Properties Methods Events Config Options Direct Link

    Observable
      Component
        BoxComponent
          Container

# Class Ext.Container

Package: | Ext
Defined In: | Container.js
Class: | Container
Subclasses: | Panel, Viewport
Extends: | BoxComponent

Base class for any Ext.BoxComponent that can contain other components. Containers handle the basic behavior of containing items, namely adding, inserting and removing them. The specific layout logic required to visually render contained items is delegated to any one of the different layout classes available. This class is intended to be extended and should generally not need to be created directly via the new keyword.

## Config Options

Config Options | Defined By
--- | ---
| activeItem : String/Number A string component id or the numeric index of the component that should be initially activated within the container's... 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 Ext.layout.Accordion, Ext.layout.CardLayout and Ext.layout.FitLayout). Related to Ext.layout.ContainerLayout.activeItem. | Container
| allowDomMove : Boolean Whether the component can move the Dom node when rendering (defaults to true). | Component
| applyTo : Mixed The id of the node, a DOM node or an existing Element corresponding to a DIV that is already present in the document ... The id of the node, a DOM node or an existing Element corresponding to a DIV that is already present in the document that specifies some structural markup for this component. When applyTo is used, constituent parts of the component can also be specified by id or CSS class name within the main element, and the component being created may attempt to create its subcomponents from that markup if applicable. Using this config, a call to render() is not required. If applyTo is specified, any value passed for renderTo will be ignored and the target element's parent node will automatically be used as the component's container. | Component
| autoDestroy : Boolean If true the container will automatically destroy any contained component that is removed from it, else destruction mu... If true the container will automatically destroy any contained component that is removed from it, else destruction must be handled manually (defaults to true). | Container
| autoEl : String/Object A tag name or DomHelper spec to create an element with. This is intended to create shorthand utility components inlin... A tag name or DomHelper spec to create an element with. This is intended to create shorthand utility components inline via JSON. It should not be used for higher level components which already create their own elements. Example usage:
    {xtype:'box', autoEl: 'div', cls:'my-class'}
    {xtype:'box', autoEl: {tag:'blockquote', html:'autoEl is cool!'}} // with DomHelper
| Component
| autoHeight : Boolean True to use height:'auto', false to use fixed height. Note: although many components inherit this config option, not ... True to use height:'auto', false to use fixed height. Note: although many components inherit this config option, not all will function as expected with a height of 'auto'. (defaults to false). | BoxComponent
| autoShow : Boolean True if the component should check for hidden classes (e.g. 'x-hidden' or 'x-hide-display') and remove them on render... True if the component should check for hidden classes (e.g. 'x-hidden' or 'x-hide-display') and remove them on render (defaults to false). | Component
| autoWidth : Boolean True to use width:'auto', false to use fixed width. Note: although many components inherit this config option, not al... True to use width:'auto', false to use fixed width. Note: although many components inherit this config option, not all will function as expected with a width of 'auto'. (defaults to false). | BoxComponent
| bufferResize : Boolean/Number When set to true (100 milliseconds) or a number of milliseconds, the layout assigned for this container will buffer t... When set to true (100 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 amount of sub components that frequent calls to layout are expensive. | Container
| cls : String An optional extra CSS class that will be added to this component's Element (defaults to ''). This can be useful for a... An optional extra CSS class that will be added to this component's Element (defaults to ''). This can be useful for adding customized styles to the component or any of its children using standard CSS rules. | Component
| ctCls : String An optional extra CSS class that will be added to this component's container (defaults to ''). This can be useful for... An optional extra CSS class that will be added to this component's container (defaults to ''). This can be useful for adding customized styles to the container or any of its children using standard CSS rules. | Component
| defaultType : String The default type of container represented by this object as registered in Ext.ComponentMgr (defaults to 'panel'). | Container
| defaults : Object A config object that will be applied to all components added to this container either via the items config or via the... A config object that will be applied to all components added to this container either via the items config or via the add or 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 Ext.Panel items, you could pass: defaults: {bodyStyle:'padding:15px'}. | Container
| disabledClass : String CSS class added to the component when it is disabled (defaults to "x-item-disabled"). | Component
| height : Number The height of this component in pixels (defaults to auto). | BoxComponent
| hideBorders : Boolean True to hide the borders of each contained component, false to defer to the component's existing border settings (def... True to hide the borders of each contained component, false to defer to the component's existing border settings (defaults to false). | Container
| hideMode : String How this component should hidden. Supported values are "visibility" (css visibility), "offsets" (negative offset posi... How this component should hidden. Supported values are "visibility" (css visibility), "offsets" (negative offset position) and "display" (css display) - defaults to "display". | Component
| hideParent : Boolean True to hide and show the component's container when hide/show is called on the component, false to hide and show the... True to hide and show the component's container when hide/show is called on the component, false to hide and show the component itself (defaults to false). For example, this can be used as a shortcut for a hide button on a window by setting hide:true on the button when adding it to its parent container. | Component
| id : String The unique id of this component (defaults to an auto-assigned id). | Component
| items : Mixed A single item, or an array of child Components to be added to this container. Each item can be any type of object bas... A single item, or an array of child Components to be added to this container. Each item can be any type of object based on Ext.Component. Component config objects may also be specified in order to avoid the overhead of constructing a real Component object if lazy rendering might mean that the added Component will not be rendered immediately. To take advantage of this "lazy instantiation", set the Ext.Component.xtype config property to the registered type of the Component wanted. For a list of all available xtypes, see Ext.Component. If a single item is being passed, it should be passed directly as an object reference (e.g., items: {...}). Multiple items should be passed as an array of objects (e.g., items: [{...}, {...}]). | Container
| layout : String The layout type to be used in this container. If not specified, a default Ext.layout.ContainerLayout will be created ... The layout type to be used in this container. If not specified, a default Ext.layout.ContainerLayout will be created and used. Valid values are: accordion, anchor, border, card, column, fit, form and table. Specific config values for the chosen layout type can be specified using layoutConfig. | Container
| layoutConfig : Object This is a config object containing properties specific to the chosen layout (to be used in conjunction with the layou... This is a config object containing properties specific to the chosen layout (to be used in conjunction with the layout config value). For complete details regarding the valid config options for each layout type, see the layout class corresponding to the type specified: Ext.layout.Accordion Ext.layout.AnchorLayout Ext.layout.BorderLayout Ext.layout.CardLayout Ext.layout.ColumnLayout Ext.layout.FitLayout Ext.layout.FormLayout Ext.layout.TableLayout | Container
| listeners : Object A config object containing one or more event handlers to be added to this object during initialization. This should b... A config object containing one or more event handlers to be added to this object during initialization. This should be a valid listeners config object as specified in the addListener example for attaching multiple handlers at once. | Observable
| monitorResize : Boolean True to automatically monitor window resize events to handle anything that is sensitive to the current size of the vi... 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 layout and should not need to be set manually. | Container
| pageX : Number The page level x coordinate for this component if contained within a positioning container. | BoxComponent
| pageY : Number The page level y coordinate for this component if contained within a positioning container. | BoxComponent
| plugins : Object/Array An object or array of objects that will provide custom functionality for this component. The only requirement for a v... An object or array of objects that will provide custom functionality for this 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. | Component
| renderTo : Mixed The id of the node, a DOM node or an existing Element that will be the container to render this component into. Using... The id of the node, a DOM node or an existing Element that will be the container to render this component into. Using this config, a call to render() is not required. | Component
| stateEvents : Array An array of events that, when fired, should trigger this component to save its state (defaults to none). These can be... An array of events that, when fired, should trigger this component to save its state (defaults to none). These can be any types of events supported by this component, including browser or custom events (e.g., ['click', 'customerchange']). See stateful for an explanation of saving and restoring Component state. | Component
| stateId : String The unique id for this component to use for state management purposes (defaults to the component id). See stateful fo... The unique id for this component to use for state management purposes (defaults to the component id). See stateful for an explanation of saving and restoring Component state. | Component
| stateful : Boolean A flag which causes the Component to attempt to restore the state of internal properties from a saved state on startu... A flag which causes the Component to attempt to restore the state of internal properties from a saved state on startup. For state saving to work, the state manager's provider must have been set to an implementation of Ext.state.Provider which overrides the set and get methods to save and recall name/value pairs. A built-in implementation, Ext.state.CookieProvider is available. To set the state provider for the current page:
    Ext.state.Manager.setProvider(new Ext.state.CookieProvider());
Components attempt to save state when one of the events listed in the stateEvents configuration fires. You can perform extra processing on state save and restore by attaching handlers to the beforestaterestore, staterestore, beforestatesave and statesave events | Component
| style : String A custom style specification to be applied to this component's Element. Should be a valid argument to Ext.Element.app... A custom style specification to be applied to this component's Element. Should be a valid argument to Ext.Element.applyStyles. | Component
| width : Number The width of this component in pixels (defaults to auto). | BoxComponent
| x : Number The local x (left) coordinate for this component if contained within a positioning container. | BoxComponent
| xtype : String The registered xtype to create. This config option is not used when passing a config object into a constructor. This ... The registered xtype to create. This config option is not used when passing a config object into a constructor. This config option is used only when lazy instantiation is being used, and a child item of a Container is being specified not as a fully instantiated Component, but as a Component config object. The xtype will be looked up at render time up to determine what type of child Component to create. The predefined xtypes are listed here. If you subclass Components to create your own Components, you may register them using Ext.ComponentMgr.registerType in order to be able to take advantage of lazy instantiation and rendering. | Component
| y : Number The local y (top) coordinate for this component if contained within a positioning container. | BoxComponent

## Public Properties

Property | Defined By
--- | ---
| disabled : Boolean True if this component is disabled. Read-only. | Component
| hidden : Boolean True if this component is hidden. Read-only. | Component
| initialConfig : Object This Component's initial configuration specification. Read-only. | Component
| items : MixedCollection The collection of components in this container as a Ext.util.MixedCollection | Container
| ownerCt : Ext.Container The component's owner Ext.Container (defaults to undefined, and is set automatically when the component is added to a... The component's owner Ext.Container (defaults to undefined, and is set automatically when the component is added to a container). Read-only. | Component
| rendered : Boolean True if this component has been rendered. Read-only. | Component

## Public Methods

Method | Defined By
--- | ---
| add( `Ext.Component/Object component` ) : Ext.Component Adds a component to this container. Fires the beforeadd event before adding, then fires the add event after the compo... Adds a component to this container. Fires the beforeadd event before adding, then fires the add event after the component has been added. If the container is already rendered when add is called, you may need to call doLayout to refresh the view. This is required so that you can add multiple child components if needed while only refreshing the layout once. Parameters: `component` : Ext.Component/Object The component to add. Ext uses lazy rendering, and will only render the added 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 added Component will not be rendered immediately. To take advantage of this "lazy instantiation", set the Ext.Component.xtype config property to the registered type of the Component wanted. For a list of all available xtypes, see Ext.Component. Returns: `Ext.Component` component The Component (or config object) that was added with the Container's default config values applied. | Container
| addClass( `string cls` ) : void Adds a CSS class to the component's underlying element. Adds a CSS class to the component's underlying element. Parameters: `cls` : string The CSS class name to add Returns: `void` | Component
| addEvents( `Object object` ) : void Used to define events on this Observable Used to define events on this Observable Parameters: `object` : Object The object with the events defined Returns: `void` | Observable
- | addListener( `String eventName`, `Function handler`, [`Object scope`], [`Object options`] ) : void Appends an event handler to this component Appends an event handler to this component Parameters: `eventName` : String The type of event to listen for `handler` : Function The method the event invokes `scope` : Object (optional) The scope in which to execute the handler function. The handler function's "this" context. `options` : Object (optional) An object containing handler configuration properties. This may contain any of the following properties: scope : Object The scope in which to execute the handler function. The handler function's "this" context. delay : Number The number of milliseconds to delay the invocation of the handler after the event fires. single : Boolean True to add a handler to handle just the next firing of the event, and then remove itself. buffer : Number Causes the handler to be scheduled to run in an Ext.util.DelayedTask delayed by the specified number of milliseconds. If the event fires again within that time, the original handler is not invoked, but the new handler is scheduled in its place. Combining Options Using the options argument, it is possible to combine different types of listeners: A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)
      el.on('click', this.onClick, this, {
          single: true,
          delay: 100,
          forumId: 4
      });
  Attaching multiple handlers in 1 call The method also allows for a single argument to be passed which is a config object containing properties which specify multiple handlers.
      foo.on({
          'click' : {
              fn: this.onClick,
              scope: this,
              delay: 100
          },
          'mouseover' : {
              fn: this.onMouseOver,
              scope: this
          },
          'mouseout' : {
              fn: this.onMouseOut,
              scope: this
          }
      });
  Or a shorthand syntax:
      foo.on({
          'click' : this.onClick,
          'mouseover' : this.onMouseOver,
          'mouseout' : this.onMouseOut,
           scope: this
      });
Returns: `void` | Observable
| applyToMarkup( `String/HTMLElement el` ) : void Apply this component to existing markup that is valid. With this function, no call to render() is required. Apply this component to existing markup that is valid. With this function, no call to render() is required. Parameters: `el` : String/HTMLElement Returns: `void` | Component
| bubble( `Function fn`, [`Object scope`], [`Array args`] ) : void Bubbles up the component/container heirarchy, calling the specified function with each component. The scope (this) of... 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. Parameters: `fn` : Function The function to call `scope` : Object (optional) The scope of the function (defaults to current node) `args` : Array (optional) The args to call the function with (default to passing the current component) Returns: `void` | Container
| cascade( `Function fn`, [`Object scope`], [`Array args`] ) : void Cascades down the component/container heirarchy from this component (called first), calling the specified function wi... 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. Parameters: `fn` : Function The function to call `scope` : Object (optional) The scope of the function (defaults to current component) `args` : Array (optional) The args to call the function with (defaults to passing the current component) Returns: `void` | Container
| cloneConfig( `Object overrides` ) : Ext.Component Clone the current component using the original config values passed into this instance by default. Clone the current component using the original config values passed into this instance by default. Parameters: `overrides` : Object A new config containing any properties to override in the cloned version. An id property can be passed on this object, otherwise one will be generated to avoid duplicates. Returns: `Ext.Component` clone The cloned copy of this component | Component
| destroy() : void Destroys this component by purging any event listeners, removing the component's element from the DOM, removing the c... Destroys this component by purging any event listeners, removing the component's element from the DOM, removing the component from its Ext.Container (if applicable) and unregistering it from Ext.ComponentMgr. Destruction is generally handled automatically by the framework and this method should usually not need to be called directly. Parameters: None. Returns: `void` | Component
| disable() : Ext.Component Disable this component. Disable this component. Parameters: None. Returns: `Ext.Component` this | Component
| doLayout( [`Boolean shallow`] ) : void Force this container's layout to be recalculated. A call to this function is required after adding a new component to... 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. Parameters: `shallow` : Boolean (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) Returns: `void` | Container
| enable() : Ext.Component Enable this component. Enable this component. Parameters: None. Returns: `Ext.Component` this | Component
| find( `String prop`, `String value` ) : Array Find a component under this container at any level by property Find a component under this container at any level by property Parameters: `prop` : String `value` : String Returns: `Array` Array of Ext.Components | Container
| findBy( `Function fcn`, [`Object scope`] ) : Array Find a component under this container at any level by a custom function. If the passed function returns true, the com... 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). Parameters: `fcn` : Function `scope` : Object (optional) Returns: `Array` Array of Ext.Components | Container
| findById( `String id` ) : Ext.Component Find a component under this container at any level by id Find a component under this container at any level by id Parameters: `id` : String Returns: `Ext.Component` | Container
| findByType( `String/Class xtype` ) : Array Find a component under this container at any level by xtype or class Find a component under this container at any level by xtype or class Parameters: `xtype` : String/Class The xtype string for a component, or the class of the component directly Returns: `Array` Array of Ext.Components | Container
| findParentBy( `Function fcn`, [`Object scope`] ) : Array Find a container above this component at any level by a custom function. If the passed function returns true, the con... Find a container above this component at any level by a custom function. If the passed function returns true, the container will be returned. The passed function is called with the arguments (container, this component). Parameters: `fcn` : Function `scope` : Object (optional) Returns: `Array` Array of Ext.Components | Component
| findParentByType( `String/Class xtype` ) : Container Find a container above this component at any level by xtype or class Find a container above this component at any level by xtype or class Parameters: `xtype` : String/Class The xtype string for a component, or the class of the component directly Returns: `Container` The found container | Component
| fireEvent( `String eventName`, `Object... args` ) : Boolean Fires the specified event with the passed parameters (minus the event name). Fires the specified event with the passed parameters (minus the event name). Parameters: `eventName` : String `args` : Object... Variable number of parameters are passed to handlers Returns: `Boolean` returns false if any of the handlers return false otherwise it returns true | Observable
| focus( [`Boolean selectText`], [`Boolean/Number delay`] ) : Ext.Component Try to focus this component. Try to focus this component. Parameters: `selectText` : Boolean (optional) If applicable, true to also select the text in this component `delay` : Boolean/Number (optional) Delay the focus this number of milliseconds (true for 10 milliseconds) Returns: `Ext.Component` this | Component
| getBox( [`Boolean local`] ) : Object Gets the current box measurements of the component's underlying element. Gets the current box measurements of the component's underlying element. Parameters: `local` : Boolean (optional) If true the element's left and top are returned instead of page XY (defaults to false) Returns: `Object` box An object in the format {x, y, width, height} | BoxComponent
| getComponent( `String/Number id` ) : Ext.Component Gets a direct child Component by id, or by index. Gets a direct child Component by id, or by index. Parameters: `id` : String/Number or index of child Component to return. Returns: `Ext.Component` | Container
| getEl() : Ext.Element Returns the underlying Ext.Element. Returns the underlying Ext.Element. Parameters: None. Returns: `Ext.Element` The element | Component
| getId() : String Returns the id of this component. Returns the id of this component. Parameters: None. Returns: `String` | Component
| getItemId() : String Returns the item id of this component. Returns the item id of this component. Parameters: None. Returns: `String` | Component
| getLayout() : ContainerLayout Returns the layout currently in use by the container. If the container does not currently have a layout set, a defau... Returns the layout currently in use by the container. If the container does not currently have a layout set, a default Ext.layout.ContainerLayout will be created and set as the container's layout. Parameters: None. Returns: `ContainerLayout` layout The container's layout | Container
| getPosition( [`Boolean local`] ) : Array Gets the current XY position of the component's underlying element. Gets the current XY position of the component's underlying element. Parameters: `local` : Boolean (optional) If true the element's left and top are returned instead of page XY (defaults to false) Returns: `Array` The XY position of the element (e.g., [100, 200]) | BoxComponent
| getSize() : Object Gets the current size of the component's underlying element. Gets the current size of the component's underlying element. Parameters: None. Returns: `Object` An object containing the element's size {width: (element width), height: (element height)} | BoxComponent
| getXType() : String Gets the xtype for this component as registered with Ext.ComponentMgr. For a list of all available xtypes, see the Ex... Gets the xtype for this component as registered with Ext.ComponentMgr. For a list of all available xtypes, see the Ext.Component header. Example usage:
    var t = new Ext.form.TextField();
    alert(t.getXType());  // alerts 'textfield'
Parameters: None. Returns: `String` The xtype | Component
| getXTypes() : String Returns this component's xtype hierarchy as a slash-delimited string. For a list of all available xtypes, see the Ext... Returns this component's xtype hierarchy as a slash-delimited string. For a list of all available xtypes, see the Ext.Component header. Example usage:
    var t = new Ext.form.TextField();
    alert(t.getXTypes());  // alerts 'component/box/field/textfield'
Parameters: None. Returns: `String` The xtype hierarchy string | Component
| hasListener( `String eventName` ) : Boolean Checks to see if this object has any listeners for a specified event Checks to see if this object has any listeners for a specified event Parameters: `eventName` : String The name of the event to check for Returns: `Boolean` True if the event is being listened for, else false | Observable
| hide() : Ext.Component Hide this component. Hide this component. Parameters: None. Returns: `Ext.Component` this | Component
| initComponent() : void // private internal config // private internal config Parameters: None. Returns: `void` | BoxComponent
| insert( `Number index`, `Ext.Component component` ) : Ext.Component Inserts a Component into this Container at a specified index. Fires the beforeadd event before inserting, then fires ... Inserts a Component into this Container at a specified index. Fires the beforeadd event before inserting, then fires the add event after the Component has been inserted. Parameters: `index` : Number The index at which the Component will be inserted into the Container's items collection `component` : Ext.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 Ext.Component.xtype config property to the registered type of the Component wanted. For a list of all available xtypes, see Ext.Component. Returns: `Ext.Component` component The Component (or config object) that was inserted with the Container's default config values applied. | Container
| isVisible() : void Returns true if this component is visible. Returns true if this component is visible. Parameters: None. Returns: `void` | Component
| isXType( `String xtype`, [`Boolean shallow`] ) : void Tests whether or not this component is of a specific xtype. This can test whether this component is descended from th... 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). For a list of all available xtypes, see the Ext.Component header. Example usage:
    var t = new Ext.form.TextField();
    var isText = t.isXType('textfield');        // true
    var isBoxSubclass = t.isXType('box');       // true, descended from BoxComponent
    var isBoxInstance = t.isXType('box', true); // false, not a direct BoxComponent instance
Parameters: `xtype` : String The xtype to check for this component `shallow` : Boolean (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. Returns: `void` | Component
| on( `String eventName`, `Function handler`, [`Object scope`], [`Object options`] ) : void Appends an event handler to this element (shorthand for addListener) Appends an event handler to this element (shorthand for addListener) Parameters: `eventName` : String The type of event to listen for `handler` : Function The method the event invokes `scope` : Object (optional) The scope in which to execute the handler function. The handler function's "this" context. `options` : Object (optional) Returns: `void` | Observable
| purgeListeners() : void Removes all listeners for this object Removes all listeners for this object Parameters: None. Returns: `void` | Observable
| remove( `Component/String component`, [`Boolean autoDestroy`] ) : void Removes a component from this container. Fires the beforeremove event before removing, then fires the remove event a... Removes a component from this container. Fires the beforeremove event before removing, then fires the remove event after the component has been removed. Parameters: `component` : Component/String The component reference or id to remove `autoDestroy` : Boolean (optional) True to automatically invoke the component's Ext.Component.destroy function Returns: `void` | Container
| removeClass( `string cls` ) : void Removes a CSS class from the component's underlying element. Removes a CSS class from the component's underlying element. Parameters: `cls` : string The CSS class name to remove Returns: `void` | Component
| removeListener( `String eventName`, `Function handler`, [`Object scope`] ) : void Removes a listener Removes a listener Parameters: `eventName` : String The type of event to listen for `handler` : Function The handler to remove `scope` : Object (optional) The scope (this object) for the handler Returns: `void` | Observable
| render( [`Mixed container`], [`String/Number position`] ) : void If this is a lazy rendering component, render it to its container element. If this is a lazy rendering component, render it to its container element. Parameters: `container` : Mixed (optional) The element this component should be rendered into. If it is being applied to existing markup, this should be left off. `position` : String/Number (optional) The element ID or DOM node index within the container before which this component will be inserted (defaults to appending to the end of the container) Returns: `void` | Component
| resumeEvents() : void Resume firing events. (see suspendEvents) Resume firing events. (see suspendEvents) Parameters: None. Returns: `void` | Observable
| setDisabled( `Boolean disabled` ) : void Convenience function for setting disabled/enabled by boolean. Convenience function for setting disabled/enabled by boolean. Parameters: `disabled` : Boolean Returns: `void` | Component
| setHeight( `Number height` ) : Ext.BoxComponent Sets the height of the component. This method fires the resize event. Sets the height of the component. This method fires the resize event. Parameters: `height` : Number The new height to set Returns: `Ext.BoxComponent` this | BoxComponent
| setPagePosition( `Number x`, `Number y` ) : Ext.BoxComponent Sets the page XY position of the component. To set the left and top instead, use setPosition. This method fires the ... Sets the page XY position of the component. To set the left and top instead, use setPosition. This method fires the move event. Parameters: `x` : Number The new x position `y` : Number The new y position Returns: `Ext.BoxComponent` this | BoxComponent
| setPosition( `Number left`, `Number top` ) : Ext.BoxComponent Sets the left and top of the component. To set the page XY position instead, use setPagePosition. This method fires ... Sets the left and top of the component. To set the page XY position instead, use setPagePosition. This method fires the move event. Parameters: `left` : Number The new left `top` : Number The new top Returns: `Ext.BoxComponent` this | BoxComponent
| setSize( `Number/Object width`, `Number height` ) : Ext.BoxComponent Sets the width and height of the component. This method fires the resize event. This method can accept either width... Sets the width and height of the component. This method fires the resize event. This method can accept either width and height as separate numeric arguments, or you can pass a size object like {width:10, height:20}. Parameters: `width` : Number/Object The new width to set, or a size object in the format {width, height} `height` : Number The new height to set (not required if a size object is passed as the first arg) Returns: `Ext.BoxComponent` this | BoxComponent
| setVisible( `Boolean visible` ) : Ext.Component Convenience function to hide or show this component by boolean. Convenience function to hide or show this component by boolean. Parameters: `visible` : Boolean True to show, false to hide Returns: `Ext.Component` this | Component
| setWidth( `Number width` ) : Ext.BoxComponent Sets the width of the component. This method fires the resize event. Sets the width of the component. This method fires the resize event. Parameters: `width` : Number The new width to set Returns: `Ext.BoxComponent` this | BoxComponent
| show() : Ext.Component Show this component. Show this component. Parameters: None. Returns: `Ext.Component` this | Component
| suspendEvents() : void Suspend the firing of all events. (see resumeEvents) Suspend the firing of all events. (see resumeEvents) Parameters: None. Returns: `void` | Observable
| syncSize() : Ext.BoxComponent Force the component's size to recalculate based on the underlying element's current height and width. Force the component's size to recalculate based on the underlying element's current height and width. Parameters: None. Returns: `Ext.BoxComponent` this | BoxComponent
| un( `String eventName`, `Function handler`, [`Object scope`] ) : void Removes a listener (shorthand for removeListener) Removes a listener (shorthand for removeListener) Parameters: `eventName` : String The type of event to listen for `handler` : Function The handler to remove `scope` : Object (optional) The scope (this object) for the handler Returns: `void` | Observable
| updateBox( `Object box` ) : Ext.BoxComponent Sets the current box measurements of the component's underlying element. Sets the current box measurements of the component's underlying element. Parameters: `box` : Object An object in the format {x, y, width, height} Returns: `Ext.BoxComponent` this | BoxComponent

## Public Events

Event | Defined By
--- | ---
| add : ( `Ext.Container this`, `Ext.Component component`, `Number index` ) Fires after any Ext.Component is added or inserted into the container. Fires after any Ext.Component is added or inserted into the container. Listeners will be called with the following arguments: `this` : Ext.Container `component` : Ext.Component The component that was added `index` : Number The index at which the component was added to the container's items collection | Container
| afterlayout : ( `Ext.Container this`, `ContainerLayout layout` ) Fires when the components in this container are arranged by the associated layout manager. Fires when the components in this container are arranged by the associated layout manager. Listeners will be called with the following arguments: `this` : Ext.Container `layout` : ContainerLayout The ContainerLayout implementation for this container | Container
| beforeadd : ( `Ext.Container this`, `Ext.Component component`, `Number index` ) Fires before any Ext.Component is added or inserted into the container. A handler can return false to cancel the add. Fires before any Ext.Component is added or inserted into the container. A handler can return false to cancel the add. Listeners will be called with the following arguments: `this` : Ext.Container `component` : Ext.Component The component being added `index` : Number The index at which the component will be added to the container's items collection | Container
| beforedestroy : ( `Ext.Component this` ) Fires before the component is destroyed. Return false to stop the destroy. Fires before the component is destroyed. Return false to stop the destroy. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| beforehide : ( `Ext.Component this` ) Fires before the component is hidden. Return false to stop the hide. Fires before the component is hidden. Return false to stop the hide. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| beforeremove : ( `Ext.Container this`, `Ext.Component component` ) Fires before any Ext.Component is removed from the container. A handler can return false to cancel the remove. Fires before any Ext.Component is removed from the container. A handler can return false to cancel the remove. Listeners will be called with the following arguments: `this` : Ext.Container `component` : Ext.Component The component being removed | Container
| beforerender : ( `Ext.Component this` ) Fires before the component is rendered. Return false to stop the render. Fires before the component is rendered. Return false to stop the render. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| beforeshow : ( `Ext.Component this` ) Fires before the component is shown. Return false to stop the show. Fires before the component is shown. Return false to stop the show. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| beforestaterestore : ( `Ext.Component this`, `Object state` ) Fires before the state of the component is restored. Return false to stop the restore. Fires before the state of the component is restored. Return false to stop the restore. Listeners will be called with the following arguments: `this` : Ext.Component `state` : Object The hash of state values | Component
| beforestatesave : ( `Ext.Component this`, `Object state` ) Fires before the state of the component is saved to the configured state provider. Return false to stop the save. Fires before the state of the component is saved to the configured state provider. Return false to stop the save. Listeners will be called with the following arguments: `this` : Ext.Component `state` : Object The hash of state values | Component
| destroy : ( `Ext.Component this` ) Fires after the component is destroyed. Fires after the component is destroyed. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| disable : ( `Ext.Component this` ) Fires after the component is disabled. Fires after the component is disabled. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| enable : ( `Ext.Component this` ) Fires after the component is enabled. Fires after the component is enabled. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| hide : ( `Ext.Component this` ) Fires after the component is hidden. Fires after the component is hidden. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| move : ( `Ext.Component this`, `Number x`, `Number y` ) Fires after the component is moved. Fires after the component is moved. Listeners will be called with the following arguments: `this` : Ext.Component `x` : Number The new x position `y` : Number The new y position | BoxComponent
| remove : ( `Ext.Container this`, `Ext.Component component` ) Fires after any Ext.Component is removed from the container. Fires after any Ext.Component is removed from the container. Listeners will be called with the following arguments: `this` : Ext.Container `component` : Ext.Component The component that was removed | Container
| render : ( `Ext.Component this` ) Fires after the component is rendered. Fires after the component is rendered. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| resize : ( `Ext.Component this`, `Number adjWidth`, `Number adjHeight`, `Number rawWidth`, `Number rawHeight` ) Fires after the component is resized. Fires after the component is resized. Listeners will be called with the following arguments: `this` : Ext.Component `adjWidth` : Number The box-adjusted width that was set `adjHeight` : Number The box-adjusted height that was set `rawWidth` : Number The width that was originally specified `rawHeight` : Number The height that was originally specified | BoxComponent
| show : ( `Ext.Component this` ) Fires after the component is shown. Fires after the component is shown. Listeners will be called with the following arguments: `this` : Ext.Component | Component
| staterestore : ( `Ext.Component this`, `Object state` ) Fires after the state of the component is restored. Fires after the state of the component is restored. Listeners will be called with the following arguments: `this` : Ext.Component `state` : Object The hash of state values | Component
| statesave : ( `Ext.Component this`, `Object state` ) Fires after the state of the component is saved to the configured state provider. Fires after the state of the component is saved to the configured state provider. Listeners will be called with the following arguments: `this` : Ext.Component `state` : Object The hash of state values | Component