allow terminal window to be opened from command line * command-widget.h, command-widget.cc (command_widget::update_prompt): New slot. (command_widget::insert_interpreter_output): Now public. (command_widget::command_widget): Don't connect to signals from parent object here. * octave-qobject.h, octave-qobject.cc (base_qobject::m_terminal_widget): New data member. (base_qobject::terminal_widget): New function. Make (command_widget, QTerminal)/base_qobject signal/slot connections here instead of in main_window constructor. (base_qobject::show_terminal_window): New slot. (base_qobject::base_qobject): Connect qt_interpreter_events::show_terminal_window_signal to base_qobject::show_terminal_window slot. (base_qobject::~base_qobject): Close and delete terminal widget. * main-window.h, main-window.cc (main_window::main_window): Acquire m_command_window from base_qobject instead of constructing here. * terminal-dock-widget.cc (terminal_dock_widget::terminal_dock_widget): Make dock widget/terminal widget signal/slot connections here instead of in main window constructor. Call make_window if parent object is nullptr. * event-manager.h, event-manager.cc (F__event_manager_show_terminal_window__): New function. (interpreter_events::show_terminal_window): New virtual function. (event_manager::show_terminal_window): New function. * qt-interpreter-events.h, qt-interpreter-events.cc (qt_interpreter_events::show_terminal_window): New signal (qt_interpreter_events::show_terminal_window): New function.

--- a/libgui/src/qt-interpreter-events.h	Sat Jun 19 10:33:37 2021 -0400
+++ b/libgui/src/qt-interpreter-events.h	Sat Jun 19 14:34:07 2021 -0400
@@ -117,6 +117,8 @@
 
     void apply_preferences (void);
 
+    void show_terminal_window (void);
+
     bool show_documentation (const std::string& file);
 
     void show_file_browser (void);
@@ -263,6 +265,8 @@
 
     void gui_preference_signal (const QString& key, const QString& value);
 
+    void show_terminal_window_signal (void);
+
     void show_documentation_signal (const QString& file);
 
     void register_documentation_signal (const QString& file);