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Menu

Class MenuBar

A widget which displays menus as a canonical menu bar. The namespace for the MenuBar class statics.

Hierarchy

Implements

  • IMessageHandler
  • IObservableDisposable

Index

Modules

Enumerations

Classes

Interfaces

Constructors

Properties

Accessors

Methods

Constructors

constructor

  • new MenuBar(options?: IOptions): MenuBar

Properties

Private _activeIndex

_activeIndex: number = -1

Private _childMenu

_childMenu: Menu | null = null

Private _forceItemsPosition

_forceItemsPosition: IOpenOptions

Private _menus

_menus: Menu[] = []

Private _tabFocusIndex

_tabFocusIndex: number = 0

node

node: HTMLElement

Get the DOM node owned by the widget.

renderer

renderer: IRenderer

The renderer used by the menu bar.

Static defaultRenderer

defaultRenderer: Renderer = new Renderer()

The default Renderer instance.

Accessors

activeIndex

  • get activeIndex(): number
  • set activeIndex(value: number): void

  • Get the index of the currently active menu.

    Notes

    This will be -1 if no menu is active.

    Returns number

  • Set the index of the currently active menu.

    Notes

    If the menu cannot be activated, the index will be set to -1.

    Parameters

    • value: number

    Returns void

activeMenu

  • get activeMenu(): Menu | null
  • set activeMenu(value: Menu | null): void

childMenu

  • get childMenu(): Menu | null

contentNode

  • get contentNode(): HTMLUListElement

  • Get the menu bar content node.

    Notes

    This is the node which holds the menu title nodes.

    Modifying this node directly can lead to undefined behavior.

    Returns HTMLUListElement

dataset

  • get dataset(): DOMStringMap

disposed

  • get disposed(): ISignal<this, void>

hiddenMode

id

  • get id(): string
  • set id(value: string): void

isAttached

  • get isAttached(): boolean

isDisposed

  • get isDisposed(): boolean

isHidden

  • get isHidden(): boolean

isVisible

  • get isVisible(): boolean

  • Test whether the widget is visible.

    Notes

    A widget is visible when it is attached to the DOM, is not explicitly hidden, and has no explicitly hidden ancestors.

    Returns boolean

layout

  • get layout(): Layout | null
  • set layout(value: Layout | null): void

  • Get the layout for the widget.

    Notes

    The layout is single-use only. It cannot be changed after the first assignment.

    The layout is disposed automatically when the widget is disposed.

    Returns Layout | null

  • Set the layout for the widget.

    Notes

    The layout is single-use only. It cannot be changed after the first assignment.

    The layout is disposed automatically when the widget is disposed.

    Parameters

    Returns void

menus

  • get menus(): ReadonlyArray<Menu>

parent

  • get parent(): Widget | null
  • set parent(value: Widget | null): void

  • Get the parent of the widget.

    Notes

    Children are typically added to a widget by using a layout, which means user code will not normally set the parent widget directly.

    The widget will be automatically removed from its old parent.

    This is a no-op if there is no effective parent change.

    Returns Widget | null

  • Set the parent of the widget.

    Notes

    Children are typically added to a widget by using a layout, which means user code will not normally set the parent widget directly.

    The widget will be automatically removed from its old parent.

    This is a no-op if there is no effective parent change.

    Parameters

    Returns void

title

  • The title object for the widget.

    Notes

    The title object is used by some container widgets when displaying the widget alongside some title, such as a tab panel or side bar.

    Since not all widgets will use the title, it is created on demand.

    The owner property of the title is set to this widget.

    Returns Title<Widget>

Methods

Private _closeChildMenu

  • _closeChildMenu(): void

  • Close the child menu immediately.

    This is a no-op if a child menu is not open.

    Returns void

Private _evtKeyDown

  • _evtKeyDown(event: KeyboardEvent): void

  • Handle the 'keydown' event for the menu bar.

    Notes

    All keys are trapped except the tab key that is ignored.

    Parameters

    • event: KeyboardEvent

    Returns void

Private _evtMouseDown

  • _evtMouseDown(event: MouseEvent): void

Private _evtMouseLeave

  • _evtMouseLeave(event: MouseEvent): void

Private _evtMouseMove

  • _evtMouseMove(event: MouseEvent): void

Private _onMenuAboutToClose

  • _onMenuAboutToClose(sender: Menu): void

Private _onMenuMenuRequested

  • _onMenuMenuRequested(sender: Menu, args: "next" | "previous"): void

  • Handle the menuRequested signal of a child menu.

    Parameters

    • sender: Menu
    • args: "next" | "previous"

    Returns void

Private _onTitleChanged

  • _onTitleChanged(): void

Private _openChildMenu

  • _openChildMenu(options?: object): void

  • Open the child menu at the active index immediately.

    If a different child menu is already open, it will be closed, even if there is no active menu.

    Parameters

    • Default value options: object = {}

    Returns void

Private _positionForMenu

  • _positionForMenu(index: number): IPosition

  • Find initial position for the menu based on menubar item position.

    NOTE: this should be called before updating active index to avoid an additional layout and style invalidation as changing active index modifies DOM.

    Parameters

    • index: number

    Returns IPosition

activate

  • activate(): void

addClass

  • addClass(name: string): void

  • Add a class name to the widget's DOM node.

    Parameters

    • name: string

      The class name to add to the node.

      Notes

      If the class name is already added to the node, this is a no-op.

      The class name must not contain whitespace.

    Returns void

addMenu

  • addMenu(menu: Menu): void

  • Add a menu to the end of the menu bar.

    Parameters

    • menu: Menu

      The menu to add to the menu bar.

      Notes

      If the menu is already added to the menu bar, it will be moved.

    Returns void

children

  • children(): IIterator<Widget>

  • Create an iterator over the widget's children.

    Returns IIterator<Widget>

    A new iterator over the children of the widget.

    Notes

    The widget must have a populated layout in order to have children.

    If a layout is not installed, the returned iterator will be empty.

clearFlag

  • clearFlag(flag: Flag): void

clearMenus

  • clearMenus(): void

close

  • close(): void

contains

  • contains(widget: Widget): boolean

  • Test whether a widget is a descendant of this widget.

    Parameters

    • widget: Widget

      The descendant widget of interest.

    Returns boolean

    true if the widget is a descendant, false otherwise.

dispose

  • dispose(): void

fit

  • fit(): void

handleEvent

  • handleEvent(event: Event): void

  • Handle the DOM events for the menu bar.

    Parameters

    • event: Event

      The DOM event sent to the menu bar.

      Notes

      This method implements the DOM EventListener interface and is called in response to events on the menu bar's DOM nodes. It should not be called directly by user code.

    Returns void

hasClass

  • hasClass(name: string): boolean

  • Test whether the widget's DOM node has the given class name.

    Parameters

    • name: string

      The class name of interest.

    Returns boolean

    true if the node has the class, false otherwise.

hide

  • hide(): void

insertMenu

  • insertMenu(index: number, menu: Menu): void

  • Insert a menu into the menu bar at the specified index.

    Parameters

    • index: number

      The index at which to insert the menu.

    • menu: Menu

      The menu to insert into the menu bar.

      Notes

      The index will be clamped to the bounds of the menus.

      If the menu is already added to the menu bar, it will be moved.

    Returns void

Protected notifyLayout

  • notifyLayout(msg: Message): void

  • Invoke the message processing routine of the widget's layout.

    Parameters

    • msg: Message

      The message to dispatch to the layout.

      Notes

      This is a no-op if the widget does not have a layout.

      This will not typically be called directly by user code.

    Returns void

Protected onActivateRequest

  • onActivateRequest(msg: Message): void

Protected onAfterAttach

  • onAfterAttach(msg: Message): void

Protected onAfterDetach

  • onAfterDetach(msg: Message): void

Protected onAfterHide

  • onAfterHide(msg: Message): void

Protected onAfterShow

  • onAfterShow(msg: Message): void

Protected onBeforeAttach

  • onBeforeAttach(msg: Message): void

Protected onBeforeDetach

  • onBeforeDetach(msg: Message): void

Protected onBeforeHide

  • onBeforeHide(msg: Message): void

Protected onBeforeShow

  • onBeforeShow(msg: Message): void

Protected onChildAdded

Protected onChildRemoved

Protected onCloseRequest

  • onCloseRequest(msg: Message): void

Protected onFitRequest

  • onFitRequest(msg: Message): void

Protected onResize

Protected onUpdateRequest

  • onUpdateRequest(msg: Message): void

openActiveMenu

  • openActiveMenu(): void

processMessage

  • processMessage(msg: Message): void

removeClass

  • removeClass(name: string): void

  • Remove a class name from the widget's DOM node.

    Parameters

    • name: string

      The class name to remove from the node.

      Notes

      If the class name is not yet added to the node, this is a no-op.

      The class name must not contain whitespace.

    Returns void

removeMenu

  • removeMenu(menu: Menu): void

  • Remove a menu from the menu bar.

    Parameters

    • menu: Menu

      The menu to remove from the menu bar.

      Notes

      This is a no-op if the menu is not in the menu bar.

    Returns void

removeMenuAt

  • removeMenuAt(index: number): void

  • Remove the menu at a given index from the menu bar.

    Parameters

    • index: number

      The index of the menu to remove.

      Notes

      This is a no-op if the index is out of range.

    Returns void

setFlag

  • setFlag(flag: Flag): void

setHidden

  • setHidden(hidden: boolean): void

  • Show or hide the widget according to a boolean value.

    Parameters

    • hidden: boolean

      true to hide the widget, or false to show it.

      Notes

      This is a convenience method for hide() and show().

    Returns void

show

  • show(): void

testFlag

  • testFlag(flag: Flag): boolean

toggleClass

  • toggleClass(name: string, force?: undefined | false | true): boolean

  • Toggle a class name on the widget's DOM node.

    Parameters

    • name: string

      The class name to toggle on the node.

    • Optional force: undefined | false | true

      Whether to force add the class (true) or force remove the class (false). If not provided, the presence of the class will be toggled from its current state.

    Returns boolean

    true if the class is now present, false otherwise.

    Notes

    The class name must not contain whitespace.

update

  • update(): void

Static attach

  • attach(widget: Widget, host: HTMLElement, ref?: HTMLElement | null): void

  • Attach a widget to a host DOM node.

    Parameters

    • widget: Widget

      The widget of interest.

    • host: HTMLElement

      The DOM node to use as the widget's host.

    • Default value ref: HTMLElement | null = null

      The child of host to use as the reference element. If this is provided, the widget will be inserted before this node in the host. The default is null, which will cause the widget to be added as the last child of the host.

      Notes

      This will throw an error if the widget is not a root widget, if the widget is already attached, or if the host is not attached to the DOM.

    Returns void

Static detach

  • detach(widget: Widget): void

  • Detach the widget from its host DOM node.

    Parameters

    • widget: Widget

      The widget of interest.

      Notes

      This will throw an error if the widget is not a root widget, or if the widget is not attached to the DOM.

    Returns void

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