Subversion-Projekte lars-tiefland.cienc

/**

 * 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.FunnelRenderer

     * Plugin renderer to draw a funnel chart.

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

     * y values give area size.

     *

     * Funnel charts will draw a single series

     * only.

     *

     * To use this renderer, you need to include the

     * funnel renderer plugin, for example:

     *

     * > <script type="text/javascript" src="plugins/jqplot.funnelRenderer.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.FunnelRenderer,

     * >         rendererOptions:{

     * >              sectionMargin: 12,

     * >              widthRatio: 0.3

     * >          }

     * >      }

     * > });

     *

     * IMPORTANT

     *

     * *The funnel renderer will reorder data in descending order* so the largest value in

     * the data set is first and displayed on top of the funnel.  Data will then

     * be displayed in descending order down the funnel.  The area of each funnel

     * section will correspond to the value of each data point relative to the sum

     * of all values.  That is section area is proportional to section value divided by

     * sum of all section values.

     *

     * If your data is not in descending order when passed into the plot, *it will be

     * reordered* when stored in the series.data property.  A copy of the unordered

     * data is kept in the series._unorderedData property.

     *

     * A funnel plot will trigger events on the plot target

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

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

     * the appropriate section. *Note* the point index will referr to the ordered

     * data, not the original unordered data.

     *

     * 'jqplotDataMouseOver' - triggered when mousing over a section.

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

     * if highlighting is enabled.

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

     * a highlighted section.

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

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

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

     */

    $.jqplot.FunnelRenderer = function(){

        $.jqplot.LineRenderer.call(this);

    };

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

    $.jqplot.FunnelRenderer.prototype.constructor = $.jqplot.FunnelRenderer;

    // called with scope of a series

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

        // Group: Properties

        //

        // prop: padding

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

        this.padding = {top: 20, right: 20, bottom: 20, left: 20};

        // prop: sectionMargin

        // spacing between funnel sections in pixels.

        this.sectionMargin = 6;

        // prop: fill

        // true or false, whether to fill the areas.

        this.fill = true;

        // prop: shadowOffset

        // offset of the shadow from the area 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 area when moused over.

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

        this.highlightMouseOver = true;

        // prop: highlightMouseDown

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

        // This will be disabled if highlightMouseOver is true.

        this.highlightMouseDown = false;

        // prop: highlightColors

        // array of colors to use when highlighting an area.

        this.highlightColors = [];

        // prop: widthRatio

        // The ratio of the width of the top of the funnel to the bottom.

        // a ratio of 0 will make an upside down pyramid.

        this.widthRatio = 0.2;

        // prop: lineWidth

        // width of line if areas are stroked and not filled.

        this.lineWidth = 2;

        // 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;

        this._type = 'funnel';

        this.tickRenderer = $.jqplot.FunnelTickRenderer;

        // 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);

        // index of the currenty highlighted point, if any

        this._highlightedPoint = null;

        // lengths of bases, or horizontal sides of areas of trapezoid.

        this._bases = [];

        // total area

        this._atot;

        // areas of segments.

        this._areas = [];

        // vertical lengths of segments.

        this._lengths = [];

        // angle of the funnel to vertical.

        this._angle;

        this._dataIndices = [];

        // sort data

        this._unorderedData = $.extend(true, [], this.data);

        var idxs = $.extend(true, [], this.data);

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

            idxs[i].push(i);

        }

        this.data.sort( function (a, b) { return b[1] - a[1]; } );

        idxs.sort( function (a, b) { return b[1] - a[1]; });

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

            this._dataIndices.push(idxs[i][2]);

        }

        // 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] + 0.4 * (255 - newrgb[j]);

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

                }

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

            }

        }

        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);

    };

    // gridData will be of form [label, percentage of total]

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

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

        var sum = 0;

        var td = [];

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

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

            td.push([this.data[i][0], this.data[i][1]]);

        }

        // normalize y values, so areas are proportional.

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

            td[i][1] = td[i][1]/sum;

        }

        this._bases = new Array(td.length + 1);

        this._lengths = new Array(td.length);

        this.gridData = td;

    };

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

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

        var sum = 0;

        var td = [];

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

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

            td.push([this.data[i][0], this.data[i][1]]);

        }

        // normalize y values, so areas are proportional.

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

            td[i][1] = td[i][1]/sum;

        }

        this._bases = new Array(td.length + 1);

        this._lengths = new Array(td.length);

        return td;

    };

    $.jqplot.FunnelRenderer.prototype.drawSection = function (ctx, vertices, color, isShadow) {

        var fill = this.fill;

        var lineWidth = this.lineWidth;

        ctx.save();

        if (isShadow) {

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

                ctx.save();

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

                doDraw();

            }

        }

        else {

            doDraw();

        }

        function doDraw () {

            ctx.beginPath();

            ctx.fillStyle = color;

            ctx.strokeStyle = color;

            ctx.lineWidth = lineWidth;

            ctx.moveTo(vertices[0][0], vertices[0][1]);

            for (var i=1; i<4; i++) {

                ctx.lineTo(vertices[i][0], vertices[i][1]);

            }

            ctx.closePath();

            if (fill) {

                ctx.fill();

            }

            else {

                ctx.stroke();

            }

        }

        if (isShadow) {

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

                ctx.restore();

            }

        }

        ctx.restore();

    };

    // called with scope of series

    $.jqplot.FunnelRenderer.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;

        this._areas = [];

        // var colorGenerator = new this.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 loff = (trans==1) ? this.padding.left + offx : this.padding.left;

        var toff = (trans==1) ? this.padding.top + offy : this.padding.top;

        var roff = (trans==-1) ? this.padding.right + offx : this.padding.right;

        var boff = (trans==-1) ? this.padding.bottom + offy : this.padding.bottom;

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

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

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

        var cw = ctx.canvas.width;

        var ch = ctx.canvas.height;

        this._bases[0] = cw - loff - roff;

        var ltot = this._length = ch - toff - boff;

        var hend = this._bases[0]*this.widthRatio;

        this._atot = ltot/2 * (this._bases[0] + this._bases[0]*this.widthRatio);

        this._angle = Math.atan((this._bases[0] - hend)/2/ltot);

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

            this._areas.push(gd[i][1] * this._atot);

        }

        var guess, err, count, lsum=0;

        var tolerance = 0.0001;

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

            guess = this._areas[i]/this._bases[i];

            err = 999999;

            this._lengths[i] = guess;

            count = 0;

            while (err > this._lengths[i]*tolerance && count < 100) {

                this._lengths[i] = this._areas[i]/(this._bases[i] - this._lengths[i] * Math.tan(this._angle));

                err = Math.abs(this._lengths[i] - guess);

                this._bases[i+1] = this._bases[i] - (2*this._lengths[i]*Math.tan(this._angle));

                guess = this._lengths[i];

                count++;

            }

            lsum += this._lengths[i];

        }

        // figure out vertices of each section

        this._vertices = new Array(gd.length);

        // these are 4 coners of entire trapezoid

        var p0 = [loff, toff],

            p1 = [loff+this._bases[0], toff],

            p2 = [loff + (this._bases[0] - this._bases[this._bases.length-1])/2, toff + this._length],

            p3 = [p2[0] + this._bases[this._bases.length-1], p2[1]];

        // equations of right and left sides, returns x, y values given height of section (y value)

        function findleft (l) {

            var m = (p0[1] - p2[1])/(p0[0] - p2[0]);

            var b = p0[1] - m*p0[0];

            var y = l + p0[1];

            return [(y - b)/m, y];

        }

        function findright (l) {

            var m = (p1[1] - p3[1])/(p1[0] - p3[0]);

            var b = p1[1] - m*p1[0];

            var y = l + p1[1];

            return [(y - b)/m, y];

        }

        var x = offx, y = offy;

        var h=0, adj=0;

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

            this._vertices[i] = new Array();

            var v = this._vertices[i];

            var sm = this.sectionMargin;

            if (i == 0) {

                adj = 0;

            }

            if (i == 1) {

                adj = sm/3;

            }

            else if (i > 0 && i < gd.length-1) {

                adj = sm/2;

            }

            else if (i == gd.length -1) {

                adj = 2*sm/3;

            }

            v.push(findleft(h+adj));

            v.push(findright(h+adj));

            h += this._lengths[i];

            if (i == 0) {

                adj = -2*sm/3;

            }

            else if (i > 0 && i < gd.length-1) {

                adj = -sm/2;

            }

            else if (i == gd.length - 1) {

                adj = 0;

            }

            v.push(findright(h+adj));

            v.push(findleft(h+adj));

        }

        if (this.shadow) {

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

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

                this.renderer.drawSection.call (this, ctx, this._vertices[i], shadowColor, true);

            }

        }

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

            var v = this._vertices[i];

            this.renderer.drawSection.call (this, ctx, v, this.seriesColors[i]);

            if (this.showDataLabels && gd[i][1]*100 >= this.dataLabelThreshold) {

                var fstr, 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][1]*100);

                }

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

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

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

                }

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

                var x = (v[0][0] + v[1][0])/2 + this.canvas._offsets.left;

                var y = (v[1][1] + v[2][1])/2 + this.canvas._offsets.top;

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

                x -= labelelem.width()/2;

                y -= labelelem.height()/2;

                x = Math.round(x);

                y = Math.round(y);

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

            }

        }

    };

    $.jqplot.FunnelAxisRenderer = function() {

        $.jqplot.LinearAxisRenderer.call(this);

    };

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

    $.jqplot.FunnelAxisRenderer.prototype.constructor = $.jqplot.FunnelAxisRenderer;

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

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

    // called with scope of axis object.

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

        //

        this.tickRenderer = $.jqplot.FunnelTickRenderer;

        $.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;

    };

    /**

     * Class: $.jqplot.FunnelLegendRenderer

     * Legend Renderer specific to funnel plots.  Set by default

     * when the user creates a funnel plot.

     */

    $.jqplot.FunnelLegendRenderer = function(){

        $.jqplot.TableLegendRenderer.call(this);

    };

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

    $.jqplot.FunnelLegendRenderer.prototype.constructor = $.jqplot.FunnelLegendRenderer;

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

        var legend = this;

        if (this.show) {

            var series = this._series;

            var ss = 'position:absolute;';

            ss += (this.background) ? 'background:'+this.background+';' : '';

            ss += (this.border) ? 'border:'+this.border+';' : '';

            ss += (this.fontSize) ? 'font-size:'+this.fontSize+';' : '';

            ss += (this.fontFamily) ? 'font-family:'+this.fontFamily+';' : '';

            ss += (this.textColor) ? 'color:'+this.textColor+';' : '';

            ss += (this.marginTop != null) ? 'margin-top:'+this.marginTop+';' : '';

            ss += (this.marginBottom != null) ? 'margin-bottom:'+this.marginBottom+';' : '';

            ss += (this.marginLeft != null) ? 'margin-left:'+this.marginLeft+';' : '';

            ss += (this.marginRight != null) ? 'margin-right:'+this.marginRight+';' : '';

            this._elem = $('<table class="jqplot-table-legend" style="'+ss+'"></table>');

            // Funnel 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, tr, td1, td2, lt, rs, color;

                var idx = 0;

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

                    if (reverse){

                        tr = $('<tr class="jqplot-table-legend"></tr>').prependTo(this._elem);

                    }

                    else{

                        tr = $('<tr class="jqplot-table-legend"></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 = $('<td class="jqplot-table-legend" style="text-align:center;padding-top:'+rs+';">'+

                                '<div><div class="jqplot-table-legend-swatch" style="border-color:'+color+';"></div>'+

                                '</div></td>');

                            td2 = $('<td class="jqplot-table-legend" style="padding-top:'+rs+';"></td>');

                            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.FunnelLegendRenderer.prototype.pack = function(offsets) {

    //     if (this.show) {

    //         // fake a grid for positioning

    //         var grid = {_top:offsets.top, _left:offsets.left, _right:offsets.right, _bottom:this._plotDimensions.height - offsets.bottom};

    //         if (this.placement == 'insideGrid') {

    //             switch (this.location) {

    //                 case 'nw':

    //                     var a = grid._left + this.xoffset;

    //                     var b = grid._top + this.yoffset;

    //                     this._elem.css('left', a);

    //                     this._elem.css('top', b);

    //                     break;

    //                 case 'n':

    //                     var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;

    //                     var b = grid._top + this.yoffset;

    //                     this._elem.css('left', a);

    //                     this._elem.css('top', b);

    //                     break;

    //                 case 'ne':

    //                     var a = offsets.right + this.xoffset;

    //                     var b = grid._top + this.yoffset;

    //                     this._elem.css({right:a, top:b});

    //                     break;

    //                 case 'e':

    //                     var a = offsets.right + this.xoffset;

    //                     var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;

    //                     this._elem.css({right:a, top:b});

    //                     break;

    //                 case 'se':

    //                     var a = offsets.right + this.xoffset;

    //                     var b = offsets.bottom + this.yoffset;

    //                     this._elem.css({right:a, bottom:b});

    //                     break;

    //                 case 's':

    //                     var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;

    //                     var b = offsets.bottom + this.yoffset;

    //                     this._elem.css({left:a, bottom:b});

    //                     break;

    //                 case 'sw':

    //                     var a = grid._left + this.xoffset;

    //                     var b = offsets.bottom + this.yoffset;

    //                     this._elem.css({left:a, bottom:b});

    //                     break;

    //                 case 'w':

    //                     var a = grid._left + this.xoffset;

    //                     var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;

    //                     this._elem.css({left:a, top:b});

    //                     break;

    //                 default:  // same as 'se'

    //                     var a = grid._right - this.xoffset;

    //                     var b = grid._bottom + this.yoffset;

    //                     this._elem.css({right:a, bottom:b});

    //                     break;

    //             }

    //

    //         }

    //         else {

    //             switch (this.location) {

    //                 case 'nw':

    //                     var a = this._plotDimensions.width - grid._left + this.xoffset;

    //                     var b = grid._top + this.yoffset;

    //                     this._elem.css('right', a);

    //                     this._elem.css('top', b);

    //                     break;

    //                 case 'n':

    //                     var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;

    //                     var b = this._plotDimensions.height - grid._top + this.yoffset;

    //                     this._elem.css('left', a);

    //                     this._elem.css('bottom', b);

    //                     break;

    //                 case 'ne':

    //                     var a = this._plotDimensions.width - offsets.right + this.xoffset;

    //                     var b = grid._top + this.yoffset;

    //                     this._elem.css({left:a, top:b});

    //                     break;

    //                 case 'e':

    //                     var a = this._plotDimensions.width - offsets.right + this.xoffset;

    //                     var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;

    //                     this._elem.css({left:a, top:b});

    //                     break;

    //                 case 'se':

    //                     var a = this._plotDimensions.width - offsets.right + this.xoffset;

    //                     var b = offsets.bottom + this.yoffset;

    //                     this._elem.css({left:a, bottom:b});

    //                     break;

    //                 case 's':

    //                     var a = (offsets.left + (this._plotDimensions.width - offsets.right))/2 - this.getWidth()/2;

    //                     var b = this._plotDimensions.height - offsets.bottom + this.yoffset;

    //                     this._elem.css({left:a, top:b});

    //                     break;

    //                 case 'sw':

    //                     var a = this._plotDimensions.width - grid._left + this.xoffset;

    //                     var b = offsets.bottom + this.yoffset;

    //                     this._elem.css({right:a, bottom:b});

    //                     break;

    //                 case 'w':

    //                     var a = this._plotDimensions.width - grid._left + this.xoffset;

    //                     var b = (offsets.top + (this._plotDimensions.height - offsets.bottom))/2 - this.getHeight()/2;

    //                     this._elem.css({right:a, top:b});

    //                     break;

    //                 default:  // same as 'se'

    //                     var a = grid._right - this.xoffset;

    //                     var b = grid._bottom + this.yoffset;

    //                     this._elem.css({right:a, bottom:b});

    //                     break;

    //             }

    //         }

    //     }

    // };

    // 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 funnel series

        var setopts = false;

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

            setopts = true;

        }

        else if (options.series) {

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

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

                    setopts = true;

                }

            }

        }

        if (setopts) {

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

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

            options.legend.preDraw = true;

            options.sortData = false;

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

        }

    }

    function postInit(target, data, options) {

        // if multiple series, add a reference to the previous one so that

        // funnel rings can nest.

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

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

                // 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.funnelRenderer.highlightCanvas;

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

        s._highlightedPoint = pidx;

        plot.plugins.funnelRenderer.highlightedSeriesIndex = sidx;

        s.renderer.drawSection.call(s, canvas._ctx, s._vertices[pidx], s.highlightColors[pidx], false);

    }

    function unhighlight (plot) {

        var canvas = plot.plugins.funnelRenderer.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.funnelRenderer.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.funnelRenderer.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.funnelRenderer.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.funnelRenderer.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.funnelRenderer.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.funnelRenderer && this.plugins.funnelRenderer.highlightCanvas) {

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

            this.plugins.funnelRenderer.highlightCanvas = null;

        }

        this.plugins.funnelRenderer = {};

        this.plugins.funnelRenderer.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.funnelRenderer.highlightCanvas.createElement(this._gridPadding, 'jqplot-funnelRenderer-highlight-canvas', this._plotDimensions, this));

        }

        // else put highlight canvas before event canvas.

        else {

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

        }

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

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

    }

    $.jqplot.preInitHooks.push(preInit);

    $.jqplot.FunnelTickRenderer = function() {

        $.jqplot.AxisTickRenderer.call(this);

    };

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

    $.jqplot.FunnelTickRenderer.prototype.constructor = $.jqplot.FunnelTickRenderer;

})(jQuery);