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✏️ Editing: series-range.js

YUI.add('series-range', function (Y, NAME) {

/**
 * Provides functionality for creating a range series.
 *
 * @module charts
 * @submodule series-range
 */

/**
 * An abstract class for creating range series instances.
 * RangeSeries is used by the following classes:
 * <ul>
 *      <li>{{#crossLink "CandlestickSeries"}}{{/crossLink}}</li>
 *      <li>{{#crossLink "OHLCSeries"}}{{/crossLink}}</li>
 *  </ul>
 *
 * @class RangeSeries
 * @extends CartesianSeries
 * @constructor
 * @param {Object} config (optional) Configuration parameters.
 * @submodule series-range
 */
function RangeSeries()
{
    RangeSeries.superclass.constructor.apply(this, arguments);
}

RangeSeries.NAME = "rangeSeries";

RangeSeries.ATTRS = {
    /**
     * Read-only attribute indicating the type of series.
     *
     * @attribute type
     * @type String
     * @default range
     */
    type: {
        value: "range"
    },

/**
     * Values to be used for open, high, low and close keys.
     *
     * @attribute ohlc
     * @type Object
     */
    ohlckeys: {
        valueFn: function() {
            return {
                open: "open",
                high: "high",
                low: "low",
                close: "close"
            };
        }
    }
};

Y.extend(RangeSeries, Y.CartesianSeries, {
    /**
     * Returns the width for each marker base on the width of the series
     * and the length of the dataProvider.
     *
     * @method calculateMarkerWidth
     * @param {Number} width The width, in pixels of the series.
     * @param {Number} count The length of the datProvider.
     * @return Number
     * @private
     */
    _calculateMarkerWidth: function(width, count, spacing)
    {
        var val = 0;
        while(val < 3 && spacing > -1)
        {
            spacing = spacing - 1;
            val = Math.round(width/count - spacing);
            if(val % 2 === 0) {
                val = val - 1;
            }
        }
        return Math.max(1, val);
    },

/**
     * Draws the series.
     *
     * @method drawSeries
     * @protected
     */
    drawSeries: function()
    {
        var xcoords = this.get("xcoords"),
            ycoords = this.get("ycoords"),
            styles = this.get("styles"),
            padding = styles.padding,
            len = xcoords.length,
            dataWidth = this.get("width") - (padding.left + padding.right),
            keys = this.get("ohlckeys"),
            opencoords = ycoords[keys.open],
            highcoords = ycoords[keys.high],
            lowcoords = ycoords[keys.low],
            closecoords = ycoords[keys.close],
            width = this._calculateMarkerWidth(dataWidth, len, styles.spacing),
            halfwidth = width/2;
        this._drawMarkers(xcoords, opencoords, highcoords, lowcoords, closecoords, len, width, halfwidth, styles);
    },

/**
     * Gets the default value for the `styles` attribute. Overrides
     * base implementation.
     *
     * @method _getDefaultStyles
     * @return Object
     * @private
     */
    _getDefaultStyles: function()
    {
        var styles = {
            spacing: 3
        };
        return this._mergeStyles(styles, RangeSeries.superclass._getDefaultStyles());
    }
});

Y.RangeSeries = RangeSeries;

}, '3.18.1', {"requires": ["series-cartesian"]});

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