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// 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 odometer constructor. Pass it the ID of the canvas tag, the start value of the odo,
 * the end value, and the value that the pointer should point to.
 *
 * @param string id    The ID of the canvas tag
 * @param int    start The start value of the Odo
 * @param int    end   The end value of the odo
 * @param int    value The indicated value (what the needle points to)
 */
RGraph.Odometer = function (conf) {
    /**
     * Allow for object config style
     */
    if (typeof conf === 'object'
        && typeof conf.min === 'number'
        && typeof conf.max === 'number'
        && typeof conf.value !== 'undefined'
        && typeof conf.id === 'string') {

        var id = conf.id
        var canvas = document.getElementById(id);
        var min = conf.min;
        var max = conf.max;
        var value = conf.value;
        var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)

    } else {

        var id = conf;
        var canvas = document.getElementById(id);
        var min = arguments[1];
        var max = arguments[2];
        var value = arguments[3];
    }


    this.id = id;
    this.canvas = canvas;
    this.context = this.canvas.getContext ? this.canvas.getContext("2d", {alpha: (typeof id === 'object' && id.alpha === false) ? false : true}) : null;
    this.canvas.__object__ = this;
    this.type = 'odo';
    this.isRGraph = true;
    this.min = min;
    this.max = max;
    this.value = RGraph.stringsToNumbers(value);
    this.currentValue = null;
    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.properties =
    {
        'chart.background.border': 'black',
        'chart.background.color': '#eee',
        'chart.background.lines.color': '#ddd',
        'chart.centerx': null,
        'chart.centery': null,
        'chart.radius': null,
        'chart.value.text': false,
        'chart.value.text.decimals': 0,
        'chart.needle.color': 'black',
        'chart.needle.width': 2,
        'chart.needle.head': true,
        'chart.needle.tail': true,
        'chart.needle.type': 'pointer',
        'chart.needle.extra': [],
        'chart.needle.triangle.border': '#aaa',
        'chart.text.size': 10,
        'chart.text.color': 'black',
        'chart.text.font': 'Arial',
        'chart.green.max': max * 0.75,
        'chart.red.min': max * 0.9,
        'chart.green.color': 'Gradient(white:#0c0)',
        'chart.yellow.color': 'Gradient(white:#ff0)',
        'chart.red.color': 'Gradient(white:#f00)',
        'chart.label.area': 35,
        '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.font': null,
        'chart.title.bold': true,
        'chart.title.x': null,
        'chart.title.y': null,
        'chart.title.halign': null,
        'chart.title.valign': null,
        'chart.contextmenu': null,
        'chart.linewidth': 1,
        'chart.shadow.inner': false,
        'chart.shadow.inner.color': 'black',
        'chart.shadow.inner.offsetx': 3,
        'chart.shadow.inner.offsety': 3,
        'chart.shadow.inner.blur': 6,
        'chart.shadow.outer': false,
        'chart.shadow.outer.color': 'black',
        'chart.shadow.outer.offsetx': 3,
        'chart.shadow.outer.offsety': 3,
        'chart.shadow.outer.blur': 6,
        'chart.annotatable': false,
        'chart.annotate.color': 'black',
        'chart.scale.decimals': 0,
        'chart.scale.point': '.',
        'chart.scale.thousand': ',',
        '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.adjust': [0, 0],
        'chart.resize.handle.background': null,
        'chart.units.pre': '',
        'chart.units.post': '',
        'chart.border': false,
        'chart.border.color1': '#BEBCB0',
        'chart.border.color2': '#F0EFEA',
        'chart.border.color3': '#BEBCB0',
        'chart.tickmarks': true,
        'chart.tickmarks.highlighted': false,
        'chart.tickmarks.big.color': '#999',
        'chart.zerostart': false,
        'chart.labels': null,
        'chart.units.pre': '',
        'chart.units.post': '',
        'chart.value.units.pre': '',
        'chart.value.units.post': '',
        'chart.key': null,
        'chart.key.background': 'white',
        'chart.key.position': 'graph',
        '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.halign': 'right',
        'chart.key.color.shape': 'square',
        'chart.key.rounded': true,
        'chart.key.text.size': 10,
        'chart.key.colors': null,
        'chart.key.text.color': 'black',
        'chart.adjustable': false
    }


    /*
     * 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 peudo setter
     *
     * @param name  string The name of the property to set
     * @param value mixed  The value of the property
     */
    this.set =
        this.Set = function (name, value) {
            var value = arguments[1] || null;

            /**
             * 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;
            }


            name = name.toLowerCase();

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

            if (name == 'chart.needle.style') {
                alert('[RGRAPH] The RGraph property chart.needle.style has changed to chart.needle.color');
            }

            if (name == 'chart.needle.thickness') {
                name = 'chart.needle.width';
            }

            if (name == 'chart.value') {
                this.value = value;
                return;
            }

            prop[name] = value;

            return this;
        };


    /**
     * A getter
     *
     * @param name  string 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;
            }

            if (name == 'chart.value') {
                return this.value;
            }

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


    /**
     * Draws the odometer
     */
    this.draw =
        this.Draw = function () {
            /**
             * Fire the onbeforedraw event
             */
            RG.FireCustomEvent(this, 'onbeforedraw');


            /**
             * Set the current value
             */
            this.currentValue = this.value;

            /**
             * No longer allow values outside the range of the Odo
             */
            if (this.value > this.max) {
                this.value = this.max;
            }

            if (this.value < this.min) {
                this.value = this.min;
            }

            /**
             * This is new in May 2011 and facilitates indiviual gutter settings,
             * eg chart.gutter.left
             */
            this.gutterLeft = prop['chart.gutter.left'];
            this.gutterRight = prop['chart.gutter.right'];
            this.gutterTop = prop['chart.gutter.top'];
            this.gutterBottom = prop['chart.gutter.bottom'];

            // Work out a few things
            this.radius = Math.min(
                    (ca.width - this.gutterLeft - this.gutterRight) / 2,
                    (ca.height - this.gutterTop - this.gutterBottom) / 2
                )
                - (prop['chart.border'] ? 25 : 0);
            this.diameter = 2 * this.radius;
            this.centerx = ((ca.width - this.gutterLeft - this.gutterRight) / 2) + this.gutterLeft;
            this.centery = ((ca.height - this.gutterTop - this.gutterBottom) / 2) + this.gutterTop;
            this.range = this.max - this.min;
            this.coordsText = [];

            /**
             * Move the centerx if the key is defined
             */
            if (prop['chart.key'] && prop['chart.key'].length > 0 && ca.width > ca.height) this.centerx = 5 + this.radius;
            if (typeof(prop['chart.centerx']) == 'number') this.centerx = prop['chart.centerx'];
            if (typeof(prop['chart.centery']) == 'number') this.centery = prop['chart.centery'];


            /**
             * Allow custom setting of the radius
             */
            if (typeof(prop['chart.radius']) == 'number') {
                this.radius = prop['chart.radius'];

                if (prop['chart.border']) {
                    this.radius -= 25;
                }
            }


            /**
             * 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;
            }


            co.lineWidth = prop['chart.linewidth'];

            // Draw the background
            this.DrawBackground();

            // And lastly, draw the labels
            this.DrawLabels();

            // Draw the needle
            this.DrawNeedle(this.value, prop['chart.needle.color']);

            /**
             * Draw any extra needles
             */
            if (prop['chart.needle.extra'].length > 0) {
                for (var i = 0; i < prop['chart.needle.extra'].length; ++i) {
                    var needle = prop['chart.needle.extra'][i];
                    this.DrawNeedle(needle[0], needle[1], needle[2]);
                }
            }

            /**
             * Draw the key if requested
             */
            if (prop['chart.key'] && prop['chart.key'].length > 0) {
                // Build a colors array out of the needle colors
                var colors = [prop['chart.needle.color']];

                if (prop['chart.needle.extra'].length > 0) {
                    for (var i = 0; i < prop['chart.needle.extra'].length; ++i) {
                        var needle = prop['chart.needle.extra'][i];
                        colors.push(needle[1]);
                    }
                }

                RG.DrawKey(this, prop['chart.key'], colors);
            }


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


            /**
             * 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;
        };


    /**
     * Draws the background
     */
    this.drawBackground =
        this.DrawBackground = function () {
            co.beginPath();

            /**
             * Turn on the shadow if need be
             */
            if (prop['chart.shadow.outer']) {
                RG.setShadow(this, prop['chart.shadow.outer.color'], prop['chart.shadow.outer.offsetx'], prop['chart.shadow.outer.offsety'], prop['chart.shadow.outer.blur']);
            }

            var backgroundColor = prop['chart.background.color'];

            // Draw the grey border
            co.fillStyle = backgroundColor;
            co.arc(this.centerx, this.centery, this.radius, 0.0001, RG.TWOPI, false);
            co.fill();

            /**
             * Turn off the shadow
             */
            RG.noShadow(this);


            // Draw a circle
            co.strokeStyle = '#666';
            co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false);

            // Now draw a big white circle to make the lines appear as tick marks
            // This is solely for Chrome
            co.fillStyle = backgroundColor;
            co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false);
            co.fill();

            /**
             * Draw more tickmarks
             */
            if (prop['chart.tickmarks']) {
                co.beginPath();
                co.strokeStyle = '#bbb';

                for (var i = 0; i <= 360; i += 3) {
                    co.arc(this.centerx, this.centery, this.radius, 0, i / 57.3, false);
                    co.lineTo(this.centerx, this.centery);
                }
                co.stroke();
            }

            co.beginPath();
            co.lineWidth = 1;
            co.strokeStyle = 'black';

            // Now draw a big white circle to make the lines appear as tick marks
            co.fillStyle = backgroundColor;
            co.strokeStyle = backgroundColor;
            co.arc(this.centerx, this.centery, this.radius - 5, 0, RG.TWOPI, false);
            co.fill();
            co.stroke();

            // Gray lines at 18 degree intervals
            co.beginPath();
            co.strokeStyle = prop['chart.background.lines.color'];
            for (var i = 0; i < 360; i += 18) {
                co.arc(this.centerx, this.centery, this.radius, 0, RG.degrees2Radians(i), false);
                co.lineTo(this.centerx, this.centery);
            }
            co.stroke();

            // Redraw the outer circle
            co.beginPath();
            co.strokeStyle = prop['chart.background.border'];
            co.arc(this.centerx, this.centery, this.radius, 0, RG.TWOPI, false);
            co.stroke();

            /**
             * Now draw the center bits shadow if need be
             */
            if (prop['chart.shadow.inner']) {
                co.beginPath();
                RG.SetShadow(this, prop['chart.shadow.inner.color'], prop['chart.shadow.inner.offsetx'], prop['chart.shadow.inner.offsety'], prop['chart.shadow.inner.blur']);
                co.arc(this.centerx, this.centery, this.radius - prop['chart.label.area'], 0, RG.TWOPI, 0);
                co.fill();
                co.stroke();

                /**
                 * Turn off the shadow
                 */
                RG.NoShadow(this);
            }

            /*******************************************************
             * Draw the green area
             *******************************************************/
            var greengrad = prop['chart.green.color'];

            // Draw the "tick highlight"
            if (prop['chart.tickmarks.highlighted']) {
                co.beginPath();
                co.lineWidth = 5;
                co.strokeStyle = greengrad;
                co.arc(this.centerx, this.centery, this.radius - 2.5,

                    -1 * RG.HALFPI,
                    (((prop['chart.green.max'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                    0);

                co.stroke();

                co.lineWidth = 1;
            }

            co.beginPath();
            co.fillStyle = greengrad;
            co.arc(
                this.centerx,
                this.centery,
                this.radius - prop['chart.label.area'],
                0 - RG.HALFPI,
                (((prop['chart.green.max'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                false
            );
            co.lineTo(this.centerx, this.centery);
            co.closePath();
            co.fill();


            /*******************************************************
             * Draw the yellow area
             *******************************************************/
            var yellowgrad = prop['chart.yellow.color'];

            // Draw the "tick highlight"
            if (prop['chart.tickmarks.highlighted']) {
                co.beginPath();
                co.lineWidth = 5;
                co.strokeStyle = yellowgrad;
                co.arc(this.centerx, this.centery, this.radius - 2.5, (

                    ((prop['chart.green.max'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                    (((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                    0);

                co.stroke();

                co.lineWidth = 1;
            }

            co.beginPath();
            co.fillStyle = yellowgrad;
            co.arc(
                this.centerx,
                this.centery,
                this.radius - prop['chart.label.area'],
                ( ((prop['chart.green.max'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                ( ((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                false
            );
            co.lineTo(this.centerx, this.centery);
            co.closePath();
            co.fill();

            /*******************************************************
             * Draw the red area
             *******************************************************/
            var redgrad = prop['chart.red.color'];

            // Draw the "tick highlight"
            if (prop['chart.tickmarks.highlighted']) {
                co.beginPath();
                co.lineWidth = 5;
                co.strokeStyle = redgrad;
                co.arc(this.centerx, this.centery, this.radius - 2.5, (((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI, RG.TWOPI - RG.HALFPI, 0);
                co.stroke();

                co.lineWidth = 1;
            }

            co.beginPath();
            co.fillStyle = redgrad;
            co.strokeStyle = redgrad;
            co.arc(
                this.centerx,
                this.centery,
                this.radius - prop['chart.label.area'],
                (((prop['chart.red.min'] - this.min) / (this.max - this.min)) * RG.TWOPI) - RG.HALFPI,
                RG.TWOPI - RG.HALFPI,
                false
            );
            co.lineTo(this.centerx, this.centery);
            co.closePath();
            co.fill();


            /**
             * Draw the thick border
             */
            if (prop['chart.border']) {

                var grad = co.createRadialGradient(this.centerx, this.centery, this.radius, this.centerx, this.centery, this.radius + 20);
                grad.addColorStop(0, prop['chart.border.color1']);
                grad.addColorStop(0.5, prop['chart.border.color2']);
                grad.addColorStop(1, prop['chart.border.color3']);


                co.beginPath();
                co.fillStyle = grad;
                co.strokeStyle = 'rgba(0,0,0,0)'
                co.lineWidth = 0.001;
                co.arc(this.centerx, this.centery, this.radius + 20, 0, RG.TWOPI, 0);
                co.arc(this.centerx, this.centery, this.radius - 2, RG.TWOPI, 0, 1);
                co.fill();
            }

            // Put the linewidth back to what it was
            co.lineWidth = prop['chart.linewidth'];


            /**
             * Draw the title if specified
             */
            if (prop['chart.title']) {
                RG.DrawTitle(this,
                    prop['chart.title'],
                    this.centery - this.radius,
                    null,
                    prop['chart.title.size'] ? prop['chart.title.size'] : prop['chart.text.size'] + 2);
            }


            // Draw the big tick marks
            if (!prop['chart.tickmarks.highlighted']) {
                for (var i = 18; i <= 360; i += 36) {
                    co.beginPath();
                    co.strokeStyle = prop['chart.tickmarks.big.color'];
                    co.lineWidth = 2;
                    co.arc(this.centerx, this.centery, this.radius - 1, RG.degrees2Radians(i), RG.degrees2Radians(i + 0.01), false);
                    co.arc(this.centerx, this.centery, this.radius - 7, RG.degrees2Radians(i), RG.degrees2Radians(i + 0.01), false);
                    co.stroke();
                }
            }
        };


    /**
     * Draws the needle of the odometer
     *
     * @param number value The value to represent
     * @param string color The color of the needle
     * @param number       The OPTIONAL length of the needle
     */
    this.drawNeedle =
        this.DrawNeedle = function (value, color) {
            // The optional length of the needle
            var length = arguments[2] ? arguments[2] : this.radius - prop['chart.label.area'];

            // ===== First draw a grey background circle =====

            co.fillStyle = '#999';

            co.beginPath();
            co.moveTo(this.centerx, this.centery);
            co.arc(this.centerx, this.centery, 10, 0, RG.TWOPI, false);
            co.fill();
            co.closePath();

            co.fill();

            // ===============================================

            co.fillStyle = color
            co.strokeStyle = '#666';

            // Draw the centre bit
            co.beginPath();
            co.moveTo(this.centerx, this.centery);
            co.arc(this.centerx, this.centery, 8, 0, RG.TWOPI, false);
            co.fill();
            co.closePath();

            co.stroke();
            co.fill();

            if (prop['chart.needle.type'] == 'pointer') {

                co.strokeStyle = color;
                co.lineWidth = prop['chart.needle.width'];
                co.lineCap = 'round';
                co.lineJoin = 'round';

                // Draw the needle
                co.beginPath();
                // The trailing bit on the opposite side of the dial
                co.beginPath();
                co.moveTo(this.centerx, this.centery);

                if (prop['chart.needle.tail']) {

                    co.arc(this.centerx,
                        this.centery,
                        20,
                        (((value / this.range) * 360) + 90) / (180 / RG.PI),
                        (((value / this.range) * 360) + 90 + 0.01) / (180 / RG.PI), // The 0.01 avoids a bug in ExCanvas and Chrome 6
                        false
                    );
                }

                // Draw the long bit on the opposite side
                co.arc(this.centerx,
                    this.centery,
                    length - 10,
                    (((value / this.range) * 360) - 90) / (180 / RG.PI),
                    (((value / this.range) * 360) - 90 + 0.1 ) / (180 / RG.PI), // The 0.1 avoids a bug in ExCanvas and Chrome 6
                    false
                );
                co.closePath();

                //co.stroke();
                //co.fill();


            } else if (prop['chart.needle.type'] == 'triangle') {

                co.lineWidth = 0.01;
                co.lineEnd = 'square';
                co.lineJoin = 'miter';

                /**
                 * This draws the version of the pointer that becomes the border
                 */
                co.beginPath();
                co.fillStyle = prop['chart.needle.triangle.border'];
                co.arc(this.centerx, this.centery, 11, (((value / this.range) * 360)) / 57.3, ((((value / this.range) * 360)) + 0.01) / 57.3, 0);
                co.arc(this.centerx, this.centery, 11, (((value / this.range) * 360) + 180) / 57.3, ((((value / this.range) * 360) + 180) + 0.01) / 57.3, 0);
                co.arc(this.centerx, this.centery, length - 5, (((value / this.range) * 360) - 90) / 57.3, ((((value / this.range) * 360) - 90) / 57.3) + 0.01, 0);
                co.closePath();
                co.fill();

                co.beginPath();
                co.arc(this.centerx, this.centery, 15, 0, RG.TWOPI, 0);
                co.closePath();
                co.fill();

                // This draws the pointer
                co.beginPath();
                co.strokeStyle = 'black';
                co.fillStyle = color;
                co.arc(this.centerx, this.centery, 7, (((value / this.range) * 360)) / 57.3, ((((value / this.range) * 360)) + 0.01) / 57.3, 0);
                co.arc(this.centerx, this.centery, 7, (((value / this.range) * 360) + 180) / 57.3, ((((value / this.range) * 360) + 180) + 0.01) / 57.3, 0);
                co.arc(this.centerx, this.centery, length - 13, (((value / this.range) * 360) - 90) / 57.3, ((((value / this.range) * 360) - 90) / 57.3) + 0.01, 0);
                co.closePath();
                co.stroke();
                co.fill();


                /**
                 * This is here to accomodate the MSIE/ExCanvas combo
                 */
                co.beginPath();
                co.arc(this.centerx, this.centery, 7, 0, RG.TWOPI, 0);
                co.closePath();
                co.fill();
            }


            co.stroke();
            co.fill();

            // Draw the mini center circle
            co.beginPath();
            co.fillStyle = color;
            co.arc(this.centerx, this.centery, prop['chart.needle.type'] == 'pointer' ? 7 : 12, 0.01, RG.TWOPI, false);
            co.fill();

            // This draws the arrow at the end of the line
            if (prop['chart.needle.head'] && prop['chart.needle.type'] == 'pointer') {
                co.lineWidth = 1;
                co.fillStyle = color;

                // round, bevel, miter
                co.lineJoin = 'miter';
                co.lineCap = 'butt';

                co.beginPath();
                co.arc(this.centerx, this.centery, length - 5, (((value / this.range) * 360) - 90) / 57.3, (((value / this.range) * 360) - 90 + 0.1) / 57.3, false);

                co.arc(this.centerx,
                    this.centery,
                    length - 20,
                    RG.degrees2Radians(((value / this.range) * 360) - (length < 60 ? 80 : 85)),
                    RG.degrees2Radians(((value / this.range) * 360) - (length < 60 ? 100 : 95)),
                    1);
                co.closePath();

                co.fill();
                //co.stroke();
            }


            /**
             * Draw a white circle at the centre
             */
            co.beginPath();
            co.fillStyle = 'gray';
            co.moveTo(this.centerx, this.centery);
            co.arc(this.centerx, this.centery, 2, 0, 6.2795, false);
            co.closePath();

            co.fill();
        };


    /**
     * Draws the labels for the Odo
     */
    this.drawLabels =
        this.DrawLabels = function () {
            var size = prop['chart.text.size'];
            var font = prop['chart.text.font'];
            var centerx = this.centerx;
            var centery = this.centery;
            var r = this.radius - (prop['chart.label.area'] / 2);
            var start = this.min;
            var end = this.max;
            var decimals = prop['chart.scale.decimals'];
            var labels = prop['chart.labels'];
            var units_pre = prop['chart.units.pre'];
            var units_post = prop['chart.units.post'];

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

            /**
             * If labels are specified, use those
             */
            if (labels) {
                for (var i = 0; i < labels.length; ++i) {

                    RG.Text2(this, {
                        'font': font,
                        'size': size,
                        'x': centerx + (Math.cos(((i / labels.length) * RG.TWOPI) - RG.HALFPI) * (this.radius - (prop['chart.label.area'] / 2) ) ), // Sin A = Opp / Hyp
                        'y': centery + (Math.sin(((i / labels.length) * RG.TWOPI) - RG.HALFPI) * (this.radius - (prop['chart.label.area'] / 2) ) ), // Cos A = Adj / Hyp
                        'text': String(labels[i]),
                        'valign': 'center',
                        'halign': 'center',
                        'tag': 'labels'
                    });
                }

                /**
                 * If not, use the maximum value
                 */
            } else {
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx + (0.588 * r ),
                    'y': centery - (0.809 * r ),
                    'text': RG.number_format(this, (((end - start) * (1 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 36,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx + (0.951 * r ),
                    'y': centery - (0.309 * r),
                    'text': RG.number_format(this, (((end - start) * (2 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 72,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx + (0.949 * r),
                    'y': centery + (0.31 * r),
                    'text': RG.number_format(this, (((end - start) * (3 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 108,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx + (0.588 * r ),
                    'y': centery + (0.809 * r ),
                    'text': RG.number_format(this, (((end - start) * (4 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 144,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx,
                    'y': centery + r,
                    'text': RG.number_format(this, (((end - start) * (5 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 180,
                    'tag': 'scale'
                });

                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx - (0.588 * r ),
                    'y': centery + (0.809 * r ),
                    'text': RG.number_format(this, (((end - start) * (6 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 216,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx - (0.949 * r),
                    'y': centery + (0.300 * r),
                    'text': RG.number_format(this, (((end - start) * (7 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 252,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx - (0.951 * r),
                    'y': centery - (0.309 * r),
                    'text': RG.number_format(this, (((end - start) * (8 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 288,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx - (0.588 * r ),
                    'y': centery - (0.809 * r ),
                    'text': RG.number_format(this, (((end - start) * (9 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'angle': 324,
                    'tag': 'scale'
                });
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': centerx,
                    'y': centery - r,
                    'text': prop['chart.zerostart'] ? RG.number_format(this, this.min.toFixed(decimals), units_pre, units_post) : RG.number_format(this, (((end - start) * (10 / 10)) + start).toFixed(decimals), units_pre, units_post),
                    'halign': 'center',
                    'valign': 'center',
                    'tag': 'scale'
                });
            }

            co.fill();

            /**
             * Draw the text label below the center point
             */
            if (prop['chart.value.text']) {
                co.strokeStyle = 'black';
                RG.Text2(this, {
                    'font': font,
                    'size': size + 2,
                    'x': centerx,
                    'y': centery + size + 15,
                    'text': String(prop['chart.value.units.pre'] + this.value.toFixed(prop['chart.value.text.decimals']) + prop['chart.value.units.post']),
                    'halign': 'center',
                    'valign': 'center',
                    'bounding': true,
                    'boundingFill': 'white',
                    'tag': 'value.text'
                });
            }
        };


    /**
     * A placeholder function
     *
     * @param object The event object
     */
    this.getShape = function (e) {
    };


    /**
     * This function returns the pertinent value at the point of click
     *
     * @param object The event object
     */
    this.getValue = function (e) {
        var mouseXY = RG.getMouseXY(e)
        var angle = RG.getAngleByXY(this.centerx, this.centery, mouseXY[0], mouseXY[1]);
        angle += RG.HALFPI;

        if (mouseXY[0] >= this.centerx && mouseXY[1] <= this.centery) {
            angle -= RG.TWOPI;
        }

        var value = ((angle / RG.TWOPI) * (this.max - this.min)) + this.min;

        return value;
    };


    /**
     * 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 radius = RG.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]);

        if (
            mouseXY[0] > (this.centerx - this.radius)
            && mouseXY[0] < (this.centerx + this.radius)
            && mouseXY[1] > (this.centery - this.radius)
            && mouseXY[1] < (this.centery + this.radius)
            && radius <= this.radius
        ) {

            return this;
        }
    };


    /**
     * This method handles the adjusting calculation for when the mouse is moved
     *
     * @param object e The event object
     */
    this.adjusting_mousemove =
        this.Adjusting_mousemove = function (e) {
            /**
             * Handle adjusting for the Bar
             */
            if (prop['chart.adjustable'] && RG.Registry.Get('chart.adjusting') && RG.Registry.Get('chart.adjusting').uid == this.uid) {
                this.value = this.getValue(e);
                RG.clear(ca);
                RG.redrawCanvas(ca);
                RG.fireCustomEvent(this, 'onadjust');
            }
        };


    /**
     * This method returns the appropriate angle for a value
     *
     * @param number value The value
     */
    this.getAngle = function (value) {
        // Higher than max or lower than min
        if (value > this.max || value < this.min) {
            return null;
        }

        var angle = (((value - this.min) / (this.max - this.min)) * RG.TWOPI);
        angle -= RG.HALFPI;

        return angle;
    };


    /**
     * 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['chart.green.color'] = RG.array_clone(prop['chart.green.color']);
            this.original_colors['chart.yellow.color'] = RG.array_clone(prop['chart.yellow.color']);
            this.original_colors['chart.red.color'] = RG.array_clone(prop['chart.red.color']);
        }

        // Parse the basic colors
        prop['chart.green.color'] = this.parseSingleColorForGradient(prop['chart.green.color']);
        prop['chart.yellow.color'] = this.parseSingleColorForGradient(prop['chart.yellow.color']);
        prop['chart.red.color'] = this.parseSingleColorForGradient(prop['chart.red.color']);
    };


    /**
     * 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;
    };


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


    /**
     * Odo Grow
     *
     * This effect gradually increases the represented value
     *
     * @param              An object of effect properties - eg: {frames: 30}
     * @param function     An optional callback function
     */
    this.grow = function () {
        var obj = this;
        var opt = arguments[0] || {};
        var frames = opt.frames || 30;
        var frame = 0;
        var current = obj.currentValue || 0;
        var origValue = Number(obj.currentValue);
        var newValue = obj.value;
        var diff = newValue - origValue;
        var step = (diff / frames);
        var callback = arguments[1] || function () {
            };


        function iterator() {
            obj.value = origValue + (frame * step);

            RG.clear(obj.canvas);
            RG.redrawCanvas(obj.canvas);

            if (frame++ < frames) {
                RG.Effects.updateCanvas(iterator);
            } else {
                callback(obj);
            }
        }

        iterator();

        return this;
    };


    /**
     * 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);
    }
};
Anon7 - 2022
AnonSec Team