#

API Docs for: 3.10.3
Show: Inherited Protected Private Deprecated

# File: charts/js/StackedImpl.js

    /**
     * Provides core functionality for the handling of stacked numeric axis data for a chart.
     *
     * @module charts
     * @submodule axis-stacked-base
     */

    /**
     * StackedImpl contains logic for managing stacked numeric data. StackedImpl is used by the following classes:
     * <ul>
     *      <li>{{#crossLink "StackedAxisBase"}}{{/crossLink}}</li>
     *      <li>{{#crossLink "StackedAxis"}}{{/crossLink}}</li>
     *  </ul>
     *
     * @submodule axis-stacked-base
     * @class StackedImpl
     * @constructor
     */
    function StackedImpl()
    {
    }

    StackedImpl.NAME = "stackedImpl";

    StackedImpl.prototype = {
        /**
         * Type of data used in `Data`.
         *
         * @property _type
         * @readOnly
         * @private
         */
        _type: "stacked",

        /**
         * Calculates the maximum and minimum values for the `Data`.
         *
         * @method _updateMinAndMax
         * @private
         */
        _updateMinAndMax: function()
        {
            var max = 0,
                min = 0,
                pos = 0,
                neg = 0,
                len = 0,
                i = 0,
                key,
                num,
                keys = this.get("keys"),
                setMin = this.get("setMin"),
                setMax = this.get("setMax");

            for(key in keys)
            {
                if(keys.hasOwnProperty(key))
                {
                    len = Math.max(len, keys[key].length);
                }
            }
            for(; i < len; ++i)
            {
                pos = 0;
                neg = 0;
                for(key in keys)
                {
                    if(keys.hasOwnProperty(key))
                    {
                        num = keys[key][i];
                        if(isNaN(num))
                        {
                            continue;
                        }
                        if(num >= 0)
                        {
                            pos += num;
                        }
                        else
                        {
                            neg += num;
                        }
                    }
                }
                if(pos > 0)
                {
                    max = Math.max(max, pos);
                }
                else
                {
                    max = Math.max(max, neg);
                }
                if(neg < 0)
                {
                    min = Math.min(min, neg);
                }
                else
                {
                    min = Math.min(min, pos);
                }
            }
            this._actualMaximum = max;
            this._actualMinimum = min;
            if(setMax)
            {
                max = this._setMaximum;
            }
            if(setMin)
            {
                min = this._setMinimum;
            }
            this._roundMinAndMax(min, max, setMin, setMax);
        }
    };

    Y.StackedImpl = StackedImpl;