/* * 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 /** * 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_box_pack_start (GTK_BOX (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_box_pack_start (GTK_BOX (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_box_pack_start (GTK_BOX (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_box_pack_start (GTK_BOX (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; 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_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; 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_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_box_pack_start (GTK_BOX (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_box_pack_start (GTK_BOX (box), separator); 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_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_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; 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, ¢er_min, ¢er_nat); else add_child_size (priv->label_sizing_box, orientation, ¢er_min, ¢er_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, ¢er_min, ¢er_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, ¢er_min, ¢er_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, ¢er_min, ¢er_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, const GtkAllocation *allocation, 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 = 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; 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 = allocation->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 = 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; /* 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 = allocation->x + allocation->width - (child_allocation.x - 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 = allocation->y; child_allocation.height = allocation->height; child_size = MIN (allocation->width - side[0] - side[1], title_natural_size); child_allocation.x = allocation->x + (allocation->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 (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 (title_widget != NULL) { gtk_widget_size_allocate (title_widget, &child_allocation, baseline); } 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, baseline); } 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, 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_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->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; 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_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 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. */ 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; }