    /**
     * @class Ext.tip.QuickTip
     * @extends Ext.tip.ToolTip
     * A specialized tooltip class for tooltips that can be specified in markup and automatically managed by the global
     * {@link Ext.tip.QuickTipManager} instance.  See the QuickTipManager documentation for additional usage details and examples.
     * @xtype quicktip
     */
    Ext.define('Ext.tip.QuickTip', {
        extend: 'Ext.tip.ToolTip',
        alternateClassName: 'Ext.QuickTip',
        /**
         * @cfg {String/HTMLElement/Ext.Element} target The target HTMLElement, Ext.Element or id to associate with this Quicktip (defaults to the document).
         */
        /**
         * @cfg {Boolean} interceptTitles True to automatically use the element's DOM title value if available.
         */
        interceptTitles : false,

        // Force creation of header Component
        title: '&#160;',

        // private
        tagConfig : {
            namespace : "data-",
            attribute : "qtip",
            width : "qwidth",
            target : "target",
            title : "qtitle",
            hide : "hide",
            cls : "qclass",
            align : "qalign",
            anchor : "anchor"
        },

        // private
        initComponent : function(){
            var me = this;

            me.target = me.target || Ext.getDoc();
            me.targets = me.targets || {};
            me.callParent();
        },

        /**
         * Configures a new quick tip instance and assigns it to a target element.  The following config values are
         * supported (for example usage, see the {@link Ext.tip.QuickTipManager} class header):
         * <div class="mdetail-params"><ul>
         * <li>autoHide</li>
         * <li>cls</li>
         * <li>dismissDelay (overrides the singleton value)</li>
         * <li>target (required)</li>
         * <li>text (required)</li>
         * <li>title</li>
         * <li>width</li></ul></div>
         * @param {Object} config The config object
         */
        register : function(config){
            var configs = Ext.isArray(config) ? config : arguments,
                i = 0,
                len = configs.length,
                target, j, targetLen;

            for (; i < len; i++) {
                config = configs[i];
                target = config.target;
                if (target) {
                    if (Ext.isArray(target)) {
                        for (j = 0, targetLen = target.length; j < targetLen; j++) {
                            this.targets[Ext.id(target[j])] = config;
                        }
                    } else{
                        this.targets[Ext.id(target)] = config;
                    }
                }
            }
        },

        /**
         * Removes this quick tip from its 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(el){
            delete this.targets[Ext.id(el)];
        },

        /**
         * Hides a visible tip or cancels an impending show for a particular element.
         * @param {String/HTMLElement/Ext.Element} el The element that is the target of the tip or ID of the element.
         */
        cancelShow: function(el){
            var me = this,
                activeTarget = me.activeTarget;

            el = Ext.get(el).dom;
            if (me.isVisible()) {
                if (activeTarget && activeTarget.el == el) {
                    me.hide();
                }
            } else if (activeTarget && activeTarget.el == el) {
                me.clearTimer('show');
            }
        },

        /**
         * @private
         * Reads the tip text from the closest node to the event target which contains the attribute we
         * are configured to look for. Returns an object containing the text from the attribute, and the target element from
         * which the text was read.
         */
        getTipCfg: function(e) {
            var t = e.getTarget(),
                titleText = t.title,
                cfg;

            if (this.interceptTitles && titleText && Ext.isString(titleText)) {
                t.qtip = titleText;
                t.removeAttribute("title");
                e.preventDefault();
                return {
                    text: titleText
                };
            }
            else {
                cfg = this.tagConfig;
                t = e.getTarget('[' + cfg.namespace + cfg.attribute + ']');
                if (t) {
                    return {
                        target: t,
                        text: t.getAttribute(cfg.namespace + cfg.attribute)
                    };
                }
            }
        },

        // private
        onTargetOver : function(e){
            var me = this,
                target = e.getTarget(),
                elTarget,
                cfg,
                ns,
                tipConfig,
                autoHide;

            if (me.disabled) {
                return;
            }

            // TODO - this causes "e" to be recycled in IE6/7 (EXTJSIV-1608) so ToolTip#setTarget
            // was changed to include freezeEvent. The issue seems to be a nested 'resize' event
            // that smashed Ext.EventObject.
            me.targetXY = e.getXY();

            if(!target || target.nodeType !== 1 || target == document || target == document.body){
                return;
            }

            if (me.activeTarget && ((target == me.activeTarget.el) || Ext.fly(me.activeTarget.el).contains(target))) {
                me.clearTimer('hide');
                me.show();
                return;
            }

            if (target) {
                Ext.Object.each(me.targets, function(key, value) {
                    var targetEl = Ext.fly(value.target);
                    if (targetEl && (targetEl.dom === target || targetEl.contains(target))) {
                        elTarget = targetEl.dom;
                        return false;
                    }
                });
                if (elTarget) {
                    me.activeTarget = me.targets[elTarget.id];
                    me.activeTarget.el = target;
                    me.anchor = me.activeTarget.anchor;
                    if (me.anchor) {
                        me.anchorTarget = target;
                    }
                    me.delayShow();
                    return;
                }
            }

            elTarget = Ext.get(target);
            cfg = me.tagConfig;
            ns = cfg.namespace;
            tipConfig = me.getTipCfg(e);

            if (tipConfig) {

                // getTipCfg may look up the parentNode axis for a tip text attribute and will return the new target node.
                // Change our target element to match that from which the tip text attribute was read.
                if (tipConfig.target) {
                    target = tipConfig.target;
                    elTarget = Ext.get(target);
                }
                autoHide = elTarget.getAttribute(ns + cfg.hide);

                me.activeTarget = {
                    el: target,
                    text: tipConfig.text,
                    width: +elTarget.getAttribute(ns + cfg.width) || null,
                    autoHide: autoHide != "user" && autoHide !== 'false',
                    title: elTarget.getAttribute(ns + cfg.title),
                    cls: elTarget.getAttribute(ns + cfg.cls),
                    align: elTarget.getAttribute(ns + cfg.align)

                };
                me.anchor = elTarget.getAttribute(ns + cfg.anchor);
                if (me.anchor) {
                    me.anchorTarget = target;
                }
                me.delayShow();
            }
        },

        // private
        onTargetOut : function(e){
            var me = this;

            // If moving within the current target, and it does not have a new tip, ignore the mouseout
            if (me.activeTarget && e.within(me.activeTarget.el) && !me.getTipCfg(e)) {
                return;
            }

            me.clearTimer('show');
            if (me.autoHide !== false) {
                me.delayHide();
            }
        },

        // inherit docs
        showAt : function(xy){
            var me = this,
                target = me.activeTarget;

            if (target) {
                if (!me.rendered) {
                    me.render(Ext.getBody());
                    me.activeTarget = target;
                }
                if (target.title) {
                    me.setTitle(target.title || '');
                    me.header.show();
                } else {
                    me.header.hide();
                }
                me.body.update(target.text);
                me.autoHide = target.autoHide;
                me.dismissDelay = target.dismissDelay || me.dismissDelay;
                if (me.lastCls) {
                    me.el.removeCls(me.lastCls);
                    delete me.lastCls;
                }
                if (target.cls) {
                    me.el.addCls(target.cls);
                    me.lastCls = target.cls;
                }

                me.setWidth(target.width);

                if (me.anchor) {
                    me.constrainPosition = false;
                } else if (target.align) { // TODO: this doesn't seem to work consistently
                    xy = me.el.getAlignToXY(target.el, target.align);
                    me.constrainPosition = false;
                }else{
                    me.constrainPosition = true;
                }
            }
            me.callParent([xy]);
        },

        // inherit docs
        hide: function(){
            delete this.activeTarget;
            this.callParent();
        }
    });