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gtk2/gtk/gtkheaderbar.c
Olivier Fourdan 7c397c621c headerbar: do not show buttons for modals/transients 
GtkHeadeBar checks the window type hint to determine if the regular
buttons such as menu, maximize or iconify should be visible in the
header bar.

However, an application may very well use a "normal" toplevel window and
set it transient and modal afterwards. In such a case, the iconify
button would remain visible, and the user can hide the window, but being
a modal, the parent window would remain insensitive.

Check for the window type, modality and transient relationship to decide
whether or not the regular toplevel buttons should be visible in the
header bar.

https://bugzilla.gnome.org/show_bug.cgi?id=767052
2016-06-01 09:47:23 +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 "gtkheaderbar.h"
#include "gtkheaderbarprivate.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkwindowprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkcontainerprivate.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.
*/
#define DEFAULT_SPACING 6
#define MIN_TITLE_CHARS 5
struct _GtkHeaderBarPrivate
{
gchar *title;
gchar *subtitle;
GtkWidget *title_label;
GtkWidget *subtitle_label;
GtkWidget *label_box;
GtkWidget *label_sizing_box;
GtkWidget *subtitle_sizing_label;
GtkWidget *custom_title;
gint spacing;
gboolean has_subtitle;
GList *children;
gboolean shows_wm_decorations;
gchar *decoration_layout;
gboolean decoration_layout_set;
GtkWidget *titlebar_start_box;
GtkWidget *titlebar_end_box;
GtkWidget *titlebar_start_separator;
GtkWidget *titlebar_end_separator;
GtkWidget *titlebar_icon;
GtkCssGadget *gadget;
};
typedef struct _Child Child;
struct _Child
{
GtkWidget *widget;
GtkPackType pack_type;
};
enum {
PROP_0,
PROP_TITLE,
PROP_SUBTITLE,
PROP_HAS_SUBTITLE,
PROP_CUSTOM_TITLE,
PROP_SPACING,
PROP_SHOW_CLOSE_BUTTON,
PROP_DECORATION_LAYOUT,
PROP_DECORATION_LAYOUT_SET,
LAST_PROP
};
enum {
CHILD_PROP_0,
CHILD_PROP_PACK_TYPE,
CHILD_PROP_POSITION
};
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.
*/
priv->label_sizing_box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_show (priv->label_sizing_box);
w = gtk_label_new (NULL);
gtk_widget_show (w);
context = gtk_widget_get_style_context (w);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TITLE);
gtk_box_pack_start (GTK_BOX (priv->label_sizing_box), w, FALSE, FALSE, 0);
gtk_label_set_line_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_box_pack_start (GTK_BOX (priv->label_sizing_box), w, FALSE, FALSE, 0);
gtk_label_set_line_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);
gtk_widget_show (label_box);
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_line_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_box_pack_start (GTK_BOX (label_box), title_label, FALSE, FALSE, 0);
gtk_widget_show (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_line_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_box_pack_start (GTK_BOX (label_box), subtitle_label, FALSE, FALSE, 0);
gtk_widget_set_no_show_all (subtitle_label, TRUE);
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);
GdkPixbuf *pixbuf;
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)))
pixbuf = gtk_window_get_icon_for_size (window, scale * 16);
else
pixbuf = gtk_window_get_icon_for_size (window, scale * 20);
if (pixbuf)
{
cairo_surface_t *surface;
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, scale, gtk_widget_get_window (priv->titlebar_icon));
gtk_image_set_from_surface (GTK_IMAGE (priv->titlebar_icon), surface);
cairo_surface_destroy (surface);
g_object_unref (pixbuf);
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;
for (l = priv->children; l != NULL; l = l->next)
{
Child *child = l->data;
if (gtk_widget_get_visible (child->widget))
{
if (child->pack_type == GTK_PACK_START)
have_visible_at_start = TRUE;
else
have_visible_at_end = TRUE;
}
}
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), *toplevel;
GtkWindow *window;
GtkTextDirection direction;
gchar *layout_desc;
gchar **tokens, **t;
gint i, j;
GMenuModel *menu;
gboolean shown_by_shell;
gboolean is_sovereign_window;
toplevel = gtk_widget_get_toplevel (widget);
if (!gtk_widget_is_toplevel (toplevel))
return;
if (priv->titlebar_start_box)
{
gtk_widget_destroy (priv->titlebar_start_box);
priv->titlebar_start_box = NULL;
priv->titlebar_start_separator = NULL;
}
if (priv->titlebar_end_box)
{
gtk_widget_destroy (priv->titlebar_end_box);
priv->titlebar_end_box = NULL;
priv->titlebar_end_separator = NULL;
}
priv->titlebar_icon = NULL;
if (!priv->shows_wm_decorations)
return;
direction = gtk_widget_get_direction (widget);
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_WINDOW_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_widget_set_no_show_all (separator, TRUE);
gtk_style_context_add_class (gtk_widget_get_style_context (separator), "titlebutton");
if (i == 0)
priv->titlebar_start_separator = separator;
else
priv->titlebar_end_separator = separator;
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, priv->spacing);
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_widget_set_size_request (button, 20, 20);
gtk_widget_show (button);
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");
image = gtk_image_new ();
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_set_can_focus (button, FALSE);
gtk_widget_show_all (button);
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), "process-stop-symbolic", GTK_ICON_SIZE_MENU);
}
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", GTK_ICON_SIZE_MENU);
g_object_set (image, "use-fallback", TRUE, NULL);
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_set_can_focus (button, FALSE);
gtk_widget_show_all (button);
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, GTK_ICON_SIZE_MENU);
g_object_set (image, "use-fallback", TRUE, NULL);
gtk_container_add (GTK_CONTAINER (button), image);
gtk_widget_set_can_focus (button, FALSE);
gtk_widget_show_all (button);
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_ICON_SIZE_MENU);
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);
gtk_widget_show_all (button);
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_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);
n_children ++;
}
}
g_strfreev (t);
if (n_children == 0)
{
gtk_widget_destroy (box);
continue;
}
gtk_box_pack_start (GTK_BOX (box), separator, FALSE, FALSE, 0);
if (i == 1)
gtk_box_reorder_child (GTK_BOX (box), separator, 0);
if ((direction == GTK_TEXT_DIR_LTR && i == 0) ||
(direction == GTK_TEXT_DIR_RTL && i == 1))
{
gtk_style_context_add_class (gtk_widget_get_style_context (box), GTK_STYLE_CLASS_LEFT);
gtk_css_node_insert_after (gtk_widget_get_css_node (GTK_WIDGET (bar)),
gtk_widget_get_css_node (box),
NULL);
}
else
{
gtk_style_context_add_class (gtk_widget_get_style_context (box), GTK_STYLE_CLASS_RIGHT);
gtk_css_node_insert_before (gtk_widget_get_css_node (GTK_WIDGET (bar)),
gtk_widget_get_css_node (box),
NULL);
}
gtk_widget_show (box);
gtk_widget_set_parent (box, GTK_WIDGET (bar));
if (i == 0)
priv->titlebar_start_box = box;
else
priv->titlebar_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);
GtkWindow *window;
gchar *layout_desc;
gboolean ret;
window = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (bar)));
gtk_widget_style_get (GTK_WIDGET (window),
"decoration-button-layout", &layout_desc,
NULL);
ret = priv->shows_wm_decorations &&
(layout_desc && strstr (layout_desc, "menu"));
g_free (layout_desc);
return ret;
}
/* As an intended side effect, this function allows @child
* to be the title/label box */
static void
gtk_header_bar_reorder_css_node (GtkHeaderBar *bar,
GtkPackType pack_type,
GtkWidget *widget)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkWidget *previous_widget;
GList *l;
if (pack_type == GTK_PACK_START)
previous_widget = priv->titlebar_start_box;
else
previous_widget = priv->titlebar_end_box;
for (l = priv->children; l; l = l->next)
{
Child *iter = l->data;
if (iter->widget == widget)
break;
if (iter->pack_type == pack_type)
previous_widget = iter->widget;
}
if ((pack_type == GTK_PACK_START)
^ (gtk_widget_get_direction (GTK_WIDGET (bar)) == GTK_TEXT_DIR_LTR))
gtk_css_node_insert_after (gtk_widget_get_css_node (GTK_WIDGET (bar)),
gtk_widget_get_css_node (widget),
previous_widget ? gtk_widget_get_css_node (previous_widget) : NULL);
else
gtk_css_node_insert_before (gtk_widget_get_css_node (GTK_WIDGET (bar)),
gtk_widget_get_css_node (widget),
previous_widget ? gtk_widget_get_css_node (previous_widget) : NULL);
}
static void
construct_label_box (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
g_assert (priv->label_box == NULL);
priv->label_box = create_title_box (priv->title,
priv->subtitle,
&priv->title_label,
&priv->subtitle_label);
gtk_header_bar_reorder_css_node (bar, GTK_PACK_START, priv->label_box);
gtk_widget_set_parent (priv->label_box, GTK_WIDGET (bar));
}
static gint
count_visible_children (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GList *l;
Child *child;
gint n;
n = 0;
for (l = priv->children; l; l = l->next)
{
child = l->data;
if (gtk_widget_get_visible (child->widget))
n++;
}
return n;
}
static gboolean
add_child_size (GtkWidget *child,
GtkOrientation orientation,
gint *minimum,
gint *natural)
{
gint child_minimum, child_natural;
if (!gtk_widget_get_visible (child))
return FALSE;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_get_preferred_width (child, &child_minimum, &child_natural);
else
gtk_widget_get_preferred_height (child, &child_minimum, &child_natural);
if (GTK_ORIENTATION_HORIZONTAL == orientation)
{
*minimum += child_minimum;
*natural += child_natural;
}
else
{
*minimum = MAX (*minimum, child_minimum);
*natural = MAX (*natural, child_natural);
}
return TRUE;
}
static void
gtk_header_bar_get_size (GtkWidget *widget,
GtkOrientation orientation,
gint *minimum_size,
gint *natural_size)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GList *l;
gint nvis_children;
gint minimum, natural;
gint center_min, center_nat;
minimum = natural = 0;
nvis_children = 0;
for (l = priv->children; l; l = l->next)
{
Child *child = l->data;
if (add_child_size (child->widget, orientation, &minimum, &natural))
nvis_children += 1;
}
center_min = center_nat = 0;
if (priv->label_box != NULL)
{
if (orientation == GTK_ORIENTATION_HORIZONTAL)
add_child_size (priv->label_box, orientation, &center_min, &center_nat);
else
add_child_size (priv->label_sizing_box, orientation, &center_min, &center_nat);
if (_gtk_widget_get_visible (priv->label_sizing_box))
nvis_children += 1;
}
if (priv->custom_title != NULL)
{
if (add_child_size (priv->custom_title, orientation, &center_min, &center_nat))
nvis_children += 1;
}
if (priv->titlebar_start_box != NULL)
{
if (add_child_size (priv->titlebar_start_box, orientation, &minimum, &natural))
nvis_children += 1;
}
if (priv->titlebar_end_box != NULL)
{
if (add_child_size (priv->titlebar_end_box, orientation, &minimum, &natural))
nvis_children += 1;
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
minimum += center_min;
natural += center_nat;
}
else
{
minimum = MAX (minimum, center_min);
natural = MAX (natural, center_nat);
}
if (nvis_children > 0 && orientation == GTK_ORIENTATION_HORIZONTAL)
{
minimum += nvis_children * priv->spacing;
natural += nvis_children * priv->spacing;
}
*minimum_size = minimum;
*natural_size = natural;
}
static void
gtk_header_bar_compute_size_for_orientation (GtkWidget *widget,
gint avail_size,
gint *minimum_size,
gint *natural_size)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GList *children;
gint required_size = 0;
gint required_natural = 0;
gint child_size;
gint child_natural;
gint nvis_children;
nvis_children = 0;
for (children = priv->children; children != NULL; children = children->next)
{
Child *child = children->data;
if (gtk_widget_get_visible (child->widget))
{
gtk_widget_get_preferred_width_for_height (child->widget,
avail_size, &child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
nvis_children += 1;
}
}
if (priv->label_box != NULL)
{
gtk_widget_get_preferred_width (priv->label_sizing_box,
&child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
}
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_get_preferred_width (priv->custom_title,
&child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
}
if (priv->titlebar_start_box != NULL)
{
gtk_widget_get_preferred_width (priv->titlebar_start_box,
&child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
nvis_children += 1;
}
if (priv->titlebar_end_box != NULL)
{
gtk_widget_get_preferred_width (priv->titlebar_end_box,
&child_size, &child_natural);
required_size += child_size;
required_natural += child_natural;
nvis_children += 1;
}
if (nvis_children > 0)
{
required_size += nvis_children * priv->spacing;
required_natural += nvis_children * priv->spacing;
}
*minimum_size = required_size;
*natural_size = required_natural;
}
static void
gtk_header_bar_compute_size_for_opposing_orientation (GtkWidget *widget,
gint avail_size,
gint *minimum_size,
gint *natural_size)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
Child *child;
GList *children;
gint nvis_children;
gint computed_minimum = 0;
gint computed_natural = 0;
GtkRequestedSize *sizes;
GtkPackType packing;
gint size = 0;
gint i;
gint child_size;
gint child_minimum;
gint child_natural;
gint center_min, center_nat;
nvis_children = count_visible_children (bar);
if (nvis_children <= 0)
return;
sizes = g_newa (GtkRequestedSize, nvis_children);
/* Retrieve desired size for visible children */
for (i = 0, children = priv->children; children; children = children->next)
{
child = children->data;
if (gtk_widget_get_visible (child->widget))
{
gtk_widget_get_preferred_width (child->widget,
&sizes[i].minimum_size,
&sizes[i].natural_size);
size -= sizes[i].minimum_size;
sizes[i].data = child;
i += 1;
}
}
/* Bring children up to size first */
size = gtk_distribute_natural_allocation (MAX (0, avail_size), nvis_children, sizes);
/* Allocate child positions. */
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; ++packing)
{
for (i = 0, children = priv->children; children; children = children->next)
{
child = children->data;
/* If widget is not visible, skip it. */
if (!gtk_widget_get_visible (child->widget))
continue;
/* If widget is packed differently skip it, but still increment i,
* since widget is visible and will be handled in next loop
* iteration.
*/
if (child->pack_type != packing)
{
i++;
continue;
}
child_size = sizes[i].minimum_size;
gtk_widget_get_preferred_height_for_width (child->widget,
child_size, &child_minimum, &child_natural);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
i += 1;
}
center_min = center_nat = 0;
if (priv->label_box != NULL)
{
gtk_widget_get_preferred_height (priv->label_sizing_box,
&center_min, &center_nat);
}
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_get_preferred_height (priv->custom_title,
&center_min, &center_nat);
}
if (priv->titlebar_start_box != NULL)
{
gtk_widget_get_preferred_height (priv->titlebar_start_box,
&child_minimum, &child_natural);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
if (priv->titlebar_end_box != NULL)
{
gtk_widget_get_preferred_height (priv->titlebar_end_box,
&child_minimum, &child_natural);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
*minimum_size = computed_minimum;
*natural_size = computed_natural;
}
static void
gtk_header_bar_get_content_size (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer unused)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
if (for_size < 0)
gtk_header_bar_get_size (widget, orientation, minimum, natural);
else if (orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_header_bar_compute_size_for_orientation (widget, for_size, minimum, natural);
else
gtk_header_bar_compute_size_for_opposing_orientation (widget, for_size, minimum, natural);
}
static void
gtk_header_bar_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
gtk_css_gadget_get_preferred_size (priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
minimum, natural,
NULL, NULL);
}
static void
gtk_header_bar_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
gtk_css_gadget_get_preferred_size (priv->gadget,
GTK_ORIENTATION_VERTICAL,
-1,
minimum, natural,
NULL, NULL);
}
static void
gtk_header_bar_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum,
gint *natural)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
gtk_css_gadget_get_preferred_size (priv->gadget,
GTK_ORIENTATION_HORIZONTAL,
height,
minimum, natural,
NULL, NULL);
}
static void
gtk_header_bar_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum,
gint *natural)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
gtk_css_gadget_get_preferred_size (priv->gadget,
GTK_ORIENTATION_VERTICAL,
width,
minimum, natural,
NULL, NULL);
}
static void
gtk_header_bar_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
GtkAllocation clip;
gtk_widget_set_allocation (widget, allocation);
gtk_css_gadget_allocate (priv->gadget, allocation, gtk_widget_get_allocated_baseline (widget), &clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_header_bar_allocate_contents (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer unused)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GtkRequestedSize *sizes;
gint width, height;
gint nvis_children;
gint title_minimum_size;
gint title_natural_size;
gint start_width, end_width;
gint side[2];
GList *l;
gint i;
Child *child;
GtkPackType packing;
GtkAllocation child_allocation;
gint x;
gint child_size;
GtkTextDirection direction;
gtk_widget_set_allocation (widget, allocation);
direction = gtk_widget_get_direction (widget);
nvis_children = count_visible_children (bar);
sizes = g_newa (GtkRequestedSize, nvis_children);
width = allocation->width - nvis_children * priv->spacing;
height = allocation->height;
i = 0;
for (l = priv->children; l; l = l->next)
{
child = l->data;
if (!gtk_widget_get_visible (child->widget))
continue;
gtk_widget_get_preferred_width_for_height (child->widget,
height,
&sizes[i].minimum_size,
&sizes[i].natural_size);
width -= sizes[i].minimum_size;
i++;
}
title_minimum_size = 0;
title_natural_size = 0;
if (priv->custom_title &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_get_preferred_width_for_height (priv->custom_title,
height,
&title_minimum_size,
&title_natural_size);
}
if (priv->label_box != NULL)
{
gtk_widget_get_preferred_width_for_height (priv->label_box,
height,
&title_minimum_size,
&title_natural_size);
}
width -= title_natural_size;
start_width = 0;
if (priv->titlebar_start_box != NULL)
{
gint min, nat;
gtk_widget_get_preferred_width_for_height (priv->titlebar_start_box,
height,
&min, &nat);
start_width = nat + priv->spacing;
}
width -= start_width;
end_width = 0;
if (priv->titlebar_end_box != NULL)
{
gint min, nat;
gtk_widget_get_preferred_width_for_height (priv->titlebar_end_box,
height,
&min, &nat);
end_width = nat + priv->spacing;
}
width -= end_width;
width = gtk_distribute_natural_allocation (MAX (0, width), nvis_children, sizes);
side[0] = side[1] = 0;
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; packing++)
{
child_allocation.y = allocation->y;
child_allocation.height = height;
if (packing == GTK_PACK_START)
x = allocation->x + start_width;
else
x = allocation->x + allocation->width - end_width;
i = 0;
for (l = priv->children; l != NULL; l = l->next)
{
child = l->data;
if (!gtk_widget_get_visible (child->widget))
continue;
if (child->pack_type != packing)
goto next;
child_size = sizes[i].minimum_size;
child_allocation.width = child_size;
if (packing == GTK_PACK_START)
{
child_allocation.x = x;
x += child_size;
x += priv->spacing;
}
else
{
x -= child_size;
child_allocation.x = x;
x -= priv->spacing;
}
side[packing] += child_size + priv->spacing;
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
gtk_widget_size_allocate (child->widget, &child_allocation);
next:
i++;
}
}
side[GTK_PACK_START] += start_width;
side[GTK_PACK_END] += end_width;
/* We don't enforce css borders on the center widget, to make
* title/subtitle combinations fit without growing the header
*/
child_allocation.y = allocation->y;
child_allocation.height = allocation->height;
width = MAX (side[0], side[1]);
if (allocation->width - 2 * width >= title_natural_size)
child_size = MIN (title_natural_size, allocation->width - 2 * width);
else if (allocation->width - side[0] - side[1] >= title_natural_size)
child_size = MIN (title_natural_size, allocation->width - side[0] - side[1]);
else
child_size = allocation->width - side[0] - side[1];
child_allocation.x = allocation->x + (allocation->width - child_size) / 2;
child_allocation.width = child_size;
if (allocation->x + side[0] > child_allocation.x)
child_allocation.x = allocation->x + side[0];
else if (allocation->x + allocation->width - side[1] < child_allocation.x + child_allocation.width)
child_allocation.x = allocation->x + allocation->width - side[1] - child_allocation.width;
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
gtk_widget_size_allocate (priv->custom_title, &child_allocation);
if (priv->label_box != NULL)
gtk_widget_size_allocate (priv->label_box, &child_allocation);
child_allocation.y = allocation->y;
child_allocation.height = height;
if (priv->titlebar_start_box)
{
gboolean left = (direction == GTK_TEXT_DIR_LTR);
if (left)
child_allocation.x = allocation->x;
else
child_allocation.x = allocation->x + allocation->width - start_width + priv->spacing;
child_allocation.width = start_width - priv->spacing;
gtk_widget_size_allocate (priv->titlebar_start_box, &child_allocation);
}
if (priv->titlebar_end_box)
{
gboolean left = (direction != GTK_TEXT_DIR_LTR);
if (left)
child_allocation.x = allocation->x;
else
child_allocation.x = allocation->x + allocation->width - end_width + priv->spacing;
child_allocation.width = end_width - priv->spacing;
gtk_widget_size_allocate (priv->titlebar_end_box, &child_allocation);
}
gtk_container_get_children_clip (GTK_CONTAINER (widget), out_clip);
}
/**
* 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.
*
* Since: 3.10
*/
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.
*
* Since: 3.10
*/
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.
*
* Since: 3.10
*/
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.
*
* Since: 3.10
*/
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.
*
* Since: 3.10
*/
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)
{
priv->custom_title = title_widget;
gtk_header_bar_reorder_css_node (bar, GTK_PACK_START, priv->custom_title);
gtk_widget_set_parent (priv->custom_title, GTK_WIDGET (bar));
gtk_widget_set_valign (priv->custom_title, GTK_ALIGN_CENTER);
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);
}
gtk_widget_queue_resize (GTK_WIDGET (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.
*
* Since: 3.10
*/
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_destroy (GtkWidget *widget)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
if (priv->custom_title)
{
gtk_widget_unparent (priv->custom_title);
priv->custom_title = NULL;
}
if (priv->label_box)
{
gtk_widget_unparent (priv->label_box);
priv->label_box = NULL;
}
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;
}
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->destroy (widget);
}
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_clear_object (&priv->gadget);
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_SPACING:
g_value_set_int (value, priv->spacing);
break;
case PROP_SHOW_CLOSE_BUTTON:
g_value_set_boolean (value, gtk_header_bar_get_show_close_button (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_SPACING:
if (priv->spacing != g_value_get_int (value))
{
priv->spacing = g_value_get_int (value);
gtk_widget_queue_resize (GTK_WIDGET (bar));
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_SHOW_CLOSE_BUTTON:
gtk_header_bar_set_show_close_button (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);
Child *child;
g_return_if_fail (gtk_widget_get_parent (widget) == NULL);
child = g_new (Child, 1);
child->widget = widget;
child->pack_type = pack_type;
priv->children = g_list_append (priv->children, child);
gtk_widget_freeze_child_notify (widget);
gtk_header_bar_reorder_css_node (bar, GTK_PACK_START, widget);
gtk_widget_set_parent (widget, GTK_WIDGET (bar));
g_signal_connect (widget, "notify::visible", G_CALLBACK (notify_child_cb), bar);
gtk_widget_child_notify (widget, "pack-type");
gtk_widget_child_notify (widget, "position");
gtk_widget_thaw_child_notify (widget);
_gtk_header_bar_update_separator_visibility (bar);
}
static void
gtk_header_bar_add (GtkContainer *container,
GtkWidget *child)
{
gtk_header_bar_pack (GTK_HEADER_BAR (container), child, GTK_PACK_START);
}
static GList *
find_child_link (GtkHeaderBar *bar,
GtkWidget *widget,
gint *position)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GList *l;
Child *child;
gint i;
for (l = priv->children, i = 0; l; l = l->next, i++)
{
child = l->data;
if (child->widget == widget)
{
if (position)
*position = i;
return l;
}
}
return NULL;
}
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);
GList *l;
Child *child;
l = find_child_link (bar, widget, NULL);
if (l)
{
child = l->data;
g_signal_handlers_disconnect_by_func (widget, notify_child_cb, bar);
gtk_widget_unparent (child->widget);
priv->children = g_list_delete_link (priv->children, l);
g_free (child);
gtk_widget_queue_resize (GTK_WIDGET (container));
_gtk_header_bar_update_separator_visibility (bar);
}
}
static void
gtk_header_bar_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
Child *child;
GList *children;
if (include_internals && priv->titlebar_start_box != NULL)
(* callback) (priv->titlebar_start_box, callback_data);
children = priv->children;
while (children)
{
child = children->data;
children = children->next;
if (child->pack_type == GTK_PACK_START)
(* callback) (child->widget, callback_data);
}
if (priv->custom_title != NULL)
(* callback) (priv->custom_title, callback_data);
if (include_internals && priv->label_box != NULL)
(* callback) (priv->label_box, callback_data);
children = priv->children;
while (children)
{
child = children->data;
children = children->next;
if (child->pack_type == GTK_PACK_END)
(* callback) (child->widget, callback_data);
}
if (include_internals && priv->titlebar_end_box != NULL)
(* callback) (priv->titlebar_end_box, callback_data);
}
static void
gtk_header_bar_reorder_child (GtkHeaderBar *bar,
GtkWidget *widget,
gint position)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GList *l;
gint old_position;
Child *child;
l = find_child_link (bar, widget, &old_position);
if (l == NULL)
return;
if (old_position == position)
return;
child = l->data;
priv->children = g_list_delete_link (priv->children, l);
if (position < 0)
l = NULL;
else
l = g_list_nth (priv->children, position);
priv->children = g_list_insert_before (priv->children, l, child);
gtk_header_bar_reorder_css_node (bar, child->pack_type, widget);
gtk_widget_child_notify (widget, "position");
gtk_widget_queue_resize (widget);
}
static GType
gtk_header_bar_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static void
gtk_header_bar_get_child_property (GtkContainer *container,
GtkWidget *widget,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
GList *l;
Child *child;
l = find_child_link (bar, widget, NULL);
if (l == NULL)
{
g_param_value_set_default (pspec, value);
return;
}
child = l->data;
switch (property_id)
{
case CHILD_PROP_PACK_TYPE:
g_value_set_enum (value, child->pack_type);
break;
case CHILD_PROP_POSITION:
g_value_set_int (value, g_list_position (priv->children, l));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void
gtk_header_bar_set_child_property (GtkContainer *container,
GtkWidget *widget,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GList *l;
Child *child;
l = find_child_link (bar, widget, NULL);
if (l == NULL)
return;
child = l->data;
switch (property_id)
{
case CHILD_PROP_PACK_TYPE:
child->pack_type = g_value_get_enum (value);
_gtk_header_bar_update_separator_visibility (bar);
gtk_widget_queue_resize (widget);
break;
case CHILD_PROP_POSITION:
gtk_header_bar_reorder_child (bar, widget, g_value_get_int (value));
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static gint
gtk_header_bar_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
gtk_css_gadget_draw (priv->gadget, cr);
return FALSE;
}
static gboolean
gtk_header_bar_render_contents (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer unused)
{
GtkWidget *widget = gtk_css_gadget_get_owner (gadget);
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->draw (widget, cr);
return FALSE;
}
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);
_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);
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->unrealize (widget);
}
static gboolean
window_state_changed (GtkWidget *window,
GdkEventWindowState *event,
gpointer data)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (data);
if (event->changed_mask & (GDK_WINDOW_STATE_FULLSCREEN | GDK_WINDOW_STATE_MAXIMIZED | GDK_WINDOW_STATE_TILED))
_gtk_header_bar_update_window_buttons (bar);
return FALSE;
}
static void
gtk_header_bar_hierarchy_changed (GtkWidget *widget,
GtkWidget *previous_toplevel)
{
GtkWidget *toplevel;
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
toplevel = gtk_widget_get_toplevel (widget);
if (previous_toplevel)
g_signal_handlers_disconnect_by_func (previous_toplevel,
window_state_changed, widget);
if (toplevel)
g_signal_connect_after (toplevel, "window-state-event",
G_CALLBACK (window_state_changed), widget);
_gtk_header_bar_update_window_buttons (bar);
}
static void
gtk_header_bar_direction_changed (GtkWidget *widget,
GtkTextDirection previous_direction)
{
GTK_WIDGET_CLASS (gtk_header_bar_parent_class)->direction_changed (widget, previous_direction);
gtk_css_node_reverse_children (gtk_widget_get_css_node (widget));
}
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->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->destroy = gtk_header_bar_destroy;
widget_class->size_allocate = gtk_header_bar_size_allocate;
widget_class->get_preferred_width = gtk_header_bar_get_preferred_width;
widget_class->get_preferred_height = gtk_header_bar_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_header_bar_get_preferred_height_for_width;
widget_class->get_preferred_width_for_height = gtk_header_bar_get_preferred_width_for_height;
widget_class->draw = gtk_header_bar_draw;
widget_class->realize = gtk_header_bar_realize;
widget_class->unrealize = gtk_header_bar_unrealize;
widget_class->hierarchy_changed = gtk_header_bar_hierarchy_changed;
widget_class->direction_changed = gtk_header_bar_direction_changed;
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;
container_class->set_child_property = gtk_header_bar_set_child_property;
container_class->get_child_property = gtk_header_bar_get_child_property;
gtk_container_class_handle_border_width (container_class);
gtk_container_class_install_child_property (container_class,
CHILD_PROP_PACK_TYPE,
g_param_spec_enum ("pack-type",
P_("Pack type"),
P_("A GtkPackType indicating whether the child is packed with reference to the start or end of the parent"),
GTK_TYPE_PACK_TYPE, GTK_PACK_START,
GTK_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_POSITION,
g_param_spec_int ("position",
P_("Position"),
P_("The index of the child in the parent"),
-1, G_MAXINT, 0,
GTK_PARAM_READWRITE));
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);
header_bar_props[PROP_SPACING] =
g_param_spec_int ("spacing",
P_("Spacing"),
P_("The amount of space between children"),
0, G_MAXINT,
DEFAULT_SPACING,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkHeaderBar:show-close-button:
*
* Whether to show window decorations.
*
* 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_CLOSE_BUTTON] =
g_param_spec_boolean ("show-close-button",
P_("Show decorations"),
P_("Whether to show window decorations"),
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.
*
* Since: 3.12
*/
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.
*
* Since: 3.12
*/
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.
*
* Since: 3.12
*/
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_css_name (widget_class, "headerbar");
}
static void
gtk_header_bar_init (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv;
GtkCssNode *widget_node;
priv = gtk_header_bar_get_instance_private (bar);
gtk_widget_set_has_window (GTK_WIDGET (bar), FALSE);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (bar), FALSE);
priv->title = NULL;
priv->subtitle = NULL;
priv->custom_title = NULL;
priv->children = NULL;
priv->spacing = DEFAULT_SPACING;
priv->has_subtitle = TRUE;
priv->decoration_layout = NULL;
priv->decoration_layout_set = FALSE;
init_sizing_box (bar);
construct_label_box (bar);
widget_node = gtk_widget_get_css_node (GTK_WIDGET (bar));
priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
GTK_WIDGET (bar),
gtk_header_bar_get_content_size,
gtk_header_bar_allocate_contents,
gtk_header_bar_render_contents,
NULL,
NULL);
}
static void
gtk_header_bar_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const gchar *type)
{
if (type && strcmp (type, "title") == 0)
gtk_header_bar_set_custom_title (GTK_HEADER_BAR (buildable), GTK_WIDGET (child));
else if (!type)
gtk_container_add (GTK_CONTAINER (buildable), GTK_WIDGET (child));
else
GTK_BUILDER_WARN_INVALID_CHILD_TYPE (GTK_HEADER_BAR (buildable), type);
}
static void
gtk_header_bar_buildable_init (GtkBuildableIface *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.
*
* Since: 3.10
*/
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.
*
* Since: 3.10
*/
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
*
* Since: 3.10
*/
GtkWidget *
gtk_header_bar_new (void)
{
return GTK_WIDGET (g_object_new (GTK_TYPE_HEADER_BAR, NULL));
}
/**
* gtk_header_bar_get_show_close_button:
* @bar: a #GtkHeaderBar
*
* Returns whether this header bar shows the standard window
* decorations.
*
* Returns: %TRUE if the decorations are shown
*
* Since: 3.10
*/
gboolean
gtk_header_bar_get_show_close_button (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->shows_wm_decorations;
}
/**
* gtk_header_bar_set_show_close_button:
* @bar: a #GtkHeaderBar
* @setting: %TRUE to show standard widow decorations
*
* Sets whether this header bar shows the standard window decorations,
* including close, maximize, and minimize.
*
* Since: 3.10
*/
void
gtk_header_bar_set_show_close_button (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->shows_wm_decorations == setting)
return;
priv->shows_wm_decorations = setting;
_gtk_header_bar_update_window_buttons (bar);
g_object_notify_by_pspec (G_OBJECT (bar), header_bar_props[PROP_SHOW_CLOSE_BUTTON]);
}
/**
* 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.
*
* Since: 3.12
*/
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
*
* Since: 3.12
*/
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.
*
* Since: 3.12
*/
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);
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
*
* Since: 3.12
*/
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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