additional reorganization of signal/slot connections in main_window class * main-window.cc (main_window::adopt_editor_widget): Set m_editor_menubar and m_active_editor and call m_editor_window->enable_menu_shortcuts here instead of in main_window constructor. (main_window::adopt_dock_widgets): Initialize m_previous_dock here instead of in main_window constructor. (main_window::adopt_file_browser_widget): Connect file browser signals to main window slots here instead of in main_window::construct. (main_window::adopt_editor_widget): Connect file_editor/main_window signals/slots here instead of in main_window::construct. Connect qt_link signals to file_editorhere instead of in main_window::construct_qt_link. (main_window::make_dock_widget_connections): Connect QApplication::aboutToQuit signal to dock widget save_settings slot here instead of in main_window::construct. * octave-qobject.cc (base_qobject::terminal_widget): Connect interpreter_output and update_prompt slots to qt_link signals here instead of in main_window::construct_qt_link. (base_qobject::file_browser_widget): Connect update_octave_directory slot to qt_link signal here instead of in main_window::construct_qt_link. * octave-qobject.h (base_qobject::have_terminal_window): New function. * qt-interpreter-events.cc (qt_interpreter_events::interpreter_output, qt_interpreter_events::display_exception): Use m_octave_qobj.have_terminal_window instead of gui_running to choose whether to emit signal or write directly to output stream.

--- a/libgui/src/octave-qobject.h	Mon Jun 21 15:34:29 2021 +0900
+++ b/libgui/src/octave-qobject.h	Mon Jun 21 14:51:13 2021 -0400
@@ -124,6 +124,11 @@
     // Provided for convenience.
     bool gui_running (void) const;
 
+    bool have_terminal_window (void) const
+    {
+      return ! m_terminal_widget.isNull ();
+    }
+
     resource_manager& get_resource_manager (void)
     {
       return m_resource_manager;