wncklet: disconnect signal handlers on destroy

Stop segfaults, warnings on removing in-process switcher, window-list
Fixes window list, workspace switcher. Window menu and show desktop no warnings or segfaults on removal when built in process

(squashed 9f43dd5c7c37b84960d06a98a4738ee40d8bfd50 + 2b17f4f461cff056ab0f4687a9ac673a16933f7c for 1.18 branch)

2 files changed, 28 insertions, 20 deletions

diff --git a/applets/wncklet/window-list.c b/applets/wncklet/window-list.c
index 35bdbd45..da232447 100644
--- a/applets/wncklet/window-list.c
+++ b/applets/wncklet/window-list.c
@@ -63,6 +63,7 @@ static void call_system_monitor(GtkAction* action, TasklistData* tasklist);
 static void display_properties_dialog(GtkAction* action, TasklistData* tasklist);
 static void display_help_dialog(GtkAction* action, TasklistData* tasklist);
 static void display_about_dialog(GtkAction* action, TasklistData* tasklist);
+static void destroy_tasklist(GtkWidget* widget, TasklistData* tasklist);
 
 static void tasklist_update(TasklistData* tasklist)
 {
@@ -147,16 +148,6 @@ static void applet_change_pixel_size(MatePanelApplet* applet, gint size, Tasklis
 	tasklist_update(tasklist);
 }
 
-static void destroy_tasklist(GtkWidget* widget, TasklistData* tasklist)
-{
-	g_object_unref(tasklist->settings);
-
-	if (tasklist->properties_dialog)
-		gtk_widget_destroy(tasklist->properties_dialog);
-
-	g_free(tasklist);
-}
-
 /* TODO: this is sad, should be used a function to retrieve  applications from
  *  .desktop or some like that. */
 static const char* system_monitors[] = {
@@ -694,3 +685,18 @@ static void display_properties_dialog(GtkAction* action, TasklistData* tasklist)
 	gtk_window_set_screen(GTK_WINDOW(tasklist->properties_dialog), gtk_widget_get_screen(tasklist->applet));
 	gtk_window_present(GTK_WINDOW(tasklist->properties_dialog));
 }
+
+static void destroy_tasklist(GtkWidget* widget, TasklistData* tasklist)
+{
+	g_signal_handlers_disconnect_by_data (G_OBJECT (tasklist->applet), tasklist);
+
+	g_signal_handlers_disconnect_by_data (tasklist->settings, tasklist);
+
+	g_object_unref(tasklist->settings);
+
+	if (tasklist->properties_dialog)
+		gtk_widget_destroy(tasklist->properties_dialog);
+
+	g_free(tasklist);
+
+}
diff --git a/applets/wncklet/workspace-switcher.c b/applets/wncklet/workspace-switcher.c
index f9d422ab..cdeca09c 100644
--- a/applets/wncklet/workspace-switcher.c
+++ b/applets/wncklet/workspace-switcher.c
@@ -86,6 +86,7 @@ typedef struct {
 static void display_properties_dialog(GtkAction* action, PagerData* pager);
 static void display_help_dialog(GtkAction* action, PagerData* pager);
 static void display_about_dialog(GtkAction* action, PagerData* pager);
+static void destroy_pager(GtkWidget* widget, PagerData* pager);
 
 static void pager_update(PagerData* pager)
 {
@@ -319,16 +320,6 @@ static gboolean applet_scroll(MatePanelApplet* applet, GdkEventScroll* event, Pa
 	return TRUE;
 }
 
-static void destroy_pager(GtkWidget* widget, PagerData* pager)
-{
-	g_object_unref (pager->settings);
-
-	if (pager->properties_dialog)
-		gtk_widget_destroy(pager->properties_dialog);
-
-	g_free(pager);
-}
-
 static const GtkActionEntry pager_menu_actions[] = {
 	{
 		"PagerPreferences",
@@ -967,3 +958,14 @@ static void display_properties_dialog(GtkAction* action, PagerData* pager)
 	gtk_window_set_screen(GTK_WINDOW(pager->properties_dialog), gtk_widget_get_screen(pager->applet));
 	gtk_window_present(GTK_WINDOW(pager->properties_dialog));
 }
+
+static void destroy_pager(GtkWidget* widget, PagerData* pager)
+{
+	g_signal_handlers_disconnect_by_data (pager->settings, pager);
+
+	g_object_unref (pager->settings);
+
+	if (pager->properties_dialog)
+		gtk_widget_destroy(pager->properties_dialog);
+	g_free(pager);
+}