merge event_accepted and event_reject into a single function * history-dockwidget.cc, history-dockwidget.h (history_dock_widget::handle_event): New function from merging history_dock_widget::event_accepted and history_dock_widget::event_reject into single fucntion with argument. * file-editor-tab.cc, file-editor-tab.h (file_editor_tab::handle_event): Likewise. * main-window.cc, main-window.h (main_window::handle_event): Likewise. * octave-event-observer.h (octave_event_observer::handle_event): New pure virtual function. (octave_event_observer::event_accepted, octave_event_observer::event_reject): Delete. * octave_link.cc, octave-link.h (octave_link::handle_event): Likewise. * workspace-model.cc, workspace-model.h (workspace_model::handle_event): Likewise. * octave-link.cc (octave_link::do_process_events): Call octave_event::handle_event with the return value from octave_event::perform instead of calling octave_event::accept and octave_event::reject. * octave-event.h (octave_event:handle_event): New function. (octave_event::accept, octave_event::reject): Delete.

--- a/libgui/src/main-window.cc
+++ b/libgui/src/main-window.cc
@@ -54,18 +54,20 @@
 }
 
 void
-main_window::event_accepted (octave_event *e)
+main_window::handle_event (octave_event *e, bool accept)
 {
-  if (dynamic_cast<octave_clear_history_event*> (e))
+  if (accept)
     {
-      // After clearing the history, we need to reset the model.
-      _history_dock_widget->reset_model ();
+      if (dynamic_cast<octave_clear_history_event*> (e))
+        {
+          // After clearing the history, we need to reset the model.
+          _history_dock_widget->reset_model ();
+        }
     }
-}
-
-void
-main_window::event_reject (octave_event *e)
-{
+  else
+    {
+      // octave_event::perform failed to process event.
+    }
 }
 
 void