fix save/restore of preferences torn-off-window state

gtk2_ardour/ardour_ui.cc

@@ -3574,6 +3574,11 @@ ARDOUR_UI::build_session (const std::string& path, const std::string& snap_name,
 		new_session->add_instant_xml (*n, false);
 	}
 
+	n = Config->instant_xml (X_("Preferences"));
+	if (n) {
+		new_session->add_instant_xml (*n, false);
+	}
+
 	/* Put the playhead at 0 and scroll fully left */
 	n = new_session->instant_xml (X_("Editor"));
 	if (n) {
@@ -4544,6 +4549,24 @@ ARDOUR_UI::export_video (bool range)
 	export_video_dialog->hide ();
 }
 
+XMLNode*
+ARDOUR_UI::preferences_settings () const
+{
+	XMLNode* node = 0;
+
+	if (_session) {
+		node = _session->instant_xml(X_("Preferences"));
+	} else {
+		node = Config->instant_xml(X_("Preferences"));
+	}
+
+	if (!node) {
+		node = new XMLNode (X_("Preferences"));
+	}
+
+	return node;
+}
+
 XMLNode*
 ARDOUR_UI::mixer_settings () const
 {

gtk2_ardour/ardour_ui.h

@@ -232,6 +232,7 @@ public:
 
 	XMLNode* main_window_settings() const;
 	XMLNode* editor_settings() const;
+	XMLNode* preferences_settings() const;
 	XMLNode* mixer_settings () const;
 	XMLNode* keyboard_settings () const;
 	XMLNode* tearoff_settings (const char*) const;

gtk2_ardour/ardour_ui_ed.cc

@@ -733,6 +733,7 @@ ARDOUR_UI::save_ardour_state ()
 	XMLNode& enode (editor->get_state());
 	XMLNode& mnode (mixer->get_state());
 	XMLNode& bnode (meterbridge->get_state());
+	XMLNode& pnode (rc_option_editor->get_state());
 
 	Config->add_extra_xml (*window_node);
 	Config->add_extra_xml (audio_midi_setup->get_state());
@@ -745,6 +746,7 @@ ARDOUR_UI::save_ardour_state ()
 		_session->add_instant_xml (main_window_node);
 		_session->add_instant_xml (enode);
 		_session->add_instant_xml (mnode);
+		_session->add_instant_xml (pnode);
 		_session->add_instant_xml (bnode);
 		if (location_ui) {
 			_session->add_instant_xml (location_ui->ui().get_state ());
@@ -753,12 +755,17 @@ ARDOUR_UI::save_ardour_state ()
 		Config->add_instant_xml (main_window_node);
 		Config->add_instant_xml (enode);
 		Config->add_instant_xml (mnode);
+		Config->add_instant_xml (pnode);
 		Config->add_instant_xml (bnode);
 		if (location_ui) {
 			Config->add_instant_xml (location_ui->ui().get_state ());
 		}
 	}
+
 	delete &enode;
+	delete &mnode;
+	delete &bnode;
+	delete &pnode;
 
 	Keyboard::save_keybindings ();
 }

gtk2_ardour/rc_option_editor.cc

@@ -1854,6 +1854,13 @@ RCOptionEditor::RCOptionEditor ()
         , _rc_config (Config)
 	, _mixer_strip_visibility ("mixer-element-visibility")
 {
+	XMLNode* node = ARDOUR_UI::instance()->preferences_settings();
+	if (node) {
+		/* gcc4 complains about ambiguity with Gtk::Widget::set_state
+		   (Gtk::StateType) here !!!
+		*/
+		Tabbable::set_state (*node, Stateful::loading_state_version);
+	}
 
 	UIConfiguration::instance().ParameterChanged.connect (sigc::mem_fun (*this, &RCOptionEditor::parameter_changed));
 
@@ -3482,3 +3489,11 @@ RCOptionEditor::use_own_window (bool and_fill_it)
 
 	return win;
 }
+
+XMLNode&
+RCOptionEditor::get_state ()
+{
+	XMLNode* node = new XMLNode (X_("Preferences"));
+	node->add_child_nocopy (Tabbable::get_state());
+	return *node;
+}

gtk2_ardour/rc_option_editor.h

@@ -42,6 +42,7 @@ public:
 	void populate_sync_options ();
 
 	Gtk::Window* use_own_window (bool and_fill_it);
+	XMLNode& get_state ();
 
 private:
 	void parameter_changed (std::string const &);