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gtk2/gtk/gtkheaderbar.c
Timm Bäder bd71e744d2 Stop using gtk_box_pack_end 
It might soon go away!
2019-01-23 19:30:46 -05:00

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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 "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 "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.
*/
#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 show_title_buttons;
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;
GdkSurfaceState state;
guint shows_app_menu : 1;
};
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_TITLE_BUTTONS,
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.
*/
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_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_container_add (GTK_CONTAINER (priv->label_sizing_box), w);
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);
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_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_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_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);
GdkTexture *texture;
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)))
texture = gtk_window_get_icon_for_size (window, 16 * scale);
else
texture = gtk_window_get_icon_for_size (window, 20 * scale);
if (texture)
{
gtk_image_set_from_paintable (GTK_IMAGE (priv->titlebar_icon),
GDK_PAINTABLE (texture));
g_object_unref (texture);
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;
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_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, 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_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_container_add (GTK_CONTAINER (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 (GTK_BOX (box), separator, 0);
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);
gtk_widget_set_parent (box, GTK_WIDGET (bar));
if (i == 0)
{
priv->titlebar_start_box = box;
priv->titlebar_start_separator = separator;
}
else
{
priv->titlebar_end_box = box;
priv->titlebar_end_separator = separator;
}
}
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;
}
/* 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_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;
gtk_widget_measure (child, orientation, -1, &child_minimum, &child_natural,
NULL, NULL);
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_measure (child->widget, GTK_ORIENTATION_HORIZONTAL, avail_size,
&child_size, &child_natural, NULL, NULL);
required_size += child_size;
required_natural += child_natural;
nvis_children += 1;
}
}
if (priv->label_box != NULL)
{
gtk_widget_measure (priv->label_sizing_box, GTK_ORIENTATION_HORIZONTAL, -1,
&child_size, &child_natural, NULL, NULL);
required_size += child_size;
required_natural += child_natural;
}
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_measure (priv->custom_title, GTK_ORIENTATION_HORIZONTAL, -1,
&child_size, &child_natural, NULL, NULL);
required_size += child_size;
required_natural += child_natural;
}
if (priv->titlebar_start_box != NULL)
{
gtk_widget_measure (priv->titlebar_start_box, GTK_ORIENTATION_HORIZONTAL, -1,
&child_size, &child_natural, NULL, NULL);
required_size += child_size;
required_natural += child_natural;
nvis_children += 1;
}
if (priv->titlebar_end_box != NULL)
{
gtk_widget_measure (priv->titlebar_end_box, GTK_ORIENTATION_HORIZONTAL, -1,
&child_size, &child_natural, NULL, NULL);
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_measure (child->widget, GTK_ORIENTATION_HORIZONTAL, -1,
&sizes[i].minimum_size, &sizes[i].natural_size,
NULL, NULL);
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_measure (child->widget, GTK_ORIENTATION_VERTICAL, child_size,
&child_minimum, &child_natural, NULL, NULL);
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_measure (priv->label_sizing_box, GTK_ORIENTATION_VERTICAL, -1,
&center_min, &center_nat, NULL, NULL);
}
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
{
gtk_widget_measure (priv->custom_title, GTK_ORIENTATION_VERTICAL, -1,
&center_min, &center_nat, NULL, NULL);
}
if (priv->titlebar_start_box != NULL)
{
gtk_widget_measure (priv->titlebar_start_box, GTK_ORIENTATION_VERTICAL, -1,
&child_minimum, &child_natural, NULL, NULL);
computed_minimum = MAX (computed_minimum, child_minimum);
computed_natural = MAX (computed_natural, child_natural);
}
if (priv->titlebar_end_box != NULL)
{
gtk_widget_measure (priv->titlebar_end_box, GTK_ORIENTATION_VERTICAL, -1,
&child_minimum, &child_natural, NULL, NULL);
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_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
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_size_allocate (GtkWidget *widget,
int widget_width,
int widget_height,
int baseline)
{
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (GTK_HEADER_BAR (widget));
GtkWidget *title_widget;
GtkHeaderBar *bar = GTK_HEADER_BAR (widget);
GtkRequestedSize *sizes;
gint width, height;
gint nvis_children;
gint title_minimum_size;
gint title_natural_size;
gboolean title_expands = FALSE;
gint start_width, end_width;
gint uniform_expand_bonus[2] = { 0 };
gint leftover_expand_bonus[2] = { 0 };
gint nexpand_children[2] = { 0 };
gint side[2];
GList *l;
gint i;
Child *child;
GtkPackType packing;
GtkAllocation child_allocation;
gint x;
gint child_size;
GtkTextDirection direction;
direction = gtk_widget_get_direction (widget);
nvis_children = count_visible_children (bar);
sizes = g_newa (GtkRequestedSize, nvis_children);
width = widget_width - nvis_children * priv->spacing;
height = widget_height;
i = 0;
for (l = priv->children; l; l = l->next)
{
child = l->data;
if (!gtk_widget_get_visible (child->widget))
continue;
if (gtk_widget_compute_expand (child->widget, GTK_ORIENTATION_HORIZONTAL))
nexpand_children[child->pack_type]++;
gtk_widget_measure (child->widget, GTK_ORIENTATION_HORIZONTAL, height,
&sizes[i].minimum_size, &sizes[i].natural_size,
NULL, NULL);
width -= sizes[i].minimum_size;
i++;
}
title_minimum_size = 0;
title_natural_size = 0;
if (priv->custom_title != NULL &&
gtk_widget_get_visible (priv->custom_title))
title_widget = priv->custom_title;
else if (priv->label_box != NULL)
title_widget = priv->label_box;
else
title_widget = NULL;
if (title_widget)
{
gtk_widget_measure (title_widget, GTK_ORIENTATION_HORIZONTAL, height,
&title_minimum_size, &title_natural_size,
NULL, NULL);
width -= title_natural_size;
title_expands = gtk_widget_compute_expand (title_widget, GTK_ORIENTATION_HORIZONTAL);
}
start_width = 0;
if (priv->titlebar_start_box != NULL)
{
gint min, nat;
gtk_widget_measure (priv->titlebar_start_box, GTK_ORIENTATION_HORIZONTAL, height,
&min, &nat,
NULL, NULL);
start_width = nat + priv->spacing;
}
width -= start_width;
end_width = 0;
if (priv->titlebar_end_box != NULL)
{
gint min, nat;
gtk_widget_measure (priv->titlebar_end_box, GTK_ORIENTATION_HORIZONTAL, height,
&min, &nat,
NULL, NULL);
end_width = nat + priv->spacing;
}
width -= end_width;
width = gtk_distribute_natural_allocation (MAX (0, width), nvis_children, sizes);
/* compute the nominal size of the children filling up each side of
* the title in titlebar
*/
side[0] = start_width;
side[1] = end_width;
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; packing++)
{
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)
side[packing] += sizes[i].minimum_size + priv->spacing;
i++;
}
}
/* figure out how much space is left on each side of the title,
* and earkmark that space for the expanded children.
*
* If the title itself is expanded, then it gets half the spoils
* from each side.
*/
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; packing++)
{
gint side_free_space;
side_free_space = widget_width / 2 - title_natural_size / 2 - side[packing];
if (side_free_space > 0 && nexpand_children[packing] > 0)
{
width -= side_free_space;
if (title_expands)
side_free_space -= side_free_space / 2;
side[packing] += side_free_space;
uniform_expand_bonus[packing] = side_free_space / nexpand_children[packing];
leftover_expand_bonus[packing] = side_free_space % nexpand_children[packing];
}
}
/* allocate the children on both sides of the title */
for (packing = GTK_PACK_START; packing <= GTK_PACK_END; packing++)
{
child_allocation.y = 0;
child_allocation.height = height;
if (packing == GTK_PACK_START)
x = start_width;
else
x = widget_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;
/* if this child is expanded, give it extra space from the reserves */
if (gtk_widget_compute_expand (child->widget, GTK_ORIENTATION_HORIZONTAL))
{
gint expand_bonus;
expand_bonus = uniform_expand_bonus[packing];
if (leftover_expand_bonus[packing] > 0)
{
expand_bonus++;
leftover_expand_bonus[packing]--;
}
child_size += expand_bonus;
}
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;
}
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x = widget_width - child_allocation.x - child_allocation.width;
gtk_widget_size_allocate (child->widget, &child_allocation, baseline);
next:
i++;
}
}
/* We don't enforce css borders on the center widget, to make
* title/subtitle combinations fit without growing the header
*/
child_allocation.y = 0;
child_allocation.height = widget_height;
child_size = MIN (widget_width - side[0] - side[1], title_natural_size);
child_allocation.x = (widget_width - child_size) / 2;
child_allocation.width = child_size;
/* if the title widget is expanded, then grow it by all the available
* free space, and recenter it
*/
if (title_expands && width > 0)
{
child_allocation.width += width;
child_allocation.x -= width / 2;
}
if (side[0] > child_allocation.x)
child_allocation.x = side[0];
else if (widget_width - side[1] < child_allocation.x + child_allocation.width)
child_allocation.x = widget_width - side[1] - child_allocation.width;
if (direction == GTK_TEXT_DIR_RTL)
child_allocation.x = widget_width - (child_allocation.x) - child_allocation.width;
if (title_widget != NULL)
{
gtk_widget_size_allocate (title_widget, &child_allocation, baseline);
}
child_allocation.y = 0;
child_allocation.height = height;
if (priv->titlebar_start_box)
{
gboolean left = (direction == GTK_TEXT_DIR_LTR);
if (left)
child_allocation.x = 0;
else
child_allocation.x = widget_width - start_width + priv->spacing;
child_allocation.width = start_width - priv->spacing;
gtk_widget_size_allocate (priv->titlebar_start_box, &child_allocation, baseline);
}
if (priv->titlebar_end_box)
{
gboolean left = (direction != GTK_TEXT_DIR_LTR);
if (left)
child_allocation.x = 0;
else
child_allocation.x = widget_width - end_width + priv->spacing;
child_allocation.width = end_width - priv->spacing;
gtk_widget_size_allocate (priv->titlebar_end_box, &child_allocation, baseline);
}
}
/**
* 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)
{
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.
*/
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->label_sizing_box)
{
gtk_widget_destroy (priv->label_sizing_box);
g_clear_object (&priv->label_sizing_box);
}
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_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_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_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_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);
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,
GtkCallback callback,
gpointer callback_data)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (container);
GtkHeaderBarPrivate *priv = gtk_header_bar_get_instance_private (bar);
Child *child;
GList *children;
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);
children = priv->children;
while (children)
{
child = children->data;
children = children->next;
if (child->pack_type == GTK_PACK_END)
(* callback) (child->widget, 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 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_widget_get_surface (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_widget_get_surface (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_widget_get_surface (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_hierarchy_changed (GtkWidget *widget,
GtkWidget *previous_toplevel)
{
GtkHeaderBar *bar = GTK_HEADER_BAR (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->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->measure = gtk_header_bar_measure;
widget_class->realize = gtk_header_bar_realize;
widget_class->unrealize = gtk_header_bar_unrealize;
widget_class->hierarchy_changed = gtk_header_bar_hierarchy_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_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-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_css_name (widget_class, I_("headerbar"));
}
static void
gtk_header_bar_init (GtkHeaderBar *bar)
{
GtkHeaderBarPrivate *priv;
priv = gtk_header_bar_get_instance_private (bar);
gtk_widget_set_has_surface (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;
priv->shows_app_menu = FALSE;
priv->state = GDK_SURFACE_STATE_WITHDRAWN;
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 (type && strcmp (type, "title") == 0)
gtk_header_bar_set_custom_title (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);
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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