    /**
     * @class Ext.layout.container.HBox
     * @extends Ext.layout.container.Box
     * <p>A layout that arranges items horizontally across a Container. This layout optionally divides available horizontal
     * space between child items containing a numeric <code>flex</code> configuration.</p>
     * This layout may also be used to set the heights of child items by configuring it with the {@link #align} option.
     * {@img Ext.layout.container.HBox/Ext.layout.container.HBox.png Ext.layout.container.HBox container layout}
     * Example usage:
        Ext.create('Ext.Panel', {
            width: 500,
            height: 300,
            title: "HBoxLayout Panel",
            layout: {
                type: 'hbox',
                align: 'stretch'
            },
            renderTo: document.body,
            items: [{
                xtype: 'panel',
                title: 'Inner Panel One',
                flex: 2
            },{
                xtype: 'panel',
                title: 'Inner Panel Two',
                flex: 1
            },{
                xtype: 'panel',
                title: 'Inner Panel Three',
                flex: 1
            }]
        });
     */
    Ext.define('Ext.layout.container.HBox', {

        /* Begin Definitions */

        alias: ['layout.hbox'],
        extend: 'Ext.layout.container.Box',
        alternateClassName: 'Ext.layout.HBoxLayout',

        /* End Definitions */

        /**
         * @cfg {String} align
         * Controls how the child items of the container are aligned. Acceptable configuration values for this
         * property are:
         * <div class="mdetail-params"><ul>
         * <li><b><tt>top</tt></b> : <b>Default</b><div class="sub-desc">child items are aligned vertically
         * at the <b>top</b> of the container</div></li>
         * <li><b><tt>middle</tt></b> : <div class="sub-desc">child items are aligned vertically in the
         * <b>middle</b> of the container</div></li>
         * <li><b><tt>stretch</tt></b> : <div class="sub-desc">child items are stretched vertically to fill
         * the height of the container</div></li>
         * <li><b><tt>stretchmax</tt></b> : <div class="sub-desc">child items are stretched vertically to
         * the height of the largest item.</div></li>
         * </ul></div>
         */
        align: 'top', // top, middle, stretch, strechmax

        //@private
        alignCenteringString: 'middle',

        type : 'hbox',

        direction: 'horizontal',

        // When creating an argument list to setSize, use this order
        parallelSizeIndex: 0,
        perpendicularSizeIndex: 1,

        parallelPrefix: 'width',
        parallelPrefixCap: 'Width',
        parallelLT: 'l',
        parallelRB: 'r',
        parallelBefore: 'left',
        parallelBeforeCap: 'Left',
        parallelAfter: 'right',
        parallelPosition: 'x',

        perpendicularPrefix: 'height',
        perpendicularPrefixCap: 'Height',
        perpendicularLT: 't',
        perpendicularRB: 'b',
        perpendicularLeftTop: 'top',
        perpendicularRightBottom: 'bottom',
        perpendicularPosition: 'y'
    });