Big-Data-HPC-Platform/esp/files/yui/build/charts/charts.js

/*
Copyright (c) 2009, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.8.0r4
*/
/**
 * The Charts widget provides a Flash control for displaying data
 * graphically by series across A-grade browsers with Flash Player installed.
 *
 * @module charts
 * @requires yahoo, dom, event, datasource
 * @title Charts Widget
 * @experimental
 */
 
/****************************************************************************/
/****************************************************************************/
/****************************************************************************/

/**
 * Chart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class Chart
 * @uses YAHOO.util.AttributeProvider
 * @constructor
 * @param type {String} The char type. May be "line", "column", "bar", or "pie"
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.Chart = function(type, containerId, dataSource, configurationAttributes)
{
    this._type = type;
    this._dataSource = dataSource;
        
    var possibleParams = {align:"", allowNetworking:"", allowScriptAccess:"", base:"", bgcolor:"", menu:"", name:"", quality:"", salign:"", scale:"", tabindex:"", wmode:""};
    var attributes = {fixedAttributes:{allowScriptAccess:"always"}, flashVars:{allowedDomain : document.location.hostname}, backgroundColor:"#ffffff", host:this, version:9.045};
    
    for(var i in configurationAttributes)
    {
        if(possibleParams.hasOwnProperty(i))
        {
            attributes.fixedAttributes[i] = configurationAttributes[i];
        }
        else
        {
            attributes[i] = configurationAttributes[i];
        }
    }
    
    this._id = attributes.id = attributes.id || YAHOO.util.Dom.generateId(null, "yuigen");
    
    if(attributes.version && attributes.version != null && attributes.version != undefined && attributes.version != "undefined")
    { 
        var version = (/\w*.\w*/.exec(((attributes.version).toString()).replace(/.0./g, "."))).toString();
        var verSplit = version.split(".");
        version = verSplit[0] + ".";
        switch((verSplit[1].toString()).length)
        {
            case 1: 
                version += "00";
            break;
            case 2:
                version += "0";
            break;  
        } 
        version += verSplit[1];
        attributes.version = parseFloat(version); 
    }
    
    this._swfURL = YAHOO.widget.Chart.SWFURL;
    this._containerID = containerId;
    
    this._attributes = attributes
    this._swfEmbed = new YAHOO.widget.SWF(containerId, YAHOO.widget.Chart.SWFURL, attributes);
    
    this._swf = this._swfEmbed.swf;
    this._swfEmbed.subscribe("swfReady", this._eventHandler, this, true);
            
    /**
     * Fires when the SWF is initialized and communication is possible.
     * @event contentReady
     */
    //Fix for iframe cross-domain issue with FF2x 
    try
    {
        this.createEvent("contentReady");
    }
    catch(e){}
    
    /**
     * Fires when the user moves the mouse over the bounds of an item renderer in the chart.
     *
     * @event itemMouseOverEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemMouseOverEvent");
    
    /**
     * Fires when the user moves the mouse out of the bounds of an item renderer in the chart.
     *
     * @event itemMouseOutEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemMouseOutEvent");
    
    /**
     * Fires when the user clicks an item renderer in the chart with the mouse.
     *
     * @event itemClickEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemClickEvent");
    
    /**
     * Fires when the user double-clicks an item renderer in the chart with the mouse.
     *
     * @event itemDoubleClickEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemDoubleClickEvent");
    
    /**
     * Fires when the user presses the mouse down on an item to initiate a drag action.
     *
     * @event itemDragStartEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemDragStartEvent");
    
    /**
     * Fires when the user moves the mouse during a drag action.
     *
     * @event itemDragEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemDragEvent");

    /**
     * Fires when the user releases the mouse during a drag action.
     *
     * @event itemDragEndEvent
     * @param event.type {String} The event type
     * @param event.item {Object} The data displayed by the renderer
     * @param event.index {Number} The position within the series that the item appears.
     * @param event.seriesIndex {Number} The position within the series definition that the series appears.
     * @param event.x {Number} The horizontal position of the mouse, relative to the SWF.
     * @param event.y {Number} The vertical position of the mouse, relative to the SWF.
     */
    this.createEvent("itemDragEndEvent");
};

YAHOO.extend(YAHOO.widget.Chart, YAHOO.util.AttributeProvider,
{
    /**
     * The type of this chart instance.
     * @property _type
     * @type String
     * @private
     */
    _type: null,

    /**
     * The id returned from the DataSource's setInterval function.
     * @property _pollingID
     * @type Number
     * @private
     */
    _pollingID: null,

    /**
     * The time, in ms, between requests for data.
     * @property _pollingInterval
     * @type Number
     * @private
     */
    _pollingInterval: null,

    /**
     * Stores a reference to the dataTipFunction created by
     * YAHOO.widget.Chart.createProxyFunction()
     * @property _dataTipFunction
     * @type String
     * @private
     */
    _dataTipFunction: null,
    
    /**
     * Stores a reference to the legendLabelFunction created by
     * YAHOO.widget.Chart.createProxyFunction()
     * @property _legendLabelFunction
     * @type String
     * @private
     */
    _legendLabelFunction: null, 
    
    /**
     * Stores references to series function values created by
     * YAHOO.widget.Chart.createProxyFunction()
     * @property _seriesFunctions
     * @type Array
     * @private
     */
    _seriesFunctions: null,

    /**
     * Public accessor to the unique name of the Chart instance.
     *
     * @method toString
     * @return {String} Unique name of the Chart instance.
     */
    toString: function()
    {
        return "Chart " + this._id;
    },
    
    /**
     * Sets a single style value on the Chart instance.
     *
     * @method setStyle
     * @param name {String} Name of the Chart style value to change.
     * @param value {Object} New value to pass to the Chart style.
     */
    setStyle: function(name, value)
    {
        //we must jsonify this because Flash Player versions below 9.0.60 don't handle
        //complex ExternalInterface parsing correctly
        value = YAHOO.lang.JSON.stringify(value);
        this._swf.setStyle(name, value);
    },
    
    /**
     * Resets all styles on the Chart instance.
     *
     * @method setStyles
     * @param styles {Object} Initializer for all Chart styles.
     */
    setStyles: function(styles)
    {
        //we must jsonify this because Flash Player versions below 9.0.60 don't handle
        //complex ExternalInterface parsing correctly
        styles = YAHOO.lang.JSON.stringify(styles);
        this._swf.setStyles(styles);
    },
    
    /**
     * Sets the styles on all series in the Chart.
     *
     * @method setSeriesStyles
     * @param styles {Array} Initializer for all Chart series styles.
     */
    setSeriesStyles: function(styles)
    {
        //we must jsonify this because Flash Player versions below 9.0.60 don't handle
        //complex ExternalInterface parsing correctly
        for(var i = 0; i < styles.length; i++)
        {
            styles[i] = YAHOO.lang.JSON.stringify(styles[i]);   
        }
        this._swf.setSeriesStyles(styles);
    },
    
    destroy: function()
    {
        //stop polling if needed
        if(this._dataSource !== null)
        {
            if(this._pollingID !== null)
            {
                this._dataSource.clearInterval(this._pollingID);
                this._pollingID = null;
            }
        }
        
        //remove proxy functions
        if(this._dataTipFunction)
        {
            YAHOO.widget.Chart.removeProxyFunction(this._dataTipFunction);
        }
        
        if(this._legendLabelFunction)
        {
            YAHOO.widget.Chart.removeProxyFunction(this._legendLabelFunction);
        }
        
        //kill the Flash Player instance
        if(this._swf)
        {
            var container = YAHOO.util.Dom.get(this._containerID);
            container.removeChild(this._swf);
        }
        
        var instanceName = this._id;
        
        //null out properties
        for(var prop in this)
        {
            if(YAHOO.lang.hasOwnProperty(this, prop))
            {
                this[prop] = null;
            }
        }
    },
    
    /**
     * Initializes the attributes.
     *
     * @method _initAttributes
     * @private
     */
    _initAttributes: function(attributes)
    {
        //YAHOO.widget.Chart.superclass._initAttributes.call(this, attributes);
        /**
         * @attribute wmode
         * @description Sets the window mode of the Flash Player control. May be
         *      "window", "opaque", or "transparent". Only available in the constructor
         *      because it may not be set after Flash Player has been embedded in the page.
         * @type String
         */
         
        /**
         * @attribute expressInstall
         * @description URL pointing to a SWF file that handles Flash Player's express
         *      install feature. Only available in the constructor because it may not be
         *      set after Flash Player has been embedded in the page.
         * @type String
         */

        /**
         * @attribute version
         * @description Minimum required version for the SWF file. Only available in the constructor because it may not be
         *      set after Flash Player has been embedded in the page.
         * @type String
         */

        /**
         * @attribute backgroundColor
         * @description The background color of the SWF. Only available in the constructor because it may not be
         *      set after Flash Player has been embedded in the page.
         * @type String
         */
         
        /**
         * @attribute altText
         * @description The alternative text to provide for screen readers and other assistive technology.
         * @type String
         */
        this.setAttributeConfig("altText",
        {
            method: this._setAltText,
            getter: this._getAltText
            
        });
        
        /**
         * @attribute swfURL
         * @description Absolute or relative URL to the SWF displayed by the Chart. Only available in the constructor because it may not be
         *      set after Flash Player has been embedded in the page.
         * @type String
         */
        this.setAttributeConfig("swfURL",
        {
            getter: this._getSWFURL
        });     

        /**
         * @attribute request
         * @description Request to be sent to the Chart's DataSource.
         * @type String
         */
        this.setAttributeConfig("request",
        {
            method: this._setRequest,
            getter: this._getRequest
        });
        
        /**
         * @attribute dataSource
         * @description The DataSource instance to display in the Chart.
         * @type DataSource
         */
        this.setAttributeConfig("dataSource",
        {
            method: this._setDataSource,
            getter: this._getDataSource
        });
        
        /**
         * @attribute series
         * @description Defines the series to be displayed by the Chart.
         * @type Array
         */
        this.setAttributeConfig("series",
        {
            method: this._setSeriesDefs,
            getter: this._getSeriesDefs
        });
        
        /**
         * @attribute categoryNames
         * @description Defines the names of the categories to be displayed in the Chart..
         * @type Array
         */
        this.setAttributeConfig("categoryNames",
        {
            validator: YAHOO.lang.isArray,
            method: this._setCategoryNames,
            getter: this._getCategoryNames
        });
        
        /**
         * @attribute dataTipFunction
         * @description The string representation of a globally-accessible function
         * that may be called by the SWF to generate the datatip text for a Chart's item.
         * @type String
         */
        this.setAttributeConfig("dataTipFunction",
        {
            method: this._setDataTipFunction,
            getter: this._getDataTipFunction
        });
        
        /**
         * @attribute legendLabelFunction
         * @description The string representation of a globally-accessible function
         * that may be called by the SWF to format the labels of a Chart's legend.
         * @type String
         */ 
        this.setAttributeConfig("legendLabelFunction",
        {
            method: this._setLegendLabelFunction,
            getter: this._legendLabelFunction
        });

        /**
         * @attribute polling
         * @description A numeric value indicating the number of milliseconds between
         * polling requests to the DataSource.
         * @type Number
         */
        this.setAttributeConfig("polling",
        {
            method: this._setPolling,
            getter: this._getPolling
        });
    },
    
    /**
     * Handles swfReady event from SWF.
     *
     * @method _eventHandler
     * @private
     */
    _eventHandler: function(event)
    { 
        if(event.type == "swfReady")
        {
            this._swf = this._swfEmbed._swf;
            this._loadHandler();
            this.fireEvent("contentReady");
        }
    },  
    
    /**
     * Called when the SWF is ready for communication. Sets the type, initializes
     * the styles, and sets the DataSource.
     *
     * @method _loadHandler
     * @private
     */
    _loadHandler: function()
    {
        //the type is set separately because it must be first!
        if(!this._swf || !this._swf.setType) return;
        this._swf.setType(this._type);


        //set initial styles
        if(this._attributes.style)
        {
            var style = this._attributes.style;
            this.setStyles(style);      
        }

        this._initialized = false;

        this._initAttributes(this._attributes);
        this.setAttributes(this._attributes, true);

        this._initialized = true;
        if(this._dataSource)
        {
            this.set("dataSource", this._dataSource);
        }
    },  

    /**
     * Sends (or resends) the request to the DataSource.
     *
     * @method refreshData
     */
    refreshData: function()
    {
        if(!this._initialized)
        {
            return;
        }
        
        if(this._dataSource !== null)
        {
            if(this._pollingID !== null)
            {
                this._dataSource.clearInterval(this._pollingID);
                this._pollingID = null;
            }
            
            if(this._pollingInterval > 0)
            {
                this._pollingID = this._dataSource.setInterval(this._pollingInterval, this._request, this._loadDataHandler, this);
            }
            this._dataSource.sendRequest(this._request, this._loadDataHandler, this);
        }
    },

    /**
     * Called when the DataSource receives new data. The series definitions are used
     * to build a data provider for the SWF chart.
     *
     * @method _loadDataHandler
     * @private
     */
    _loadDataHandler: function(request, response, error)
    {
        if(this._swf)
        {
            if(error)
            {
            }
            else
            {
                var i;
                if(this._seriesFunctions)
                {
                    var count = this._seriesFunctions.length;
                    for(i = 0; i < count; i++)
                    {
                        YAHOO.widget.Chart.removeProxyFunction(this._seriesFunctions[i]);
                    }
                    this._seriesFunctions = null;
                }
                this._seriesFunctions = [];

                //make a copy of the series definitions so that we aren't
                //editing them directly.
                var dataProvider = [];  
                var seriesCount = 0;
                var currentSeries = null;
                if(this._seriesDefs !== null)
                {
                    seriesCount = this._seriesDefs.length;
                    for(i = 0; i < seriesCount; i++)
                    {
                        currentSeries = this._seriesDefs[i];
                        var clonedSeries = {};
                        for(var prop in currentSeries)
                        {
                            if(YAHOO.lang.hasOwnProperty(currentSeries, prop))
                            {
                                if(prop == "style")
                                {
                                    if(currentSeries.style !== null)
                                    {
                                        clonedSeries.style = YAHOO.lang.JSON.stringify(currentSeries.style);
                                    }
                                }

                                else if(prop == "labelFunction")
                                {
                                    if(currentSeries.labelFunction !== null)
                                    {   
                                        clonedSeries.labelFunction = YAHOO.widget.Chart.getFunctionReference(currentSeries.labelFunction);
                                        this._seriesFunctions.push(clonedSeries.labelFunction);
                                    }
                                }

                                else if(prop == "dataTipFunction")
                                {
                                    if(currentSeries.dataTipFunction !== null)
                                    {
                                        clonedSeries.dataTipFunction = YAHOO.widget.Chart.getFunctionReference(currentSeries.dataTipFunction);
                                        this._seriesFunctions.push(clonedSeries.dataTipFunction);
                                    }   
                                }
                                
                                else if(prop == "legendLabelFunction")
                                {
                                    if(currentSeries.legendLabelFunction !== null)
                                    {
                                        clonedSeries.legendLabelFunction = YAHOO.widget.Chart.getFunctionReference(currentSeries.legendLabelFunction);
                                        this._seriesFunctions.push(clonedSeries.legendLabelFunction); 
                                    }   
                                }                               

                                else
                                {
                                    clonedSeries[prop] = currentSeries[prop];
                                }
                            }
                        }
                        dataProvider.push(clonedSeries);
                    }
                }

                if(seriesCount > 0)
                {
                    for(i = 0; i < seriesCount; i++)
                    {
                        currentSeries = dataProvider[i];
                        if(!currentSeries.type)
                        {
                            currentSeries.type = this._type;
                        }
                        currentSeries.dataProvider = response.results;
                    }
                }
                else
                {
                    var series = {type: this._type, dataProvider: response.results};
                    dataProvider.push(series);
                }
                try
                {
                    if(this._swf.setDataProvider) this._swf.setDataProvider(dataProvider);
                }
                catch(e)
                {
                    this._swf.setDataProvider(dataProvider);
                }
            }
        }
    },

    /**
     * Storage for the request attribute.
     * 
     * @property _request
     * @private
     */
    _request: "",
    
    /**
     * Getter for the request attribute.
     *
     * @method _getRequest
     * @private
     */
    _getRequest: function()
    {
        return this._request;
    },
    
    /**
     * Setter for the request attribute.
     *
     * @method _setRequest
     * @private
     */
    _setRequest: function(value)
    {
        this._request = value;
        this.refreshData();
    },

    /**
     * Storage for the dataSource attribute.
     * 
     * @property _dataSource
     * @private
     */
    _dataSource: null,
    
    /**
     * Getter for the dataSource attribute.
     *
     * @method _getDataSource
     * @private
     */
    _getDataSource: function()
    {
        return this._dataSource;
    },

    /**
     * Setter for the dataSource attribute.
     *
     * @method _setDataSource
     * @private
     */
    _setDataSource: function(value)
    {   
        this._dataSource = value;
        this.refreshData();
    },
    
    /**
     * Storage for the series attribute.
     * 
     * @property _seriesDefs
     * @private
     */
    _seriesDefs: null,
    
    /**
     * Getter for the series attribute.
     *
     * @method _getSeriesDefs
     * @private
     */
    _getSeriesDefs: function()
    {
        return this._seriesDefs;
    },
    
    /**
     * Setter for the series attribute.
     *
     * @method _setSeriesDefs
     * @private
     */
    _setSeriesDefs: function(value)
    {
        this._seriesDefs = value;
        this.refreshData();
    },

    /**
     * Getter for the categoryNames attribute.
     *
     * @method _getCategoryNames
     * @private
     */
    _getCategoryNames: function()
    {
        return this._swf.getCategoryNames();
    },

    /**
     * Setter for the categoryNames attribute.
     *
     * @method _setCategoryNames
     * @private
     */
    _setCategoryNames: function(value)
    {
        this._swf.setCategoryNames(value);
    },
    
    /**
     * Setter for the dataTipFunction attribute.
     *
     * @method _setDataTipFunction
     * @private
     */
    _setDataTipFunction: function(value)
    {
        if(this._dataTipFunction)
        {
            YAHOO.widget.Chart.removeProxyFunction(this._dataTipFunction);
        }
        
        if(value)
        {
            this._dataTipFunction = value = YAHOO.widget.Chart.getFunctionReference(value);
        }
        this._swf.setDataTipFunction(value);
    },
    
    /**
     * Setter for the legendLabelFunction attribute.
     *
     * @method _setLegendLabelFunction
     * @private
     */
    _setLegendLabelFunction: function(value)
    {
        if(this._legendLabelFunction)
        {
            YAHOO.widget.Chart.removeProxyFunction(this._legendLabelFunction);
        }
        
        if(value)
        {
            this._legendLabelFunction = value = YAHOO.widget.Chart.getFunctionReference(value);
        }
        this._swf.setLegendLabelFunction(value);
    },

    /**
     * Getter for the polling attribute.
     *
     * @method _getPolling
     * @private
     */
    _getPolling: function()
    {
        return this._pollingInterval;
    },

    /**
     * Setter for the polling attribute.
     *
     * @method _setPolling
     * @private
     */
    _setPolling: function(value)
    {
        this._pollingInterval = value;
        this.refreshData();
    },

    /**
     * The javascript wrapper for the swf object
     *
     * @property _swfEmbed
     * @type swf
     * @private
     */
    _swfEmbed: null,
    
    /**
     * The URL of the SWF file.
     * @property _swfURL
     * @type String
     * @private
     */
    _swfURL: null,

    /**
     * The ID of the containing DIV.
     * @property _containerID
     * @type String
     * @private
     */
    _containerID: null,

    /**
     * A reference to the embedded SWF file.
     * @property _swf
     * @private
     */
    _swf: null,

    /**
     * The id of this instance.
     * @property _id
     * @type String
     * @private
     */
    _id: null,

    /**
     * Indicates whether the SWF has been initialized and is ready
     * to communicate with JavaScript
     * @property _initialized
     * @type Boolean
     * @private
     */
    _initialized: false,
    
    /**
     * The initializing attributes are stored here until the SWF is ready.
     * @property _attributes
     * @type Object
     * @private
     */
    _attributes: null, //the intializing attributes
    
    set: function(name, value)
    {
        //save all the attributes in case the swf reloads
        //so that we can pass them in again
        this._attributes[name] = value;
        YAHOO.widget.Chart.superclass.set.call(this, name, value);
    },
    
    /**
     * Getter for swfURL attribute.
     *
     * @method _getSWFURL
     * @private
     */
    _getSWFURL: function()
    {
        return this._swfURL;
    },
    
    /**
     * Getter for altText attribute.
     *
     * @method _getAltText
     * @private
     */
    _getAltText: function()
    {
        return this._swf.getAltText();
    },

    /**
     * Setter for altText attribute.
     *
     * @method _setAltText
     * @private
     */
    _setAltText: function(value)
    {
        this._swf.setAltText(value);
    }
});

/**
 * The number of proxy functions that have been created.
 * @static
 * @private
 */
YAHOO.widget.Chart.proxyFunctionCount = 0;

/**
 * Creates a globally accessible function that wraps a function reference.
 * Returns the proxy function's name as a string for use by the SWF through
 * ExternalInterface.
 *
 * @method YAHOO.widget.Chart.createProxyFunction
 * @static
 * @private
 */
YAHOO.widget.Chart.createProxyFunction = function(func, scope)
{
    var scope = scope || null;
    var index = YAHOO.widget.Chart.proxyFunctionCount;
    YAHOO.widget.Chart["proxyFunction" + index] = function()
    {
        return func.apply(scope, arguments);
    };
    YAHOO.widget.Chart.proxyFunctionCount++;
    return "YAHOO.widget.Chart.proxyFunction" + index.toString();
};

/**
 * Uses YAHOO.widget.Chart.createProxyFunction to return string
 * reference to a function. 
 *
 * @method YAHOO.widget.Chart.getFunctionReference
 * @static
 * @private
 */
YAHOO.widget.Chart.getFunctionReference = function(value)
{
    if(typeof value == "function")
    {
        value = YAHOO.widget.Chart.createProxyFunction(value);
    }
    else if(value.func && typeof value.func == "function")
    {
        var args = [value.func];
        if(value.scope && typeof value.scope == "object")
        {
            args.push(value.scope);
        }
        value = YAHOO.widget.Chart.createProxyFunction.apply(this, args);
    }
    return value;   
}

/**
 * Removes a function created with createProxyFunction()
 * 
 * @method YAHOO.widget.Chart.removeProxyFunction
 * @static
 * @private
 */
YAHOO.widget.Chart.removeProxyFunction = function(funcName)
{
    //quick error check
    if(!funcName || funcName.indexOf("YAHOO.widget.Chart.proxyFunction") < 0)
    {
        return;
    }
    
    funcName = funcName.substr(26);
    YAHOO.widget.Chart[funcName] = null;
};

/**
 * Storage for the dataTipFunction attribute.
 *
 * @property Chart.SWFURL
 * @private
 * @static
 * @final
 * @default "assets/charts.swf"
 */
YAHOO.widget.Chart.SWFURL = "assets/charts.swf";
/**
 * PieChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class PieChart
 * @uses YAHOO.widget.Chart
 * @constructor
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.PieChart = function(containerId, dataSource, attributes)
{
    YAHOO.widget.PieChart.superclass.constructor.call(this, "pie", containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.PieChart, YAHOO.widget.Chart,
{
    /**
     * Initializes the attributes.
     *
     * @method _initAttributes
     * @private
     */
    _initAttributes: function(attributes)
    {   
        YAHOO.widget.PieChart.superclass._initAttributes.call(this, attributes);
        
        /**
         * @attribute dataField
         * @description The field in each item that corresponds to the data value.
         * @type String
         */
        this.setAttributeConfig("dataField",
        {
            validator: YAHOO.lang.isString,
            method: this._setDataField,
            getter: this._getDataField
        });
   
        /**
         * @attribute categoryField
         * @description The field in each item that corresponds to the category value.
         * @type String
         */
        this.setAttributeConfig("categoryField",
        {
            validator: YAHOO.lang.isString,
            method: this._setCategoryField,
            getter: this._getCategoryField
        });
    },

    /**
     * Getter for the dataField attribute.
     *
     * @method _getDataField
     * @private
     */
    _getDataField: function()
    {
        return this._swf.getDataField();
    },

    /**
     * Setter for the dataField attribute.
     *
     * @method _setDataField
     * @private
     */
    _setDataField: function(value)
    {
        this._swf.setDataField(value);
    },

    /**
     * Getter for the categoryField attribute.
     *
     * @method _getCategoryField
     * @private
     */
    _getCategoryField: function()
    {
        return this._swf.getCategoryField();
    },

    /**
     * Setter for the categoryField attribute.
     *
     * @method _setCategoryField
     * @private
     */
    _setCategoryField: function(value)
    {
        this._swf.setCategoryField(value);
    }
});
/**
 * CartesianChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class CartesianChart
 * @uses YAHOO.widget.Chart
 * @constructor
 * @param type {String} The char type. May be "line", "column", or "bar"
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
 YAHOO.widget.CartesianChart = function(type, containerId, dataSource, attributes)
{
    YAHOO.widget.CartesianChart.superclass.constructor.call(this, type, containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.CartesianChart, YAHOO.widget.Chart,
{
    /**
     * Stores a reference to the xAxis labelFunction created by
     * YAHOO.widget.Chart.createProxyFunction()
     * @property _xAxisLabelFunctions
     * @type String
     * @private
     */
    _xAxisLabelFunctions: [],
    
    /**
     * Stores a reference to the yAxis labelFunctions created by
     * YAHOO.widget.Chart.createProxyFunction()
     * @property _yAxisLabelFunctions
     * @type Array
     * @private
     */
    _yAxisLabelFunctions: [],
    
    destroy: function()
    {
        //remove proxy functions
        this._removeAxisFunctions(this._xAxisLabelFunctions);
        this._removeAxisFunctions(this._yAxisLabelFunctions);
        
        //call last
        YAHOO.widget.CartesianChart.superclass.destroy.call(this);
    },
    
    /**
     * Initializes the attributes.
     *
     * @method _initAttributes
     * @private
     */
    _initAttributes: function(attributes)
    {   
        YAHOO.widget.CartesianChart.superclass._initAttributes.call(this, attributes);
        
        /**
         * @attribute xField
         * @description The field in each item that corresponds to a value on the x axis.
         * @type String
         */
        this.setAttributeConfig("xField",
        {
            validator: YAHOO.lang.isString,
            method: this._setXField,
            getter: this._getXField
        });

        /**
         * @attribute yField
         * @description The field in each item that corresponds to a value on the x axis.
         * @type String
         */
        this.setAttributeConfig("yField",
        {
            validator: YAHOO.lang.isString,
            method: this._setYField,
            getter: this._getYField
        });

        /**
         * @attribute xAxis
         * @description A custom configuration for the horizontal x axis.
         * @type Axis
         */
        this.setAttributeConfig("xAxis",
        {
            method: this._setXAxis
        });
        
        /**
         * @attribute xAxes
         * @description Custom configurations for the horizontal x axes.
         * @type Array
         */     
        this.setAttributeConfig("xAxes",
        {
            method: this._setXAxes
        }); 

        /**
         * @attribute yAxis
         * @description A custom configuration for the vertical y axis.
         * @type Axis
         */
        this.setAttributeConfig("yAxis",
        {
            method: this._setYAxis
        });
        
        /**
         * @attribute yAxes
         * @description Custom configurations for the vertical y axes.
         * @type Array
         */     
        this.setAttributeConfig("yAxes",
        {
            method: this._setYAxes
        }); 
        
        /**
         * @attribute constrainViewport
         * @description Determines whether the viewport is constrained to prevent series data from overflow.
         * @type Boolean
         */
        this.setAttributeConfig("constrainViewport",
        {
            method: this._setConstrainViewport
        }); 
    },

    /**
     * Getter for the xField attribute.
     *
     * @method _getXField
     * @private
     */
    _getXField: function()
    {
        return this._swf.getHorizontalField();
    },

    /**
     * Setter for the xField attribute.
     *
     * @method _setXField
     * @private
     */
    _setXField: function(value)
    {
        this._swf.setHorizontalField(value);
    },

    /**
     * Getter for the yField attribute.
     *
     * @method _getYField
     * @private
     */
    _getYField: function()
    {
        return this._swf.getVerticalField();
    },

    /**
     * Setter for the yField attribute.
     *
     * @method _setYField
     * @private
     */
    _setYField: function(value)
    {
        this._swf.setVerticalField(value);
    },
    
    /**
     * Receives an axis object, creates a proxy function for 
     * the labelFunction and returns the updated object. 
     *
     * @method _getClonedAxis
     * @private
     */
    _getClonedAxis: function(value)
    {
        var clonedAxis = {};
        for(var prop in value)
        {
            if(prop == "labelFunction")
            {
                if(value.labelFunction && value.labelFunction !== null)
                {
                    clonedAxis.labelFunction = YAHOO.widget.Chart.getFunctionReference(value.labelFunction);
                }
            }
            else
            {
                clonedAxis[prop] = value[prop];
            }
        }
        return clonedAxis;
    },
    
    /**
     * Removes axis functions contained in an array
     * 
     * @method _removeAxisFunctions
     * @private
     */
    _removeAxisFunctions: function(axisFunctions)
    {
        if(axisFunctions && axisFunctions.length > 0)
        {
            var len = axisFunctions.length;
            for(var i = 0; i < len; i++)
            {
                if(axisFunctions[i] !== null)
                {
                    YAHOO.widget.Chart.removeProxyFunction(axisFunctions[i]);
                }
            }
            axisFunctions = [];
        }
    },  
    
    /**
     * Setter for the xAxis attribute.
     *
     * @method _setXAxis
     * @private
     */
    _setXAxis: function(value)
    {
        if(value.position != "bottom" && value.position != "top") value.position = "bottom";
        this._removeAxisFunctions(this._xAxisLabelFunctions);
        value = this._getClonedAxis(value);
        this._xAxisLabelFunctions.push(value.labelFunction);
        this._swf.setHorizontalAxis(value);
    },
    
    /**
     * Setter for the xAxes attribute
     *
     * @method _setXAxes
     * @private
     */
    _setXAxes: function(value)
    {
        this._removeAxisFunctions(this._xAxisLabelFunctions);
        var len = value.length;
        for(var i = 0; i < len; i++)
        {
            if(value[i].position == "left") value[i].position = "bottom";
            value[i] = this._getClonedAxis(value[i]);
            if(value[i].labelFunction) this._xAxisLabelFunctions.push(value[i].labelFunction);
            this._swf.setHorizontalAxis(value[i]);
        }
    },

    /**
     * Setter for the yAxis attribute.
     *
     * @method _setYAxis
     * @private
     */
    _setYAxis: function(value)
    {
        this._removeAxisFunctions(this._yAxisLabelFunctions);
        value = this._getClonedAxis(value);
        this._yAxisLabelFunctions.push(value.labelFunction);        
        this._swf.setVerticalAxis(value);
    },
    
    /**
     * Setter for the yAxes attribute.
     *
     * @method _setYAxes
     * @private
     */ 
    _setYAxes: function(value)
    {
        this._removeAxisFunctions(this._yAxisLabelFunctions);
        var len = value.length;
        for(var i = 0; i < len; i++)
        {
            value[i] = this._getClonedAxis(value[i]);
            if(value[i].labelFunction) this._yAxisLabelFunctions.push(value[i].labelFunction);
            this._swf.setVerticalAxis(value[i]);
        }       
    },
    
    /**
     * Setter for the constrainViewport attribute
     *
     * @method _setConstrainViewport
     * @private
     */
    _setConstrainViewport: function(value)
    {
        this._swf.setConstrainViewport(value);
    },
    
    /**
     * Sets the style object for a single series based on its index
     * 
     * @method setSeriesStylesByIndex
     * @param index {Number} The position within the series definition to apply the style
     * @param style {object} Style object to be applied to the selected series
     */
    setSeriesStylesByIndex:function(index, style)
    {
        style = YAHOO.lang.JSON.stringify(style);
        if(this._swf && this._swf.setSeriesStylesByIndex) this._swf.setSeriesStylesByIndex(index, style);
    }
});
/**
 * LineChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class LineChart
 * @uses YAHOO.widget.CartesianChart
 * @constructor
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.LineChart = function(containerId, dataSource, attributes)
{
    YAHOO.widget.LineChart.superclass.constructor.call(this, "line", containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.LineChart, YAHOO.widget.CartesianChart);

/**
 * ColumnChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class ColumnChart
 * @uses YAHOO.widget.CartesianChart
 * @constructor
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.ColumnChart = function(containerId, dataSource, attributes)
{
    YAHOO.widget.ColumnChart.superclass.constructor.call(this, "column", containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.ColumnChart, YAHOO.widget.CartesianChart);

/**
 * BarChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class BarChart
 * @uses YAHOO.widget.CartesianChart
 * @constructor
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.BarChart = function(containerId, dataSource, attributes)
{
    YAHOO.widget.BarChart.superclass.constructor.call(this, "bar", containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.BarChart, YAHOO.widget.CartesianChart);

/**
 * StackedColumnChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class StackedColumnChart
 * @uses YAHOO.widget.CartesianChart
 * @constructor
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.StackedColumnChart = function(containerId, dataSource, attributes)
{
    YAHOO.widget.StackedColumnChart.superclass.constructor.call(this, "stackcolumn", containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.StackedColumnChart, YAHOO.widget.CartesianChart);

/**
 * StackedBarChart class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class StackedBarChart
 * @uses YAHOO.widget.CartesianChart
 * @constructor
 * @param containerId {HTMLElement} Container element for the Flash Player instance.
 * @param dataSource {YAHOO.util.DataSource} DataSource instance.
 * @param attributes {object} (optional) Object literal of configuration values.
 */
YAHOO.widget.StackedBarChart = function(containerId, dataSource, attributes)
{
    YAHOO.widget.StackedBarChart.superclass.constructor.call(this, "stackbar", containerId, dataSource, attributes);
};

YAHOO.lang.extend(YAHOO.widget.StackedBarChart, YAHOO.widget.CartesianChart);
/**
 * Defines a CartesianChart's vertical or horizontal axis.
 *
 * @namespace YAHOO.widget
 * @class Axis
 * @constructor
 */
YAHOO.widget.Axis = function()
{
};

YAHOO.widget.Axis.prototype = 
{
    /**
     * The type of axis.
     *
     * @property type
     * @type String
     */
    type: null,
    
    /**
     * If true, the items on the axis will be drawn in opposite direction.
     *
     * @property reverse
     * @type Boolean
     */
    reverse: false,
    
    /**
     * A string reference to the globally-accessible function that may be called to
     * determine each of the label values for this axis. Also accepts function references.
     *
     * @property labelFunction
     * @type String
     */
    labelFunction: null,
    
    /**
     * The space, in pixels, between labels on an axis.
     *
     * @property labelSpacing
     * @type Number
     */
    labelSpacing: 2,
    
    /**
     * The text that will appear next to the axis to indicate information about the data that it displays.
     *
     * @property title
     * @type String
     */
    title: null 
};
/**
 * A type of axis whose units are measured in numeric values.
 *
 * @namespace YAHOO.widget
 * @class NumericAxis
 * @extends YAHOO.widget.Axis
 * @constructor
 */
YAHOO.widget.NumericAxis = function()
{
    YAHOO.widget.NumericAxis.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.NumericAxis, YAHOO.widget.Axis,
{
    type: "numeric",
    
    /**
     * The minimum value drawn by the axis. If not set explicitly, the axis minimum
     * will be calculated automatically.
     *
     * @property minimum
     * @type Number
     */
    minimum: NaN,
    
    /**
     * The maximum value drawn by the axis. If not set explicitly, the axis maximum
     * will be calculated automatically.
     *
     * @property maximum
     * @type Number
     */
    maximum: NaN,
    
    /**
     * The spacing between major intervals on this axis.
     *
     * @property majorUnit
     * @type Number
     */
    majorUnit: NaN,

    /**
     * The spacing between minor intervals on this axis.
     *
     * @property minorUnit
     * @type Number
     */
    minorUnit: NaN,
    
    /**
     * If true, the labels, ticks, gridlines, and other objects will snap to
     * the nearest major or minor unit. If false, their position will be based
     * on the minimum value.
     *
     * @property snapToUnits
     * @type Boolean
     */
    snapToUnits: true,
    
    /**
     * Series that are stackable will only stack when this value is set to true.
     *
     * @property stackingEnabled
     * @type Boolean
     */
    stackingEnabled: false,

    /**
     * If true, and the bounds are calculated automatically, either the minimum or
     * maximum will be set to zero.
     *
     * @property alwaysShowZero
     * @type Boolean
     */
    alwaysShowZero: true,

    /**
     * The scaling algorithm to use on this axis. May be "linear" or "logarithmic".
     *
     * @property scale
     * @type String
     */
    scale: "linear",
    
    /**
     * Indicates whether to round the major unit.
     * 
     * @property roundMajorUnit
     * @type Boolean
     */
    roundMajorUnit: true, 
    
    /**
     * Indicates whether to factor in the size of the labels when calculating a major unit.
     *
     * @property calculateByLabelSize
     * @type Boolean
     */
    calculateByLabelSize: true,
    
    /**
     * Indicates the position of the axis relative to the chart
     *
     * @property position
     * @type String
     */
    position:"left",
    
    /**
     * Indicates whether to extend maximum beyond data's maximum to the nearest 
     * majorUnit.
     *
     * @property adjustMaximumByMajorUnit
     * @type Boolean
     */
    adjustMaximumByMajorUnit:true,
    
    /**
     * Indicates whether to extend the minimum beyond data's minimum to the nearest
     * majorUnit.
     *
     * @property adjustMinimumByMajorUnit
     * @type Boolean
     */
    adjustMinimumByMajorUnit:true
});
/**
 * A type of axis whose units are measured in time-based values.
 *
 * @namespace YAHOO.widget
 * @class TimeAxis
 * @constructor
 */
YAHOO.widget.TimeAxis = function()
{
    YAHOO.widget.TimeAxis.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.TimeAxis, YAHOO.widget.Axis,
{
    type: "time",
    
    /**
     * The minimum value drawn by the axis. If not set explicitly, the axis minimum
     * will be calculated automatically.
     *
     * @property minimum
     * @type Date
     */
    minimum: null,

    /**
     * The maximum value drawn by the axis. If not set explicitly, the axis maximum
     * will be calculated automatically.
     *
     * @property maximum
     * @type Number
     */
    maximum: null,
    
    /**
     * The spacing between major intervals on this axis.
     *
     * @property majorUnit
     * @type Number
     */
    majorUnit: NaN,
    
    /**
     * The time unit used by the majorUnit.
     *
     * @property majorTimeUnit
     * @type String
     */
    majorTimeUnit: null,
    
    /**
     * The spacing between minor intervals on this axis.
     *
     * @property majorUnit
     * @type Number
     */
    minorUnit: NaN,
    
    /**
     * The time unit used by the minorUnit.
     *
     * @property majorTimeUnit
     * @type String
     */
    minorTimeUnit: null,

    /**
     * If true, the labels, ticks, gridlines, and other objects will snap to
     * the nearest major or minor unit. If false, their position will be based
     * on the minimum value.
     *
     * @property snapToUnits
     * @type Boolean
     */
    snapToUnits: true,

    /**
     * Series that are stackable will only stack when this value is set to true.
     *
     * @property stackingEnabled
     * @type Boolean
     */
    stackingEnabled: false,

    /**
     * Indicates whether to factor in the size of the labels when calculating a major unit.
     *
     * @property calculateByLabelSize
     * @type Boolean
     */
    calculateByLabelSize: true  
});
/**
 * A type of axis that displays items in categories.
 *
 * @namespace YAHOO.widget
 * @class CategoryAxis
 * @constructor
 */
YAHOO.widget.CategoryAxis = function()
{
    YAHOO.widget.CategoryAxis.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.CategoryAxis, YAHOO.widget.Axis,
{
    type: "category",
    
    /**
     * A list of category names to display along this axis.
     *
     * @property categoryNames
     * @type Array
     */
    categoryNames: null,
    
    /**
     * Indicates whether or not to calculate the number of categories (ticks and labels)
     * when there is not enough room to display all labels on the axis. If set to true, the axis 
     * will determine the number of categories to plot. If not, all categories will be plotted.
     *
     * @property calculateCategoryCount
     * @type Boolean
     */
    calculateCategoryCount: false 
});
 /**
 * Functionality common to most series. Generally, a <code>Series</code> 
 * object shouldn't be instantiated directly. Instead, a subclass with a 
 * concrete implementation should be used.
 *
 * @namespace YAHOO.widget
 * @class Series
 * @constructor
 */
YAHOO.widget.Series = function() {};

YAHOO.widget.Series.prototype = 
{
    /**
     * The type of series.
     *
     * @property type
     * @type String
     */
    type: null,
    
    /**
     * The human-readable name of the series.
     *
     * @property displayName
     * @type String
     */
    displayName: null
};

/**
 * Functionality common to most series appearing in cartesian charts.
 * Generally, a <code>CartesianSeries</code> object shouldn't be
 * instantiated directly. Instead, a subclass with a concrete implementation
 * should be used.
 *
 * @namespace YAHOO.widget
 * @class CartesianSeries
 * @uses YAHOO.widget.Series
 * @constructor
 */
YAHOO.widget.CartesianSeries = function() 
{
    YAHOO.widget.CartesianSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.CartesianSeries, YAHOO.widget.Series,
{
    /**
     * The field used to access the x-axis value from the items from the data source.
     *
     * @property xField
     * @type String
     */
    xField: null,
    
    /**
     * The field used to access the y-axis value from the items from the data source.
     *
     * @property yField
     * @type String
     */
    yField: null,
    
    /**
     * Indicates which axis the series will bind to
     *
     * @property axis
     * @type String
     */
    axis: "primary",
    
    /**
     * When a Legend is present, indicates whether the series will show in the legend.
     * 
     * @property showInLegend
     * @type Boolean
     */
    showInLegend: true
});

/**
 * ColumnSeries class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class ColumnSeries
 * @uses YAHOO.widget.CartesianSeries
 * @constructor
 */
YAHOO.widget.ColumnSeries = function() 
{
    YAHOO.widget.ColumnSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.ColumnSeries, YAHOO.widget.CartesianSeries,
{
    type: "column"
});

/**
 * LineSeries class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class LineSeries
 * @uses YAHOO.widget.CartesianSeries
 * @constructor
 */
YAHOO.widget.LineSeries = function() 
{
    YAHOO.widget.LineSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.LineSeries, YAHOO.widget.CartesianSeries,
{
    type: "line"
});


/**
 * BarSeries class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class BarSeries
 * @uses YAHOO.widget.CartesianSeries
 * @constructor
 */
YAHOO.widget.BarSeries = function() 
{
    YAHOO.widget.BarSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.BarSeries, YAHOO.widget.CartesianSeries,
{
    type: "bar"
});


/**
 * PieSeries class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class PieSeries
 * @uses YAHOO.widget.Series
 * @constructor
 */
YAHOO.widget.PieSeries = function() 
{
    YAHOO.widget.PieSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.PieSeries, YAHOO.widget.Series,
{
    type: "pie",
    
    /**
     * The field used to access the data value from the items from the data source.
     *
     * @property dataField
     * @type String
     */
    dataField: null,
    
    /**
     * The field used to access the category value from the items from the data source.
     *
     * @property categoryField
     * @type String
     */
    categoryField: null,

    /**
     * A string reference to the globally-accessible function that may be called to
     * determine each of the label values for this series. Also accepts function references.
     *
     * @property labelFunction
     * @type String
     */
    labelFunction: null
});

/**
 * StackedBarSeries class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class StackedBarSeries
 * @uses YAHOO.widget.CartesianSeries
 * @constructor
 */
YAHOO.widget.StackedBarSeries = function() 
{
    YAHOO.widget.StackedBarSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.StackedBarSeries, YAHOO.widget.CartesianSeries,
{
    type: "stackbar"
});

/**
 * StackedColumnSeries class for the YUI Charts widget.
 *
 * @namespace YAHOO.widget
 * @class StackedColumnSeries
 * @uses YAHOO.widget.CartesianSeries
 * @constructor
 */
YAHOO.widget.StackedColumnSeries = function() 
{
    YAHOO.widget.StackedColumnSeries.superclass.constructor.call(this);
};

YAHOO.lang.extend(YAHOO.widget.StackedColumnSeries, YAHOO.widget.CartesianSeries,
{
    type: "stackcolumn"
});
YAHOO.register("charts", YAHOO.widget.Chart, {version: "2.8.0r4", build: "2449"});