    /**
     * @class Ext.tip.Tip
     * @extends Ext.panel.Panel
     * This is the base class for {@link Ext.tip.QuickTip} and {@link Ext.tip.ToolTip} that provides the basic layout and
     * positioning that all tip-based classes require. This class can be used directly for simple, statically-positioned
     * tips that are displayed programmatically, or it can be extended to provide custom tip implementations.
     * @constructor
     * Create a new Tip
     * @param {Object} config The configuration options
     * @xtype tip
     */
    Ext.define('Ext.tip.Tip', {
        extend: 'Ext.panel.Panel',
        requires: [ 'Ext.layout.component.Tip' ],
        alternateClassName: 'Ext.Tip',
        /**
         * @cfg {Boolean} closable True to render a close tool button into the tooltip header (defaults to false).
         */
        /**
         * @cfg {Number} width
         * Width in pixels of the tip (defaults to auto).  Width will be ignored if it exceeds the bounds of
         * {@link #minWidth} or {@link #maxWidth}.  The maximum supported value is 500.
         */
        /**
         * @cfg {Number} minWidth The minimum width of the tip in pixels (defaults to 40).
         */
        minWidth : 40,
        /**
         * @cfg {Number} maxWidth The maximum width of the tip in pixels (defaults to 300).  The maximum supported value is 500.
         */
        maxWidth : 300,
        /**
         * @cfg {Boolean/String} shadow True or "sides" for the default effect, "frame" for 4-way shadow, and "drop"
         * for bottom-right shadow (defaults to "sides").
         */
        shadow : "sides",

        /**
         * @cfg {String} defaultAlign <b>Experimental</b>. The default {@link Ext.core.Element#alignTo} anchor position value
         * for this tip relative to its element of origin (defaults to "tl-bl?").
         */
        defaultAlign : "tl-bl?",
        /**
         * @cfg {Boolean} constrainPosition If true, then the tooltip will be automatically constrained to stay within
         * the browser viewport. Defaults to false.
         */
        constrainPosition : true,

        /**
         * @inherited
         */
        frame: false,

        // private panel overrides
        autoRender: true,
        hidden: true,
        baseCls: Ext.baseCSSPrefix + 'tip',
        floating: {
            shadow: true,
            shim: true,
            constrain: true
        },
        focusOnToFront: false,
        componentLayout: 'tip',

        closeAction: 'hide',

        ariaRole: 'tooltip',

        initComponent: function() {
            this.callParent(arguments);

            // Or in the deprecated config. Floating.doConstrain only constrains if the constrain property is truthy.
            this.constrain = this.constrain || this.constrainPosition;
        },

        /**
         * Shows this tip at the specified XY position.  Example usage:
         * <pre><code>
    // Show the tip at x:50 and y:100
    tip.showAt([50,100]);
    </code></pre>
         * @param {Array} xy An array containing the x and y coordinates
         */
        showAt : function(xy){
            var me = this;
            this.callParent();
            // Show may have been vetoed.
            if (me.isVisible()) {
                me.setPagePosition(xy[0], xy[1]);
                if (me.constrainPosition || me.constrain) {
                    me.doConstrain();
                }
                me.toFront(true);
            }
        },

        /**
         * <b>Experimental</b>. Shows this tip at a position relative to another element using a standard {@link Ext.core.Element#alignTo}
         * anchor position value.  Example usage:
         * <pre><code>
    // Show the tip at the default position ('tl-br?')
    tip.showBy('my-el');

    // Show the tip's top-left corner anchored to the element's top-right corner
    tip.showBy('my-el', 'tl-tr');
    </code></pre>
         * @param {Mixed} el An HTMLElement, Ext.core.Element or string id of the target element to align to
         * @param {String} position (optional) A valid {@link Ext.core.Element#alignTo} anchor position (defaults to 'tl-br?' or
         * {@link #defaultAlign} if specified).
         */
        showBy : function(el, pos) {
            this.showAt(this.el.getAlignToXY(el, pos || this.defaultAlign));
        },

        /**
         * @private
         * @override
         * Set Tip draggable using base Component's draggability
         */
        initDraggable : function(){
            var me = this;
            me.draggable = {
                el: me.getDragEl(),
                delegate: me.header.el,
                constrain: me,
                constrainTo: me.el.dom.parentNode
            };
            // Important: Bypass Panel's initDraggable. Call direct to Component's implementation.
            Ext.Component.prototype.initDraggable.call(me);
        },

        // Tip does not ghost. Drag is "live"
        ghost: undefined,
        unghost: undefined
    });