/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/

/**
 * An abstract base class which provides shared methods for Components across the Sencha product line.
 *
 * Please refer to sub class's documentation.
 * @private
 */
Ext.define('Ext.AbstractComponent', {

    /* Begin Definitions */
    requires: [
        'Ext.ComponentQuery',
        'Ext.ComponentManager',
        'Ext.util.ProtoElement',
        'Ext.dom.CompositeElement',
        'Ext.PluginManager'
    ],

    mixins: {
        positionable: 'Ext.util.Positionable',
        observable: 'Ext.util.Observable',
        animate: 'Ext.util.Animate',
        elementCt: 'Ext.util.ElementContainer',
        renderable: 'Ext.util.Renderable',
        state: 'Ext.state.Stateful'
    },

    // The "uses" property specifies class which are used in an instantiated AbstractComponent.
    // They do *not* have to be loaded before this class may be defined - that is what "requires" is for.
    uses: [
        'Ext.PluginManager',
        'Ext.Element',
        'Ext.DomHelper',
        'Ext.XTemplate',
        'Ext.ComponentLoader',
        'Ext.EventManager',
        'Ext.layout.Context',
        'Ext.layout.Layout',
        'Ext.layout.component.Auto',
        'Ext.LoadMask',
        'Ext.ZIndexManager'
    ],

    statics: {
        AUTO_ID: 1000,

        pendingLayouts: null,

        layoutSuspendCount: 0,

        /**
         * Cancels layout of a component.
         * @param {Ext.Component} comp
         */
        cancelLayout: function(comp, isDestroying) {
            var context = this.runningLayoutContext || this.pendingLayouts;

            if (context) {
                context.cancelComponent(comp, false, isDestroying);
            }
        },

        /**
         * Performs all pending layouts that were scheduled while
         * {@link Ext.AbstractComponent#suspendLayouts suspendLayouts} was in effect.
         * @static
         */
        flushLayouts: function () {
            var me = this,
                context = me.pendingLayouts;

            if (context && context.invalidQueue.length) {
                me.pendingLayouts = null;
                me.runningLayoutContext = context;

                Ext.override(context, {
                    runComplete: function () {
                        // we need to release the layout queue before running any of the
                        // finishedLayout calls because they call afterComponentLayout
                        // which can re-enter by calling doLayout/doComponentLayout.
                        me.runningLayoutContext = null;
                         
                        var result = this.callParent(); // not "me" here!
                        if (Ext.globalEvents.hasListeners.afterlayout) {                            
                            Ext.globalEvents.fireEvent('afterlayout');
                        }
                        return result;
                    }
                });

                context.run();
            }
        },

        /**
         * Resumes layout activity in the whole framework.
         *
         * {@link Ext#suspendLayouts} is alias of {@link Ext.AbstractComponent#suspendLayouts}.
         *
         * @param {Boolean} [flush=false] `true` to perform all the pending layouts. This can also be
         * achieved by calling {@link Ext.AbstractComponent#flushLayouts flushLayouts} directly.
         * @static
         */
        resumeLayouts: function (flush) {
            if (this.layoutSuspendCount && ! --this.layoutSuspendCount) {
                if (flush) {
                    this.flushLayouts();
                }
                if (Ext.globalEvents.hasListeners.resumelayouts) {
                    Ext.globalEvents.fireEvent('resumelayouts');
                }
            }
        },

        /**
         * Stops layouts from happening in the whole framework.
         *
         * It's useful to suspend the layout activity while updating multiple components and
         * containers:
         *
         *     Ext.suspendLayouts();
         *     // batch of updates...
         *     Ext.resumeLayouts(true);
         *
         * {@link Ext#suspendLayouts} is alias of {@link Ext.AbstractComponent#suspendLayouts}.
         *
         * See also {@link Ext#batchLayouts} for more abstract way of doing this.
         *
         * @static
         */
        suspendLayouts: function () {
            ++this.layoutSuspendCount;
        },

        /**
         * Updates layout of a component.
         *
         * @param {Ext.Component} comp The component to update.
         * @param {Boolean} [defer=false] `true` to just queue the layout if this component.
         * @static
         */
        updateLayout: function (comp, defer) {
            var me = this,
                running = me.runningLayoutContext,
                pending;

            if (running) {
                running.queueInvalidate(comp);
            } else {
                pending = me.pendingLayouts || (me.pendingLayouts = new Ext.layout.Context());
                pending.queueInvalidate(comp);

                if (!defer && !me.layoutSuspendCount && !comp.isLayoutSuspended()) {
                    me.flushLayouts();
                }
            }
        }
    },

    /* End Definitions */

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

    /**
     * @private
     */
    getAutoId: function() {
        this.autoGenId = true;
        return ++Ext.AbstractComponent.AUTO_ID;
    },

    deferLayouts: false,

    /**
     * @cfg {String} id
     * The **unique id of this component instance.**
     *
     * It should not be necessary to use this configuration except for singleton objects in your application. Components
     * created with an `id` may be accessed globally using {@link Ext#getCmp Ext.getCmp}.
     *
     * Instead of using assigned ids, use the {@link #itemId} config, and {@link Ext.ComponentQuery ComponentQuery}
     * which provides selector-based searching for Sencha Components analogous to DOM querying. The {@link
     * Ext.container.Container Container} class contains {@link Ext.container.Container#down shortcut methods} to query
     * its descendant Components by selector.
     *
     * Note that this `id` will also be used as the element id for the containing HTML element that is rendered to the
     * page for this component. This allows you to write id-based CSS rules to style the specific instance of this
     * component uniquely, and also to select sub-elements using this component's `id` as the parent.
     *
     * **Note:** To avoid complications imposed by a unique `id` also see `{@link #itemId}`.
     *
     * **Note:** To access the container of a Component see `{@link #ownerCt}`.
     *
     * Defaults to an {@link #getId auto-assigned id}.
     *
     * @since 1.1.0
     */

     /**
     * @property {Boolean} autoGenId
     * `true` indicates an `id` was auto-generated rather than provided by configuration.
     * @private
     */
    autoGenId: false,

    /**
     * @cfg {String} itemId
     * An `itemId` can be used as an alternative way to get a reference to a component when no object reference is
     * available. Instead of using an `{@link #id}` with {@link Ext}.{@link Ext#getCmp getCmp}, use `itemId` with
     * {@link Ext.container.Container}.{@link Ext.container.Container#getComponent getComponent} which will retrieve
     * `itemId`'s or {@link #id}'s. Since `itemId`'s are an index to the container's internal MixedCollection, the
     * `itemId` is scoped locally to the container -- avoiding potential conflicts with {@link Ext.ComponentManager}
     * which requires a **unique** `{@link #id}`.
     *
     *     var c = new Ext.panel.Panel({ //
     *         {@link Ext.Component#height height}: 300,
     *         {@link #renderTo}: document.body,
     *         {@link Ext.container.Container#layout layout}: 'auto',
     *         {@link Ext.container.Container#cfg-items items}: [
     *             {
     *                 itemId: 'p1',
     *                 {@link Ext.panel.Panel#title title}: 'Panel 1',
     *                 {@link Ext.Component#height height}: 150
     *             },
     *             {
     *                 itemId: 'p2',
     *                 {@link Ext.panel.Panel#title title}: 'Panel 2',
     *                 {@link Ext.Component#height height}: 150
     *             }
     *         ]
     *     })
     *     p1 = c.{@link Ext.container.Container#getComponent getComponent}('p1'); // not the same as {@link Ext#getCmp Ext.getCmp()}
     *     p2 = p1.{@link #ownerCt}.{@link Ext.container.Container#getComponent getComponent}('p2'); // reference via a sibling
     *
     * Also see {@link #id}, `{@link Ext.container.Container#query}`, `{@link Ext.container.Container#down}` and
     * `{@link Ext.container.Container#child}`.
     *
     * **Note**: to access the container of an item see {@link #ownerCt}.
     *
     * @since 3.4.0
     */

    /**
     * @property {Ext.Container} ownerCt
     * This Component's owner {@link Ext.container.Container Container} (is set automatically
     * when this Component is added to a Container).
     *
     * *Important.* This is not a universal upwards navigation pointer. It indicates the Container which owns and manages
     * this Component if any. There are other similar relationships such as the {@link Ext.button.Button button} which activates a {@link Ext.button.Button#cfg-menu menu}, or the
     * {@link Ext.menu.Item menu item} which activated a {@link Ext.menu.Item#cfg-menu submenu}, or the
     * {@link Ext.grid.column.Column column header} which activated the column menu.
     *
     * These differences are abstracted away by the {@link #up} method.
     *
     * **Note**: to access items within the Container see {@link #itemId}.
     * @readonly
     * @since 2.3.0
     */

    /**
     * @cfg {String/Object} autoEl
     * A tag name or {@link Ext.DomHelper DomHelper} spec used to create the {@link #getEl Element} which will
     * encapsulate this Component.
     *
     * You do not normally need to specify this. For the base classes {@link Ext.Component} and
     * {@link Ext.container.Container}, this defaults to **'div'**. The more complex Sencha classes use a more
     * complex DOM structure specified by their own {@link #renderTpl}s.
     *
     * This is intended to allow the developer to create application-specific utility Components encapsulated by
     * different DOM elements. Example usage:
     *
     *     {
     *         xtype: 'component',
     *         autoEl: {
     *             tag: 'img',
     *             src: 'http://www.example.com/example.jpg'
     *         }
     *     }, {
     *         xtype: 'component',
     *         autoEl: {
     *             tag: 'blockquote',
     *             html: 'autoEl is cool!'
     *         }
     *     }, {
     *         xtype: 'container',
     *         autoEl: 'ul',
     *         cls: 'ux-unordered-list',
     *         items: {
     *             xtype: 'component',
     *             autoEl: 'li',
     *             html: 'First list item'
     *         }
     *     }
     *
     * @since 2.3.0
     */

    /**
     * @cfg {Ext.XTemplate/String/String[]} renderTpl
     * An {@link Ext.XTemplate XTemplate} used to create the internal structure inside this Component's encapsulating
     * {@link #getEl Element}.
     *
     * You do not normally need to specify this. For the base classes {@link Ext.Component} and
     * {@link Ext.container.Container}, this defaults to **`null`** which means that they will be initially rendered
     * with no internal structure; they render their {@link #getEl Element} empty. The more specialized Ext JS and Sencha Touch
     * classes which use a more complex DOM structure, provide their own template definitions.
     *
     * This is intended to allow the developer to create application-specific utility Components with customized
     * internal structure.
     *
     * Upon rendering, any created child elements may be automatically imported into object properties using the
     * {@link #renderSelectors} and {@link #cfg-childEls} options.
     * @protected
     */
    renderTpl: '{%this.renderContent(out,values)%}',

    /**
     * @cfg {Object} renderData
     *
     * The data used by {@link #renderTpl} in addition to the following property values of the component:
     *
     * - id
     * - ui
     * - uiCls
     * - baseCls
     * - componentCls
     * - frame
     *
     * See {@link #renderSelectors} and {@link #cfg-childEls} for usage examples.
     */

    /**
     * @cfg {Object} renderSelectors
     * An object containing properties specifying {@link Ext.DomQuery DomQuery} selectors which identify child elements
     * created by the render process.
     *
     * After the Component's internal structure is rendered according to the {@link #renderTpl}, this object is iterated through,
     * and the found Elements are added as properties to the Component using the `renderSelector` property name.
     *
     * For example, a Component which renders a title and description into its element:
     *
     *     Ext.create('Ext.Component', {
     *         renderTo: Ext.getBody(),
     *         renderTpl: [
     *             '<h1 class="title">{title}</h1>',
     *             '<p>{desc}</p>'
     *         ],
     *         renderData: {
     *             title: "Error",
     *             desc: "Something went wrong"
     *         },
     *         renderSelectors: {
     *             titleEl: 'h1.title',
     *             descEl: 'p'
     *         },
     *         listeners: {
     *             afterrender: function(cmp){
     *                 // After rendering the component will have a titleEl and descEl properties
     *                 cmp.titleEl.setStyle({color: "red"});
     *             }
     *         }
     *     });
     *
     * For a faster, but less flexible, alternative that achieves the same end result (properties for child elements on the
     * Component after render), see {@link #cfg-childEls} and {@link #addChildEls}.
     */

    /**
     * @cfg {Object[]} childEls
     * An array describing the child elements of the Component. Each member of the array
     * is an object with these properties:
     *
     * - `name` - The property name on the Component for the child element.
     * - `itemId` - The id to combine with the Component's id that is the id of the child element.
     * - `id` - The id of the child element.
     *
     * If the array member is a string, it is equivalent to `{ name: m, itemId: m }`.
     *
     * For example, a Component which renders a title and body text:
     *
     *     @example
     *     Ext.create('Ext.Component', {
     *         renderTo: Ext.getBody(),
     *         renderTpl: [
     *             '<h1 id="{id}-title">{title}</h1>',
     *             '<p>{msg}</p>',
     *         ],
     *         renderData: {
     *             title: "Error",
     *             msg: "Something went wrong"
     *         },
     *         childEls: ["title"],
     *         listeners: {
     *             afterrender: function(cmp){
     *                 // After rendering the component will have a title property
     *                 cmp.title.setStyle({color: "red"});
     *             }
     *         }
     *     });
     *
     * A more flexible, but somewhat slower, approach is {@link #renderSelectors}.
     */

    /**
     * @cfg {String/HTMLElement/Ext.Element} renderTo
     * Specify the `id` of the element, a DOM element or an existing Element that this component will be rendered into.
     *
     * **Notes:**
     *
     * Do *not* use this option if the Component is to be a child item of a {@link Ext.container.Container Container}.
     * It is the responsibility of the {@link Ext.container.Container Container}'s
     * {@link Ext.container.Container#layout layout manager} to render and manage its child items.
     *
     * When using this config, a call to `render()` is not required.
     *
     * See also: {@link #method-render}.
     *
     * @since 2.3.0
     */

    /**
     * @cfg {Boolean} frame
     * Specify as `true` to have the Component inject framing elements within the Component at render time to provide a
     * graphical rounded frame around the Component content.
     *
     * This is only necessary when running on outdated, or non standard-compliant browsers such as Microsoft's Internet
     * Explorer prior to version 9 which do not support rounded corners natively.
     *
     * The extra space taken up by this framing is available from the read only property {@link #frameSize}.
     */

    /**
     * @property {Object} frameSize
     * @readonly
     * Indicates the width of any framing elements which were added within the encapsulating
     * element to provide graphical, rounded borders. See the {@link #frame} config. This
     * property is `null` if the component is not framed.
     *
     * This is an object containing the frame width in pixels for all four sides of the
     * Component containing the following properties:
     *
     * @property {Number} [frameSize.top=0] The width of the top framing element in pixels.
     * @property {Number} [frameSize.right=0] The width of the right framing element in pixels.
     * @property {Number} [frameSize.bottom=0] The width of the bottom framing element in pixels.
     * @property {Number} [frameSize.left=0] The width of the left framing element in pixels.
     * @property {Number} [frameSize.width=0] The total width of the left and right framing elements in pixels.
     * @property {Number} [frameSize.height=0] The total height of the top and right bottom elements in pixels.
     */
    frameSize: null,

    /**
     * @cfg {String/Object} componentLayout
     * The sizing and positioning of a Component's internal Elements is the responsibility of the Component's layout
     * manager which sizes a Component's internal structure in response to the Component being sized.
     *
     * Generally, developers will not use this configuration as all provided Components which need their internal
     * elements sizing (Such as {@link Ext.form.field.Base input fields}) come with their own componentLayout managers.
     *
     * The {@link Ext.layout.container.Auto default layout manager} will be used on instances of the base Ext.Component
     * class which simply sizes the Component's encapsulating element to the height and width specified in the
     * {@link #setSize} method.
     */

    /**
     * @cfg {Ext.XTemplate/Ext.Template/String/String[]} tpl
     * An {@link Ext.Template}, {@link Ext.XTemplate} or an array of strings to form an Ext.XTemplate. Used in
     * conjunction with the `{@link #data}` and `{@link #tplWriteMode}` configurations.
     *
     * @since 3.4.0
     */

    /**
     * @cfg {Object} data
     * The initial set of data to apply to the `{@link #tpl}` to update the content area of the Component.
     *
     * @since 3.4.0
     */

    /**
     * @cfg {Ext.enums.Widget} xtype
     * This property provides a shorter alternative to creating objects than using a full
     * class name. Using `xtype` is the most common way to define component instances,
     * especially in a container. For example, the items in a form containing text fields
     * could be created explicitly like so:
     *
     *      items: [
     *          Ext.create('Ext.form.field.Text', {
     *              fieldLabel: 'Foo'
     *          }),
     *          Ext.create('Ext.form.field.Text', {
     *              fieldLabel: 'Bar'
     *          }),
     *          Ext.create('Ext.form.field.Number', {
     *              fieldLabel: 'Num'
     *          })
     *      ]
     *
     * But by using `xtype`, the above becomes:
     *
     *      items: [
     *          {
     *              xtype: 'textfield',
     *              fieldLabel: 'Foo'
     *          },
     *          {
     *              xtype: 'textfield',
     *              fieldLabel: 'Bar'
     *          },
     *          {
     *              xtype: 'numberfield',
     *              fieldLabel: 'Num'
     *          }
     *      ]
     *
     * When the `xtype` is common to many items, {@link Ext.container.AbstractContainer#defaultType}
     * is another way to specify the `xtype` for all items that don't have an explicit `xtype`:
     *
     *      defaultType: 'textfield',
     *      items: [
     *          { fieldLabel: 'Foo' },
     *          { fieldLabel: 'Bar' },
     *          { fieldLabel: 'Num', xtype: 'numberfield' }
     *      ]
     *
     * Each member of the `items` array is now just a "configuration object". These objects
     * are used to create and configure component instances. A configuration object can be
     * manually used to instantiate a component using {@link Ext#widget}:
     *
     *      var text1 = Ext.create('Ext.form.field.Text', {
     *          fieldLabel: 'Foo'
     *      });
     *
     *      // or alternatively:
     *
     *      var text1 = Ext.widget({
     *          xtype: 'textfield',
     *          fieldLabel: 'Foo'
     *      });
     *
     * This conversion of configuration objects into instantiated components is done when
     * a container is created as part of its {Ext.container.AbstractContainer#initComponent}
     * process. As part of the same process, the `items` array is converted from its raw
     * array form into a {@link Ext.util.MixedCollection} instance.
     *
     * You can define your own `xtype` on a custom {@link Ext.Component component} by specifying
     * the `xtype` property in {@link Ext#define}. For example:
     *
     *     Ext.define('MyApp.PressMeButton', {
     *         extend: 'Ext.button.Button',
     *         xtype: 'pressmebutton',
     *         text: 'Press Me'
     *     });
     *
     * Care should be taken when naming an `xtype` in a custom component because there is
     * a single, shared scope for all xtypes. Third part components should consider using
     * a prefix to avoid collisions.
     *
     *     Ext.define('Foo.form.CoolButton', {
     *         extend: 'Ext.button.Button',
     *         xtype: 'ux-coolbutton',
     *         text: 'Cool!'
     *     });
     *
     * See {@link Ext.enums.Widget} for list of all available xtypes.
     *
     * @since 2.3.0
     */

    /**
     * @cfg {String} tplWriteMode
     * The Ext.(X)Template method to use when updating the content area of the Component.
     * See `{@link Ext.XTemplate#overwrite}` for information on default mode.
     *
     * @since 3.4.0
     */
    tplWriteMode: 'overwrite',

    /**
     * @cfg {String} [baseCls='x-component']
     * The base CSS class to apply to this component's element. This will also be prepended to elements within this
     * component like Panel's body will get a class `x-panel-body`. This means that if you create a subclass of Panel, and
     * you want it to get all the Panels styling for the element and the body, you leave the `baseCls` `x-panel` and use
     * `componentCls` to add specific styling for this component.
     */
    baseCls: Ext.baseCSSPrefix + 'component',

    /**
     * @cfg {String} componentCls
     * CSS Class to be added to a components root level element to give distinction to it via styling.
     */

    /**
     * @cfg {String} [cls='']
     * An optional extra CSS class that will be added to this component's Element. This can be useful
     * for adding customized styles to the component or any of its children using standard CSS rules.
     *
     * @since 1.1.0
     */

    /**
     * @cfg {String} [overCls='']
     * An optional extra CSS class that will be added to this component's Element when the mouse moves over the Element,
     * and removed when the mouse moves out. This can be useful for adding customized 'active' or 'hover' styles to the
     * component or any of its children using standard CSS rules.
     *
     * @since 2.3.0
     */

    /**
     * @cfg {String} [disabledCls='x-item-disabled']
     * CSS class to add when the Component is disabled.
     */
    disabledCls: Ext.baseCSSPrefix + 'item-disabled',

    /**
     * @cfg {String} ui
     * A UI style for a component.
     */
    ui: 'default',

    /**
     * @cfg {String[]} uiCls
     * An array of of `classNames` which are currently applied to this component.
     * @private
     */
    uiCls: [],

    /**
     * @cfg {String/Object} style
     * A custom style specification to be applied to this component's Element. Should be a valid argument to
     * {@link Ext.Element#applyStyles}.
     *
     *     new Ext.panel.Panel({
     *         title: 'Some Title',
     *         renderTo: Ext.getBody(),
     *         width: 400, height: 300,
     *         layout: 'form',
     *         items: [{
     *             xtype: 'textarea',
     *             style: {
     *                 width: '95%',
     *                 marginBottom: '10px'
     *             }
     *         },
     *         new Ext.button.Button({
     *             text: 'Send',
     *             minWidth: '100',
     *             style: {
     *                 marginBottom: '10px'
     *             }
     *         })
     *         ]
     *     });
     *
     * @since 1.1.0
     */

    /**
     * @cfg {Number} width
     * The width of this component in pixels.
     */

    /**
     * @cfg {Number} height
     * The height of this component in pixels.
     */

    /**
     * @cfg {Number/String/Boolean} border
     * Specifies the border size for this component. The border can be a single numeric value to apply to all sides or it can
     * be a CSS style specification for each style, for example: '10 5 3 10' (top, right, bottom, left).
     *
     * For components that have no border by default, setting this won't make the border appear by itself.
     * You also need to specify border color and style:
     *
     *     border: 5,
     *     style: {
     *         borderColor: 'red',
     *         borderStyle: 'solid'
     *     }
     * 
     * To turn off the border, use `border: false`.
     */

    /**
     * @cfg {Number/String} padding
     * Specifies the padding for this component. The padding can be a single numeric value to apply to all sides or it
     * can be a CSS style specification for each style, for example: '10 5 3 10' (top, right, bottom, left).
     */

    /**
     * @cfg {Number/String} margin
     * Specifies the margin for this component. The margin can be a single numeric value to apply to all sides or it can
     * be a CSS style specification for each style, for example: '10 5 3 10' (top, right, bottom, left).
     */

    /**
     * @cfg {Boolean} hidden
     * `true` to hide the component.
     * @since 2.3.0
     */
    hidden: false,

    /**
     * @cfg {Boolean} disabled
     * `true` to disable the component.
     * @since 2.3.0
     */
    disabled: false,

    /**
     * @cfg {Boolean} [draggable=false]
     * Allows the component to be dragged.
     */

    /**
     * @property {Boolean} draggable
     * Indicates whether or not the component can be dragged.
     * @readonly
     */
    draggable: false,

    /**
     * @cfg {Boolean} floating
     * Create the Component as a floating and use absolute positioning.
     *
     * The z-index of floating Components is handled by a ZIndexManager. If you simply render a floating Component into the DOM, it will be managed
     * by the global {@link Ext.WindowManager WindowManager}.
     *
     * If you include a floating Component as a child item of a Container, then upon render, Ext JS will seek an ancestor floating Component to house a new
     * ZIndexManager instance to manage its descendant floaters. If no floating ancestor can be found, the global WindowManager will be used.
     *
     * When a floating Component which has a ZindexManager managing descendant floaters is destroyed, those descendant floaters will also be destroyed.
     */
    floating: false,

    /**
     * @cfg {String} hideMode
     * A String which specifies how this Component's encapsulating DOM element will be hidden. Values may be:
     *
     *   - `'display'` : The Component will be hidden using the `display: none` style.
     *   - `'visibility'` : The Component will be hidden using the `visibility: hidden` style.
     *   - `'offsets'` : The Component will be hidden by absolutely positioning it out of the visible area of the document.
     *     This is useful when a hidden Component must maintain measurable dimensions. Hiding using `display` results in a
     *     Component having zero dimensions.
     *
     * @since 1.1.0
     */
    hideMode: 'display',

    /**
     * @cfg {String} contentEl
     * Specify an existing HTML element, or the `id` of an existing HTML element to use as the content for this component.
     *
     * This config option is used to take an existing HTML element and place it in the layout element of a new component
     * (it simply moves the specified DOM element _after the Component is rendered_ to use as the content.
     *
     * **Notes:**
     *
     * The specified HTML element is appended to the layout element of the component _after any configured
     * {@link #html HTML} has been inserted_, and so the document will not contain this element at the time
     * the {@link #event-render} event is fired.
     *
     * The specified HTML element used will not participate in any **`{@link Ext.container.Container#layout layout}`**
     * scheme that the Component may use. It is just HTML. Layouts operate on child
     * **`{@link Ext.container.Container#cfg-items items}`**.
     *
     * Add either the `x-hidden` or the `x-hide-display` CSS class to prevent a brief flicker of the content before it
     * is rendered to the panel.
     *
     * @since 3.4.0
     */

    /**
     * @cfg {String/Object} [html='']
     * An HTML fragment, or a {@link Ext.DomHelper DomHelper} specification to use as the layout element content.
     * The HTML content is added after the component is rendered, so the document will not contain this HTML at the time
     * the {@link #event-render} event is fired. This content is inserted into the body _before_ any configured {@link #contentEl}
     * is appended.
     *
     * @since 3.4.0
     */

    /**
     * @cfg {Number} minHeight
     * The minimum value in pixels which this Component will set its height to.
     *
     * **Warning:** This will override any size management applied by layout managers.
     */
    /**
     * @cfg {Number} minWidth
     * The minimum value in pixels which this Component will set its width to.
     *
     * **Warning:** This will override any size management applied by layout managers.
     */
    /**
     * @cfg {Number} maxHeight
     * The maximum value in pixels which this Component will set its height to.
     *
     * **Warning:** This will override any size management applied by layout managers.
     */
    /**
     * @cfg {Number} maxWidth
     * The maximum value in pixels which this Component will set its width to.
     *
     * **Warning:** This will override any size management applied by layout managers.
     */

    /**
     * @cfg {Ext.ComponentLoader/Object} loader
     * A configuration object or an instance of a {@link Ext.ComponentLoader} to load remote content
     * for this Component.
     *
     *     Ext.create('Ext.Component', {
     *         loader: {
     *             url: 'content.html',
     *             autoLoad: true
     *         },
     *         renderTo: Ext.getBody()
     *     });
     */

    /**
     * @cfg {Ext.ComponentLoader/Object/String/Boolean} autoLoad
     * An alias for {@link #loader} config which also allows to specify just a string which will be
     * used as the url that's automatically loaded:
     *
     *     Ext.create('Ext.Component', {
     *         autoLoad: 'content.html',
     *         renderTo: Ext.getBody()
     *     });
     *
     * The above is the same as:
     *
     *     Ext.create('Ext.Component', {
     *         loader: {
     *             url: 'content.html',
     *             autoLoad: true
     *         },
     *         renderTo: Ext.getBody()
     *     });
     *
     * Don't use it together with {@link #loader} config.
     *
     * @deprecated 4.1.1 Use {@link #loader} config instead.
     */

    /**
     * @cfg {Boolean} autoShow
     * `true` to automatically show the component upon creation. This config option may only be used for
     * {@link #floating} components or components that use {@link #autoRender}.
     *
     * @since 2.3.0
     */
    autoShow: false,

    /**
     * @cfg {Boolean/String/HTMLElement/Ext.Element} autoRender
     * This config is intended mainly for non-{@link #cfg-floating} Components which may or may not be shown. Instead of using
     * {@link #renderTo} in the configuration, and rendering upon construction, this allows a Component to render itself
     * upon first _{@link Ext.Component#method-show show}_. If {@link #cfg-floating} is `true`, the value of this config is omitted as if it is `true`.
     *
     * Specify as `true` to have this Component render to the document body upon first show.
     *
     * Specify as an element, or the ID of an element to have this Component render to a specific element upon first
     * show.
     */
    autoRender: false,

    // @private
    allowDomMove: true,

    /**
     * @cfg {Ext.AbstractPlugin[]/Ext.AbstractPlugin/Object[]/Object/Ext.enums.Plugin[]/Ext.enums.Plugin} plugins
     * An array of plugins to be added to this component. Can also be just a single plugin instead of array.
     *
     * Plugins provide custom functionality for a component. The only requirement for
     * a valid plugin is that it contain an `init` method that accepts a reference of type Ext.Component. When a component
     * is created, if any plugins are available, the component will call the init method on each plugin, passing a
     * reference to itself. Each plugin can then call methods or respond to events on the component as needed to provide
     * its functionality.
     *
     * Plugins can be added to component by either directly referencing the plugin instance:
     *
     *     plugins: [Ext.create('Ext.grid.plugin.CellEditing', {clicksToEdit: 1})],
     *
     * By using config object with ptype:
     *
     *     plugins: [{ptype: 'cellediting', clicksToEdit: 1}],
     *
     * Or with just a ptype:
     *
     *     plugins: ['cellediting', 'gridviewdragdrop'],
     *
     * See {@link Ext.enums.Plugin} for list of all ptypes.
     *
     * @since 2.3.0
     */

    /**
     * @property {Boolean} rendered
     * Indicates whether or not the component has been rendered.
     * @readonly
     * @since 1.1.0
     */
    rendered: false,

    /**
     * @property {Number} componentLayoutCounter
     * @private
     * The number of component layout calls made on this object.
     */
    componentLayoutCounter: 0,

    /**
     * @cfg {Boolean/Number} [shrinkWrap=2]
     *
     * If this property is a number, it is interpreted as follows:
     *
     *   - 0: Neither width nor height depend on content. This is equivalent to `false`.
     *   - 1: Width depends on content (shrink wraps), but height does not.
     *   - 2: Height depends on content (shrink wraps), but width does not. The default.
     *   - 3: Both width and height depend on content (shrink wrap). This is equivalent to `true`.
     *
     * In CSS terms, shrink-wrap width is analogous to an inline-block element as opposed
     * to a block-level element. Some container layouts always shrink-wrap their children,
     * effectively ignoring this property (e.g., {@link Ext.layout.container.HBox},
     * {@link Ext.layout.container.VBox}, {@link Ext.layout.component.Dock}).
     */
    shrinkWrap: 2,

    /**
     * @cfg {Number} [weight=0]
     * A value to control how Components are laid out in a {@link Ext.layout.container.Border Border} layout or as docked items.
     *
     * In a Border layout, this can control how the regions (not the center) region lay out if the west or east take full height
     * or if the north or south region take full width. Also look at the {@link Ext.layout.container.Border#regionWeights} on the Border layout. An example to show how you can
     * take control of this is:
     *
     *     Ext.create('Ext.container.Viewport', {
     *         layout      : 'border',
     *         defaultType : 'panel',
     *         items       : [
     *             {
     *                 region : 'north',
     *                 title  : 'North',
     *                 height : 100
     *             },
     *             {
     *                 region : 'south',
     *                 title  : 'South',
     *                 height : 100,
     *                 weight : -25
     *             },
     *             {
     *                 region : 'west',
     *                 title  : 'West',
     *                 width  : 200,
     *                 weight : 15
     *             },
     *             {
     *                 region : 'east',
     *                 title  : 'East',
     *                 width  : 200
     *             },
     *             {
     *                 region : 'center',
     *                 title  : 'center'
     *             }
     *         ]
     *     });
     *
     * If docked items, the weight will order how the items are laid out. Here is an example to put a {@link Ext.toolbar.Toolbar} above
     * a {@link Ext.panel.Panel}'s header:
     *
     *     Ext.create('Ext.panel.Panel', {
     *         renderTo    : document.body,
     *         width       : 300,
     *         height      : 300,
     *         title       : 'Panel',
     *         html        : 'Panel Body',
     *         dockedItems : [
     *             {
     *                 xtype : 'toolbar',
     *                 items : [
     *                     {
     *                         text : 'Save'
     *                     }
     *                 ]
     *             },
     *             {
     *                 xtype  : 'toolbar',
     *                 weight : -10,
     *                 items  : [
     *                     {
     *                         text : 'Remove'
     *                     }
     *                 ]
     *             }
     *         ]
     *     });
     */
    weight: 0,

    /**
     * @property {Boolean} maskOnDisable
     * This is an internal flag that you use when creating custom components. By default this is set to `true` which means
     * that every component gets a mask when it's disabled. Components like FieldContainer, FieldSet, Field, Button, Tab
     * override this property to `false` since they want to implement custom disable logic.
     */
    maskOnDisable: true,

    /**
     * @property {Boolean} [_isLayoutRoot=false]
     * Setting this property to `true` causes the {@link #isLayoutRoot} method to return
     * `true` and stop the search for the top-most component for a layout.
     * @protected
     */
    _isLayoutRoot: false,

    /**
     * @property {String} [contentPaddingProperty='padding']
     * The name of the padding property that is used by the layout to manage
     * padding.  See {@link Ext.layout.container.Auto#managePadding managePadding}
     */ 
    contentPaddingProperty: 'padding',
    
    horizontalPosProp: 'left',

    // private
    borderBoxCls: Ext.baseCSSPrefix + 'border-box',
    rootCls: Ext.baseCSSPrefix + 'body',

    /**
     * Creates new Component.
     * @param {Object} config  (optional) Config object.
     */
    constructor : function(config) {
        var me = this,
            i, len, xhooks;

        if (config) {
            Ext.apply(me, config);

            xhooks = me.xhooks;
            if (xhooks) {
                delete me.xhooks;
                Ext.override(me, xhooks);
            }
        } else {
            config = {};
        }

        me.initialConfig = config;

        me.mixins.elementCt.constructor.call(me);

        me.addEvents(
            /**
             * @event beforeactivate
             * Fires before a Component has been visually activated. Returning `false` from an event listener can prevent
             * the activate from occurring.
             *
             * **Note** This event is only fired if this Component is a child of a {@link Ext.container.Container}
             * that uses {@link Ext.layout.container.Card} as it's layout.
             * @param {Ext.Component} this
             */
            'beforeactivate',
            /**
             * @event activate
             * Fires after a Component has been visually activated.
             *
             * **Note** This event is only fired if this Component is a child of a {@link Ext.container.Container}
             * that uses {@link Ext.layout.container.Card} as it's layout or this Component is a floating Component.
             * @param {Ext.Component} this
             */
            'activate',
            /**
             * @event beforedeactivate
             * Fires before a Component has been visually deactivated. Returning `false` from an event listener can
             * prevent the deactivate from occurring.
             *
             * **Note** This event is only fired if this Component is a child of a {@link Ext.container.Container}
             * that uses {@link Ext.layout.container.Card} as it's layout.
             * @param {Ext.Component} this
             */
            'beforedeactivate',
            /**
             * @event deactivate
             * Fires after a Component has been visually deactivated.
             *
             * **Note** This event is only fired if this Component is a child of a {@link Ext.container.Container}
             * that uses {@link Ext.layout.container.Card} as it's layout or this Component is a floating Component.
             * @param {Ext.Component} this
             */
            'deactivate',
            /**
             * @event added
             * Fires after a Component had been added to a Container.
             * @param {Ext.Component} this
             * @param {Ext.container.Container} container Parent Container
             * @param {Number} pos position of Component
             * @since 3.4.0
             */
            'added',
            /**
             * @event disable
             * Fires after the component is disabled.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'disable',
            /**
             * @event enable
             * Fires after the component is enabled.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'enable',
            /**
             * @event beforeshow
             * Fires before the component is shown when calling the {@link Ext.Component#method-show show} method. Return `false` from an event
             * handler to stop the show.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'beforeshow',
            /**
             * @event show
             * Fires after the component is shown when calling the {@link Ext.Component#method-show show} method.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'show',
            /**
             * @event beforehide
             * Fires before the component is hidden when calling the {@link Ext.Component#method-hide hide} method. Return `false` from an event
             * handler to stop the hide.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'beforehide',
            /**
             * @event hide
             * Fires after the component is hidden. Fires after the component is hidden when calling the {@link Ext.Component#method-hide hide}
             * method.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'hide',
            /**
             * @event removed
             * Fires when a component is removed from an Ext.container.Container
             * @param {Ext.Component} this
             * @param {Ext.container.Container} ownerCt Container which holds the component
             * @since 3.4.0
             */
            'removed',
            /**
             * @event beforerender
             * Fires before the component is {@link #rendered}. Return `false` from an event handler to stop the
             * {@link #method-render}.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'beforerender',
            /**
             * @event render
             * Fires after the component markup is {@link #rendered}.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'render',
            /**
             * @event afterrender
             * Fires after the component rendering is finished.
             *
             * The `afterrender` event is fired after this Component has been {@link #rendered}, been postprocessed by any
             * `afterRender` method defined for the Component.
             * @param {Ext.Component} this
             * @since 3.4.0
             */
            'afterrender',
            /**
             * @event boxready
             * Fires *one time* - after the component has been laid out for the first time at its initial size.
             * @param {Ext.Component} this
             * @param {Number} width The initial width.
             * @param {Number} height The initial height.
             */
            'boxready',
            /**
             * @event beforedestroy
             * Fires before the component is {@link #method-destroy}ed. Return `false` from an event handler to stop the
             * {@link #method-destroy}.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'beforedestroy',
            /**
             * @event destroy
             * Fires after the component is {@link #method-destroy}ed.
             * @param {Ext.Component} this
             * @since 1.1.0
             */
            'destroy',
            /**
             * @event resize
             * Fires after the component is resized. Note that this does *not* fire when the component is first laid out at its initial
             * size. To hook that point in the life cycle, use the {@link #boxready} event.
             * @param {Ext.Component} this
             * @param {Number} width The new width that was set.
             * @param {Number} height The new height that was set.
             * @param {Number} oldWidth The previous width.
             * @param {Number} oldHeight The previous height.
             */
            'resize',
            /**
             * @event move
             * Fires after the component is moved.
             * @param {Ext.Component} this
             * @param {Number} x The new x position.
             * @param {Number} y The new y position.
             */
             'move',
            /**
             * @event focus
             * Fires when this Component receives focus.
             * @param {Ext.Component} this
             * @param {Ext.EventObject} The focus event.
             */
            'focus',
            /**
             * @event blur
             * Fires when this Component loses focus.
             * @param {Ext.Component} this
             * @param {Ext.EventObject} The blur event.
             */
            'blur'
        );

        me.getId();

        me.setupProtoEl();

        // initComponent, beforeRender, or event handlers may have set the style or `cls` property since the `protoEl` was set up
        // so we must apply styles and classes here too.
        if (me.cls) {
            me.initialCls = me.cls;
            me.protoEl.addCls(me.cls);
        }
        if (me.style) {
            me.initialStyle = me.style;
            me.protoEl.setStyle(me.style);
        }

        me.renderData = me.renderData || {};
        me.renderSelectors = me.renderSelectors || {};

        if (me.plugins) {
            me.plugins = me.constructPlugins();
        }

        // we need this before we call initComponent
        if (!me.hasListeners) {
            me.hasListeners = new me.HasListeners();
        }

        me.initComponent();

        // ititComponent gets a chance to change the id property before registering
        Ext.ComponentManager.register(me);

        // Don't pass the config so that it is not applied to 'this' again
        me.mixins.observable.constructor.call(me);
        me.mixins.state.constructor.call(me, config);

        // Save state on resize.
        this.addStateEvents('resize');

        // Move this into Observable?
        if (me.plugins) {
            for (i = 0, len = me.plugins.length; i < len; i++) {
                me.plugins[i] = me.initPlugin(me.plugins[i]);
            }
        }

        me.loader = me.getLoader();

        if (me.renderTo) {
            me.render(me.renderTo);
            // EXTJSIV-1935 - should be a way to do afterShow or something, but that
            // won't work. Likewise, rendering hidden and then showing (w/autoShow) has
            // implications to afterRender so we cannot do that.
        }

        // Auto show only works unilaterally on *uncontained* Components.
        // If contained, then it is the Container's responsibility to do the showing at next layout time.
        if (me.autoShow && !me.isContained) {
            me.show();
        }

        //<debug>
        if (Ext.isDefined(me.disabledClass)) {
            if (Ext.isDefined(Ext.global.console)) {
                Ext.global.console.warn('Ext.Component: disabledClass has been deprecated. Please use disabledCls.');
            }
            me.disabledCls = me.disabledClass;
            delete me.disabledClass;
        }
        //</debug>
    },

    initComponent: function () {
        var me = this;

        // If plugins have been added by a subclass's initComponent before calling up to here,
        // The processed flag will not have been set, and we must process them again.
        if (me.plugins && !me.plugins.processed) {
            me.plugins = me.constructPlugins();
        }

        // this will properly (ignore or) constrain the configured width/height to their
        // min/max values for consistency.
        me.setSize(me.width, me.height);
    },

    /**
     * The supplied default state gathering method for the AbstractComponent class.
     *
     * This method returns dimension settings such as `flex`, `anchor`, `width` and `height` along with `collapsed`
     * state.
     *
     * Subclasses which implement more complex state should call the superclass's implementation, and apply their state
     * to the result if this basic state is to be saved.
     *
     * Note that Component state will only be saved if the Component has a {@link #stateId} and there as a StateProvider
     * configured for the document.
     *
     * @return {Object}
     */
    getState: function() {
        var me = this,
            state = null,
            sizeModel = me.getSizeModel();

        if (sizeModel.width.configured) {
            state = me.addPropertyToState(state, 'width');
        }
        if (sizeModel.height.configured) {
            state = me.addPropertyToState(state, 'height');
        }

        return state;
    },

    /**
     * Save a property to the given state object if it is not its default or configured
     * value.
     *
     * @param {Object} state The state object.
     * @param {String} propName The name of the property on this object to save.
     * @param {String} [value] The value of the state property (defaults to `this[propName]`).
     * @return {Boolean} The state object or a new object if state was `null` and the property
     * was saved.
     * @protected
     */
    addPropertyToState: function (state, propName, value) {
        var me = this,
            len = arguments.length;

        // If the property is inherited, it is a default and we don't want to save it to
        // the state, however if we explicitly specify a value, always save it
        if (len == 3 || me.hasOwnProperty(propName)) {
            if (len < 3) {
                value = me[propName];
            }

            // If the property has the same value as was initially configured, again, we
            // don't want to save it.
            if (value !== me.initialConfig[propName]) {
                (state || (state = {}))[propName] = value;
            }
        }

        return state;
    },

    show: Ext.emptyFn,

    animate: function(animObj) {
        var me = this,
            hasToWidth,
            hasToHeight,
            toHeight,
            toWidth,
            to,
            clearWidth,
            clearHeight,
            curWidth, w, curHeight, h, isExpanding,
            wasConstrained,
            wasConstrainedHeader,
            passedCallback,
            oldOverflow;

        animObj = animObj || {};
        to = animObj.to || {};

        if (Ext.fx.Manager.hasFxBlock(me.id)) {
            return me;
        }

        hasToWidth = Ext.isDefined(to.width);
        if (hasToWidth) {
            toWidth = Ext.Number.constrain(to.width, me.minWidth, me.maxWidth);
        }

        hasToHeight = Ext.isDefined(to.height);
        if (hasToHeight) {
            toHeight = Ext.Number.constrain(to.height, me.minHeight, me.maxHeight);
        }

        // Special processing for animating Component dimensions.
        if (!animObj.dynamic && (hasToWidth || hasToHeight)) {
            curWidth = (animObj.from ? animObj.from.width : undefined) || me.getWidth();
            w = curWidth;
            curHeight = (animObj.from ? animObj.from.height : undefined) || me.getHeight();
            h = curHeight;
            isExpanding = false;

            if (hasToHeight && toHeight > curHeight) {
                h = toHeight;
                isExpanding = true;
            }
            if (hasToWidth && toWidth > curWidth) {
                w = toWidth;
                isExpanding = true;
            }

            // During animated sizing, overflow has to be hidden to clip expanded content
            if (hasToHeight || hasToWidth) {
                oldOverflow = me.el.getStyle('overtflow');
                if (oldOverflow !== 'hidden') {
                    me.el.setStyle('overflow', 'hidden');
                }
            }

            // If any dimensions are being increased, we must resize the internal structure
            // of the Component, but then clip it by sizing its encapsulating element back to original dimensions.
            // The animation will then progressively reveal the larger content.
            if (isExpanding) {
                clearWidth = !Ext.isNumber(me.width);
                clearHeight = !Ext.isNumber(me.height);

                // Lay out this component at the new, larger size to get the internals correctly laid out.
                // Then size the encapsulating **Element** back down to size.
                // We will then just animate the element to reveal the correctly laid out content.
                me.setSize(w, h);
                me.el.setSize(curWidth, curHeight);

                if (clearWidth) {
                    delete me.width;
                }
                if (clearHeight) {
                    delete me.height;
                }
            }
            if (hasToWidth) {
                to.width = toWidth;
            }

            if (hasToHeight) {
                to.height = toHeight;
            }
        }

        // No constraining during the animate - the "to" size has already been calculated with respect to all settings.
        // Arrange to reinstate any constraining after the animation has completed
        wasConstrained = me.constrain;
        wasConstrainedHeader = me.constrainHeader;
        if (wasConstrained || wasConstrainedHeader) {
            me.constrain = me.constrainHeader = false;
            passedCallback = animObj.callback;
            animObj.callback = function() {
                me.constrain = wasConstrained;
                me.constrainHeader = wasConstrainedHeader;
                // Call the original callback if any
                if (passedCallback) {
                    passedCallback.call(animObj.scope||me, arguments);
                }
                if (oldOverflow !== 'hidden') {
                    me.el.setStyle('overflow', oldOverflow);
                }
            };
        }
        return me.mixins.animate.animate.apply(me, arguments);
    },
    
    setHiddenState: function(hidden){
        var hierarchyState = this.getHierarchyState();
        
        this.hidden = hidden;
        if (hidden) {
            hierarchyState.hidden = true;
        } else {
            delete hierarchyState.hidden;
        }
    },

    onHide: function() {
        // Only lay out if there is an owning layout which might be affected by the hide
        if (this.ownerLayout) {
            this.updateLayout({ isRoot: false });
        }
    },

    onShow : function() {
        this.updateLayout({ isRoot: false });
    },

    /**
     * @private
     * @param {String/Object} ptype string or config object containing a ptype property.
     *
     * Constructs a plugin according to the passed config object/ptype string.
     *
     * Ensures that the constructed plugin always has a `cmp` reference back to this component.
     * The setting up of this is done in PluginManager. The PluginManager ensures that a reference to this
     * component is passed to the constructor. It also ensures that the plugin's `setCmp` method (if any) is called. 
     */
    constructPlugin: function(plugin) {
        var me = this;
        
        // ptype only, pass as the defultType
        if (typeof plugin == 'string') {
            plugin = Ext.PluginManager.create({}, plugin, me);
        }
        // Object (either config with ptype or an instantiated plugin)
        else {
            plugin = Ext.PluginManager.create(plugin, null, me);
        }
        return plugin;
    },

    /**
     * @private
     * Returns an array of fully constructed plugin instances. This converts any configs into their
     * appropriate instances.
     *
     * It does not mutate the plugins array. It creates a new array.
     */
    constructPlugins: function() {
        var me = this,
            plugins = me.plugins,
            result, i, len;

        if (plugins) {
            result = [];

            // The processed flag indicates that the plugins have been constructed. THis is usually done
            // at construction time, so if at initComponent time, there is a non-zero array of plugins which
            // does NOT have the processed flag, it needs to be processed again.
            result.processed = true;
            if (!Ext.isArray(plugins)) {
                plugins = [ plugins ];
            }
            for (i = 0, len = plugins.length; i < len; i++) {
                // this just returns already-constructed plugin instances...
                result[i] = me.constructPlugin(plugins[i]);
            }
        }

        me.pluginsInitialized = true;
        return result;
    },

    // @private
    initPlugin : function(plugin) {
        plugin.init(this);

        return plugin;
    },

    // @private
    // Adds a plugin. May be called at any time in the component's lifecycle.
    addPlugin: function(plugin) {
        var me = this;

        plugin = me.constructPlugin(plugin);
        if (me.plugins) {
            me.plugins.push(plugin);
        } else {
            me.plugins = [ plugin ];
        }
        if (me.pluginsInitialized) {
            me.initPlugin(plugin);
        }
        return plugin;
    },

    removePlugin: function(plugin) {
        Ext.Array.remove(this.plugins, plugin);
        plugin.destroy();
    },

    /**
     * Retrieves plugin from this component's collection by its `ptype`.
     * @param {String} ptype The Plugin's ptype as specified by the class's `alias` configuration.
     * @return {Ext.AbstractPlugin} plugin instance.
     */
    findPlugin: function(ptype) {
        var i,
            plugins = this.plugins,
            ln = plugins && plugins.length;
        for (i = 0; i < ln; i++) {
            if (plugins[i].ptype === ptype) {
                return plugins[i];
            }
        }
    },

    /**
     * Retrieves a plugin from this component's collection by its `pluginId`.
     * @param {String} pluginId
     * @return {Ext.AbstractPlugin} plugin instance.
     */
    getPlugin: function(pluginId) {
        var i,
            plugins = this.plugins,
            ln = plugins && plugins.length;
        for (i = 0; i < ln; i++) {
            if (plugins[i].pluginId === pluginId) {
                return plugins[i];
            }
        }
    },

    /**
     * Occurs before componentLayout is run. In previous releases, this method could
     * return `false` to prevent its layout but that is not supported in Ext JS 4.1 or
     * higher. This method is simply a notification of the impending layout to give the
     * component a chance to adjust the DOM. Ideally, DOM reads should be avoided at this
     * time to reduce expensive document reflows.
     *
     * @template
     * @protected
     */
    beforeLayout: Ext.emptyFn,

    /**
     * Called by Component#doAutoRender
     *
     * Register a Container configured `floating: true` with this Component's {@link Ext.ZIndexManager ZIndexManager}.
     *
     * Components added in this way will not participate in any layout, but will be rendered
     * upon first show in the way that {@link Ext.window.Window Window}s are.
     */
    registerFloatingItem: function(cmp) {
        var me = this;
        if (!me.floatingDescendants) {
            me.floatingDescendants = new Ext.ZIndexManager(me);
        }
        me.floatingDescendants.register(cmp);
    },

    unregisterFloatingItem: function(cmp) {
        var me = this;
        if (me.floatingDescendants) {
            me.floatingDescendants.unregister(cmp);
        }
    },

    layoutSuspendCount: 0,

    suspendLayouts: function () {
        var me = this;
        if (!me.rendered) {
            return;
        }
        if (++me.layoutSuspendCount == 1) {
            me.suspendLayout = true;
        }
    },

    resumeLayouts: function (flushOptions) {
        var me = this;
        if (!me.rendered) {
            return;
        }
        if (! --me.layoutSuspendCount) {
            me.suspendLayout = false;
            if (flushOptions && !me.isLayoutSuspended()) {
                me.updateLayout(flushOptions);
            }
        }
    },

    setupProtoEl: function() {
        var cls = this.initCls();

        this.protoEl = new Ext.util.ProtoElement({
            cls: cls.join(' ') // in case any of the parts have multiple classes
        });
    },

    initCls: function() {
        var me = this,
            cls = [ me.baseCls, me.getComponentLayout().targetCls ];

        //<deprecated since=0.99>
        if (Ext.isDefined(me.cmpCls)) {
            if (Ext.isDefined(Ext.global.console)) {
                Ext.global.console.warn('Ext.Component: cmpCls has been deprecated. Please use componentCls.');
            }
            me.componentCls = me.cmpCls;
            delete me.cmpCls;
        }
        //</deprecated>

        if (me.componentCls) {
            cls.push(me.componentCls);
        } else {
            me.componentCls = me.baseCls;
        }

        return cls;
    },

    /**
     * Sets the UI for the component. This will remove any existing UIs on the component. It will also loop through any
     * `uiCls` set on the component and rename them so they include the new UI.
     * @param {String} ui The new UI for the component.
     */
    setUI: function(ui) {
        var me = this,
            uiCls = me.uiCls,
            activeUI = me.activeUI,
            classes;

        if (ui === activeUI) {
            // The ui hasn't changed
            return;
        }

        // activeUI will only be set if setUI has been called before. If it hasn't there's no need to remove anything
        if (activeUI) {
            classes = me.removeClsWithUI(uiCls, true);

            if (classes.length) {
                me.removeCls(classes);
            }

            // Remove the UI from the element
            me.removeUIFromElement();
        }
        else {
            // We need uiCls to be empty otherwise our call to addClsWithUI won't do anything
            me.uiCls = [];
        }

        // Set the UI
        me.ui = ui;

        // After the first call to setUI the values ui and activeUI should track each other but initially we need some
        // way to tell whether the ui has really been set.
        me.activeUI = ui;

        // Add the new UI to the element
        me.addUIToElement();

        classes = me.addClsWithUI(uiCls, true);

        if (classes.length) {
            me.addCls(classes);
        }

        // Changing the ui can lead to significant changes to a component's appearance, so the layout needs to be
        // updated. Internally most calls to setUI are pre-render. Buttons are a notable exception as setScale changes
        // the ui and often requires the layout to be updated.
        if (me.rendered) {
            me.updateLayout();
        }
    },

    /**
     * Adds a `cls` to the `uiCls` array, which will also call {@link #addUIClsToElement} and adds to all elements of this
     * component.
     * @param {String/String[]} classes A string or an array of strings to add to the `uiCls`.
     * @param {Object} skip (Boolean) skip `true` to skip adding it to the class and do it later (via the return).
     */
    addClsWithUI: function(classes, skip) {
        var me = this,
            clsArray = [],
            i = 0,
            uiCls = me.uiCls = Ext.Array.clone(me.uiCls),
            activeUI = me.activeUI,
            length,
            cls;

        if (typeof classes === "string") {
            classes = (classes.indexOf(' ') < 0) ? [classes] : Ext.String.splitWords(classes);
        }

        length = classes.length;

        for (; i < length; i++) {
            cls = classes[i];

            if (cls && !me.hasUICls(cls)) {
                uiCls.push(cls);

                // We can skip this bit if there isn't an activeUI because we'll be called again from setUI
                if (activeUI) {
                    clsArray = clsArray.concat(me.addUIClsToElement(cls));
                }
            }
        }

        if (skip !== true && activeUI) {
            me.addCls(clsArray);
        }

        return clsArray;
    },

    /**
     * Removes a `cls` to the `uiCls` array, which will also call {@link #removeUIClsFromElement} and removes it from all
     * elements of this component.
     * @param {String/String[]} cls A string or an array of strings to remove to the `uiCls`.
     */
    removeClsWithUI: function(classes, skip) {
        var me = this,
            clsArray = [],
            i = 0,
            extArray = Ext.Array,
            remove = extArray.remove,
            uiCls = me.uiCls = extArray.clone(me.uiCls),
            activeUI = me.activeUI,
            length, cls;

        if (typeof classes === "string") {
            classes = (classes.indexOf(' ') < 0) ? [classes] : Ext.String.splitWords(classes);
        }

        length = classes.length;

        for (i = 0; i < length; i++) {
            cls = classes[i];

            if (cls && me.hasUICls(cls)) {
                remove(uiCls, cls);

                //If there's no activeUI then there's nothing to remove
                if (activeUI) {
                    clsArray = clsArray.concat(me.removeUIClsFromElement(cls));
                }
            }
        }

        if (skip !== true && activeUI) {
            me.removeCls(clsArray);
        }

        return clsArray;
    },

    /**
     * Checks if there is currently a specified `uiCls`.
     * @param {String} cls The `cls` to check.
     */
    hasUICls: function(cls) {
        var me = this,
            uiCls = me.uiCls || [];

        return Ext.Array.contains(uiCls, cls);
    },

    frameElementsArray: ['tl', 'tc', 'tr', 'ml', 'mc', 'mr', 'bl', 'bc', 'br'],

    /**
     * Method which adds a specified UI + `uiCls` to the components element. Can be overridden to remove the UI from more
     * than just the components element.
     * @param {String} ui The UI to remove from the element.
     */
    addUIClsToElement: function(cls) {
        var me = this,
            baseClsUi = me.baseCls + '-' + me.ui + '-' + cls,
            result = [Ext.baseCSSPrefix + cls, me.baseCls + '-' + cls, baseClsUi],
            frameElementsArray, frameElementsLength, i, el, frameElement;

        if (me.rendered && me.frame && !Ext.supports.CSS3BorderRadius) {
            // define each element of the frame
            frameElementsArray = me.frameElementsArray;
            frameElementsLength = frameElementsArray.length;

            // loop through each of them, and if they are defined add the ui
            for (i = 0; i < frameElementsLength; i++) {
                frameElement = frameElementsArray[i];
                el = me['frame' + frameElement.toUpperCase()];

                if (el) {
                    el.addCls(baseClsUi + '-' + frameElement);
                }
            }
        }

        return result;
    },

    /**
     * Method which removes a specified UI + `uiCls` from the components element. The `cls` which is added to the element
     * will be: `this.baseCls + '-' + ui`.
     * @param {String} ui The UI to add to the element.
     */
    removeUIClsFromElement: function(cls) {
        var me = this,
            baseClsUi = me.baseCls + '-' + me.ui + '-' + cls,
            result = [Ext.baseCSSPrefix + cls, me.baseCls + '-' + cls, baseClsUi],
            frameElementsArray, frameElementsLength, i, el, frameElement;

        if (me.rendered && me.frame && !Ext.supports.CSS3BorderRadius) {
            // define each element of the frame
            frameElementsArray = me.frameElementsArray;
            frameElementsLength = frameElementsArray.length;

            // loop through each of them, and if they are defined add the ui
            for (i = 0; i < frameElementsLength; i++) {
                frameElement = frameElementsArray[i];
                el = me['frame' + frameElement.toUpperCase()];

                if (el) {
                    el.removeCls(baseClsUi + '-' + frameElement);
                }
            }
        }

        return result;
    },

    /**
     * Method which adds a specified UI to the components element.
     * @private
     */
    addUIToElement: function() {
        var me = this,
            baseClsUI = me.baseCls + '-' + me.ui,
            frameElementsArray, frameElementsLength, i, el, frameElement;

        me.addCls(baseClsUI);

        if (me.rendered && me.frame && !Ext.supports.CSS3BorderRadius) {
            // define each element of the frame
            frameElementsArray = me.frameElementsArray;
            frameElementsLength = frameElementsArray.length;

            // loop through each of them, and if they are defined add the ui
            for (i = 0; i < frameElementsLength; i++) {
                frameElement = frameElementsArray[i];
                el = me['frame' + frameElement.toUpperCase()];

                if (el) {
                    el.addCls(baseClsUI + '-' + frameElement);
                }
            }
        }
    },

    /**
     * Method which removes a specified UI from the components element.
     * @private
     */
    removeUIFromElement: function() {
        var me = this,
            baseClsUI = me.baseCls + '-' + me.ui,
            frameElementsArray, frameElementsLength, i, el, frameElement;

        me.removeCls(baseClsUI);

        if (me.rendered && me.frame && !Ext.supports.CSS3BorderRadius) {
            // define each element of the frame
            frameElementsArray = me.frameElementsArray;
            frameElementsLength = frameElementsArray.length;

            for (i = 0; i < frameElementsLength; i++) {
                frameElement = frameElementsArray[i];
                el = me['frame' + frameElement.toUpperCase()];

                if (el) {
                    el.removeCls(baseClsUI + '-' + frameElement);
                }
            }
        }
    },

    /**
     * @private
     */
    getTpl: function(name) {
        return Ext.XTemplate.getTpl(this, name);
    },

    /**
     * Applies padding, margin, border, top, left, height, and width configs to the
     * appropriate elements.
     * @private
     */
    initStyles: function(targetEl) {
        var me = this,
            Element = Ext.Element,
            margin = me.margin,
            border = me.border,
            cls = me.cls,
            style = me.style,
            x = me.x,
            y = me.y,
            width, height;

        me.initPadding(targetEl);

        if (margin != null) {
            targetEl.setStyle('margin', this.unitizeBox((margin === true) ? 5 : margin));
        }

        if (border != null) {
            me.setBorder(border, targetEl);
        }

        // initComponent, beforeRender, or event handlers may have set the style or cls property since the protoEl was set up
        // so we must apply styles and classes here too.
        if (cls && cls != me.initialCls) {
            targetEl.addCls(cls);
            me.cls = me.initialCls = null;
        }
        if (style && style != me.initialStyle) {
            targetEl.setStyle(style);
            me.style = me.initialStyle = null;
        }

        if (x != null) {
            targetEl.setStyle(me.horizontalPosProp, (typeof x == 'number') ? (x + 'px') : x);
        }
        if (y != null) {
            targetEl.setStyle('top', (typeof y == 'number') ? (y + 'px') : y);
        }

        if (!me.ownerCt || me.floating) {
            if (Ext.scopeCss) {
                targetEl.addCls(me.rootCls);
            }
            if (Ext.isBorderBox) {
                targetEl.addCls(me.borderBoxCls);
            }
        }

        // Framed components need their width/height to apply to the frame, which is
        // best handled in layout at present.
        if (!me.getFrameInfo()) {
            width = me.width;
            height = me.height;

            // If we're using the content box model, we also cannot assign numeric initial sizes since we do not know the border widths to subtract
            if (width != null) {
                if (typeof width === 'number') {
                    if (Ext.isBorderBox) {
                        targetEl.setStyle('width', width + 'px');
                    }
                } else {
                    targetEl.setStyle('width', width);
                }
            }
            if (height != null) {
                if (typeof height === 'number') {
                    if (Ext.isBorderBox) {
                        targetEl.setStyle('height', height + 'px');
                    }
                } else {
                    targetEl.setStyle('height', height);
                }
            }
        }
    },

    /**
     * Initializes padding by applying it to the target element, or if the layout manages
     * padding ensures that the padding on the target element is "0".
     * @private
     */
    initPadding: function(targetEl) {
        var me = this,
            padding = me.padding;

        if (padding != null) {
            if (me.layout && me.layout.managePadding && me.contentPaddingProperty === 'padding') {
                // If the container layout manages padding, the layout will apply the 
                // padding to an inner element rather than the target element.  The
                // assumed intent is for the configured padding to override any padding
                // that is applied to the target element via stylesheet rules.  It is
                // therefore necessary to set the target element's padding to "0".
                targetEl.setStyle('padding', 0);
            } else {
                // Convert the padding, margin and border properties from a space seperated string
                // into a proper style string
                targetEl.setStyle('padding', this.unitizeBox((padding === true) ? 5 : padding));
            }
        }
    },
    
    parseBox: function(box) {
        return Ext.dom.Element.parseBox(box);    
    },
    
    unitizeBox: function(box) {
        return Ext.dom.Element.unitizeBox(box);    
    },
    
    /**
     * Sets the margin on the target element.
     * @param {Number/String} margin The margin to set. See the {@link #margin} config.
     */
    setMargin: function(margin, /* private */ preventLayout) {
        var me = this;
        
        if (me.rendered) {
            if (!margin && margin !== 0) {
                margin = '';
            } else {
                if (margin === true) {
                    margin = 5;
                }
                margin = this.unitizeBox(margin);
            }
            me.getTargetEl().setStyle('margin', margin);
            if (!preventLayout) {
                me.updateLayout();
            }
        } else {
            me.margin = margin;
        }
    },

    /**
     * Initialize any events on this component
     * @protected
     */
    initEvents : function() {
        var me = this,
            afterRenderEvents = me.afterRenderEvents,
            afterRenderEvent, el, property, index, len;

        if (afterRenderEvents) {
            for (property in afterRenderEvents) {
                el = me[property];

                if (el && el.on) {
                    afterRenderEvent = afterRenderEvents[property];

                    for (index = 0, len = afterRenderEvent.length ; index < len ; ++index) {
                        me.mon(el, afterRenderEvent[index]);
                     }
                 }
            }
        }

        // This will add focus/blur listeners to the getFocusEl() element if that is naturally focusable.
        // If *not* naturally focusable, then the FocusManager must be enabled to get it to listen for focus so that
        // the FocusManager can track and highlight focus.
        me.addFocusListener();
    },

    /**
     * @private
     * Sets up the focus listener on this Component's {@link #getFocusEl focusEl} if it has one.
     * 
     * Form Components which must implicitly participate in tabbing order usually have a naturally focusable
     * element as their {@link #getFocusEl focusEl}, and it is the DOM event of that receiving focus which drives
     * the Component's `onFocus` handling, and the DOM event of it being blurred which drives the `onBlur` handling.
     *
     * If the {@link #getFocusEl focusEl} is **not** naturally focusable, then the listeners are only added
     * if the {@link Ext.FocusManager FocusManager} is enabled.
     */
    addFocusListener: function() {
        var me = this,
            focusEl = me.getFocusEl(),
            needsTabIndex;

        // All Containers may be focusable, not only "form" type elements, but also
        // Panels, Toolbars, Windows etc.
        // Usually, the <DIV> element they will return as their focusEl will not be able to receive focus
        // However, if the FocusManager is invoked, its non-default navigation handlers (invoked when
        // tabbing/arrowing off of certain Components) may explicitly focus a Panel or Container or FieldSet etc.
        // Add listeners to the focus and blur events on the focus element

        // If this Component returns a focusEl, we might need to add a focus listener to it.
        if (focusEl) {
            // getFocusEl might return a Component if a Container wishes to delegate focus to a descendant.
            // Window can do this via its defaultFocus configuration which can reference a Button.
            if (focusEl.isComponent) {
                return focusEl.addFocusListener();
            }

            // If the focusEl is naturally focusable, then we always need a focus listener to drive the Component's
            // onFocus handling.
            // If *not* naturally focusable, then we only need the focus listener if the FocusManager is enabled.
            needsTabIndex = focusEl.needsTabIndex();
            if (!me.focusListenerAdded && (!needsTabIndex || Ext.FocusManager.enabled)) {
                if (needsTabIndex) {
                    focusEl.dom.tabIndex = -1;
                }
                focusEl.on({
                    focus: me.onFocus,
                    blur: me.onBlur,
                    scope: me
                });
                me.focusListenerAdded = true;
            }
        }
    },

    /**
     * @private
     * Returns the focus holder element associated with this Component. At the Component base class level, this function returns `undefined`.
     *
     * Subclasses which use embedded focusable elements (such as Window, Field and Button) should override this
     * for use by the {@link Ext.Component#method-focus focus} method.
     *
     * Containers which need to participate in the {@link Ext.FocusManager FocusManager}'s navigation and Container focusing scheme also
     * need to return a `focusEl`, although focus is only listened for in this case if the {@link Ext.FocusManager FocusManager} is {@link Ext.FocusManager#method-enable enable}d.
     *
     * @returns {undefined} `undefined` because raw Components cannot by default hold focus.
     */
    getFocusEl: Ext.emptyFn,

    isFocusable: function() {
        var me = this,
            focusEl;
        if ((me.focusable !== false) && (focusEl = me.getFocusEl()) && me.rendered && !me.destroying && !me.isDestroyed && !me.disabled && me.isVisible(true)) {

            // getFocusEl might return a Component if a Container wishes to delegate focus to a descendant.
            // Window can do this via its defaultFocus configuration which can reference a Button.
            // Both Component and Element implement isFocusable, so always ask that.
            return focusEl.isFocusable(true);
        }
    },

    /**
     * Template method to do any pre-focus processing.
     * @protected
     * @param {Ext.EventObject} e The event object
     */
    beforeFocus: Ext.emptyFn,

    // private
    onFocus: function(e) {
        var me = this,
            focusCls = me.focusCls,
            focusEl = me.getFocusEl();

        if (!me.disabled) {
            me.beforeFocus(e);
            if (focusCls && focusEl) {
                focusEl.addCls(me.addClsWithUI(focusCls, true));
            }
            if (!me.hasFocus) {
                me.hasFocus = true;
                me.fireEvent('focus', me, e);
            }
        }
    },

    /**
     * Template method to do any pre-blur processing.
     * @protected
     * @param {Ext.EventObject} e The event object
     */
    beforeBlur : Ext.emptyFn,

    // private
    onBlur : function(e) {
        var me = this,
            focusCls = me.focusCls,
            focusEl = me.getFocusEl();

        if (me.destroying) {
            return;
        }

        me.beforeBlur(e);
        if (focusCls && focusEl) {
            focusEl.removeCls(me.removeClsWithUI(focusCls, true));
        }
        if (me.validateOnBlur) {
            me.validate();
        }
        me.hasFocus = false;
        me.fireEvent('blur', me, e);
        me.postBlur(e);
    },

    /**
     * Template method to do any post-blur processing.
     * @protected
     * @param {Ext.EventObject} e The event object
     */
    postBlur : Ext.emptyFn,

    /**
     * Tests whether this Component matches the selector string.
     * @param {String} selector The selector string to test against.
     * @return {Boolean} `true` if this Component matches the selector.
     */
    is: function(selector) {
        return Ext.ComponentQuery.is(this, selector);
    },

    /**
     * Navigates up the ownership hierarchy searching for an ancestor Container which matches any passed selector or component.
     *
     * *Important.* There is not a universal upwards navigation pointer. There are several upwards relationships
     * such as the {@link Ext.button.Button button} which activates a {@link Ext.button.Button#cfg-menu menu}, or the
     * {@link Ext.menu.Item menu item} which activated a {@link Ext.menu.Item#cfg-menu submenu}, or the
     * {@link Ext.grid.column.Column column header} which activated the column menu.
     *
     * These differences are abstracted away by this method.
     *
     * Example:
     *
     *     var owningTabPanel = grid.up('tabpanel');
     *
     * @param {String/Ext.Component} [selector] The selector component or actual component to test. If not passed the immediate owner/activater is returned.
     * @param {String/Number/Ext.Component} [limit] This may be a selector upon which to stop the upward scan, or a limit of the number of steps, or Component reference to stop on.
     * @return {Ext.container.Container} The matching ancestor Container (or `undefined` if no match was found).
     */
    up: function (selector, limit) {
        var result = this.getRefOwner(),
            limitSelector = typeof limit === 'string',
            limitCount = typeof limit === 'number',
            limitComponent = limit && limit.isComponent,
            steps = 0;

        if (selector) {
            for (; result; result = result.getRefOwner()) {
                steps++;
                if (selector.isComponent) {
                    if (result === selector) {
                        return result;
                    }
                } else {
                    if (Ext.ComponentQuery.is(result, selector)) {
                        return result;
                    }
                }

                // Stop when we hit the limit selector
                if (limitSelector && result.is(limit)) {
                    return;
                }
                if (limitCount && steps === limit) {
                    return;
                }
                if (limitComponent && result === limit) {
                    return;
                }
            }
        }
        return result;
    },

    /**
     * Returns the next sibling of this Component.
     *
     * Optionally selects the next sibling which matches the passed {@link Ext.ComponentQuery ComponentQuery} selector.
     *
     * May also be referred to as **`next()`**
     *
     * Note that this is limited to siblings, and if no siblings of the item match, `null` is returned. Contrast with
     * {@link #nextNode}
     * @param {String} [selector] A {@link Ext.ComponentQuery ComponentQuery} selector to filter the following items.
     * @return {Ext.Component} The next sibling (or the next sibling which matches the selector).
     * Returns `null` if there is no matching sibling.
     */
    nextSibling: function(selector) {
        var o = this.ownerCt, it, last, idx, c;
        if (o) {
            it = o.items;
            idx = it.indexOf(this) + 1;
            if (idx) {
                if (selector) {
                    for (last = it.getCount(); idx < last; idx++) {
                        if ((c = it.getAt(idx)).is(selector)) {
                            return c;
                        }
                    }
                } else {
                    if (idx < it.getCount()) {
                        return it.getAt(idx);
                    }
                }
            }
        }
        return null;
    },

    /**
     * Returns the previous sibling of this Component.
     *
     * Optionally selects the previous sibling which matches the passed {@link Ext.ComponentQuery ComponentQuery}
     * selector.
     *
     * May also be referred to as **`prev()`**
     *
     * Note that this is limited to siblings, and if no siblings of the item match, `null` is returned. Contrast with
     * {@link #previousNode}
     * @param {String} [selector] A {@link Ext.ComponentQuery ComponentQuery} selector to filter the preceding items.
     * @return {Ext.Component} The previous sibling (or the previous sibling which matches the selector).
     * Returns `null` if there is no matching sibling.
     */
    previousSibling: function(selector) {
        var o = this.ownerCt, it, idx, c;
        if (o) {
            it = o.items;
            idx = it.indexOf(this);
            if (idx != -1) {
                if (selector) {
                    for (--idx; idx >= 0; idx--) {
                        if ((c = it.getAt(idx)).is(selector)) {
                            return c;
                        }
                    }
                } else {
                    if (idx) {
                        return it.getAt(--idx);
                    }
                }
            }
        }
        return null;
    },

    /**
     * Returns the previous node in the Component tree in tree traversal order.
     *
     * Note that this is not limited to siblings, and if invoked upon a node with no matching siblings, will walk the
     * tree in reverse order to attempt to find a match. Contrast with {@link #previousSibling}.
     * @param {String} [selector] A {@link Ext.ComponentQuery ComponentQuery} selector to filter the preceding nodes.
     * @return {Ext.Component} The previous node (or the previous node which matches the selector).
     * Returns `null` if there is no matching node.
     */
    previousNode: function(selector, /* private */ includeSelf) {
        var node = this,
            ownerCt = node.ownerCt,
            result,
            it, i, sib;

        // If asked to include self, test me
        if (includeSelf && node.is(selector)) {
            return node;
        }

        if (ownerCt) {
            for (it = ownerCt.items.items, i = Ext.Array.indexOf(it, node) - 1; i > -1; i--) {
                sib = it[i];
                if (sib.query) {
                    result = sib.query(selector);
                    result = result[result.length - 1];
                    if (result) {
                        return result;
                    }
                }
                if (sib.is(selector)) {
                    return sib;
                }
            }
            return ownerCt.previousNode(selector, true);
        }
        return null;
    },

    /**
     * Returns the next node in the Component tree in tree traversal order.
     *
     * Note that this is not limited to siblings, and if invoked upon a node with no matching siblings, will walk the
     * tree to attempt to find a match. Contrast with {@link #nextSibling}.
     * @param {String} [selector] A {@link Ext.ComponentQuery ComponentQuery} selector to filter the following nodes.
     * @return {Ext.Component} The next node (or the next node which matches the selector).
     * Returns `null` if there is no matching node.
     */
    nextNode: function(selector, /* private */ includeSelf) {
        var node = this,
            ownerCt = node.ownerCt,
            result,
            it, len, i, sib;

        // If asked to include self, test me
        if (includeSelf && node.is(selector)) {
            return node;
        }

        if (ownerCt) {
            for (it = ownerCt.items.items, i = Ext.Array.indexOf(it, node) + 1, len = it.length; i < len; i++) {
                sib = it[i];
                if (sib.is(selector)) {
                    return sib;
                }
                if (sib.down) {
                    result = sib.down(selector);
                    if (result) {
                        return result;
                    }
                }
            }
            return ownerCt.nextNode(selector);
        }
        return null;
    },

    /**
     * Retrieves the `id` of this component. Will auto-generate an `id` if one has not already been set.
     * @return {String}
     */
    getId : function() {
        return this.id || (this.id = 'ext-comp-' + (this.getAutoId()));
    },

    /**
     * Returns the value of {@link #itemId} assigned to this component, or when that
     * is not set, returns the value of {@link #id}.
     * @return {String}
     */
    getItemId : function() {
        return this.itemId || this.id;
    },

    /**
     * Retrieves the top level element representing this component.
     * @return {Ext.dom.Element}
     * @since 1.1.0
     */
    getEl : function() {
        return this.el;
    },

    /**
     * This is used to determine where to insert the 'html', 'contentEl' and 'items' in this component.
     * @private
     */
    getTargetEl: function() {
        return this.frameBody || this.el;
    },
    
    /**
     * Get an el for overflowing, defaults to the target el
     * @private
     */
    getOverflowEl: function(){
        return this.getTargetEl();
    },

    /**
     * @private
     * Returns the CSS style object which will set the Component's scroll styles. This must be applied
     * to the {@link #getTargetEl target element}.
     */
    getOverflowStyle: function() {
        var me = this,
            result = null,
            auto = me.autoScroll,
            ox, oy,
            overflowStyle;

        // Note to maintainer. To save on waves of testing, setting and defaulting, the code below
        // rolls assignent statements into conditional test value expressions and property object initializers.
        // This avoids sprawling code. Maintain with care.
        if (typeof auto === 'boolean') {
            result = {
                overflow: overflowStyle = (auto ? 'auto' : '')
            };
            me.scrollFlags = {
                overflowX: overflowStyle,
                overflowY: overflowStyle,
                x: auto,
                y: auto,
                both: auto
            };
        } else {
            ox = me.overflowX;
            oy = me.overflowY;
            if (ox !== undefined || oy !== undefined) {
                if (ox && ox === true) {
                    ox = 'auto';
                }
                
                if (oy && oy === true) {
                    oy = 'auto';
                }
                result = {
                    'overflowX':  ox = ox || '',
                    'overflowY':  oy = oy || ''
                };

                /**
                * @member Ext.Component
                * @property {Object} scrollFlags
                * An object property which provides unified information as to which dimensions are scrollable based upon
                * the {@link #autoScroll}, {@link #overflowX} and {@link #overflowY} settings (And for *views* of trees and grids, the owning panel's {@link Ext.panel.Table#scroll scroll} setting).
                * 
                * Note that if you set overflow styles using the {@link #style} config or {@link Ext.panel.Panel#bodyStyle bodyStyle} config, this object does not include that information;
                * it is best to use {@link #autoScroll}, {@link #overflowX} and {@link #overflowY} if you need to access these flags.
                * 
                * This object has the following properties:
                * @property {Boolean} scrollFlags.x `true` if this Component is scrollable horizontally - style setting may be `'auto'` or `'scroll'`.
                * @property {Boolean} scrollFlags.y `true` if this Component is scrollable vertically - style setting may be `'auto'` or `'scroll'`.
                * @property {Boolean} scrollFlags.both `true` if this Component is scrollable both horizontally and vertically.
                * @property {String} scrollFlags.overflowX The `overflow-x` style setting, `'auto'` or `'scroll'` or `''`.
                * @property {String} scrollFlags.overflowY The `overflow-y` style setting, `'auto'` or `'scroll'` or `''`.
                * @readonly
                */
                me.scrollFlags = {
                    overflowX: ox,
                    overflowY: oy,
                    x: ox = (ox === 'auto' || ox === 'scroll'),
                    y: oy = (oy === 'auto' || oy === 'scroll'),
                    both: ox && oy
                };
            } else {
                me.scrollFlags = {
                    overflowX: '',
                    overflowY: '',
                    x: false,
                    y: false,
                    both: false
                };
            }
        }

        // The scrollable container element must be non-statically positioned or IE6/7 will make
        // positioned children stay in place rather than scrolling with the rest of the content
        if (result && Ext.isIE7m) {
            result.position = 'relative';
        }

        return result;
    },

    /**
     * Tests whether or not this Component is of a specific xtype. This can test whether this Component is descended
     * from the xtype (default) or whether it is directly of the xtype specified (`shallow = true`).
     *
     * **If using your own subclasses, be aware that a Component must register its own xtype to participate in
     * determination of inherited xtypes.**
     *
     * For a list of all available xtypes, see the {@link Ext.Component} header.
     *
     * Example usage:
     *
     *     @example
     *     var t = new Ext.form.field.Text();
     *     var isText = t.isXType('textfield');        // true
     *     var isBoxSubclass = t.isXType('field');       // true, descended from Ext.form.field.Base
     *     var isBoxInstance = t.isXType('field', true); // false, not a direct Ext.form.field.Base instance
     *
     * @param {String} xtype The xtype to check for this Component
     * @param {Boolean} [shallow=false] `true` to check whether this Component is directly of the specified xtype, `false` to
     * check whether this Component is descended from the xtype.
     * @return {Boolean} `true` if this component descends from the specified xtype, `false` otherwise.
     *
     * @since 2.3.0
     */
    isXType: function(xtype, shallow) {
        if (shallow) {
            return this.xtype === xtype;
        }
        else {
            return this.xtypesMap[xtype];
        }
    },

    /**
     * Returns this Component's xtype hierarchy as a slash-delimited string. For a list of all available xtypes, see the
     * {@link Ext.Component} header.
     *
     * **If using your own subclasses, be aware that a Component must register its own xtype to participate in
     * determination of inherited xtypes.**
     *
     * Example usage:
     *
     *     @example
     *     var t = new Ext.form.field.Text();
     *     alert(t.getXTypes());  // alerts 'component/field/textfield'
     *
     * @return {String} The xtype hierarchy string
     *
     * @since 2.3.0
     */
    getXTypes: function() {
        var self = this.self,
            xtypes, parentPrototype, parentXtypes;

        if (!self.xtypes) {
            xtypes = [];
            parentPrototype = this;

            while (parentPrototype) {
                parentXtypes = parentPrototype.xtypes;

                if (parentXtypes !== undefined) {
                    xtypes.unshift.apply(xtypes, parentXtypes);
                }

                parentPrototype = parentPrototype.superclass;
            }

            self.xtypeChain = xtypes;
            self.xtypes = xtypes.join('/');
        }

        return self.xtypes;
    },

    /**
     * Update the content area of a component.
     * @param {String/Object} htmlOrData If this component has been configured with a template via the tpl config then
     * it will use this argument as data to populate the template. If this component was not configured with a template,
     * the components content area will be updated via Ext.Element update.
     * @param {Boolean} [loadScripts=false] Only legitimate when using the `html` configuration.
     * @param {Function} [callback] Only legitimate when using the `html` configuration. Callback to execute when
     * scripts have finished loading.
     *
     * @since 3.4.0
     */
    update : function(htmlOrData, loadScripts, cb) {
        var me = this,
            isData = (me.tpl && !Ext.isString(htmlOrData)),
            el;

        if (isData) {
            me.data = htmlOrData;
        } else {
            me.html = Ext.isObject(htmlOrData) ? Ext.DomHelper.markup(htmlOrData) : htmlOrData;
        }

        if (me.rendered) {
            el = me.isContainer ? me.layout.getRenderTarget() : me.getTargetEl();
            if (isData) {
                me.tpl[me.tplWriteMode](el, htmlOrData || {});
            } else {
                el.update(me.html, loadScripts, cb);
            }
            me.updateLayout();
        }

    },

    /**
     * Convenience function to hide or show this component by Boolean.
     * @param {Boolean} visible `true` to show, `false` to hide.
     * @return {Ext.Component} this
     * @since 1.1.0
     */
    setVisible : function(visible) {
        return this[visible ? 'show': 'hide']();
    },

    /**
     * Returns `true` if this component is visible.
     *
     * @param {Boolean} [deep=false] Pass `true` to interrogate the visibility status of all parent Containers to
     * determine whether this Component is truly visible to the user.
     *
     * Generally, to determine whether a Component is hidden, the no argument form is needed. For example when creating
     * dynamically laid out UIs in a hidden Container before showing them.
     *
     * @return {Boolean} `true` if this component is visible, `false` otherwise.
     *
     * @since 1.1.0
     */
    isVisible: function(deep) {
        var me = this,
            hidden;

        if (me.hidden || !me.rendered || me.isDestroyed) {
            hidden = true;
        } else if (deep) {
            hidden = me.isHierarchicallyHidden();
        }

        return !hidden;
    },

    isHierarchicallyHidden: function() {
        var child = this,
            hidden = false,
            parent, parentHierarchyState;

        // It is possible for some components to be immune to collapse meaning the immune
        // component remains visible when its direct parent is collapsed, e.g. panel header.
        // Because of this, we must walk up the component hierarchy to determine the true
        // visible state of the component.
        for (; (parent = child.ownerCt || child.floatParent); child = parent) {
            parentHierarchyState = parent.getHierarchyState();
            if (parentHierarchyState.hidden) {
                hidden = true;
                break;
            }
            if (child.getHierarchyState().collapseImmune) {
                // The child or one of its ancestors is immune to collapse.
                if (parent.collapsed && !child.collapseImmune) {
                    // If the child's direct parent is collapsed, and the child
                    // itself does not have collapse immunity we know that
                    // the child is not visible.
                    hidden = true;
                    break;
                }
            } else {
                // We have ascended the tree to a point where collapse immunity
                // is not in play.  This means if any anscestor above this point
                // is collapsed, then the component is not visible.
                hidden = !!parentHierarchyState.collapsed;
                break;
            }
        }

        return hidden;
    },

    /**
     * Invoked when this component has first achieved size. Occurs after the
     * {@link #componentLayout} has completed its initial run.
     *
     * @param {Number} width The width of this component
     * @param {Number} height The height of this component
     * 
     * @template
     * @protected
     */
    onBoxReady: function(width, height) {
        var me = this;

        if (me.disableOnBoxReady) {
            me.onDisable();
        } else if (me.enableOnBoxReady) {
            me.onEnable();
        }
        if (me.resizable) {
            me.initResizable(me.resizable);
        }

        // Draggability must be initialized after resizability
        // Because if we have to be wrapped, the resizer wrapper must be dragged as a pseudo-Component
        if (me.draggable) {
            me.initDraggable();
        }
        
        if (me.hasListeners.boxready) {
            me.fireEvent('boxready', me, width, height);
        }
    },

    /**
     * Enable the component
     * @param {Boolean} [silent=false] Passing `true` will suppress the `enable` event from being fired.
     * @since 1.1.0
     */
    enable: function(silent) {
        var me = this;

        delete me.disableOnBoxReady;
        me.removeCls(me.disabledCls);
        if (me.rendered) {
            me.onEnable();
        } else {
            me.enableOnBoxReady = true;
        }

        me.disabled = false;
        delete me.resetDisable;

        if (silent !== true) {
            me.fireEvent('enable', me);
        }

        return me;
    },

    /**
     * Disable the component.
     * @param {Boolean} [silent=false] Passing `true` will suppress the `disable` event from being fired.
     * @since 1.1.0
     */
    disable: function(silent) {
        var me = this;

        delete me.enableOnBoxReady;
        me.addCls(me.disabledCls);
        if (me.rendered) {
            me.onDisable();
        } else {
            me.disableOnBoxReady = true;
        }

        me.disabled = true;

        if (silent !== true) {
            delete me.resetDisable;
            me.fireEvent('disable', me);
        }

        return me;
    },

    /**
     * Allows addition of behavior to the enable operation.
     * After calling the superclass's `onEnable`, the Component will be enabled.
     *
     * @template
     * @protected
     */
    onEnable: function() {
        if (this.maskOnDisable) {
            this.el.dom.disabled = false;
            this.unmask();
        }
    },

    /**
     * Allows addition of behavior to the disable operation.
     * After calling the superclass's `onDisable`, the Component will be disabled.
     *
     * @template
     * @protected
     */
    onDisable : function() {
        var me = this,
            focusCls = me.focusCls,
            focusEl = me.getFocusEl();
            
        if (focusCls && focusEl) {
            focusEl.removeCls(me.removeClsWithUI(focusCls, true));
        }
        
        if (me.maskOnDisable) {
            me.el.dom.disabled = true;
            me.mask();
        }
    },

    mask: function (msg, msgCls, elHeight) {
        var box = this.lastBox,
            target = this.getMaskTarget();

        // Pass it the height of our element if we know it.
        if (box) {
            elHeight = box.height;
        }
        target.mask(msg, msgCls, elHeight);
    },

    unmask: function() {
        this.getMaskTarget().unmask();
    },

    getMaskTarget: function(){
        return this.el;
    },

    /**
     * Method to determine whether this Component is currently disabled.
     * @return {Boolean} the disabled state of this Component.
     */
    isDisabled : function() {
        return this.disabled;
    },

    /**
     * Enable or disable the component.
     * @param {Boolean} disabled `true` to disable.
     */
    setDisabled : function(disabled) {
        return this[disabled ? 'disable': 'enable']();
    },

    /**
     * Method to determine whether this Component is currently set to hidden.
     * @return {Boolean} the hidden state of this Component.
     */
    isHidden : function() {
        return this.hidden;
    },

    /**
     * Adds a CSS class to the top level element representing this component.
     * @param {String/String[]} cls The CSS class name to add.
     * @return {Ext.Component} Returns the Component to allow method chaining.
     */
    addCls : function(cls) {
        var me = this,
            el = me.rendered ? me.el : me.protoEl;

        el.addCls.apply(el, arguments);
        return me;
    },

    /**
     * @inheritdoc Ext.AbstractComponent#addCls
     * @deprecated 4.1 Use {@link #addCls} instead.
     * @since 2.3.0
     */
    addClass : function() {
        return this.addCls.apply(this, arguments);
    },

    /**
     * Checks if the specified CSS class exists on this element's DOM node.
     * @param {String} className The CSS class to check for.
     * @return {Boolean} `true` if the class exists, else `false`.
     * @method
     */
    hasCls: function (cls) {
        var me = this,
            el = me.rendered ? me.el : me.protoEl;

        return el.hasCls.apply(el, arguments);
    },

    /**
     * Removes a CSS class from the top level element representing this component.
     * @param {String/String[]} cls The CSS class name to remove.
     * @returns {Ext.Component} Returns the Component to allow method chaining.
     */
    removeCls : function(cls) {
        var me = this,
            el = me.rendered ? me.el : me.protoEl;

        el.removeCls.apply(el, arguments);
        return me;
    },

    //<debug>
    // @since 2.3.0
    removeClass : function() {
        if (Ext.isDefined(Ext.global.console)) {
            Ext.global.console.warn('Ext.Component: removeClass has been deprecated. Please use removeCls.');
        }
        return this.removeCls.apply(this, arguments);
    },
    //</debug>

    addOverCls: function() {
        var me = this;
        if (!me.disabled) {
            me.el.addCls(me.overCls);
        }
    },

    removeOverCls: function() {
        this.el.removeCls(this.overCls);
    },

    addListener : function(element, listeners, scope, options) {
        var me = this,
            fn,
            option;

        if (Ext.isString(element) && (Ext.isObject(listeners) || options && options.element)) {
            if (options.element) {
                fn = listeners;

                listeners = {};
                listeners[element] = fn;
                element = options.element;
                if (scope) {
                    listeners.scope = scope;
                }

                for (option in options) {
                    if (options.hasOwnProperty(option)) {
                        if (me.eventOptionsRe.test(option)) {
                            listeners[option] = options[option];
                        }
                    }
                }
            }

            // At this point we have a variable called element,
            // and a listeners object that can be passed to on
            if (me[element] && me[element].on) {
                me.mon(me[element], listeners);
            } else {
                me.afterRenderEvents = me.afterRenderEvents || {};
                if (!me.afterRenderEvents[element]) {
                    me.afterRenderEvents[element] = [];
                }
                me.afterRenderEvents[element].push(listeners);
            }
            return;
        }

        return me.mixins.observable.addListener.apply(me, arguments);
    },

    // inherit docs
    removeManagedListenerItem: function(isClear, managedListener, item, ename, fn, scope){
        var me = this,
            element = managedListener.options ? managedListener.options.element : null;

        if (element) {
            element = me[element];
            if (element && element.un) {
                if (isClear || (managedListener.item === item && managedListener.ename === ename && (!fn || managedListener.fn === fn) && (!scope || managedListener.scope === scope))) {
                    element.un(managedListener.ename, managedListener.fn, managedListener.scope);
                    if (!isClear) {
                        Ext.Array.remove(me.managedListeners, managedListener);
                    }
                }
            }
        } else {
            return me.mixins.observable.removeManagedListenerItem.apply(me, arguments);
        }
    },

    /**
     * Provides the link for Observable's `fireEvent` method to bubble up the ownership hierarchy.
     * @return {Ext.container.Container} the Container which owns this Component.
     * @since 3.4.0
     */
    getBubbleTarget : function() {
        return this.ownerCt;
    },

    /**
     * Method to determine whether this Component is floating.
     * @return {Boolean} the floating state of this component.
     */
    isFloating : function() {
        return this.floating;
    },

    /**
     * Method to determine whether this Component is draggable.
     * @return {Boolean} the draggable state of this component.
     */
    isDraggable : function() {
        return !!this.draggable;
    },

    /**
     * Method to determine whether this Component is droppable.
     * @return {Boolean} the droppable state of this component.
     */
    isDroppable : function() {
        return !!this.droppable;
    },

    /**
     * Method to manage awareness of when components are added to their
     * respective Container, firing an #added event. References are
     * established at add time rather than at render time.
     *
     * Allows addition of behavior when a Component is added to a
     * Container. At this stage, the Component is in the parent
     * Container's collection of child items. After calling the
     * superclass's `onAdded`, the `ownerCt` reference will be present,
     * and if configured with a ref, the `refOwner` will be set.
     *
     * @param {Ext.container.Container} container Container which holds the component.
     * @param {Number} pos Position at which the component was added.
     *
     * @template
     * @protected
     * @since 3.4.0
     */
    onAdded : function(container, pos) {
        var me = this;

        me.ownerCt = container;

        if (me.hierarchyState) {
            // if component has a hierarchyState at this point we set an invalid flag in the
            // hierarchy state so that descendants of this component know to re-initialize
            // their hierarchyState the next time it is requested (see getHierarchyState())
            me.hierarchyState.invalid = true;
            // We can now delete the old hierarchyState since it is invalid.  IMPORTANT:
            // the descendants are still linked to the old hierarchy state via the
            // prototype chain, and their heirarchyState property will be synced up 
            // the next time their getHierarchyState() method is called.  For this reason
            // hierarchyState should always be accessed using getHierarchyState()
            delete me.hierarchyState;
        }

        if (me.hasListeners.added) {
            me.fireEvent('added', me, container, pos);
        }
    },

    /**
     * Method to manage awareness of when components are removed from their
     * respective Container, firing a #removed event. References are properly
     * cleaned up after removing a component from its owning container.
     *
     * Allows addition of behavior when a Component is removed from
     * its parent Container. At this stage, the Component has been
     * removed from its parent Container's collection of child items,
     * but has not been destroyed (It will be destroyed if the parent
     * Container's `autoDestroy` is `true`, or if the remove call was
     * passed a truthy second parameter). After calling the
     * superclass's `onRemoved`, the `ownerCt` and the `refOwner` will not
     * be present.
     * @param {Boolean} destroying Will be passed as `true` if the Container performing the remove operation will delete this
     * Component upon remove.
     *
     * @template
     * @protected
     * @since 3.4.0
     */
    onRemoved : function(destroying) {
        var me = this;
        if (me.hasListeners.removed) {
            me.fireEvent('removed', me, me.ownerCt);
        }
        delete me.ownerCt;
        delete me.ownerLayout;
    },

    /**
     * Invoked before the Component is destroyed.
     *
     * @method
     * @template
     * @protected
     */
    beforeDestroy : Ext.emptyFn,

    /**
     * Allows addition of behavior to the resize operation.
     *
     * Called when Ext.resizer.Resizer#drag event is fired.
     *
     * @method
     * @template
     * @protected
     */
    onResize: function(width, height, oldWidth, oldHeight) {
        var me = this;

        // constrain is a config on Floating
        if (me.floating && me.constrain) {
            me.doConstrain();
        }
        if (me.hasListeners.resize) {
            me.fireEvent('resize', me, width, height, oldWidth, oldHeight);
        }
    },

    /**
     * Sets the width and height of this Component. This method fires the {@link #resize} event. This method can accept
     * either width and height as separate arguments, or you can pass a size object like `{width:10, height:20}`.
     *
     * @param {Number/String/Object} width The new width to set. This may be one of:
     *
     *   - A Number specifying the new width in the {@link #getEl Element}'s {@link Ext.Element#defaultUnit}s (by default, pixels).
     *   - A String used to set the CSS width style.
     *   - A size object in the format `{width: widthValue, height: heightValue}`.
     *   - `undefined` to leave the width unchanged.
     *
     * @param {Number/String} height The new height to set (not required if a size object is passed as the first arg).
     * This may be one of:
     *
     *   - A Number specifying the new height in the {@link #getEl Element}'s {@link Ext.Element#defaultUnit}s (by default, pixels).
     *   - A String used to set the CSS height style. Animation may **not** be used.
     *   - `undefined` to leave the height unchanged.
     *
     * @return {Ext.Component} this
     */
    setSize : function(width, height) {
        var me = this;

        // support for standard size objects
        if (width && typeof width == 'object') {
            height = width.height;
            width  = width.width;
        }

        // Constrain within configured maxima
        if (typeof width == 'number') {
            me.width = Ext.Number.constrain(width, me.minWidth, me.maxWidth);
        } else if (width === null) {
            delete me.width;
        }
        
        if (typeof height == 'number') {
            me.height = Ext.Number.constrain(height, me.minHeight, me.maxHeight);
        } else if (height === null) {
            delete me.height;
        }

        // If not rendered, all we need to is set the properties.
        // The initial layout will set the size
        if (me.rendered && me.isVisible()) {

            // If we are changing size, then we are not the root.
            me.updateLayout({
                isRoot: false
            });
        }

        return me;
    },

    /**
     * Determines whether this Component is the root of a layout. This returns `true` if
     * this component can run its layout without assistance from or impact on its owner.
     * If this component cannot run its layout given these restrictions, `false` is returned
     * and its owner will be considered as the next candidate for the layout root.
     *
     * Setting the {@link #_isLayoutRoot} property to `true` causes this method to always
     * return `true`. This may be useful when updating a layout of a Container which shrink
     * wraps content, and you know that it will not change size, and so can safely be the
     * topmost participant in the layout run.
     * @protected
     */
    isLayoutRoot: function() {
        var me = this,
            ownerLayout = me.ownerLayout;

        // Return true if we have been explicitly flagged as the layout root, or if we are floating.
        // Sometimes floating Components get an ownerCt ref injected into them which is *not* a true ownerCt, merely
        // an upward link for reference purposes. For example a grid column menu is linked to the
        // owning header via an ownerCt reference.
        if (!ownerLayout || me._isLayoutRoot || me.floating) {
            return true;
        }

        return ownerLayout.isItemLayoutRoot(me);
    },

    /**
     * Returns `true` if layout is suspended for this component. This can come from direct
     * suspension of this component's layout activity ({@link Ext.Container#suspendLayout}) or if one
     * of this component's containers is suspended.
     *
     * @return {Boolean} `true` layout of this component is suspended.
     */
    isLayoutSuspended: function () {
        var comp = this,
            ownerLayout;

        while (comp) {
            if (comp.layoutSuspendCount || comp.suspendLayout) {
                return true;
            }

            ownerLayout = comp.ownerLayout;
            if (!ownerLayout) {
                break;
            }

            // TODO - what about suspending a Layout instance?

            // this works better than ownerCt since ownerLayout means "is managed by" in
            // the proper sense... some floating components have ownerCt but won't have an
            // ownerLayout
            comp = ownerLayout.owner;
        }

        return false;
    },

    /**
     * Updates this component's layout. If this update affects this components {@link #ownerCt},
     * that component's `updateLayout` method will be called to perform the layout instead.
     * Otherwise, just this component (and its child items) will layout.
     *
     * @param {Object} [options] An object with layout options.
     * @param {Boolean} options.defer `true` if this layout should be deferred.
     * @param {Boolean} options.isRoot `true` if this layout should be the root of the layout.
     */
    updateLayout: function (options) {
        var me = this,
            defer,
            lastBox = me.lastBox,
            isRoot = options && options.isRoot;

        if (lastBox) {
            // remember that this component's last layout result is invalid and must be
            // recalculated
            lastBox.invalid = true;
        }

        if (!me.rendered || me.layoutSuspendCount || me.suspendLayout) {
            return;
        }

        if (me.hidden) {
            Ext.AbstractComponent.cancelLayout(me);
        } else if (typeof isRoot != 'boolean') {
            isRoot = me.isLayoutRoot();
        }

        // if we aren't the root, see if our ownerLayout will handle it...
        if (isRoot || !me.ownerLayout || !me.ownerLayout.onContentChange(me)) {
            // either we are the root or our ownerLayout doesn't care
            if (!me.isLayoutSuspended()) {
                // we aren't suspended (knew that), but neither is any of our ownerCt's...
                defer = (options && options.hasOwnProperty('defer')) ? options.defer : me.deferLayouts;
                Ext.AbstractComponent.updateLayout(me, defer);
            }
        }
    },

    /**
     * Returns an object that describes how this component's width and height are managed.
     * All of these objects are shared and should not be modified.
     *
     * @return {Object} The size model for this component.
     * @return {Ext.layout.SizeModel} return.width The {@link Ext.layout.SizeModel size model}
     * for the width.
     * @return {Ext.layout.SizeModel} return.height The {@link Ext.layout.SizeModel size model}
     * for the height.
     */
    getSizeModel: function (ownerCtSizeModel) {
        var me = this,
            models = Ext.layout.SizeModel,
            ownerContext = me.componentLayout.ownerContext,
            width = me.width,
            height = me.height,
            typeofWidth, typeofHeight,
            hasPixelWidth, hasPixelHeight,
            heightModel, ownerLayout, policy, shrinkWrap, topLevel, widthModel;

        if (ownerContext) {
            // If we are in the middle of a running layout, always report the current,
            // dynamic size model rather than recompute it. This is not (only) a time
            // saving thing, but a correctness thing since we cannot get the right answer
            // otherwise.
            widthModel = ownerContext.widthModel;
            heightModel = ownerContext.heightModel;
        }

        if (!widthModel || !heightModel) {
            hasPixelWidth = ((typeofWidth = typeof width) == 'number');
            hasPixelHeight = ((typeofHeight = typeof height) == 'number');
            topLevel = me.floating || !(ownerLayout = me.ownerLayout);

            // Floating or no owner layout, e.g. rendered using renderTo
            if (topLevel) {
                policy = Ext.layout.Layout.prototype.autoSizePolicy;
                shrinkWrap = me.floating ? 3 : me.shrinkWrap;

                if (hasPixelWidth) {
                    widthModel = models.configured;
                }

                if (hasPixelHeight) {
                    heightModel = models.configured;
                }
            } else {
                policy = ownerLayout.getItemSizePolicy(me, ownerCtSizeModel);
                shrinkWrap = ownerLayout.isItemShrinkWrap(me);
            }

            if (ownerContext) {
                ownerContext.ownerSizePolicy = policy;
            }

            shrinkWrap = (shrinkWrap === true) ? 3 : (shrinkWrap || 0); // false->0, true->3

            // Now that we have shrinkWrap as a 0-3 value, we need to turn off shrinkWrap
            // bits for any dimension that has a configured size not in pixels. These must
            // be read from the DOM.
            //
            if (topLevel && shrinkWrap) {
                if (width && typeofWidth == 'string') {
                    shrinkWrap &= 2; // percentage, "30em" or whatever - not width shrinkWrap
                }
                if (height && typeofHeight == 'string') {
                    shrinkWrap &= 1; // percentage, "30em" or whatever - not height shrinkWrap
                }
            }

            if (shrinkWrap !== 3) {
                if (!ownerCtSizeModel) {
                    ownerCtSizeModel = me.ownerCt && me.ownerCt.getSizeModel();
                }

                if (ownerCtSizeModel) {
                    shrinkWrap |= (ownerCtSizeModel.width.shrinkWrap ? 1 : 0) | (ownerCtSizeModel.height.shrinkWrap ? 2 : 0);
                }
            }

            if (!widthModel) {
                if (!policy.setsWidth) {
                    if (hasPixelWidth) {
                        widthModel = models.configured;
                    } else {
                        widthModel = (shrinkWrap & 1) ? models.shrinkWrap : models.natural;
                    }
                } else if (policy.readsWidth) {
                    if (hasPixelWidth) {
                        widthModel = models.calculatedFromConfigured;
                    } else {
                        widthModel = (shrinkWrap & 1) ? models.calculatedFromShrinkWrap :
                                    models.calculatedFromNatural;
                    }
                } else {
                    widthModel = models.calculated;
                }
            }

            if (!heightModel) {
                if (!policy.setsHeight) {
                    if (hasPixelHeight) {
                        heightModel = models.configured;
                    } else {
                        heightModel = (shrinkWrap & 2) ? models.shrinkWrap : models.natural;
                    }
                } else if (policy.readsHeight) {
                    if (hasPixelHeight) {
                        heightModel = models.calculatedFromConfigured;
                    } else {
                        heightModel = (shrinkWrap & 2) ? models.calculatedFromShrinkWrap :
                                    models.calculatedFromNatural;
                    }
                } else {
                    heightModel = models.calculated;
                }
            }
        }

        // We return one of the cached objects with the proper "width" and "height" as the
        // sizeModels we have determined.
        return widthModel.pairsByHeightOrdinal[heightModel.ordinal];
    },

    isDescendant: function(ancestor) {
        if (ancestor.isContainer) {
            for (var c = this.ownerCt; c; c = c.ownerCt) {
                if (c === ancestor) {
                    return true;
                }
            }
        }
        return false;
    },

    /**
     * This method needs to be called whenever you change something on this component that requires the Component's
     * layout to be recalculated.
     * @return {Ext.container.Container} this
     */
    doComponentLayout : function() {
        this.updateLayout();
        return this;
    },

    /**
     * Forces this component to redo its componentLayout.
     * @deprecated 4.1.0 Use {@link #updateLayout} instead.
     */
    forceComponentLayout: function () {
        this.updateLayout();
    },

    // @private
    setComponentLayout : function(layout) {
        var currentLayout = this.componentLayout;
        if (currentLayout && currentLayout.isLayout && currentLayout != layout) {
            currentLayout.setOwner(null);
        }
        this.componentLayout = layout;
        layout.setOwner(this);
    },

    getComponentLayout : function() {
        var me = this;

        if (!me.componentLayout || !me.componentLayout.isLayout) {
            me.setComponentLayout(Ext.layout.Layout.create(me.componentLayout, 'autocomponent'));
        }
        return me.componentLayout;
    },

    /**
     * Called by the layout system after the Component has been laid out.
     *
     * @param {Number} width The width that was set
     * @param {Number} height The height that was set
     * @param {Number/undefined} oldWidth The old width, or `undefined` if this was the initial layout.
     * @param {Number/undefined} oldHeight The old height, or `undefined` if this was the initial layout.
     *
     * @template
     * @protected
     */
    afterComponentLayout: function(width, height, oldWidth, oldHeight) {
        var me = this;

        if (++me.componentLayoutCounter === 1) {
            me.afterFirstLayout(width, height);
        }

        if (width !== oldWidth || height !== oldHeight) {
            me.onResize(width, height, oldWidth, oldHeight);
        }
    },

    /**
     * Occurs before `componentLayout` is run. Returning `false` from this method will prevent the `componentLayout` from
     * being executed.
     *
     * @param {Number} adjWidth The box-adjusted width that was set.
     * @param {Number} adjHeight The box-adjusted height that was set.
     *
     * @template
     * @protected
     */
    beforeComponentLayout: function(width, height) {
        return true;
    },

    /**
     * @member Ext.Component
     * Sets the left and top of the component. To set the page XY position instead, use {@link Ext.Component#setPagePosition setPagePosition}. This
     * method fires the {@link #event-move} event.
     * @param {Number/Number[]/Object} x The new left, an array of `[x,y]`, or animation config object containing `x` and `y` properties.
     * @param {Number} [y] The new top.
     * @param {Boolean/Object} [animate] If `true`, the Component is _animated_ into its new position. You may also pass an
     * animation configuration.
     * @return {Ext.Component} this
     */
    setPosition: function(x, y, animate) {
        var me = this,
            pos = me.beforeSetPosition.apply(me, arguments);

        if (pos && me.rendered) {
            x = pos.x;
            y = pos.y;

            if (animate) {
                // Proceed only if the new position is different from the current
                // one. We only do these DOM reads in the animate case as we don't
                // want to incur the penalty of read/write on every call to setPosition
                if (x !== me.getLocalX() || y !== me.getLocalY()) {
                    me.stopAnimation();
                    me.animate(Ext.apply({
                        duration: 1000,
                        listeners: {
                            afteranimate: Ext.Function.bind(me.afterSetPosition, me, [x, y])
                        },
                        to: {
                            // Use local coordinates for a component
                            // We don't need to normalize this for RTL, the anim.target.Component
                            // calls setPosition, which will normalize the x value to right when
                            // it's necessary
                            left: x,
                            top: y
                        }
                    }, animate));
                }
            } else {
                me.setLocalXY(x, y);
                me.afterSetPosition(x, y);
            }
        }
        return me;
    },

    /**
     * @private Template method called before a Component is positioned.
     *
     * Ensures that the position is adjusted so that the Component is constrained if so configured.
     */
    beforeSetPosition: function (x, y, animate) {
        var pos, x0;

        // Decode members of x if x is an array or an object.
        // If it is numeric (including zero), we need do nothing.
        if (x) {
            // Position in first argument as an array of [x, y]
            if (Ext.isNumber(x0 = x[0])) {
                animate = y;
                y = x[1];
                x = x0;
            }
            // Position in first argument as object w/ x & y properties
            else if ((x0 = x.x) !== undefined) {
                animate = y;
                y = x.y;
                x = x0;
            }
        }

        if (this.constrain || this.constrainHeader) {
            pos = this.calculateConstrainedPosition(null, [x, y], true);
            if (pos) {
                x = pos[0];
                y = pos[1];
            }
        }

        // Set up the return info and store the position in this object
        pos = {
            x : this.x = x,
            y : this.y = y,
            anim: animate,
            hasX: x !== undefined,
            hasY: y !== undefined
        };

        return (pos.hasX || pos.hasY) ? pos : null;
    },

    /**
     * Template method called after a Component has been positioned.
     *
     * @param {Number} x
     * @param {Number} y
     *
     * @template
     * @protected
     */
    afterSetPosition: function(x, y) {
        var me = this;
        me.onPosition(x, y);
        if (me.hasListeners.move) {
            me.fireEvent('move', me, x, y);
        }
    },

    /**
     * Called after the component is moved, this method is empty by default but can be implemented by any
     * subclass that needs to perform custom logic after a move occurs.
     *
     * @param {Number} x The new x position.
     * @param {Number} y The new y position.
     *
     * @template
     * @protected
     */
    onPosition: Ext.emptyFn,

    /**
     * Sets the width of the component. This method fires the {@link #resize} event.
     *
     * @param {Number} width The new width to setThis may be one of:
     *
     *   - A Number specifying the new width in the {@link #getEl Element}'s {@link Ext.Element#defaultUnit}s (by default, pixels).
     *   - A String used to set the CSS width style.
     *
     * @return {Ext.Component} this
     */
    setWidth : function(width) {
        return this.setSize(width);
    },

    /**
     * Sets the height of the component. This method fires the {@link #resize} event.
     *
     * @param {Number} height The new height to set. This may be one of:
     *
     *   - A Number specifying the new height in the {@link #getEl Element}'s {@link Ext.Element#defaultUnit}s (by default, pixels).
     *   - A String used to set the CSS height style.
     *   - _undefined_ to leave the height unchanged.
     *
     * @return {Ext.Component} this
     */
    setHeight : function(height) {
        return this.setSize(undefined, height);
    },

    /**
     * Gets the current size of the component's underlying element.
     * @param {Boolean} [contentSize] true to get the width/size minus borders and padding
     * @return {Object} An object containing the element's size:
     * @return {Number} return.width
     * @return {Number} return.height
     */
    getSize : function(contentSize) {
        return this.el.getSize(contentSize);
    },

    /**
     * Gets the current width of the component's underlying element.
     * @return {Number}
     */
    getWidth : function() {
        return this.el.getWidth();
    },

    /**
     * Gets the current height of the component's underlying element.
     * @return {Number}
     */
    getHeight : function() {
        return this.el.getHeight();
    },

    /**
     * Gets the {@link Ext.ComponentLoader} for this Component.
     * @return {Ext.ComponentLoader} The loader instance, null if it doesn't exist.
     */
    getLoader: function(){
        var me = this,
            autoLoad = me.autoLoad ? (Ext.isObject(me.autoLoad) ? me.autoLoad : {url: me.autoLoad}) : null,
            loader = me.loader || autoLoad;

        if (loader) {
            if (!loader.isLoader) {
                me.loader = new Ext.ComponentLoader(Ext.apply({
                    target: me,
                    autoLoad: autoLoad
                }, loader));
            } else {
                loader.setTarget(me);
            }
            return me.loader;

        }
        return null;
    },

    /**
     * Sets the dock position of this component in its parent panel. Note that this only has effect if this item is part
     * of the `dockedItems` collection of a parent that has a DockLayout (note that any Panel has a DockLayout by default)
     * @param {Object} dock The dock position.
     * @param {Boolean} [layoutParent=false] `true` to re-layout parent.
     * @return {Ext.Component} this
     */
    setDocked : function(dock, layoutParent) {
        var me = this;

        me.dock = dock;
        if (layoutParent && me.ownerCt && me.rendered) {
            me.ownerCt.updateLayout();
        }
        return me;
    },

    /**
     *
     * @param {String/Number} border The border, see {@link #border}. If a falsey value is passed
     * the border will be removed.
     */
    setBorder: function(border, /* private */ targetEl) {
        var me = this,
            initial = !!targetEl;

        if (me.rendered || initial) {
            if (!initial) {
                targetEl = me.el;
            }

            if (!border) {
                border = 0;
            } else if (border === true) {
                border = '1px';
            } else {
                border = this.unitizeBox(border);
            }
            targetEl.setStyle('border-width', border);
            if (!initial) {
                me.updateLayout();
            }
        }
        me.border = border;
    },

    onDestroy : function() {
        var me = this;

        if (me.monitorResize && Ext.EventManager.resizeEvent) {
            Ext.EventManager.resizeEvent.removeListener(me.setSize, me);
        }

        // Destroying the floatingItems ZIndexManager will also destroy descendant floating Components
        Ext.destroy(
            me.componentLayout,
            me.loadMask,
            me.floatingDescendants
        );
    },

    /**
     * Destroys the Component.
     * @since 1.1.0
     */
    destroy : function() {
        var me = this,
            selectors = me.renderSelectors,
            selector,
            el;

        if (!me.isDestroyed) {
            if (!me.hasListeners.beforedestroy || me.fireEvent('beforedestroy', me) !== false) {
                me.destroying = true;
                me.beforeDestroy();

                if (me.floating) {
                    delete me.floatParent;
                    // A zIndexManager is stamped into a *floating* Component when it is added to a Container.
                    // If it has no zIndexManager at render time, it is assigned to the global Ext.WindowManager instance.
                    if (me.zIndexManager) {
                        me.zIndexManager.unregister(me);
                    }
                } else if (me.ownerCt && me.ownerCt.remove) {
                    me.ownerCt.remove(me, false);
                }

                me.stopAnimation();
                me.onDestroy();

                // Attempt to destroy all plugins
                Ext.destroy(me.plugins);

                if (me.hasListeners.destroy) {
                    me.fireEvent('destroy', me);
                }
                Ext.ComponentManager.unregister(me);

                me.mixins.state.destroy.call(me);

                me.clearListeners();
                // make sure we clean up the element references after removing all events
                if (me.rendered) {
                    if (!me.preserveElOnDestroy) {
                        me.el.remove();
                    }
                    me.mixins.elementCt.destroy.call(me); // removes childEls
                    if (selectors) {
                        for (selector in selectors) {
                            if (selectors.hasOwnProperty(selector)) {
                                el = me[selector];
                                if (el) { // in case any other code may have already removed it
                                    delete me[selector];
                                    el.remove();
                                }
                            }
                        }
                    }

                    delete me.el;
                    delete me.frameBody;
                    delete me.rendered;
                }

                me.destroying = false;
                me.isDestroyed = true;
            }
        }
    },

    /**
     * Determines whether this component is the descendant of a particular container.
     * @param {Ext.Container} container
     * @return {Boolean} `true` if the component is the descendant of a particular container, otherwise `false`.
     */
    isDescendantOf: function(container) {
        return !!this.findParentBy(function(p){
            return p === container;
        });
    },

    /**
     * A component's hierarchyState is used to keep track of aspects of a component's
     * state that affect its descendants hierarchically like "collapsed" and "hidden".
     * For example, if this.hierarchyState.hidden == true, it means that either this
     * component, or one of its ancestors is hidden. 
     * 
     * Hierarchical state management is implemented by chaining each component's
     * hierarchyState property to its parent container's hierarchyState property via the
     * prototype. The result is such that if a component's hierarchyState does not have
     * it's own property, it inherits the property from the nearest ancestor that does.
     * 
     * To set a hierarchical "hidden" value:
     * 
     *     this.getHierarchyState().hidden = true;
     *     
     * It is important to remember when unsetting hierarchyState properties to delete
     * them instead of just setting them to a falsy value.  This ensures that the
     * hierarchyState returns to a state of inheriting the value instead of overriding it
     * To unset the hierarchical "hidden" value:
     * 
     *     delete this.getHierarchyState().hidden;
     * 
     * IMPORTANT! ALWAYS access hierarchyState using this method, not by accessing
     * this.hierarchyState directly.  The hierarchyState property does not exist until
     * the first time getHierarchyState() is called.  At that point getHierarchyState()
     * walks up the component tree to establish the hierarchyState prototype chain.
     * Additionally the hierarchyState property should NOT be relied upon even after
     * the initial call to getHierarchyState() because  it is possible for the
     * hierarchyState to be invalidated. Invalidation typically happens when a component
     * is moved to a new container. In such a case the hierarchy state remains invalid
     * until the next time getHierarchyState() is called on the component or one of its
     * descendants.
     * 
     * @private
     */
    getHierarchyState: function (inner) {
        var me = this,
            hierarchyState = (inner && me.hierarchyStateInner) || me.hierarchyState,
            ownerCt = me.ownerCt,
            parent, layout, hierarchyStateInner, getInner;
 
        if (!hierarchyState || hierarchyState.invalid) {
            // Use upward navigational link, not ownerCt.
            // 99% of the time, this will use ownerCt/floatParent.
            // Certain floating components do not have an ownerCt, but they are still linked
            // into a navigational hierarchy. The getRefOwner method normalizes these differences.
            parent = me.getRefOwner();
            
            if (ownerCt) {
                // This will only be true if the item is a "child" of its owning container
                // For example, a docked item will not get the inner hierarchy state
                getInner = me.ownerLayout === ownerCt.layout;
            }

            me.hierarchyState = hierarchyState =
                // chain this component's hierarchyState to that of its parent.  If it
                // doesn't have a parent, then chain to the rootHierarchyState.  This is
                // done so that when there is a viewport, all component's will inherit
                // from its hierarchyState, even components that are not descendants of
                // the viewport.
                Ext.Object.chain(parent ? parent.getHierarchyState(getInner)
                                        : Ext.rootHierarchyState);

            me.initHierarchyState(hierarchyState);
            if ((layout = me.componentLayout).initHierarchyState) {
                layout.initHierarchyState(hierarchyState);
            }

            if (me.isContainer) {
                me.hierarchyStateInner = hierarchyStateInner = Ext.Object.chain(hierarchyState);

                layout = me.layout;
                if (layout && layout.initHierarchyState) {
                    layout.initHierarchyState(hierarchyStateInner, hierarchyState);
                }
                if (inner) {
                    hierarchyState = hierarchyStateInner;
                }
            }
        }

        return hierarchyState;
    },

    /**
     * Called by {@link #getHierarchyState} to initialize the hierarchyState the first
     * time it is requested.
     * @private
     */
    initHierarchyState: function(hierarchyState) {
        var me = this;

        if (me.collapsed) {
            hierarchyState.collapsed = true;
        }
        if (me.hidden) {
            hierarchyState.hidden = true;
        }
        if (me.collapseImmune) {
            hierarchyState.collapseImmune = true;
        }
    },

    // **********************************************************************************
    // Begin Positionable methods
    // **********************************************************************************

    getAnchorToXY: function(el, anchor, local, mySize) {
        return el.getAnchorXY(anchor, local, mySize);
    },

    getBorderPadding: function() {
        return this.el.getBorderPadding();
    },

    getLocalX: function() {
        return this.el.getLocalX();
    },

    getLocalXY: function() {
        return this.el.getLocalXY();
    },

    getLocalY: function() {
        return this.el.getLocalY();
    },

    getX: function() {
        return this.el.getX();
    },

    getXY: function() {
        return this.el.getXY();
    },

    getY: function() {
        return this.el.getY();
    },

    setLocalX: function(x) {
        this.el.setLocalX(x);
    },

    setLocalXY: function(x, y) {
        this.el.setLocalXY(x, y);
    },

    setLocalY: function(y) {
        this.el.setLocalY(y);
    },

    setX: function(x, animate) {
        this.el.setX(x, animate);
    },

    setXY: function(xy, animate) {
        this.el.setXY(xy, animate);
    },

    setY: function(y, animate) {
        this.el.setY(y, animate);
    }

    // **********************************************************************************
    // End Positionable methods
    // **********************************************************************************
}, function() {
    var AbstractComponent = this;

    AbstractComponent.createAlias({
        on: 'addListener',
        prev: 'previousSibling',
        next: 'nextSibling'
    });

    /**
     * @inheritdoc Ext.AbstractComponent#resumeLayouts
     * @member Ext
     */
    Ext.resumeLayouts = function (flush) {
        AbstractComponent.resumeLayouts(flush);
    };

    /**
     * @inheritdoc Ext.AbstractComponent#suspendLayouts
     * @member Ext
     */
    Ext.suspendLayouts = function () {
        AbstractComponent.suspendLayouts();
    };

    /**
     * Utility wrapper that suspends layouts of all components for the duration of a given function.
     * @param {Function} fn The function to execute.
     * @param {Object} [scope] The scope (`this` reference) in which the specified function is executed.
     * @member Ext
     */
    Ext.batchLayouts = function(fn, scope) {
        AbstractComponent.suspendLayouts();
        // Invoke the function
        fn.call(scope);
        AbstractComponent.resumeLayouts(true);
    };
});
