    /**
     * 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.
     * @xtype tip
     */
    Ext.define('Ext.tip.Tip', {
        extend: 'Ext.panel.Panel',

        alternateClassName: 'Ext.Tip',

        /**
         * @cfg {Boolean} [closable=false]
         * True to render a close tool button into the tooltip header.
         */

        /**
         * @cfg {Number} [width='auto']
         * Width in pixels of the tip.  Width will be ignored if it
         * exceeds the bounds of {@link #minWidth} or {@link #maxWidth}.
         */

        /**
         * @cfg {Number} minWidth
         * The minimum width of the tip in pixels.
         */
        minWidth : 40,
        /**
         * @cfg {Number} maxWidth
         * The maximum width of the tip in pixels.  The maximum supported value is 500.
         */
        maxWidth : 500,
        /**
         * @cfg {Boolean/String} shadow
         * `true` or "sides" for the default effect, "frame" for 4-way shadow, and "drop"
         * for bottom-right shadow.
         */
        shadow : "sides",

        /**
         * @cfg {String} defaultAlign
         * **Experimental**. The default {@link Ext.util.Positionable#alignTo} anchor position value
         * for this tip relative to its element of origin.
         */
        defaultAlign : "tl-bl?",
        /**
         * @cfg {Boolean} constrainPosition
         * If `true`, then the tooltip will be automatically constrained to stay within
         * the browser viewport.
         */
        constrainPosition : true,

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

        /**
         * @cfg {String} closeAction
         * The action to take when the close header tool is clicked:
         *
         * - **{@link #method-destroy}** : {@link #method-remove remove} the window from the DOM and
         *   {@link Ext.Component#method-destroy destroy} it and all descendant Components. The
         *   window will **not** be available to be redisplayed via the {@link #method-show} method.
         *
         * - **{@link #method-hide}** : **Default.** {@link #method-hide} the window by setting visibility
         *   to hidden and applying negative offsets. The window will be available to be
         *   redisplayed via the {@link #method-show} method.
         *
         * **Note:** This behavior has changed! setting *does* affect the {@link #method-close} method
         * which will invoke the approriate closeAction.
         */
        closeAction: 'hide',

        ariaRole: 'tooltip',

        // Flag to Renderable to always look up the framing styles for this Component
        alwaysFramed: true,

        frameHeader: false,

        initComponent: function() {
            var me = this;

            me.floating = Ext.apply( {}, {
                shadow: me.shadow,
                constrain: me.constrainPosition
            }, me.self.prototype.floating);
            me.callParent(arguments);

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

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

        /**
         * @private
         * 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
    });