GtkHeaderBar

GtkHeaderBar — A box with a centered child

Functions

GtkWidget * gtk_header_bar_new ()
void gtk_header_bar_set_title ()
const gchar * gtk_header_bar_get_title ()
void gtk_header_bar_set_subtitle ()
const gchar * gtk_header_bar_get_subtitle ()
void gtk_header_bar_set_has_subtitle ()
gboolean gtk_header_bar_get_has_subtitle ()
void gtk_header_bar_set_custom_title ()
GtkWidget * gtk_header_bar_get_custom_title ()
void gtk_header_bar_pack_start ()
void gtk_header_bar_pack_end ()
void gtk_header_bar_set_show_close_button ()
gboolean gtk_header_bar_get_show_close_button ()
void gtk_header_bar_set_decoration_layout ()
const gchar * gtk_header_bar_get_decoration_layout ()

Properties

GtkWidget * custom-title Read / Write
char * decoration-layout Read / Write
gboolean decoration-layout-set Read / Write
gboolean has-subtitle Read / Write
gboolean show-close-button Read / Write
int spacing Read / Write
char * subtitle Read / Write
char * title Read / Write

Child Properties

GtkPackType pack-type Read / Write
int position Read / Write

Types and Values

struct GtkHeaderBar

Object Hierarchy

    GObject
    ╰── GInitiallyUnowned
        ╰── GtkWidget
            ╰── GtkContainer
                ╰── GtkHeaderBar

Implemented Interfaces

GtkHeaderBar implements AtkImplementorIface and GtkBuildable.

Includes

#include <gtk/gtk.h>

Description

GtkHeaderBar is similar to a horizontal GtkBox. It allows children to be placed at the start or the end. In addition, it allows a title and subtitle 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. The height of the titlebar will be set to provide sufficient space for the subtitle, even if none is currently set. If a subtitle is not needed, the space reservation can be turned off with gtk_header_bar_set_has_subtitle().

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.

Functions

gtk_header_bar_new ()

GtkWidget *
gtk_header_bar_new (void);

Creates a new GtkHeaderBar widget.

Returns

a new GtkHeaderBar

Since: 3.10

gtk_header_bar_set_title ()

void
gtk_header_bar_set_title (GtkHeaderBar *bar,
                          const gchar *title);

Sets the title of the GtkHeaderBar. The title should help a user identify the current view. A good title should not include the application name.

Parameters

bar

a GtkHeaderBar

title

a title, or NULL.

[allow-none]

Since: 3.10

gtk_header_bar_get_title ()

const gchar *
gtk_header_bar_get_title (GtkHeaderBar *bar);

Retrieves the title of the header. See gtk_header_bar_set_title().

Parameters

bar

a GtkHeaderBar

Returns

the title of the header, or NULL if none has been set explicitly. The returned string is owned by the widget and must not be modified or freed.

[nullable]

Since: 3.10

gtk_header_bar_set_subtitle ()

void
gtk_header_bar_set_subtitle (GtkHeaderBar *bar,
                             const gchar *subtitle);

Sets the subtitle of the GtkHeaderBar. The title should give a user an additional detail to help him identify the current view.

Note that GtkHeaderBar by default reserves room for the subtitle, even if none is currently set. If this is not desired, set the “has-subtitle” property to FALSE.

Parameters

bar

a GtkHeaderBar

subtitle

a subtitle, or NULL.

[allow-none]

Since: 3.10

gtk_header_bar_get_subtitle ()

const gchar *
gtk_header_bar_get_subtitle (GtkHeaderBar *bar);

Retrieves the subtitle of the header. See gtk_header_bar_set_subtitle().

Parameters

bar

a GtkHeaderBar

Returns

the subtitle of the header, or NULL if none has been set explicitly. The returned string is owned by the widget and must not be modified or freed.

[nullable]

Since: 3.10

gtk_header_bar_set_has_subtitle ()

void
gtk_header_bar_set_has_subtitle (GtkHeaderBar *bar,
                                 gboolean setting);

Sets whether the header bar should reserve space for a subtitle, even if none is currently set.

Parameters

bar

a GtkHeaderBar

setting

TRUE to reserve space for a subtitle

Since: 3.12

gtk_header_bar_get_has_subtitle ()

gboolean
gtk_header_bar_get_has_subtitle (GtkHeaderBar *bar);

Retrieves whether the header bar reserves space for a subtitle, regardless if one is currently set or not.

Parameters

bar

a GtkHeaderBar

Returns

TRUE if the header bar reserves space for a subtitle

Since: 3.12

gtk_header_bar_set_custom_title ()

void
gtk_header_bar_set_custom_title (GtkHeaderBar *bar,
                                 GtkWidget *title_widget);

Sets a custom title for the GtkHeaderBar.

The title should help a user identify the current view. This supersedes any title set by gtk_header_bar_set_title() or gtk_header_bar_set_subtitle(). To achieve the same style as the builtin title and subtitle, use the “title” and “subtitle” style classes.

You should set the custom title to NULL, for the header title label to be visible again.

Parameters

bar

a GtkHeaderBar

title_widget

a custom widget to use for a title.

[allow-none]

Since: 3.10

gtk_header_bar_get_custom_title ()

GtkWidget *
gtk_header_bar_get_custom_title (GtkHeaderBar *bar);

Retrieves the custom title widget of the header. See gtk_header_bar_set_custom_title().

Parameters

bar

a GtkHeaderBar

Returns

the custom title widget of the header, or NULL if none has been set explicitly.

[nullable][transfer none]

Since: 3.10

gtk_header_bar_pack_start ()

void
gtk_header_bar_pack_start (GtkHeaderBar *bar,
                           GtkWidget *child);

Adds child to bar , packed with reference to the start of the bar .

Parameters

bar

A GtkHeaderBar

child

the GtkWidget to be added to bar

Since: 3.10

gtk_header_bar_pack_end ()

void
gtk_header_bar_pack_end (GtkHeaderBar *bar,
                         GtkWidget *child);

Adds child to bar , packed with reference to the end of the bar .

Parameters

bar

A GtkHeaderBar

child

the GtkWidget to be added to bar

Since: 3.10

gtk_header_bar_set_show_close_button ()

void
gtk_header_bar_set_show_close_button (GtkHeaderBar *bar,
                                      gboolean setting);

Sets whether this header bar shows the standard window decorations, including close, maximize, and minimize.

Parameters

bar

a GtkHeaderBar

setting

TRUE to show standard window decorations

Since: 3.10

gtk_header_bar_get_show_close_button ()

gboolean
gtk_header_bar_get_show_close_button (GtkHeaderBar *bar);

Returns whether this header bar shows the standard window decorations.

Parameters

bar

a GtkHeaderBar

Returns

TRUE if the decorations are shown

Since: 3.10

gtk_header_bar_set_decoration_layout ()

void
gtk_header_bar_set_decoration_layout (GtkHeaderBar *bar,
                                      const gchar *layout);

Sets the decoration layout for this header bar, overriding the “gtk-decoration-layout” setting.

There can be valid reasons for overriding the setting, such as a header bar design that does not allow for buttons to take room on the right, or only offers room for a single close button. Split header bars are another example for overriding the setting.

The format of the string is button names, separated by commas. A colon separates the buttons that should appear on the left from those on the right. Recognized button names are minimize, maximize, close, icon (the window icon) and menu (a menu button for the fallback app menu).

For example, “menu:minimize,maximize,close” specifies a menu on the left, and minimize, maximize and close buttons on the right.

Parameters

bar

a GtkHeaderBar

layout

a decoration layout, or NULL to unset the layout.

[allow-none]

Since: 3.12

gtk_header_bar_get_decoration_layout ()

const gchar *
gtk_header_bar_get_decoration_layout (GtkHeaderBar *bar);

Gets the decoration layout set with gtk_header_bar_set_decoration_layout().

Parameters

bar

a GtkHeaderBar

Returns

the decoration layout

Since: 3.12

Types and Values

struct GtkHeaderBar

struct GtkHeaderBar;

Property Details

The “custom-title” property

  “custom-title”             GtkWidget *

Custom title widget to display.

Owner: GtkHeaderBar

Flags: Read / Write

The “decoration-layout” property

  “decoration-layout”        char *

The decoration layout for buttons. If this property is not set, the “gtk-decoration-layout” setting is used.

See gtk_header_bar_set_decoration_layout() for information about the format of this string.

Owner: GtkHeaderBar

Flags: Read / Write

Default value: NULL

Since: 3.12

The “decoration-layout-set” property

  “decoration-layout-set”    gboolean

Set to TRUE if “decoration-layout” is set.

Owner: GtkHeaderBar

Flags: Read / Write

Default value: FALSE

Since: 3.12

The “has-subtitle” property

  “has-subtitle”             gboolean

If TRUE, reserve space for a subtitle, even if none is currently set.

Owner: GtkHeaderBar

Flags: Read / Write

Default value: TRUE

Since: 3.12

The “show-close-button” property

  “show-close-button”        gboolean

Whether to show window decorations.

Which buttons are actually shown and where is determined by the “decoration-layout” property, and by the state of the window (e.g. a close button will not be shown if the window can't be closed).

Owner: GtkHeaderBar

Flags: Read / Write

Default value: FALSE

The “spacing” property

  “spacing”                  int

The amount of space between children.

Owner: GtkHeaderBar

Flags: Read / Write

Allowed values: >= 0

Default value: 6

The “subtitle” property

  “subtitle”                 char *

The subtitle to display.

Owner: GtkHeaderBar

Flags: Read / Write

Default value: NULL

The “title” property

  “title”                    char *

The title to display.

Owner: GtkHeaderBar

Flags: Read / Write

Default value: NULL

Child Property Details

The “pack-type” child property

  “pack-type”                GtkPackType

A GtkPackType indicating whether the child is packed with reference to the start or end of the parent.

Owner: GtkHeaderBar

Flags: Read / Write

Default value: GTK_PACK_START

The “position” child property

  “position”                 int

The index of the child in the parent.

Owner: GtkHeaderBar

Flags: Read / Write

Allowed values: >= -1

Default value: 0

See Also

GtkBox, GtkActionBar

© 2005–2020 The GNOME Project
Licensed under the GNU Lesser General Public License version 2.1 or later.
https://developer.gnome.org/gtk3/3.24/GtkHeaderBar.html