Class KernelMenu

An extensible Kernel menu for the application.

Hierarchy

Implements

Constructors

Properties

commands: CommandRegistry

The command registry used by the menu.

kernelUsers: IKernelUser

Semantic commands IKernelUsers for the Kernel menu.

Get the DOM node owned by the widget.

renderer: IRenderer

The renderer used by the menu.

Accessors

  • get aboutToClose(): ISignal<this, void>
  • A signal emitted just before the menu is closed.

    Notes

    This signal is emitted when the menu receives a 'close-request' message, just before it removes itself from the DOM.

    This signal is not emitted if the menu is already detached from the DOM when it receives the 'close-request' message.

    Returns ISignal<this, void>

  • get activeIndex(): number
  • Get the index of the currently active menu item.

    Notes

    This will be -1 if no menu item is active.

    Returns number

  • set activeIndex(value): void
  • Set the index of the currently active menu item.

    Notes

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

    Parameters

    • value: number

    Returns void

  • get activeItem(): IItem
  • Get the currently active menu item.

    Returns IItem

  • set activeItem(value): void
  • Set the currently active menu item.

    Notes

    If the item cannot be activated, the item will be set to null.

    Parameters

    Returns void

  • get childMenu(): Menu
  • The child menu of the menu.

    Notes

    This is null unless the menu has an open submenu.

    Returns Menu

  • get contentNode(): HTMLUListElement
  • The menu content node.

    Notes

    This is the node which holds the menu item nodes.

    Modifying this node directly can lead to undefined behavior.

    Returns HTMLUListElement

  • get dataset(): DOMStringMap
  • The dataset for the widget's DOM node.

    Returns DOMStringMap

  • get disposed(): ISignal<this, void>
  • A signal emitted when the widget is disposed.

    Returns ISignal<this, void>

  • get hiddenMode(): HiddenMode
  • Get the method for hiding the widget.

    Returns HiddenMode

  • set hiddenMode(value): void
  • Set the method for hiding the widget.

    Parameters

    • value: HiddenMode

    Returns void

  • get id(): string
  • Get the id of the widget's DOM node.

    Returns string

  • set id(value): void
  • Set the id of the widget's DOM node.

    Parameters

    • value: string

    Returns void

  • get isAttached(): boolean
  • Test whether the widget's node is attached to the DOM.

    Returns boolean

  • get isDisposed(): boolean
  • Test whether the widget has been disposed.

    Returns boolean

  • get isHidden(): boolean
  • Test whether the widget is explicitly hidden.

    Returns boolean

  • 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

  • get items(): readonly IItem[]
  • A read-only array of the menu items in the menu.

    Returns readonly IItem[]

  • get layout(): Layout
  • Get the layout for the widget.

    Returns Layout

  • set layout(value): void
  • 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

    • value: Layout

    Returns void

  • get leafMenu(): Menu
  • The leaf menu of the menu hierarchy.

    Returns Menu

  • A signal emitted when a new menu is requested by the user.

    Notes

    This signal is emitted whenever the user presses the right or left arrow keys, and a submenu cannot be opened or closed in response.

    This signal is useful when implementing menu bars in order to open the next or previous menu in response to a user key press.

    This signal is only emitted for the root menu in a hierarchy.

    Returns ISignal<this, "next" | "previous">

  • get parent(): Widget
  • Get the parent of the widget.

    Returns Widget

  • set parent(value): void
  • 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

  • get parentMenu(): Menu
  • The parent menu of the menu.

    Notes

    This is null unless the menu is an open submenu.

    Returns Menu

  • get rank(): number
  • Menu rank.

    Returns number

  • get rootMenu(): Menu
  • The root menu of the menu hierarchy.

    Returns Menu

  • get title(): Title<Widget>
  • 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

  • Post an 'activate-request' message to the widget.

    Notes

    This is a simple convenience method for posting the message.

    Returns void

  • Activate the next selectable item in the menu.

    Notes

    If no item is selectable, the index will be set to -1.

    Returns void

  • Activate the previous selectable item in the menu.

    Notes

    If no item is selectable, the index will be set to -1.

    Returns 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

  • Add a group of menu items specific to a particular plugin.

    The rank can be set for all items in the group using the function argument or per item.

    Parameters

    • items: IRankedMenu.IItemOptions[]

      the list of menu items to add.

    • Optional rank: number

      the default rank in the menu in which to insert the group.

    Returns IDisposable

    Disposable of the group

  • Create an iterator over the widget's children.

    Returns IterableIterator<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.

  • Clear the given widget flag.

    Notes

    This will not typically be called directly by user code.

    Parameters

    • flag: Flag

    Returns void

  • Remove all menu items from the menu.

    Returns void

  • Send a 'close-request' message to the widget.

    Notes

    This is a simple convenience method for sending the message.

    Returns void

  • 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 of the resources held by the menu.

    Returns void

  • Post a 'fit-request' message to the widget.

    Notes

    This is a simple convenience method for posting the message.

    Returns void

  • Get the rank of the item at index.

    Parameters

    • index: number

      Item index.

    Returns number

    Rank of the item.

  • Handle the DOM events for the menu.

    Parameters

    • event: Event

      The DOM event sent to the menu.

      Notes

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

    Returns void

  • 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 the widget and make it hidden to its parent widget.

    Notes

    This causes the isHidden property to be true.

    If the widget is explicitly hidden, this is a no-op.

    Returns void

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

    Parameters

    • index: number

      The index at which to insert the item.

    • options: IRankedMenu.IItemOptions

      The options for creating the menu item.

    Returns IDisposableMenuItem

    The menu item added to the menu.

    Notes

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

  • 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

  • A message handler invoked on an 'activate-request' message.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on an 'after-attach' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on an 'after-detach' message.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on an 'after-hide' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on an 'after-show' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'before-attach' message.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'before-detach' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'before-hide' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'before-show' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'child-added' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: ChildMessage

    Returns void

  • A message handler invoked on a 'child-removed' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: ChildMessage

    Returns void

  • A message handler invoked on a 'close-request' message.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'fit-request' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: Message

    Returns void

  • A message handler invoked on a 'resize' message.

    Notes

    The default implementation of this handler is a no-op.

    Parameters

    • msg: ResizeMessage

    Returns void

  • A message handler invoked on an 'update-request' message.

    Parameters

    • msg: Message

    Returns void

  • Open the menu at the specified location.

    Parameters

    • x: number

      The client X coordinate of the menu location.

    • y: number

      The client Y coordinate of the menu location.

    • Optional options: IOpenOptions

      The additional options for opening the menu.

      Notes

      The menu will be opened at the given location unless it will not fully fit on the screen. If it will not fit, it will be adjusted to fit naturally on the screen.

      This is a no-op if the menu is already attached to the DOM.

    Returns void

  • Process a message sent to the widget.

    Parameters

    • msg: Message

      The message sent to the widget.

      Notes

      Subclasses may reimplement this method as needed.

    Returns 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

  • Remove an item from the menu.

    Parameters

    • item: IItem

      The item to remove from the menu.

      Notes

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

    Returns void

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

    Parameters

    • index: number

      The index of the item to remove.

      Notes

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

    Returns void

  • Set the given widget flag.

    Notes

    This will not typically be called directly by user code.

    Parameters

    • flag: Flag

    Returns 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 the widget and make it visible to its parent widget.

    Notes

    This causes the isHidden property to be false.

    If the widget is not explicitly hidden, this is a no-op.

    Returns void

  • Test whether the given widget flag is set.

    Notes

    This will not typically be called directly by user code.

    Parameters

    • flag: Flag

    Returns boolean

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

    Parameters

    • name: string

      The class name to toggle on the node.

    • Optional force: boolean

      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.

  • Trigger the active menu item.

    Notes

    If the active item is a submenu, it will be opened and the first item will be activated.

    If the active item is a command, the command will be executed.

    If the menu is not attached, this is a no-op.

    If there is no active item, this is a no-op.

    Returns void

  • Post an 'update-request' message to the widget.

    Notes

    This is a simple convenience method for posting the message.

    Returns void

  • Save window data used for menu positioning in transient cache.

    In order to avoid layout trashing it is recommended to invoke this method immediately prior to opening the menu and any DOM modifications (like closing previously visible menu, or adding a class to menu widget).

    The transient cache will be released upon open() call.

    Returns void

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