Class
GtkCenterBox
Description [src]
final class Gtk.CenterBox : Gtk.Widget
implements Gtk.Accessible, Gtk.Buildable, Gtk.ConstraintTarget, Gtk.Orientable {
/* No available fields */
}Arranges three children in a row, keeping the middle child centered as well as possible.
To add children to GtkCenterBox, use gtk_center_box_set_start_widget(),
gtk_center_box_set_center_widget() and
gtk_center_box_set_end_widget().
The sizing and positioning of children can be influenced with the align and expand properties of the children.
GtkCenterBox as GtkBuildable
The GtkCenterBox implementation of the GtkBuildable interface
supports placing children in the 3 positions by specifying “start”, “center”
or “end” as the “type” attribute of a <child> element.
CSS nodes
GtkCenterBox uses a single CSS node with the name “box”,
The first child of the GtkCenterBox will be allocated depending on the
text direction, i.e. in left-to-right layouts it will be allocated on the
left and in right-to-left layouts on the right.
In vertical orientation, the nodes of the children are arranged from top to bottom.
Accessibility
Until GTK 4.10, GtkCenterBox used the GTK_ACCESSIBLE_ROLE_GROUP role.
Starting from GTK 4.12, GtkCenterBox uses the GTK_ACCESSIBLE_ROLE_GENERIC role.
Instance methods
gtk_center_box_get_shrink_center_last
Gets whether the center widget shrinks after other children.
since: 4.12
gtk_center_box_set_shrink_center_last
Sets whether to shrink the center widget after other children.
since: 4.12
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 implementation for the given accessible object.
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
Queries 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.
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.
gtk_accessible_update_state_value
Updates an array of accessible states.
Methods inherited from GtkBuildable (1)
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.CenterBox:baseline-position
The position of the baseline aligned widget if extra space is available.
Gtk.CenterBox:shrink-center-last
Whether to shrink the center widget after other children.
since: 4.12
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 GtkWidget::query-tooltip
signal on widget.
Gtk.Widget:height-request
Overrides 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
Overrides for width request of the widget.
Properties inherited from GtkAccessible (1)
Properties inherited from GtkOrientable (1)
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.