X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/25ef3491bd9ae007ff1fc2b0d7943e6eaaccf775..10a866c12701c0a0afd0ac85dcdcf32a421514ac:/docs/source/Container.html diff --git a/docs/source/Container.html b/docs/source/Container.html index c8c7f5d0..9495b6e6 100644 --- a/docs/source/Container.html +++ b/docs/source/Container.html @@ -1,963 +1,1012 @@ - - - The source code - - - - - 
/*!
- * Ext JS Library 3.0.3
- * Copyright(c) 2006-2009 Ext JS, LLC
- * licensing@extjs.com
- * http://www.extjs.com/license
+
+
+      
+  The source code
+    
+    
+
+
+    
/**
+ * @class Ext.Container
+ * @extends Ext.BoxComponent
+ * 
Base class for any {@link Ext.BoxComponent} that may contain other Components. Containers handle the
+ * basic behavior of containing items, namely adding, inserting and removing items.

+ *
+ * 
The most commonly used Container classes are {@link Ext.Panel}, {@link Ext.Window} and {@link Ext.TabPanel}.
+ * If you do not need the capabilities offered by the aforementioned classes you can create a lightweight
+ * Container to be encapsulated by an HTML element to your specifications by using the
+ * {@link Ext.Component#autoEl autoEl} config option. This is a useful technique when creating
+ * embedded {@link Ext.layout.ColumnLayout column} layouts inside {@link Ext.form.FormPanel FormPanels}
+ * for example.

+ *
+ * 
The code below illustrates both how to explicitly create a Container, and how to implicitly
+ * create one using the 'container' xtype:

+// explicitly create a Container
+var embeddedColumns = new Ext.Container({
+    autoEl: 'div',  // This is the default
+    layout: 'column',
+    defaults: {
+        // implicitly create Container by specifying xtype
+        xtype: 'container',
+        autoEl: 'div', // This is the default.
+        layout: 'form',
+        columnWidth: 0.5,
+        style: {
+            padding: '10px'
+        }
+    },
+//  The two items below will be Ext.Containers, each encapsulated by a <DIV> element.
+    items: [{
+        items: {
+            xtype: 'datefield',
+            name: 'startDate',
+            fieldLabel: 'Start date'
+        }
+    }, {
+        items: {
+            xtype: 'datefield',
+            name: 'endDate',
+            fieldLabel: 'End date'
+        }
+    }]
+});

+ *
+ * 
Layout

+ * 
Container classes delegate the rendering of child Components to a layout
+ * manager class which must be configured into the Container using the
+ * {@link #layout} configuration property.

+ * 
When either specifying child {@link #items} of a Container,
+ * or dynamically {@link #add adding} Components to a Container, remember to
+ * consider how you wish the Container to arrange those child elements, and
+ * whether those child elements need to be sized using one of Ext's built-in
+ * {@link #layout} schemes. By default, Containers use the
+ * {@link Ext.layout.ContainerLayout ContainerLayout} scheme which only
+ * renders child components, appending them one after the other inside the
+ * Container, and does not apply any sizing at all.

+ * 
A common mistake is when a developer neglects to specify a
+ * {@link #layout} (e.g. widgets like GridPanels or
+ * TreePanels are added to Containers for which no {@link #layout}
+ * has been specified). If a Container is left to use the default
+ * {@link Ext.layout.ContainerLayout ContainerLayout} scheme, none of its
+ * child components will be resized, or changed in any way when the Container
+ * is resized.

+ * 
Certain layout managers allow dynamic addition of child components.
+ * Those that do include {@link Ext.layout.CardLayout},
+ * {@link Ext.layout.AnchorLayout}, {@link Ext.layout.FormLayout}, and
+ * {@link Ext.layout.TableLayout}. For example:

+//  Create the GridPanel.
+var myNewGrid = new Ext.grid.GridPanel({
+    store: myStore,
+    columns: myColumnModel,
+    title: 'Results', // the title becomes the title of the tab
+});
+
+myTabPanel.add(myNewGrid); // {@link Ext.TabPanel} implicitly uses {@link Ext.layout.CardLayout CardLayout}
+myTabPanel.{@link Ext.TabPanel#setActiveTab setActiveTab}(myNewGrid);
+ * 

+ * 
The example above adds a newly created GridPanel to a TabPanel. Note that
+ * a TabPanel uses {@link Ext.layout.CardLayout} as its layout manager which
+ * means all its child items are sized to {@link Ext.layout.FitLayout fit}
+ * exactly into its client area.
+ * 
Overnesting is a common problem.
+ * An example of overnesting occurs when a GridPanel is added to a TabPanel
+ * by wrapping the GridPanel inside a wrapping Panel (that has no
+ * {@link #layout} specified) and then add that wrapping Panel
+ * to the TabPanel. The point to realize is that a GridPanel is a
+ * Component which can be added directly to a Container. If the wrapping Panel
+ * has no {@link #layout} configuration, then the overnested
+ * GridPanel will not be sized as expected.

+ *
+ * 
Adding via remote configuration

+ *
+ * 
A server side script can be used to add Components which are generated dynamically on the server.
+ * An example of adding a GridPanel to a TabPanel where the GridPanel is generated by the server
+ * based on certain parameters:
+ * 

+// execute an Ajax request to invoke server side script:
+Ext.Ajax.request({
+    url: 'gen-invoice-grid.php',
+    // send additional parameters to instruct server script
+    params: {
+        startDate: Ext.getCmp('start-date').getValue(),
+        endDate: Ext.getCmp('end-date').getValue()
+    },
+    // process the response object to add it to the TabPanel:
+    success: function(xhr) {
+        var newComponent = eval(xhr.responseText); // see discussion below
+        myTabPanel.add(newComponent); // add the component to the TabPanel
+        myTabPanel.setActiveTab(newComponent);
+    },
+    failure: function() {
+        Ext.Msg.alert("Grid create failed", "Server communication failure");
+    }
+});
+

+ * 
The server script needs to return an executable Javascript statement which, when processed
+ * using eval(), will return either a config object with an {@link Ext.Component#xtype xtype},
+ * or an instantiated Component. The server might return this for example:

+(function() {
+    function formatDate(value){
+        return value ? value.dateFormat('M d, Y') : '';
+    };
+
+    var store = new Ext.data.Store({
+        url: 'get-invoice-data.php',
+        baseParams: {
+            startDate: '01/01/2008',
+            endDate: '01/31/2008'
+        },
+        reader: new Ext.data.JsonReader({
+            record: 'transaction',
+            idProperty: 'id',
+            totalRecords: 'total'
+        }, [
+           'customer',
+           'invNo',
+           {name: 'date', type: 'date', dateFormat: 'm/d/Y'},
+           {name: 'value', type: 'float'}
+        ])
+    });
+
+    var grid = new Ext.grid.GridPanel({
+        title: 'Invoice Report',
+        bbar: new Ext.PagingToolbar(store),
+        store: store,
+        columns: [
+            {header: "Customer", width: 250, dataIndex: 'customer', sortable: true},
+            {header: "Invoice Number", width: 120, dataIndex: 'invNo', sortable: true},
+            {header: "Invoice Date", width: 100, dataIndex: 'date', renderer: formatDate, sortable: true},
+            {header: "Value", width: 120, dataIndex: 'value', renderer: 'usMoney', sortable: true}
+        ],
+    });
+    store.load();
+    return grid;  // return instantiated component
+})();
+

+ * 
When the above code fragment is passed through the eval function in the success handler
+ * of the Ajax request, the code is executed by the Javascript processor, and the anonymous function
+ * runs, and returns the instantiated grid component.

+ * 
Note: since the code above is generated by a server script, the baseParams for
+ * the Store, the metadata to allow generation of the Record layout, and the ColumnModel
+ * can all be generated into the code since these are all known on the server.

+ *
+ * @xtype container
  */
-
/**
- * @class Ext.Container
- * @extends Ext.BoxComponent
- * 
Base class for any {@link Ext.BoxComponent} that may contain other Components. Containers handle the
- * basic behavior of containing items, namely adding, inserting and removing items.

- *
- * 
The most commonly used Container classes are {@link Ext.Panel}, {@link Ext.Window} and {@link Ext.TabPanel}.
- * If you do not need the capabilities offered by the aforementioned classes you can create a lightweight
- * Container to be encapsulated by an HTML element to your specifications by using the
- * {@link Ext.Component#autoEl autoEl} config option. This is a useful technique when creating
- * embedded {@link Ext.layout.ColumnLayout column} layouts inside {@link Ext.form.FormPanel FormPanels}
- * for example.

- *
- * 
The code below illustrates both how to explicitly create a Container, and how to implicitly
- * create one using the 'container' xtype:

-// explicitly create a Container
-var embeddedColumns = new Ext.Container({
-    autoEl: 'div',  // This is the default
-    layout: 'column',
-    defaults: {
-        // implicitly create Container by specifying xtype
-        xtype: 'container',
-        autoEl: 'div', // This is the default.
-        layout: 'form',
-        columnWidth: 0.5,
-        style: {
-            padding: '10px'
-        }
-    },
-//  The two items below will be Ext.Containers, each encapsulated by a <DIV> element.
-    items: [{
-        items: {
-            xtype: 'datefield',
-            name: 'startDate',
-            fieldLabel: 'Start date'
-        }
-    }, {
-        items: {
-            xtype: 'datefield',
-            name: 'endDate',
-            fieldLabel: 'End date'
-        }
-    }]
-});

- *
- * 
Layout

- * 
Container classes delegate the rendering of child Components to a layout
- * manager class which must be configured into the Container using the
- * {@link #layout} configuration property.

- * 
When either specifying child {@link #items} of a Container,
- * or dynamically {@link #add adding} Components to a Container, remember to
- * consider how you wish the Container to arrange those child elements, and
- * whether those child elements need to be sized using one of Ext's built-in
- * {@link #layout} schemes. By default, Containers use the
- * {@link Ext.layout.ContainerLayout ContainerLayout} scheme which only
- * renders child components, appending them one after the other inside the
- * Container, and does not apply any sizing at all.

- * 
A common mistake is when a developer neglects to specify a
- * {@link #layout} (e.g. widgets like GridPanels or
- * TreePanels are added to Containers for which no {@link #layout}
- * has been specified). If a Container is left to use the default
- * {@link Ext.layout.ContainerLayout ContainerLayout} scheme, none of its
- * child components will be resized, or changed in any way when the Container
- * is resized.

- * 
Certain layout managers allow dynamic addition of child components.
- * Those that do include {@link Ext.layout.CardLayout},
- * {@link Ext.layout.AnchorLayout}, {@link Ext.layout.FormLayout}, and
- * {@link Ext.layout.TableLayout}. For example:

-//  Create the GridPanel.
-var myNewGrid = new Ext.grid.GridPanel({
-    store: myStore,
-    columns: myColumnModel,
-    title: 'Results', // the title becomes the title of the tab
-});
-
-myTabPanel.add(myNewGrid); // {@link Ext.TabPanel} implicitly uses {@link Ext.layout.CardLayout CardLayout}
-myTabPanel.{@link Ext.TabPanel#setActiveTab setActiveTab}(myNewGrid);
- * 

- * 
The example above adds a newly created GridPanel to a TabPanel. Note that
- * a TabPanel uses {@link Ext.layout.CardLayout} as its layout manager which
- * means all its child items are sized to {@link Ext.layout.FitLayout fit}
- * exactly into its client area.
- * 
Overnesting is a common problem.
- * An example of overnesting occurs when a GridPanel is added to a TabPanel
- * by wrapping the GridPanel inside a wrapping Panel (that has no
- * {@link #layout} specified) and then add that wrapping Panel
- * to the TabPanel. The point to realize is that a GridPanel is a
- * Component which can be added directly to a Container. If the wrapping Panel
- * has no {@link #layout} configuration, then the overnested
- * GridPanel will not be sized as expected.

- *
- * 
Adding via remote configuration

- *
- * 
A server side script can be used to add Components which are generated dynamically on the server.
- * An example of adding a GridPanel to a TabPanel where the GridPanel is generated by the server
- * based on certain parameters:
- * 

-// execute an Ajax request to invoke server side script:
-Ext.Ajax.request({
-    url: 'gen-invoice-grid.php',
-    // send additional parameters to instruct server script
-    params: {
-        startDate: Ext.getCmp('start-date').getValue(),
-        endDate: Ext.getCmp('end-date').getValue()
-    },
-    // process the response object to add it to the TabPanel:
-    success: function(xhr) {
-        var newComponent = eval(xhr.responseText); // see discussion below
-        myTabPanel.add(newComponent); // add the component to the TabPanel
-        myTabPanel.setActiveTab(newComponent);
-    },
-    failure: function() {
-        Ext.Msg.alert("Grid create failed", "Server communication failure");
-    }
-});
-

- * 
The server script needs to return an executable Javascript statement which, when processed
- * using eval(), will return either a config object with an {@link Ext.Component#xtype xtype},
- * or an instantiated Component. The server might return this for example:

-(function() {
-    function formatDate(value){
-        return value ? value.dateFormat('M d, Y') : '';
-    };
-
-    var store = new Ext.data.Store({
-        url: 'get-invoice-data.php',
-        baseParams: {
-            startDate: '01/01/2008',
-            endDate: '01/31/2008'
-        },
-        reader: new Ext.data.JsonReader({
-            record: 'transaction',
-            idProperty: 'id',
-            totalRecords: 'total'
-        }, [
-           'customer',
-           'invNo',
-           {name: 'date', type: 'date', dateFormat: 'm/d/Y'},
-           {name: 'value', type: 'float'}
-        ])
-    });
-
-    var grid = new Ext.grid.GridPanel({
-        title: 'Invoice Report',
-        bbar: new Ext.PagingToolbar(store),
-        store: store,
-        columns: [
-            {header: "Customer", width: 250, dataIndex: 'customer', sortable: true},
-            {header: "Invoice Number", width: 120, dataIndex: 'invNo', sortable: true},
-            {header: "Invoice Date", width: 100, dataIndex: 'date', renderer: formatDate, sortable: true},
-            {header: "Value", width: 120, dataIndex: 'value', renderer: 'usMoney', sortable: true}
-        ],
-    });
-    store.load();
-    return grid;  // return instantiated component
-})();
-

- * 
When the above code fragment is passed through the eval function in the success handler
- * of the Ajax request, the code is executed by the Javascript processor, and the anonymous function
- * runs, and returns the instantiated grid component.

- * 
Note: since the code above is generated by a server script, the baseParams for
- * the Store, the metadata to allow generation of the Record layout, and the ColumnModel
- * can all be generated into the code since these are all known on the server.

- *
- * @xtype container
- */
-Ext.Container = Ext.extend(Ext.BoxComponent, {
-    
/**
-     * @cfg {Boolean} monitorResize
-     * True to automatically monitor window resize events to handle anything that is sensitive to the current size
-     * of the viewport.  This value is typically managed by the chosen {@link #layout} and should not need
-     * to be set manually.
-     */
-    
/**
-     * @cfg {String/Object} layout
-     * 
*Important: In order for child items to be correctly sized and
-     * positioned, typically a layout manager must be specified through
-     * the layout configuration option.

-     * 
The sizing and positioning of child {@link items} is the responsibility of
-     * the Container's layout manager which creates and manages the type of layout
-     * you have in mind.  For example:

-new Ext.Window({
-    width:300, height: 300,
-    layout: 'fit', // explicitly set layout manager: override the default (layout:'auto')
-    items: [{
-        title: 'Panel inside a Window'
-    }]
-}).show();
-     * 

-     * 
If the {@link #layout} configuration is not explicitly specified for
-     * a general purpose container (e.g. Container or Panel) the
-     * {@link Ext.layout.ContainerLayout default layout manager} will be used
-     * which does nothing but render child components sequentially into the
-     * Container (no sizing or positioning will be performed in this situation).
-     * Some container classes implicitly specify a default layout
-     * (e.g. FormPanel specifies layout:'form'). Other specific
-     * purpose classes internally specify/manage their internal layout (e.g.
-     * GridPanel, TabPanel, TreePanel, Toolbar, Menu, etc.).

-     * 
layout may be specified as either as an Object or
-     * as a String:
    
-     *
-     * 
  • Specify as an Object
    • 
-     * 
      
-     * 
    • Example usage:
      • 
-
      
-layout: {
-    type: 'vbox',
-    padding: '5',
-    align: 'left'
-}
-
      
-     *
-     * 
    • type
      • 
-     * 
      The layout type to be used for this container.  If not specified,
-     * a default {@link Ext.layout.ContainerLayout} will be created and used.
      
-     * 
      Valid layout type values are:
      
-     * 
        
-     * 
      • {@link Ext.layout.AbsoluteLayout absolute}
        • 
-     * 
      • {@link Ext.layout.AccordionLayout accordion}
        • 
-     * 
      • {@link Ext.layout.AnchorLayout anchor}
        • 
-     * 
      • {@link Ext.layout.ContainerLayout auto}     Default
        • 
-     * 
      • {@link Ext.layout.BorderLayout border}
        • 
-     * 
      • {@link Ext.layout.CardLayout card}
        • 
-     * 
      • {@link Ext.layout.ColumnLayout column}
        • 
-     * 
      • {@link Ext.layout.FitLayout fit}
        • 
-     * 
      • {@link Ext.layout.FormLayout form}
        • 
-     * 
      • {@link Ext.layout.HBoxLayout hbox}
        • 
-     * 
      • {@link Ext.layout.MenuLayout menu}
        • 
-     * 
      • {@link Ext.layout.TableLayout table}
        • 
-     * 
      • {@link Ext.layout.ToolbarLayout toolbar}
        • 
-     * 
      • {@link Ext.layout.VBoxLayout vbox}
        • 
-     * 
      
-     *
-     * 
    • Layout specific configuration properties
      • 
-     * 
      Additional layout specific configuration properties may also be
-     * specified. For complete details regarding the valid config options for
-     * each layout type, see the layout class corresponding to the type
-     * specified.
      
-     *
-     * 
    
-     *
-     * 
  • Specify as a String
    • 
-     * 
      
-     * 
    • Example usage:
      • 
-
      
-layout: 'vbox',
-layoutConfig: {
-    padding: '5',
-    align: 'left'
-}
-
      
-     * 
    • layout
      • 
-     * 
      The layout type to be used for this container (see list
-     * of valid layout type values above).

      
-     * 
    • {@link #layoutConfig}
      • 
-     * 
      Additional layout specific configuration properties. For complete
-     * details regarding the valid config options for each layout type, see the
-     * layout class corresponding to the layout specified.
      
-     * 

-     */
-    
/**
-     * @cfg {Object} layoutConfig
-     * This is a config object containing properties specific to the chosen
-     * {@link #layout} if {@link #layout}
-     * has been specified as a string.

-     */
-    
/**
-     * @cfg {Boolean/Number} bufferResize
-     * When set to true (50 milliseconds) or a number of milliseconds, the layout assigned for this container will buffer
-     * the frequency it calculates and does a re-layout of components. This is useful for heavy containers or containers
-     * with a large quantity of sub-components for which frequent layout calls would be expensive. Defaults to 50.
-     */
-    bufferResize: 50,
-
-    
/**
-     * @cfg {String/Number} activeItem
-     * A string component id or the numeric index of the component that should be initially activated within the
-     * container's layout on render.  For example, activeItem: 'item-1' or activeItem: 0 (index 0 = the first
-     * item in the container's collection).  activeItem only applies to layout styles that can display
-     * items one at a time (like {@link Ext.layout.AccordionLayout}, {@link Ext.layout.CardLayout} and
-     * {@link Ext.layout.FitLayout}).  Related to {@link Ext.layout.ContainerLayout#activeItem}.
-     */
-    
/**
-     * @cfg {Object/Array} items
-     * 
** IMPORTANT: be sure to {@link #layout specify a layout} if needed ! **

-     * 
A single item, or an array of child Components to be added to this container,
-     * for example:

-     * 

-// specifying a single item
-items: {...},
-layout: 'fit',    // specify a layout!
-
-// specifying multiple items
-items: [{...}, {...}],
-layout: 'anchor', // specify a layout!
-     * 

-     * 
Each item may be:

-     * 
    
-     * 
  • any type of object based on {@link Ext.Component}
    • 
-     * 
  • a fully instanciated object or
    • 
-     * 
  • an object literal that:
    • 
-     * 
      
-     * 
    • has a specified {@link Ext.Component#xtype xtype}
      • 
-     * 
    • the {@link Ext.Component#xtype} specified is associated with the Component
-     * desired and should be chosen from one of the available xtypes as listed
-     * in {@link Ext.Component}.
      • 
-     * 
    • If an {@link Ext.Component#xtype xtype} is not explicitly
-     * specified, the {@link #defaultType} for that Container is used.
      • 
-     * 
    • will be "lazily instanciated", avoiding the overhead of constructing a fully
-     * instanciated Component object
      • 
-     * 

-     * 
Notes:

-     * 
    
-     * 
  • Ext uses lazy rendering. Child Components will only be rendered
-     * should it become necessary. Items are automatically laid out when they are first
-     * shown (no sizing is done while hidden), or in response to a {@link #doLayout} call.
    • 
-     * 
  • Do not specify {@link Ext.Panel#contentEl contentEl}/
-     * {@link Ext.Panel#html html} with items.
    • 
-     * 

-     */
-    
/**
-     * @cfg {Object} defaults
-     * 
A config object that will be applied to all components added to this container either via the {@link #items}
-     * config or via the {@link #add} or {@link #insert} methods.  The defaults config can contain any
-     * number of name/value property pairs to be added to each item, and should be valid for the types of items
-     * being added to the container.  For example, to automatically apply padding to the body of each of a set of
-     * contained {@link Ext.Panel} items, you could pass: defaults: {bodyStyle:'padding:15px'}.


-     * 
Note: defaults will not be applied to config objects if the option is already specified.
-     * For example:

-defaults: {               // defaults are applied to items, not the container
-    autoScroll:true
-},
-items: [
-    {
-        xtype: 'panel',   // defaults do not have precedence over
-        id: 'panel1',     // options in config objects, so the defaults
-        autoScroll: false // will not be applied here, panel1 will be autoScroll:false
-    },
-    new Ext.Panel({       // defaults do have precedence over options
-        id: 'panel2',     // options in components, so the defaults
-        autoScroll: false // will be applied here, panel2 will be autoScroll:true.
-    })
-]
-     * 

-     */
-
-
-    
/** @cfg {Boolean} autoDestroy
-     * If true the container will automatically destroy any contained component that is removed from it, else
-     * destruction must be handled manually (defaults to true).
-     */
-    autoDestroy : true,
-
-    
/** @cfg {Boolean} forceLayout
-     * If true the container will force a layout initially even if hidden or collapsed. This option
-     * is useful for forcing forms to render in collapsed or hidden containers. (defaults to false).
-     */
-    forceLayout: false,
-
-    
/** @cfg {Boolean} hideBorders
-     * True to hide the borders of each contained component, false to defer to the component's existing
-     * border settings (defaults to false).
-     */
-    
/** @cfg {String} defaultType
-     * 
The default {@link Ext.Component xtype} of child Components to create in this Container when
-     * a child item is specified as a raw configuration object, rather than as an instantiated Component.

-     * 
Defaults to 'panel', except {@link Ext.menu.Menu} which defaults to 'menuitem',
-     * and {@link Ext.Toolbar} and {@link Ext.ButtonGroup} which default to 'button'.

-     */
-    defaultType : 'panel',
-
-    
/** @cfg {String} resizeEvent
-     * The event to listen to for resizing in layouts. Defaults to 'resize'.
-     */
-    resizeEvent: 'resize',
-    
-    
/**
-     * @cfg {Array} bubbleEvents
-     * 
An array of events that, when fired, should be bubbled to any parent container.
-     * Defaults to ['add', 'remove'].
-     */
-    bubbleEvents: ['add', 'remove'],
-
-    // private
-    initComponent : function(){
-        Ext.Container.superclass.initComponent.call(this);
-
-        this.addEvents(
-            
/**
-             * @event afterlayout
-             * Fires when the components in this container are arranged by the associated layout manager.
-             * @param {Ext.Container} this
-             * @param {ContainerLayout} layout The ContainerLayout implementation for this container
-             */
-            'afterlayout',
-            
/**
-             * @event beforeadd
-             * Fires before any {@link Ext.Component} is added or inserted into the container.
-             * A handler can return false to cancel the add.
-             * @param {Ext.Container} this
-             * @param {Ext.Component} component The component being added
-             * @param {Number} index The index at which the component will be added to the container's items collection
-             */
-            'beforeadd',
-            
/**
-             * @event beforeremove
-             * Fires before any {@link Ext.Component} is removed from the container.  A handler can return
-             * false to cancel the remove.
-             * @param {Ext.Container} this
-             * @param {Ext.Component} component The component being removed
-             */
-            'beforeremove',
-            
/**
-             * @event add
-             * @bubbles
-             * Fires after any {@link Ext.Component} is added or inserted into the container.
-             * @param {Ext.Container} this
-             * @param {Ext.Component} component The component that was added
-             * @param {Number} index The index at which the component was added to the container's items collection
-             */
-            'add',
-            
/**
-             * @event remove
-             * @bubbles
-             * Fires after any {@link Ext.Component} is removed from the container.
-             * @param {Ext.Container} this
-             * @param {Ext.Component} component The component that was removed
-             */
-            'remove'
-        );
-
-        this.enableBubble(this.bubbleEvents);
-
-        
/**
-         * The collection of components in this container as a {@link Ext.util.MixedCollection}
-         * @type MixedCollection
-         * @property items
-         */
-        var items = this.items;
-        if(items){
-            delete this.items;
-            this.add(items);
-        }
-    },
-
-    // private
-    initItems : function(){
-        if(!this.items){
-            this.items = new Ext.util.MixedCollection(false, this.getComponentId);
-            this.getLayout(); // initialize the layout
-        }
-    },
-
-    // private
-    setLayout : function(layout){
-        if(this.layout && this.layout != layout){
-            this.layout.setContainer(null);
-        }
-        this.initItems();
-        this.layout = layout;
-        layout.setContainer(this);
-    },
-
-    afterRender: function(){
-        Ext.Container.superclass.afterRender.call(this);
-        if(!this.layout){
-            this.layout = 'auto';
-        }
-        if(Ext.isObject(this.layout) && !this.layout.layout){
-            this.layoutConfig = this.layout;
-            this.layout = this.layoutConfig.type;
-        }
-        if(Ext.isString(this.layout)){
-            this.layout = new Ext.Container.LAYOUTS[this.layout.toLowerCase()](this.layoutConfig);
-        }
-        this.setLayout(this.layout);
-
-        if(this.activeItem !== undefined){
-            var item = this.activeItem;
-            delete this.activeItem;
-            this.layout.setActiveItem(item);
-        }
-        if(!this.ownerCt){
-            // force a layout if no ownerCt is set
-            this.doLayout(false, true);
-        }
-        if(this.monitorResize === true){
-            Ext.EventManager.onWindowResize(this.doLayout, this, [false]);
-        }
-    },
-
-    
/**
-     * 
Returns the Element to be used to contain the child Components of this Container.

-     * 
An implementation is provided which returns the Container's {@link #getEl Element}, but
-     * if there is a more complex structure to a Container, this may be overridden to return
-     * the element into which the {@link #layout layout} renders child Components.

-     * @return {Ext.Element} The Element to render child Components into.
-     */
-    getLayoutTarget : function(){
-        return this.el;
-    },
-
-    // private - used as the key lookup function for the items collection
-    getComponentId : function(comp){
-        return comp.getItemId();
-    },
-
-    
/**
-     * 
Adds {@link Ext.Component Component}(s) to this Container.

-     * 
Description :
-     * 
    
-     * 
  • Fires the {@link #beforeadd} event before adding
    • 
-     * 
  • The Container's {@link #defaults default config values} will be applied
-     * accordingly (see {@link #defaults} for details).
    • 
-     * 
  • Fires the {@link #add} event after the component has been added.
    • 
-     * 

-     * 
Notes :
-     * 
    
-     * 
  • If the Container is already rendered when add
-     * is called, you may need to call {@link #doLayout} to refresh the view which causes
-     * any unrendered child Components to be rendered. This is required so that you can
-     * add multiple child components if needed while only refreshing the layout
-     * once. For example:
    
-var tb = new {@link Ext.Toolbar}();
-tb.render(document.body);  // toolbar is rendered
-tb.add({text:'Button 1'}); // add multiple items ({@link #defaultType} for {@link Ext.Toolbar Toolbar} is 'button')
-tb.add({text:'Button 2'});
-tb.{@link #doLayout}();             // refresh the layout
-     * 
    • 
-     * 
  • Warning: Containers directly managed by the BorderLayout layout manager
-     * may not be removed or added.  See the Notes for {@link Ext.layout.BorderLayout BorderLayout}
-     * for more details.
    • 
-     * 

-     * @param {Object/Array} component
-     * 
Either a single component or an Array of components to add.  See
-     * {@link #items} for additional information.

-     * @param {Object} (Optional) component_2
-     * @param {Object} (Optional) component_n
-     * @return {Ext.Component} component The Component (or config object) that was added.
-     */
-    add : function(comp){
-        this.initItems();
-        var args = arguments.length > 1;
-        if(args || Ext.isArray(comp)){
-            Ext.each(args ? arguments : comp, function(c){
-                this.add(c);
-            }, this);
-            return;
-        }
-        var c = this.lookupComponent(this.applyDefaults(comp));
-        var pos = this.items.length;
-        if(this.fireEvent('beforeadd', this, c, pos) !== false && this.onBeforeAdd(c) !== false){
-            this.items.add(c);
-            c.ownerCt = this;
-            this.onAdd(c);
-            this.fireEvent('add', this, c, pos);
-        }
-        return c;
-    },
-
-    onAdd : function(c){
-        // Empty template method
-    },
-
-    
/**
-     * Inserts a Component into this Container at a specified index. Fires the
-     * {@link #beforeadd} event before inserting, then fires the {@link #add} event after the
-     * Component has been inserted.
-     * @param {Number} index The index at which the Component will be inserted
-     * into the Container's items collection
-     * @param {Ext.Component} component The child Component to insert.


-     * Ext uses lazy rendering, and will only render the inserted Component should
-     * it become necessary.


-     * A Component config object may be passed in order to avoid the overhead of
-     * constructing a real Component object if lazy rendering might mean that the
-     * inserted Component will not be rendered immediately. To take advantage of
-     * this 'lazy instantiation', set the {@link Ext.Component#xtype} config
-     * property to the registered type of the Component wanted.


-     * For a list of all available xtypes, see {@link Ext.Component}.
-     * @return {Ext.Component} component The Component (or config object) that was
-     * inserted with the Container's default config values applied.
-     */
-    insert : function(index, comp){
-        this.initItems();
-        var a = arguments, len = a.length;
-        if(len > 2){
-            for(var i = len-1; i >= 1; --i) {
-                this.insert(index, a[i]);
-            }
-            return;
-        }
-        var c = this.lookupComponent(this.applyDefaults(comp));
-        index = Math.min(index, this.items.length);
-        if(this.fireEvent('beforeadd', this, c, index) !== false && this.onBeforeAdd(c) !== false){
-            if(c.ownerCt == this){
-                this.items.remove(c);
-            }
-            this.items.insert(index, c);
-            c.ownerCt = this;
-            this.onAdd(c);
-            this.fireEvent('add', this, c, index);
-        }
-        return c;
-    },
-
-    // private
-    applyDefaults : function(c){
-        if(this.defaults){
-            if(Ext.isString(c)){
-                c = Ext.ComponentMgr.get(c);
-                Ext.apply(c, this.defaults);
-            }else if(!c.events){
-                Ext.applyIf(c, this.defaults);
-            }else{
-                Ext.apply(c, this.defaults);
-            }
-        }
-        return c;
-    },
-
-    // private
-    onBeforeAdd : function(item){
-        if(item.ownerCt){
-            item.ownerCt.remove(item, false);
-        }
-        if(this.hideBorders === true){
-            item.border = (item.border === true);
-        }
-    },
-
-    
/**
-     * Removes a component from this container.  Fires the {@link #beforeremove} event before removing, then fires
-     * the {@link #remove} event after the component has been removed.
-     * @param {Component/String} component The component reference or id to remove.
-     * @param {Boolean} autoDestroy (optional) True to automatically invoke the removed Component's {@link Ext.Component#destroy} function.
-     * Defaults to the value of this Container's {@link #autoDestroy} config.
-     * @return {Ext.Component} component The Component that was removed.
-     */
-    remove : function(comp, autoDestroy){
-        this.initItems();
-        var c = this.getComponent(comp);
-        if(c && this.fireEvent('beforeremove', this, c) !== false){
-            delete c.ownerCt;
-            if(this.layout && this.rendered){
-                this.layout.onRemove(c);
-            }
-            this.onRemove(c);
-            this.items.remove(c);
-            if(autoDestroy === true || (autoDestroy !== false && this.autoDestroy)){
-                c.destroy();
-            }
-            this.fireEvent('remove', this, c);
-        }
-        return c;
-    },
-
-    onRemove: function(c){
-        // Empty template method
-    },
-
-    
/**
-     * Removes all components from this container.
-     * @param {Boolean} autoDestroy (optional) True to automatically invoke the removed Component's {@link Ext.Component#destroy} function.
-     * Defaults to the value of this Container's {@link #autoDestroy} config.
-     * @return {Array} Array of the destroyed components
-     */
-    removeAll: function(autoDestroy){
-        this.initItems();
-        var item, rem = [], items = [];
-        this.items.each(function(i){
-            rem.push(i);
-        });
-        for (var i = 0, len = rem.length; i < len; ++i){
-            item = rem[i];
-            this.remove(item, autoDestroy);
-            if(item.ownerCt !== this){
-                items.push(item);
-            }
-        }
-        return items;
-    },
-
-    
/**
-     * Examines this container's {@link #items} property
-     * and gets a direct child component of this container.
-     * @param {String/Number} comp This parameter may be any of the following:
-     * 
    
-     * 
  • a String : representing the {@link Ext.Component#itemId itemId}
-     * or {@link Ext.Component#id id} of the child component 
    • 
-     * 
  • a Number : representing the position of the child component
-     * within the {@link #items} property
    • 
-     * 

-     * 
For additional information see {@link Ext.util.MixedCollection#get}.
-     * @return Ext.Component The component (if found).
-     */
-    getComponent : function(comp){
-        if(Ext.isObject(comp)){
-            comp = comp.getItemId();
-        }
-        return this.items.get(comp);
-    },
-
-    // private
-    lookupComponent : function(comp){
-        if(Ext.isString(comp)){
-            return Ext.ComponentMgr.get(comp);
-        }else if(!comp.events){
-            return this.createComponent(comp);
-        }
-        return comp;
-    },
-
-    // private
-    createComponent : function(config){
-        return Ext.create(config, this.defaultType);
-    },
-
-    // private
-    canLayout: function() {
-        var el = this.getVisibilityEl();
-        return el && !el.isStyle("display", "none");
-    },
-
-
-    
/**
-     * Force this container's layout to be recalculated. A call to this function is required after adding a new component
-     * to an already rendered container, or possibly after changing sizing/position properties of child components.
-     * @param {Boolean} shallow (optional) True to only calc the layout of this component, and let child components auto
-     * calc layouts as required (defaults to false, which calls doLayout recursively for each subcontainer)
-     * @param {Boolean} force (optional) True to force a layout to occur, even if the item is hidden.
-     * @return {Ext.Container} this
-     */
-    doLayout: function(shallow, force){
-        var rendered = this.rendered;
-        forceLayout = force || this.forceLayout;
-
-        if(!this.canLayout() || this.collapsed){
-            this.deferLayout = this.deferLayout || !shallow;
-            if(!forceLayout){
-                return;
-            }
-            shallow = shallow && !this.deferLayout;
-        } else {
-            delete this.deferLayout;
-        }
-        if(rendered && this.layout){
-            this.layout.layout();
-        }
-        if(shallow !== true && this.items){
-            var cs = this.items.items;
-            for(var i = 0, len = cs.length; i < len; i++){
-                var c = cs[i];
-                if(c.doLayout){
-                    c.doLayout(false, forceLayout);
-                }
-            }
-        }
-        if(rendered){
-            this.onLayout(shallow, forceLayout);
-        }
-        // Initial layout completed
-        this.hasLayout = true;
-        delete this.forceLayout;
-    },
-
-    //private
-    onLayout : Ext.emptyFn,
-
-    // private
-    shouldBufferLayout: function(){
-        /*
-         * Returns true if the container should buffer a layout.
-         * This is true only if the container has previously been laid out
-         * and has a parent container that is pending a layout.
-         */
-        var hl = this.hasLayout;
-        if(this.ownerCt){
-            // Only ever buffer if we've laid out the first time and we have one pending.
-            return hl ? !this.hasLayoutPending() : false;
-        }
-        // Never buffer initial layout
-        return hl;
-    },
-
-    // private
-    hasLayoutPending: function(){
-        // Traverse hierarchy to see if any parent container has a pending layout.
-        var pending = false;
-        this.ownerCt.bubble(function(c){
-            if(c.layoutPending){
-                pending = true;
-                return false;
-            }
-        });
-        return pending;
-    },
-
-    onShow : function(){
-        Ext.Container.superclass.onShow.call(this);
-        if(this.deferLayout !== undefined){
-            this.doLayout(true);
-        }
-    },
-
-    
/**
-     * Returns the layout currently in use by the container.  If the container does not currently have a layout
-     * set, a default {@link Ext.layout.ContainerLayout} will be created and set as the container's layout.
-     * @return {ContainerLayout} layout The container's layout
-     */
-    getLayout : function(){
-        if(!this.layout){
-            var layout = new Ext.layout.ContainerLayout(this.layoutConfig);
-            this.setLayout(layout);
-        }
-        return this.layout;
-    },
-
-    // private
-    beforeDestroy : function(){
-        if(this.items){
-            Ext.destroy.apply(Ext, this.items.items);
-        }
-        if(this.monitorResize){
-            Ext.EventManager.removeResizeListener(this.doLayout, this);
-        }
-        Ext.destroy(this.layout);
-        Ext.Container.superclass.beforeDestroy.call(this);
-    },
-
-    
/**
-     * Bubbles up the component/container heirarchy, calling the specified function with each component. The scope (this) of
-     * function call will be the scope provided or the current component. The arguments to the function
-     * will be the args provided or the current component. If the function returns false at any point,
-     * the bubble is stopped.
-     * @param {Function} fn The function to call
-     * @param {Object} scope (optional) The scope of the function (defaults to current node)
-     * @param {Array} args (optional) The args to call the function with (default to passing the current component)
-     * @return {Ext.Container} this
-     */
-    bubble : function(fn, scope, args){
-        var p = this;
-        while(p){
-            if(fn.apply(scope || p, args || [p]) === false){
-                break;
-            }
-            p = p.ownerCt;
-        }
-        return this;
-    },
-
-    
/**
-     * Cascades down the component/container heirarchy from this component (called first), calling the specified function with
-     * each component. The scope (this) of
-     * function call will be the scope provided or the current component. The arguments to the function
-     * will be the args provided or the current component. If the function returns false at any point,
-     * the cascade is stopped on that branch.
-     * @param {Function} fn The function to call
-     * @param {Object} scope (optional) The scope of the function (defaults to current component)
-     * @param {Array} args (optional) The args to call the function with (defaults to passing the current component)
-     * @return {Ext.Container} this
-     */
-    cascade : function(fn, scope, args){
-        if(fn.apply(scope || this, args || [this]) !== false){
-            if(this.items){
-                var cs = this.items.items;
-                for(var i = 0, len = cs.length; i < len; i++){
-                    if(cs[i].cascade){
-                        cs[i].cascade(fn, scope, args);
-                    }else{
-                        fn.apply(scope || cs[i], args || [cs[i]]);
-                    }
-                }
-            }
-        }
-        return this;
-    },
-
-    
/**
-     * Find a component under this container at any level by id
-     * @param {String} id
-     * @return Ext.Component
-     */
-    findById : function(id){
-        var m, ct = this;
-        this.cascade(function(c){
-            if(ct != c && c.id === id){
-                m = c;
-                return false;
-            }
-        });
-        return m || null;
-    },
-
-    
/**
-     * Find a component under this container at any level by xtype or class
-     * @param {String/Class} xtype The xtype string for a component, or the class of the component directly
-     * @param {Boolean} shallow (optional) False to check whether this Component is descended from the xtype (this is
-     * the default), or true to check whether this Component is directly of the specified xtype.
-     * @return {Array} Array of Ext.Components
-     */
-    findByType : function(xtype, shallow){
-        return this.findBy(function(c){
-            return c.isXType(xtype, shallow);
-        });
-    },
-
-    
/**
-     * Find a component under this container at any level by property
-     * @param {String} prop
-     * @param {String} value
-     * @return {Array} Array of Ext.Components
-     */
-    find : function(prop, value){
-        return this.findBy(function(c){
-            return c[prop] === value;
-        });
-    },
-
-    
/**
-     * Find a component under this container at any level by a custom function. If the passed function returns
-     * true, the component will be included in the results. The passed function is called with the arguments (component, this container).
-     * @param {Function} fn The function to call
-     * @param {Object} scope (optional)
-     * @return {Array} Array of Ext.Components
-     */
-    findBy : function(fn, scope){
-        var m = [], ct = this;
-        this.cascade(function(c){
-            if(ct != c && fn.call(scope || c, c, ct) === true){
-                m.push(c);
-            }
-        });
-        return m;
-    },
-
-    
/**
-     * Get a component contained by this container (alias for items.get(key))
-     * @param {String/Number} key The index or id of the component
-     * @return {Ext.Component} Ext.Component
-     */
-    get : function(key){
-        return this.items.get(key);
-    }
-});
-
-Ext.Container.LAYOUTS = {};
-Ext.reg('container', Ext.Container);
-

-
+Ext.Container = Ext.extend(Ext.BoxComponent, {
+    
/**
+     * @cfg {Boolean} monitorResize
+     * True to automatically monitor window resize events to handle anything that is sensitive to the current size
+     * of the viewport.  This value is typically managed by the chosen {@link #layout} and should not need
+     * to be set manually.
+     */
+    
/**
+     * @cfg {String/Object} layout
+     * 
*Important: In order for child items to be correctly sized and
+     * positioned, typically a layout manager must be specified through
+     * the layout configuration option.

+     * 
The sizing and positioning of child {@link items} is the responsibility of
+     * the Container's layout manager which creates and manages the type of layout
+     * you have in mind.  For example:

+new Ext.Window({
+    width:300, height: 300,
+    layout: 'fit', // explicitly set layout manager: override the default (layout:'auto')
+    items: [{
+        title: 'Panel inside a Window'
+    }]
+}).show();
+     * 

+     * 
If the {@link #layout} configuration is not explicitly specified for
+     * a general purpose container (e.g. Container or Panel) the
+     * {@link Ext.layout.ContainerLayout default layout manager} will be used
+     * which does nothing but render child components sequentially into the
+     * Container (no sizing or positioning will be performed in this situation).
+     * Some container classes implicitly specify a default layout
+     * (e.g. FormPanel specifies layout:'form'). Other specific
+     * purpose classes internally specify/manage their internal layout (e.g.
+     * GridPanel, TabPanel, TreePanel, Toolbar, Menu, etc.).

+     * 
layout may be specified as either as an Object or
+     * as a String:

+     */
+    
/**
+     * @cfg {Object} layoutConfig
+     * This is a config object containing properties specific to the chosen
+     * {@link #layout} if {@link #layout}
+     * has been specified as a string.

+     */
+    
/**
+     * @cfg {Boolean/Number} bufferResize
+     * When set to true (50 milliseconds) or a number of milliseconds, the layout assigned for this container will buffer
+     * the frequency it calculates and does a re-layout of components. This is useful for heavy containers or containers
+     * with a large quantity of sub-components for which frequent layout calls would be expensive. Defaults to 50.
+     */
+    bufferResize: 50,
+
+    
/**
+     * @cfg {String/Number} activeItem
+     * A string component id or the numeric index of the component that should be initially activated within the
+     * container's layout on render.  For example, activeItem: 'item-1' or activeItem: 0 (index 0 = the first
+     * item in the container's collection).  activeItem only applies to layout styles that can display
+     * items one at a time (like {@link Ext.layout.AccordionLayout}, {@link Ext.layout.CardLayout} and
+     * {@link Ext.layout.FitLayout}).  Related to {@link Ext.layout.ContainerLayout#activeItem}.
+     */
+    
/**
+     * @cfg {Object/Array} items
+     * 
** IMPORTANT: be sure to {@link #layout specify a layout} if needed ! **

+     * 
A single item, or an array of child Components to be added to this container,
+     * for example:

+     * 

+// specifying a single item
+items: {...},
+layout: 'fit',    // specify a layout!
+
+// specifying multiple items
+items: [{...}, {...}],
+layout: 'anchor', // specify a layout!
+     * 

+     * 
Each item may be:

+     * 

+     * 
Notes:

+     * 

+     */
+    
/**
+     * @cfg {Object|Function} defaults
+     * 
This option is a means of applying default settings to all added items whether added through the {@link #items}
+     * config or via the {@link #add} or {@link #insert} methods.

+     * 
If an added item is a config object, and not an instantiated Component, then the default properties are
+     * unconditionally applied. If the added item is an instantiated Component, then the default properties are
+     * applied conditionally so as not to override existing properties in the item.

+     * 
If the defaults option is specified as a function, then the function will be called using this Container as the
+     * scope (this reference) and passing the added item as the first parameter. Any resulting object
+     * from that call is then applied to the item as default properties.

+     * 
For example, to automatically apply padding to the body of each of a set of
+     * contained {@link Ext.Panel} items, you could pass: defaults: {bodyStyle:'padding:15px'}.

+     * 
Usage:

+defaults: {               // defaults are applied to items, not the container
+    autoScroll:true
+},
+items: [
+    {
+        xtype: 'panel',   // defaults do not have precedence over
+        id: 'panel1',     // options in config objects, so the defaults
+        autoScroll: false // will not be applied here, panel1 will be autoScroll:false
+    },
+    new Ext.Panel({       // defaults do have precedence over options
+        id: 'panel2',     // options in components, so the defaults
+        autoScroll: false // will be applied here, panel2 will be autoScroll:true.
+    })
+]
+     * 

+     */
+
+
+    
/** @cfg {Boolean} autoDestroy
+     * If true the container will automatically destroy any contained component that is removed from it, else
+     * destruction must be handled manually (defaults to true).
+     */
+    autoDestroy : true,
+
+    
/** @cfg {Boolean} forceLayout
+     * If true the container will force a layout initially even if hidden or collapsed. This option
+     * is useful for forcing forms to render in collapsed or hidden containers. (defaults to false).
+     */
+    forceLayout: false,
+
+    
/** @cfg {Boolean} hideBorders
+     * True to hide the borders of each contained component, false to defer to the component's existing
+     * border settings (defaults to false).
+     */
+    
/** @cfg {String} defaultType
+     * 
The default {@link Ext.Component xtype} of child Components to create in this Container when
+     * a child item is specified as a raw configuration object, rather than as an instantiated Component.

+     * 
Defaults to 'panel', except {@link Ext.menu.Menu} which defaults to 'menuitem',
+     * and {@link Ext.Toolbar} and {@link Ext.ButtonGroup} which default to 'button'.

+     */
+    defaultType : 'panel',
+
+    
/** @cfg {String} resizeEvent
+     * The event to listen to for resizing in layouts. Defaults to 'resize'.
+     */
+    resizeEvent: 'resize',
+
+    
/**
+     * @cfg {Array} bubbleEvents
+     * 
An array of events that, when fired, should be bubbled to any parent container.
+     * See {@link Ext.util.Observable#enableBubble}.
+     * Defaults to ['add', 'remove'].
+     */
+    bubbleEvents: ['add', 'remove'],
+
+    // private
+    initComponent : function(){
+        Ext.Container.superclass.initComponent.call(this);
+
+        this.addEvents(
+            
/**
+             * @event afterlayout
+             * Fires when the components in this container are arranged by the associated layout manager.
+             * @param {Ext.Container} this
+             * @param {ContainerLayout} layout The ContainerLayout implementation for this container
+             */
+            'afterlayout',
+            
/**
+             * @event beforeadd
+             * Fires before any {@link Ext.Component} is added or inserted into the container.
+             * A handler can return false to cancel the add.
+             * @param {Ext.Container} this
+             * @param {Ext.Component} component The component being added
+             * @param {Number} index The index at which the component will be added to the container's items collection
+             */
+            'beforeadd',
+            
/**
+             * @event beforeremove
+             * Fires before any {@link Ext.Component} is removed from the container.  A handler can return
+             * false to cancel the remove.
+             * @param {Ext.Container} this
+             * @param {Ext.Component} component The component being removed
+             */
+            'beforeremove',
+            
/**
+             * @event add
+             * @bubbles
+             * Fires after any {@link Ext.Component} is added or inserted into the container.
+             * @param {Ext.Container} this
+             * @param {Ext.Component} component The component that was added
+             * @param {Number} index The index at which the component was added to the container's items collection
+             */
+            'add',
+            
/**
+             * @event remove
+             * @bubbles
+             * Fires after any {@link Ext.Component} is removed from the container.
+             * @param {Ext.Container} this
+             * @param {Ext.Component} component The component that was removed
+             */
+            'remove'
+        );
+
+        this.enableBubble(this.bubbleEvents);
+
+        
/**
+         * The collection of components in this container as a {@link Ext.util.MixedCollection}
+         * @type MixedCollection
+         * @property items
+         */
+        var items = this.items;
+        if(items){
+            delete this.items;
+            this.add(items);
+        }
+    },
+
+    // private
+    initItems : function(){
+        if(!this.items){
+            this.items = new Ext.util.MixedCollection(false, this.getComponentId);
+            this.getLayout(); // initialize the layout
+        }
+    },
+
+    // private
+    setLayout : function(layout){
+        if(this.layout && this.layout != layout){
+            this.layout.setContainer(null);
+        }
+        this.initItems();
+        this.layout = layout;
+        layout.setContainer(this);
+    },
+
+    afterRender: function(){
+        this.layoutDone = false;
+        if(!this.layout){
+            this.layout = 'auto';
+        }
+        if(Ext.isObject(this.layout) && !this.layout.layout){
+            this.layoutConfig = this.layout;
+            this.layout = this.layoutConfig.type;
+        }
+        if(Ext.isString(this.layout)){
+            this.layout = new Ext.Container.LAYOUTS[this.layout.toLowerCase()](this.layoutConfig);
+        }
+        this.setLayout(this.layout);
+
+        // BoxComponent's afterRender will set the size.
+        // This will will trigger a layout if the layout is configured to monitor resize
+        Ext.Container.superclass.afterRender.call(this);
+
+        if(Ext.isDefined(this.activeItem)){
+            var item = this.activeItem;
+            delete this.activeItem;
+            this.layout.setActiveItem(item);
+        }
+
+        // If we have no ownerCt and the BoxComponent's sizing did not trigger a layout, force a layout
+        if(!this.ownerCt && !this.layoutDone){
+            this.doLayout(false, true);
+        }
+
+        if(this.monitorResize === true){
+            Ext.EventManager.onWindowResize(this.doLayout, this, [false]);
+        }
+    },
+
+    
/**
+     * 
Returns the Element to be used to contain the child Components of this Container.

+     * 
An implementation is provided which returns the Container's {@link #getEl Element}, but
+     * if there is a more complex structure to a Container, this may be overridden to return
+     * the element into which the {@link #layout layout} renders child Components.

+     * @return {Ext.Element} The Element to render child Components into.
+     */
+    getLayoutTarget : function(){
+        return this.el;
+    },
+
+    // private - used as the key lookup function for the items collection
+    getComponentId : function(comp){
+        return comp.getItemId();
+    },
+
+    
/**
+     * 
Adds {@link Ext.Component Component}(s) to this Container.

+     * 
Description :
+     * 

+     * 
Notes :
+     * 

+     * @param {Object/Array} component
+     * 
Either a single component or an Array of components to add.  See
+     * {@link #items} for additional information.

+     * @param {Object} (Optional) component_2
+     * @param {Object} (Optional) component_n
+     * @return {Ext.Component} component The Component (or config object) that was added.
+     */
+    add : function(comp){
+        this.initItems();
+        var args = arguments.length > 1;
+        if(args || Ext.isArray(comp)){
+            var result = [];
+            Ext.each(args ? arguments : comp, function(c){
+                result.push(this.add(c));
+            }, this);
+            return result;
+        }
+        var c = this.lookupComponent(this.applyDefaults(comp));
+        var index = this.items.length;
+        if(this.fireEvent('beforeadd', this, c, index) !== false && this.onBeforeAdd(c) !== false){
+            this.items.add(c);
+            // *onAdded
+            c.onAdded(this, index);
+            this.onAdd(c);
+            this.fireEvent('add', this, c, index);
+        }
+        return c;
+    },
+
+    onAdd : function(c){
+        // Empty template method
+    },
+    
+    // private
+    onAdded : function(container, pos) {
+        //overridden here so we can cascade down, not worth creating a template method.
+        this.ownerCt = container;
+        this.initRef();
+        //initialize references for child items
+        this.cascade(function(c){
+            c.initRef();
+        });
+        this.fireEvent('added', this, container, pos);
+    },
+
+    
/**
+     * Inserts a Component into this Container at a specified index. Fires the
+     * {@link #beforeadd} event before inserting, then fires the {@link #add} event after the
+     * Component has been inserted.
+     * @param {Number} index The index at which the Component will be inserted
+     * into the Container's items collection
+     * @param {Ext.Component} component The child Component to insert.


+     * Ext uses lazy rendering, and will only render the inserted Component should
+     * it become necessary.


+     * A Component config object may be passed in order to avoid the overhead of
+     * constructing a real Component object if lazy rendering might mean that the
+     * inserted Component will not be rendered immediately. To take advantage of
+     * this 'lazy instantiation', set the {@link Ext.Component#xtype} config
+     * property to the registered type of the Component wanted.


+     * For a list of all available xtypes, see {@link Ext.Component}.
+     * @return {Ext.Component} component The Component (or config object) that was
+     * inserted with the Container's default config values applied.
+     */
+    insert : function(index, comp){
+        this.initItems();
+        var a = arguments, len = a.length;
+        if(len > 2){
+            var result = [];
+            for(var i = len-1; i >= 1; --i) {
+                result.push(this.insert(index, a[i]));
+            }
+            return result;
+        }
+        var c = this.lookupComponent(this.applyDefaults(comp));
+        index = Math.min(index, this.items.length);
+        if(this.fireEvent('beforeadd', this, c, index) !== false && this.onBeforeAdd(c) !== false){
+            if(c.ownerCt == this){
+                this.items.remove(c);
+            }
+            this.items.insert(index, c);
+            c.onAdded(this, index);
+            this.onAdd(c);
+            this.fireEvent('add', this, c, index);
+        }
+        return c;
+    },
+
+    // private
+    applyDefaults : function(c){
+        var d = this.defaults;
+        if(d){
+            if(Ext.isFunction(d)){
+                d = d.call(this, c);
+            }
+            if(Ext.isString(c)){
+                c = Ext.ComponentMgr.get(c);
+                Ext.apply(c, d);
+            }else if(!c.events){
+                Ext.applyIf(c, d);
+            }else{
+                Ext.apply(c, d);
+            }
+        }
+        return c;
+    },
+
+    // private
+    onBeforeAdd : function(item){
+        if(item.ownerCt){
+            item.ownerCt.remove(item, false);
+        }
+        if(this.hideBorders === true){
+            item.border = (item.border === true);
+        }
+    },
+
+    
/**
+     * Removes a component from this container.  Fires the {@link #beforeremove} event before removing, then fires
+     * the {@link #remove} event after the component has been removed.
+     * @param {Component/String} component The component reference or id to remove.
+     * @param {Boolean} autoDestroy (optional) True to automatically invoke the removed Component's {@link Ext.Component#destroy} function.
+     * Defaults to the value of this Container's {@link #autoDestroy} config.
+     * @return {Ext.Component} component The Component that was removed.
+     */
+    remove : function(comp, autoDestroy){
+        this.initItems();
+        var c = this.getComponent(comp);
+        if(c && this.fireEvent('beforeremove', this, c) !== false){
+            this.doRemove(c, autoDestroy);
+            this.fireEvent('remove', this, c);
+        }
+        return c;
+    },
+
+    onRemove: function(c){
+        // Empty template method
+    },
+
+    // private
+    doRemove: function(c, autoDestroy){
+        if(this.layout && this.rendered){
+            this.layout.onRemove(c);
+        }
+        this.items.remove(c);
+        c.onRemoved();
+        this.onRemove(c);
+        if(autoDestroy === true || (autoDestroy !== false && this.autoDestroy)){
+            c.destroy();
+        }
+    },
+
+    
/**
+     * Removes all components from this container.
+     * @param {Boolean} autoDestroy (optional) True to automatically invoke the removed Component's {@link Ext.Component#destroy} function.
+     * Defaults to the value of this Container's {@link #autoDestroy} config.
+     * @return {Array} Array of the destroyed components
+     */
+    removeAll: function(autoDestroy){
+        this.initItems();
+        var item, rem = [], items = [];
+        this.items.each(function(i){
+            rem.push(i);
+        });
+        for (var i = 0, len = rem.length; i < len; ++i){
+            item = rem[i];
+            this.remove(item, autoDestroy);
+            if(item.ownerCt !== this){
+                items.push(item);
+            }
+        }
+        return items;
+    },
+
+    
/**
+     * Examines this container's {@link #items} property
+     * and gets a direct child component of this container.
+     * @param {String/Number} comp This parameter may be any of the following:
+     * 

+     * 
For additional information see {@link Ext.util.MixedCollection#get}.
+     * @return Ext.Component The component (if found).
+     */
+    getComponent : function(comp){
+        if(Ext.isObject(comp)){
+            comp = comp.getItemId();
+        }
+        return this.items.get(comp);
+    },
+
+    // private
+    lookupComponent : function(comp){
+        if(Ext.isString(comp)){
+            return Ext.ComponentMgr.get(comp);
+        }else if(!comp.events){
+            return this.createComponent(comp);
+        }
+        return comp;
+    },
+
+    // private
+    createComponent : function(config, defaultType){
+        // add in ownerCt at creation time but then immediately
+        // remove so that onBeforeAdd can handle it
+        var c = config.render ? config : Ext.create(Ext.apply({
+            ownerCt: this
+        }, config), defaultType || this.defaultType);
+        delete c.ownerCt;
+        return c;
+    },
+
+    
/**
+    * We can only lay out if there is a view area in which to layout.
+    * display:none on the layout target, *or any of its parent elements* will mean it has no view area.
+    */
+    canLayout: function() {
+        var el = this.getLayoutTarget(), vs;
+        return !!(el && (vs = el.dom.offsetWidth || el.dom.offsetHeight));
+    },
+
+    
/**
+     * Force this container's layout to be recalculated. A call to this function is required after adding a new component
+     * to an already rendered container, or possibly after changing sizing/position properties of child components.
+     * @param {Boolean} shallow (optional) True to only calc the layout of this component, and let child components auto
+     * calc layouts as required (defaults to false, which calls doLayout recursively for each subcontainer)
+     * @param {Boolean} force (optional) True to force a layout to occur, even if the item is hidden.
+     * @return {Ext.Container} this
+     */
+    doLayout: function(shallow, force){
+        var rendered = this.rendered,
+            forceLayout = force || this.forceLayout,
+            cs, i, len, c;
+
+        this.layoutDone = true;
+        if(!this.canLayout() || this.collapsed){
+            this.deferLayout = this.deferLayout || !shallow;
+            if(!forceLayout){
+                return;
+            }
+            shallow = shallow && !this.deferLayout;
+        } else {
+            delete this.deferLayout;
+        }
+
+        cs = (shallow !== true && this.items) ? this.items.items : [];
+
+//      Inhibit child Containers from relaying on resize since we are about to to explicitly call doLayout on them all!
+        for(i = 0, len = cs.length; i < len; i++){
+            if ((c = cs[i]).layout) {
+                c.suspendLayoutResize = true;
+            }
+        }
+
+//      Tell the layout manager to ensure all child items are rendered, and sized according to their rules.
+//      Will not cause the child items to relayout.
+        if(rendered && this.layout){
+            this.layout.layout();
+        }
+
+//      Explicitly lay out all child items
+        for(i = 0; i < len; i++){
+            if((c = cs[i]).doLayout){
+                c.doLayout(false, forceLayout);
+            }
+        }
+        if(rendered){
+            this.onLayout(shallow, forceLayout);
+        }
+        // Initial layout completed
+        this.hasLayout = true;
+        delete this.forceLayout;
+
+//      Re-enable child layouts relaying on resize.
+        for(i = 0; i < len; i++){
+            if ((c = cs[i]).layout) {
+                delete c.suspendLayoutResize;
+            }
+        }
+    },
+
+    //private
+    onLayout : Ext.emptyFn,
+
+    onResize: function(adjWidth, adjHeight, rawWidth, rawHeight){
+        Ext.Container.superclass.onResize.apply(this, arguments);
+        if ((this.rendered && this.layout && this.layout.monitorResize) && !this.suspendLayoutResize) {
+            this.layout.onResize();
+        }
+    },
+
+    // private
+    hasLayoutPending: function(){
+        // Traverse hierarchy to see if any parent container has a pending layout.
+        var pending = this.layoutPending;
+        this.ownerCt.bubble(function(c){
+            return !(pending = c.layoutPending);
+        });
+        return pending;
+
+    },
+
+    onShow : function(){
+        Ext.Container.superclass.onShow.call(this);
+        if(Ext.isDefined(this.deferLayout)){
+            this.doLayout(true);
+        }
+    },
+
+    
/**
+     * Returns the layout currently in use by the container.  If the container does not currently have a layout
+     * set, a default {@link Ext.layout.ContainerLayout} will be created and set as the container's layout.
+     * @return {ContainerLayout} layout The container's layout
+     */
+    getLayout : function(){
+        if(!this.layout){
+            var layout = new Ext.layout.ContainerLayout(this.layoutConfig);
+            this.setLayout(layout);
+        }
+        return this.layout;
+    },
+
+    // private
+    beforeDestroy : function(){
+        var c;
+        if(this.items){
+            while(c = this.items.first()){
+                this.doRemove(c, true);
+            }
+        }
+        if(this.monitorResize){
+            Ext.EventManager.removeResizeListener(this.doLayout, this);
+        }
+        Ext.destroy(this.layout);
+        Ext.Container.superclass.beforeDestroy.call(this);
+    },
+
+    
/**
+     * Bubbles up the component/container heirarchy, calling the specified function with each component. The scope (this) of
+     * function call will be the scope provided or the current component. The arguments to the function
+     * will be the args provided or the current component. If the function returns false at any point,
+     * the bubble is stopped.
+     * @param {Function} fn The function to call
+     * @param {Object} scope (optional) The scope of the function (defaults to current node)
+     * @param {Array} args (optional) The args to call the function with (default to passing the current component)
+     * @return {Ext.Container} this
+     */
+    bubble : function(fn, scope, args){
+        var p = this;
+        while(p){
+            if(fn.apply(scope || p, args || [p]) === false){
+                break;
+            }
+            p = p.ownerCt;
+        }
+        return this;
+    },
+
+    
/**
+     * Cascades down the component/container heirarchy from this component (called first), calling the specified function with
+     * each component. The scope (this) of
+     * function call will be the scope provided or the current component. The arguments to the function
+     * will be the args provided or the current component. If the function returns false at any point,
+     * the cascade is stopped on that branch.
+     * @param {Function} fn The function to call
+     * @param {Object} scope (optional) The scope of the function (defaults to current component)
+     * @param {Array} args (optional) The args to call the function with (defaults to passing the current component)
+     * @return {Ext.Container} this
+     */
+    cascade : function(fn, scope, args){
+        if(fn.apply(scope || this, args || [this]) !== false){
+            if(this.items){
+                var cs = this.items.items;
+                for(var i = 0, len = cs.length; i < len; i++){
+                    if(cs[i].cascade){
+                        cs[i].cascade(fn, scope, args);
+                    }else{
+                        fn.apply(scope || cs[i], args || [cs[i]]);
+                    }
+                }
+            }
+        }
+        return this;
+    },
+
+    
/**
+     * Find a component under this container at any level by id
+     * @param {String} id
+     * @return Ext.Component
+     */
+    findById : function(id){
+        var m, ct = this;
+        this.cascade(function(c){
+            if(ct != c && c.id === id){
+                m = c;
+                return false;
+            }
+        });
+        return m || null;
+    },
+
+    
/**
+     * Find a component under this container at any level by xtype or class
+     * @param {String/Class} xtype The xtype string for a component, or the class of the component directly
+     * @param {Boolean} shallow (optional) False to check whether this Component is descended from the xtype (this is
+     * the default), or true to check whether this Component is directly of the specified xtype.
+     * @return {Array} Array of Ext.Components
+     */
+    findByType : function(xtype, shallow){
+        return this.findBy(function(c){
+            return c.isXType(xtype, shallow);
+        });
+    },
+
+    
/**
+     * Find a component under this container at any level by property
+     * @param {String} prop
+     * @param {String} value
+     * @return {Array} Array of Ext.Components
+     */
+    find : function(prop, value){
+        return this.findBy(function(c){
+            return c[prop] === value;
+        });
+    },
+
+    
/**
+     * Find a component under this container at any level by a custom function. If the passed function returns
+     * true, the component will be included in the results. The passed function is called with the arguments (component, this container).
+     * @param {Function} fn The function to call
+     * @param {Object} scope (optional)
+     * @return {Array} Array of Ext.Components
+     */
+    findBy : function(fn, scope){
+        var m = [], ct = this;
+        this.cascade(function(c){
+            if(ct != c && fn.call(scope || c, c, ct) === true){
+                m.push(c);
+            }
+        });
+        return m;
+    },
+
+    
/**
+     * Get a component contained by this container (alias for items.get(key))
+     * @param {String/Number} key The index or id of the component
+     * @return {Ext.Component} Ext.Component
+     */
+    get : function(key){
+        return this.items.get(key);
+    }
+});
+
+Ext.Container.LAYOUTS = {};
+Ext.reg('container', Ext.Container);
+
+ \ No newline at end of file