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Current File : /var/www/html/ouvidoria/pmcrateus/js/RGraph/libraries/RGraph.gantt.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 gantt chart constructor
 *
 * @param object conf The configuration object. You can also give seperate arguments if you prefer:
 *                    var foo = new RGraph.Gantt('cvs', [[0,50],[25,50],[50,50]]);
 */
RGraph.Gantt = function (conf) {
    /**
     * Allow for object config style
     */
    if (typeof conf === 'object'
        && typeof conf.data === 'object'
        && typeof conf.id === 'string') {

        var id = conf.id
        var canvas = document.getElementById(id);
        var data = conf.data;
        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 data = arguments[1];
    }


    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 = 'gantt';
    this.isRGraph = true;
    this.uid = RGraph.CreateUID();
    this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();
    this.data = data;
    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);


        // Set some defaults
    this.properties =
    {
        'chart.background.barcolor1': 'rgba(0,0,0,0)',
        'chart.background.barcolor2': 'rgba(0,0,0,0)',
        'chart.background.grid': true,
        'chart.background.grid.width': 1,
        'chart.background.grid.color': '#ddd',
        'chart.background.grid.hsize': 20,
        'chart.background.grid.vsize': 20,
        'chart.background.grid.hlines': true,
        'chart.background.grid.vlines': true,
        'chart.background.grid.border': true,
        'chart.background.grid.autofit': true,
        'chart.background.grid.autofit.numhlines': 7,
        'chart.background.grid.autofit.numvlines': 20,
        'chart.background.vbars': [],
        'chart.text.size': 10,
        'chart.text.font': 'Arial',
        'chart.text.color': 'black',
        'chart.gutter.left': 75,
        'chart.gutter.right': 25,
        'chart.gutter.top': 35,
        'chart.gutter.bottom': 25,
        'chart.labels': [],
        'chart.labels.align': 'bottom',
        'chart.labels.inbar': null,
        'chart.labels.inbar.color': 'black',
        'chart.labels.inbar.bgcolor': null,
        'chart.labels.inbar.align': 'left',
        'chart.labels.inbar.size': 10,
        'chart.labels.inbar.font': 'Arial',
        'chart.labels.inbar.above': false,
        'chart.vmargin': 2,
        'chart.title': '',
        'chart.title.background': null,
        'chart.title.x': null,
        'chart.title.y': null,
        'chart.title.bold': true,
        'chart.title.font': null,
        'chart.title.yaxis': '',
        'chart.title.yaxis.bold': true,
        'chart.title.yaxis.pos': null,
        'chart.title.yaxis.color': null,
        'chart.title.yaxis.position': 'right',
        'chart.title.yaxis.x': null,
        'chart.title.yaxis.y': null,
        'chart.title.xaxis.x': null,
        'chart.title.xaxis.y': null,
        'chart.title.xaxis.bold': true,
        'chart.title.x': null,
        'chart.title.y': null,
        'chart.title.halign': null,
        'chart.title.valign': null,
        'chart.borders': true,
        'chart.defaultcolor': 'white',
        'chart.coords': [],
        'chart.tooltips': null,
        'chart.tooltips.effect': 'fade',
        'chart.tooltips.css.class': 'RGraph_tooltip',
        'chart.tooltips.highlight': true,
        'chart.tooltips.event': 'onclick',
        'chart.highlight.stroke': 'rgba(0,0,0,0)',
        'chart.highlight.fill': 'rgba(255,255,255,0.7)',
        'chart.xmin': 0,
        'chart.xmax': 0,
        'chart.contextmenu': null,
        '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.adjust': [0, 0],
        'chart.resize.handle.background': null,
        'chart.adjustable': false,
        'chart.events.click': null,
        'chart.events.mousemove': null
    }


    /**
     * Create the dollar objects so that functions can be added to them
     */
    if (!data) {
        alert('[GANTT] The Gantt chart event data is now supplied as the second argument to the constructor - please update your code');
    }

    // Linearize the data (DON'T use RGraph.array_linearize() here)
    for (var i = 0, idx = 0; i < data.length; ++i) {
        if (RGraph.is_array(this.data[i][0])) {
            for (var j = 0; j < this.data[i].length; ++j) {
                this['$' + (idx++)] = {};
            }
        } else {
            this['$' + (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 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) {
            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;
            }


            name = name.toLowerCase();

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

            if (name == 'chart.margin') {
                name = 'chart.vmargin'
            }

            if (name == 'chart.events') {
                alert('[GANTT] The chart.events property is deprecated - supply the events data as an argument to the constructor instead');
                this.data = value;
            }

            prop[name] = value;

            return this;
        };


    /**
     * A peudo 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.margin') {
                name = 'chart.vmargin'
            }

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


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


            /**
             * 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'];

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


            /**
             * Parse the colors. This allows for simple gradient syntax
             */
            if (!this.colorsParsed) {

                this.parseColors();

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

            /**
             * Work out the graphArea
             */
            this.graphArea = ca.width - this.gutterLeft - this.gutterRight;
            this.graphHeight = ca.height - this.gutterTop - this.gutterBottom;
            this.numEvents = this.data.length
            this.barHeight = this.graphHeight / this.numEvents;
            this.halfBarHeight = this.barHeight / 2;


            /**
             * Draw the background
             */
            RG.background.Draw(this);


            /**
             * Draw the labels at the top
             */
            this.DrawLabels();


            /**
             * Draw the events
             */
            this.DrawEvents();


            /**
             * 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 labels at the top and the left of the chart
     */
    this.drawLabels =
        this.DrawLabels = function () {
            co.beginPath();
            co.fillStyle = prop['chart.text.color'];

            /**
             * Draw the X labels at the top of the chart.
             */
            var labels = prop['chart.labels'];
            var labelSpace = (this.graphArea) / labels.length;
            var x = this.gutterLeft + (labelSpace / 2);
            var y = this.gutterTop - (prop['chart.text.size'] / 2) - 5;
            var font = prop['chart.text.font'];
            var size = prop['chart.text.size'];

            co.strokeStyle = 'black'

            /**
             * This facilitates chart.labels.align
             */
            if (prop['chart.labels.align'] == 'bottom') {
                y = ca.height - this.gutterBottom + size + 2;
            }

            /**
             * Draw the horizontal labels
             */
            for (i = 0; i < labels.length; ++i) {
                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': x + (i * labelSpace),
                    'y': y,
                    'text': String(labels[i]),
                    'halign': 'center',
                    'valign': 'center',
                    'tag': 'labels.horizontal'
                });
            }

            /**
             * Draw the vertical labels
             */
            for (var i = 0, len = this.data.length; i < len; ++i) {

                var ev = this.data[i];
                var x = this.gutterLeft;
                var y = this.gutterTop + this.halfBarHeight + (i * this.barHeight);

                RG.Text2(this, {
                    'font': font,
                    'size': size,
                    'x': x - 5,
                    'y': y,
                    'text': RG.is_array(ev[0]) ? (ev[0][3] ? String(ev[0][3]) : '') : (typeof ev[3] == 'string' ? ev[3] : ''),
                    'halign': 'right',
                    'valign': 'center',
                    'tag': 'labels.vertical'
                });
            }
        };


    /**
     * Draws the events to the canvas
     */
    this.drawEvents =
        this.DrawEvents = function () {
            var events = this.data;

            /**
             * Reset the coords array to prevent it growing
             */
            this.coords = [];

            /**
             * First draw the vertical bars that have been added
             */
            if (prop['chart.vbars']) {

                for (i = 0, len = prop['chart.vbars'].length; i < len; ++i) {

                    // Boundary checking
                    if (prop['chart.vbars'][i][0] + prop['chart.vbars'][i][1] > prop['chart.xmax']) {
                        prop['chart.vbars'][i][1] = 364 - prop['chart.vbars'][i][0];
                    }

                    var barX = this.gutterLeft + (( (prop['chart.vbars'][i][0] - prop['chart.xmin']) / (prop['chart.xmax'] - prop['chart.xmin']) ) * this.graphArea);

                    var barY = this.gutterTop;
                    var width = (this.graphArea / (prop['chart.xmax'] - prop['chart.xmin']) ) * prop['chart.vbars'][i][1];
                    var height = ca.height - this.gutterTop - this.gutterBottom;

                    // Right hand bounds checking
                    if ((barX + width) > (ca.width - this.gutterRight)) {
                        width = ca.width - this.gutterRight - barX;
                    }

                    co.fillStyle = prop['chart.vbars'][i][2];
                    co.fillRect(barX, barY, width, height);
                }
            }


            /**
             * Draw the events
             */
            var sequentialIndex = 0;
            for (i = 0; i < events.length; ++i) {
                if (typeof(events[i][0]) == 'number') {
                    this.DrawSingleEvent(events[i], i, null);
                } else {
                    for (var j = 0; j < events[i].length; ++j) {
                        this.DrawSingleEvent(events[i][j], i, sequentialIndex++);
                    }
                }

            }
        };


    /**
     * Retrieves the bar (if any) that has been click on or is hovered over
     *
     * @param object e The event object
     */
    this.getShape =
        this.getBar = function (e) {
            e = RG.FixEventObject(e);

            //var canvas      = e.target;
            //var context     = canvas.getContext('2d');
            var mouseCoords = RGraph.getMouseXY(e);
            var mouseX = mouseCoords[0];
            var mouseY = mouseCoords[1];

            /**
             * Loop through the bars determining if the mouse is over a bar
             */
            for (var i = 0, len = this.coords.length; i < len; i++) {

                var left = this.coords[i][0];
                var top = this.coords[i][1];
                var width = this.coords[i][2];
                var height = this.coords[i][3];

                if (mouseX >= left
                    && mouseX <= (left + width)
                    && mouseY >= top
                    && mouseY <= (top + height)
                ) {

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

                    return {
                        0: this, 'object': this,
                        1: left, 'x': left,
                        2: top, 'y': top,
                        3: width, 'width': width,
                        4: height, 'height': height,
                        5: i, 'index': i,
                        'tooltip': tooltip
                    };
                }
            }
        };


    /**
     * Draws a single event
     */
    this.drawSingleEvent =
        this.DrawSingleEvent = function (ev, index, sequentialIndex) {
            var min = prop['chart.xmin'];

            co.beginPath();
            co.strokeStyle = 'black';
            co.fillStyle = ev[4] ? ev[4] : prop['chart.defaultcolor'];

            var barStartX = this.gutterLeft + (((ev[0] - min) / (prop['chart.xmax'] - min)) * this.graphArea);
            var barStartY = this.gutterTop + (index * this.barHeight);
            var barWidth = (ev[1] / (prop['chart.xmax'] - min) ) * this.graphArea;

            /**
             * If the width is greater than the graph atrea, curtail it
             */
            if ((barStartX + barWidth) > (ca.width - this.gutterRight)) {
                barWidth = ca.width - this.gutterRight - barStartX;
            }

            /**
             *  Draw the actual bar storing store the coordinates
             */
            this.coords.push([barStartX, barStartY + prop['chart.vmargin'], barWidth, this.barHeight - (2 * prop['chart.vmargin'])]);

            // draw the border around the bar
            if (prop['chart.borders'] || ev[6]) {
                co.strokeStyle = typeof(ev[6]) == 'string' ? ev[6] : 'black';
                co.lineWidth = (typeof(ev[7]) == 'number' ? ev[7] : 1);
                co.beginPath();
                co.strokeRect(barStartX, barStartY + prop['chart.vmargin'], barWidth, this.barHeight - (2 * prop['chart.vmargin']));
            }

            co.beginPath();
            co.fillRect(barStartX, barStartY + prop['chart.vmargin'], barWidth, this.barHeight - (2 * prop['chart.vmargin']));
            co.fill();

            // Work out the completeage indicator
            var complete = (ev[2] / 100) * barWidth;

            // Draw the % complete indicator. If it's greater than 0
            if (typeof(ev[2]) == 'number') {
                co.beginPath();
                co.fillStyle = ev[5] ? ev[5] : '#0c0';
                co.fillRect(barStartX,
                    barStartY + prop['chart.vmargin'],
                    (ev[2] / 100) * barWidth,
                    this.barHeight - (2 * prop['chart.vmargin']));

                co.beginPath();
                co.fillStyle = prop['chart.text.color'];
                RG.Text2(this, {
                    'font': prop['chart.text.font'],
                    'size': prop['chart.text.size'],
                    'x': barStartX + barWidth + 5,
                    'y': barStartY + this.halfBarHeight,
                    'text': String(ev[2]) + '%',
                    'valign': 'center',
                    'tag': 'labels.complete'
                });
            }

            /**
             * Draw the inbar label if it's defined
             */
            if (prop['chart.labels.inbar'] && (prop['chart.labels.inbar'][sequentialIndex] || prop['chart.labels.inbar'][index])) {

                var label = String(prop['chart.labels.inbar'][sequentialIndex] || prop['chart.labels.inbar'][index]);
                var halign = prop['chart.labels.inbar.align'] == 'left' ? 'left' : 'center';
                halign = prop['chart.labels.inbar.align'] == 'right' ? 'right' : halign;

                // Work out the position of the text
                if (halign == 'right') {
                    var x = (barStartX + barWidth) - 5;
                } else if (halign == 'center') {
                    var x = barStartX + (barWidth / 2);
                } else {
                    var x = barStartX + 5;
                }


                // Draw the labels "above" the bar
                if (prop['chart.labels.inbar.above']) {
                    x = barStartX + barWidth + 5;
                    halign = 'left';
                }


                // Set the color
                co.fillStyle = prop['chart.labels.inbar.color'];
                RGraph.Text2(this, {
                    'font': prop['chart.labels.inbar.font'],
                    'size': prop['chart.labels.inbar.size'],
                    'x': x,
                    'y': barStartY + this.halfBarHeight,
                    'text': label,
                    'valign': 'center',
                    'halign': halign,
                    'bounding': typeof(prop['chart.labels.inbar.bgcolor']) == 'string',
                    'boundingFill': typeof(prop['chart.labels.inbar.bgcolor']) == 'string' ? prop['chart.labels.inbar.bgcolor'] : null,
                    'tag': 'labels.inbar'
                });
            }
        };


    /**
     * 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.Rect(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);

        if (
            mouseXY[0] > this.gutterLeft
            && mouseXY[0] < (ca.width - this.gutterRight)
            && mouseXY[1] > this.gutterTop
            && mouseXY[1] < (ca.height - this.gutterBottom)
        ) {

            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) {

                var bar = RG.Registry.Get('chart.adjusting.gantt');

                if (bar) {
                    var mouseXY = RG.getMouseXY(e);
                    var obj = RG.Registry.Get('chart.adjusting.gantt')['object'];
                    var index = bar['index'];
                    var diff = ((mouseXY[0] - RG.Registry.Get('chart.adjusting.gantt')['mousex']) / (ca.width - obj.gutterLeft - obj.gutterRight)) * prop['chart.xmax'];
                    var eventStart = RG.Registry.Get('chart.adjusting.gantt')['event_start'];
                    var duration = RG.Registry.Get('chart.adjusting.gantt')['event_duration'];

                    if (bar['mode'] == 'move') {

                        diff = Math.round(diff);

                        if (eventStart + diff >= 0
                            && (eventStart + diff + obj.data[index][1]) < prop['chart.xmax']) {

                            obj.data[index][0] = eventStart + diff;

                        } else if (eventStart + diff < 0) {
                            obj.data[index][0] = 0;
                            //
                        } else if ((eventStart + diff + obj.data[index][1]) > prop['chart.xmax']) {
                            obj.data[index][0] = prop['chart.xmax'] - obj.data[index][1];
                        }

                    } else if (bar['mode'] == 'resize') {

                        /*
                         * Account for the right hand gutter. Appears to be a FF bug
                         */
                        if (mouseXY[0] > (ca.width - obj.gutterRight)) {
                            mouseXY[0] = ca.width - obj.gutterRight;
                        }

                        var diff = ((mouseXY[0] - RG.Registry.Get('chart.adjusting.gantt')['mousex']) / (ca.width - obj.gutterLeft - obj.gutterRight)) * prop['chart.xmax'];
                        diff = Math.round(diff);

                        obj.data[index][1] = duration + diff;

                        if (obj.data[index][1] < 0) {
                            obj.data[index][1] = 1;
                        }
                    }

                    RG.resetColorsToOriginalValues(this);

                    //RG.Clear(ca);
                    RG.redrawCanvas(ca);

                    RG.fireCustomEvent(obj, 'onadjust');
                }
            }
        };


    /**
     * 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 coordW = obj.coords[tooltip.__index__][2];
        var coordH = obj.coords[tooltip.__index__][3];
        var canvasXY = RG.getCanvasXY(obj.canvas);
        var gutterLeft = obj.gutterLeft;
        var gutterTop = obj.gutterTop;
        var width = tooltip.offsetWidth;
        var height = tooltip.offsetHeight;

        // Set the top position
        tooltip.style.left = 0;
        tooltip.style.top = canvasXY[1] + coordY - height - 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)) + (coordW / 2) + 'px';
            img.style.left = ((width * 0.1) - 8.5) + 'px';

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

            // Default positioning - CENTERED
        } else {
            tooltip.style.left = (canvasXY[0] + coordX + (coordW / 2) - (width * 0.5)) + 'px';
            img.style.left = ((width * 0.5) - 8.5) + 'px';
        }
    };


    /**
     * Returns the X coordinate for the given value
     *
     * @param number value The desired value (eg minute/hour/day etc)
     */
    this.getXCoord = function (value) {
        var min = prop['chart.xmin'];
        var max = prop['chart.xmax'];
        var graphArea = ca.width - this.gutterLeft - this.gutterRight;

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


        var x = (((value - min) / (max - min)) * graphArea) + this.gutterLeft;

        return x;
    };


    /**
     * Returns the value given EITHER the event object OR a two element array containing the X/Y coords
     */
    this.getValue = function (arg) {
        if (arg.length == 2) {
            var mouseXY = arg;
        } else {
            var mouseXY = RGraph.getMouseXY(arg);
        }

        var mouseX = mouseXY[0];
        var mouseY = mouseXY[1];

        var value = (mouseX - this.gutterLeft) / (ca.width - this.gutterLeft - this.gutterRight);
        value *= (prop['chart.xmax'] - prop['chart.xmin']);

        // Bounds checking
        if (value < prop['chart.xmin'] || value > prop['chart.xmax']) {
            value = null;
        }

        return value;
    };


    /**
     * This allows for easy specification of gradients. Could optimise this not to repeatedly call parseSingleColors()
     */
    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.arrayClone(this.data);


            this.original_colors['chart.background.barcolor1'] = RG.array_clone(prop['chart.background.barcolor1']);
            this.original_colors['chart.background.barcolor2'] = RG.array_clone(prop['chart.background.barcolor2']);
            this.original_colors['chart.background.grid.color'] = RG.array_clone(prop['chart.background.grid.color']);
            this.original_colors['chart.defaultcolor'] = RG.array_clone(prop['chart.defaultcolor']);
            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.coords can be used here as gradients are only parsed on the SECOND draw - not the first.
         * A .redraw() is downe at the end of the first draw.
         */
        for (var i = 0, sequentialIndex = 0; i < this.data.length; ++i) {

            if (typeof this.data[i][0] == 'object' && typeof this.data[i][0][0] === 'number') {

                for (var j = 0, len = this.data[i].length; j < len; j += 1, sequentialIndex += 1) {
                    this.data[i][j][4] = this.parseSingleColorForGradient(this.data[i][j][4], {start: this.data[i][j][0], duration: this.data[i][j][1]});
                    this.data[i][j][5] = this.parseSingleColorForGradient(this.data[i][j][5], {start: this.data[i][j][0], duration: this.data[i][j][1]});
                }

            } else {

                if (typeof this.data[i][4] == 'string') this.data[i][4] = this.parseSingleColorForGradient(this.data[i][4], {start: this.data[i][0], duration: this.data[i][1]});
                if (typeof this.data[i][5] == 'string') this.data[i][5] = this.parseSingleColorForGradient(this.data[i][5], {start: this.data[i][0], duration: this.data[i][1]});
                ++sequentialIndex;
            }
        }

        prop['chart.background.barcolor1'] = this.parseSingleColorForGradient(prop['chart.background.barcolor1']);
        prop['chart.background.barcolor2'] = this.parseSingleColorForGradient(prop['chart.background.barcolor2']);
        prop['chart.background.grid.color'] = this.parseSingleColorForGradient(prop['chart.background.grid.color']);
        prop['chart.background.color'] = this.parseSingleColorForGradient(prop['chart.background.color']);
        prop['chart.defaultcolor'] = this.parseSingleColorForGradient(prop['chart.defaultcolor']);
        prop['chart.highlight.stroke'] = this.parseSingleColorForGradient(prop['chart.highlight.stroke']);
        prop['chart.highlight.fill'] = this.parseSingleColorForGradient(prop['chart.highlight.fill']);
    };


    /**
     * 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
     *
     * @param string color The color to parse
     */
    this.parseSingleColorForGradient = function (color) {
        var opts = arguments[1] || {};

        if (!color || typeof(color) != 'string') {
            return color;
        }


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

            var parts = RegExp.$1.split(':');
            var value = (opts.start + opts.duration) > prop['chart.xmax'] ? prop['chart.xmax'] : (opts.start + opts.duration);

            // Create the gradient
            var grad = co.createLinearGradient(
                typeof opts.start === 'number' ? this.getXCoord(opts.start) : this.gutterLeft,
                0,
                typeof opts.start === 'number' ? this.getXCoord(value) : ca.width - this.gutterRight,
                0
            );

            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 () {
    };


    /**
     * Gantt chart Grow effect
     *
     * @param object   obj Options for the grow effect
     * @param function     Optional callback (a function)
     */
    this.grow = function () {
        var obj = this;
        var opt = arguments[0] || {};
        var callback = arguments[1] ? arguments[1] : function () {
        };
        var canvas = obj.canvas;
        var context = obj.context;
        var numFrames = opt.frames || 30;
        var frame = 0;

        var original_events = RG.arrayClone(obj.data);

        function iterator() {
            RG.clear(obj.canvas);
            RG.redrawCanvas(obj.canvas);


            if (frame <= numFrames) {
                // Update the events
                for (var i = 0, len = obj.data.length; i < len; ++i) {
                    if (typeof obj.data[i][0] === 'object') {
                        for (var j = 0; j < obj.data[i].length; ++j) {
                            obj.data[i][j][1] = (frame / numFrames) * original_events[i][j][1];
                        }
                    } else {
                        obj.data[i][1] = (frame / numFrames) * original_events[i][1];
                    }
                }

                obj.reset();


                frame++;

                RGraph.Effects.updateCanvas(iterator);

            } else {
                callback(obj);
            }
        }

        iterator();

        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; i < this.original_colors['data'].length; ++i) {
            if (this.original_colors['data'][i][4]) {
                this.data[i][4] = RG.arrayClone(this.original_colors['data'][i][4]);
            }

            if (this.original_colors['data'][i][5]) {
                this.data[i][5] = RG.arrayClone(this.original_colors['data'][i][5]);
            }

            if (typeof this.original_colors['data'][i][0] === 'object' && typeof this.original_colors['data'][i][0][0] === 'number') {
                for (var j = 0, len2 = this.original_colors['data'][i].length; j < len2; ++j) {
                    this.data[i][j][4] = RG.arrayClone(this.original_colors['data'][i][j][4]);
                    this.data[i][j][5] = RG.arrayClone(this.original_colors['data'][i][j][5]);
                }
            }
        }
    };


    /**
     * This function resets the object - clearing it of any previously gathered info
     */
    this.reset = function () {
        this.resetColorsToOriginalValues();

        this.colorsParsed = false;
        this.coordsText = [];
        this.original_colors = [];
        this.firstDraw = true;
        this.coords = [];
    };


    /**
     * 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