[ fixes #20347 ] hook up the backend_died signal. (backend_died): new

2002-08-29  Chris Toshok  <toshok@ximian.com>

	[ fixes #20347 ]
	* gui/widgets/e-addressbook-view.c (e_addressbook_view_init): hook
	up the backend_died signal.
	(backend_died): new function, pop up an error dialog saying the
	backend died.

	* gui/widgets/e-addressbook-model.c (backend_died): new function,
	emit the backend_died signal.
	(e_addressbook_model_class_init): create the backend_died signal.
	(e_addressbook_model_init): init backend_died_id
	(e_addressbook_model_set_arg): disconnect the backend_died signal
	from the old book and hook it up to the new book.

	* gui/widgets/e-addressbook-model.h: add the backend_died signal.

	* backend/ebook/e-book.c (backend_died_cb): new function, emit the
	backend_died signal.
	(e_book_do_response_open): create the component listener and hook
	up the backend_died signal.
	(e_book_destroy): disconnect the component listener and unref it.

	* backend/ebook/e-book.h: add backend_died signal.

svn path=/trunk/; revision=17918

3 files changed, 45 insertions, 2 deletions

diff --git a/addressbook/gui/widgets/e-addressbook-model.c b/addressbook/gui/widgets/e-addressbook-model.c
index 881a8e4eed..7f59c2313c 100644
--- a/addressbook/gui/widgets/e-addressbook-model.c
+++ b/addressbook/gui/widgets/e-addressbook-model.c
@@ -44,6 +44,7 @@ enum {
 	CARD_CHANGED,
 	MODEL_CHANGED,
 	STOP_STATE_CHANGED,
+	BACKEND_DIED,
 	LAST_SIGNAL
 };
 
@@ -260,6 +261,14 @@ writable_status (EBook *book,
 }
 
 static void
+backend_died (EBook *book,
+	      EAddressbookModel *model)
+{
+	gtk_signal_emit (GTK_OBJECT (model),
+			 e_addressbook_model_signals [BACKEND_DIED]);
+}
+
+static void
 e_addressbook_model_class_init (GtkObjectClass *object_class)
 {
 	parent_class = gtk_type_class (PARENT_TYPE);
@@ -347,6 +356,14 @@ e_addressbook_model_class_init (GtkObjectClass *object_class)
 				gtk_marshal_NONE__NONE,
 				GTK_TYPE_NONE, 0);
 
+	e_addressbook_model_signals [BACKEND_DIED] =
+		gtk_signal_new ("backend_died",
+				GTK_RUN_LAST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (EAddressbookModelClass, backend_died),
+				gtk_marshal_NONE__NONE,
+				GTK_TYPE_NONE, 0);
+
 	gtk_object_class_add_signals (object_class, e_addressbook_model_signals, LAST_SIGNAL);
 }
 
@@ -363,6 +380,7 @@ e_addressbook_model_init (GtkObject *object)
 	model->modify_card_id = 0;
 	model->status_message_id = 0;
 	model->writable_status_id = 0;
+	model->backend_died_id = 0;
 	model->sequence_complete_id = 0;
 	model->data = NULL;
 	model->data_count = 0;
@@ -481,9 +499,13 @@ e_addressbook_model_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 			if (model->writable_status_id)
 				gtk_signal_disconnect(GTK_OBJECT (model->book),
 						      model->writable_status_id);
-
 			model->writable_status_id = 0;
 
+			if (model->backend_died_id)
+				gtk_signal_disconnect(GTK_OBJECT (model->book),
+						      model->backend_died_id);
+			model->backend_died_id = 0;
+
 			gtk_object_unref(GTK_OBJECT(model->book));
 		}
 		model->book = E_BOOK(GTK_VALUE_OBJECT (*arg));
@@ -495,6 +517,9 @@ e_addressbook_model_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 			gtk_signal_connect (GTK_OBJECT(model->book),
 					    "writable_status",
 					    writable_status, model);
+			gtk_signal_connect (GTK_OBJECT(model->book),
+					    "backend_died",
+					    backend_died, model);
 		}
 		break;
 	case ARG_QUERY:
diff --git a/addressbook/gui/widgets/e-addressbook-model.h b/addressbook/gui/widgets/e-addressbook-model.h
index 57644dbca6..eb1004499a 100644
--- a/addressbook/gui/widgets/e-addressbook-model.h
+++ b/addressbook/gui/widgets/e-addressbook-model.h
@@ -29,7 +29,7 @@ struct _EAddressbookModel {
 	int data_count;
 	int allocated_count;
 
-	int create_card_id, remove_card_id, modify_card_id, status_message_id, writable_status_id, sequence_complete_id;
+	int create_card_id, remove_card_id, modify_card_id, status_message_id, writable_status_id, sequence_complete_id, backend_died_id;
 
 	guint search_in_progress : 1;
 	guint editable : 1;
@@ -53,6 +53,7 @@ struct _EAddressbookModelClass {
 	void (*card_changed)       (EAddressbookModel *model, gint index);
 	void (*model_changed)      (EAddressbookModel *model);
 	void (*stop_state_changed) (EAddressbookModel *model);
+	void (*backend_died)       (EAddressbookModel *model);
 };
 
 
diff --git a/addressbook/gui/widgets/e-addressbook-view.c b/addressbook/gui/widgets/e-addressbook-view.c
index c8052b4216..f12a324953 100644
--- a/addressbook/gui/widgets/e-addressbook-view.c
+++ b/addressbook/gui/widgets/e-addressbook-view.c
@@ -83,6 +83,7 @@ static void search_result      (GtkObject *object, EBookViewStatus status, EAddr
 static void folder_bar_message (GtkObject *object, const gchar *status, EAddressbookView *eav);
 static void stop_state_changed (GtkObject *object, EAddressbookView *eav);
 static void writable_status (GtkObject *object, gboolean writable, EAddressbookView *eav);
+static void backend_died (GtkObject *object, EAddressbookView *eav);
 static void command_state_change (EAddressbookView *eav);
 static void alphabet_state_change (EAddressbookView *eav, gunichar letter);
 
@@ -252,6 +253,11 @@ e_addressbook_view_init (EAddressbookView *eav)
 			    GTK_SIGNAL_FUNC (writable_status),
 			    eav);
 
+	gtk_signal_connect (GTK_OBJECT(eav->model),
+			    "backend_died",
+			    GTK_SIGNAL_FUNC (backend_died),
+			    eav);
+
 	eav->editable = FALSE;
 	eav->book = NULL;
 	eav->query = g_strdup (SHOW_ALL_SEARCH);
@@ -1361,6 +1367,17 @@ alphabet_state_change (EAddressbookView *eav, gunichar letter)
 }
 
 static void
+backend_died (GtkObject *object, EAddressbookView *eav)
+{
+	char *message = g_strdup_printf (_("The addressbook backend for\n%s\nhas crashed. "
+					   "You will have to restart Evolution in order "
+					   "to use it again"),
+					 e_book_get_uri (eav->book));
+        gnome_error_dialog_parented (message, GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (eav))));
+        g_free (message);
+}
+
+static void
 create_table_view (EAddressbookView *view)
 {
 	ETableModel *adapter;