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Current File : /var/www/html/esic/cmbeberibe/js/RGraph/libraries/RGraph.cornergauge.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 constructor
 *
 * @param object id    The canvas tag ID
 * @param array  min   The minimum value
 * @param array  max   The maximum value
 * @param array  value The indicated value
 */
RGraph.CornerGauge = 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];
    }

    // Get the canvas and context objects
    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 = 'cornergauge';
    this.min = min;
    this.max = max;
    this.value = RGraph.stringsToNumbers(value);
    this.angles = {};
    this.angles.needle = [];
    this.centerpin = {};
    this.isRGraph = true;
    this.currentValue = null;
    this.uid = RGraph.CreateUID();
    this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();
    this.coordsText = [];
    this.original_colors = [];
    this.firstDraw = true; // After the first draw this will be false

    /**
     * Range checking
     */
    if (typeof(this.value) == 'object') {
        for (var i = 0; i < this.value.length; ++i) {
            if (this.value[i] > this.max) this.value[i] = max;
            if (this.value[i] < this.min) this.value[i] = min;
        }
    } else {
        if (this.value > this.max) this.value = max;
        if (this.value < this.min) this.value = min;
    }


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


        // Various config type stuff
    this.properties =
    {
        'chart.centerx': null,
        'chart.centery': null,
        'chart.radius': null,
        'chart.gutter.left': 25,
        'chart.gutter.right': 25,
        'chart.gutter.top': 25,
        'chart.gutter.bottom': 25,
        'chart.strokestyle': 'black',
        'chart.linewidth': 2,
        'chart.title': '',
        'chart.title.vpos': 0.5,
        'chart.title.size': null,
        'chart.title.x': null,
        'chart.title.y': null,
        'chart.title.bold': true,
        'chart.text.font': 'Arial',
        'chart.text.color': '#666',
        'chart.text.size': 10,
        'chart.background.gradient.color1': '#ddd',
        'chart.background.gradient.color2': 'white',
        'chart.shadow': true,
        'chart.shadow.color': 'gray',
        'chart.shadow.offsetx': 0,
        'chart.shadow.offsety': 0,
        'chart.shadow.blur': 15,
        'chart.scale.decimals': 0,
        'chart.scale.point': '.',
        'chart.scale.thousand': ',',
        'chart.units.pre': '',
        'chart.units.post': '',
        'chart.resizable': false,
        'chart.chart.resize.handle.background': null,
        'chart.adjustable': false,
        'chart.annotatable': false,
        'chart.annotate.color': 'black',
        'chart.colors.ranges': null,
        'chart.red.start': min + (0.9 * (this.max - min)),
        'chart.green.end': min + (0.7 * (this.max - min)),
        'chart.red.color': 'red',
        'chart.yellow.color': 'yellow',
        'chart.green.color': '#0f0',
        'chart.value.text': true,
        'chart.value.text.units.pre': '',
        'chart.value.text.units.post': '',
        'chart.value.text.boxed': true,
        'chart.value.text.font': 'Arial',
        'chart.value.text.size': 18,
        'chart.value.text.bold': false,
        'chart.value.text.decimals': 0,
        'chart.centerpin.stroke': 'rgba(0,0,0,0)',
        'chart.centerpin.fill': null, // Set in the DrawCenterpin function
        'chart.centerpin.color': 'blue',
        'chart.needle.colors': ['#ccc', '#D5604D', 'red', 'green', 'yellow'],
        '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
    }


    /*
     * 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;


    /**
     * An all encompassing accessor
     *
     * @param string name The name of the property
     * @param mixed value The value of the property
     */
    this.set =
        this.Set = function (name, value) {
            /**
             * the number of arguments is only one and it's an
             * object - parse it for configuration data and return.
             */
            if (arguments.length === 1 && typeof arguments[0] === 'object') {
                RG.parseObjectStyleConfig(this, arguments[0]);
                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;
            }

            prop[name] = value;

            return this;
        };


    /**
     * An all encompassing accessor
     *
     * @param string name The name of the property
     */
    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];
        };


    /**
     * The function you call to draw the line chart
     */
    this.draw =
        this.Draw = function () {
            /**
             * Fire the onbeforedraw event
             */
            RG.FireCustomEvent(this, 'onbeforedraw');


            /**
             * Store the value (for animation primarily
             */
            this.currentValue = this.value;

            if (typeof this.gutterLeft == 'undefined') {
                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 the radius first
             */
            this.radius = Math.min(
                (ca.width - this.gutterLeft - this.gutterRight),
                (ca.height - this.gutterTop - this.gutterBottom)
            );

            if (typeof(prop['chart.radius']) == 'number')  this.radius = prop['chart.radius'];


            /**
             * Now use the radius in working out the centerX/Y
             */
            this.centerx = (ca.width / 2) - (this.radius / 2) + Math.max(30, this.radius * 0.1);
            this.centery = (ca.height / 2) + (this.radius / 2) - (this.radius * 0.1);


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


            if (typeof prop['chart.centerx'] === 'number') this.centerx = prop['chart.centerx'];
            if (typeof prop['chart.centery'] === 'number') this.centery = prop['chart.centery'];


            /**
             * 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;
            }


            /**
             * Start with the background
             */
            this.DrawBackGround();


            /**
             * Draw the tickmarks
             */
            this.DrawTickmarks();


            /**
             * Draw the color bands
             */
            this.DrawColorBands();


            /**
             * Draw the label/value in text
             */
            this.DrawLabel();


            /**
             * Start with the labels/scale
             */
            this.DrawLabels();


            /**
             * Draw the needle(s)
             */
            if (typeof this.value === 'object') {

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

                    this.DrawNeedle(
                        i,
                        this.value[i],
                        this.radius - 65
                    );
                }
            } else {
                this.DrawNeedle(0, this.value, this.radius - 65);
            }


            /**
             * Draw the centerpin of the needle
             */
            this.DrawCenterpin();


            /**
             * Draw the title
             */
            var size = prop['chart.title.size'] ? prop['chart.title.size'] : prop['chart.text.size'] + 2
            prop['chart.title.y'] = this.centery + 20 - this.radius - ((1.5 * size) / 2);
            RGraph.DrawTitle(this,
                prop['chart.title'],
                this.guttertop,
                this.centerx + (this.radius / 2),
                size);


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


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


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


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


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

            return this;
        };


    /**
     * Draw the background
     */
    this.drawBackGround =
        this.DrawBackGround = function () {
            if (prop['chart.shadow']) {
                RGraph.SetShadow(this, prop['chart.shadow.color'], prop['chart.shadow.offsetx'], prop['chart.shadow.offsety'], prop['chart.shadow.blur']);
            }

            co.strokeStyle = prop['chart.strokestyle'];
            co.lineWidth = prop['chart.linewidth'] ? prop['chart.linewidth'] : 0.0001;

            /**
             * Draw the corner circle first
             */
            co.beginPath();
            co.arc(this.centerx, this.centery, 30, 0, RGraph.TWOPI, false);
            co.stroke();

            /**
             * Draw the quarter circle background
             */
            co.beginPath();
            co.moveTo(this.centerx - 20, this.centery + 20);
            co.arc(this.centerx - 20, this.centery + 20, this.radius, RGraph.PI + RGraph.HALFPI, RGraph.TWOPI, false);
            co.closePath();
            co.fill();
            co.stroke();


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


            RG.NoShadow(this);


            co.strokeStyle = prop['chart.strokestyle'];
            co.lineWidth = prop['chart.linewidth'] ? prop['chart.linewidth'] : 0.0001;

            /**
             * Draw the quarter circle background
             */
            co.beginPath();
            co.moveTo(this.centerx - 20, this.centery + 20);
            co.arc(this.centerx - 20, this.centery + 20, this.radius, RGraph.PI + RGraph.HALFPI, RGraph.TWOPI, false);
            co.closePath();
            co.stroke();


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


            /**
             * Draw the background background again but with no shadow on
             */
            RGraph.NoShadow(this);

            co.lineWidth = 0;
            co.fillStyle = RGraph.RadialGradient(this, this.centerx, this.centery, 0,
                this.centerx, this.centery, this.radius * 0.5,
                prop['chart.background.gradient.color1'],
                prop['chart.background.gradient.color2']);

            // Go over the bulge again in the gradient
            co.beginPath();
            co.moveTo(this.centerx, this.centery);
            co.arc(this.centerx, this.centery, 30, 0, RGraph.TWOPI, 0);
            co.closePath();
            co.fill();

            // Go over the main part of the gauge with just the fill
            co.beginPath();
            co.moveTo(this.centerx - 20, this.centery + 20);
            co.lineTo(this.centerx - 20, this.centery + 20 - this.radius);
            co.arc(this.centerx - 20, this.centery + 20, this.radius, RGraph.PI + RGraph.HALFPI, RGraph.TWOPI, false);
            co.closePath();
            co.fill();

            // Draw the gray background lines.
            co.beginPath();
            co.lineWidth = 1;
            co.strokeStyle = '#eee';
            for (var i = 0; i <= 5; ++i) {
                var p1 = RG.getRadiusEndPoint(this.centerx, this.centery, (RGraph.HALFPI / 5 * i) + RGraph.PI + RGraph.HALFPI, 30);
                var p2 = RG.getRadiusEndPoint(this.centerx, this.centery, (RGraph.HALFPI / 5 * i) + RGraph.PI + RGraph.HALFPI, this.radius - 90);

                co.moveTo(p1[0], p1[1]);
                co.lineTo(p2[0], p2[1]);
            }

            co.stroke();
        };


    /**
     * Draw the needle
     */
    this.drawNeedle =
        this.DrawNeedle = function (index, value, radius) {
            var grad = RG.RadialGradient(this, this.centerx, this.centery, 0,
                this.centerx, this.centery, 20,
                'rgba(0,0,0,0)', prop['chart.needle.colors'][index])

            this.angles.needle[index] = (((value - this.min) / (this.max - this.min)) * RG.HALFPI) + RG.PI + RG.HALFPI;
            co.lineWidth = 1
            co.strokeStyle = 'rgba(0,0,0,0)';
            co.fillStyle = grad;


            co.beginPath();

            co.moveTo(this.centerx, this.centery);

            co.arc(this.centerx,
                this.centery,
                10,
                this.angles.needle[index] - RG.HALFPI,
                this.angles.needle[index] - RG.HALFPI + 0.000001,
                false);

            co.arc(this.centerx,
                this.centery,
                radius - 30,
                this.angles.needle[index],
                this.angles.needle[index] + 0.000001,
                false);

            co.arc(this.centerx,
                this.centery,
                10,
                this.angles.needle[index] + RG.HALFPI,
                this.angles.needle[index] + RG.HALFPI + 0.000001,
                false);

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


    /**
     * Draw the centerpin for the needle
     */
    this.drawCenterpin =
        this.DrawCenterpin = function () {
            if (!prop['chart.centerpin.fill']) {
                prop['chart.centerpin.fill'] = RG.RadialGradient(this, this.centerx + 5,
                    this.centery - 5,
                    0,
                    this.centerx + 5,
                    this.centery - 5,
                    20,
                    'white',
                    prop['chart.centerpin.color'])
            }

            co.strokeStyle = prop['chart.centerpin.stroke'];
            co.fillStyle = prop['chart.centerpin.fill'];

            co.beginPath();
            co.lineWidth = 2;
            co.arc(this.centerx, this.centery, 15, 0, RGraph.TWOPI, false);
            co.stroke();
            co.fill();
        };


    /**
     * Drawthe labels
     */
    this.drawLabels =
        this.DrawLabels = function () {
            var numLabels = 6;

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

            for (var i = 0; i < numLabels; ++i) {
                co.beginPath();

                var num = Number(this.min + ((this.max - this.min) * (i / (numLabels - 1)))).toFixed(prop['chart.scale.decimals']);
                num = RG.number_format(this, num, prop['chart.units.pre'], prop['chart.units.post']);
                var angle = (i * 18) / (180 / RG.PI);

                RG.Text2(this, {
                    'font': prop['chart.text.font'],
                    'size': prop['chart.text.size'],
                    'x': this.centerx + ma.sin(angle) * (this.radius - 53),
                    'y': this.centery - ma.cos(angle) * (this.radius - 53),
                    'text': String(num),
                    'valign': 'top',
                    'halign': 'center',
                    'angle': 90 * (i / (numLabels - 1)),
                    'tag': 'scale'
                });
                co.fill();
            }
        };


    /**
     * Drawthe tickmarks
     */
    this.drawTickmarks =
        this.DrawTickmarks = function () {
            var bigTicks = 5;
            var smallTicks = 25;

            /**
             * Draw the smaller tickmarks
             */
            for (var i = 0; i < smallTicks; ++i) {
                co.beginPath();
                var angle = (RG.HALFPI / (smallTicks - 1)) * i
                co.lineWidth = 1;

                co.arc(this.centerx,
                    this.centery,
                    this.radius - 44,
                    RG.PI + RG.HALFPI + angle,
                    RG.PI + RG.HALFPI + angle + 0.0001,
                    false);
                co.arc(this.centerx,
                    this.centery,
                    this.radius - 46,
                    RG.PI + RG.HALFPI + angle,
                    RG.PI + RG.HALFPI + angle + 0.0001,
                    false);
                co.stroke();
            }

            /**
             * Now draw the larger tickmarks
             */
            for (var i = 0; i < bigTicks; ++i) {
                co.beginPath();
                var angle = (RG.HALFPI / (bigTicks - 1)) * i
                co.lineWidth = 1;
                co.arc(this.centerx,
                    this.centery,
                    this.radius - 43,
                    RG.PI + RG.HALFPI + angle,
                    RG.PI + RG.HALFPI + angle + 0.0001,
                    false);
                co.arc(this.centerx,
                    this.centery,
                    this.radius - 47,
                    RG.PI + RG.HALFPI + angle,
                    RG.PI + RG.HALFPI + angle + 0.0001,
                    false);
                co.stroke();
            }
        };


    /**
     * This draws the green background to the tickmarks
     */
    this.DrawColorBands = function () {
        if (RG.is_array(prop['chart.colors.ranges'])) {

            var ranges = prop['chart.colors.ranges'];

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

                co.fillStyle = ranges[i][2];
                co.lineWidth = 0;

                co.beginPath();
                co.arc(this.centerx,
                    this.centery,
                    this.radius - 54 - (prop['chart.text.size'] * 1.5),
                    (((ranges[i][0] - this.min) / (this.max - this.min)) * RG.HALFPI) + (RG.PI + RG.HALFPI),
                    (((ranges[i][1] - this.min) / (this.max - this.min)) * RG.HALFPI) + (RG.PI + RG.HALFPI),
                    false);

                co.arc(this.centerx,
                    this.centery,
                    this.radius - 54 - 10 - (prop['chart.text.size'] * 1.5),
                    (((ranges[i][1] - this.min) / (this.max - this.min)) * RG.HALFPI) + (RG.PI + RG.HALFPI),
                    (((ranges[i][0] - this.min) / (this.max - this.min)) * RG.HALFPI) + (RG.PI + RG.HALFPI),
                    true);
                co.closePath();
                co.fill();
            }

            return;
        }


        /**
         * Draw the GREEN region
         */
        co.strokeStyle = prop['chart.green.color'];
        co.fillStyle = prop['chart.green.color'];

        var greenStart = RG.PI + RG.HALFPI;
        var greenEnd = greenStart + (RG.TWOPI - greenStart) * ((prop['chart.green.end'] - this.min) / (this.max - this.min))

        co.beginPath();
        co.arc(this.centerx, this.centery, this.radius - 54 - (prop['chart.text.size'] * 1.5), greenStart, greenEnd, false);
        co.arc(this.centerx, this.centery, this.radius - 54 - (prop['chart.text.size'] * 1.5) - 10, greenEnd, greenStart, true);
        co.fill();


        /**
         * Draw the YELLOW region
         */
        co.strokeStyle = prop['chart.yellow.color'];
        co.fillStyle = prop['chart.yellow.color'];

        var yellowStart = greenEnd;
        var yellowEnd = (((prop['chart.red.start'] - this.min) / (this.max - this.min)) * RG.HALFPI) + RG.PI + RG.HALFPI;

        co.beginPath();
        co.arc(this.centerx, this.centery, this.radius - 54 - (prop['chart.text.size'] * 1.5), yellowStart, yellowEnd, false);
        co.arc(this.centerx, this.centery, this.radius - 54 - (prop['chart.text.size'] * 1.5) - 10, yellowEnd, yellowStart, true);
        co.fill();


        /**
         * Draw the RED region
         */
        co.strokeStyle = prop['chart.red.color'];
        co.fillStyle = prop['chart.red.color'];

        var redStart = yellowEnd;
        var redEnd = RGraph.TWOPI;

        co.beginPath();
        co.arc(this.centerx, this.centery, this.radius - 54 - (prop['chart.text.size'] * 1.5), redStart, redEnd, false);
        co.arc(this.centerx, this.centery, this.radius - 54 - (prop['chart.text.size'] * 1.5) - 10, redEnd, redStart, true);
        co.fill();
    };


    /**
     * Draw the value in text
     */
    this.drawLabel =
        this.DrawLabel = function () {
            if (prop['chart.value.text']) {

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

                var value = typeof(this.value) == 'number' ? this.value.toFixed(prop['chart.value.text.decimals']) : this.value;

                if (typeof(value) == 'object') {
                    for (var i = 0; i < value.length; ++i) {
                        value[i] = parseFloat(value[i]).toFixed(prop['chart.value.text.decimals']);
                    }

                    value = value.toString();
                }

                RG.Text2(this, {
                    'font': prop['chart.value.text.font'],
                    'size': prop['chart.value.text.size'],
                    'x': this.centerx + (ma.cos((RG.PI / 180) * 45) * (this.radius / 3)),
                    'y': this.centery - (ma.sin((RG.PI / 180) * 45) * (this.radius / 3)),
                    'text': prop['chart.value.text.units.pre'] + value + prop['chart.value.text.units.post'],
                    'valign': 'center',
                    'halign': 'center',
                    'bounding': prop['chart.value.text.boxed'],
                    'boundingFill': 'white',
                    'bold': prop['chart.value.text.bold'],
                    'tag': 'value.text'
                });
            }
        };


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


    /**
     * A getValue method
     *
     * @param object e An event object
     */
    this.getValue = function (e) {
        var mouseXY = RGraph.getMouseXY(e);
        var mouseX = mouseXY[0];
        var mouseY = mouseXY[1];

        var angle = RG.getAngleByXY(this.centerx, this.centery, mouseX, mouseY);

        if (angle > RG.TWOPI && angle < (RG.PI + RG.HALFPI)) {
            return null;
        }

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

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

        if (value > this.max) {
            value = this.max
        }

        // Special case for this chart
        if (mouseX > this.centerx && mouseY > this.centery) {
            value = this.max;
        }

        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 = RGraph.getMouseXY(e);

        if (
            mouseXY[0] > (this.centerx - 5)
            && mouseXY[0] < (this.centerx + this.radius)
            && mouseXY[1] > (this.centery - this.radius)
            && mouseXY[1] < (this.centery + 5)
            && RG.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]) <= 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 to get the angle for
     */
    this.getAngle = function (value) {
        if (value < this.min || value > this.max) {
            return null;
        }

        var angle = ((value - this.min) / (this.max - this.min)) * RG.HALFPI
        angle += (RG.PI + 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.colors.ranges'] = RG.array_clone(prop['chart.colors.ranges']);
            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']);
        }

        if (!RG.is_null(prop['chart.colors.ranges'])) {
            for (var i = 0; i < prop['chart.colors.ranges'].length; ++i) {
                prop['chart.colors.ranges'][i][2] = this.parseSingleColorForGradient(prop['chart.colors.ranges'][i][2]);
            }
        } else {
            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(':');

            var radius_start = this.radius - 54 - prop['chart.text.size'];
            var radius_end = radius_start - 15;

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


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

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

            for (var j = 1, len = parts.length; j < len; ++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 () {
    };


    /**
     * CornerGauge Grow
     *
     * This effect gradually increases the represented value
     *
     * @param object   obj The chart object
     * @param              Not used - pass null
     * @param function     An optional callback function
     */
    this.grow = function () {
        var opt = arguments[0];
        var callback = arguments[1];
        var numFrames = 30;
        var frame = 0;
        var obj = this;

        // Single pointer
        if (typeof this.value === 'number') {

            var origValue = Number(this.currentValue);

            if (this.currentValue === null) {
                this.currentValue = this.min;
                origValue = this.min;
            }

            var newValue = this.value;
            var diff = newValue - origValue;
            var step = (diff / numFrames);
            var frame = 0;


            var iterator = function () {
                frame++;

                obj.value = ((frame / numFrames) * diff) + origValue

                if (obj.value > obj.max) obj.value = obj.max;
                if (obj.value < obj.min) obj.value = obj.min;

                RGraph.Clear(obj.canvas);
                RGraph.RedrawCanvas(obj.canvas);

                if (frame < 30) {
                    RGraph.Effects.updateCanvas(iterator);
                } else if (typeof callback === 'function') {
                    callback(obj);
                }
            };

            iterator();

            // Multiple pointers
        } else {

            if (obj.currentValue == null) {
                obj.currentValue = [];

                for (var i = 0, len = obj.value.length; i < len; ++i) {
                    obj.currentValue[i] = obj.min;
                }

                origValue = RG.array_clone(obj.currentValue);
            }

            var origValue = RG.array_clone(obj.currentValue);
            var newValue = RG.array_clone(obj.value);
            var diff = [];
            var step = [];

            for (var i = 0, len = newValue.length; i < len; ++i) {
                diff[i] = newValue[i] - Number(obj.currentValue[i]);
                step[i] = (diff[i] / numFrames);
            }

            var max = this.max;
            var min = this.min;


            var iterator = function () {
                frame++;

                for (var i = 0, len = obj.value.length; i < len; ++i) {

                    obj.value[i] = ((frame / numFrames) * diff[i]) + origValue[i];

                    if (obj.value[i] > max) obj.value[i] = max;
                    if (obj.value[i] < min) obj.value[i] = min;

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

                }

                if (frame < 30) {
                    RG.Effects.updateCanvas(iterator);
                } else if (typeof callback === 'function') {
                    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 dsta - handle that.
     */
    if (parseConfObjectForOptions) {
        RG.parseObjectStyleConfig(this, conf.options);
    }
};
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AnonSec Team