### Class

# Gtk MenuButton

#### Description [src]

    final class Gtk.MenuButton : Gtk.Widget
      implements Gtk.Accessible, Gtk.Buildable, Gtk.ConstraintTarget {
      /* No available fields */
    }

The `GtkMenuButton` widget is used to display a popup when clicked.

This popup can be provided either as a `GtkPopover` or as an abstract `GMenuModel`.

The `GtkMenuButton` widget can show either an icon (set with the `GtkMenuButton:icon-name` property) or a label (set with the `GtkMenuButton:label` property). If neither is explicitly set, 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”.

| start | center | end
--- | --- | --- | ---
down |  |  |
up |  |  |
left |  |  |
right |  |  |

# CSS nodes

    menubutton
    ╰── button.toggle
        ╰── <content>
             ╰── [arrow]

`GtkMenuButton` has a single CSS node with name `menubutton` which contains a `button` node with a `.toggle` style class.

If the button contains an icon, it will have the `.image-button` style class, if it contains text, it will have `.text-button` style class. If an arrow is visible in addition to an icon, text or a custom child, it will also have `.arrow-button` style class.

Inside the toggle button content, there is an `arrow` node for the indicator, which will carry one of the `.none`, `.up`, `.down`, `.left` or `.right` style classes to indicate the direction that the menu will appear in. The CSS is expected to provide a suitable image for each of these cases using the `-gtk-icon-source` property.

Optionally, the `menubutton` node can carry the `.circular` style class to request a round appearance.

# Accessibility

`GtkMenuButton` uses the `GTK_ACCESSIBLE_ROLE_BUTTON` role.

#### Hierarchy

#### Ancestors

- GtkWidget
- GInitiallyUnowned
- GObject

#### Implements

- GtkAccessible
- GtkBuildable
- GtkConstraintTarget

#### Constructors

###### gtk_menu_button_new

Creates a new `GtkMenuButton` widget with downwards-pointing arrow as the only child.

#### Instance methods

###### gtk_menu_button_get_active

Returns whether the menu button is active.

since: 4.10

###### gtk_menu_button_get_always_show_arrow

Gets whether to show a dropdown arrow even when using an icon or a custom child.

since: 4.4

###### gtk_menu_button_get_can_shrink

Retrieves whether the button can be smaller than the natural size of its contents.

since: 4.12

###### gtk_menu_button_get_child

Gets the child widget of `menu_button`.

since: 4.6

###### gtk_menu_button_get_direction

Returns the direction the popup will be pointing at when popped up.

###### gtk_menu_button_get_has_frame

Returns whether the button has a frame.

###### gtk_menu_button_get_icon_name

Gets the name of the icon shown in the button.

###### gtk_menu_button_get_label

Gets the label shown in the button.

###### gtk_menu_button_get_menu_model

Returns the `GMenuModel` used to generate the popup.

###### gtk_menu_button_get_popover

Returns the `GtkPopover` that pops out of the button.

###### gtk_menu_button_get_primary

Returns whether the menu button acts as a primary menu.

since: 4.4

###### gtk_menu_button_get_use_underline

Returns whether an embedded underline in the text indicates a mnemonic.

###### gtk_menu_button_popdown

Dismiss the menu.

###### gtk_menu_button_popup

Pop up the menu.

###### gtk_menu_button_set_active

Sets whether the menu button is active.

since: 4.10

###### gtk_menu_button_set_always_show_arrow

Sets whether to show a dropdown arrow even when using an icon or a custom child.

since: 4.4

###### gtk_menu_button_set_can_shrink

Sets whether the button size can be smaller than the natural size of its contents.

since: 4.12

###### gtk_menu_button_set_child

Sets the child widget of `menu_button`.

since: 4.6

###### gtk_menu_button_set_create_popup_func

Sets `func` to be called when a popup is about to be shown.

###### gtk_menu_button_set_direction

Sets the direction in which the popup will be popped up.

###### gtk_menu_button_set_has_frame

Sets the style of the button.

###### gtk_menu_button_set_icon_name

Sets the name of an icon to show inside the menu button.

###### gtk_menu_button_set_label

Sets the label to show inside the menu button.

###### gtk_menu_button_set_menu_model

Sets the `GMenuModel` from which the popup will be constructed.

###### gtk_menu_button_set_popover

Sets the `GtkPopover` that will be popped up when the `menu_button` is clicked.

###### gtk_menu_button_set_primary

Sets whether menu button acts as a primary menu.

since: 4.4

###### gtk_menu_button_set_use_underline

If true, an underline in the text indicates a mnemonic.

##### Methods inherited from GtkWidget (162)

Please see GtkWidget for a full list of methods.

##### Methods inherited from GObject (43)

Please see GObject for a full list of methods.

##### Methods inherited from GtkAccessible (19)

###### gtk_accessible_announce

Requests the user’s screen reader to announce the given message.

since: 4.14

###### gtk_accessible_get_accessible_parent

Retrieves the accessible parent for an accessible object.

since: 4.10

###### gtk_accessible_get_accessible_role

Retrieves the accessible role of an accessible object.

###### gtk_accessible_get_at_context

Retrieves the accessible implementation for the given `GtkAccessible`.

since: 4.10

###### gtk_accessible_get_bounds

Queries the coordinates and dimensions of this accessible.

since: 4.10

###### gtk_accessible_get_first_accessible_child

Retrieves the first accessible child of an accessible object.

since: 4.10

###### gtk_accessible_get_next_accessible_sibling

Retrieves the next accessible sibling of an accessible object.

since: 4.10

###### gtk_accessible_get_platform_state

Query a platform state, such as focus.

since: 4.10

###### gtk_accessible_reset_property

Resets the accessible `property` to its default value.

###### gtk_accessible_reset_relation

Resets the accessible `relation` to its default value.

###### gtk_accessible_reset_state

Resets the accessible `state` to its default value.

###### gtk_accessible_set_accessible_parent

Sets the parent and sibling of an accessible object.

since: 4.10

###### gtk_accessible_update_next_accessible_sibling

Updates the next accessible sibling of `self`.

since: 4.10

###### gtk_accessible_update_property

Updates a list of accessible properties.

###### gtk_accessible_update_property_value

Updates an array of accessible properties.

###### gtk_accessible_update_relation

Updates a list of accessible relations.

###### gtk_accessible_update_relation_value

Updates an array of accessible relations.

###### gtk_accessible_update_state

Updates a list of accessible states. See the `GtkAccessibleState` documentation for the value types of accessible states.

###### gtk_accessible_update_state_value

Updates an array of accessible states.

##### Methods inherited from GtkBuildable (1)

###### gtk_buildable_get_buildable_id

Gets the ID of the `buildable` object.

#### Properties

###### Gtk.MenuButton:active

Whether the menu button is active.

since: 4.10

###### Gtk.MenuButton:always-show-arrow

Whether to show a dropdown arrow even when using an icon or a custom child.

since: 4.4

###### Gtk.MenuButton:can-shrink

Whether the size of the button can be made smaller than the natural size of its contents.

since: 4.12

###### Gtk.MenuButton:child

The child widget.

since: 4.6

###### Gtk.MenuButton:direction

The `GtkArrowType` representing the direction in which the menu or popover will be popped out.

###### Gtk.MenuButton:has-frame

Whether the button has a frame.

###### Gtk.MenuButton:icon-name

The name of the icon used to automatically populate the button.

###### Gtk.MenuButton:label

The label for the button.

###### Gtk.MenuButton:menu-model

The `GMenuModel` from which the popup will be created.

###### Gtk.MenuButton:popover

The `GtkPopover` that will be popped up when the button is clicked.

###### Gtk.MenuButton:primary

Whether the menu button acts as a primary menu.

since: 4.4

###### Gtk.MenuButton:use-underline

If set an underscore in the text indicates a mnemonic.

##### Properties inherited from GtkWidget (34)

###### Gtk.Widget:can-focus

Whether the widget or any of its descendents can accept the input focus.

###### Gtk.Widget:can-target

Whether the widget can receive pointer events.

###### Gtk.Widget:css-classes

A list of css classes applied to this widget.

###### Gtk.Widget:css-name

The name of this widget in the CSS tree.

###### Gtk.Widget:cursor

The cursor used by `widget`.

###### Gtk.Widget:focus-on-click

Whether the widget should grab focus when it is clicked with the mouse.

###### Gtk.Widget:focusable

Whether this widget itself will accept the input focus.

###### Gtk.Widget:halign

How to distribute horizontal space if widget gets extra space.

###### Gtk.Widget:has-default

Whether the widget is the default widget.

###### Gtk.Widget:has-focus

Whether the widget has the input focus.

###### Gtk.Widget:has-tooltip

Enables or disables the emission of the ::query-tooltip signal on `widget`.

###### Gtk.Widget:height-request

Override for height request of the widget.

###### Gtk.Widget:hexpand

Whether to expand horizontally.

###### Gtk.Widget:hexpand-set

Whether to use the `hexpand` property.

###### Gtk.Widget:layout-manager

The `GtkLayoutManager` instance to use to compute the preferred size of the widget, and allocate its children.

###### Gtk.Widget:margin-bottom

Margin on bottom side of widget.

###### Gtk.Widget:margin-end

Margin on end of widget, horizontally.

###### Gtk.Widget:margin-start

Margin on start of widget, horizontally.

###### Gtk.Widget:margin-top

Margin on top side of widget.

###### Gtk.Widget:name

The name of the widget.

###### Gtk.Widget:opacity

The requested opacity of the widget.

###### Gtk.Widget:overflow

How content outside the widget’s content area is treated.

###### Gtk.Widget:parent

The parent widget of this widget.

###### Gtk.Widget:receives-default

Whether the widget will receive the default action when it is focused.

###### Gtk.Widget:root

The `GtkRoot` widget of the widget tree containing this widget.

###### Gtk.Widget:scale-factor

The scale factor of the widget.

###### Gtk.Widget:sensitive

Whether the widget responds to input.

###### Gtk.Widget:tooltip-markup

Sets the text of tooltip to be the given string, which is marked up with Pango markup.

###### Gtk.Widget:tooltip-text

Sets the text of tooltip to be the given string.

###### Gtk.Widget:valign

How to distribute vertical space if widget gets extra space.

###### Gtk.Widget:vexpand

Whether to expand vertically.

###### Gtk.Widget:vexpand-set

Whether to use the `vexpand` property.

###### Gtk.Widget:visible

Whether the widget is visible.

###### Gtk.Widget:width-request

Override for width request of the widget.

##### Properties inherited from GtkAccessible (1)

###### GtkAccessible:accessible-role

The accessible role of the given `GtkAccessible` implementation.

#### Signals

###### Gtk.MenuButton::activate

Emitted to when the menu button is activated.

since: 4.4

##### Signals inherited from GtkWidget (13)

###### GtkWidget::destroy

Signals that all holders of a reference to the widget should release the reference that they hold.

###### GtkWidget::direction-changed

Emitted when the text direction of a widget changes.

###### GtkWidget::hide

Emitted when `widget` is hidden.

###### GtkWidget::keynav-failed

Emitted if keyboard navigation fails.

###### GtkWidget::map

Emitted when `widget` is going to be mapped.

###### GtkWidget::mnemonic-activate

Emitted when a widget is activated via a mnemonic.

###### GtkWidget::move-focus

Emitted when the focus is moved.

###### GtkWidget::query-tooltip

Emitted when the widget’s tooltip is about to be shown.

###### GtkWidget::realize

Emitted when `widget` is associated with a `GdkSurface`.

###### GtkWidget::show

Emitted when `widget` is shown.

###### GtkWidget::state-flags-changed

Emitted when the widget state changes.

###### GtkWidget::unmap

Emitted when `widget` is going to be unmapped.

###### GtkWidget::unrealize

Emitted when the `GdkSurface` associated with `widget` is destroyed.

##### Signals inherited from GObject (1)

###### GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.