[ 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

2 files changed, 31 insertions, 0 deletions

diff --git a/addressbook/backend/ebook/e-book.c b/addressbook/backend/ebook/e-book.c
index fd9f233d8c..cad203ad44 100644
--- a/addressbook/backend/ebook/e-book.c
+++ b/addressbook/backend/ebook/e-book.c
@@ -18,6 +18,7 @@
 #include "e-card-cursor.h"
 #include "e-book-listener.h"
 #include "e-book.h"
+#include "e-util/e-component-listener.h"
 
 GtkObjectClass *e_book_parent_class;
 
@@ -34,6 +35,7 @@ struct _EBookPrivate {
 	GList *iter;
 
 	EBookListener	      *listener;
+	EComponentListener    *comp_listener;
 
 	GNOME_Evolution_Addressbook_Book         corba_book;
 
@@ -55,6 +57,7 @@ enum {
 	OPEN_PROGRESS,
 	WRITABLE_STATUS,
 	LINK_STATUS,
+	BACKEND_DIED,
 	LAST_SIGNAL
 };
 
@@ -397,6 +400,15 @@ e_book_do_response_get_changes (EBook                 *book,
 }
 
 static void
+backend_died_cb (EComponentListener *cl, gpointer user_data)
+{
+	EBook *book = user_data;
+
+	book->priv->load_state = URINotLoaded;
+        gtk_signal_emit (GTK_OBJECT (book), e_book_signals [BACKEND_DIED]);
+}
+
+static void
 e_book_do_response_open (EBook                 *book,
 			 EBookListenerResponse *resp)
 {
@@ -405,6 +417,10 @@ e_book_do_response_open (EBook                 *book,
 	if (resp->status == E_BOOK_STATUS_SUCCESS) {
 		book->priv->corba_book  = resp->book;
 		book->priv->load_state  = URILoaded;
+
+		book->priv->comp_listener = e_component_listener_new (book->priv->corba_book, 0);
+                gtk_signal_connect (GTK_OBJECT (book->priv->comp_listener), "component_died",
+                                    GTK_SIGNAL_FUNC (backend_died_cb), book);
 	}
 
 	op = e_book_pop_op (book);
@@ -1474,6 +1490,12 @@ e_book_destroy (GtkObject *object)
 		}
 	}
 
+        if (book->priv->comp_listener) {
+                gtk_signal_disconnect_by_data (GTK_OBJECT (book->priv->comp_listener), book);
+                gtk_object_unref (GTK_OBJECT (book->priv->comp_listener));
+                book->priv->comp_listener = NULL;
+        }
+
 	g_free (book->priv->uri);
 
 	g_free (book->priv);
@@ -1506,6 +1528,14 @@ e_book_class_init (EBookClass *klass)
 				GTK_TYPE_NONE, 1,
 				GTK_TYPE_BOOL);
 
+	e_book_signals [BACKEND_DIED] =
+		gtk_signal_new ("backend_died",
+				GTK_RUN_LAST,
+				object_class->type,
+				GTK_SIGNAL_OFFSET (EBookClass, backend_died),
+				gtk_marshal_NONE__NONE,
+				GTK_TYPE_NONE, 0);
+
 	gtk_object_class_add_signals (object_class, e_book_signals,
 				      LAST_SIGNAL);
 
diff --git a/addressbook/backend/ebook/e-book.h b/addressbook/backend/ebook/e-book.h
index e917279775..be90f52c04 100644
--- a/addressbook/backend/ebook/e-book.h
+++ b/addressbook/backend/ebook/e-book.h
@@ -38,6 +38,7 @@ struct _EBookClass {
 	void (* open_progress)   (EBook *book, const char *msg, short percent);
 	void (* link_status)     (EBook *book, gboolean connected);
 	void (* writable_status) (EBook *book, gboolean writable);
+	void (* backend_died)    (EBook *book);
 };
 
 /* Callbacks for asynchronous functions. */