    /**
     * Provides attractive and customizable tooltips for any element. The QuickTips
     * singleton is used to configure and manage tooltips globally for multiple elements
     * in a generic manner.  To create individual tooltips with maximum customizability,
     * you should consider either {@link Ext.tip.Tip} or {@link Ext.tip.ToolTip}.
     *
     * Quicktips can be configured via tag attributes directly in markup, or by
     * registering quick tips programmatically via the {@link #register} method.
     *
     * The singleton's instance of {@link Ext.tip.QuickTip} is available via
     * {@link #getQuickTip}, and supports all the methods, and all the all the
     * configuration properties of Ext.tip.QuickTip. These settings will apply to all
     * tooltips shown by the singleton.
     *
     * Below is the summary of the configuration properties which can be used.
     * For detailed descriptions see the config options for the
     * {@link Ext.tip.QuickTip QuickTip} class
     *
     * ## QuickTips singleton configs (all are optional)
     *
     *  - `dismissDelay`
     *  - `hideDelay`
     *  - `maxWidth`
     *  - `minWidth`
     *  - `showDelay`
     *  - `trackMouse`
     *
     * ## Target element configs (optional unless otherwise noted)
     *
     *  - `autoHide`
     *  - `cls`
     *  - `dismissDelay` (overrides singleton value)
     *  - `target` (required)
     *  - `text` (required)
     *  - `title`
     *  - `width`
     *
     * Here is an example showing how some of these config options could be used:
     *
     *     @example
     *     // Init the singleton.  Any tag-based quick tips will start working.
     *     Ext.tip.QuickTipManager.init();
     *
     *     // Apply a set of config properties to the singleton
     *     Ext.apply(Ext.tip.QuickTipManager.getQuickTip(), {
     *         maxWidth: 200,
     *         minWidth: 100,
     *         showDelay: 50      // Show 50ms after entering target
     *     });
     *
     *     // Create a small panel to add a quick tip to
     *     Ext.create('Ext.container.Container', {
     *         id: 'quickTipContainer',
     *         width: 200,
     *         height: 150,
     *         style: {
     *             backgroundColor:'#000000'
     *         },
     *         renderTo: Ext.getBody()
     *     });
     *
     *
     *     // Manually register a quick tip for a specific element
     *     Ext.tip.QuickTipManager.register({
     *         target: 'quickTipContainer',
     *         title: 'My Tooltip',
     *         text: 'This tooltip was added in code',
     *         width: 100,
     *         dismissDelay: 10000 // Hide after 10 seconds hover
     *     });
     *
     * To register a quick tip in markup, you simply add one or more of the valid QuickTip
     * attributes prefixed with the **data-** namespace.  The HTML element itself is
     * automatically set as the quick tip target. Here is the summary of supported attributes
     * (optional unless otherwise noted):
     *
     *  - `hide`: Specifying "user" is equivalent to setting autoHide = false.
     *     Any other value will be the same as autoHide = true.
     *  - `qclass`: A CSS class to be applied to the quick tip
     *     (equivalent to the 'cls' target element config).
     *  - `qtip (required)`: The quick tip text (equivalent to the 'text' target element config).
     *  - `qtitle`: The quick tip title (equivalent to the 'title' target element config).
     *  - `qwidth`: The quick tip width (equivalent to the 'width' target element config).
     *
     * Here is an example of configuring an HTML element to display a tooltip from markup:
     *
     *     // Add a quick tip to an HTML button
     *     <input type="button" value="OK" data-qtitle="OK Button" data-qwidth="100"
     *          data-qtip="This is a quick tip from markup!"></input>
     *
     * @singleton
     */
    Ext.define('Ext.tip.QuickTipManager', {
        requires: ['Ext.tip.QuickTip'],
        singleton: true,
        alternateClassName: 'Ext.QuickTips',
        disabled: false,

        /**
         * Initializes the global QuickTips instance and prepare any quick tips.
         * @param {Boolean} [autoRender=true] True to render the QuickTips container
         * immediately to preload images.
         * @param {Object} [config] config object for the created QuickTip. By
         * default, the {@link Ext.tip.QuickTip QuickTip} class is instantiated, but this can
         * be changed by supplying an xtype property or a className property in this object.
         * All other properties on this object are configuration for the created component.
         */
        init : function (autoRender, config) {
            var me = this;

            if (!me.tip) {
                if (!Ext.isReady) {
                    Ext.onReady(function(){
                        Ext.tip.QuickTipManager.init(autoRender, config);
                    });
                    return;
                }

                var tipConfig = Ext.apply({ disabled: me.disabled, id: 'ext-quicktips-tip' }, config),
                    className = tipConfig.className,
                    xtype = tipConfig.xtype;

                if (className) {
                    delete tipConfig.className;
                } else if (xtype) {
                    className = 'widget.' + xtype;
                    delete tipConfig.xtype;
                }

                if (autoRender !== false) {
                    tipConfig.renderTo = document.body;

                    //<debug>
                    if (tipConfig.renderTo.tagName.toUpperCase() != 'BODY') { // e.g., == 'FRAMESET'
                        Ext.Error.raise({
                            sourceClass: 'Ext.tip.QuickTipManager',
                            sourceMethod: 'init',
                            msg: 'Cannot init QuickTipManager: no document body'
                        });
                    }
                    //</debug>
                }

                me.tip = Ext.create(className || 'Ext.tip.QuickTip', tipConfig);

                // private.
                // Need a globally accessble way of testing whether QuickTipsManager is both loaded AND initialized.
                Ext.quickTipsActive = true;
            }
        },

        /**
         * Destroys the QuickTips instance.
         */
        destroy: function() {
            Ext.destroy(this.tip);
            this.tip = undefined;
        },

        // Protected method called by the dd classes
        ddDisable : function() {
            var me = this,
                tip = me.tip;

            // don't disable it if we don't need to
            if (tip && !me.disabled) {
                tip.disable();
            }
        },

        // Protected method called by the dd classes
        ddEnable : function() {
            var me = this,
                tip = me.tip;

            // only enable it if it hasn't been disabled
            if (tip && !me.disabled) {
                tip.enable();
            }
        },

        /**
         * Enables quick tips globally.
         */
        enable : function(){
            var me = this,
                tip = me.tip;

            if (tip) {
                tip.enable();
            }
            me.disabled = false;
        },

        /**
         * Disables quick tips globally.
         */
        disable : function(){
            var me = this,
                tip = me.tip;

            if(tip){
                tip.disable();
            }
            me.disabled = true;
        },

        /**
         * Returns true if quick tips are enabled, else false.
         * @return {Boolean}
         */
        isEnabled : function(){
            var tip = this.tip;

            return tip !== undefined && !tip.disabled;
        },

        /**
         * Gets the single {@link Ext.tip.QuickTip QuickTip} instance used to show tips
         * from all registered elements.
         * @return {Ext.tip.QuickTip}
         */
        getQuickTip : function(){
            return this.tip;
        },

        /**
         * Configures a new quick tip instance and assigns it to a target element.  See
         * {@link Ext.tip.QuickTip#register} for details.
         * @param {Object} config The config object
         */
        register : function(){
            var tip = this.tip;

            tip.register.apply(tip, arguments);
        },

        /**
         * Removes any registered quick tip from the target element and destroys it.
         * @param {String/HTMLElement/Ext.Element} el The element from which the quick tip
         * is to be removed or ID of the element.
         */
        unregister : function(){
            var tip = this.tip;

            tip.unregister.apply(tip, arguments);
        },

        /**
         * Alias of {@link #register}.
         * @inheritdoc Ext.tip.QuickTipManager#register
         */
        tips : function(){
            var tip = this.tip;

            tip.register.apply(tip, arguments);
        }
    });