SegmentedBarItem

Defined in: ui/segmented-bar/index.d.ts:13

Represents a SegmentedBar item.

Ns View ​

SegmentedBarItem

Extends ​

• ViewBase

Constructors ​

Constructor ​

new SegmentedBarItem(): SegmentedBarItem;

Defined in: ui/core/view-base/index.ts

Returns ​

SegmentedBarItem

Inherited from ​

ViewBase.constructor

Properties ​

_automaticallyAdjustsScrollViewInsets ​

_automaticallyAdjustsScrollViewInsets: boolean;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._automaticallyAdjustsScrollViewInsets

_context ​

_context: any;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._context

_cssState ​

_cssState: CssState;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._cssState

_defaultPaddingBottom ​

protected _defaultPaddingBottom: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._defaultPaddingBottom

_defaultPaddingLeft ​

protected _defaultPaddingLeft: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._defaultPaddingLeft

_defaultPaddingRight ​

protected _defaultPaddingRight: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._defaultPaddingRight

_defaultPaddingTop ​

protected _defaultPaddingTop: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._defaultPaddingTop

_domId ​

_domId: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._domId

_ignoreFlexMinWidthHeightReset ​

_ignoreFlexMinWidthHeightReset: boolean;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._ignoreFlexMinWidthHeightReset

_isAddedToNativeVisualTree ​

_isAddedToNativeVisualTree: boolean;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._isAddedToNativeVisualTree

_isPaddingRelative ​

protected _isPaddingRelative: boolean;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._isPaddingRelative

_isStyleScopeHost ​

_isStyleScopeHost: boolean;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._isStyleScopeHost

_oldBottom ​

_oldBottom: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._oldBottom

_oldLeft ​

_oldLeft: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._oldLeft

_oldRight ​

_oldRight: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._oldRight

_oldTop ​

_oldTop: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._oldTop

_styleScope ​

_styleScope: StyleScope;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase._styleScope

_suspendNativeUpdatesCount ​

_suspendNativeUpdatesCount: number;

Defined in: ui/core/view-base/index.ts

Determines the depth of suspended updates. When the value is 0 the current property updates are not batched nor scoped and must be immediately applied. If the value is 1 or greater, the current updates are batched and does not have to provide immediate update. Do not set this field, the _batchUpdate method is responsible to keep the count up to date, as well as adding/rmoving the view to/from the visual tree.

Inherited from ​

ViewBase._suspendNativeUpdatesCount

alignSelf ​

alignSelf: AlignSelf;

Defined in: ui/core/view-base/index.ts

(Android-only) Overrides the alignItems value for the child.

Ns Property ​

Inherited from ​

ViewBase.alignSelf

bindingContext ​

bindingContext: any;

Defined in: ui/core/view-base/index.ts

Ns Property ​

Inherited from ​

ViewBase.bindingContext

className ​

className: string;

Defined in: ui/core/view-base/index.ts

Gets or sets the CSS class name for this view.

Ns Property ​

Inherited from ​

ViewBase.className

col ​

col: number;

Defined in: ui/core/view-base/index.ts

The column for the element. The columns are 0-indexed, so the first column is indicated by 0.

Ns Property ​

Inherited from ​

ViewBase.col

colSpan ​

colSpan: number;

Defined in: ui/core/view-base/index.ts

The number of columns for the element to span across.

Ns Property ​

Inherited from ​

ViewBase.colSpan

column ​

column: number;

Defined in: ui/core/view-base/index.ts

The column for the element. The columns are 0-indexed, so the first column is indicated by 0.

Ns Property ​

Inherited from ​

ViewBase.column

columnSpan ​

columnSpan: number;

Defined in: ui/core/view-base/index.ts

Ns Property ​

Inherited from ​

ViewBase.columnSpan

cssClasses ​

readonly cssClasses: Set<string>;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.cssClasses

cssPseudoClasses ​

readonly cssPseudoClasses: Set<string>;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.cssPseudoClasses

defaultVisualState ​

defaultVisualState: string;

Defined in: ui/core/view-base/index.ts

Default visual state, defaults to 'normal'

Ns Property ​

Inherited from ​

ViewBase.defaultVisualState

dock ​

dock: "left" | "right" | "top" | "bottom";

Defined in: ui/core/view-base/index.ts

Dock position of the view within its parent.

Ns Property ​

Inherited from ​

ViewBase.dock

domNode ​

domNode: DOMNode;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.domNode

effectiveBorderBottomWidth ​

effectiveBorderBottomWidth: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveBorderBottomWidth

effectiveBorderLeftWidth ​

effectiveBorderLeftWidth: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveBorderLeftWidth

effectiveBorderRightWidth ​

effectiveBorderRightWidth: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveBorderRightWidth

effectiveBorderTopWidth ​

effectiveBorderTopWidth: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveBorderTopWidth

effectiveHeight ​

effectiveHeight: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveHeight

effectiveLeft ​

effectiveLeft: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveLeft

effectiveMarginBottom ​

effectiveMarginBottom: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveMarginBottom

effectiveMarginLeft ​

effectiveMarginLeft: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveMarginLeft

effectiveMarginRight ​

effectiveMarginRight: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveMarginRight

effectiveMarginTop ​

effectiveMarginTop: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveMarginTop

effectiveMinHeight ​

effectiveMinHeight: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveMinHeight

effectiveMinWidth ​

effectiveMinWidth: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveMinWidth

effectiveTop ​

effectiveTop: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveTop

effectiveWidth ​

effectiveWidth: number;

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.effectiveWidth

flexGrow ​

flexGrow: number;

Defined in: ui/core/view-base/index.ts

Indicates that the child should grow in size, if necessary. Sets how much the child will grow in proportion to the rest of the child elements in the flex container.

Ns Property ​

Inherited from ​

ViewBase.flexGrow

flexShrink ​

flexShrink: number;

Defined in: ui/core/view-base/index.ts

Indicates that the child should shrink when the row runs out of space. Sets how much the flex item will shrink in proportion to the rest of the child elements in the flex container. When not specified, its value is set to 1.

Ns Property ​

Inherited from ​

ViewBase.flexShrink

flexWrapBefore ​

flexWrapBefore: boolean;

Defined in: ui/core/view-base/index.ts

When true, forces the item to wrap onto a new line.

Ns Property ​

Inherited from ​

ViewBase.flexWrapBefore

hidden ​

hidden: boolean;

Defined in: ui/core/view-base/index.ts

Gets or sets the visual state of the view.

Ns Property ​

Inherited from ​

ViewBase.hidden

id ​

id: string;

Defined in: ui/core/view-base/index.ts

Gets or sets the id for this view.

Ns Property ​

Inherited from ​

ViewBase.id

isCollapsed ​

isCollapsed: any;

Defined in: ui/core/view-base/index.ts

Returns true if visibility is set to 'collapse'. Default(false) set in prototype Readonly property

Inherited from ​

ViewBase.isCollapsed

left ​

left: LengthType;

Defined in: ui/core/view-base/index.ts

Gets or sets the distance, in pixels, between the left edge of the child and the left edge of its parent.

Ns Property ​

Inherited from ​

ViewBase.left

mIsRootView ​

mIsRootView: boolean;

Defined in: ui/core/view-base/index.ts

if _setupAsRootView is called it means it is not supposed to be added to a parent. However parent can be set before for the purpose of CSS variables/classes. That variable ensures that _addViewToNativeVisualTree is not called in _setupAsRootView

Inherited from ​

ViewBase.mIsRootView

nativeViewProtected ​

nativeViewProtected: any;

Defined in: ui/core/view-base/index.ts

read-only. If you want to set out-of-band the nativeView use the setNativeView method.

Inherited from ​

ViewBase.nativeViewProtected

order ​

order: number;

Defined in: ui/core/view-base/index.ts

Sets the order in which child elements inside a Flex appear in relation to one another.

Ns Property ​

Inherited from ​

ViewBase.order

parent ​

parent: ViewBase;

Defined in: ui/core/view-base/index.ts

Gets the parent view. This property is read-only.

Inherited from ​

ViewBase.parent

recycleNativeView ​

recycleNativeView: "auto" | "always" | "never";

Defined in: ui/core/view-base/index.ts

Inherited from ​

ViewBase.recycleNativeView

reusable ​

reusable: boolean;

Defined in: ui/core/view-base/index.ts

Gets or sets if the view is reusable. Reusable views are not automatically destroyed when removed from the View tree.

Ns Property ​

Inherited from ​

ViewBase.reusable

row ​

row: number;

Defined in: ui/core/view-base/index.ts

The row for the element. The rows are 0-indexed, so the first row is indicated by 0.

Ns Property ​

Inherited from ​

ViewBase.row

rowSpan ​

rowSpan: number;

Defined in: ui/core/view-base/index.ts

The number of rows for the element to span across.

Ns Property ​

Inherited from ​

ViewBase.rowSpan

sharedTransitionIgnore ​

sharedTransitionIgnore: boolean;

Defined in: ui/core/view-base/index.ts

Opt out of shared transition under different binding conditions

Ns Property ​

Inherited from ​

ViewBase.sharedTransitionIgnore

sharedTransitionTag ​

sharedTransitionTag: string;

Defined in: ui/core/view-base/index.ts

Gets or sets the shared transition tag for animated view transitions

Ns Property ​

Inherited from ​

ViewBase.sharedTransitionTag

title ​

title: string;

Defined in: ui/segmented-bar/index.d.ts:19

Gets or sets the title of the SegmentedBarItem.

Ns Property ​

top ​

top: LengthType;

Defined in: ui/core/view-base/index.ts

Gets or sets the distance, in pixels, between the top edge of the child and the top edge of its parent.

Ns Property ​

Inherited from ​

ViewBase.top

viewController ​

viewController: any;

Defined in: ui/core/view-base/index.ts

returns the native UIViewController.

Inherited from ​

ViewBase.viewController

createdEvent ​

static createdEvent: string;

Defined in: ui/core/view-base/index.ts

String value used when hooking to creation event

Ns Event ​

created

Inherited from ​

ViewBase.createdEvent

disposeNativeViewEvent ​

static disposeNativeViewEvent: string;

Defined in: ui/core/view-base/index.ts

String value used when hooking to disposeNativeView event

Ns Event ​

disposeNativeView

Inherited from ​

ViewBase.disposeNativeViewEvent

loadedEvent ​

static loadedEvent: string;

Defined in: ui/core/view-base/index.ts

String value used when hooking to loaded event.

Ns Event ​

loaded

Inherited from ​

ViewBase.loadedEvent

propertyChangeEvent ​

static propertyChangeEvent: string;

Defined in: data/observable/index.ts

String value used when hooking to propertyChange event.

Ns Event ​

propertyChange

Inherited from ​

ViewBase.propertyChangeEvent

unloadedEvent ​

static unloadedEvent: string;

Defined in: ui/core/view-base/index.ts

String value used when hooking to unloaded event.

Ns Event ​

unloaded

Inherited from ​

ViewBase.unloadedEvent

Accessors ​

android ​

Get Signature ​

get android(): any;

Defined in: ui/core/view-base/index.ts

Returns ​

any

Inherited from ​

ViewBase.android

class ​

Get Signature ​

get class(): string;

Defined in: ui/core/view-base/index.ts

Returns ​

string

Set Signature ​

set class(v: string): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.class

effectivePaddingBottom ​

Get Signature ​

get effectivePaddingBottom(): number;

Defined in: ui/core/view-base/index.ts

Returns ​

number

Set Signature ​

set effectivePaddingBottom(v: number): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.effectivePaddingBottom

effectivePaddingLeft ​

Get Signature ​

get effectivePaddingLeft(): number;

Defined in: ui/core/view-base/index.ts

Returns ​

number

Set Signature ​

set effectivePaddingLeft(v: number): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.effectivePaddingLeft

effectivePaddingRight ​

Get Signature ​

get effectivePaddingRight(): number;

Defined in: ui/core/view-base/index.ts

Returns ​

number

Set Signature ​

set effectivePaddingRight(v: number): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.effectivePaddingRight

effectivePaddingTop ​

Get Signature ​

get effectivePaddingTop(): number;

Defined in: ui/core/view-base/index.ts

Returns ​

number

Set Signature ​

set effectivePaddingTop(v: number): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.effectivePaddingTop

ios ​

Get Signature ​

get ios(): any;

Defined in: ui/core/view-base/index.ts

Returns ​

any

Inherited from ​

ViewBase.ios

isLoaded ​

Get Signature ​

get isLoaded(): boolean;

Defined in: ui/core/view-base/index.ts

Returns ​

boolean

Inherited from ​

ViewBase.isLoaded

nativeView ​

Get Signature ​

get nativeView(): any;

Defined in: ui/core/view-base/index.ts

Returns ​

any

Set Signature ​

set nativeView(value: any): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.nativeView

page ​

Get Signature ​

get page(): Page;

Defined in: ui/core/view-base/index.ts

Gets owner page. This is a read-only property.

Returns ​

Page

Inherited from ​

ViewBase.page

parentNode ​

Get Signature ​

get parentNode(): ViewBase;

Defined in: ui/core/view-base/index.ts

Gets the template parent or the native parent. Sets the template parent.

Returns ​

ViewBase

Set Signature ​

set parentNode(node: ViewBase): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.parentNode

style ​

Get Signature ​

get style(): Style;

Defined in: ui/core/view-base/index.ts

Gets the style object associated to this view.

Returns ​

Style

Set Signature ​

set style(inlineStyle: Style): void;

Defined in: ui/core/view-base/index.ts

Ns Property ​

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.style

typeName ​

Get Signature ​

get typeName(): string;

Defined in: ui/core/view-base/index.ts

Gets the name of the constructor function for this instance. E.g. for a Button class this will return "Button".

Returns ​

string

Inherited from ​

ViewBase.typeName

visualState ​

Get Signature ​

get visualState(): string;

Defined in: ui/core/view-base/index.ts

Deprecated ​

Returns ​

string

Inherited from ​

ViewBase.visualState

Methods ​

_addView() ​

_addView(view: ViewBase, atIndex?: number): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._addView

_addViewCore() ​

_addViewCore(view: ViewBase, atIndex?: number): void;

Defined in: ui/core/view-base/index.ts

Method is intended to be overridden by inheritors and used as "protected"

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._addViewCore

_addViewToNativeVisualTree() ​

_addViewToNativeVisualTree(view: ViewBase, atIndex?: number): boolean;

Defined in: ui/core/view-base/index.ts

Performs the core logic of adding a child view to the native visual tree. Returns true if the view's native representation has been successfully added, false otherwise. Method is intended to be overridden by inheritors and used as "protected".

Parameters ​

Returns ​

boolean

Inherited from ​

ViewBase._addViewToNativeVisualTree

_addVisualState() ​

_addVisualState(state: string): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._addVisualState

_applyXmlAttribute() ​

_applyXmlAttribute(attribute: string, value: string): boolean;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

boolean

Deprecated ​

This used to be the way to set attribute values in early {N} versions. Now attributes are expected to be set as plain properties on the view instances.

Inherited from ​

ViewBase._applyXmlAttribute

_batchUpdate() ​

_batchUpdate<T>(callback: () => T): T;

Defined in: ui/core/view-base/index.ts

Allow multiple updates to be performed on the instance at once.

Type Parameters ​

Parameters ​

Returns ​

T

Inherited from ​

ViewBase._batchUpdate

_childIndexToNativeChildIndex() ​

_childIndexToNativeChildIndex(index?: number): number;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

number

Inherited from ​

ViewBase._childIndexToNativeChildIndex

_createPropertyChangeData() ​

_createPropertyChangeData(
   propertyName: string, 
   value: any, 
   oldValue?: any): PropertyChangeData;

Defined in: data/observable/index.ts

This method is intended to be overriden by inheritors to provide additional implementation.

Parameters ​

Returns ​

PropertyChangeData

Inherited from ​

ViewBase._createPropertyChangeData

_dialogClosed() ​

_dialogClosed(): void;

Defined in: ui/core/view-base/index.ts

Method is intended to be overridden by inheritors and used as "protected"

Returns ​

void

Inherited from ​

ViewBase._dialogClosed

_emit() ​

_emit(eventName: string): void;

Defined in: data/observable/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._emit

_goToVisualState() ​

_goToVisualState(state: string): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Deprecated ​

Use View._addVisualState() and View._removeVisualState() instead.

Inherited from ​

ViewBase._goToVisualState

_inheritStyles() ​

_inheritStyles(view: ViewBase): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._inheritStyles

_inheritStyleScope() ​

_inheritStyleScope(styleScope: StyleScope): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._inheritStyleScope

_layoutParent() ​

_layoutParent(): void;

Defined in: ui/core/view-base/index.ts

Returns ​

void

Inherited from ​

ViewBase._layoutParent

_onRootViewReset() ​

_onRootViewReset(): void;

Defined in: ui/core/view-base/index.ts

Method is intended to be overridden by inheritors and used as "protected"

Returns ​

void

Inherited from ​

ViewBase._onRootViewReset

_parentChanged() ​

_parentChanged(oldParent: ViewBase): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._parentChanged

_removeView() ​

_removeView(view: ViewBase): void;

Defined in: ui/core/view-base/index.ts

Core logic for removing a child view from this instance. Used by the framework to handle lifecycle events more centralized. Do not use outside the UI Stack implementation.

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._removeView

_removeViewCore() ​

_removeViewCore(view: ViewBase): void;

Defined in: ui/core/view-base/index.ts

Method is intended to be overridden by inheritors and used as "protected"

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._removeViewCore

_removeViewFromNativeVisualTree() ​

_removeViewFromNativeVisualTree(view: ViewBase): void;

Defined in: ui/core/view-base/index.ts

Method is intended to be overridden by inheritors and used as "protected"

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._removeViewFromNativeVisualTree

_removeVisualState() ​

_removeVisualState(state: string): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._removeVisualState

_resumeNativeUpdates() ​

_resumeNativeUpdates(type: SuspendType): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._resumeNativeUpdates

_setDefaultPaddings() ​

_setDefaultPaddings(insets: any): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._setDefaultPaddings

_setupAsRootView() ​

_setupAsRootView(context: any): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._setupAsRootView

_setupUI() ​

_setupUI(
   context: any, 
   atIndex?: number, 
   parentIsLoaded?: boolean): void;

Defined in: ui/core/view-base/index.ts

Setups the UI for ViewBase and all its children recursively. This method should not be overridden by derived views.

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._setupUI

_shouldDelayLayout() ​

_shouldDelayLayout(): boolean;

Defined in: ui/core/view-base/index.ts

When returning true the callLoaded method will be run in setTimeout Method is intended to be overridden by inheritors and used as "protected"

Returns ​

boolean

Inherited from ​

ViewBase._shouldDelayLayout

_suspendNativeUpdates() ​

_suspendNativeUpdates(type: SuspendType): void;

Defined in: ui/core/view-base/index.ts

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._suspendNativeUpdates

_tearDownUI() ​

_tearDownUI(force?: boolean): void;

Defined in: ui/core/view-base/index.ts

Tears down the UI for ViewBase and all its children recursively. This method should not be overridden by derived views.

Parameters ​

Returns ​

void

Inherited from ​

ViewBase._tearDownUI

addEventListener() ​

addEventListener(
   eventName: string, 
   callback: (data: EventData) => void, 
   thisArg?: any, 
   once?: boolean): void;

Defined in: data/observable/index.ts

Adds a listener for the specified event name.

Parameters ​

Returns ​

void

Inherited from ​

ViewBase.addEventListener