/* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */ /* gtkpathbar.c * Copyright (C) 2004 Red Hat, Inc., Jonathan Blandford * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "config.h" #include "gtkpathbar.h" #include #include "gtktogglebutton.h" #include "gtkalignment.h" #include "gtkarrow.h" #include "gtkdnd.h" #include "gtkimage.h" #include "gtkintl.h" #include "gtkicontheme.h" #include "gtkiconfactory.h" #include "gtklabel.h" #include "gtkhbox.h" #include "gtkmain.h" #include "gtkmarshalers.h" enum { PATH_CLICKED, LAST_SIGNAL }; typedef enum { NORMAL_BUTTON, ROOT_BUTTON, HOME_BUTTON, DESKTOP_BUTTON } ButtonType; #define BUTTON_DATA(x) ((ButtonData *)(x)) #define SCROLL_DELAY_FACTOR 5 static guint path_bar_signals [LAST_SIGNAL] = { 0 }; /* Icon size for if we can't get it from the theme */ #define FALLBACK_ICON_SIZE 16 typedef struct _ButtonData ButtonData; struct _ButtonData { GtkWidget *button; ButtonType type; char *dir_name; GFile *file; GtkWidget *image; GtkWidget *label; GCancellable *cancellable; guint ignore_changes : 1; guint file_is_hidden : 1; }; /* This macro is used to check if a button can be used as a fake root. * All buttons in front of a fake root are automatically hidden when in a * directory below a fake root and replaced with the "<" arrow button. */ #define BUTTON_IS_FAKE_ROOT(button) ((button)->type == HOME_BUTTON) G_DEFINE_TYPE (GtkPathBar, gtk_path_bar, GTK_TYPE_CONTAINER) static void gtk_path_bar_finalize (GObject *object); static void gtk_path_bar_dispose (GObject *object); static void gtk_path_bar_realize (GtkWidget *widget); static void gtk_path_bar_unrealize (GtkWidget *widget); static void gtk_path_bar_get_preferred_width (GtkWidget *widget, gint *minimum, gint *natural); static void gtk_path_bar_get_preferred_height (GtkWidget *widget, gint *minimum, gint *natural); static void gtk_path_bar_map (GtkWidget *widget); static void gtk_path_bar_unmap (GtkWidget *widget); static void gtk_path_bar_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_path_bar_add (GtkContainer *container, GtkWidget *widget); static void gtk_path_bar_remove (GtkContainer *container, GtkWidget *widget); static void gtk_path_bar_forall (GtkContainer *container, gboolean include_internals, GtkCallback callback, gpointer callback_data); static gboolean gtk_path_bar_scroll (GtkWidget *widget, GdkEventScroll *event); static void gtk_path_bar_scroll_up (GtkPathBar *path_bar); static void gtk_path_bar_scroll_down (GtkPathBar *path_bar); static void gtk_path_bar_stop_scrolling (GtkPathBar *path_bar); static gboolean gtk_path_bar_slider_up_defocus (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar); static gboolean gtk_path_bar_slider_down_defocus (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar); static gboolean gtk_path_bar_slider_button_press (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar); static gboolean gtk_path_bar_slider_button_release(GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar); static void gtk_path_bar_grab_notify (GtkWidget *widget, gboolean was_grabbed); static void gtk_path_bar_state_changed (GtkWidget *widget, GtkStateType previous_state); static void gtk_path_bar_style_updated (GtkWidget *widget); static void gtk_path_bar_screen_changed (GtkWidget *widget, GdkScreen *previous_screen); static void gtk_path_bar_check_icon_theme (GtkPathBar *path_bar); static void gtk_path_bar_update_button_appearance (GtkPathBar *path_bar, ButtonData *button_data, gboolean current_dir); static void on_slider_unmap (GtkWidget *widget, GtkPathBar *path_bar) { if (path_bar->timer && ((widget == path_bar->up_slider_button && path_bar->scrolling_up) || (widget == path_bar->down_slider_button && path_bar->scrolling_down))) gtk_path_bar_stop_scrolling (path_bar); } static GtkWidget * get_slider_button (GtkPathBar *path_bar, GtkArrowType arrow_type) { GtkWidget *button; AtkObject *atk_obj; gtk_widget_push_composite_child (); button = gtk_button_new (); atk_obj = gtk_widget_get_accessible (button); if (arrow_type == GTK_ARROW_LEFT) atk_object_set_name (atk_obj, _("Up Path")); else atk_object_set_name (atk_obj, _("Down Path")); gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE); gtk_container_add (GTK_CONTAINER (button), gtk_arrow_new (arrow_type, GTK_SHADOW_OUT)); gtk_container_add (GTK_CONTAINER (path_bar), button); gtk_widget_show_all (button); g_signal_connect (G_OBJECT (button), "unmap", G_CALLBACK (on_slider_unmap), path_bar); gtk_widget_pop_composite_child (); return button; } static void gtk_path_bar_init (GtkPathBar *path_bar) { gtk_widget_set_has_window (GTK_WIDGET (path_bar), FALSE); gtk_widget_set_redraw_on_allocate (GTK_WIDGET (path_bar), FALSE); path_bar->get_info_cancellable = NULL; path_bar->spacing = 0; path_bar->up_slider_button = get_slider_button (path_bar, GTK_ARROW_LEFT); path_bar->down_slider_button = get_slider_button (path_bar, GTK_ARROW_RIGHT); path_bar->icon_size = FALLBACK_ICON_SIZE; g_signal_connect_swapped (path_bar->up_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_up), path_bar); g_signal_connect_swapped (path_bar->down_slider_button, "clicked", G_CALLBACK (gtk_path_bar_scroll_down), path_bar); g_signal_connect (path_bar->up_slider_button, "focus-out-event", G_CALLBACK (gtk_path_bar_slider_up_defocus), path_bar); g_signal_connect (path_bar->down_slider_button, "focus-out-event", G_CALLBACK (gtk_path_bar_slider_down_defocus), path_bar); g_signal_connect (path_bar->up_slider_button, "button-press-event", G_CALLBACK (gtk_path_bar_slider_button_press), path_bar); g_signal_connect (path_bar->up_slider_button, "button-release-event", G_CALLBACK (gtk_path_bar_slider_button_release), path_bar); g_signal_connect (path_bar->down_slider_button, "button-press-event", G_CALLBACK (gtk_path_bar_slider_button_press), path_bar); g_signal_connect (path_bar->down_slider_button, "button-release-event", G_CALLBACK (gtk_path_bar_slider_button_release), path_bar); } static void gtk_path_bar_class_init (GtkPathBarClass *path_bar_class) { GObjectClass *gobject_class; GtkWidgetClass *widget_class; GtkContainerClass *container_class; gobject_class = (GObjectClass *) path_bar_class; widget_class = (GtkWidgetClass *) path_bar_class; container_class = (GtkContainerClass *) path_bar_class; gobject_class->finalize = gtk_path_bar_finalize; gobject_class->dispose = gtk_path_bar_dispose; widget_class->get_preferred_width = gtk_path_bar_get_preferred_width; widget_class->get_preferred_height = gtk_path_bar_get_preferred_height; widget_class->realize = gtk_path_bar_realize; widget_class->unrealize = gtk_path_bar_unrealize; widget_class->map = gtk_path_bar_map; widget_class->unmap = gtk_path_bar_unmap; widget_class->size_allocate = gtk_path_bar_size_allocate; widget_class->style_updated = gtk_path_bar_style_updated; widget_class->screen_changed = gtk_path_bar_screen_changed; widget_class->grab_notify = gtk_path_bar_grab_notify; widget_class->state_changed = gtk_path_bar_state_changed; widget_class->scroll_event = gtk_path_bar_scroll; container_class->add = gtk_path_bar_add; container_class->forall = gtk_path_bar_forall; container_class->remove = gtk_path_bar_remove; gtk_container_class_handle_border_width (container_class); /* FIXME: */ /* container_class->child_type = gtk_path_bar_child_type;*/ path_bar_signals [PATH_CLICKED] = g_signal_new (I_("path-clicked"), G_OBJECT_CLASS_TYPE (gobject_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GtkPathBarClass, path_clicked), NULL, NULL, _gtk_marshal_VOID__POINTER_POINTER_BOOLEAN, G_TYPE_NONE, 3, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_BOOLEAN); } static void gtk_path_bar_finalize (GObject *object) { GtkPathBar *path_bar; path_bar = GTK_PATH_BAR (object); gtk_path_bar_stop_scrolling (path_bar); g_list_free (path_bar->button_list); if (path_bar->root_file) g_object_unref (path_bar->root_file); if (path_bar->home_file) g_object_unref (path_bar->home_file); if (path_bar->desktop_file) g_object_unref (path_bar->desktop_file); if (path_bar->root_icon) g_object_unref (path_bar->root_icon); if (path_bar->home_icon) g_object_unref (path_bar->home_icon); if (path_bar->desktop_icon) g_object_unref (path_bar->desktop_icon); if (path_bar->file_system) g_object_unref (path_bar->file_system); G_OBJECT_CLASS (gtk_path_bar_parent_class)->finalize (object); } /* Removes the settings signal handler. It's safe to call multiple times */ static void remove_settings_signal (GtkPathBar *path_bar, GdkScreen *screen) { if (path_bar->settings_signal_id) { GtkSettings *settings; settings = gtk_settings_get_for_screen (screen); g_signal_handler_disconnect (settings, path_bar->settings_signal_id); path_bar->settings_signal_id = 0; } } static void gtk_path_bar_dispose (GObject *object) { GtkPathBar *path_bar = GTK_PATH_BAR (object); remove_settings_signal (path_bar, gtk_widget_get_screen (GTK_WIDGET (object))); if (path_bar->get_info_cancellable) g_cancellable_cancel (path_bar->get_info_cancellable); path_bar->get_info_cancellable = NULL; G_OBJECT_CLASS (gtk_path_bar_parent_class)->dispose (object); } /* Size requisition: * * Ideally, our size is determined by another widget, and we are just filling * available space. */ static void gtk_path_bar_get_preferred_width (GtkWidget *widget, gint *minimum, gint *natural) { ButtonData *button_data; GtkPathBar *path_bar; GList *list; gint child_height; gint height; gint child_min, child_nat; path_bar = GTK_PATH_BAR (widget); *minimum = *natural = 0; height = 0; for (list = path_bar->button_list; list; list = list->next) { button_data = BUTTON_DATA (list->data); gtk_widget_get_preferred_width (button_data->button, &child_min, &child_nat); gtk_widget_get_preferred_height (button_data->button, &child_height, NULL); height = MAX (height, child_height); if (button_data->type == NORMAL_BUTTON) { /* Use 2*Height as button width because of ellipsized label. */ child_min = MAX (child_min, child_height * 2); child_nat = MAX (child_min, child_height * 2); } *minimum = MAX (*minimum, child_min); *natural = MAX (*natural, child_nat); } /* Add space for slider, if we have more than one path */ /* Theoretically, the slider could be bigger than the other button. But we're * not going to worry about that now. */ path_bar->slider_width = MIN (height * 2 / 3 + 5, height); if (path_bar->button_list && path_bar->button_list->next != NULL) { *minimum += (path_bar->spacing + path_bar->slider_width) * 2; *natural += (path_bar->spacing + path_bar->slider_width) * 2; } } static void gtk_path_bar_get_preferred_height (GtkWidget *widget, gint *minimum, gint *natural) { ButtonData *button_data; GtkPathBar *path_bar; GList *list; gint child_min, child_nat; path_bar = GTK_PATH_BAR (widget); *minimum = *natural = 0; for (list = path_bar->button_list; list; list = list->next) { button_data = BUTTON_DATA (list->data); gtk_widget_get_preferred_height (button_data->button, &child_min, &child_nat); *minimum = MAX (*minimum, child_min); *natural = MAX (*natural, child_nat); } } static void gtk_path_bar_update_slider_buttons (GtkPathBar *path_bar) { if (path_bar->button_list) { GtkWidget *button; button = BUTTON_DATA (path_bar->button_list->data)->button; if (gtk_widget_get_child_visible (button)) { gtk_path_bar_stop_scrolling (path_bar); gtk_widget_set_sensitive (path_bar->down_slider_button, FALSE); } else gtk_widget_set_sensitive (path_bar->down_slider_button, TRUE); button = BUTTON_DATA (g_list_last (path_bar->button_list)->data)->button; if (gtk_widget_get_child_visible (button)) { gtk_path_bar_stop_scrolling (path_bar); gtk_widget_set_sensitive (path_bar->up_slider_button, FALSE); } else gtk_widget_set_sensitive (path_bar->up_slider_button, TRUE); } } static void gtk_path_bar_map (GtkWidget *widget) { gdk_window_show (GTK_PATH_BAR (widget)->event_window); GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->map (widget); } static void gtk_path_bar_unmap (GtkWidget *widget) { gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget)); gdk_window_hide (GTK_PATH_BAR (widget)->event_window); GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unmap (widget); } static void gtk_path_bar_realize (GtkWidget *widget) { GtkPathBar *path_bar; GtkAllocation allocation; GdkWindow *window; GdkWindowAttr attributes; gint attributes_mask; gtk_widget_set_realized (widget, TRUE); path_bar = GTK_PATH_BAR (widget); window = gtk_widget_get_parent_window (widget); gtk_widget_set_window (widget, window); g_object_ref (window); gtk_widget_get_allocation (widget, &allocation); attributes.window_type = GDK_WINDOW_CHILD; attributes.x = allocation.x; attributes.y = allocation.y; attributes.width = allocation.width; attributes.height = allocation.height; attributes.wclass = GDK_INPUT_ONLY; attributes.event_mask = gtk_widget_get_events (widget); attributes.event_mask |= GDK_SCROLL_MASK; attributes_mask = GDK_WA_X | GDK_WA_Y; path_bar->event_window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask); gdk_window_set_user_data (path_bar->event_window, widget); } static void gtk_path_bar_unrealize (GtkWidget *widget) { GtkPathBar *path_bar; path_bar = GTK_PATH_BAR (widget); gdk_window_set_user_data (path_bar->event_window, NULL); gdk_window_destroy (path_bar->event_window); path_bar->event_window = NULL; GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->unrealize (widget); } /* This is a tad complicated */ static void gtk_path_bar_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkWidget *child; GtkPathBar *path_bar = GTK_PATH_BAR (widget); GtkTextDirection direction; GtkAllocation child_allocation; GList *list, *first_button; gint width; gint allocation_width; gboolean need_sliders = FALSE; gint up_slider_offset = 0; GtkRequisition child_requisition; gtk_widget_set_allocation (widget, allocation); if (gtk_widget_get_realized (widget)) gdk_window_move_resize (path_bar->event_window, allocation->x, allocation->y, allocation->width, allocation->height); /* No path is set; we don't have to allocate anything. */ if (path_bar->button_list == NULL) return; direction = gtk_widget_get_direction (widget); allocation_width = allocation->width; /* First, we check to see if we need the scrollbars. */ if (path_bar->fake_root) width = path_bar->spacing + path_bar->slider_width; else width = 0; for (list = path_bar->button_list; list; list = list->next) { child = BUTTON_DATA (list->data)->button; gtk_widget_get_preferred_size (child, &child_requisition, NULL); width += child_requisition.width + path_bar->spacing; if (list == path_bar->fake_root) break; } if (width <= allocation_width) { if (path_bar->fake_root) first_button = path_bar->fake_root; else first_button = g_list_last (path_bar->button_list); } else { gboolean reached_end = FALSE; gint slider_space = 2 * (path_bar->spacing + path_bar->slider_width); if (path_bar->first_scrolled_button) first_button = path_bar->first_scrolled_button; else first_button = path_bar->button_list; need_sliders = TRUE; /* To see how much space we have, and how many buttons we can display. * We start at the first button, count forward until hit the new * button, then count backwards. */ /* Count down the path chain towards the end. */ gtk_widget_get_preferred_size (BUTTON_DATA (first_button->data)->button, &child_requisition, NULL); width = child_requisition.width; list = first_button->prev; while (list && !reached_end) { child = BUTTON_DATA (list->data)->button; gtk_widget_get_preferred_size (child, &child_requisition, NULL); if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width) reached_end = TRUE; else if (list == path_bar->fake_root) break; else width += child_requisition.width + path_bar->spacing; list = list->prev; } /* Finally, we walk up, seeing how many of the previous buttons we can * add */ while (first_button->next && !reached_end) { child = BUTTON_DATA (first_button->next->data)->button; gtk_widget_get_preferred_size (child, &child_requisition, NULL); if (width + child_requisition.width + path_bar->spacing + slider_space > allocation_width) { reached_end = TRUE; } else { width += child_requisition.width + path_bar->spacing; if (first_button == path_bar->fake_root) break; first_button = first_button->next; } } } /* Now, we allocate space to the buttons */ child_allocation.y = allocation->y; child_allocation.height = allocation->height; if (direction == GTK_TEXT_DIR_RTL) { child_allocation.x = allocation->x + allocation->width; if (need_sliders || path_bar->fake_root) { child_allocation.x -= (path_bar->spacing + path_bar->slider_width); up_slider_offset = allocation->width - path_bar->slider_width; } } else { child_allocation.x = allocation->x; if (need_sliders || path_bar->fake_root) { up_slider_offset = 0; child_allocation.x += (path_bar->spacing + path_bar->slider_width); } } for (list = first_button; list; list = list->prev) { GtkAllocation widget_allocation; ButtonData *button_data; button_data = BUTTON_DATA (list->data); child = button_data->button; gtk_widget_get_preferred_size (child, &child_requisition, NULL); child_allocation.width = MIN (child_requisition.width, allocation_width - (path_bar->spacing + path_bar->slider_width) * 2); if (direction == GTK_TEXT_DIR_RTL) child_allocation.x -= child_allocation.width; /* Check to see if we've don't have any more space to allocate buttons */ if (need_sliders && direction == GTK_TEXT_DIR_RTL) { gtk_widget_get_allocation (widget, &widget_allocation); if (child_allocation.x - path_bar->spacing - path_bar->slider_width < widget_allocation.x) break; } else if (need_sliders && direction == GTK_TEXT_DIR_LTR) { gtk_widget_get_allocation (widget, &widget_allocation); if (child_allocation.x + child_allocation.width + path_bar->spacing + path_bar->slider_width > widget_allocation.x + allocation_width) break; } if (child_allocation.width < child_requisition.width) { if (!gtk_widget_get_has_tooltip (child)) gtk_widget_set_tooltip_text (child, button_data->dir_name); } else if (gtk_widget_get_has_tooltip (child)) gtk_widget_set_tooltip_text (child, NULL); gtk_widget_set_child_visible (child, TRUE); gtk_widget_size_allocate (child, &child_allocation); if (direction == GTK_TEXT_DIR_RTL) child_allocation.x -= path_bar->spacing; else child_allocation.x += child_allocation.width + path_bar->spacing; } /* Now we go hide all the widgets that don't fit */ while (list) { gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE); list = list->prev; } for (list = first_button->next; list; list = list->next) { gtk_widget_set_child_visible (BUTTON_DATA (list->data)->button, FALSE); } if (need_sliders || path_bar->fake_root) { child_allocation.width = path_bar->slider_width; child_allocation.x = up_slider_offset + allocation->x; gtk_widget_size_allocate (path_bar->up_slider_button, &child_allocation); gtk_widget_set_child_visible (path_bar->up_slider_button, TRUE); gtk_widget_show_all (path_bar->up_slider_button); } else gtk_widget_set_child_visible (path_bar->up_slider_button, FALSE); if (need_sliders) { child_allocation.width = path_bar->slider_width; if (direction == GTK_TEXT_DIR_RTL) child_allocation.x = 0; else child_allocation.x = allocation->width - path_bar->slider_width; child_allocation.x += allocation->x; gtk_widget_size_allocate (path_bar->down_slider_button, &child_allocation); gtk_widget_set_child_visible (path_bar->down_slider_button, TRUE); gtk_widget_show_all (path_bar->down_slider_button); gtk_path_bar_update_slider_buttons (path_bar); } else gtk_widget_set_child_visible (path_bar->down_slider_button, FALSE); } static void gtk_path_bar_style_updated (GtkWidget *widget) { GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->style_updated (widget); gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget)); } static void gtk_path_bar_screen_changed (GtkWidget *widget, GdkScreen *previous_screen) { if (GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed) GTK_WIDGET_CLASS (gtk_path_bar_parent_class)->screen_changed (widget, previous_screen); /* We might nave a new settings, so we remove the old one */ if (previous_screen) remove_settings_signal (GTK_PATH_BAR (widget), previous_screen); gtk_path_bar_check_icon_theme (GTK_PATH_BAR (widget)); } static gboolean gtk_path_bar_scroll (GtkWidget *widget, GdkEventScroll *event) { switch (event->direction) { case GDK_SCROLL_RIGHT: case GDK_SCROLL_DOWN: gtk_path_bar_scroll_down (GTK_PATH_BAR (widget)); break; case GDK_SCROLL_LEFT: case GDK_SCROLL_UP: gtk_path_bar_scroll_up (GTK_PATH_BAR (widget)); break; } return TRUE; } static void gtk_path_bar_add (GtkContainer *container, GtkWidget *widget) { gtk_widget_set_parent (widget, GTK_WIDGET (container)); } static void gtk_path_bar_remove_1 (GtkContainer *container, GtkWidget *widget) { gboolean was_visible = gtk_widget_get_visible (widget); gtk_widget_unparent (widget); if (was_visible) gtk_widget_queue_resize (GTK_WIDGET (container)); } static void gtk_path_bar_remove (GtkContainer *container, GtkWidget *widget) { GtkPathBar *path_bar; GList *children; path_bar = GTK_PATH_BAR (container); if (widget == path_bar->up_slider_button) { gtk_path_bar_remove_1 (container, widget); path_bar->up_slider_button = NULL; return; } if (widget == path_bar->down_slider_button) { gtk_path_bar_remove_1 (container, widget); path_bar->down_slider_button = NULL; return; } children = path_bar->button_list; while (children) { if (widget == BUTTON_DATA (children->data)->button) { gtk_path_bar_remove_1 (container, widget); path_bar->button_list = g_list_remove_link (path_bar->button_list, children); g_list_free (children); return; } children = children->next; } } static void gtk_path_bar_forall (GtkContainer *container, gboolean include_internals, GtkCallback callback, gpointer callback_data) { GtkPathBar *path_bar; GList *children; g_return_if_fail (callback != NULL); path_bar = GTK_PATH_BAR (container); children = path_bar->button_list; while (children) { GtkWidget *child; child = BUTTON_DATA (children->data)->button; children = children->next; (* callback) (child, callback_data); } if (path_bar->up_slider_button) (* callback) (path_bar->up_slider_button, callback_data); if (path_bar->down_slider_button) (* callback) (path_bar->down_slider_button, callback_data); } static void gtk_path_bar_scroll_down (GtkPathBar *path_bar) { GtkAllocation allocation, button_allocation; GList *list; GList *down_button = NULL; gint space_available; if (path_bar->ignore_click) { path_bar->ignore_click = FALSE; return; } if (gtk_widget_get_child_visible (BUTTON_DATA (path_bar->button_list->data)->button)) { /* Return if the last button is already visible */ return; } gtk_widget_queue_resize (GTK_WIDGET (path_bar)); /* We find the button at the 'down' end that we have to make * visible */ for (list = path_bar->button_list; list; list = list->next) { if (list->next && gtk_widget_get_child_visible (BUTTON_DATA (list->next->data)->button)) { down_button = list; break; } } gtk_widget_get_allocation (GTK_WIDGET (path_bar), &allocation); gtk_widget_get_allocation (BUTTON_DATA (down_button->data)->button, &button_allocation); space_available = (allocation.width - 2 * path_bar->spacing - 2 * path_bar->slider_width - button_allocation.width); path_bar->first_scrolled_button = down_button; /* We have space_available free space that's not being used. * So we walk down from the end, adding buttons until we use all free space. */ while (space_available > 0) { path_bar->first_scrolled_button = down_button; down_button = down_button->next; if (!down_button) break; space_available -= (button_allocation.width + path_bar->spacing); } } static void gtk_path_bar_scroll_up (GtkPathBar *path_bar) { GList *list; if (path_bar->ignore_click) { path_bar->ignore_click = FALSE; return; } list = g_list_last (path_bar->button_list); if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button)) { /* Return if the first button is already visible */ return; } gtk_widget_queue_resize (GTK_WIDGET (path_bar)); for ( ; list; list = list->prev) { if (list->prev && gtk_widget_get_child_visible (BUTTON_DATA (list->prev->data)->button)) { if (list->prev == path_bar->fake_root) path_bar->fake_root = NULL; path_bar->first_scrolled_button = list; return; } } } static gboolean gtk_path_bar_scroll_timeout (GtkPathBar *path_bar) { gboolean retval = FALSE; if (path_bar->timer) { if (path_bar->scrolling_up) gtk_path_bar_scroll_up (path_bar); else if (path_bar->scrolling_down) gtk_path_bar_scroll_down (path_bar); if (path_bar->need_timer) { GtkSettings *settings = gtk_widget_get_settings (GTK_WIDGET (path_bar)); guint timeout; g_object_get (settings, "gtk-timeout-repeat", &timeout, NULL); path_bar->need_timer = FALSE; path_bar->timer = gdk_threads_add_timeout (timeout * SCROLL_DELAY_FACTOR, (GSourceFunc)gtk_path_bar_scroll_timeout, path_bar); } else retval = TRUE; } return retval; } static void gtk_path_bar_stop_scrolling (GtkPathBar *path_bar) { if (path_bar->timer) { g_source_remove (path_bar->timer); path_bar->timer = 0; path_bar->need_timer = FALSE; } } static gboolean gtk_path_bar_slider_up_defocus (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar) { GList *list; GList *up_button = NULL; if (event->type != GDK_FOCUS_CHANGE) return FALSE; for (list = g_list_last (path_bar->button_list); list; list = list->prev) { if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button)) { up_button = list; break; } } /* don't let the focus vanish */ if ((!gtk_widget_is_sensitive (path_bar->up_slider_button)) || (!gtk_widget_get_child_visible (path_bar->up_slider_button))) gtk_widget_grab_focus (BUTTON_DATA (up_button->data)->button); return FALSE; } static gboolean gtk_path_bar_slider_down_defocus (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar) { GList *list; GList *down_button = NULL; if (event->type != GDK_FOCUS_CHANGE) return FALSE; for (list = path_bar->button_list; list; list = list->next) { if (gtk_widget_get_child_visible (BUTTON_DATA (list->data)->button)) { down_button = list; break; } } /* don't let the focus vanish */ if ((!gtk_widget_is_sensitive (path_bar->down_slider_button)) || (!gtk_widget_get_child_visible (path_bar->down_slider_button))) gtk_widget_grab_focus (BUTTON_DATA (down_button->data)->button); return FALSE; } static gboolean gtk_path_bar_slider_button_press (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar) { if (event->type != GDK_BUTTON_PRESS || event->button != 1) return FALSE; path_bar->ignore_click = FALSE; if (widget == path_bar->up_slider_button) { path_bar->scrolling_down = FALSE; path_bar->scrolling_up = TRUE; gtk_path_bar_scroll_up (path_bar); } else if (widget == path_bar->down_slider_button) { path_bar->scrolling_up = FALSE; path_bar->scrolling_down = TRUE; gtk_path_bar_scroll_down (path_bar); } if (!path_bar->timer) { GtkSettings *settings = gtk_widget_get_settings (widget); guint timeout; g_object_get (settings, "gtk-timeout-initial", &timeout, NULL); path_bar->need_timer = TRUE; path_bar->timer = gdk_threads_add_timeout (timeout, (GSourceFunc)gtk_path_bar_scroll_timeout, path_bar); } return FALSE; } static gboolean gtk_path_bar_slider_button_release (GtkWidget *widget, GdkEventButton *event, GtkPathBar *path_bar) { if (event->type != GDK_BUTTON_RELEASE) return FALSE; path_bar->ignore_click = TRUE; gtk_path_bar_stop_scrolling (path_bar); return FALSE; } static void gtk_path_bar_grab_notify (GtkWidget *widget, gboolean was_grabbed) { if (!was_grabbed) gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget)); } static void gtk_path_bar_state_changed (GtkWidget *widget, GtkStateType previous_state) { if (!gtk_widget_is_sensitive (widget)) gtk_path_bar_stop_scrolling (GTK_PATH_BAR (widget)); } /* Changes the icons wherever it is needed */ static void reload_icons (GtkPathBar *path_bar) { GList *list; if (path_bar->root_icon) { g_object_unref (path_bar->root_icon); path_bar->root_icon = NULL; } if (path_bar->home_icon) { g_object_unref (path_bar->home_icon); path_bar->home_icon = NULL; } if (path_bar->desktop_icon) { g_object_unref (path_bar->desktop_icon); path_bar->desktop_icon = NULL; } for (list = path_bar->button_list; list; list = list->next) { ButtonData *button_data; gboolean current_dir; button_data = BUTTON_DATA (list->data); if (button_data->type != NORMAL_BUTTON) { current_dir = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)); gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir); } } } static void change_icon_theme (GtkPathBar *path_bar) { GtkSettings *settings; gint width, height; settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar))); if (gtk_icon_size_lookup_for_settings (settings, GTK_ICON_SIZE_MENU, &width, &height)) path_bar->icon_size = MAX (width, height); else path_bar->icon_size = FALLBACK_ICON_SIZE; reload_icons (path_bar); } /* Callback used when a GtkSettings value changes */ static void settings_notify_cb (GObject *object, GParamSpec *pspec, GtkPathBar *path_bar) { const char *name; name = g_param_spec_get_name (pspec); if (! strcmp (name, "gtk-icon-theme-name") || ! strcmp (name, "gtk-icon-sizes")) change_icon_theme (path_bar); } static void gtk_path_bar_check_icon_theme (GtkPathBar *path_bar) { GtkSettings *settings; if (path_bar->settings_signal_id) return; settings = gtk_settings_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (path_bar))); path_bar->settings_signal_id = g_signal_connect (settings, "notify", G_CALLBACK (settings_notify_cb), path_bar); change_icon_theme (path_bar); } /* Public functions and their helpers */ static void gtk_path_bar_clear_buttons (GtkPathBar *path_bar) { while (path_bar->button_list != NULL) { gtk_container_remove (GTK_CONTAINER (path_bar), BUTTON_DATA (path_bar->button_list->data)->button); } path_bar->first_scrolled_button = NULL; path_bar->fake_root = NULL; } static void button_clicked_cb (GtkWidget *button, gpointer data) { ButtonData *button_data; GtkPathBar *path_bar; GList *button_list; gboolean child_is_hidden; GFile *child_file; button_data = BUTTON_DATA (data); if (button_data->ignore_changes) return; path_bar = GTK_PATH_BAR (gtk_widget_get_parent (button)); button_list = g_list_find (path_bar->button_list, button_data); g_assert (button_list != NULL); g_signal_handlers_block_by_func (button, G_CALLBACK (button_clicked_cb), data); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE); g_signal_handlers_unblock_by_func (button, G_CALLBACK (button_clicked_cb), data); if (button_list->prev) { ButtonData *child_data; child_data = BUTTON_DATA (button_list->prev->data); child_file = child_data->file; child_is_hidden = child_data->file_is_hidden; } else { child_file = NULL; child_is_hidden = FALSE; } g_signal_emit (path_bar, path_bar_signals [PATH_CLICKED], 0, button_data->file, child_file, child_is_hidden); } struct SetButtonImageData { GtkPathBar *path_bar; ButtonData *button_data; }; static void set_button_image_get_info_cb (GCancellable *cancellable, GFileInfo *info, const GError *error, gpointer user_data) { gboolean cancelled = g_cancellable_is_cancelled (cancellable); GdkPixbuf *pixbuf; struct SetButtonImageData *data = user_data; if (cancellable != data->button_data->cancellable) goto out; data->button_data->cancellable = NULL; if (!data->button_data->button) { g_free (data->button_data); goto out; } if (cancelled || error) goto out; pixbuf = _gtk_file_info_render_icon (info, GTK_WIDGET (data->path_bar), data->path_bar->icon_size); gtk_image_set_from_pixbuf (GTK_IMAGE (data->button_data->image), pixbuf); switch (data->button_data->type) { case HOME_BUTTON: if (data->path_bar->home_icon) g_object_unref (pixbuf); else data->path_bar->home_icon = pixbuf; break; case DESKTOP_BUTTON: if (data->path_bar->desktop_icon) g_object_unref (pixbuf); else data->path_bar->desktop_icon = pixbuf; break; default: break; }; out: g_free (data); g_object_unref (cancellable); } static void set_button_image (GtkPathBar *path_bar, ButtonData *button_data) { GtkFileSystemVolume *volume; struct SetButtonImageData *data; switch (button_data->type) { case ROOT_BUTTON: if (path_bar->root_icon != NULL) { gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon); break; } volume = _gtk_file_system_get_volume_for_file (path_bar->file_system, path_bar->root_file); if (volume == NULL) return; path_bar->root_icon = _gtk_file_system_volume_render_icon (volume, GTK_WIDGET (path_bar), path_bar->icon_size, NULL); _gtk_file_system_volume_unref (volume); gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->root_icon); break; case HOME_BUTTON: if (path_bar->home_icon != NULL) { gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->home_icon); break; } data = g_new0 (struct SetButtonImageData, 1); data->path_bar = path_bar; data->button_data = button_data; if (button_data->cancellable) g_cancellable_cancel (button_data->cancellable); button_data->cancellable = _gtk_file_system_get_info (path_bar->file_system, path_bar->home_file, "standard::icon", set_button_image_get_info_cb, data); break; case DESKTOP_BUTTON: if (path_bar->desktop_icon != NULL) { gtk_image_set_from_pixbuf (GTK_IMAGE (button_data->image), path_bar->desktop_icon); break; } data = g_new0 (struct SetButtonImageData, 1); data->path_bar = path_bar; data->button_data = button_data; if (button_data->cancellable) g_cancellable_cancel (button_data->cancellable); button_data->cancellable = _gtk_file_system_get_info (path_bar->file_system, path_bar->desktop_file, "standard::icon", set_button_image_get_info_cb, data); break; default: break; } } static void button_data_free (ButtonData *button_data) { if (button_data->file) g_object_unref (button_data->file); button_data->file = NULL; g_free (button_data->dir_name); button_data->dir_name = NULL; button_data->button = NULL; if (button_data->cancellable) g_cancellable_cancel (button_data->cancellable); else g_free (button_data); } static const char * get_dir_name (ButtonData *button_data) { return button_data->dir_name; } /* We always want to request the same size for the label, whether * or not the contents are bold */ static void set_label_size_request (GtkWidget *alignment, ButtonData *button_data) { const gchar *dir_name = get_dir_name (button_data); PangoLayout *layout = gtk_widget_create_pango_layout (button_data->label, dir_name); gint width, height, bold_width, bold_height; gchar *markup; pango_layout_get_pixel_size (layout, &width, &height); markup = g_markup_printf_escaped ("%s", dir_name); pango_layout_set_markup (layout, markup, -1); g_free (markup); pango_layout_get_pixel_size (layout, &bold_width, &bold_height); gtk_widget_set_size_request (alignment, MAX (width, bold_width), MAX (height, bold_height)); g_object_unref (layout); } static void gtk_path_bar_update_button_appearance (GtkPathBar *path_bar, ButtonData *button_data, gboolean current_dir) { const gchar *dir_name = get_dir_name (button_data); if (button_data->label != NULL) { if (current_dir) { char *markup; markup = g_markup_printf_escaped ("%s", dir_name); gtk_label_set_markup (GTK_LABEL (button_data->label), markup); g_free (markup); } else { gtk_label_set_text (GTK_LABEL (button_data->label), dir_name); } } if (button_data->image != NULL) { set_button_image (path_bar, button_data); } if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button_data->button)) != current_dir) { button_data->ignore_changes = TRUE; gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button_data->button), current_dir); button_data->ignore_changes = FALSE; } } static ButtonType find_button_type (GtkPathBar *path_bar, GFile *file) { if (path_bar->root_file != NULL && g_file_equal (file, path_bar->root_file)) return ROOT_BUTTON; if (path_bar->home_file != NULL && g_file_equal (file, path_bar->home_file)) return HOME_BUTTON; if (path_bar->desktop_file != NULL && g_file_equal (file, path_bar->desktop_file)) return DESKTOP_BUTTON; return NORMAL_BUTTON; } static void button_drag_data_get_cb (GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data, guint info, guint time_, gpointer data) { ButtonData *button_data; GtkPathBar *path_bar; char *uris[2]; button_data = data; path_bar = GTK_PATH_BAR (gtk_widget_get_parent (widget)); /* the button's parent *is* the path bar */ uris[0] = g_file_get_uri (button_data->file); uris[1] = NULL; gtk_selection_data_set_uris (selection_data, uris); g_free (uris[0]); } static ButtonData * make_directory_button (GtkPathBar *path_bar, const char *dir_name, GFile *file, gboolean current_dir, gboolean file_is_hidden) { AtkObject *atk_obj; GtkWidget *child = NULL; GtkWidget *label_alignment = NULL; ButtonData *button_data; file_is_hidden = !! file_is_hidden; /* Is it a special button? */ button_data = g_new0 (ButtonData, 1); button_data->type = find_button_type (path_bar, file); button_data->button = gtk_toggle_button_new (); atk_obj = gtk_widget_get_accessible (button_data->button); gtk_button_set_focus_on_click (GTK_BUTTON (button_data->button), FALSE); switch (button_data->type) { case ROOT_BUTTON: button_data->image = gtk_image_new (); child = button_data->image; button_data->label = NULL; atk_object_set_name (atk_obj, _("File System Root")); break; case HOME_BUTTON: case DESKTOP_BUTTON: button_data->image = gtk_image_new (); button_data->label = gtk_label_new (NULL); label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0); gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label); child = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2); gtk_box_pack_start (GTK_BOX (child), button_data->image, FALSE, FALSE, 0); gtk_box_pack_start (GTK_BOX (child), label_alignment, FALSE, FALSE, 0); break; case NORMAL_BUTTON: default: button_data->label = gtk_label_new (NULL); gtk_label_set_ellipsize (GTK_LABEL (button_data->label), PANGO_ELLIPSIZE_END); label_alignment = gtk_alignment_new (0.5, 0.5, 1.0, 1.0); gtk_container_add (GTK_CONTAINER (label_alignment), button_data->label); child = label_alignment; button_data->image = NULL; } button_data->dir_name = g_strdup (dir_name); button_data->file = g_object_ref (file); button_data->file_is_hidden = file_is_hidden; /* FIXME: Maybe we dont need this alignment at all and we can * use GtkMisc aligments or even GtkWidget:halign/valign center. * * The following function ensures that the alignment will always * request the same size whether the button's text is bold or not. */ if (label_alignment) set_label_size_request (label_alignment, button_data); gtk_container_add (GTK_CONTAINER (button_data->button), child); gtk_widget_show_all (button_data->button); gtk_path_bar_update_button_appearance (path_bar, button_data, current_dir); g_signal_connect (button_data->button, "clicked", G_CALLBACK (button_clicked_cb), button_data); g_object_weak_ref (G_OBJECT (button_data->button), (GWeakNotify) button_data_free, button_data); gtk_drag_source_set (button_data->button, GDK_BUTTON1_MASK, NULL, 0, GDK_ACTION_COPY); gtk_drag_source_add_uri_targets (button_data->button); g_signal_connect (button_data->button, "drag-data-get", G_CALLBACK (button_drag_data_get_cb), button_data); return button_data; } static gboolean gtk_path_bar_check_parent_path (GtkPathBar *path_bar, GFile *file, GtkFileSystem *file_system) { GList *list; GList *current_path = NULL; gboolean need_new_fake_root = FALSE; for (list = path_bar->button_list; list; list = list->next) { ButtonData *button_data; button_data = list->data; if (g_file_equal (file, button_data->file)) { current_path = list; break; } if (list == path_bar->fake_root) need_new_fake_root = TRUE; } if (current_path) { if (need_new_fake_root) { path_bar->fake_root = NULL; for (list = current_path; list; list = list->next) { ButtonData *button_data; button_data = list->data; if (BUTTON_IS_FAKE_ROOT (button_data)) { path_bar->fake_root = list; break; } } } for (list = path_bar->button_list; list; list = list->next) { gtk_path_bar_update_button_appearance (path_bar, BUTTON_DATA (list->data), (list == current_path) ? TRUE : FALSE); } if (!gtk_widget_get_child_visible (BUTTON_DATA (current_path->data)->button)) { path_bar->first_scrolled_button = current_path; gtk_widget_queue_resize (GTK_WIDGET (path_bar)); } return TRUE; } return FALSE; } struct SetFileInfo { GFile *file; GFile *parent_file; GtkPathBar *path_bar; GList *new_buttons; GList *fake_root; gboolean first_directory; }; static void gtk_path_bar_set_file_finish (struct SetFileInfo *info, gboolean result) { if (result) { GList *l; gtk_path_bar_clear_buttons (info->path_bar); info->path_bar->button_list = g_list_reverse (info->new_buttons); info->path_bar->fake_root = info->fake_root; for (l = info->path_bar->button_list; l; l = l->next) { GtkWidget *button = BUTTON_DATA (l->data)->button; gtk_container_add (GTK_CONTAINER (info->path_bar), button); } } else { GList *l; for (l = info->new_buttons; l; l = l->next) { ButtonData *button_data; button_data = BUTTON_DATA (l->data); gtk_widget_destroy (button_data->button); } g_list_free (info->new_buttons); } if (info->file) g_object_unref (info->file); if (info->parent_file) g_object_unref (info->parent_file); g_free (info); } static void gtk_path_bar_get_info_callback (GCancellable *cancellable, GFileInfo *info, const GError *error, gpointer data) { gboolean cancelled = g_cancellable_is_cancelled (cancellable); struct SetFileInfo *file_info = data; ButtonData *button_data; const gchar *display_name; gboolean is_hidden; if (cancellable != file_info->path_bar->get_info_cancellable) { gtk_path_bar_set_file_finish (file_info, FALSE); g_object_unref (cancellable); return; } g_object_unref (cancellable); file_info->path_bar->get_info_cancellable = NULL; if (cancelled || !info) { gtk_path_bar_set_file_finish (file_info, FALSE); return; } display_name = g_file_info_get_display_name (info); is_hidden = g_file_info_get_is_hidden (info) || g_file_info_get_is_backup (info); gtk_widget_push_composite_child (); button_data = make_directory_button (file_info->path_bar, display_name, file_info->file, file_info->first_directory, is_hidden); gtk_widget_pop_composite_child (); g_object_unref (file_info->file); file_info->new_buttons = g_list_prepend (file_info->new_buttons, button_data); if (BUTTON_IS_FAKE_ROOT (button_data)) file_info->fake_root = file_info->new_buttons; file_info->file = file_info->parent_file; file_info->first_directory = FALSE; if (!file_info->file) { gtk_path_bar_set_file_finish (file_info, TRUE); return; } file_info->parent_file = g_file_get_parent (file_info->file); file_info->path_bar->get_info_cancellable = _gtk_file_system_get_info (file_info->path_bar->file_system, file_info->file, "standard::display-name,standard::is-hidden,standard::is-backup", gtk_path_bar_get_info_callback, file_info); } gboolean _gtk_path_bar_set_file (GtkPathBar *path_bar, GFile *file, const gboolean keep_trail, GError **error) { struct SetFileInfo *info; gboolean result; g_return_val_if_fail (GTK_IS_PATH_BAR (path_bar), FALSE); g_return_val_if_fail (G_IS_FILE (file), FALSE); result = TRUE; /* Check whether the new path is already present in the pathbar as buttons. * This could be a parent directory or a previous selected subdirectory. */ if (keep_trail && gtk_path_bar_check_parent_path (path_bar, file, path_bar->file_system)) return TRUE; info = g_new0 (struct SetFileInfo, 1); info->file = g_object_ref (file); info->path_bar = path_bar; info->first_directory = TRUE; info->parent_file = g_file_get_parent (info->file); if (path_bar->get_info_cancellable) g_cancellable_cancel (path_bar->get_info_cancellable); path_bar->get_info_cancellable = _gtk_file_system_get_info (path_bar->file_system, info->file, "standard::display-name,standard::is-hidden,standard::is-backup", gtk_path_bar_get_info_callback, info); return TRUE; } /* FIXME: This should be a construct-only property */ void _gtk_path_bar_set_file_system (GtkPathBar *path_bar, GtkFileSystem *file_system) { const char *home; g_return_if_fail (GTK_IS_PATH_BAR (path_bar)); g_assert (path_bar->file_system == NULL); path_bar->file_system = g_object_ref (file_system); home = g_get_home_dir (); if (home != NULL) { const gchar *desktop; path_bar->home_file = g_file_new_for_path (home); /* FIXME: Need file system backend specific way of getting the * Desktop path. */ desktop = g_get_user_special_dir (G_USER_DIRECTORY_DESKTOP); if (desktop != NULL) path_bar->desktop_file = g_file_new_for_path (desktop); else path_bar->desktop_file = NULL; } else { path_bar->home_file = NULL; path_bar->desktop_file = NULL; } path_bar->root_file = g_file_new_for_path ("/"); } /** * _gtk_path_bar_up: * @path_bar: a #GtkPathBar * * If the selected button in the pathbar is not the furthest button "up" (in the * root direction), act as if the user clicked on the next button up. **/ void _gtk_path_bar_up (GtkPathBar *path_bar) { GList *l; for (l = path_bar->button_list; l; l = l->next) { GtkWidget *button = BUTTON_DATA (l->data)->button; if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button))) { if (l->next) { GtkWidget *next_button = BUTTON_DATA (l->next->data)->button; button_clicked_cb (next_button, l->next->data); } break; } } } /** * _gtk_path_bar_down: * @path_bar: a #GtkPathBar * * If the selected button in the pathbar is not the furthest button "down" (in the * leaf direction), act as if the user clicked on the next button down. **/ void _gtk_path_bar_down (GtkPathBar *path_bar) { GList *l; for (l = path_bar->button_list; l; l = l->next) { GtkWidget *button = BUTTON_DATA (l->data)->button; if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button))) { if (l->prev) { GtkWidget *prev_button = BUTTON_DATA (l->prev->data)->button; button_clicked_cb (prev_button, l->prev->data); } break; } } }