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Current File : /var/www/html/ouvidoria/cmbeberibe/js/RGraph/libraries/RGraph.rscatter.js
// version: 2014-08-16
/**
 * o--------------------------------------------------------------------------------o
 * | This file is part of the RGraph package - you can learn more at:               |
 * |                                                                                |
 * |                          http://www.rgraph.net                                 |
 * |                                                                                |
 * | This package is licensed under the Creative Commons BY-NC license. That means  |
 * | that for non-commercial purposes it's free to use and for business use there's |
 * | a 99 GBP per-company fee to pay. You can read the full license here:           |
 * |                                                                                |
 * |                      http://www.rgraph.net/license                             |
 * o--------------------------------------------------------------------------------o
 */

RGraph = window.RGraph || {isRGraph: true};

/**
 * The chart constuctor
 *
 * @param object canvas
 * @param array data
 */
RGraph.RScatter =
    RGraph.Rscatter = function (conf) {
        /**
         * Allow for object config style
         */
        if (typeof conf === 'object'
            && typeof conf.data === 'object'
            && typeof conf.id === 'string') {

            var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)

            this.data = new Array(conf.data.length);

            // Store the data set(s)
            this.data = RGraph.arrayClone(conf.data);


            // Account for just one dataset being given
            if (typeof conf.data === 'object' && typeof conf.data[0] === 'object' && typeof conf.data[0][0] === 'number') {
                var tmp = RGraph.arrayClone(conf.data);
                conf.data = new Array();
                conf.data[0] = RGraph.arrayClone(tmp);

                this.data = RGraph.arrayClone(conf.data);
            }

        } else {

            var conf = {id: conf};
            conf.data = arguments[1];


            this.data = [];

            // Handle multiple datasets being given as one argument
            if (arguments[1][0] && arguments[1][0][0] && typeof arguments[1][0][0] == 'object') {
                // Store the data set(s)
                for (var i = 0; i < arguments[1].length; ++i) {
                    this.data[i] = arguments[1][i];
                }

                // Handle multiple data sets being supplied as seperate arguments
            } else {

                // Store the data set(s)
                for (var i = 1; i < arguments.length; ++i) {
                    this.data[i - 1] = RGraph.array_clone(arguments[i]);
                }
            }
        }


        this.id = conf.id
        this.canvas = document.getElementById(this.id)
        this.context = this.canvas.getContext ? this.canvas.getContext("2d") : null;
        this.canvas.__object__ = this;
        this.type = 'rscatter';
        this.hasTooltips = false;
        this.isRGraph = true;
        this.uid = RGraph.CreateUID();
        this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();
        this.colorsParsed = false;
        this.coordsText = [];
        this.original_colors = [];
        this.firstDraw = true; // After the first draw this will be false


        /**
         * Compatibility with older browsers
         */
            //RGraph.OldBrowserCompat(this.context);


        this.centerx = 0;
        this.centery = 0;
        this.radius = 0;
        this.max = 0;

        this.properties =
        {
            'chart.radius': null,
            'chart.colors': [], // This is used internally for the key
            'chart.colors.default': 'black',
            'chart.gutter.left': 25,
            'chart.gutter.right': 25,
            'chart.gutter.top': 25,
            'chart.gutter.bottom': 25,
            'chart.title': '',
            'chart.title.background': null,
            'chart.title.hpos': null,
            'chart.title.vpos': null,
            'chart.title.bold': true,
            'chart.title.font': null,
            'chart.title.x': null,
            'chart.title.y': null,
            'chart.title.halign': null,
            'chart.title.valign': null,
            'chart.labels': null,
            'chart.labels.position': 'center',
            'chart.labels.axes': 'nsew',
            'chart.text.color': 'black',
            'chart.text.font': 'Arial',
            'chart.text.size': 10,
            'chart.key': null,
            'chart.key.background': 'white',
            'chart.key.position': 'graph',
            'chart.key.halign': 'right',
            'chart.key.shadow': false,
            'chart.key.shadow.color': '#666',
            'chart.key.shadow.blur': 3,
            'chart.key.shadow.offsetx': 2,
            'chart.key.shadow.offsety': 2,
            'chart.key.position.gutter.boxed': false,
            'chart.key.position.x': null,
            'chart.key.position.y': null,
            'chart.key.color.shape': 'square',
            'chart.key.rounded': true,
            'chart.key.linewidth': 1,
            'chart.key.colors': null,
            'chart.key.interactive': false,
            'chart.key.interactive.highlight.chart.fill': 'rgba(255,0,0,0.9)',
            'chart.key.interactive.highlight.label': 'rgba(255,0,0,0.2)',
            'chart.key.text.color': 'black',
            'chart.contextmenu': null,
            'chart.tooltips': null,
            'chart.tooltips.event': 'onmousemove',
            'chart.tooltips.effect': 'fade',
            'chart.tooltips.css.class': 'RGraph_tooltip',
            'chart.tooltips.highlight': true,
            'chart.tooltips.hotspot': 3,
            'chart.tooltips.coords.page': false,
            'chart.annotatable': false,
            'chart.annotate.color': 'black',
            'chart.zoom.factor': 1.5,
            'chart.zoom.fade.in': true,
            'chart.zoom.fade.out': true,
            'chart.zoom.hdir': 'right',
            'chart.zoom.vdir': 'down',
            'chart.zoom.frames': 25,
            'chart.zoom.delay': 16.666,
            'chart.zoom.shadow': true,
            'chart.zoom.background': true,
            'chart.zoom.action': 'zoom',
            'chart.resizable': false,
            'chart.resize.handle.background': null,
            'chart.ymax': null,
            'chart.ymin': 0,
            'chart.tickmarks': 'cross',
            'chart.ticksize': 3,
            'chart.scale.decimals': null,
            'chart.scale.point': '.',
            'chart.scale.thousand': ',',
            'chart.scale.round': false,
            'chart.units.pre': '',
            'chart.units.post': '',
            'chart.events.mousemove': null,
            'chart.events.click': null,
            'chart.highlight.stroke': 'transparent',
            'chart.highlight.fill': 'rgba(255,255,255,0.7)',
            'chart.highlight.point.radius': 3,
            'chart.labels.count': 5
        }


        /**
         * Create the $ objects so that functions can be added to them
         */

        for (var i = 0, idx = 0; i < this.data.length; ++i) {
            for (var j = 0, len = this.data[i].length; j < len; j += 1, idx += 1) {
                this['$' + idx] = {}
            }
        }


        /**
         * Translate half a pixel for antialiasing purposes - but only if it hasn't beeen
         * done already
         */
        if (!this.canvas.__rgraph_aa_translated__) {
            this.context.translate(0.5, 0.5);

            this.canvas.__rgraph_aa_translated__ = true;
        }


        // Short variable names
        var RG = RGraph;
        var ca = this.canvas;
        var co = ca.getContext('2d');
        var prop = this.properties;
        var jq = jQuery;
        var pa = RG.Path;
        var win = window;
        var doc = document;
        var ma = Math;


        /**
         * "Decorate" the object with the generic effects if the effects library has been included
         */
        if (RG.Effects && typeof RG.Effects.decorate === 'function') {
            RG.Effects.decorate(this);
        }


        /**
         * A simple setter
         *
         * @param string name  The name of the property to set
         * @param string value The value of the property
         */
        this.set =
            this.Set = function (name, value) {
                var value = typeof arguments[1] === 'undefined' ? null : arguments[1];

                /**
                 * the number of arguments is only one and it's an
                 * object - parse it for configuration data and return.
                 */
                if (arguments.length === 1 && typeof name === 'object') {
                    RG.parseObjectStyleConfig(this, name);
                    return this;
                }


                /**
                 * This should be done first - prepend the property name with "chart." if necessary
                 */
                if (name.substr(0, 6) != 'chart.') {
                    name = 'chart.' + name;
                }
                prop[name.toLowerCase()] = value;

                return this;
            };


        /**
         * A simple getter
         *
         * @param string name The name of the property to get
         */
        this.get =
            this.Get = function (name) {
                /**
                 * This should be done first - prepend the property name with "chart." if necessary
                 */
                if (name.substr(0, 6) != 'chart.') {
                    name = 'chart.' + name;
                }

                return prop[name.toLowerCase()];
            };


        /**
         * This method draws the rose chart
         */
        this.draw =
            this.Draw = function () {
                /**
                 * Fire the onbeforedraw event
                 */
                RG.FireCustomEvent(this, 'onbeforedraw');


                /**
                 * This doesn't affect the chart, but is used for compatibility
                 */
                this.gutterLeft = prop['chart.gutter.left'];
                this.gutterRight = prop['chart.gutter.right'];
                this.gutterTop = prop['chart.gutter.top'];
                this.gutterBottom = prop['chart.gutter.bottom'];

                // Calculate the radius
                this.radius = (Math.min(ca.width - this.gutterLeft - this.gutterRight, ca.height - this.gutterTop - this.gutterBottom) / 2);
                this.centerx = ((ca.width - this.gutterLeft - this.gutterRight) / 2) + this.gutterLeft;
                this.centery = ((ca.height - this.gutterTop - this.gutterBottom) / 2) + this.gutterTop;
                this.coords = [];
                this.coords2 = [];


                /**
                 * Stop this growing uncontrollably
                 */
                this.coordsText = [];


                /**
                 * If there's a user specified radius/centerx/centery, use them
                 */
                if (typeof(prop['chart.centerx']) == 'number') this.centerx = prop['chart.centerx'];
                if (typeof(prop['chart.centery']) == 'number') this.centery = prop['chart.centery'];
                if (typeof(prop['chart.radius']) == 'number') this.radius = prop['chart.radius'];


                /**
                 * Parse the colors for gradients. Its down here so that the center X/Y can be used
                 */
                if (!this.colorsParsed) {

                    this.parseColors();

                    // Don't want to do this again
                    this.colorsParsed = true;
                }


                /**
                 * Work out the scale
                 */
                var max = prop['chart.ymax'];
                var min = prop['chart.ymin'];

                if (typeof(max) == 'number') {
                    this.max = max;
                    this.scale2 = RG.getScale2(this, {
                        'max': max,
                        'min': min,
                        'strict': true,
                        'scale.decimals': Number(prop['chart.scale.decimals']),
                        'scale.point': prop['chart.scale.point'],
                        'scale.thousand': prop['chart.scale.thousand'],
                        'scale.round': prop['chart.scale.round'],
                        'units.pre': prop['chart.units.pre'],
                        'units.post': prop['chart.units.post'],
                        'ylabels.count': prop['chart.labels.count']
                    });
                } else {

                    for (var i = 0; i < this.data.length; i += 1) {
                        for (var j = 0, len = this.data[i].length; j < len; j += 1) {
                            this.max = Math.max(this.max, this.data[i][j][1]);
                        }
                    }

                    this.min = prop['chart.ymin'];

                    this.scale2 = RG.getScale2(this, {
                        'max': this.max,
                        'min': min,
                        'scale.decimals': Number(prop['chart.scale.decimals']),
                        'scale.point': prop['chart.scale.point'],
                        'scale.thousand': prop['chart.scale.thousand'],
                        'scale.round': prop['chart.scale.round'],
                        'units.pre': prop['chart.units.pre'],
                        'units.post': prop['chart.units.post'],
                        'ylabels.count': prop['chart.labels.count']
                    });
                    this.max = this.scale2.max;
                }

                /**
                 * Change the centerx marginally if the key is defined
                 */
                if (prop['chart.key'] && prop['chart.key'].length > 0 && prop['chart.key'].length >= 3) {
                    this.centerx = this.centerx - prop['chart.gutter.right'] + 5;
                }

                /**
                 * Populate the colors array for the purposes of generating the key
                 */
                if (typeof(prop['chart.key']) == 'object' && RG.is_array(prop['chart.key']) && prop['chart.key'][0]) {

                    // Reset the colors array
                    prop['chart.colors'] = [];

                    for (var i = 0; i < this.data.length; i += 1) {
                        for (var j = 0, len = this.data[i].length; j < len; j += 1) {
                            if (typeof this.data[i][j][2] == 'string') {
                                prop['chart.colors'].push(this.data[i][j][2]);
                            }
                        }
                    }
                }


                /**
                 * Populate the chart.tooltips array
                 */
                this.Set('chart.tooltips', []);

                for (var i = 0; i < this.data.length; i += 1) {
                    for (var j = 0, len = this.data[i].length; j < len; j += 1) {
                        if (typeof this.data[i][j][3] == 'string') {
                            prop['chart.tooltips'].push(this.data[i][j][3]);
                        }
                    }
                }


                // This resets the chart drawing state
                co.beginPath();

                this.DrawBackground();
                this.DrawRscatter();
                this.DrawLabels();

                /**
                 * Setup the context menu if required
                 */
                if (prop['chart.contextmenu']) {
                    RG.ShowContext(this);
                }


                // Draw the title if any has been set
                if (prop['chart.title']) {
                    RG.DrawTitle(this,
                        prop['chart.title'],
                        this.centery - this.radius - 10,
                        this.centerx,
                        prop['chart.title.size'] ? prop['chart.title.size'] : prop['chart.text.size'] + 2);
                }


                /**
                 * This function enables resizing
                 */
                if (prop['chart.resizable']) {
                    RG.AllowResizing(this);
                }


                /**
                 * This installs the event listeners
                 */
                RG.InstallEventListeners(this);


                /**
                 * Fire the onfirstdraw event
                 */
                if (this.firstDraw) {
                    RG.fireCustomEvent(this, 'onfirstdraw');
                    this.firstDraw = false;
                    this.firstDrawFunc();
                }


                /**
                 * Fire the RGraph ondraw event
                 */
                RG.FireCustomEvent(this, 'ondraw');


                return this;
            };


        /**
         * This method draws the rscatter charts background
         */
        this.drawBackground =
            this.DrawBackground = function () {
                co.lineWidth = 1;


                // Draw the background grey circles
                co.strokeStyle = '#ccc'; // TODO Use a property here - eg chart.background.circles.color
                // Radius must be greater than 0 for Opera to work
                var r = this.radius / 10;
                for (var i = 0, len = this.radius; i <= len; i += r) {
                    //co.moveTo(this.centerx + i, this.centery);

                    // Radius must be greater than 0 for Opera to work
                    co.arc(this.centerx, this.centery, i, 0, RG.TWOPI, 0);
                }
                co.stroke();


                // Draw the background lines that go from the center outwards
                co.beginPath();
                for (var i = 15; i < 360; i += 15) {

                    // Radius must be greater than 0 for Opera to work
                    co.arc(this.centerx, this.centery, this.radius, i / (180 / RG.PI), (i + 0.01) / (180 / RG.PI), 0);

                    co.lineTo(this.centerx, this.centery);
                }
                co.stroke();


                co.beginPath();
                co.strokeStyle = 'black';

                // Draw the X axis
                co.moveTo(this.centerx - this.radius, Math.round(this.centery));
                co.lineTo(this.centerx + this.radius, Math.round(this.centery));

                // Draw the X ends
                co.moveTo(Math.round(this.centerx - this.radius), this.centery - 5);
                co.lineTo(Math.round(this.centerx - this.radius), this.centery + 5);
                co.moveTo(Math.round(this.centerx + this.radius), this.centery - 5);
                co.lineTo(Math.round(this.centerx + this.radius), this.centery + 5);

                // Draw the X check marks
                for (var i = (this.centerx - this.radius); i < (this.centerx + this.radius); i += (this.radius / 10)) {
                    co.moveTo(Math.round(i), this.centery - 3);
                    co.lineTo(Math.round(i), this.centery + 3);
                }

                // Draw the Y check marks
                for (var i = (this.centery - this.radius); i < (this.centery + this.radius); i += (this.radius / 10)) {
                    co.moveTo(this.centerx - 3, Math.round(i));
                    co.lineTo(this.centerx + 3, Math.round(i));
                }

                // Draw the Y axis
                co.moveTo(Math.round(this.centerx), this.centery - this.radius);
                co.lineTo(Math.round(this.centerx), this.centery + this.radius);

                // Draw the Y ends
                co.moveTo(this.centerx - 5, Math.round(this.centery - this.radius));
                co.lineTo(this.centerx + 5, Math.round(this.centery - this.radius));

                co.moveTo(this.centerx - 5, Math.round(this.centery + this.radius));
                co.lineTo(this.centerx + 5, Math.round(this.centery + this.radius));

                // Stroke it
                co.closePath();
                co.stroke();
            };


        /**
         * This method draws a set of data on the graph
         */
        this.drawRscatter =
            this.DrawRscatter = function () {
                for (var dataset = 0; dataset < this.data.length; dataset += 1) {

                    var data = this.data[dataset];
                    this.coords2[dataset] = [];

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

                        var d1 = data[i][0];
                        var d2 = data[i][1];
                        var a = d1 / (180 / RG.PI); // RADIANS
                        var r = ( (d2 - prop['chart.ymin']) / (this.scale2.max - this.scale2.min) ) * this.radius;
                        var x = Math.sin(a) * r;
                        var y = Math.cos(a) * r;
                        var color = data[i][2] ? data[i][2] : prop['chart.colors.default'];
                        var tooltip = data[i][3] ? data[i][3] : null;

                        if (tooltip && String(tooltip).length) {
                            this.hasTooltips = true;
                        }

                        /**
                         * Account for the correct quadrant
                         */
                        x = x + this.centerx;
                        y = this.centery - y;


                        this.DrawTick(x, y, color);

                        // Populate the coords array with the coordinates and the tooltip
                        this.coords.push([x, y, color, tooltip]);
                        this.coords2[dataset].push([x, y, color, tooltip]);
                    }
                }
            };


        /**
         * Unsuprisingly, draws the labels
         */
        this.drawLabels =
            this.DrawLabels = function () {
                co.lineWidth = 1;

                // Default the color to black
                co.fillStyle = 'black';
                co.strokeStyle = 'black';

                var key = prop['chart.key'];
                var r = this.radius;
                var color = prop['chart.text.color'];
                var font = prop['chart.text.font'];
                var size = prop['chart.text.size'];
                var axes = prop['chart.labels.axes'].toLowerCase();
                var units_pre = prop['chart.units.pre'];
                var units_post = prop['chart.units.post'];
                var decimals = prop['chart.scale.decimals'];
                var centerx = this.centerx;
                var centery = this.centery;

                co.fillStyle = prop['chart.text.color'];

                // Draw any labels
                if (typeof prop['chart.labels'] == 'object' && prop['chart.labels']) {
                    this.DrawCircularLabels(co, prop['chart.labels'], font, size, r);
                }


                var color = 'rgba(255,255,255,0.8)';

                // Draw the axis labels
                for (var i = 0, len = this.scale2.labels.length; i < len; ++i) {
                    if (axes.indexOf('n') > -1) RG.Text2(this, {
                        'tag': 'scale',
                        'font': font,
                        'size': size,
                        'x': centerx,
                        'y': centery - (r * ((i + 1) / len)),
                        'text': this.scale2.labels[i],
                        'valign': 'center',
                        'halign': 'center',
                        'bounding': true,
                        'boundingFill': color
                    });
                    if (axes.indexOf('s') > -1) RG.Text2(this, {
                        'tag': 'scale',
                        'font': font,
                        'size': size,
                        'x': centerx,
                        'y': centery + (r * ((i + 1) / len)),
                        'text': this.scale2.labels[i],
                        'valign': 'center',
                        'halign': 'center',
                        'bounding': true,
                        'boundingFill': color
                    });
                    if (axes.indexOf('e') > -1) RG.Text2(this, {
                        'tag': 'scale',
                        'font': font,
                        'size': size,
                        'x': centerx + (r * ((i + 1) / len)),
                        'y': centery,
                        'text': this.scale2.labels[i],
                        'valign': 'center',
                        'halign': 'center',
                        'bounding': true,
                        'boundingFill': color
                    });
                    if (axes.indexOf('w') > -1) RG.Text2(this, {
                        'tag': 'scale',
                        'font': font,
                        'size': size,
                        'x': centerx - (r * ((i + 1) / len)),
                        'y': centery,
                        'text': this.scale2.labels[i],
                        'valign': 'center',
                        'halign': 'center',
                        'bounding': true,
                        'boundingFill': color
                    });
                }

                // Draw the center minimum value (but only if there's at least one axes labels stipulated)
                if (prop['chart.labels.axes'].length > 0) {
                    RG.Text2(this, {
                        'font': font,
                        'size': size,
                        'x': centerx,
                        'y': centery,
                        'text': RG.number_format(this, Number(this.scale2.min).toFixed(this.scale2.decimals), this.scale2.units_pre, this.scale2.units_post),
                        'valign': 'center',
                        'halign': 'center',
                        'bounding': true,
                        'boundingFill': color,
                        'tag': 'scale'
                    });
                }

                /**
                 * Draw the key
                 */
                if (key && key.length) {
                    RG.DrawKey(this, key, prop['chart.colors']);
                }
            };


        /**
         * Draws the circular labels that go around the charts
         *
         * @param labels array The labels that go around the chart
         */
        this.drawCircularLabels =
            this.DrawCircularLabels = function (context, labels, font_face, font_size, r) {
                var position = prop['chart.labels.position'];
                var r = r + 10;

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


                    var a = (360 / labels.length) * (i + 1) - (360 / (labels.length * 2));
                    var a = a - 90 + (prop['chart.labels.position'] == 'edge' ? ((360 / labels.length) / 2) : 0);

                    var x = Math.cos(a / (180 / RG.PI)) * (r + 10);
                    var y = Math.sin(a / (180 / RG.PI)) * (r + 10);

                    RG.Text2(this, {
                        'font': font_face,
                        'size': font_size,
                        'x': this.centerx + x,
                        'y': this.centery + y,
                        'text': String(labels[i]),
                        'valign': 'center',
                        'halign': 'center',
                        'tag': 'labels'
                    });
                }
            };


        /**
         * Draws a single tickmark
         */
        this.drawTick =
            this.DrawTick = function (x, y, color) {
                var tickmarks = prop['chart.tickmarks'];
                var ticksize = prop['chart.ticksize'];

                co.strokeStyle = color;
                co.fillStyle = color;

                // Cross
                if (tickmarks == 'cross') {

                    co.beginPath();
                    co.moveTo(x + ticksize, y + ticksize);
                    co.lineTo(x - ticksize, y - ticksize);
                    co.stroke();

                    co.beginPath();
                    co.moveTo(x - ticksize, y + ticksize);
                    co.lineTo(x + ticksize, y - ticksize);
                    co.stroke();

                    // Circle
                } else if (tickmarks == 'circle') {

                    co.beginPath();
                    co.arc(x, y, ticksize, 0, 6.2830, false);
                    co.fill();

                    // Square
                } else if (tickmarks == 'square') {

                    co.beginPath();
                    co.fillRect(x - ticksize, y - ticksize, 2 * ticksize, 2 * ticksize);
                    co.fill();

                    // Diamond shape tickmarks
                } else if (tickmarks == 'diamond') {

                    co.beginPath();
                    co.moveTo(x, y - ticksize);
                    co.lineTo(x + ticksize, y);
                    co.lineTo(x, y + ticksize);
                    co.lineTo(x - ticksize, y);
                    co.closePath();
                    co.fill();

                    // Plus style tickmarks
                } else if (tickmarks == 'plus') {

                    co.lineWidth = 1;

                    co.beginPath();
                    co.moveTo(x, y - ticksize);
                    co.lineTo(x, y + ticksize);
                    co.moveTo(x - ticksize, y);
                    co.lineTo(x + ticksize, y);
                    co.stroke();
                }
            };


        /**
         * This function makes it much easier to get the (if any) point that is currently being hovered over.
         *
         * @param object e The event object
         */
        this.getShape =
            this.getPoint = function (e) {
                var mouseXY = RG.getMouseXY(e);
                var mouseX = mouseXY[0];
                var mouseY = mouseXY[1];
                var overHotspot = false;
                var offset = prop['chart.tooltips.hotspot']; // This is how far the hotspot extends

                for (var i = 0, len = this.coords.length; i < len; ++i) {

                    var x = this.coords[i][0];
                    var y = this.coords[i][1];
                    var tooltip = this.coords[i][3];

                    if (
                        mouseX < (x + offset) &&
                        mouseX > (x - offset) &&
                        mouseY < (y + offset) &&
                        mouseY > (y - offset)
                    ) {

                        var tooltip = RG.parseTooltipText(prop['chart.tooltips'], i);

                        return {0: this, 1: x, 2: y, 3: i, 'object': this, 'x': x, 'y': y, 'index': i, 'tooltip': tooltip};
                    }
                }
            };


        /**
         * This function facilitates the installation of tooltip event listeners if
         * tooltips are defined.
         */
        this.allowTooltips =
            this.AllowTooltips = function () {
                // Preload any tooltip images that are used in the tooltips
                RG.PreLoadTooltipImages(this);


                /**
                 * This installs the window mousedown event listener that lears any
                 * highlight that may be visible.
                 */
                RG.InstallWindowMousedownTooltipListener(this);


                /**
                 * This installs the canvas mousemove event listener. This function
                 * controls the pointer shape.
                 */
                RG.InstallCanvasMousemoveTooltipListener(this);


                /**
                 * This installs the canvas mouseup event listener. This is the
                 * function that actually shows the appropriate tooltip (if any).
                 */
                RG.InstallCanvasMouseupTooltipListener(this);
            };


        /**
         * Each object type has its own Highlight() function which highlights the appropriate shape
         *
         * @param object shape The shape to highlight
         */
        this.highlight =
            this.Highlight = function (shape) {
                // Add the new highlight
                RG.Highlight.Point(this, shape);
            };


        /**
         * The getObjectByXY() worker method. Don't call this call:
         *
         * RGraph.ObjectRegistry.getObjectByXY(e)
         *
         * @param object e The event object
         */
        this.getObjectByXY = function (e) {
            var mouseXY = RG.getMouseXY(e);
            var mouseX = mouseXY[0];
            var mouseY = mouseXY[1];
            var centerx = this.centerx;
            var centery = this.centery;
            var radius = this.radius;

            if (
                mouseX > (centerx - radius)
                && mouseX < (centerx + radius)
                && mouseY > (centery - radius)
                && mouseY < (centery + radius)
            ) {

                return this;
            }
        };


        /**
         * This function positions a tooltip when it is displayed
         *
         * @param obj object    The chart object
         * @param int x         The X coordinate specified for the tooltip
         * @param int y         The Y coordinate specified for the tooltip
         * @param objec tooltip The tooltips DIV element
         */
        this.positionTooltip = function (obj, x, y, tooltip, idx) {
            var coordX = obj.coords[tooltip.__index__][0];
            var coordY = obj.coords[tooltip.__index__][1];
            var canvasXY = RG.getCanvasXY(obj.canvas);
            var gutterLeft = obj.gutterLeft;
            var gutterTop = obj.gutterTop;
            var width = tooltip.offsetWidth;

            // Set the top position
            tooltip.style.left = 0;
            tooltip.style.top = parseInt(tooltip.style.top) - 7 + 'px';

            // By default any overflow is hidden
            tooltip.style.overflow = '';

            // The arrow
            var img = new Image();
            img.src = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAFCAYAAACjKgd3AAAARUlEQVQYV2NkQAN79+797+RkhC4M5+/bd47B2dmZEVkBCgcmgcsgbAaA9GA1BCSBbhAuA/AagmwQPgMIGgIzCD0M0AMMAEFVIAa6UQgcAAAAAElFTkSuQmCC';
            img.style.position = 'absolute';
            img.id = '__rgraph_tooltip_pointer__';
            img.style.top = (tooltip.offsetHeight - 2) + 'px';
            tooltip.appendChild(img);

            // Reposition the tooltip if at the edges:

            // LEFT edge
            if ((canvasXY[0] + coordX - (width / 2)) < 10) {
                tooltip.style.left = (canvasXY[0] + coordX - (width * 0.1)) + 'px';
                img.style.left = ((width * 0.1) - 8.5) + 'px';

                // RIGHT edge
            } else if ((canvasXY[0] + coordX + (width / 2)) > doc.body.offsetWidth) {
                tooltip.style.left = canvasXY[0] + coordX - (width * 0.9) + 'px';
                img.style.left = ((width * 0.9) - 8.5) + 'px';

                // Default positioning - CENTERED
            } else {
                tooltip.style.left = (canvasXY[0] + coordX - (width * 0.5)) + 'px';
                img.style.left = ((width * 0.5) - 8.5) + 'px';
            }
        };


        /**
         * This function returns the radius (ie the distance from the center) for a particular
         * value.
         *
         * @param number value The value you want the radius for
         */
        this.getRadius = function (value) {
            var max = this.max;

            if (value < 0 || value > max) {
                return null;
            }

            var r = (value / max) * this.radius;

            return r;
        };


        /**
         * This allows for easy specification of gradients
         */
        this.parseColors = function () {
            // Save the original colors so that they can be restored when the canvas is reset
            if (this.original_colors.length === 0) {
                this.original_colors['data'] = RG.array_clone(this.data);
                this.original_colors['chart.highlight.stroke'] = RG.array_clone(prop['chart.highlight.stroke']);
                this.original_colors['chart.highlight.fill'] = RG.array_clone(prop['chart.highlight.fill']);
                this.original_colors['chart.colors.default'] = RG.array_clone(prop['chart.colors.default']);
            }


            // Go through the data
            for (var i = 0; i < this.data.length; i += 1) {
                for (var j = 0, len = this.data[i].length; j < len; j += 1) {
                    this.data[i][j][2] = this.parseSingleColorForGradient(this.data[i][j][2]);
                }
            }

            prop['chart.highlight.stroke'] = this.parseSingleColorForGradient(prop['chart.highlight.stroke']);
            prop['chart.highlight.fill'] = this.parseSingleColorForGradient(prop['chart.highlight.fill']);
            prop['chart.colors.default'] = this.parseSingleColorForGradient(prop['chart.colors.default']);
        };


        /**
         * Use this function to reset the object to the post-constructor state. Eg reset colors if
         * need be etc
         */
        this.reset = function () {
        };


        /**
         * This parses a single color value
         */
        this.parseSingleColorForGradient = function (color) {
            if (!color || typeof color != 'string') {
                return color;
            }

            if (color.match(/^gradient\((.*)\)$/i)) {

                var parts = RegExp.$1.split(':');

                // Create the gradient
                var grad = co.createRadialGradient(this.centerx, this.centery, 0, this.centerx, this.centery, this.radius);

                var diff = 1 / (parts.length - 1);

                grad.addColorStop(0, RG.trim(parts[0]));

                for (var j = 1; j < parts.length; ++j) {
                    grad.addColorStop(j * diff, RG.trim(parts[j]));
                }
            }

            return grad ? grad : color;
        };


        /**
         * This function handles highlighting an entire data-series for the interactive
         * key
         *
         * @param int index The index of the data series to be highlighted
         */
        this.interactiveKeyHighlight = function (index) {
            if (this.coords2 && this.coords2[index] && this.coords2[index].length) {
                this.coords2[index].forEach(function (value, idx, arr) {
                    co.beginPath();
                    co.fillStyle = prop['chart.key.interactive.highlight.chart.fill'];
                    co.arc(value[0], value[1], prop['chart.ticksize'] + 2, 0, RG.TWOPI, false);
                    co.fill();
                });
            }
        };


        /**
         * Using a function to add events makes it easier to facilitate method chaining
         *
         * @param string   type The type of even to add
         * @param function func
         */
        this.on = function (type, func) {
            if (type.substr(0, 2) !== 'on') {
                type = 'on' + type;
            }

            this[type] = func;

            return this;
        };


        /**
         * This helps the Gantt reset colors when the reset function is called.
         * It handles going through the data and resetting the colors.
         */
        this.resetColorsToOriginalValues = function () {
            /**
             * Copy the original colors over for single-event-per-line data
             */
            for (var i = 0, len = this.original_colors['data'].length; i < len; ++i) {
                for (var j = 0, len2 = this.original_colors['data'][i].length; j < len2; ++j) {
                    this.data[i][j][2] = RG.array_clone(this.original_colors['data'][i][j][2]);
                }
            }
        };


        /**
         * This function runs once only
         * (put at the end of the file (before any effects))
         */
        this.firstDrawFunc = function () {
        };


        /**
         * Register the object
         */
        RG.Register(this);


        /**
         * This is the 'end' of the constructor so if the first argument
         * contains configuration data - handle that.
         */
        if (parseConfObjectForOptions) {
            RG.parseObjectStyleConfig(this, conf.options);
        }
    };
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AnonSec Team