#

API Docs for: 3.10.3
Show: Inherited Protected Private Deprecated

# Overlay Class

Uses

- WidgetStdMod
- WidgetPosition
- WidgetStack
- WidgetPositionAlign
- WidgetPositionConstrain

Extends Widget
Defined in: `overlay/js/Overlay.js:9`
Module: overlay

A basic Overlay Widget, which can be positioned based on Page XY co-ordinates and is stackable (z-index support). It also provides alignment and centering support and uses a standard module format for it's content, with header, body and footer section support.

## Constructor

### `Overlay`

(

- `object`

)

Defined in `overlay/js/Overlay.js:9`

#### Parameters:

- `object` Object

  The user configuration for the instance.

- Index
- Methods
- Properties
- Attributes
- Events

## Item Index

### Methods

- _addAttrs
- _addLazyAttr
- _addShimResizeHandlers
- _addStdModContent
- _afterAlignChange
- _afterAlignOnChange
- _afterBodyChange
- _afterChildSelectedChange
- _afterConstrainChange
- _afterFillHeightChange
- _afterFooterChange
- _afterHeaderChange
- _afterShimChange
- _afterXYChange
- _afterZIndexChange
- _aggregateAttrs
- _applyParsedConfig
- _applyParser
- _applyStdModParsedConfig
- _attachPosAlignUIHandles
- _attrCfgHash
- _baseDestroy
- _baseInit
- _bindAttrUI
- _bindDOM
- _bindUI
- _bindUIChild
- _bindUIPosAlign
- _bindUIPosConstrained
- _bindUIPosition
- _bindUIStack
- _bindUIStdMod
- _cloneDefaultValue
- _constrain
- _constrainOnXYChange
- _createUIEvent
- _defAttrChangeFn
- _defaultCB
- _defDestroyFn
- _defInitFn
- _defRenderFn
- _destroyBox
- _destroyHierarchy
- _destroyShim
- _destroyUIEvents
- _detachPosAlignUIHandles
- _detachStackHandles
- _doAlign
- _eraseStdMod
- _fillHeight
- _filterAdHocAttrs
- _filterAttrCfgs
- _filterUIEvent
- _findStdModSection
- _fireAttrChange
- _getAttr
- _getAttrCfg
- _getAttrCfgs
- _getAttrInitVal
- _getAttrs
- _getClasses
- _getFullType
- _getHtmlParser
- _getNodeToParse
- _getPreciseHeight
- _getRegion
- _getShimTemplate
- _getSrcNode
- _getStateVal
- _getStdModContent
- _getStdModTemplate
- _getStrings
- _getType
- _getUIEventNode
- _getX
- _getY
- _guid
- _initAttrHost
- _initAttribute
- _initAttrs
- _initBase
- _initHierarchy
- _initHierarchyData
- _initUIEvent
- _insertStdModSection
- _isLazyAttr
- _isUIEvent
- _mapInstance
- _monitor
- _normAttrVals
- _onDocFocus
- _onDocMouseDown
- _parseStdModHTML
- _parseType
- _parseZIndex
- _preInitEventCfg
- _preventOverlap
- _protectAttrs deprecated
- _publish
- _removeLoadingClassNames
- _renderBox
- _renderBoxClassNames
- _renderShim
- _renderShimDeferred
- _renderStdMod
- _renderUI
- _renderUIPosition
- _renderUIStack
- _renderUIStdMod
- _set
- _setAlignCenter
- _setAttr
- _setAttrs
- _setAttrUI
- _setAttrVal
- _setBB
- _setBox
- _setCB
- _setConstrain
- _setStateVal
- _setStrings
- _setX
- _setY
- _setZIndex
- _strSetter
- _syncAttrUI
- _syncUI
- _syncUIChild
- _syncUIPosAlign
- _syncUIPosition
- _syncUIStack
- _syncUIStdMod
- _uiSetAlign
- _uiSetChildSelected
- _uiSetDim
- _uiSetDisabled
- _uiSetFillHeight
- _uiSetFocused
- _uiSetHeight
- _uiSetShim
- _uiSetStdMod
- _uiSetTabIndex
- _uiSetVisible
- _uiSetVisiblePosAlign
- _uiSetWidth
- _uiSetXY
- _uiSetZIndex
- _uiSizeCB
- _unbindDOM
- _unbindUI
- _validateFillHeight
- _validateXY
- _validTabIndex
- addAttr
- addAttrs
- addTarget
- after
- align
- ancestor
- attrAdded
- before
- bindUI
- blur
- bubble
- centered
- constrain
- destroy
- destructor
- detach
- detachAll
- disable
- enable
- enable or disable constraints listeners
- fillHeight
- fire
- focus
- get
- getAttrs
- getClassName
- getConstrainedXY
- getDefaultLocale
- getEvent
- getSkinName
- getStdModNode
- getString deprecated
- getStrings deprecated
- getTargets
- hide
- init
- initializer
- isRoot
- modifyAttr
- move
- next
- on
- once
- onceAfter
- parseType
- previous
- publish
- removeAttr
- removeTarget
- render
- renderer
- renderUI
- reset
- set
- setAttrs
- setStdModContent
- show
- sizeShim
- subscribe deprecated
- syncUI
- syncXY
- toString
- unsubscribe deprecated
- unsubscribeAll deprecated

### Properties

- _allowAdHocAttrs
- _posAlignUIHandles
- _UI_ATTRS
- BOUNDING_TEMPLATE
- CONTENT_TEMPLATE
- DEF_PARENT_NODE
- DEF_UNIT
- name deprecated
- UI_EVENTS

### Attributes

- align
- alignOn
- bodyContent
- boundingBox
- centered
- constrain
- contentBox
- destroyed
- disabled
- fillHeight
- focused
- footerContent
- headerContent
- height
- id
- initialized
- locale
- preventOverlap
- render
- rendered
- shim
- srcNode
- strings
- tabIndex
- visible
- width
- x
- xy
- y
- zIndex

### Events

- destroy
- init
- render
- widget:contentUpdate

## Methods

### `_addAttrs`

(

- `cfgs`
- `values`
- `lazy`

)
private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:836`

Implementation behind the public addAttrs method.

This method is invoked directly by get if it encounters a scenario in which an attribute's valueFn attempts to obtain the value an attribute in the same group of attributes, which has not yet been added (on demand initialization).

#### Parameters:

- `cfgs` Object

  An object with attribute name/configuration pairs.

- `values` Object

  An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.

- `lazy` Boolean

  Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.

### `_addLazyAttr`

(

- `name`
- `[lazyCfg]`

)
private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:382`

Finishes initializing an attribute which has been lazily added.

#### Parameters:

- `name` Object

  The name of the attribute

- `[lazyCfg]` Object optional

  Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained lazy config from state.

### `_addShimResizeHandlers`

() private

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:327`

Sets up event listeners to resize the shim when the size of the Widget changes.

NOTE: This method is only used for IE6 currently, since IE6 doesn't support a way to resize the shim purely through CSS, when the Widget does not have an explicit width/height set.

### `_addStdModContent`

(

- `node`
- `children`
- `where`

)
private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:545`

Helper method to add content to a StdMod section node. The content is added either before, after or replaces the existing node content based on the value of the `where` argument.

#### Parameters:

- `node` Node

  The section Node to be updated.

- `children` Node | NodeList | String

  The new content Node, NodeList or String to be added to section Node provided.

- `where` String

  Optional. Either WidgetStdMod.AFTER, WidgetStdMod.BEFORE or WidgetStdMod.REPLACE. If not provided, the content will replace existing content in the Node.

### `_afterAlignChange`

(

- `e`

)
protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:616`

Handles `alignChange` events by updating the UI in response to `align` Attribute changes.

#### Parameters:

- `e` EventFacade

### `_afterAlignOnChange`

(

- `e`

)
protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:631`

Handles `alignOnChange` events by updating the alignment-syncing event handlers.

#### Parameters:

- `e` EventFacade

### `_afterBodyChange`

(

- `e`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:344`

Default attribute change listener for the bodyContent attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_afterChildSelectedChange`

(

- `event`

)
protected

Inherited from Widget: `widget-child/js/Widget-Child.js:327`

Default attribute change listener for the `selected` attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `event` EventFacade

  The event facade for the attribute change.

### `_afterConstrainChange`

(

- `e`

)
protected

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:275`

After change listener for the "constrain" attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade

### `_afterFillHeightChange`

(

- `e`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:372`

Default attribute change listener for the fillHeight attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_afterFooterChange`

(

- `e`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:358`

Default attribute change listener for the footerContent attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_afterHeaderChange`

(

- `e`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:330`

Default attribute change listener for the headerContent attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_afterShimChange`

(

- `e`

)
protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:237`

Default attribute change listener for the shim attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_afterXYChange`

(

- `e`

)
protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:244`

Default attribute change listener for the xy attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_afterZIndexChange`

(

- `e`

)
protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:249`

Default attribute change listener for the zIndex attribute, responsible for updating the UI, in response to attribute changes.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_aggregateAttrs`

(

- `allAttrs`

)
Object private

Inherited from BaseCore: `base/js/BaseCore.js:575`

A helper method, used by _initHierarchyData to aggregate attribute configuration across the instances class hierarchy.

The method will protect the attribute configuration value to protect the statically defined default value in ATTRS if required (if the value is an object literal, array or the attribute configuration has cloneDefaultValue set to shallow or deep).

#### Parameters:

- `allAttrs` Array

  An array of ATTRS definitions across classes in the hierarchy (subclass first, Base last)

#### Returns:

Object: The aggregate set of ATTRS definitions for the instance

### `_applyParsedConfig`

() Object protected

Inherited from Widget: `widget/js/WidgetHTMLParser.js:83`

#### Returns:

Object: The merged configuration literal

### `_applyParser`

(

- `config`

)
protected

Inherited from Widget: `widget/js/WidgetHTMLParser.js:92`

Utility method used to apply the `HTML_PARSER` configuration for the instance, to retrieve config data values.

#### Parameters:

- `config` Object

  User configuration object (will be populated with values from Node)

### `_applyStdModParsedConfig`

() private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:637`

This method is injected before the applyParsedConfig step in the application of HTMLPARSER, and sets up the state to identify whether or not we should remove the current DOM content or not, based on whether or not the current content attribute value was extracted from the DOM, or provided by the user configuration

### `_attachPosAlignUIHandles`

() protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:458`

Attaches the alignment-syncing event handlers.

### `_attrCfgHash`

() private

Inherited from BaseCore: `base/js/BaseCore.js:538`

Utility method to define the attribute hash used to filter/whitelist property mixes for this class for iteration performance reasons.

### `_baseDestroy`

() private

Inherited from BaseCore: `base/js/BaseCore.js:309`

Internal destroy implementation for BaseCore

### `_baseInit`

() private

Inherited from BaseCore: `base/js/BaseCore.js:281`

Internal initialization implementation for BaseCore

### `_bindAttrUI`

(

- `attrs`

)
private

Inherited from Widget: `widget/js/Widget.js:1170`

Binds after listeners for the list of attributes provided

#### Parameters:

- `attrs` Array

### `_bindDOM`

() protected

Inherited from Widget: `widget/js/Widget.js:902`

Sets up DOM listeners, on elements rendered by the widget.

### `_bindUI`

() protected

Inherited from Widget: `widget/js/Widget.js:883`

Sets up DOM and CustomEvent listeners for the widget.

### `_bindUIChild`

() protected

Inherited from Widget: `widget-child/js/Widget-Child.js:356`

Binds event listeners responsible for updating the UI state in response to WidgetChild related state changes.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

### `_bindUIPosAlign`

() protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:238`

Bind event listeners responsible for updating the UI state in response to the widget's position-align related state changes.

This method is invoked after `bindUI` has been invoked for the `Widget` class using the AOP infrastructure.

### `_bindUIPosConstrained`

() protected

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:259`

Binds event listeners responsible for updating the UI state in response to Widget constrained positioning related state changes.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

### `_bindUIPosition`

() protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:143`

Binds event listeners responsible for updating the UI state in response to Widget position related state changes.

This method in invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

### `_bindUIStack`

() protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:155`

Binds event listeners responsible for updating the UI state in response to Widget stack related state changes.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

### `_bindUIStdMod`

() protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:310`

Binds event listeners responsible for updating the UI state in response to Widget standard module related state changes.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

### `_cloneDefaultValue`

(

- `cfg`

)
private

Inherited from BaseCore: `base/js/BaseCore.js:549`

This method assumes that the value has already been checked to be an object. Since it's on a critical path, we don't want to re-do the check.

#### Parameters:

- `cfg` Object

### `_constrain`

(

- `val`
- `axis`
- `nodeRegion`
- `constrainingRegion`

)
Number protected

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:164`

The method which performs the actual constrain calculations for a given axis ("x" or "y") based on the regions provided.

#### Parameters:

- `val` Number

  The value to constrain

- `axis` String

  The axis to use for constrainment

- `nodeRegion` Region

  The region of the node to constrain

- `constrainingRegion` Region

  The region of the node (or viewport) to constrain to

#### Returns:

Number: The constrained value

### `_constrainOnXYChange`

(

- `e`

)
protected

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:305`

The on change listener for the "xy" attribute. Modifies the event facade's newVal property with the constrained XY value.

#### Parameters:

- `e` EventFacade

  The event facade for the attribute change

### `_createUIEvent`

(

- `type`

)
private

Inherited from Widget: `widget/js/WidgetUIEvents.js:73`

Binds a delegated DOM event listener of the specified type to the Widget's outtermost DOM element to facilitate the firing of a Custom Event of the same type for the Widget instance.

#### Parameters:

- `type` String

  String representing the name of the event

### `_defAttrChangeFn`

(

- `e`

)
private

Inherited from AttributeObservable: `attribute/js/AttributeObservable.js:186`

Default function for attribute change events.

#### Parameters:

- `e` EventFacade

  The event object for attribute change events.

### `_defaultCB`

() protected

Inherited from Widget: `widget/js/Widget.js:780`

Returns the default value for the contentBox attribute.

For the Widget class, this will be the srcNode if provided, otherwise null (resulting in a new contentBox node instance being created)

### `_defDestroyFn`

(

- `e`

)
protected

Inherited from BaseObservable: `base/js/BaseObservable.js:190`

Default destroy event handler

#### Parameters:

- `e` EventFacade

  Event object

### `_defInitFn`

(

- `e`

)
protected

Inherited from BaseObservable: `base/js/BaseObservable.js:178`

Default init event handler

#### Parameters:

- `e` EventFacade

  Event object, with a cfg property which refers to the configuration object passed to the constructor.

### `_defRenderFn`

(

- `e`
- `parentNode`

)
protected

Inherited from Widget: `widget/js/Widget.js:571`

Default render handler

#### Parameters:

- `e` EventFacade

  The Event object

- `parentNode` Node

  The parent node to render to, if passed in to the `render` method

### `_destroyBox`

() protected

Inherited from Widget: `widget/js/Widget.js:476`

Removes and destroys the widgets rendered boundingBox, contentBox, and detaches bound UI events.

### `_destroyHierarchy`

() private

Inherited from BaseCore: `base/js/BaseCore.js:721`

Destroys the class hierarchy for this instance by invoking the destructor method on the prototype of each class in the hierarchy.

### `_destroyShim`

() private

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:387`

Removes the shim from the DOM, and detaches any related event listeners.

### `_destroyUIEvents`

() private

Inherited from Widget: `widget/js/WidgetUIEvents.js:20`

Destructor logic for UI event infrastructure, invoked during Widget destruction.

### `_detachPosAlignUIHandles`

() protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:486`

Detaches the alignment-syncing event handlers.

### `_detachStackHandles`

(

- `String`

)
private

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:350`

Detaches any handles stored for the provided key

#### Parameters:

- `String` Object

  handleKey The key defining the group of handles which should be detached

### `_doAlign`

(

- `widgetPoint`
- `x`
- `y`

)
private

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:502`

Helper method, used to align the given point on the widget, with the XY page coordinates provided.

#### Parameters:

- `widgetPoint` String

  Supported point constant (e.g. WidgetPositionAlign.TL)

- `x` Number

  X page coordinate to align to.

- `y` Number

  Y page coordinate to align to.

### `_eraseStdMod`

(

- `section`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:489`

Removes the DOM node for the given section.

#### Parameters:

- `section` String

  The section to remove. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

### `_fillHeight`

() private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:422`

Updates the rendered UI, to resize the current section specified by the fillHeight attribute, so that the standard module fills out the Widget height. If a height has not been set on Widget, the section is not resized (height is set to "auto").

### `_filterAdHocAttrs`

(

- `allAttrs`
- `userVals`

)
Object private

Inherited from BaseCore: `base/js/BaseCore.js:427`

#### Parameters:

- `allAttrs` Object

  The set of all attribute configurations for this instance. Attributes will be removed from this set, if they belong to the filtered class, so that by the time all classes are processed, allCfgs will be empty.

- `userVals` Object

  The config object passed in by the user, from which adhoc attrs are to be filtered.

#### Returns:

Object: The set of adhoc attributes passed in, in the form of an object with attribute name/configuration pairs.

### `_filterAttrCfgs`

(

- `clazz`
- `allCfgs`

)
Object private

Inherited from BaseCore: `base/js/BaseCore.js:356`

A helper method used when processing ATTRS across the class hierarchy during initialization. Returns a disposable object with the attributes defined for the provided class, extracted from the set of all attributes passed in.

#### Parameters:

- `clazz` Function

  The class for which the desired attributes are required.

- `allCfgs` Object

  The set of all attribute configurations for this instance. Attributes will be removed from this set, if they belong to the filtered class, so that by the time all classes are processed, allCfgs will be empty.

#### Returns:

Object: The set of attributes belonging to the class passed in, in the form of an object with attribute name/configuration pairs.

### `_filterUIEvent`

(

- `evt`

)
Boolean private

Inherited from Widget: `widget/js/WidgetUIEvents.js:117`

This method is used to determine if we should fire the UI Event or not. The default implementation makes sure that for nested delegates (nested unrelated widgets), we don't fire the UI event listener more than once at each level.

For example, without the additional filter, if you have nested widgets, each widget will have a delegate listener. If you click on the inner widget, the inner delegate listener's filter will match once, but the outer will match twice (based on delegate's design) - once for the inner widget, and once for the outer.

#### Parameters:

- `evt` DOMEventFacade

#### Returns:

Boolean: true if it's OK to fire the custom UI event, false if not.

### `_findStdModSection`

(

- `section`

)
Node private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:598`

Helper method to to find the rendered node for the given section, if it exists.

#### Parameters:

- `section` String

  The section for which the render Node is to be found. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

#### Returns:

Node: The rendered node for the given section, or null if not found.

### `_fireAttrChange`

(

- `attrName`
- `subAttrName`
- `currVal`
- `newVal`
- `opts`
- `[cfg]`

)
private

Inherited from AttributeObservable: `attribute/js/AttributeObservable.js:120`

Utility method to help setup the event payload and fire the attribute change event.

#### Parameters:

- `attrName` String

  The name of the attribute

- `subAttrName` String

  The full path of the property being changed, if this is a sub-attribute value being change. Otherwise null.

- `currVal` Any

  The current value of the attribute

- `newVal` Any

  The new value of the attribute

- `opts` Object

  Any additional event data to mix into the attribute change event's event facade.

- `[cfg]` Object optional

  The attribute config stored in State, if already available.

### `_getAttr`

(

- `name`

)
Any protected chainable

Inherited from AttributeCore: `attribute/js/AttributeCore.js:543`

Provides the common implementation for the public get method, allowing Attribute hosts to over-ride either method.

See get for argument details.

#### Parameters:

- `name` String

  The name of the attribute.

#### Returns:

Any: The value of the attribute.

### `_getAttrCfg`

(

- `name`

)
Object protected

Inherited from AttributeExtras: `attribute/js/AttributeExtras.js:114`

Returns an object with the configuration properties (and value) for the given attribute. If attrName is not provided, returns the configuration properties for all attributes.

#### Parameters:

- `name` String

  Optional. The attribute name. If not provided, the method will return the configuration for all attributes.

#### Returns:

Object: The configuration properties for the given attribute, or all attributes.

### `_getAttrCfgs`

() Object protected

Inherited from BaseCore: `base/js/BaseCore.js:339`

Returns an aggregated set of attribute configurations, by traversing the class hierarchy.

#### Returns:

Object: The hash of attribute configurations, aggregated across classes in the hierarchy This value is cached the first time the method, or _getClasses, is invoked. Subsequent invocations return the cached value.

### `_getAttrInitVal`

(

- `attr`
- `cfg`
- `initValues`

)
Any private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:945`

Returns the initial value of the given attribute from either the default configuration provided, or the over-ridden value if it exists in the set of initValues provided and the attribute is not read-only.

#### Parameters:

- `attr` String

  The name of the attribute

- `cfg` Object

  The attribute configuration object

- `initValues` Object

  The object with simple and complex attribute name/value pairs returned from _normAttrVals

#### Returns:

Any: The initial value of the attribute.

### `_getAttrs`

(

- `attrs`

)
Object protected

Inherited from AttributeCore: `attribute/js/AttributeCore.js:774`

Implementation behind the public getAttrs method, to get multiple attribute values.

#### Parameters:

- `attrs` Array | boolean

  Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

#### Returns:

Object: An object with attribute name/value pairs.

### `_getClasses`

() Function[] protected

Inherited from BaseCore: `base/js/BaseCore.js:323`

Returns the class hierarchy for this object, with BaseCore being the last class in the array.

#### Returns:

Function[]: An array of classes (constructor functions), making up the class hierarchy for this object. This value is cached the first time the method, or _getAttrCfgs, is invoked. Subsequent invocations return the cached value.

### `_getFullType`

(

- `type`

)
String private

Inherited from EventTarget: `event-custom/js/event-target.js:586`

Returns the fully qualified type, given a short type string. That is, returns "foo:bar" when given "bar" if "foo" is the configured prefix.

NOTE: This method, unlike _getType, does no checking of the value passed in, and is designed to be used with the low level _publish() method, for critical path implementations which need to fast-track publish for performance reasons.

#### Parameters:

- `type` String

  The short type to prefix

#### Returns:

String: The prefixed type, if a prefix is set, otherwise the type passed in

### `_getHtmlParser`

() Object private

Inherited from Widget: `widget/js/WidgetHTMLParser.js:149`

Gets the HTMLPARSER definition for this instance, by merging HTMLPARSER definitions across the class hierarchy.

#### Returns:

Object: HTML_PARSER definition for this instance

### `_getNodeToParse`

() Node private

Inherited from Widget: `widget/js/WidgetHTMLParser.js:134`

Determines whether we have a node reference which we should try and parse.

The current implementation does not parse nodes generated from CONTENT_TEMPLATE, only explicitly set srcNode, or contentBox attributes.

#### Returns:

Node: The node reference to apply HTML_PARSER to.

### `_getPreciseHeight`

(

- `node`

)
Number private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:575`

Helper method to obtain the precise height of the node provided, including padding and border. The height could be a sub-pixel value for certain browsers, such as Firefox 3.

#### Parameters:

- `node` Node

  The node for which the precise height is required.

#### Returns:

Number: The height of the Node including borders and padding, possibly a float.

### `_getRegion`

(

- `[node]`

)
Object private

Inherited from WidgetPositionConstrain but overwritten in `widget-position-align/js/Widget-PositionAlign.js:590`

Returns the region of the passed-in `Node`, or the viewport region if calling with passing in a `Node`.

#### Parameters:

- `[node]` Node optional

  The node to get the region of.

#### Returns:

Object: The node's region.

### `_getShimTemplate`

() Node private

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:421`

Creates a cloned shim node, using the SHIM_TEMPLATE html template, for use on a new instance.

#### Returns:

Node: node A new shim Node instance.

### `_getSrcNode`

() Node protected

Inherited from Widget: `widget/js/WidgetHTMLParser.js:74`

#### Returns:

Node: The Node to apply HTML_PARSER to

### `_getStateVal`

(

- `name`
- `[cfg]`

)
Any private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:600`

Gets the stored value for the attribute, from either the internal state object, or the state proxy if it exits

#### Parameters:

- `name` String

  The name of the attribute

- `[cfg]` Object optional

  Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained the config from state.

#### Returns:

Any: The stored value of the attribute

### `_getStdModContent`

(

- `section`

)
Node private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:656`

Retrieves the child nodes (content) of a standard module section

#### Parameters:

- `section` String

  The standard module section whose child nodes are to be retrieved. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

#### Returns:

Node: The child node collection of the standard module section.

### `_getStdModTemplate`

(

- `section`

)
Node protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:532`

Gets a new Node reference for the given standard module section, by cloning the stored template node.

#### Parameters:

- `section` String

  The section to create a new node for. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

#### Returns:

Node: The new Node instance for the section

### `_getStrings`

(

- `locale`

)
protected

Inherited from Widget: `widget/js/WidgetLocale.js:56`

Returns the strings key/value hash for a paricular locale, without locale lookup applied.

#### Parameters:

- `locale` Object

### `_getType`

() private

Inherited from EventTarget: `event-custom/js/event-target.js:36`

If the instance has a prefix attribute and the event type is not prefixed, the instance prefix is applied to the supplied type.

### `_getUIEventNode`

() protected

Inherited from Widget but overwritten in `widget-child/js/Widget-Child.js:167`

Returns the node on which to bind delegate listeners.

Override of Widget's implementation of _getUIEventNode() to ensure that all event listeners are bound to the Widget's topmost DOM element. This ensures that the firing of each type of Widget UI event (click, mousedown, etc.) is facilitated by a single, top-level, delegated DOM event listener.

### `_getX`

() Number protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:220`

Default getter for the X attribute. The value is retrieved from the XY attribute, which is the sole store for the XY state.

#### Returns:

Number: The X page co-ordinate value

### `_getY`

() Number protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:232`

Default getter for the Y attribute. The value is retrieved from the XY attribute, which is the sole store for the XY state.

#### Returns:

Number: The Y page co-ordinate value

### `_guid`

() protected

Inherited from Widget: `widget/js/Widget.js:1153`

### `_initAttrHost`

(

- `attrs`
- `values`
- `lazy`

)
private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:140`

Constructor logic for attributes. Initializes the host state, and sets up the inital attributes passed to the constructor.

#### Parameters:

- `attrs` Object

  The attributes to add during construction (passed through to addAttrs). These can also be defined on the constructor being augmented with Attribute by defining the ATTRS property on the constructor.

- `values` Object

  The initial attribute values to apply (passed through to addAttrs). These are not merged/cloned. The caller is responsible for isolating user provided values if required.

- `lazy` Boolean

  Whether or not to add attributes lazily (passed through to addAttrs).

### `_initAttribute`

() private

Inherited from BaseObservable but overwritten in `base/js/BaseCore.js:254`

Initializes AttributeCore

### `_initAttrs`

(

- `attrs`
- `values`
- `lazy`

)
protected

Inherited from AttributeCore: `attribute/js/AttributeCore.js:1011`

Utility method to set up initial attributes defined during construction, either through the constructor.ATTRS property, or explicitly passed in.

#### Parameters:

- `attrs` Object

  The attributes to add during construction (passed through to addAttrs). These can also be defined on the constructor being augmented with Attribute by defining the ATTRS property on the constructor.

- `values` Object

  The initial attribute values to apply (passed through to addAttrs). These are not merged/cloned. The caller is responsible for isolating user provided values if required.

- `lazy` Boolean

  Whether or not to add attributes lazily (passed through to addAttrs).

### `_initBase`

(

- `config`

)
private

Inherited from BaseCore: `base/js/BaseCore.js:219`

Internal construction logic for BaseCore.

#### Parameters:

- `config` Object

  The constructor configuration object

### `_initHierarchy`

(

- `userVals`

)
private

Inherited from BaseCore: `base/js/BaseCore.js:659`

Initializes the class hierarchy for the instance, which includes initializing attributes for each class defined in the class's static ATTRS property and invoking the initializer method on the prototype of each class in the hierarchy.

#### Parameters:

- `userVals` Object

  Object with configuration property name/value pairs

### `_initHierarchyData`

() private

Inherited from BaseCore: `base/js/BaseCore.js:457`

A helper method used by _getClasses and _getAttrCfgs, which determines both the array of classes and aggregate set of attribute configurations across the class hierarchy for the instance.

### `_initUIEvent`

(

- `type`

)
String private

Inherited from Widget: `widget/js/WidgetUIEvents.js:176`

Sets up infrastructure required to fire a UI event.

#### Parameters:

- `type` String

  String representing the name of the event

#### Returns:

String:

### `_insertStdModSection`

(

- `contentBox`
- `section`
- `sectionNode`

)
private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:504`

Helper method to insert the Node for the given section into the correct location in the contentBox.

#### Parameters:

- `contentBox` Node

  A reference to the Widgets content box.

- `section` String

  The section to create/render. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

- `sectionNode` Node

  The Node for the section.

### `_isLazyAttr`

(

- `name`

)
Boolean private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:369`

Checks whether or not the attribute is one which has been added lazily and still requires initialization.

#### Parameters:

- `name` String

  The name of the attribute

#### Returns:

Boolean: true if it's a lazily added attribute, false otherwise.

### `_isUIEvent`

(

- `type`

)
String private

Inherited from Widget: `widget/js/WidgetUIEvents.js:143`

Determines if the specified event is a UI event.

#### Parameters:

- `type` String

  String representing the name of the event

#### Returns:

String: Event Returns the name of the UI Event, otherwise undefined.

### `_mapInstance`

(

- `The`

)
protected

Inherited from Widget: `widget/js/Widget.js:414`

Utility method used to add an entry to the boundingBox id to instance map.

This method can be used to populate the instance with lazily created boundingBox Node references.

#### Parameters:

- `The` String

  boundingBox id

### `_monitor`

(

- `what`
- `eventType`
- `o`

)
private

Inherited from EventTarget: `event-custom/js/event-target.js:658`

This is the entry point for the event monitoring system. You can monitor 'attach', 'detach', 'fire', and 'publish'. When configured, these events generate an event. click -> clickattach, clickdetach, click_publish -- these can be subscribed to like other events to monitor the event system. Inividual published events can have monitoring turned on or off (publish can't be turned off before it it published) by setting the events 'monitor' config.

#### Parameters:

- `what` String

  'attach', 'detach', 'fire', or 'publish'

- `eventType` String | CustomEvent

  The prefixed name of the event being monitored, or the CustomEvent object.

- `o` Object

  Information about the event interaction, such as fire() args, subscription category, publish config

### `_normAttrVals`

(

- `valueHash`

)
Object private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:897`

Utility method to normalize attribute values. The base implementation simply merges the hash to protect the original.

#### Parameters:

- `valueHash` Object

  An object with attribute name/value pairs

#### Returns:

Object: An object literal with 2 properties - "simple" and "complex", containing simple and complex attribute values respectively keyed by the top level attribute name, or null, if valueHash is falsey.

### `_onDocFocus`

(

- `evt`

)
protected

Inherited from Widget: `widget/js/Widget.js:1081`

DOM focus event handler, used to sync the state of the Widget with the DOM

#### Parameters:

- `evt` EventFacade

  The event facade for the DOM focus event

### `_onDocMouseDown`

(

- `evt`

)
protected

Inherited from Widget: `widget/js/Widget.js:1068`

"mousedown" event handler for the owner document of the widget's bounding box.

#### Parameters:

- `evt` EventFacade

  The event facade for the DOM focus event

### `_parseStdModHTML`

(

- `section`

)
String private

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:611`

Utility method, used by WidgetStdMods HTML_PARSER implementation to extract data for each section from markup.

#### Parameters:

- `section` String

#### Returns:

String: Inner HTML string with the contents of the section

### `_parseType`

() private

Inherited from EventTarget: `event-custom/js/event-target.js:52`

Returns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)

### `_parseZIndex`

(

- `srcNode`

)
Mixed protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:183`

Parses a `zIndex` attribute value from this widget's `srcNode`.

#### Parameters:

- `srcNode` Node

  The node to parse a `zIndex` value from.

#### Returns:

Mixed: The parsed `zIndex` value.

### `_preInitEventCfg`

(

- `config`

)
private

Inherited from BaseObservable: `base/js/BaseObservable.js:98`

Handles the special on, after and target properties which allow the user to easily configure on and after listeners as well as bubble targets during construction, prior to init.

#### Parameters:

- `config` Object

  The user configuration object

### `_preventOverlap`

(

- `val`
- `axis`
- `nodeRegion`
- `constrainingRegion`

)
Number protected

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:208`

The method which performs the preventOverlap calculations for a given axis ("x" or "y") based on the value and regions provided.

#### Parameters:

- `val` Number

  The value being constrain

- `axis` String

  The axis to being constrained

- `nodeRegion` Region

  The region of the node being constrained

- `constrainingRegion` Region

  The region of the node (or viewport) we need to constrain to

#### Returns:

Number: The constrained value

### `_protectAttrs`

(

- `attrs`

)
Object deprecated protected

Inherited from AttributeCore: `attribute/js/AttributeCore.js:883`

Deprecated: Use `AttributeCore.protectAttrs()` or `Attribute.protectAttrs()` which are the same static utility method.

Utility method to protect an attribute configuration hash, by merging the entire object and the individual attr config objects.

#### Parameters:

- `attrs` Object

  A hash of attribute to configuration object pairs.

#### Returns:

Object: A protected version of the attrs argument.

### `_publish`

(

- `fullType`
- `etOpts`
- `ceOpts`

)
CustomEvent private

Inherited from EventTarget: `event-custom/js/event-target.js:610`

The low level event publish implementation. It expects all the massaging to have been done outside of this method. e.g. the `type` to `fullType` conversion. It's designed to be a fast path publish, which can be used by critical code paths to improve performance.

#### Parameters:

- `fullType` String

  The prefixed type of the event to publish.

- `etOpts` Object

  The EventTarget specific configuration to mix into the published event.

- `ceOpts` Object

  The publish specific configuration to mix into the published event.

#### Returns:

CustomEvent: The published event. If called without `etOpts` or `ceOpts`, this will be the default `CustomEvent` instance, and can be configured independently.

### `_removeLoadingClassNames`

() protected

Inherited from Widget: `widget/js/Widget.js:862`

Removes class names representative of the widget's loading state from the boundingBox.

### `_renderBox`

(

- `parentNode`

)
private

Inherited from Widget: `widget/js/Widget.js:710`

Helper method to collect the boundingBox and contentBox and append to the provided parentNode, if not already a child. The owner document of the boundingBox, or the owner document of the contentBox will be used as the document into which the Widget is rendered if a parentNode is node is not provided. If both the boundingBox and the contentBox are not currently in the document, and no parentNode is provided, the widget will be rendered to the current document's body.

#### Parameters:

- `parentNode` Node

  The parentNode to render the widget to. If not provided, and both the boundingBox and the contentBox are not currently in the document, the widget will be rendered to the current document's body.

### `_renderBoxClassNames`

() protected

Inherited from Widget: `widget/js/Widget.js:838`

Applies standard class names to the boundingBox and contentBox

### `_renderShim`

() private

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:368`

Creates the shim element and adds it to the DOM

### `_renderShimDeferred`

() private

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:301`

Sets up change handlers for the visible attribute, to defer shim creation/rendering until the Widget is made visible.

### `_renderStdMod`

(

- `section`

)
Node protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:466`

Creates the DOM node for the given section, and inserts it into the correct location in the contentBox.

#### Parameters:

- `section` String

  The section to create/render. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

#### Returns:

Node: A reference to the added section node

### `_renderUI`

() protected

Inherited from Widget: `widget/js/Widget.js:827`

Initializes the UI state for the Widget's bounding/content boxes.

### `_renderUIPosition`

() protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:113`

Creates/Initializes the DOM to support xy page positioning.

This method in invoked after renderUI is invoked for the Widget class using YUI's aop infrastructure.

### `_renderUIStack`

() protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:170`

Creates/Initializes the DOM to support stackability.

This method in invoked after renderUI is invoked for the Widget class using YUI's aop infrastructure.

### `_renderUIStdMod`

() protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:284`

Creates/Initializes the DOM for standard module support.

This method is invoked after renderUI is invoked for the Widget class using YUI's aop infrastructure.

### `_set`

(

- `name`
- `val`
- `[opts]`

)
Object protected chainable

Inherited from AttributeObservable but overwritten in `attribute/js/AttributeCore.js:427`

Allows setting of readOnly/writeOnce attributes. See set for argument details.

#### Parameters:

- `name` String

  The name of the attribute.

- `val` Any

  The value to set the attribute to.

- `[opts]` Object optional

  Optional data providing the circumstances for the change.

#### Returns:

Object: A reference to the host object.

### `_setAlignCenter`

(

- `val`

)
Boolean | Node protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:327`

Default setter for `center` Attribute changes. Sets up the appropriate value, and passes it through the to the align attribute.

#### Parameters:

- `val` Boolean | Node

  The Attribute value being set.

#### Returns:

Boolean | Node: the value passed in.

### `_setAttr`

(

- `name`
- `value`
- `[opts]`
- `force`

)
Object protected chainable

Inherited from AttributeCore: `attribute/js/AttributeCore.js:443`

Provides the common implementation for the public set and protected _set methods.

See set for argument details.

#### Parameters:

- `name` String

  The name of the attribute.

- `value` Any

  The value to set the attribute to.

- `[opts]` Object optional

  Optional data providing the circumstances for the change.

- `force` Boolean

  If true, allows the caller to set values for readOnly or writeOnce attributes which have already been set.

#### Returns:

Object: A reference to the host object.

### `_setAttrs`

(

- `attrs`
- `[opts]`

)
Object protected chainable

Inherited from AttributeObservable but overwritten in `attribute/js/AttributeCore.js:742`

Implementation behind the public setAttrs method, to set multiple attribute values.

#### Parameters:

- `attrs` Object

  An object with attributes name/value pairs.

- `[opts]` Object optional

  Optional data providing the circumstances for the change

#### Returns:

Object: A reference to the host object.

### `_setAttrUI`

(

- `e`

)
private

Inherited from Widget: `widget/js/Widget.js:1201`

#### Parameters:

- `e` EventFacade

### `_setAttrVal`

(

- `attrName`
- `subAttrName`
- `prevVal`
- `newVal`
- `[opts]`
- `[attrCfg]`

)
Booolean private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:640`

Updates the stored value of the attribute in the privately held State object, if validation and setter passes.

#### Parameters:

- `attrName` String

  The attribute name.

- `subAttrName` String

  The sub-attribute name, if setting a sub-attribute property ("x.y.z").

- `prevVal` Any

  The currently stored value of the attribute.

- `newVal` Any

  The value which is going to be stored.

- `[opts]` Object optional

  Optional data providing the circumstances for the change.

- `[attrCfg]` Object optional

  Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained the config from state.

#### Returns:

Booolean: true if the new attribute value was stored, false if not.

### `_setBB`

(

- `Node/String`

)
private

Inherited from Widget: `widget/js/Widget.js:756`

Setter for the boundingBox attribute

#### Parameters:

- `Node/String` Object

#### Returns:

Node

### `_setBox`

(

- `id`
- `node`
- `template`
- `true`

)
Node private

Inherited from Widget: `widget/js/Widget.js:793`

Helper method to set the bounding/content box, or create it from the provided template if not found.

#### Parameters:

- `id` String

  The node's id attribute

- `node` Node | String

  The node reference

- `template` String

  HTML string template for the node

- `true` Boolean

  if this is the boundingBox, false if it's the contentBox

#### Returns:

Node: The node

### `_setCB`

(

- `node`

)
private

Inherited from Widget: `widget/js/Widget.js:768`

Setter for the contentBox attribute

#### Parameters:

- `node` Node | String

#### Returns:

Node

### `_setConstrain`

(

- `val`

)
protected

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:153`

The setter implementation for the "constrain" attribute.

#### Parameters:

- `val` Node | boolean

  The attribute value

### `_setStateVal`

(

- `name`
- `value`

)
private

Inherited from AttributeCore: `attribute/js/AttributeCore.js:622`

Sets the stored value for the attribute, in either the internal state object, or the state proxy if it exits

#### Parameters:

- `name` String

  The name of the attribute

- `value` Any

  The value of the attribute

### `_setStrings`

(

- `strings`
- `locale`

)
protected

Inherited from Widget: `widget/js/WidgetLocale.js:35`

Sets strings for a particular locale, merging with any existing strings which may already be defined for the locale.

#### Parameters:

- `strings` Object

  The hash of string key/values to set

- `locale` Object

  The locale for the string values being set

### `_setX`

(

- `val`

)
protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:196`

Default setter for the X attribute. The setter passes the X value through to the XY attribute, which is the sole store for the XY state.

#### Parameters:

- `val` Number

  The X page co-ordinate value

### `_setY`

(

- `val`

)
protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:208`

Default setter for the Y attribute. The setter passes the Y value through to the XY attribute, which is the sole store for the XY state.

#### Parameters:

- `val` Number

  The Y page co-ordinate value

### `_setZIndex`

(

- `zIndex`

)
Number protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:218`

Default setter for zIndex attribute changes. Normalizes zIndex values to numbers, converting non-numerical values to 0.

#### Parameters:

- `zIndex` String | Number

#### Returns:

Number: Normalized zIndex

### `_strSetter`

(

- `strings`

)
String protected

Inherited from Widget: `widget/js/Widget.js:1212`

The default setter for the strings attribute. Merges partial sets into the full string set, to allow users to partial sets of strings

#### Parameters:

- `strings` Object

#### Returns:

String: The full set of strings to set

### `_syncAttrUI`

(

- `attrs`

)
private

Inherited from Widget: `widget/js/Widget.js:1186`

Invokes the _uiSet=ATTR NAME> method for the list of attributes provided

#### Parameters:

- `attrs` Array

### `_syncUI`

() protected

Inherited from Widget: `widget/js/Widget.js:964`

Updates the widget UI to reflect the attribute state.

### `_syncUIChild`

() protected

Inherited from Widget: `widget-child/js/Widget-Child.js:341`

Synchronizes the UI to match the WidgetChild state.

This method is invoked after bindUI is invoked for the Widget class using YUI's aop infrastructure.

### `_syncUIPosAlign`

() protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:254`

Synchronizes the current `align` Attribute value to the DOM.

This method is invoked after `syncUI` has been invoked for the `Widget` class using the AOP infrastructure.

### `_syncUIPosition`

() protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:126`

Synchronizes the UI to match the Widgets xy page position state.

This method in invoked after syncUI is invoked for the Widget class using YUI's aop infrastructure.

### `_syncUIStack`

() protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:143`

Synchronizes the UI to match the Widgets stack state. This method in invoked after syncUI is invoked for the Widget class using YUI's aop infrastructure.

### `_syncUIStdMod`

() protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:257`

Synchronizes the UI to match the Widgets standard module state.

This method is invoked after syncUI is invoked for the Widget class using YUI's aop infrastructure.

### `_uiSetAlign`

(

- `[node]`
- `points`

)
protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:347`

Updates the UI to reflect the `align` value passed in.

Note: See the `align` Attribute documentation, for the Object structure expected.

#### Parameters:

- `[node]` Node | String | Null optional

  The node to align to, or null to indicate the viewport.

- `points` Array

  The alignment points.

### `_uiSetChildSelected`

(

- `selected`

)
protected

Inherited from Widget: `widget-child/js/Widget-Child.js:305`

Updates the UI to reflect the `selected` attribute value.

#### Parameters:

- `selected` Number

  The selected value to be reflected in the UI.

### `_uiSetDim`

(

- `dim`
- `val`

)
private

Inherited from Widget: `widget/js/Widget.js:997`

#### Parameters:

- `dim` String

  The dimension - "width" or "height"

- `val` Number | String

  The value to set

### `_uiSetDisabled`

(

- `val`

)
protected

Inherited from Widget: `widget/js/Widget.js:1018`

Sets the disabled state for the UI

#### Parameters:

- `val` Boolean

### `_uiSetFillHeight`

(

- `fillSection`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:398`

Updates the rendered UI, to resize the provided section so that the standard module fills out the specified widget height. Note: This method does not check whether or not a height is set on the Widget.

#### Parameters:

- `fillSection` String

  A valid section specifier - one of WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER

### `_uiSetFocused`

(

- `val`
- `src`

)
protected

Inherited from Widget: `widget/js/Widget.js:1029`

Sets the focused state for the UI

#### Parameters:

- `val` Boolean
- `src` String

  String representing the source that triggered an update to the UI.

### `_uiSetHeight`

(

- `val`

)
protected

Inherited from Widget: `widget/js/Widget.js:974`

Sets the height on the widget's bounding box element

#### Parameters:

- `val` String | Number

### `_uiSetShim`

(

- `enable`

)
protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:272`

Updates the UI to enable/disable the shim. If the widget is not currently visible, creation of the shim is deferred until it is made visible, for performance reasons.

#### Parameters:

- `enable` Boolean

  If true, creates/renders the shim, if false, removes it.

### `_uiSetStdMod`

(

- `section`
- `content`
- `where`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:439`

Updates the rendered UI, adding the provided content (either an HTML string, or node reference), to the specified section. The content is either added before, after or replaces existing content in the section, based on the value of the `where` argument.

#### Parameters:

- `section` String

  The section to be updated. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

- `content` String | Node

  The new content (either as an HTML string, or Node reference) to add to the section

- `where` String

  Optional. Either WidgetStdMod.AFTER, WidgetStdMod.BEFORE or WidgetStdMod.REPLACE. If not provided, the content will replace existing content in the section.

### `_uiSetTabIndex`

(

- `Number`

)
protected

Inherited from Widget: `widget/js/Widget.js:1051`

Set the tabIndex on the widget's rendered UI

#### Parameters:

- `Number` Object

### `_uiSetVisible`

(

- `val`

)
protected

Inherited from Widget: `widget/js/Widget.js:1007`

Sets the visible state for the UI

#### Parameters:

- `val` Boolean

### `_uiSetVisiblePosAlign`

(

- `visible`

)
protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:441`

Attaches or detaches alignment-syncing event handlers based on the widget's `visible` Attribute state.

#### Parameters:

- `visible` Boolean

  The current value of the widget's `visible` Attribute.

### `_uiSetWidth`

(

- `val`

)
protected

Inherited from Widget: `widget/js/Widget.js:986`

Sets the width on the widget's bounding box element

#### Parameters:

- `val` String | Number

### `_uiSetXY`

(

- `val`

)
protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:258`

Updates the UI to reflect the XY page co-ordinates passed in.

#### Parameters:

- `val` String

  The XY page co-ordinates value to be reflected in the UI

### `_uiSetZIndex`

(

- `zIndex`

)
protected

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:261`

Updates the UI to reflect the zIndex value passed in.

#### Parameters:

- `zIndex` Number

  The zindex to be reflected in the UI

### `_uiSizeCB`

(

- `expand`

)
protected

Inherited from Widget: `widget/js/Widget.js:701`

#### Parameters:

- `expand` Boolean

### `_unbindDOM`

() protected

Inherited from Widget: `widget/js/Widget.js:933`

### `_unbindUI`

() protected

Inherited from Widget: `widget/js/Widget.js:894`

### `_validateFillHeight`

(

- `val`

)
protected

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:384`

Default validator for the fillHeight attribute. Verifies that the value set is a valid section specifier - one of WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER, or a falsey value if fillHeight is to be disabled.

#### Parameters:

- `val` String

  The section which should be setup to fill height, or false/null to disable fillHeight

#### Returns:

true if valid, false if not

### `_validateXY`

(

- `val`

)
Boolean protected

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:184`

Default validator for the XY attribute

#### Parameters:

- `val` Array

  The XY page co-ordinate value which is being set.

#### Returns:

Boolean: true if valid, false if not.

### `_validTabIndex`

(

- `tabIndex`

)
protected

Inherited from Widget: `widget/js/Widget.js:1161`

#### Parameters:

- `tabIndex` Number

### `addAttr`

(

- `name`
- `config`
- `lazy`

)
Object chainable

Inherited from AttributeCore: `attribute/js/AttributeCore.js:157`

Adds an attribute with the provided configuration to the host object.

The config argument object supports the following properties:

value <Any>
  The initial value to set on the attribute
valueFn <Function | String>

  A function, which will return the initial value to set on the attribute. This is useful for cases where the attribute configuration is defined statically, but needs to reference the host instance ("this") to obtain an initial value. If both the value and valueFn properties are defined, the value returned by the valueFn has precedence over the value property, unless it returns undefined, in which case the value property is used.

  valueFn can also be set to a string, representing the name of the instance method to be used to retrieve the value.

readOnly <boolean>
  Whether or not the attribute is read only. Attributes having readOnly set to true cannot be modified by invoking the set method.
writeOnce <boolean> or <string>
  Whether or not the attribute is "write once". Attributes having writeOnce set to true, can only have their values set once, be it through the default configuration, constructor configuration arguments, or by invoking set.

  The writeOnce attribute can also be set to the string "initOnly", in which case the attribute can only be set during initialization (when used with Base, this means it can only be set during construction)

setter <Function | String>

  The setter function used to massage or normalize the value passed to the set method for the attribute. The value returned by the setter will be the final stored value. Returning Attribute.INVALID_VALUE, from the setter will prevent the value from being stored.

  setter can also be set to a string, representing the name of the instance method to be used as the setter function.

getter <Function | String>

  The getter function used to massage or normalize the value returned by the get method for the attribute. The value returned by the getter function is the value which will be returned to the user when they invoke get.

  getter can also be set to a string, representing the name of the instance method to be used as the getter function.

validator <Function | String>

  The validator function invoked prior to setting the stored value. Returning false from the validator function will prevent the value from being stored.

  validator can also be set to a string, representing the name of the instance method to be used as the validator function.

lazyAdd <boolean>
  Whether or not to delay initialization of the attribute until the first call to get/set it. This flag can be used to over-ride lazy initialization on a per attribute basis, when adding multiple attributes through the addAttrs method.

The setter, getter and validator are invoked with the value and name passed in as the first and second arguments, and with the context ("this") set to the host object.

Configuration properties outside of the list mentioned above are considered private properties used internally by attribute, and are not intended for public use.

#### Parameters:

- `name` String

  The name of the attribute.

- `config` Object

  An object with attribute configuration property/value pairs, specifying the configuration for the attribute.

  NOTE: The configuration object is modified when adding an attribute, so if you need to protect the original values, you will need to merge the object.

- `lazy` Boolean

  (optional) Whether or not to add this attribute lazily (on the first call to get/set).

#### Returns:

Object: A reference to the host object.

### `addAttrs`

(

- `cfgs`
- `values`
- `lazy`

)
Object chainable

Inherited from AttributeCore: `attribute/js/AttributeCore.js:805`

Configures a group of attributes, and sets initial values.

NOTE: This method does not isolate the configuration object by merging/cloning. The caller is responsible for merging/cloning the configuration object if required.

#### Parameters:

- `cfgs` Object

  An object with attribute name/configuration pairs.

- `values` Object

  An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.

- `lazy` Boolean

  Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.

#### Returns:

Object: A reference to the host object.

### `addTarget`

(

- `o`

)

Inherited from EventTarget: `event-custom/js/event-facade.js:455`

Registers another EventTarget as a bubble target. Bubble order is determined by the order registered. Multiple targets can be specified.

Events can only bubble if emitFacade is true.

Included in the event-custom-complex submodule.

#### Parameters:

- `o` EventTarget

  the target to add

### `after`

(

- `type`
- `fn`
- `[context]`
- `[arg*]`

)
EventHandle

Inherited from EventTarget: `event-custom/js/event-target.js:833`

Subscribe to a custom event hosted by this object. The supplied callback will execute after any listeners add via the subscribe method, and after the default function, if configured for the event, has executed.

#### Parameters:

- `type` String

  The name of the event

- `fn` Function

  The callback to execute in response to the event

- `[context]` Object optional

  Override `this` object in callback

- `[arg*]` Any optional

  0..n additional arguments to supply to the subscriber

#### Returns:

EventHandle: A subscription handle capable of detaching the subscription

### `align`

(

- `[node]`
- `[points]`

)
chainable

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:275`

Aligns this widget to the provided `Node` (or viewport) using the provided points. This method can be invoked with no arguments which will cause the widget's current `align` Attribute value to be synced to the DOM.

#### Parameters:

- `[node]` Node | String | Null optional

  A reference (or selector String) for the `Node` which with the widget is to be aligned. If null is passed in, the widget will be aligned with the viewport.

- `[points]` Array2 optional

  A two item array specifying the points on the widget and `Node`/viewport which will to be aligned. The first entry is the point on the widget, and the second entry is the point on the `Node`/viewport. Valid point references are defined as static constants on the `WidgetPositionAlign` extension.

#### Example:

Aligning to the top-left corner of the `<body>`:

    myWidget.align('body',
        [Y.WidgetPositionAlign.TL, Y.WidgetPositionAlign.TR]);

### `ancestor`

(

- `depth`

)
Widget

Inherited from Widget: `widget-child/js/Widget-Child.js:279`

Returns the Widget instance at the specified depth.

#### Parameters:

- `depth` Number

  Number representing the depth of the ancestor.

#### Returns:

Widget: Widget instance.

### `attrAdded`

(

- `name`

)
Boolean

Inherited from AttributeCore: `attribute/js/AttributeCore.js:341`

Checks if the given attribute has been added to the host

#### Parameters:

- `name` String

  The name of the attribute to check.

#### Returns:

Boolean: true if an attribute with the given name has been added, false if it hasn't. This method will return true for lazily added attributes.

### `before`

()

Inherited from EventTarget: `event-custom/js/event-target.js:870`

Executes the callback before a DOM event, custom event or method. If the first argument is a function, it is assumed the target is a method. For DOM and custom events, this is an alias for Y.on.

For DOM and custom events: type, callback, context, 0-n arguments

For methods: callback, object (method host), methodName, context, 0-n arguments

#### Returns:

detach handle

### `bindUI`

() protected

Inherited from Widget: `widget/js/Widget.js:611`

Configures/Sets up listeners to bind Widget State to UI/DOM

This method is not called by framework and is not chained automatically for the class hierarchy.

### `blur`

() chainable

Inherited from Widget: `widget/js/Widget.js:673`

Causes the Widget to lose focus by setting the "focused" attribute to "false"

### `bubble`

(

- `evt`

)
Boolean

Inherited from EventTarget: `event-custom/js/event-facade.js:507`

Propagate an event. Requires the event-custom-complex module.

#### Parameters:

- `evt` CustomEvent

  the custom event to propagate

#### Returns:

Boolean: the aggregated return value from Event.Custom.fire

### `centered`

(

- `[node]`

)
chainable

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:311`

Centers the widget in the viewport, or if a `Node` is passed in, it will be centered to that `Node`.

#### Parameters:

- `[node]` Node | String optional

  A `Node` reference or selector String defining the `Node` which the widget should be centered. If a `Node` is not passed in, then the widget will be centered to the viewport.

### `constrain`

(

- `xy`
- `node`

)

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:128`

Constrains the widget's bounding box to a node (or the viewport). If xy or node are not passed in, the current position and the value of "constrain" will be used respectively.

The widget's position will be changed to the constrained position.

#### Parameters:

- `xy` Array

  Optional. The xy values to constrain

- `node` Node | boolean

  Optional. The node to constrain to, or true for the viewport

### `destroy`

(

- `destroyAllNodes`

)
Widget chainable

Inherited from BaseObservable but overwritten in `widget/js/Widget.js:452`

Destroy lifecycle method. Fires the destroy event, prior to invoking destructors for the class hierarchy. Overrides Base's implementation, to support arguments to destroy

Subscribers to the destroy event can invoke preventDefault on the event object, to prevent destruction from proceeding.

#### Parameters:

- `destroyAllNodes` Boolean

  If true, all nodes contained within the Widget are removed and destroyed. Defaults to false due to potentially high run-time cost.

#### Returns:

Widget: A reference to this object

### `destructor`

() protected

Inherited from Widget: `widget/js/Widget.js:427`

Destructor lifecycle implementation for the Widget class. Purges events attached to the bounding box and content box, removes them from the DOM and removes the Widget from the list of registered widgets.

### `detach`

(

- `type`
- `fn`
- `context`

)
EventTarget

Inherited from EventTarget: `event-custom/js/event-target.js:346`

Detach one or more listeners the from the specified event

#### Parameters:

- `type` String | Object

  Either the handle to the subscriber or the type of event. If the type is not specified, it will attempt to remove the listener from all hosted events.

- `fn` Function

  The subscribed function to unsubscribe, if not supplied, all subscribers will be removed.

- `context` Object

  The custom object passed to subscribe. This is optional, but if supplied will be used to disambiguate multiple listeners that are the same (e.g., you subscribe many object using a function that lives on the prototype)

#### Returns:

EventTarget: the host

### `detachAll`

(

- `type`

)

Inherited from EventTarget: `event-custom/js/event-target.js:469`

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

#### Parameters:

- `type` String

  The type, or name of the event

### `disable`

() chainable

Inherited from Widget: `widget/js/Widget.js:692`

Set the Widget's "disabled" attribute to "true".

### `enable`

() chainable

Inherited from Widget: `widget/js/Widget.js:683`

Set the Widget's "disabled" attribute to "false".

### `enable or disable constraints listeners`

(

- `enable`

)
private

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:287`

Updates the UI if enabling constraints, and sets up the xyChange event listeners to constrain whenever the widget is moved. Disabling constraints removes the listeners.

#### Parameters:

- `enable` Boolean

  Enable or disable constraints

### `fillHeight`

(

- `node`

)

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:712`

Sets the height on the provided header, body or footer element to fill out the height of the Widget. It determines the height of the widgets bounding box, based on it's configured height value, and sets the height of the provided section to fill out any space remaining after the other standard module section heights have been accounted for.

NOTE: This method is not designed to work if an explicit height has not been set on the Widget, since for an "auto" height Widget, the heights of the header/body/footer will drive the height of the Widget.

#### Parameters:

- `node` Node

  The node which should be resized to fill out the height of the Widget bounding box. Should be a standard module section node which belongs to the widget.

### `fire`

(

- `type`
- `arguments`

)
EventTarget

Inherited from EventTarget: `event-custom/js/event-target.js:695`

Fire a custom event by name. The callback functions will be executed from the context specified when the event was created, and with the following parameters.

If the custom event object hasn't been created, then the event hasn't been published and it has no subscribers. For performance sake, we immediate exit in this case. This means the event won't bubble, so if the intention is that a bubble target be notified, the event must be published on this object first.

The first argument is the event type, and any additional arguments are passed to the listeners as parameters. If the first of these is an object literal, and the event is configured to emit an event facade, that object is mixed into the event facade and the facade is provided in place of the original object.

#### Parameters:

- `type` String | Object

  The type of the event, or an object that contains a 'type' property.

- `arguments` Object*

  an arbitrary set of parameters to pass to the handler. If the first of these is an object literal and the event is configured to emit an event facade, the event facade will replace that parameter after the properties the object literal contains are copied to the event facade.

#### Returns:

EventTarget: the event host

### `focus`

() chainable

Inherited from Widget: `widget/js/Widget.js:663`

Causes the Widget to receive the focus by setting the "focused" attribute to "true".

### `get`

(

- `name`

)
Any

Inherited from AttributeCore: `attribute/js/AttributeCore.js:353`

Returns the current value of the attribute. If the attribute has been configured with a 'getter' function, this method will delegate to the 'getter' to obtain the value of the attribute.

#### Parameters:

- `name` String

  The name of the attribute. If the value of the attribute is an Object, dot notation can be used to obtain the value of a property of the object (e.g. `get("x.y.z")`)

#### Returns:

Any: The value of the attribute

### `getAttrs`

(

- `attrs`

)
Object

Inherited from AttributeCore: `attribute/js/AttributeCore.js:762`

Gets multiple attribute values.

#### Parameters:

- `attrs` Array | boolean

  Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

#### Returns:

Object: An object with attribute name/value pairs.

### `getClassName`

(

- `args`

)

Inherited from Widget but overwritten in `widget/js/Widget.js:309`

Generate a standard prefixed classname for the Widget, prefixed by the default prefix defined by the `Y.config.classNamePrefix` attribute used by `ClassNameManager` and `Widget.NAME.toLowerCase()` (e.g. "yui-widget-xxxxx-yyyyy", based on default values for the prefix and widget class name).

The instance based version of this method can be used to generate standard prefixed classnames, based on the instances NAME, as opposed to Widget.NAME. This method should be used when you need to use a constant class name across different types instances.

#### Parameters:

- `args` String* multiple

  0..n strings which should be concatenated, using the default separator defined by ClassNameManager, to create the class name

### `getConstrainedXY`

(

- `xy`
- `node`

)
Array

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:106`

Calculates the constrained positions for the XY positions provided, using the provided node argument is passed in. If no node value is passed in, the value of the "constrain" attribute is used.

#### Parameters:

- `xy` Array

  The xy values to constrain

- `node` Node | boolean

  Optional. The node to constrain to, or true for the viewport

#### Returns:

Array: The constrained xy values

### `getDefaultLocale`

() String

Inherited from Widget: `widget/js/WidgetLocale.js:153`

Returns the default locale for the widget (the locale value defined by the widget class, or provided by the user during construction).

#### Returns:

String: The default locale for the widget

### `getEvent`

(

- `type`
- `prefixed`

)
CustomEvent

Inherited from EventTarget: `event-custom/js/event-target.js:814`

Returns the custom event of the provided type has been created, a falsy value otherwise

#### Parameters:

- `type` String

  the type, or name of the event

- `prefixed` String

  if true, the type is prefixed already

#### Returns:

CustomEvent: the custom event or null

### `getSkinName`

(

- `[skinPrefix]`

)
String

Inherited from Widget: `widget/js/WidgetSkin.js:12`

Returns the name of the skin that's currently applied to the widget.

Searches up the Widget's ancestor axis for, by default, a class yui3-skin-(name), and returns the (name) portion. Otherwise, returns null.

This is only really useful after the widget's DOM structure is in the document, either by render or by progressive enhancement.

#### Parameters:

- `[skinPrefix]` String optional

  The prefix which the implementation uses for the skin ("yui3-skin-" is the default).

  NOTE: skinPrefix will be used as part of a regular expression:

      new RegExp('\\b' + skinPrefix + '(\\S+)')

  Although an unlikely use case, literal characters which may result in an invalid regular expression should be escaped.

#### Returns:

String: The name of the skin, or null, if a matching skin class is not found.

### `getStdModNode`

(

- `section`
- `forceCreate`

)
Node

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:686`

Returns the node reference for the specified `section`.

Note: The DOM is not queried for the node reference. The reference stored by the widget instance is returned if it was set. Passing a truthy for `forceCreate` will create the section node if it does not already exist.

#### Parameters:

- `section` String

  The section whose node reference is required. Either `WidgetStdMod.HEADER`, `WidgetStdMod.BODY`, or `WidgetStdMod.FOOTER`.

- `forceCreate` Boolean

  Whether the section node should be created if it does not already exist.

#### Returns:

Node: The node reference for the `section`, or null if not set.

### `getString`

(

- `key`

)
String deprecated

Inherited from Widget but overwritten in `widget/js/Widget.js:1225`

Deprecated: Used by deprecated WidgetLocale implementations.

Helper method to get a specific string value

#### Parameters:

- `key` String

#### Returns:

String: The string

### `getStrings`

(

- `key`

)
String deprecated

Inherited from Widget but overwritten in `widget/js/Widget.js:1237`

Deprecated: Used by deprecated WidgetLocale implementations.

Helper method to get the complete set of strings for the widget

#### Parameters:

- `key` String

#### Returns:

String: The strings

### `getTargets`

()

Inherited from EventTarget: `event-custom/js/event-facade.js:479`

Returns an array of bubble targets for this object.

#### Returns:

EventTarget[]

### `hide`

() chainable

Inherited from Widget: `widget/js/Widget.js:645`

Hides the Widget by setting the "visible" attribute to "false".

### `init`

(

- `cfg`

)
BaseCore chainable

Inherited from BaseObservable but overwritten in `base/js/BaseCore.js:264`

Init lifecycle method, invoked during construction. Sets up attributes and invokes initializers for the class hierarchy.

#### Parameters:

- `cfg` Object

  Object with configuration property name/value pairs

#### Returns:

BaseCore: A reference to this object

### `initializer`

(

- `config`

)
protected

Inherited from Widget: `widget/js/Widget.js:380`

Initializer lifecycle implementation for the Widget class. Registers the widget instance, and runs through the Widget's HTML_PARSER definition.

#### Parameters:

- `config` Object

  Configuration object literal for the widget

### `isRoot`

() Boolean

Inherited from Widget: `widget-child/js/Widget-Child.js:267`

Determines if the Widget is the root Widget in the object hierarchy.

#### Returns:

Boolean: Boolean indicating if Widget is the root Widget in the object hierarchy.

### `modifyAttr`

(

- `name`
- `config`

)

Inherited from AttributeExtras: `attribute/js/AttributeExtras.js:40`

Updates the configuration of an attribute which has already been added.

The properties which can be modified through this interface are limited to the following subset of attributes, which can be safely modified after a value has already been set on the attribute: readOnly, writeOnce, broadcast and getter.

#### Parameters:

- `name` String

  The name of the attribute whose configuration is to be updated.

- `config` Object

  An object with configuration property/value pairs, specifying the configuration properties to modify.

### `move`

(

- `x`
- `y`
- `x,`

)

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:157`

Moves the Widget to the specified page xy co-ordinate position.

#### Parameters:

- `x` Number

  The new x position

- `y` Number

  The new y position

  Or

- `x,` Array

  y values passed as an array ([x, y]), to support simple pass through of Node.getXY results

### `next`

(

- `circular`

)
Widget

Inherited from Widget: `widget-child/js/Widget-Child.js:191`

Returns the Widget's next sibling.

#### Parameters:

- `circular` Boolean

  Boolean indicating if the parent's first child should be returned if the child has no next sibling.

#### Returns:

Widget: Widget instance.

### `on`

(

- `type`
- `fn`
- `[context]`
- `[arg*]`

)
EventHandle

Inherited from EventTarget: `event-custom/js/event-target.js:188`

Subscribe a callback function to a custom event fired by this object or from an object that bubbles its events to this object.

Callback functions for events published with `emitFacade = true` will receive an `EventFacade` as the first argument (typically named "e"). These callbacks can then call `e.preventDefault()` to disable the behavior published to that event's `defaultFn`. See the `EventFacade` API for all available properties and methods. Subscribers to non-`emitFacade` events will receive the arguments passed to `fire()` after the event name.

To subscribe to multiple events at once, pass an object as the first argument, where the key:value pairs correspond to the eventName:callback, or pass an array of event names as the first argument to subscribe to all listed events with the same callback.

Returning `false` from a callback is supported as an alternative to calling `e.preventDefault(); e.stopPropagation();`. However, it is recommended to use the event methods whenever possible.

#### Parameters:

- `type` String

  The name of the event

- `fn` Function

  The callback to execute in response to the event

- `[context]` Object optional

  Override `this` object in callback

- `[arg*]` Any optional

  0..n additional arguments to supply to the subscriber

#### Returns:

EventHandle: A subscription handle capable of detaching that subscription

### `once`

(

- `type`
- `fn`
- `[context]`
- `[arg*]`

)
EventHandle

Inherited from EventTarget: `event-custom/js/event-target.js:124`

Listen to a custom event hosted by this object one time. This is the equivalent to `on` except the listener is immediatelly detached when it is executed.

#### Parameters:

- `type` String

  The name of the event

- `fn` Function

  The callback to execute in response to the event

- `[context]` Object optional

  Override `this` object in callback

- `[arg*]` Any optional

  0..n additional arguments to supply to the subscriber

#### Returns:

EventHandle: A subscription handle capable of detaching the subscription

### `onceAfter`

(

- `type`
- `fn`
- `[context]`
- `[arg*]`

)
EventHandle

Inherited from EventTarget: `event-custom/js/event-target.js:146`

Listen to a custom event hosted by this object one time. This is the equivalent to `after` except the listener is immediatelly detached when it is executed.

#### Parameters:

- `type` String

  The name of the event

- `fn` Function

  The callback to execute in response to the event

- `[context]` Object optional

  Override `this` object in callback

- `[arg*]` Any optional

  0..n additional arguments to supply to the subscriber

#### Returns:

EventHandle: A subscription handle capable of detaching that subscription

### `parseType`

(

- `type`
- `[pre=this._yuievt.config.prefix]`

)
Array

Inherited from EventTarget: `event-custom/js/event-target.js:168`

Available since 3.3.0

Takes the type parameter passed to 'on' and parses out the various pieces that could be included in the type. If the event type is passed without a prefix, it will be expanded to include the prefix one is supplied or the event target is configured with a default prefix.

#### Parameters:

- `type` String

  the type

- `[pre=this._yuievt.config.prefix]` String optional

  the prefix

#### Returns:

Array: an array containing: * the detach category, if supplied, * the prefixed event type, * whether or not this is an after listener, * the supplied event type

### `previous`

(

- `circular`

)
Widget

Inherited from Widget: `widget-child/js/Widget-Child.js:216`

Returns the Widget's previous sibling.

#### Parameters:

- `circular` Boolean

  Boolean indicating if the parent's last child should be returned if the child has no previous sibling.

#### Returns:

Widget: Widget instance.

### `publish`

(

- `type`
- `opts`

)
CustomEvent

Inherited from EventTarget: `event-custom/js/event-target.js:493`

Creates a new custom event of the specified type. If a custom event by that name already exists, it will not be re-created. In either case the custom event is returned.

#### Parameters:

- `type` String

  the type, or name of the event

- `opts` Object

  optional config params. Valid properties are:

  - 'broadcast': whether or not the YUI instance and YUI global are notified when the event is fired (false)
  - 'bubbles': whether or not this event bubbles (true) Events can only bubble if emitFacade is true.
  - 'context': the default execution context for the listeners (this)
  - 'defaultFn': the default function to execute when this event fires if preventDefault was not called
  - 'emitFacade': whether or not this event emits a facade (false)
  - 'prefix': the prefix for this targets events, e.g., 'menu' in 'menu:click'
  - 'fireOnce': if an event is configured to fire once, new subscribers after the fire will be notified immediately.
  - 'async': fireOnce event listeners will fire synchronously if the event has already fired unless async is true.
  - 'preventable': whether or not preventDefault() has an effect (true)
  - 'preventedFn': a function that is executed when preventDefault is called
  - 'queuable': whether or not this event can be queued during bubbling (false)
  - 'silent': if silent is true, debug messages are not provided for this event.
  - 'stoppedFn': a function that is executed when stopPropagation is called

  - 'monitored': specifies whether or not this event should send notifications about when the event has been attached, detached, or published.
  - 'type': the event type (valid option if not provided as the first parameter to publish)

#### Returns:

CustomEvent: the custom event

### `removeAttr`

(

- `name`

)

Inherited from AttributeExtras: `attribute/js/AttributeExtras.js:79`

Removes an attribute from the host object

#### Parameters:

- `name` String

  The name of the attribute to be removed.

### `removeTarget`

(

- `o`

)

Inherited from EventTarget: `event-custom/js/event-facade.js:489`

Removes a bubble target

#### Parameters:

- `o` EventTarget

  the target to remove

### `render`

(

- `parentNode`

)
final chainable

Inherited from Widget: `widget/js/Widget.js:513`

Establishes the initial DOM for the widget. Invoking this method will lead to the creating of all DOM elements for the widget (or the manipulation of existing DOM elements for the progressive enhancement use case).

This method should only be invoked once for an initialized widget.

It delegates to the widget specific renderer method to do the actual work.

#### Parameters:

- `parentNode` Object | String

  Optional. The Node under which the Widget is to be rendered. This can be a Node instance or a CSS selector string.

  If the selector string returns more than one Node, the first node will be used as the parentNode. NOTE: This argument is required if both the boundingBox and contentBox are not currently in the document. If it's not provided, the Widget will be rendered to the body of the current document in this case.

### `renderer`

() protected

Inherited from Widget: `widget/js/Widget.js:588`

Creates DOM (or manipulates DOM for progressive enhancement) This method is invoked by render() and is not chained automatically for the class hierarchy (unlike initializer, destructor) so it should be chained manually for subclasses if required.

### `renderUI`

() protected

Inherited from Widget: `widget/js/Widget.js:622`

Adds nodes to the DOM

This method is not called by framework and is not chained automatically for the class hierarchy.

### `reset`

(

- `name`

)
Object chainable

Inherited from AttributeExtras: `attribute/js/AttributeExtras.js:89`

Resets the attribute (or all attributes) to its initial value, as long as the attribute is not readOnly, or writeOnce.

#### Parameters:

- `name` String

  Optional. The name of the attribute to reset. If omitted, all attributes are reset.

#### Returns:

Object: A reference to the host object.

### `set`

(

- `name`
- `value`
- `[opts]`

)
Object chainable

Inherited from AttributeObservable but overwritten in `attribute/js/AttributeCore.js:410`

Sets the value of an attribute.

#### Parameters:

- `name` String

  The name of the attribute. If the current value of the attribute is an Object, dot notation can be used to set the value of a property within the object (e.g. `set("x.y.z", 5)`).

- `value` Any

  The value to set the attribute to.

- `[opts]` Object optional

  Optional data providing the circumstances for the change.

#### Returns:

Object: A reference to the host object.

### `setAttrs`

(

- `attrs`
- `[opts]`

)
Object chainable

Inherited from AttributeObservable but overwritten in `attribute/js/AttributeCore.js:729`

Sets multiple attribute values.

#### Parameters:

- `attrs` Object

  An object with attributes name/value pairs.

- `[opts]` Object optional

  Optional data providing the circumstances for the change.

#### Returns:

Object: A reference to the host object.

### `setStdModContent`

(

- `section`
- `content`
- `where`

)

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:668`

Updates the body section of the standard module with the content provided (either an HTML string, or node reference).

This method can be used instead of the corresponding section content attribute if you'd like to retain the current content of the section, and insert content before or after it, by specifying the `where` argument.

#### Parameters:

- `section` String

  The standard module section whose content is to be updated. Either WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER.

- `content` String | Node

  The content to be added, either an HTML string or a Node reference.

- `where` String

  Optional. Either WidgetStdMod.AFTER, WidgetStdMod.BEFORE or WidgetStdMod.REPLACE. If not provided, the content will replace existing content in the section.

### `show`

() chainable

Inherited from Widget: `widget/js/Widget.js:654`

Shows the Widget by setting the "visible" attribute to "true".

### `sizeShim`

()

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:404`

For IE6, synchronizes the size and position of iframe shim to that of Widget bounding box which it is protecting. For all other browsers, this method does not do anything.

### `subscribe`

() deprecated

Inherited from EventTarget: `event-custom/js/event-target.js:336`

Deprecated: use on

subscribe to an event

### `syncUI`

() protected

Inherited from Widget: `widget/js/Widget.js:633`

Refreshes the rendered UI, based on Widget State

This method is not called by framework and is not chained automatically for the class hierarchy.

### `syncXY`

()

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:174`

Synchronizes the Panel's "xy", "x", and "y" properties with the Widget's position in the DOM.

### `toString`

() String

Inherited from BaseCore but overwritten in `widget/js/Widget.js:1107`

Generic toString implementation for all widgets.

#### Returns:

String: The default string value for the widget [ displays the NAME of the instance, and the unique id ]

### `unsubscribe`

() deprecated

Inherited from EventTarget: `event-custom/js/event-target.js:459`

Deprecated: use detach

detach a listener

### `unsubscribeAll`

(

- `type`

)
deprecated

Inherited from EventTarget: `event-custom/js/event-target.js:480`

Deprecated: use detachAll

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

#### Parameters:

- `type` String

  The type, or name of the event

## Properties

### `_allowAdHocAttrs`

Boolean protected

Inherited from BaseCore: `base/js/BaseCore.js:100`

This property controls whether or not instances of this class should allow users to add ad-hoc attributes through the constructor configuration hash.

AdHoc attributes are attributes which are not defined by the class, and are not handled by the MyClass.NONATTRS_CFG

Default: undefined (false)

### `_posAlignUIHandles`

Array protected

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:222`

Holds the alignment-syncing event handles.

Default: null

### `_UI_ATTRS`

Object private

Inherited from Widget: `widget/js/Widget.js:1249`

The lists of UI attributes to bind and sync for widget's _bindUI and _syncUI implementations

### `BOUNDING_TEMPLATE`

String

Inherited from Widget: `widget/js/Widget.js:1145`

Property defining the markup template for bounding box.

### `CONTENT_TEMPLATE`

String

Inherited from Widget: `widget/js/Widget.js:1135`

Property defining the markup template for content box. If your Widget doesn't need the dual boundingBox/contentBox structure, set CONTENT_TEMPLATE to null, and contentBox and boundingBox will both point to the same Node.

### `DEF_PARENT_NODE`

String | Node

Inherited from Widget: `widget/js/Widget.js:1126`

Default node to render the bounding box to. If not set, will default to the current document body.

### `DEF_UNIT`

String

Inherited from Widget: `widget/js/Widget.js:1118`

Default unit to use for dimension values

### `name`

String deprecated

Inherited from BaseCore: `base/js/BaseCore.js:242`

Deprecated: Use this.constructor.NAME

The string used to identify the class of this object.

### `UI_EVENTS`

Object

Inherited from Widget: `widget/js/WidgetUIEvents.js:52`

Map of DOM events that should be fired as Custom Events by the Widget instance.

## Attributes

### `align`

Object

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:48`

The alignment configuration for this widget.

The `align` attribute is used to align a reference point on the widget, with the reference point on another `Node`, or the viewport. The object which `align` expects has the following properties:

- `node`: The `Node` to which the widget is to be aligned. If set to `null`, or not provided, the widget is aligned to the viewport.

- `points`: A two element Array, defining the two points on the widget and `Node`/viewport which are to be aligned. The first element is the point on the widget, and the second element is the point on the `Node`/viewport. Supported alignment points are defined as static properties on `WidgetPositionAlign`.

Default: null

#### Fires event `alignChange`

Fires when the value for the configuration attribute `align` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

#### Example:

Aligns the top-right corner of the widget with the top-left corner of the viewport:

    myWidget.set('align', {
        points: [Y.WidgetPositionAlign.TR, Y.WidgetPositionAlign.TL]
    });

### `alignOn`

Array

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:97`

An Array of Objects corresponding to the `Node`s and events that will cause the alignment of this widget to be synced to the DOM.

The `alignOn` Attribute is expected to be an Array of Objects with the following properties:

- `eventName`: The String event name to listen for.

- `node`: The optional `Node` that will fire the event, it can be a `Node` reference or a selector String. This will default to the widget's `boundingBox`.

Default: []

#### Fires event `alignOnChange`

Fires when the value for the configuration attribute `alignOn` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

#### Example:

Sync this widget's alignment on window resize:

    myWidget.set('alignOn', [
        {
            node     : Y.one('win'),
            eventName: 'resize'
        }
    ]);

### `bodyContent`

HTML

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:171`

The content to be added to the body section. This will replace any existing content in the body. If you want to append, or insert new content, use the setStdModContent method.

Default: undefined

#### Fires event `bodyContentChange`

Fires when the value for the configuration attribute `bodyContent` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `boundingBox`

String | Node

Inherited from Widget: `widget/js/Widget.js:175`

The outermost DOM node for the Widget, used for sizing and positioning of a Widget as well as a containing element for any decorator elements used for skinning.

#### Fires event `boundingBoxChange`

Fires when the value for the configuration attribute `boundingBox` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `centered`

Boolean | Node

Inherited from WidgetPositionAlign: `widget-position-align/js/Widget-PositionAlign.js:79`

A convenience Attribute, which can be used as a shortcut for the `align` Attribute.

If set to `true`, the widget is centered in the viewport. If set to a `Node` reference or valid selector String, the widget will be centered within the `Node`. If set to `false`, no center positioning is applied.

Default: false

#### Fires event `centeredChange`

Fires when the value for the configuration attribute `centered` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `constrain`

Boolean | Node

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:56`

The node to constrain the widget's bounding box to, when setting xy. Can also be set to true, to constrain to the viewport.

Default: null

#### Fires event `constrainChange`

Fires when the value for the configuration attribute `constrain` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `contentBox`

String | Node

Inherited from Widget: `widget/js/Widget.js:189`

A DOM node that is a direct descendant of a Widget's bounding box that houses its content.

#### Fires event `contentBoxChange`

Fires when the value for the configuration attribute `contentBox` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `destroyed`

Boolean readonly

Inherited from BaseCore: `base/js/BaseCore.js:157`

Flag indicating whether or not this object has been through the destroy lifecycle phase.

Default: false

#### Fires event `destroyedChange`

Fires when the value for the configuration attribute `destroyed` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `disabled`

Boolean

Inherited from Widget: `widget/js/Widget.js:231`

Boolean indicating if the Widget should be disabled. The disabled implementation is left to the specific classes extending widget.

Default: false

#### Fires event `disabledChange`

Fires when the value for the configuration attribute `disabled` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `fillHeight`

String

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:182`

The section (WidgetStdMod.HEADER, WidgetStdMod.BODY or WidgetStdMod.FOOTER) which should be resized to fill the height of the standard module, when a height is set on the Widget. If a height is not set on the widget, then all sections are sized based on their content.

Default: WidgetStdMod.BODY

#### Fires event `fillHeightChange`

Fires when the value for the configuration attribute `fillHeight` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `focused`

Boolean readonly

Inherited from Widget: `widget/js/Widget.js:218`

Boolean indicating if the Widget, or one of its descendants, has focus.

Default: false

#### Fires event `focusedChange`

Fires when the value for the configuration attribute `focused` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `footerContent`

HTML

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:160`

The content to be added to the footer section. This will replace any existing content in the footer. If you want to append, or insert new content, use the setStdModContent method.

Default: undefined

#### Fires event `footerContentChange`

Fires when the value for the configuration attribute `footerContent` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `headerContent`

HTML

Inherited from WidgetStdMod: `widget-stdmod/js/Widget-StdMod.js:149`

The content to be added to the header section. This will replace any existing content in the header. If you want to append, or insert new content, use the setStdModContent method.

Default: undefined

#### Fires event `headerContentChange`

Fires when the value for the configuration attribute `headerContent` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `height`

String | Number

Inherited from Widget: `widget/js/Widget.js:252`

String with units, or number, representing the height of the Widget. If a number is provided, the default unit, defined by the Widgets DEF_UNIT, property is used.

Default: EMPTY_STR

#### Fires event `heightChange`

Fires when the value for the configuration attribute `height` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `id`

String

Inherited from Widget: `widget/js/Widget.js:149`

Default: Generated using guid()

#### Fires event `idChange`

Fires when the value for the configuration attribute `id` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `initialized`

Boolean readonly

Inherited from BaseCore: `base/js/BaseCore.js:143`

Flag indicating whether or not this object has been through the init lifecycle phase.

Default: false

#### Fires event `initializedChange`

Fires when the value for the configuration attribute `initialized` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `locale`

String deprecated

Inherited from Widget: `widget/js/WidgetLocale.js:17`

Deprecated: Use Y.config.lang and Y.Intl externalization support

The default locale for the widget. NOTE: Using get/set on the "strings" attribute will return/set strings for this locale.

Default: "en"

#### Fires event `localeChange`

Fires when the value for the configuration attribute `locale` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `preventOverlap`

Boolean

Inherited from WidgetPositionConstrain: `widget-position-constrain/js/Widget-PositionConstrain.js:68`

If set to true, and WidgetPositionAlign is also added to the Widget, constrained positioning will attempt to prevent the widget's bounding box from overlapping the element to which it has been aligned, by flipping the orientation of the alignment for corner based alignments

#### Fires event `preventOverlapChange`

Fires when the value for the configuration attribute `preventOverlap` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `render`

Boolean | Node

Inherited from Widget: `widget/js/Widget.js:286`

Whether or not to render the widget automatically after init, and optionally, to which parent node.

#### Fires event `renderChange`

Fires when the value for the configuration attribute `render` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `rendered`

Boolean readonly

Inherited from Widget: `widget/js/Widget.js:161`

Flag indicating whether or not this Widget has been through the render lifecycle phase.

Default: false

#### Fires event `renderedChange`

Fires when the value for the configuration attribute `rendered` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `shim`

Boolean

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:74`

Boolean flag to indicate whether or not a shim should be added to the Widgets boundingBox, to protect it from select box bleedthrough.

Default: false, for all browsers other than IE6, for which a shim is enabled by default.

#### Fires event `shimChange`

Fires when the value for the configuration attribute `shim` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `srcNode`

String | Node

Inherited from Widget: `widget/js/WidgetHTMLParser.js:58`

The DOM node to parse for configuration values, passed to the Widget's HTML_PARSER definition

#### Fires event `srcNodeChange`

Fires when the value for the configuration attribute `srcNode` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `strings`

Object

Inherited from Widget: `widget/js/Widget.js:274`

Collection of strings used to label elements of the Widget's UI.

Default: null

#### Fires event `stringsChange`

Fires when the value for the configuration attribute `strings` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `tabIndex`

Number

Inherited from Widget: `widget/js/Widget.js:202`

Number (between -32767 to 32767) indicating the widget's position in the default tab flow. The value is used to set the "tabIndex" attribute on the widget's bounding box. Negative values allow the widget to receive DOM focus programmatically (by calling the focus method), while being removed from the default tab flow. A value of null removes the "tabIndex" attribute from the widget's bounding box.

Default: null

#### Fires event `tabIndexChange`

Fires when the value for the configuration attribute `tabIndex` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `visible`

Boolean

Inherited from Widget: `widget/js/Widget.js:242`

Boolean indicating whether or not the Widget is visible.

Default: TRUE

#### Fires event `visibleChange`

Fires when the value for the configuration attribute `visible` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `width`

String | Number

Inherited from Widget: `widget/js/Widget.js:263`

String with units, or number, representing the width of the Widget. If a number is provided, the default unit, defined by the Widgets DEF_UNIT, property is used.

Default: EMPTY_STR

#### Fires event `widthChange`

Fires when the value for the configuration attribute `width` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `x`

Number

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:50`

Page X co-ordinate for the widget. This attribute acts as a facade for the xy attribute. Changes in position can be monitored by listening for xyChange events.

Default: 0

#### Fires event `xChange`

Fires when the value for the configuration attribute `x` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `xy`

Array

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:86`

Page XY co-ordinate pair for the widget.

Default: [0,0]

#### Fires event `xyChange`

Fires when the value for the configuration attribute `xy` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `y`

Number

Inherited from WidgetPosition: `widget-position/js/Widget-Position.js:68`

Page Y co-ordinate for the widget. This attribute acts as a facade for the xy attribute. Changes in position can be monitored by listening for xyChange events.

Default: 0

#### Fires event `yChange`

Fires when the value for the configuration attribute `y` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

### `zIndex`

Number

Inherited from WidgetStack: `widget-stack/js/Widget-Stack.js:86`

The z-index to apply to the Widgets boundingBox. Non-numerical values for zIndex will be converted to 0

Default: 0

#### Fires event `zIndexChange`

Fires when the value for the configuration attribute `zIndex` is changed. You can listen for the event using the `on` method if you wish to be notified before the attribute's value has changed, or using the `after` method if you wish to be notified after the attribute's value has changed.

#### Parameters:

- `e` EventFacade
  An Event Facade object with the following attribute-specific properties added:
  - `prevVal` Any
    The value of the attribute, prior to it being set.
  - `newVal` Any
    The value the attribute is to be set to.
  - `attrName` String
    The name of the attribute being set.
  - `subAttrName` String
    If setting a property within the attribute's value, the name of the sub-attribute property being set.

## Events

### `destroy`

Inherited from BaseObservable: `base/js/BaseObservable.js:151`

Lifecycle event for the destroy phase, fired prior to destruction. Invoking the preventDefault method on the event object provided to subscribers will prevent destruction from proceeding.

Subscribers to the "after" moment of this event, will be notified after destruction is complete (and as a result cannot prevent destruction).

#### Event Payload:

- `e` EventFacade

  Event object

### `init`

Inherited from BaseObservable: `base/js/BaseObservable.js:62`

Lifecycle event for the init phase, fired prior to initialization. Invoking the preventDefault() method on the event object provided to subscribers will prevent initialization from occuring.

Subscribers to the "after" momemt of this event, will be notified after initialization of the object is complete (and therefore cannot prevent initialization).

#### Event Payload:

- `e` EventFacade

  Event object, with a cfg property which refers to the configuration object passed to the constructor.

### `render`

Inherited from Widget: `widget/js/Widget.js:543`

Lifecycle event for the render phase, fired prior to rendering the UI for the widget (prior to invoking the widget's renderer method).

Subscribers to the "on" moment of this event, will be notified before the widget is rendered.

Subscribers to the "after" moment of this event, will be notified after rendering is complete.

#### Event Payload:

- `e` EventFacade

  The Event Facade

### `widget:contentUpdate`

Inherited from Widget: `widget/js/Widget.js:397`

Notification event, which widget implementations can fire, when they change the content of the widget. This event has no default behavior and cannot be prevented, so the "on" or "after" moments are effectively equivalent (with on listeners being invoked before after listeners).

#### Event Payload:

- `e` EventFacade

  The Event Facade