use signal for octave_link::update_dbstop_marker * octave-qt-link.h (octave_qt_link): Derive from QObject. (octave_qt_link::update_dbstop_marker_signal): New signal. * libgui/src/module.mk (octave_gui_MOC): Include src/moc-octave-qt-link.cc in the list. * main-window.cc (main_window::construct): Connect octave_qt_link::update_dbstop_marker_signal to file_editor::handle_update_dbstop_marker_request. * octave-qt-link.cc (octave_qt_link::do_update_breakpoint): Emit signal instead of using event listener.

--- a/libgui/src/octave-qt-link.cc
+++ b/libgui/src/octave-qt-link.cc
@@ -107,12 +107,7 @@
 octave_qt_link::do_update_breakpoint (bool insert,
                                       const std::string& file, int line)
 {
-  if (event_listener)
-    {
-      event_listener->update_dbstop_marker (insert, file, line);
-
-      do_process_events ();
-    }
+  emit update_dbstop_marker_signal (insert, QString::fromStdString (file), line);
 }
 
 bool