    /**
     * @class Ext.tip.QuickTipManager
     *
     * 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:
     *
     * {@img Ext.tip.QuickTipManager/Ext.tip.QuickTipManager.png Ext.tip.QuickTipManager component}
     *
     * ## Code
     *
     *     // 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', function() {
        var tip,
            disabled = false;

        return {
            requires: ['Ext.tip.QuickTip'],
            singleton: true,
            alternateClassName: 'Ext.QuickTips',

            /**
             * Initialize the global QuickTips instance and prepare any quick tips.
             * @param {Boolean} autoRender True to render the QuickTips container immediately to
             * preload images. (Defaults to true)
             * @param {Object} config An optional 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) {
                if (!tip) {
                    if (!Ext.isReady) {
                        Ext.onReady(function(){
                            Ext.tip.QuickTipManager.init(autoRender);
                        });
                        return;
                    }

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

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

            /**
             * Destroy the QuickTips instance.
             */
            destroy: function() {
                if (tip) {
                    var undef;
                    tip.destroy();
                    tip = undef;
                }
            },

            // Protected method called by the dd classes
            ddDisable : function(){
                // don't disable it if we don't need to
                if(tip && !disabled){
                    tip.disable();
                }
            },

            // Protected method called by the dd classes
            ddEnable : function(){
                // only enable it if it hasn't been disabled
                if(tip && !disabled){
                    tip.enable();
                }
            },

            /**
             * Enable quick tips globally.
             */
            enable : function(){
                if(tip){
                    tip.enable();
                }
                disabled = false;
            },

            /**
             * Disable quick tips globally.
             */
            disable : function(){
                if(tip){
                    tip.disable();
                }
                disabled = true;
            },

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

            /**
             * Removes any registered quick tip from the target element and destroys it.
             * @param {String/HTMLElement/Element} el The element from which the quick tip is to be removed.
             */
            unregister : function(){
                tip.unregister.apply(tip, arguments);
            },

            /**
             * Alias of {@link #register}.
             * @param {Object} config The config object
             */
            tips : function(){
                tip.register.apply(tip, arguments);
            }
        };
    }());