Class
GtkHeaderBar
Description [src]
final class Gtk.HeaderBar : Gtk.Widget
implements Gtk.Accessible, Gtk.Buildable, Gtk.ConstraintTarget {
/* No available fields */
}A widget for creating custom title bars for windows.
GtkHeaderBar is similar to a horizontal GtkCenterBox. It allows
children to be placed at the start or the end. In addition, it allows
the window title to be displayed. The title will be centered with respect
to the width of the box, even if the children at either side take up
different amounts of space.
GtkHeaderBar can add typical window frame controls, such as minimize,
maximize and close buttons, or the window icon.
For these reasons, GtkHeaderBar is the natural choice for use as the
custom titlebar widget of a GtkWindow (see gtk_window_set_titlebar()),
as it gives features typical of titlebars while allowing the addition of
child widgets.
GtkHeaderBar as GtkBuildable
The GtkHeaderBar implementation of the GtkBuildable interface supports
adding children at the start or end sides by specifying “start” or “end” as
the “type” attribute of a <child> element, or setting the title widget by
specifying “title” value.
By default the GtkHeaderBar uses a GtkLabel displaying the title of the
window it is contained in as the title widget, equivalent to the following
UI definition:
<object class="GtkHeaderBar">
<property name="title-widget">
<object class="GtkLabel">
<property name="label" translatable="yes">Label</property>
<property name="single-line-mode">True</property>
<property name="ellipsize">end</property>
<property name="width-chars">5</property>
<style>
<class name="title"/>
</style>
</object>
</property>
</object>
CSS nodes
headerbar
╰── windowhandle
╰── box
├── box.start
│ ├── windowcontrols.start
│ ╰── [other children]
├── [Title Widget]
╰── box.end
├── [other children]
╰── windowcontrols.end
A GtkHeaderBar‘s CSS node is called headerbar. It contains a windowhandle
subnode, which contains a box subnode, which contains two box subnodes at
the start and end of the header bar, as well as a center node that represents
the title.
Each of the boxes contains a windowcontrols subnode, see
GtkWindowControls for details, as well as other children.
Accessibility
GtkHeaderBar uses the GTK_ACCESSIBLE_ROLE_GROUP role.
Instance methods
gtk_header_bar_get_show_title_buttons
Returns whether this header bar shows the standard window title buttons.
gtk_header_bar_set_show_title_buttons
Sets whether this header bar shows the standard window title buttons.
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)
Properties
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)
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.