    /**
     * An Action is a piece of reusable functionality that can be abstracted out of any particular component so that it
     * can be usefully shared among multiple components.  Actions let you share handlers, configuration options and UI
     * updates across any components that support the Action interface (primarily {@link Ext.toolbar.Toolbar},
     * {@link Ext.button.Button} and {@link Ext.menu.Menu} components).
     *
     * Use a single Action instance as the config object for any number of UI Components which share the same configuration. The
     * Action not only supplies the configuration, but allows all Components based upon it to have a common set of methods
     * called at once through a single call to the Action.
     *
     * Any Component that is to be configured with an Action must also support
     * the following methods:
     *
     * - setText(string)
     * - setIconCls(string)
     * - setDisabled(boolean)
     * - setVisible(boolean)
     * - setHandler(function)
     *
     * This allows the Action to control its associated Components.
     *
     * Example usage:
     *
     *     // Define the shared Action.  Each Component below will have the same
     *     // display text and icon, and will display the same message on click.
     *     var action = new Ext.Action({
     *         {@link #text}: 'Do something',
     *         {@link #handler}: function(){
     *             Ext.Msg.alert('Click', 'You did something.');
     *         },
     *         {@link #iconCls}: 'do-something',
     *         {@link #itemId}: 'myAction'
     *     });
     *
     *     var panel = new Ext.panel.Panel({
     *         title: 'Actions',
     *         width: 500,
     *         height: 300,
     *         tbar: [
     *             // Add the Action directly to a toolbar as a menu button
     *             action,
     *             {
     *                 text: 'Action Menu',
     *                 // Add the Action to a menu as a text item
     *                 menu: [action]
     *             }
     *         ],
     *         items: [
     *             // Add the Action to the panel body as a standard button
     *             new Ext.button.Button(action)
     *         ],
     *         renderTo: Ext.getBody()
     *     });
     *
     *     // Change the text for all components using the Action
     *     action.setText('Something else');
     *
     *     // Reference an Action through a container using the itemId
     *     var btn = panel.getComponent('myAction');
     *     var aRef = btn.baseAction;
     *     aRef.setText('New text');
     */
    Ext.define('Ext.Action', {

        /* Begin Definitions */

        /* End Definitions */

        /**
         * @cfg {String} [text='']
         * The text to set for all components configured by this Action.
         */
        /**
         * @cfg {String} [iconCls='']
         * The CSS class selector that specifies a background image to be used as the header icon for
         * all components configured by this Action.
         *
         * An example of specifying a custom icon class would be something like:
         *
         *     // specify the property in the config for the class:
         *          ...
         *          iconCls: 'do-something'
         *
         *     // css class that specifies background image to be used as the icon image:
         *     .do-something { background-image: url(../images/my-icon.gif) 0 6px no-repeat !important; }
         */
        /**
         * @cfg {Boolean} [disabled=false]
         * True to disable all components configured by this Action, false to enable them.
         */
        /**
         * @cfg {Boolean} [hidden=false]
         * True to hide all components configured by this Action, false to show them.
         */
        /**
         * @cfg {Function} handler
         * The function that will be invoked by each component tied to this Action
         * when the component's primary event is triggered.
         */
        /**
         * @cfg {String} itemId
         * See {@link Ext.Component}.{@link Ext.Component#itemId itemId}.
         */
        /**
         * @cfg {Object} scope
         * The scope (this reference) in which the {@link #handler} is executed.
         * Defaults to the browser window.
         */

        /**
         * Creates new Action.
         * @param {Object} config Config object.
         */
        constructor : function(config){
            this.initialConfig = config;
            this.itemId = config.itemId = (config.itemId || config.id || Ext.id());
            this.items = [];
        },

        /*
         * @property {Boolean} isAction
         * `true` in this class to identify an object as an instantiated Action, or subclass thereof.
         */
        isAction : true,

        /**
         * Sets the text to be displayed by all components configured by this Action.
         * @param {String} text The text to display
         */
        setText : function(text){
            this.initialConfig.text = text;
            this.callEach('setText', [text]);
        },

        /**
         * Gets the text currently displayed by all components configured by this Action.
         */
        getText : function(){
            return this.initialConfig.text;
        },

        /**
         * Sets the icon CSS class for all components configured by this Action.  The class should supply
         * a background image that will be used as the icon image.
         * @param {String} cls The CSS class supplying the icon image
         */
        setIconCls : function(cls){
            this.initialConfig.iconCls = cls;
            this.callEach('setIconCls', [cls]);
        },

        /**
         * Gets the icon CSS class currently used by all components configured by this Action.
         */
        getIconCls : function(){
            return this.initialConfig.iconCls;
        },

        /**
         * Sets the disabled state of all components configured by this Action.  Shortcut method
         * for {@link #enable} and {@link #disable}.
         * @param {Boolean} disabled True to disable the component, false to enable it
         */
        setDisabled : function(v){
            this.initialConfig.disabled = v;
            this.callEach('setDisabled', [v]);
        },

        /**
         * Enables all components configured by this Action.
         */
        enable : function(){
            this.setDisabled(false);
        },

        /**
         * Disables all components configured by this Action.
         */
        disable : function(){
            this.setDisabled(true);
        },

        /**
         * Returns true if the components using this Action are currently disabled, else returns false.
         */
        isDisabled : function(){
            return this.initialConfig.disabled;
        },

        /**
         * Sets the hidden state of all components configured by this Action.  Shortcut method
         * for `{@link #hide}` and `{@link #show}`.
         * @param {Boolean} hidden True to hide the component, false to show it.
         */
        setHidden : function(v){
            this.initialConfig.hidden = v;
            this.callEach('setVisible', [!v]);
        },

        /**
         * Shows all components configured by this Action.
         */
        show : function(){
            this.setHidden(false);
        },

        /**
         * Hides all components configured by this Action.
         */
        hide : function(){
            this.setHidden(true);
        },

        /**
         * Returns true if the components configured by this Action are currently hidden, else returns false.
         */
        isHidden : function(){
            return this.initialConfig.hidden;
        },

        /**
         * Sets the function that will be called by each Component using this action when its primary event is triggered.
         * @param {Function} fn The function that will be invoked by the action's components.  The function
         * will be called with no arguments.
         * @param {Object} scope The scope (this reference) in which the function is executed. Defaults to the Component
         * firing the event.
         */
        setHandler : function(fn, scope){
            this.initialConfig.handler = fn;
            this.initialConfig.scope = scope;
            this.callEach('setHandler', [fn, scope]);
        },

        /**
         * Executes the specified function once for each Component currently tied to this Action.  The function passed
         * in should accept a single argument that will be an object that supports the basic Action config/method interface.
         * @param {Function} fn The function to execute for each component
         * @param {Object} scope The scope (this reference) in which the function is executed.
         * Defaults to the Component.
         */
        each : function(fn, scope){
            Ext.each(this.items, fn, scope);
        },

        // private
        callEach : function(fnName, args){
            var items = this.items,
                i = 0,
                len = items.length,
                item;

            Ext.suspendLayouts();
            for(; i < len; i++){
                item = items[i];
                item[fnName].apply(item, args);
            }
            Ext.resumeLayouts(true);
        },

        // private
        addComponent : function(comp){
            this.items.push(comp);
            comp.on('destroy', this.removeComponent, this);
        },

        // private
        removeComponent : function(comp){
            Ext.Array.remove(this.items, comp);
        },

        /**
         * Executes this Action manually using the handler function specified in the original config object
         * or the handler function set with {@link #setHandler}.  Any arguments passed to this
         * function will be passed on to the handler function.
         * @param {Object...} args Variable number of arguments passed to the handler function
         */
        execute : function(){
            this.initialConfig.handler.apply(this.initialConfig.scope || Ext.global, arguments);
        }
    });