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gtk2/gtk/gtkheaderbar.c
Timm Bäder 7de076481e headerbar: Fix end-packed child order 
We pack from right to left there.
2019-09-21 09:41:53 +02:00

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/*
* Copyright (c) 2013 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "gtkheaderbarprivate.h"
#include "gtkbox.h"
#include "gtkbutton.h"
#include "gtkbuildable.h"
#include "gtkcenterlayout.h"
#include "gtkcontainerprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkimage.h"
#include "gtkintl.h"
#include "gtklabel.h"
#include "gtkmenubutton.h"
#include "gtkprivate.h"
#include "gtkseparator.h"
#include "gtksizerequest.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkwindowprivate.h"
#include "gtknative.h"
#include "gtkmenubuttonprivate.h"
#include "a11y/gtkcontaineraccessible.h"
#include <string.h>
/**
* SECTION:gtkheaderbar
* @Short_description: A box with a centered child
* @Title: GtkHeaderBar
* @See_also: #GtkBox, #GtkActionBar
*
* 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.
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* headerbar
* ├── box.start
* │ ╰── box
* │ ├── [image.titlebutton.icon]
* │ ├── [menubutton.titlebutton.appmenu]
* │ ├── [button.titlebutton.minimize]
* │ ├── [button.titlebutton.maximize]
* │ ╰── [button.titlebutton.close]
* ├── [Custom Title]
* ╰── box.end
* ]|
*
* A #GtkHeaderBar's CSS node is called headerbar. It contains two box subnodes at the start
* and end of the headerbar, as well as a center node that represents the title.
*
* The titlebuttons get their own box subnode, either in the start box or in the end box.
* Which of the title buttons exist and where they are placed exactly depends on the
* desktop environment.
*/
#define MIN_TITLE_CHARS 5
typedef struct _GtkHeaderBarPrivate GtkHeaderBarPrivate;
typedef struct _GtkHeaderBarClass GtkHeaderBarClass;
struct _GtkHeaderBar
{
GtkContainer container;
};
struct _GtkHeaderBarClass
{
GtkContainerClass parent_class;
};
struct _GtkHeaderBarPrivate
{
GtkWidget *start_box;
GtkWidget *end_box;
gchar *title;
gchar *subtitle;
GtkWidget *title_label;
GtkWidget *subtitle_label;
GtkWidget *label_box;
GtkWidget *label_sizing_box;
GtkWidget *subtitle_sizing_label;
GtkWidget *custom_title;
gboolean has_subtitle;
gboolean show_title_buttons;
gchar *decoration_layout;
gboolean decoration_layout_set;
gboolean track_default_decoration;
GtkWidget *titlebar_start_box;
GtkWidget *titlebar_end_box;
GtkWidget *titlebar_start_separator;
GtkWidget *titlebar_end_separator;
GtkWidget *titlebar_icon;
GdkSurfaceState state;
guint shows_app_menu : 1;
};
enum {
PROP_0,
PROP_TITLE,
PROP_SUBTITLE,
PROP_HAS_SUBTITLE,
PROP_CUSTOM_TITLE,
PROP_SHOW_TITLE_BUTTONS,
PROP_DECORATION_LAYOUT,
PROP_DECORATION_LAYOUT_SET,
LAST_PROP
};
static GParamSpec *header_bar_props[LAST_PROP] = { NULL, };
static void gtk_header_bar_buildable_init (GtkBuildableIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkHeaderBar, gtk_header_bar, GTK_TYPE_CONTAINER,
G_ADD_PRIVATE (GtkHeaderBar)
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_header_bar_buildable_init));
static void
init_sizing_box (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkWidget *w;
GtkStyleContext *context;
/* We use this box to always request size for the two labels (title
* and subtitle) as if they were always visible, but then allocate
* the real label box with its actual size, to keep it center-aligned
* in case we have only the title.
*/
w = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
priv->label_sizing_box = g_object_ref_sink (w);
w = gtk_label_new (NULL);
context = gtk_widget_get_style_context (w);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TITLE);
gtk_container_add (GTK_CONTAINER (priv->label_sizing_box), w);
gtk_label_set_wrap (GTK_LABEL (w), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (w), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (w), PANGO_ELLIPSIZE_END);
gtk_label_set_width_chars (GTK_LABEL (w), MIN_TITLE_CHARS);
w = gtk_label_new (NULL);
context = gtk_widget_get_style_context (w);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SUBTITLE);
gtk_container_add (GTK_CONTAINER (priv->label_sizing_box), w);
gtk_label_set_wrap (GTK_LABEL (w), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (w), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (w), PANGO_ELLIPSIZE_END);
gtk_widget_set_visible (w, priv->has_subtitle || (priv->subtitle && priv->subtitle[0]));
priv->subtitle_sizing_label = w;
}
static GtkWidget *
create_title_box (const char *title,
const char *subtitle,
GtkWidget **ret_title_label,
GtkWidget **ret_subtitle_label)
{
GtkWidget *label_box;
GtkWidget *title_label;
GtkWidget *subtitle_label;
GtkStyleContext *context;
label_box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_set_valign (label_box, GTK_ALIGN_CENTER);
title_label = gtk_label_new (title);
context = gtk_widget_get_style_context (title_label);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TITLE);
gtk_label_set_wrap (GTK_LABEL (title_label), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (title_label), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (title_label), PANGO_ELLIPSIZE_END);
gtk_container_add (GTK_CONTAINER (label_box), title_label);
gtk_label_set_width_chars (GTK_LABEL (title_label), MIN_TITLE_CHARS);
subtitle_label = gtk_label_new (subtitle);
context = gtk_widget_get_style_context (subtitle_label);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SUBTITLE);
gtk_label_set_wrap (GTK_LABEL (subtitle_label), FALSE);
gtk_label_set_single_line_mode (GTK_LABEL (subtitle_label), TRUE);
gtk_label_set_ellipsize (GTK_LABEL (subtitle_label), PANGO_ELLIPSIZE_END);
gtk_container_add (GTK_CONTAINER (label_box), subtitle_label);
gtk_widget_set_visible (subtitle_label, subtitle && subtitle[0]);
if (ret_title_label)
*ret_title_label = title_label;
if (ret_subtitle_label)
*ret_subtitle_label = subtitle_label;
return label_box;
}
gboolean
_gtk_header_bar_update_window_icon (GtkHeaderBar *bar,
GtkWindow *window)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GdkPaintable *paintable;
gint scale;
if (priv->titlebar_icon == NULL)
return FALSE;
scale = gtk_widget_get_scale_factor (priv->titlebar_icon);
if (GTK_IS_BUTTON (gtk_widget_get_parent (priv->titlebar_icon)))
paintable = gtk_window_get_icon_for_size (window, 16 * scale);
else
paintable = gtk_window_get_icon_for_size (window, 20 * scale);
if (paintable)
{
gtk_image_set_from_paintable (GTK_IMAGE (priv->titlebar_icon), paintable);
g_object_unref (paintable);
gtk_widget_show (priv->titlebar_icon);
return TRUE;
}
return FALSE;
}
static void
_gtk_header_bar_update_separator_visibility (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
gboolean have_visible_at_start = FALSE;
gboolean have_visible_at_end = FALSE;
GList *l;
GList *children;
children = gtk_container_get_children (GTK_CONTAINER (priv->start_box));
for (l = children; l; l = l->next)
{
if (l->data != priv->titlebar_start_box && gtk_widget_get_visible (l->data))
have_visible_at_start = TRUE;
}
g_list_free (children);
children = gtk_container_get_children (GTK_CONTAINER (priv->end_box));
for (l = children; l; l = l->next)
{
if (l->data != priv->titlebar_end_box && gtk_widget_get_visible (l->data))
have_visible_at_end = TRUE;
}
g_list_free (children);
if (priv->titlebar_start_separator != NULL)
gtk_widget_set_visible (priv->titlebar_start_separator, have_visible_at_start);
if (priv->titlebar_end_separator != NULL)
gtk_widget_set_visible (priv->titlebar_end_separator, have_visible_at_end);
}
void
_gtk_header_bar_update_window_buttons (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkWidget *widget = GTK_WIDGET (bar);
GtkWidget *toplevel;
GtkWindow *window;
gchar *layout_desc;
gchar **tokens, **t;
gint i, j;
GMenuModel *menu;
gboolean shown_by_shell;
gboolean is_sovereign_window;
if (!gtk_widget_get_realized (widget))
return;
toplevel = GTK_WIDGET (gtk_widget_get_root (widget));
if (!GTK_IS_WINDOW (toplevel))
return;
if (priv->titlebar_start_box)
{
gtk_widget_unparent (priv->titlebar_start_box);
priv->titlebar_start_box = NULL;
priv->titlebar_start_separator = NULL;
}
if (priv->titlebar_end_box)
{
gtk_widget_unparent (priv->titlebar_end_box);
priv->titlebar_end_box = NULL;
priv->titlebar_end_separator = NULL;
}
priv->titlebar_icon = NULL;
priv->shows_app_menu = FALSE;
if (!priv->show_title_buttons)
return;
g_object_get (gtk_widget_get_settings (widget),
"gtk-shell-shows-app-menu", &shown_by_shell,
"gtk-decoration-layout", &layout_desc,
NULL);
if (priv->decoration_layout_set)
{
g_free (layout_desc);
layout_desc = g_strdup (priv->decoration_layout);
}
window = GTK_WINDOW (toplevel);
if (!shown_by_shell && gtk_window_get_application (window))
menu = gtk_application_get_app_menu (gtk_window_get_application (window));
else
menu = NULL;
is_sovereign_window = (!gtk_window_get_modal (window) &&
gtk_window_get_transient_for (window) == NULL &&
gtk_window_get_type_hint (window) == GDK_SURFACE_TYPE_HINT_NORMAL);
tokens = g_strsplit (layout_desc, ":", 2);
if (tokens)
{
for (i = 0; i < 2; i++)
{
GtkWidget *box;
GtkWidget *separator;
int n_children = 0;
if (tokens[i] == NULL)
break;
t = g_strsplit (tokens[i], ",", -1);
separator = gtk_separator_new (GTK_ORIENTATION_VERTICAL);
gtk_style_context_add_class (gtk_widget_get_style_context (separator), "titlebutton");
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
for (j = 0; t[j]; j++)
{
GtkWidget *button = NULL;
GtkWidget *image = NULL;
AtkObject *accessible;
if (strcmp (t[j], "icon") == 0 &&
is_sovereign_window)
{
button = gtk_image_new ();
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
priv->titlebar_icon = button;
gtk_style_context_add_class (gtk_widget_get_style_context (button), "titlebutton");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "icon");
gtk_widget_set_size_request (button, 20, 20);
if (!_gtk_header_bar_update_window_icon (bar, window))
{
gtk_widget_destroy (button);
priv->titlebar_icon = NULL;
button = NULL;
}
}
else if (strcmp (t[j], "menu") == 0 &&
menu != NULL &&
is_sovereign_window)
{
button = gtk_menu_button_new ();
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
gtk_menu_button_set_menu_model (GTK_MENU_BUTTON (button), menu);
gtk_menu_button_set_use_popover (GTK_MENU_BUTTON (button), TRUE);
gtk_style_context_add_class (gtk_widget_get_style_context (button), "titlebutton");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "appmenu");
image = gtk_image_new ();
gtk_menu_button_add_child (GTK_MENU_BUTTON (button), image);
gtk_widget_set_can_focus (button, FALSE);
accessible = gtk_widget_get_accessible (button);
if (GTK_IS_ACCESSIBLE (accessible))
atk_object_set_name (accessible, _("Application menu"));
priv->titlebar_icon = image;
if (!_gtk_header_bar_update_window_icon (bar, window))
gtk_image_set_from_icon_name (GTK_IMAGE (priv->titlebar_icon), "application-x-executable-symbolic");
priv->shows_app_menu = TRUE;
}
else if (strcmp (t[j], "minimize") == 0 &&
is_sovereign_window)
{
button = gtk_button_new ();
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
gtk_style_context_add_class (gtk_widget_get_style_context (button), "titlebutton");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "minimize");
image = gtk_image_new_from_icon_name ("window-minimize-symbolic");
g_object_set (image, "use-fallback", TRUE, NULL);
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_set_can_focus (button, FALSE);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (gtk_window_iconify), window);
accessible = gtk_widget_get_accessible (button);
if (GTK_IS_ACCESSIBLE (accessible))
atk_object_set_name (accessible, _("Minimize"));
}
else if (strcmp (t[j], "maximize") == 0 &&
gtk_window_get_resizable (window) &&
is_sovereign_window)
{
const gchar *icon_name;
gboolean maximized = gtk_window_is_maximized (window);
icon_name = maximized ? "window-restore-symbolic" : "window-maximize-symbolic";
button = gtk_button_new ();
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
gtk_style_context_add_class (gtk_widget_get_style_context (button), "titlebutton");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "maximize");
image = gtk_image_new_from_icon_name (icon_name);
g_object_set (image, "use-fallback", TRUE, NULL);
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_set_can_focus (button, FALSE);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (_gtk_window_toggle_maximized), window);
accessible = gtk_widget_get_accessible (button);
if (GTK_IS_ACCESSIBLE (accessible))
atk_object_set_name (accessible, maximized ? _("Restore") : _("Maximize"));
}
else if (strcmp (t[j], "close") == 0 &&
gtk_window_get_deletable (window))
{
button = gtk_button_new ();
gtk_widget_set_valign (button, GTK_ALIGN_CENTER);
image = gtk_image_new_from_icon_name ("window-close-symbolic");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "titlebutton");
gtk_style_context_add_class (gtk_widget_get_style_context (button), "close");
g_object_set (image, "use-fallback", TRUE, NULL);
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_set_can_focus (button, FALSE);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (gtk_window_close), window);
accessible = gtk_widget_get_accessible (button);
if (GTK_IS_ACCESSIBLE (accessible))
atk_object_set_name (accessible, _("Close"));
}
if (button)
{
gtk_container_add (GTK_CONTAINER (box), button);
n_children ++;
}
}
g_strfreev (t);
if (n_children == 0)
{
g_object_ref_sink (box);
g_object_unref (box);
g_object_ref_sink (separator);
g_object_unref (separator);
continue;
}
gtk_container_add (GTK_CONTAINER (box), separator);
if (i == 1)
gtk_box_reorder_child_after (GTK_BOX (box), separator, NULL);
if (i == 0)
gtk_style_context_add_class (gtk_widget_get_style_context (box), GTK_STYLE_CLASS_LEFT);
else
gtk_style_context_add_class (gtk_widget_get_style_context (box), GTK_STYLE_CLASS_RIGHT);
if (i == 0)
{
priv->titlebar_start_box = box;
priv->titlebar_start_separator = separator;
gtk_container_add (GTK_CONTAINER (priv->start_box), box);
}
else
{
priv->titlebar_end_box = box;
priv->titlebar_end_separator = separator;
gtk_container_add (GTK_CONTAINER (priv->end_box), box);
}
}
g_strfreev (tokens);
}
g_free (layout_desc);
_gtk_header_bar_update_separator_visibility (bar);
}
gboolean
_gtk_header_bar_shows_app_menu (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
return priv->show_title_buttons && priv->shows_app_menu;
}
static void
update_default_decoration (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkLayoutManager *layout = gtk_widget_get_layout_manager (GTK_WIDGET (bar));
GtkStyleContext *context;
gboolean have_children = FALSE;
/* Check whether we have any child widgets that we didn't add ourselves */
if (gtk_center_layout_get_center_widget (GTK_CENTER_LAYOUT (layout)) != NULL)
{
have_children = TRUE;
}
else
{
GtkWidget *w;
for (w = _gtk_widget_get_first_child (priv->start_box);
w != NULL;
w = _gtk_widget_get_next_sibling (w))
{
if (w != priv->titlebar_start_box)
{
have_children = TRUE;
break;
}
}
if (!have_children)
for (w = _gtk_widget_get_first_child (priv->end_box);
w != NULL;
w = _gtk_widget_get_next_sibling (w))
{
if (w != priv->titlebar_end_box)
{
have_children = TRUE;
break;
}
}
}
context = gtk_widget_get_style_context (GTK_WIDGET (bar));
if (have_children || priv->custom_title != NULL)
gtk_style_context_remove_class (context, "default-decoration");
else
gtk_style_context_add_class (context, "default-decoration");
}
void
_gtk_header_bar_track_default_decoration (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
priv->track_default_decoration = TRUE;
update_default_decoration (bar);
}
static void
construct_label_box (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkLayoutManager *layout = gtk_widget_get_layout_manager (GTK_WIDGET (bar));
g_assert (priv->label_box == NULL);
priv->label_box = create_title_box (priv->title,
priv->subtitle,
&priv->title_label,
&priv->subtitle_label);
gtk_widget_insert_after (priv->label_box, GTK_WIDGET (bar), priv->start_box);
gtk_center_layout_set_center_widget (GTK_CENTER_LAYOUT (layout), priv->label_box);
}
/**
* gtk_header_bar_set_title:
* @bar: a #GtkHeaderBar
* @title: (allow-none): a title, or %NULL
*
* 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.
*/
void
gtk_header_bar_set_title (GtkHeaderBar *bar,
const gchar *title)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
gchar *new_title;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
new_title = g_strdup (title);
g_free (priv->title);
priv->title = new_title;
if (priv->title_label != NULL)
{
gtk_label_set_label (GTK_LABEL (priv->title_label), priv->title);
gtk_widget_queue_resize (GTK_WIDGET (bar));
}
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_TITLE]);
}
/**
* gtk_header_bar_get_title:
* @bar: a #GtkHeaderBar
*
* Retrieves the title of the header. See gtk_header_bar_set_title().
*
* Returns: (nullable): 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.
*/
const gchar *
gtk_header_bar_get_title (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
return priv->title;
}
/**
* gtk_header_bar_set_subtitle:
* @bar: a #GtkHeaderBar
* @subtitle: (allow-none): a subtitle, or %NULL
*
* 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
* #GtkHeaderBar:has-subtitle property to %FALSE.
*/
void
gtk_header_bar_set_subtitle (GtkHeaderBar *bar,
const gchar *subtitle)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
gchar *new_subtitle;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
new_subtitle = g_strdup (subtitle);
g_free (priv->subtitle);
priv->subtitle = new_subtitle;
if (priv->subtitle_label != NULL)
{
gtk_label_set_label (GTK_LABEL (priv->subtitle_label), priv->subtitle);
gtk_widget_set_visible (priv->subtitle_label, priv->subtitle && priv->subtitle[0]);
gtk_widget_queue_resize (GTK_WIDGET (bar));
}
gtk_widget_set_visible (priv->subtitle_sizing_label, priv->has_subtitle || (priv->subtitle && priv->subtitle[0]));
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_SUBTITLE]);
}
/**
* gtk_header_bar_get_subtitle:
* @bar: a #GtkHeaderBar
*
* Retrieves the subtitle of the header. See gtk_header_bar_set_subtitle().
*
* Returns: (nullable): 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.
*/
const gchar *
gtk_header_bar_get_subtitle (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
return priv->subtitle;
}
/**
* gtk_header_bar_set_custom_title:
* @bar: a #GtkHeaderBar
* @title_widget: (allow-none): a custom widget to use for a title
*
* 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.
*/
void
gtk_header_bar_set_custom_title (GtkHeaderBar *bar,
GtkWidget *title_widget)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
if (title_widget)
g_return_if_fail (GTK_IS_WIDGET (title_widget));
/* No need to do anything if the custom widget stays the same */
if (priv->custom_title == title_widget)
return;
if (priv->custom_title)
{
GtkWidget *custom = priv->custom_title;
priv->custom_title = NULL;
gtk_widget_unparent (custom);
}
if (title_widget != NULL)
{
GtkLayoutManager *layout = gtk_widget_get_layout_manager (GTK_WIDGET (bar));
priv->custom_title = title_widget;
gtk_widget_insert_after (priv->custom_title, GTK_WIDGET (bar), priv->start_box);
gtk_center_layout_set_center_widget (GTK_CENTER_LAYOUT (layout), title_widget);
if (priv->label_box != NULL)
{
GtkWidget *label_box = priv->label_box;
priv->label_box = NULL;
priv->title_label = NULL;
priv->subtitle_label = NULL;
gtk_widget_unparent (label_box);
}
}
else
{
if (priv->label_box == NULL)
construct_label_box (bar);
}
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_CUSTOM_TITLE]);
}
/**
* gtk_header_bar_get_custom_title:
* @bar: a #GtkHeaderBar
*
* Retrieves the custom title widget of the header. See
* gtk_header_bar_set_custom_title().
*
* Returns: (nullable) (transfer none): the custom title widget
* of the header, or %NULL if none has been set explicitly.
*/
GtkWidget *
gtk_header_bar_get_custom_title (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
return priv->custom_title;
}
static void
gtk_header_bar_dispose (GObject *object)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (object));
if (priv->label_sizing_box)
{
gtk_widget_destroy (priv->label_sizing_box);
g_clear_object (&priv->label_sizing_box);
}
g_clear_pointer (&priv->custom_title, gtk_widget_unparent);
g_clear_pointer (&priv->label_box, gtk_widget_unparent);
g_clear_pointer (&priv->start_box, gtk_widget_unparent);
g_clear_pointer (&priv->end_box, gtk_widget_unparent);
G_OBJECT_CLASS (gtk_header_bar_parent_class)->dispose (object);
}
static void
gtk_header_bar_finalize (GObject *object)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (object));
g_free (priv->title);
g_free (priv->subtitle);
g_free (priv->decoration_layout);
G_OBJECT_CLASS (gtk_header_bar_parent_class)->finalize (object);
}
static void
gtk_header_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (object);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
switch (prop_id)
{
case PROP_TITLE:
g_value_set_string (value, priv->title);
break;
case PROP_SUBTITLE:
g_value_set_string (value, priv->subtitle);
break;
case PROP_CUSTOM_TITLE:
g_value_set_object (value, priv->custom_title);
break;
case PROP_SHOW_TITLE_BUTTONS:
g_value_set_boolean (value, gtk_header_bar_get_show_title_buttons (bar));
break;
case PROP_HAS_SUBTITLE:
g_value_set_boolean (value, gtk_header_bar_get_has_subtitle (bar));
break;
case PROP_DECORATION_LAYOUT:
g_value_set_string (value, gtk_header_bar_get_decoration_layout (bar));
break;
case PROP_DECORATION_LAYOUT_SET:
g_value_set_boolean (value, priv->decoration_layout_set);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_header_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (object);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
switch (prop_id)
{
case PROP_TITLE:
gtk_header_bar_set_title (bar, g_value_get_string (value));
break;
case PROP_SUBTITLE:
gtk_header_bar_set_subtitle (bar, g_value_get_string (value));
break;
case PROP_CUSTOM_TITLE:
gtk_header_bar_set_custom_title (bar, g_value_get_object (value));
break;
case PROP_SHOW_TITLE_BUTTONS:
gtk_header_bar_set_show_title_buttons (bar, g_value_get_boolean (value));
break;
case PROP_HAS_SUBTITLE:
gtk_header_bar_set_has_subtitle (bar, g_value_get_boolean (value));
break;
case PROP_DECORATION_LAYOUT:
gtk_header_bar_set_decoration_layout (bar, g_value_get_string (value));
break;
case PROP_DECORATION_LAYOUT_SET:
priv->decoration_layout_set = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
notify_child_cb (GObject *child,
GParamSpec *pspec,
GtkHeaderBar *bar)
{
_gtk_header_bar_update_separator_visibility (bar);
}
static void
gtk_header_bar_pack (GtkHeaderBar *bar,
GtkWidget *widget,
GtkPackType pack_type)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
if (pack_type == GTK_PACK_START)
{
gtk_container_add (GTK_CONTAINER (priv->start_box), widget);
}
else if (pack_type == GTK_PACK_END)
{
gtk_container_add (GTK_CONTAINER (priv->end_box), widget);
gtk_box_reorder_child_after (GTK_BOX (priv->end_box), widget, NULL);
}
g_signal_connect (widget, "notify::visible", G_CALLBACK (notify_child_cb), bar);
_gtk_header_bar_update_separator_visibility (bar);
if (priv->track_default_decoration)
update_default_decoration (bar);
}
static void
gtk_header_bar_add (GtkContainer *container,
GtkWidget *child)
{
gtk_header_bar_pack (GTK_HEADER_BAR (container), child, GTK_PACK_START);
}
static void
gtk_header_bar_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkLayoutManager *layout = gtk_widget_get_layout_manager (GTK_WIDGET (bar));
GtkWidget *parent;
gboolean removed = FALSE;
parent = gtk_widget_get_parent (widget);
if (parent == priv->start_box)
{
gtk_container_remove (GTK_CONTAINER (priv->start_box), widget);
removed = TRUE;
}
else if (parent == priv->end_box)
{
gtk_container_remove (GTK_CONTAINER (priv->end_box), widget);
removed = TRUE;
}
else if (parent == GTK_WIDGET (container) &&
gtk_center_layout_get_center_widget (GTK_CENTER_LAYOUT (layout)) == widget)
{
gtk_widget_unparent (widget);
removed = TRUE;
}
if (removed)
{
_gtk_header_bar_update_separator_visibility (bar);
if (priv->track_default_decoration)
update_default_decoration (bar);
}
}
static void
gtk_header_bar_forall (GtkContainer *container,
GtkCallback callback,
gpointer callback_data)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkWidget *w;
if (priv->start_box)
{
w = _gtk_widget_get_first_child (priv->start_box);
while (w != NULL)
{
GtkWidget *next = _gtk_widget_get_next_sibling (w);
if (w != priv->titlebar_start_box)
(* callback) (w, callback_data);
w = next;
}
}
if (priv->custom_title != NULL)
(* callback) (priv->custom_title, callback_data);
if (priv->end_box)
{
w = _gtk_widget_get_first_child (priv->end_box);
while (w != NULL)
{
GtkWidget *next = _gtk_widget_get_next_sibling (w);
if (w != priv->titlebar_end_box)
(* callback) (w, callback_data);
w = next;
}
}
}
static GType
gtk_header_bar_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static void surface_state_changed (GtkWidget *widget);
static void
gtk_header_bar_realize (GtkWidget *widget)
{
GtkSettings *settings;
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->realize (widget);
settings = gtk_widget_get_settings (widget);
g_signal_connect_swapped (settings, "notify::gtk-shell-shows-app-menu",
G_CALLBACK (_gtk_header_bar_update_window_buttons), widget);
g_signal_connect_swapped (settings, "notify::gtk-decoration-layout",
G_CALLBACK (_gtk_header_bar_update_window_buttons), widget);
g_signal_connect_swapped (gtk_native_get_surface (gtk_widget_get_native (widget)), "notify::state",
G_CALLBACK (surface_state_changed), widget);
_gtk_header_bar_update_window_buttons (GTK_HEADER_BAR (widget));
}
static void
gtk_header_bar_unrealize (GtkWidget *widget)
{
GtkSettings *settings;
settings = gtk_widget_get_settings (widget);
g_signal_handlers_disconnect_by_func (settings, _gtk_header_bar_update_window_buttons, widget);
g_signal_handlers_disconnect_by_func (gtk_native_get_surface (gtk_widget_get_native (widget)), surface_state_changed, widget);
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->unrealize (widget);
}
static void
surface_state_changed (GtkWidget *widget)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GdkSurfaceState changed, new_state;
new_state = gdk_surface_get_state (gtk_native_get_surface (gtk_widget_get_native (widget)));
changed = new_state ^ priv->state;
priv->state = new_state;
if (changed & (GDK_SURFACE_STATE_FULLSCREEN |
GDK_SURFACE_STATE_MAXIMIZED |
GDK_SURFACE_STATE_TILED |
GDK_SURFACE_STATE_TOP_TILED |
GDK_SURFACE_STATE_RIGHT_TILED |
GDK_SURFACE_STATE_BOTTOM_TILED |
GDK_SURFACE_STATE_LEFT_TILED))
_gtk_header_bar_update_window_buttons (bar);
}
static void
gtk_header_bar_root (GtkWidget *widget)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->root (widget);
_gtk_header_bar_update_window_buttons (bar);
}
static void
gtk_header_bar_class_init (GtkHeaderBarClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
object_class->dispose = gtk_header_bar_dispose;
object_class->finalize = gtk_header_bar_finalize;
object_class->get_property = gtk_header_bar_get_property;
object_class->set_property = gtk_header_bar_set_property;
widget_class->realize = gtk_header_bar_realize;
widget_class->unrealize = gtk_header_bar_unrealize;
widget_class->root = gtk_header_bar_root;
container_class->add = gtk_header_bar_add;
container_class->remove = gtk_header_bar_remove;
container_class->forall = gtk_header_bar_forall;
container_class->child_type = gtk_header_bar_child_type;
header_bar_props[PROP_TITLE] =
g_param_spec_string ("title",
P_("Title"),
P_("The title to display"),
NULL,
G_PARAM_READWRITE);
header_bar_props[PROP_SUBTITLE] =
g_param_spec_string ("subtitle",
P_("Subtitle"),
P_("The subtitle to display"),
NULL,
G_PARAM_READWRITE);
header_bar_props[PROP_CUSTOM_TITLE] =
g_param_spec_object ("custom-title",
P_("Custom Title"),
P_("Custom title widget to display"),
GTK_TYPE_WIDGET,
G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS);
/**
* GtkHeaderBar:show-title-buttons:
*
* Whether to show title buttons like close, minimize, maximize.
*
* Which buttons are actually shown and where is determined
* by the #GtkHeaderBar: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).
*/
header_bar_props[PROP_SHOW_TITLE_BUTTONS] =
g_param_spec_boolean ("show-title-buttons",
P_("Show title buttons"),
P_("Whether to show title buttons"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkHeaderBar:decoration-layout:
*
* The decoration layout for buttons. If this property is
* not set, the #GtkSettings:gtk-decoration-layout setting
* is used.
*
* See gtk_header_bar_set_decoration_layout() for information
* about the format of this string.
*/
header_bar_props[PROP_DECORATION_LAYOUT] =
g_param_spec_string ("decoration-layout",
P_("Decoration Layout"),
P_("The layout for window decorations"),
NULL,
GTK_PARAM_READWRITE);
/**
* GtkHeaderBar:decoration-layout-set:
*
* Set to %TRUE if #GtkHeaderBar:decoration-layout is set.
*/
header_bar_props[PROP_DECORATION_LAYOUT_SET] =
g_param_spec_boolean ("decoration-layout-set",
P_("Decoration Layout Set"),
P_("Whether the decoration-layout property has been set"),
FALSE,
GTK_PARAM_READWRITE);
/**
* GtkHeaderBar:has-subtitle:
*
* If %TRUE, reserve space for a subtitle, even if none
* is currently set.
*/
header_bar_props[PROP_HAS_SUBTITLE] =
g_param_spec_boolean ("has-subtitle",
P_("Has Subtitle"),
P_("Whether to reserve space for a subtitle"),
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, LAST_PROP, header_bar_props);
gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_PANEL);
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_CENTER_LAYOUT);
gtk_widget_class_set_css_name (widget_class, I_("headerbar"));
}
static void
gtk_header_bar_init (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkLayoutManager *layout;
priv->title = NULL;
priv->subtitle = NULL;
priv->custom_title = NULL;
priv->has_subtitle = TRUE;
priv->decoration_layout = NULL;
priv->decoration_layout_set = FALSE;
priv->shows_app_menu = FALSE;
priv->state = GDK_SURFACE_STATE_WITHDRAWN;
layout = gtk_widget_get_layout_manager (GTK_WIDGET (bar));
priv->start_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_style_context_add_class (gtk_widget_get_style_context (priv->start_box), "start");
gtk_widget_set_parent (priv->start_box, GTK_WIDGET (bar));
gtk_center_layout_set_start_widget (GTK_CENTER_LAYOUT (layout), priv->start_box);
priv->end_box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_style_context_add_class (gtk_widget_get_style_context (priv->end_box), "end");
gtk_widget_set_parent (priv->end_box, GTK_WIDGET (bar));
gtk_center_layout_set_end_widget (GTK_CENTER_LAYOUT (layout), priv->end_box);
init_sizing_box (bar);
construct_label_box (bar);
}
static GtkBuildableIface *parent_buildable_iface;
static void
gtk_header_bar_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type)
{
if (g_strcmp0 (type, "title") == 0)
gtk_header_bar_set_custom_title (GTK_HEADER_BAR (buildable), GTK_WIDGET (child));
else if (g_strcmp0 (type, "start") == 0)
gtk_header_bar_pack_start (GTK_HEADER_BAR (buildable), GTK_WIDGET (child));
else if (g_strcmp0 (type, "end") == 0)
gtk_header_bar_pack_end (GTK_HEADER_BAR (buildable), GTK_WIDGET (child));
else
parent_buildable_iface->add_child (buildable, builder, child, type);
}
static void
gtk_header_bar_buildable_init (GtkBuildableIface *iface)
{
parent_buildable_iface = g_type_interface_peek_parent (iface);
iface->add_child = gtk_header_bar_buildable_add_child;
}
/**
* gtk_header_bar_pack_start:
* @bar: A #GtkHeaderBar
* @child: the #GtkWidget to be added to @bar
*
* Adds @child to @bar, packed with reference to the
* start of the @bar.
*/
void
gtk_header_bar_pack_start (GtkHeaderBar *bar,
GtkWidget *child)
{
gtk_header_bar_pack (bar, child, GTK_PACK_START);
}
/**
* gtk_header_bar_pack_end:
* @bar: A #GtkHeaderBar
* @child: the #GtkWidget to be added to @bar
*
* Adds @child to @bar, packed with reference to the
* end of the @bar.
*/
void
gtk_header_bar_pack_end (GtkHeaderBar *bar,
GtkWidget *child)
{
gtk_header_bar_pack (bar, child, GTK_PACK_END);
}
/**
* gtk_header_bar_new:
*
* Creates a new #GtkHeaderBar widget.
*
* Returns: a new #GtkHeaderBar
*/
GtkWidget *
gtk_header_bar_new (void)
{
return GTK_WIDGET (g_object_new (GTK_TYPE_HEADER_BAR, NULL));
}
/**
* gtk_header_bar_get_show_title_buttons:
* @bar: a #GtkHeaderBar
*
* Returns whether this header bar shows the standard window
* title buttons.
*
* Returns: %TRUE if title buttons are shown
*/
gboolean
gtk_header_bar_get_show_title_buttons (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv;
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), FALSE);
priv = gtk_header_bar_get_instance_private (bar);
return priv->show_title_buttons;
}
/**
* gtk_header_bar_set_show_title_buttons:
* @bar: a #GtkHeaderBar
* @setting: %TRUE to show standard title buttons
*
* Sets whether this header bar shows the standard window
* title buttons including close, maximize, and minimize.
*/
void
gtk_header_bar_set_show_title_buttons (GtkHeaderBar *bar,
gboolean setting)
{
GtkHeaderBarPrivate *priv;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
priv = gtk_header_bar_get_instance_private (bar);
setting = setting != FALSE;
if (priv->show_title_buttons == setting)
return;
priv->show_title_buttons = setting;
_gtk_header_bar_update_window_buttons (bar);
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_SHOW_TITLE_BUTTONS]);
}
/**
* gtk_header_bar_set_has_subtitle:
* @bar: a #GtkHeaderBar
* @setting: %TRUE to reserve space for a subtitle
*
* Sets whether the header bar should reserve space
* for a subtitle, even if none is currently set.
*/
void
gtk_header_bar_set_has_subtitle (GtkHeaderBar *bar,
gboolean setting)
{
GtkHeaderBarPrivate *priv;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
priv = gtk_header_bar_get_instance_private (bar);
setting = setting != FALSE;
if (priv->has_subtitle == setting)
return;
priv->has_subtitle = setting;
gtk_widget_set_visible (priv->subtitle_sizing_label, setting || (priv->subtitle && priv->subtitle[0]));
gtk_widget_queue_resize (GTK_WIDGET (bar));
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_HAS_SUBTITLE]);
}
/**
* gtk_header_bar_get_has_subtitle:
* @bar: a #GtkHeaderBar
*
* Retrieves whether the header bar reserves space for
* a subtitle, regardless if one is currently set or not.
*
* Returns: %TRUE if the header bar reserves space
* for a subtitle
*/
gboolean
gtk_header_bar_get_has_subtitle (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv;
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), FALSE);
priv = gtk_header_bar_get_instance_private (bar);
return priv->has_subtitle;
}
/**
* gtk_header_bar_set_decoration_layout:
* @bar: a #GtkHeaderBar
* @layout: (allow-none): a decoration layout, or %NULL to
* unset the layout
*
* Sets the decoration layout for this header bar, overriding
* the #GtkSettings: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.
*/
void
gtk_header_bar_set_decoration_layout (GtkHeaderBar *bar,
const gchar *layout)
{
GtkHeaderBarPrivate *priv;
g_return_if_fail (GTK_IS_HEADER_BAR (bar));
priv = gtk_header_bar_get_instance_private (bar);
g_free (priv->decoration_layout);
priv->decoration_layout = g_strdup (layout);
priv->decoration_layout_set = (layout != NULL);
_gtk_header_bar_update_window_buttons (bar);
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_DECORATION_LAYOUT]);
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_DECORATION_LAYOUT_SET]);
}
/**
* gtk_header_bar_get_decoration_layout:
* @bar: a #GtkHeaderBar
*
* Gets the decoration layout set with
* gtk_header_bar_set_decoration_layout().
*
* Returns: the decoration layout
*/
const gchar *
gtk_header_bar_get_decoration_layout (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv;
g_return_val_if_fail (GTK_IS_HEADER_BAR (bar), NULL);
priv = gtk_header_bar_get_instance_private (bar);
return priv->decoration_layout;
}
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