### Class

# GtkBox

#### Description [src]

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

The `GtkBox` widget arranges child widgets into a single row or column.

Whether it is a row or column depends on the value of its `GtkOrientable:orientation` property. Within the other dimension, all children are allocated the same size. Of course, the `GtkWidget:halign` and `GtkWidget:valign` properties can be used on the children to influence their allocation.

Use repeated calls to `gtk_box_append()` to pack widgets into a `GtkBox` from start to end. Use `gtk_box_remove()` to remove widgets from the `GtkBox`. `gtk_box_insert_child_after()` can be used to add a child at a particular position.

Use `gtk_box_set_homogeneous()` to specify whether or not all children of the `GtkBox` are forced to get the same amount of space.

Use `gtk_box_set_spacing()` to determine how much space will be minimally placed between all children in the `GtkBox`. Note that spacing is added between the children.

Use `gtk_box_reorder_child_after()` to move a child to a different place in the box.

# CSS nodes

`GtkBox` uses a single CSS node with name box.

# Accessibility

Until GTK 4.10, `GtkBox` used the `GTK_ACCESSIBLE_ROLE_GROUP` role.

Starting from GTK 4.12, `GtkBox` uses the `GTK_ACCESSIBLE_ROLE_GENERIC` role.

#### Hierarchy

#### Ancestors

- GtkWidget
- GInitiallyUnowned
- GObject

#### Descendants

- GtkShortcutsGroup
- GtkShortcutsSection

#### Implements

- GtkAccessible
- GtkBuildable
- GtkConstraintTarget
- GtkOrientable

#### Constructors

###### gtk_box_new

Creates a new `GtkBox`.

#### Instance methods

###### gtk_box_append

Adds `child` as the last child to `box`.

###### gtk_box_get_baseline_child

Gets the value set by gtk_box_set_baseline_child().

since: 4.12

###### gtk_box_get_baseline_position

Gets the value set by gtk_box_set_baseline_position().

###### gtk_box_get_homogeneous

Returns whether the box is homogeneous (all children are the same size).

###### gtk_box_get_spacing

Gets the value set by gtk_box_set_spacing().

###### gtk_box_insert_child_after

Inserts `child` in the position after `sibling` in the list of `box` children.

###### gtk_box_prepend

Adds `child` as the first child to `box`.

###### gtk_box_remove

Removes a child widget from `box`.

###### gtk_box_reorder_child_after

Moves `child` to the position after `sibling` in the list of `box` children.

###### gtk_box_set_baseline_child

Sets the baseline child of a box.

since: 4.12

###### gtk_box_set_baseline_position

Sets the baseline position of a box.

###### gtk_box_set_homogeneous

Sets whether or not all children of `box` are given equal space in the box.

###### gtk_box_set_spacing

Sets the number of pixels to place between children of `box`.

##### 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.

##### Methods inherited from GtkOrientable (2)

###### gtk_orientable_get_orientation

Retrieves the orientation of the `orientable`.

###### gtk_orientable_set_orientation

Sets the orientation of the `orientable`.

#### Properties

###### Gtk.Box:baseline-child

The child that determines the baseline, in vertical orientation.

since: 4.12

###### Gtk.Box:baseline-position

The position of the baseline aligned widgets if extra space is available.

###### Gtk.Box:homogeneous

Whether the children should all be the same size.

###### Gtk.Box:spacing

The amount of space between children.

##### 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.

##### Properties inherited from GtkOrientable (1)

###### GtkOrientable:orientation

The orientation of the orientable.

#### Signals

##### 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.

#### Class structure

    struct GtkBoxClass {
      GtkWidgetClass parent_class;

    }

No description available.

###### Class members

`parent_class: GtkWidgetClass`

  The parent class.