    /**
     * Plugin for adding a close context menu to tabs. Note that the menu respects
     * the closable configuration on the tab. As such, commands like remove others
     * and remove all will not remove items that are not closable.
     */
    Ext.define('Ext.ux.TabCloseMenu', {
        alias: 'plugin.tabclosemenu',

        mixins: {
            observable: 'Ext.util.Observable'
        },

        /**
         * @cfg {String} closeTabText
         * The text for closing the current tab.
         */
        closeTabText: 'Close Tab',

        /**
         * @cfg {Boolean} showCloseOthers
         * Indicates whether to show the 'Close Others' option.
         */
        showCloseOthers: true,

        /**
         * @cfg {String} closeOthersTabsText
         * The text for closing all tabs except the current one.
         */
        closeOthersTabsText: 'Close Other Tabs',

        /**
         * @cfg {Boolean} showCloseAll
         * Indicates whether to show the 'Close All' option.
         */
        showCloseAll: true,

        /**
         * @cfg {String} closeAllTabsText
         * <p>The text for closing all tabs.
         */
        closeAllTabsText: 'Close All Tabs',

        /**
         * @cfg {Array} extraItemsHead
         * An array of additional context menu items to add to the front of the context menu.
         */
        extraItemsHead: null,

        /**
         * @cfg {Array} extraItemsTail
         * An array of additional context menu items to add to the end of the context menu.
         */
        extraItemsTail: null,

        //public
        constructor: function (config) {
            this.addEvents(
                'aftermenu',
                'beforemenu');

            this.mixins.observable.constructor.call(this, config);
        },

        init : function(tabpanel){
            this.tabPanel = tabpanel;
            this.tabBar = tabpanel.down("tabbar");

            this.mon(this.tabPanel, {
                scope: this,
                afterlayout: this.onAfterLayout,
                single: true
            });
        },

        onAfterLayout: function() {
            this.mon(this.tabBar.el, {
                scope: this,
                contextmenu: this.onContextMenu,
                delegate: 'div.x-tab'
            });
        },

        onBeforeDestroy : function(){
            Ext.destroy(this.menu);
            this.callParent(arguments);
        },

        // private
        onContextMenu : function(event, target){
            var me = this,
                menu = me.createMenu(),
                disableAll = true,
                disableOthers = true,
                tab = me.tabBar.getChildByElement(target),
                index = me.tabBar.items.indexOf(tab);

            me.item = me.tabPanel.getComponent(index);
            menu.child('*[text="' + me.closeTabText + '"]').setDisabled(!me.item.closable);

            if (me.showCloseAll || me.showCloseOthers) {
                me.tabPanel.items.each(function(item) {
                    if (item.closable) {
                        disableAll = false;
                        if (item != me.item) {
                            disableOthers = false;
                            return false;
                        }
                    }
                    return true;
                });

                if (me.showCloseAll) {
                    menu.child('*[text="' + me.closeAllTabsText + '"]').setDisabled(disableAll);
                }

                if (me.showCloseOthers) {
                    menu.child('*[text="' + me.closeOthersTabsText + '"]').setDisabled(disableOthers);
                }
            }

            event.preventDefault();
            me.fireEvent('beforemenu', menu, me.item, me);

            menu.showAt(event.getXY());
        },

        createMenu : function() {
            var me = this;

            if (!me.menu) {
                var items = [{
                    text: me.closeTabText,
                    scope: me,
                    handler: me.onClose
                }];

                if (me.showCloseAll || me.showCloseOthers) {
                    items.push('-');
                }

                if (me.showCloseOthers) {
                    items.push({
                        text: me.closeOthersTabsText,
                        scope: me,
                        handler: me.onCloseOthers
                    });
                }

                if (me.showCloseAll) {
                    items.push({
                        text: me.closeAllTabsText,
                        scope: me,
                        handler: me.onCloseAll
                    });
                }

                if (me.extraItemsHead) {
                    items = me.extraItemsHead.concat(items);
                }

                if (me.extraItemsTail) {
                    items = items.concat(me.extraItemsTail);
                }

                me.menu = Ext.create('Ext.menu.Menu', {
                    items: items,
                    listeners: {
                        hide: me.onHideMenu,
                        scope: me
                    }
                });
            }

            return me.menu;
        },

        onHideMenu: function () {
            var me = this;

            me.item = null;
            me.fireEvent('aftermenu', me.menu, me);
        },

        onClose : function(){
            this.tabPanel.remove(this.item);
        },

        onCloseOthers : function(){
            this.doClose(true);
        },

        onCloseAll : function(){
            this.doClose(false);
        },

        doClose : function(excludeActive){
            var items = [];

            this.tabPanel.items.each(function(item){
                if(item.closable){
                    if(!excludeActive || item != this.item){
                        items.push(item);
                    }
                }
            }, this);

            Ext.each(items, function(item){
                this.tabPanel.remove(item);
            }, this);
        }
    });