MenuButtonRef

public struct MenuButtonRef : MenuButtonProtocol, GWeakCapturing

The GtkMenuButton widget is used to display a popup when clicked on. This popup can be provided either as a GtkMenu, a GtkPopover or an abstract GMenuModel.

The GtkMenuButton widget can hold any valid child widget. That is, it can hold almost any other standard GtkWidget. The most commonly used child is GtkImage. If no widget is explicitely added to the GtkMenuButton, a GtkImage is automatically created, using an arrow image oriented according to GtkMenuButton:direction or the generic “open-menu-symbolic” icon if the direction is not set.

The positioning of the popup is determined by the GtkMenuButton:direction property of the menu button.

For menus, the GtkWidget:halign and GtkWidget:valign properties of the menu are also taken into account. For example, when the direction is GTK_ARROW_DOWN and the horizontal alignment is GTK_ALIGN_START, the menu will be positioned below the button, with the starting edge (depending on the text direction) of the menu aligned with the starting edge of the button. If there is not enough space below the button, the menu is popped up above the button instead. If the alignment would move part of the menu offscreen, it is “pushed in”.

Direction = Down

  • halign = start

  • halign = center

  • halign = end

Direction = Up

  • halign = start

  • halign = center

  • halign = end

Direction = Left

  • valign = start

  • valign = center

  • valign = end

Direction = Right

  • valign = start

  • valign = center

  • valign = end

CSS nodes

GtkMenuButton has a single CSS node with name button. To differentiate it from a plain GtkButton, it gets the .popup style class.

The MenuButtonRef type acts as a lightweight Swift reference to an underlying GtkMenuButton instance. It exposes methods that can operate on this data type through MenuButtonProtocol conformance. Use MenuButtonRef only as an unowned reference to an existing GtkMenuButton instance.

Show on GitHub
  • ptr 
    Untyped pointer to the underlying `GtkMenuButton` instance.

    For type-safe access, use the generated, typed pointer menu_button_ptr property instead.

    Declaration

    Swift

    public let ptr: UnsafeMutableRawPointer!
    Show on GitHub

MenuButton Class

  • Designated initialiser from the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafeMutablePointer<GtkMenuButton>)
    Show on GitHub

  • Designated initialiser from a constant pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init(_ p: UnsafePointer<GtkMenuButton>)
    Show on GitHub

  • Conditional initialiser from an optional pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafeMutablePointer<GtkMenuButton>?)
    Show on GitHub

  • Conditional initialiser from an optional, non-mutable pointer to the underlying C data type

    Declaration

    Swift

    @inlinable
init!(_ maybePointer: UnsafePointer<GtkMenuButton>?)
    Show on GitHub

  • Conditional initialiser from an optional gpointer

    Declaration

    Swift

    @inlinable
init!(gpointer g: gpointer?)
    Show on GitHub

  • Conditional initialiser from an optional, non-mutable gconstpointer

    Declaration

    Swift

    @inlinable
init!(gconstpointer g: gconstpointer?)
    Show on GitHub

  • Reference intialiser for a related type that implements MenuButtonProtocol

    Declaration

    Swift

    @inlinable
init<T>(_ other: T) where T : MenuButtonProtocol
    Show on GitHub

  • This factory is syntactic sugar for setting weak pointers wrapped in GWeak<T>

    Declaration

    Swift

    @inlinable
static func unowned<T>(_ other: T) -> MenuButtonRef where T : MenuButtonProtocol
    Show on GitHub

  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to MenuButtonProtocol.

    Declaration

    Swift

    @inlinable
init<T>(cPointer: UnsafeMutablePointer<T>)
    Show on GitHub

  • Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to MenuButtonProtocol.

    Declaration

    Swift

    @inlinable
init<T>(constPointer: UnsafePointer<T>)
    Show on GitHub

  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to MenuButtonProtocol.

    Declaration

    Swift

    @inlinable
init(mutating raw: UnsafeRawPointer)
    Show on GitHub

  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to MenuButtonProtocol.

    Declaration

    Swift

    @inlinable
init(raw: UnsafeMutableRawPointer)
    Show on GitHub

  • Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to MenuButtonProtocol.

    Declaration

    Swift

    @inlinable
init(opaquePointer: OpaquePointer)
    Show on GitHub 
  • Creates a new `GtkMenuButton` widget with downwards-pointing

    arrow as the only child. You can replace the child widget with another GtkWidget should you wish to.

    Declaration

    Swift

    @inlinable
init()
    Show on GitHub