqplot.PieAxisRenderer.prototype = new $.jqplot.LinearAxisRenderer();

    $.jqplot.PieAxisRenderer.prototype.constructor = $.jqplot.PieAxisRenderer;

    // There are no traditional axes on a pie chart.  We just need to provide

    // dummy objects with properties so the plot will render.

    // called with scope of axis object.

    $.jqplot.PieAxisRenderer.prototype.init = function(options){

        //

        this.tickRenderer = $.jqplot.PieTickRenderer;

        $.extend(true, this, options);

        // I don't think I'm going to need _dataBounds here.

        // have to go Axis scaling in a way to fit chart onto plot area

        // and provide u2p and p2u functionality for mouse cursor, etc.

        // for convienence set _dataBounds to 0 and 100 and

        // set min/max to 0 and 100.

        this._dataBounds = {min:0, max:100};

        this.min = 0;

        this.max = 100;

        this.showTicks = false;

        this.ticks = [];

        this.showMark = false;

        this.show = false;

    };

    $.jqplot.PieLegendRenderer = function(){

        $.jqplot.TableLegendRenderer.call(this);

    };

    $.jqplot.PieLegendRenderer.prototype = new $.jqplot.TableLegendRenderer();

    $.jqplot.PieLegendRenderer.prototype.constructor = $.jqplot.PieLegendRenderer;

    /**

     * Class: $.jqplot.PieLegendRenderer

     * Legend Renderer specific to pie plots.  Set by default

     * when user creates a pie plot.

     */

    $.jqplot.PieLegendRenderer.prototype.init = function(options) {

        // Group: Properties

        //

        // prop: numberRows

        // Maximum number of rows in the legend.  0 or null for unlimited.

        this.numberRows = null;

        // prop: numberColumns

        // Maximum number of columns in the legend.  0 or null for unlimited.

        this.numberColumns = null;

        $.extend(true, this, options);

    };

    // called with context of legend

    $.jqplot.PieLegendRenderer.prototype.draw = function() {

        var legend = this;

        if (this.show) {

            var series = this._series;

            this._elem = $(document.createElement('table'));

            this._elem.addClass('jqplot-table-legend');

            var ss = {position:'absolute'};

            if (this.background) {

                ss['background'] = this.background;

            }

            if (this.border) {

                ss['border'] = this.border;

            }

            if (this.fontSize) {

                ss['fontSize'] = this.fontSize;

            }

            if (this.fontFamily) {

                ss['fontFamily'] = this.fontFamily;

            }

            if (this.textColor) {

                ss['textColor'] = this.textColor;

            }

            if (this.marginTop != null) {

                ss['marginTop'] = this.marginTop;

            }

            if (this.marginBottom != null) {

                ss['marginBottom'] = this.marginBottom;

            }

            if (this.marginLeft != null) {

                ss['marginLeft'] = this.marginLeft;

            }

            if (this.marginRight != null) {

                ss['marginRight'] = this.marginRight;

            }

            this._elem.css(ss);

            // Pie charts legends don't go by number of series, but by number of data points

            // in the series.  Refactor things here for that.

            var pad = false,

                reverse = false,

                nr,

                nc;

            var s = series[0];

            var colorGenerator = new $.jqplot.ColorGenerator(s.seriesColors);

            if (s.show) {

                var pd = s.data;

                if (this.numberRows) {

                    nr = this.numberRows;

                    if (!this.numberColumns){

                        nc = Math.ceil(pd.length/nr);

                    }

                    else{

                        nc = this.numberColumns;

                    }

                }

                else if (this.numberColumns) {

                    nc = this.numberColumns;

                    nr = Math.ceil(pd.length/this.numberColumns);

                }

                else {

                    nr = pd.length;

                    nc = 1;

                }

                var i, j;

                var tr, td1, td2;

                var lt, rs, color;

                var idx = 0;

                var div0, div1;

                for (i=0; i<nr; i++) {

                    tr = $(document.createElement('tr'));

                    tr.addClass('jqplot-table-legend');

                    if (reverse){

                        tr.prependTo(this._elem);

                    }

                    else{

                        tr.appendTo(this._elem);

                    }

                    for (j=0; j<nc; j++) {

                        if (idx < pd.length){

                            lt = this.labels[idx] || pd[idx][0].toString();

                            color = colorGenerator.next();

                            if (!reverse){

                                if (i>0){

                                    pad = true;

                                }

                                else{

                                    pad = false;

                                }

                            }

                            else{

                                if (i == nr -1){

                                    pad = false;

                                }

                                else{

                                    pad = true;

                                }

                            }

                            rs = (pad) ? this.rowSpacing : '0';

                            td1 = $(document.createElement('td'));

                            td1.addClass('jqplot-table-legend jqplot-table-legend-swatch');

                            td1.css({textAlign: 'center', paddingTop: rs});

                            div0 = $(document.createElement('div'));

                            div0.addClass('jqplot-table-legend-swatch-outline');

                            div1 = $(document.createElement('div'));

                            div1.addClass('jqplot-table-legend-swatch');

                            div1.css({backgroundColor: color, borderColor: color});

                            td1.append(div0.append(div1));

                            td2 = $(document.createElement('td'));

                            td2.addClass('jqplot-table-legend jqplot-table-legend-label');

                            td2.css('paddingTop', rs);

                            if (this.escapeHtml){

                                td2.text(lt);

                            }

                            else {

                                td2.html(lt);

                            }

                            if (reverse) {

                                td2.prependTo(tr);

                                td1.prependTo(tr);

                            }

                            else {

                                td1.appendTo(tr);

                                td2.appendTo(tr);

                            }

                            pad = true;

                        }

                        idx++;

                    }

                }

            }

        }

        return this._elem;

    };

    $.jqplot.PieRenderer.prototype.handleMove = function(ev, gridpos, datapos, neighbor, plot) {

        if (neighbor) {

            var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];

            plot.target.trigger('jqplotDataMouseOver', ins);

            if (plot.series[ins[0]].highlightMouseOver && !(ins[0] == plot.plugins.pieRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {

                plot.target.trigger('jqplotDataHighlight', ins);

                highlight (plot, ins[0], ins[1]);

            }

        }

        else if (neighbor == null) {

            unhighlight (plot);

        }

    };

    // this.eventCanvas._elem.bind($.jqplot.eventListenerHooks[i][0], {plot:this}, $.jqplot.eventListenerHooks[i][1]);

    // setup default renderers for axes and legend so user doesn't have to

    // called with scope of plot

    function preInit(target, data, options) {

        options = options || {};

        options.axesDefaults = options.axesDefaults || {};

        options.legend = options.legend || {};

        options.seriesDefaults = options.seriesDefaults || {};

        // only set these if there is a pie series

        var setopts = false;

        if (options.seriesDefaults.renderer == $.jqplot.PieRenderer) {

            setopts = true;

        }

        else if (options.series) {

            for (var i=0; i < options.series.length; i++) {

                if (options.series[i].renderer == $.jqplot.PieRenderer) {

                    setopts = true;

                }

            }

        }

        if (setopts) {

            options.axesDefaults.renderer = $.jqplot.PieAxisRenderer;

            options.legend.renderer = $.jqplot.PieLegendRenderer;

            options.legend.preDraw = true;

            options.seriesDefaults.pointLabels = {show: false};

        }

    }

    function postInit(target, data, options) {

        for (var i=0; i<this.series.length; i++) {

            if (this.series[i].renderer.constructor == $.jqplot.PieRenderer) {

                // don't allow mouseover and mousedown at same time.

                if (this.series[i].highlightMouseOver) {

                    this.series[i].highlightMouseDown = false;

                }

            }

        }

    }

    // called with scope of plot

    function postParseOptions(options) {

        for (var i=0; i<this.series.length; i++) {

            this.series[i].seriesColors = this.seriesColors;

            this.series[i].colorGenerator = $.jqplot.colorGenerator;

        }

    }

    function highlight (plot, sidx, pidx) {

        var s = plot.series[sidx];

        var canvas = plot.plugins.pieRenderer.highlightCanvas;

        canvas._ctx.clearRect(0,0,canvas._ctx.canvas.width, canvas._ctx.canvas.height);

        s._highlightedPoint = pidx;

        plot.plugins.pieRenderer.highlightedSeriesIndex = sidx;

        s.renderer.drawSlice.call(s, canvas._ctx, s._sliceAngles[pidx][0], s._sliceAngles[pidx][1], s.highlightColorGenerator.get(pidx), false);

    }

    function unhighlight (plot) {

        var canvas = plot.plugins.pieRenderer.highlightCanvas;

        canvas._ctx.clearRect(0,0, canvas._ctx.canvas.width, canvas._ctx.canvas.height);

        for (var i=0; i<plot.series.length; i++) {

            plot.series[i]._highlightedPoint = null;

        }

        plot.plugins.pieRenderer.highlightedSeriesIndex = null;

        plot.target.trigger('jqplotDataUnhighlight');

    }

    function handleMove(ev, gridpos, datapos, neighbor, plot) {

        if (neighbor) {

            var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];

            var evt1 = jQuery.Event('jqplotDataMouseOver');

            evt1.pageX = ev.pageX;

            evt1.pageY = ev.pageY;

            plot.target.trigger(evt1, ins);

            if (plot.series[ins[0]].highlightMouseOver && !(ins[0] == plot.plugins.pieRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {

                var evt = jQuery.Event('jqplotDataHighlight');

                evt.which = ev.which;

                evt.pageX = ev.pageX;

                evt.pageY = ev.pageY;

                plot.target.trigger(evt, ins);

                highlight (plot, ins[0], ins[1]);

            }

        }

        else if (neighbor == null) {

            unhighlight (plot);

        }

    }

    function handleMouseDown(ev, gridpos, datapos, neighbor, plot) {

        if (neighbor) {

            var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];

            if (plot.series[ins[0]].highlightMouseDown && !(ins[0] == plot.plugins.pieRenderer.highlightedSeriesIndex && ins[1] == plot.series[ins[0]]._highlightedPoint)) {

                var evt = jQuery.Event('jqplotDataHighlight');

                evt.which = ev.which;

                evt.pageX = ev.pageX;

                evt.pageY = ev.pageY;

                plot.target.trigger(evt, ins);

                highlight (plot, ins[0], ins[1]);

            }

        }

        else if (neighbor == null) {

            unhighlight (plot);

        }

    }

    function handleMouseUp(ev, gridpos, datapos, neighbor, plot) {

        var idx = plot.plugins.pieRenderer.highlightedSeriesIndex;

        if (idx != null && plot.series[idx].highlightMouseDown) {

            unhighlight(plot);

        }

    }

    function handleClick(ev, gridpos, datapos, neighbor, plot) {

        if (neighbor) {

            var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];

            var evt = jQuery.Event('jqplotDataClick');

            evt.which = ev.which;

            evt.pageX = ev.pageX;

            evt.pageY = ev.pageY;

            plot.target.trigger(evt, ins);

        }

    }

    function handleRightClick(ev, gridpos, datapos, neighbor, plot) {

        if (neighbor) {

            var ins = [neighbor.seriesIndex, neighbor.pointIndex, neighbor.data];

            var idx = plot.plugins.pieRenderer.highlightedSeriesIndex;

            if (idx != null && plot.series[idx].highlightMouseDown) {

                unhighlight(plot);

            }

            var evt = jQuery.Event('jqplotDataRightClick');

            evt.which = ev.which;

            evt.pageX = ev.pageX;

            evt.pageY = ev.pageY;

            plot.target.trigger(evt, ins);

        }

    }

    // called within context of plot

    // create a canvas which we can draw on.

    // insert it before the eventCanvas, so eventCanvas will still capture events.

    function postPlotDraw() {

        // Memory Leaks patch

        if (this.plugins.pieRenderer && this.plugins.pieRenderer.highlightCanvas) {

            this.plugins.pieRenderer.highlightCanvas.resetCanvas();

            this.plugins.pieRenderer.highlightCanvas = null;

        }

        this.plugins.pieRenderer = {highlightedSeriesIndex:null};

        this.plugins.pieRenderer.highlightCanvas = new $.jqplot.GenericCanvas();

        // do we have any data labels?  if so, put highlight canvas before those

        var labels = $(this.targetId+' .jqplot-data-label');

        if (labels.length) {

            $(labels[0]).before(this.plugins.pieRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-pieRenderer-highlight-canvas', this._plotDimensions, this));

        }

        // else put highlight canvas before event canvas.

        else {

            this.eventCanvas._elem.before(this.plugins.pieRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-pieRenderer-highlight-canvas', this._plotDimensions, this));

        }

        var hctx = this.plugins.pieRenderer.highlightCanvas.setContext();

        this.eventCanvas._elem.bind('mouseleave', {plot:this}, function (ev) { unhighlight(ev.data.plot); });

    }

    $.jqplot.preInitHooks.push(preInit);

    $.jqplot.PieTickRenderer = function() {

        $.jqplot.AxisTickRenderer.call(this);

    };

    $.jqplot.PieTickRenderer.prototype = new $.jqplot.AxisTickRenderer();

    $.jqplot.PieTickRenderer.prototype.constructor = $.jqplot.PieTickRenderer;

})(jQuery);