Fix visibility of automation tracks on reloading sessions.

git-svn-id: svn://localhost/ardour2/branches/3.0@4334 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/audio_time_axis.cc

@@ -85,8 +85,6 @@ AudioTimeAxisView::AudioTimeAxisView (PublicEditor& ed, Session& sess, boost::sh
 
 	_view = new AudioStreamView (*this);
 
-	create_automation_child (GainAutomation, false);
-
 	ignore_toggle = false;
 
 	mute_button->set_active (false);
@@ -102,13 +100,18 @@ AudioTimeAxisView::AudioTimeAxisView (PublicEditor& ed, Session& sess, boost::sh
 
 	set_state (*xml_node);
 
-	_route->panner().Changed.connect (bind (mem_fun(*this, &AudioTimeAxisView::update_pans), false));
+	/* if set_state above didn't create a gain automation child, we need to make one */
+	if (automation_track (GainAutomation) == 0) {
+		create_automation_child (GainAutomation, false);
+	}
+	
+	_route->panner().Changed.connect (bind (mem_fun(*this, &AudioTimeAxisView::ensure_pan_views), false));
 
 	/* map current state of the route */
 
 	processors_changed ();
 	reset_processor_automation_curves ();
-	update_pans (false);
+	ensure_pan_views (false);
 	update_control_names ();
 
 	if (is_audio_track()) {
@@ -342,20 +345,24 @@ AudioTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool
 	} else if (param.type() == PanAutomation) {
 
 		ensure_xml_node ();
-		update_pans (show);
+		ensure_pan_views (show);
 
 	} else {
 		error << "AudioTimeAxisView: unknown automation child " << EventTypeMap::instance().to_symbol(param) << endmsg;
 	}
 }
 
+/** Ensure that we have the appropriate AutomationTimeAxisViews for the
+ *  panners that we have.
+ *
+ *  @param show true to show any new views that we create, otherwise false.
+ */
 void
-AudioTimeAxisView::update_pans (bool show)
+AudioTimeAxisView::ensure_pan_views (bool show)
 {
 	const set<Evoral::Parameter>& params = _route->panner().what_can_be_automated();
 	set<Evoral::Parameter>::iterator p;
 
-	uint32_t i = 0;
 	for (p = params.begin(); p != params.end(); ++p) {
 		boost::shared_ptr<ARDOUR::AutomationControl> pan_control
 			= boost::dynamic_pointer_cast<ARDOUR::AutomationControl>(
@@ -366,15 +373,25 @@ AudioTimeAxisView::update_pans (bool show)
 			continue;
 		}
 
-		boost::shared_ptr<AutomationTimeAxisView> pan_track(new AutomationTimeAxisView (_session,
+		if (automation_child (pan_control->parameter ()).get () == 0) {
+
+			/* we don't already have an AutomationTimeAxisView for this parameter */
+
+			std::string const name = _route->describe_parameter (pan_control->parameter ());
+
+			boost::shared_ptr<AutomationTimeAxisView> pan_track (
+				new AutomationTimeAxisView (_session,
 							    _route, _route, pan_control, 
 							    editor,
 							    *this,
 							    false,
 							    parent_canvas,
-					_route->describe_parameter(pan_control->parameter())));
+							    name)
-		add_automation_child(*p, pan_track, show);
+				
-		++i;
+				);
+			
+			add_automation_child (*p, pan_track, show);
+		}
 	}
 }
 #if 0

gtk2_ardour/audio_time_axis.h

@@ -110,7 +110,7 @@ class AudioTimeAxisView : public RouteTimeAxisView
 	void gain_hidden ();
 	void pan_hidden ();
 
-	void update_pans (bool show=true);
+	void ensure_pan_views (bool show = true);
 	void update_control_names ();
 
 	Gtk::CheckMenuItem* waveform_item;

gtk2_ardour/automation_time_axis.cc

@@ -49,6 +49,7 @@ Pango::FontDescription* AutomationTimeAxisView::name_font = 0;
 bool AutomationTimeAxisView::have_name_font = false;
 const string AutomationTimeAxisView::state_node_name = "AutomationChild";
 
+
 /** \a a the automatable object this time axis is to display data for.
  * For route/track automation (e.g. gain) pass the route for both \r and \a.
  * For route child (e.g. plugin) automation, pass the child for \a.
@@ -863,30 +864,18 @@ AutomationTimeAxisView::set_state (const XMLNode& node)
 {
 	TimeAxisView::set_state (node);
 
-	XMLNodeList kids;
+	XMLProperty const * type = node.property ("automation-id");
-	XMLNodeConstIterator iter;
+	if (type && type->value () == ARDOUR::EventTypeMap::instance().to_symbol (_control->parameter())) {
-
+		XMLProperty const * shown = node.property ("shown");
-	kids = node.children ();
+		if (shown && shown->value () == "yes") {
-
+			set_marked_for_display (true);
-	for (iter = kids.begin(); iter != kids.end(); ++iter) {
+			canvas_display->show (); /* FIXME: necessary? show_at? */
-		
-		if ((*iter)->name() == state_node_name) {
-			XMLProperty* type = (*iter)->property("automation-id");
-
-			if (type && type->value() == ARDOUR::EventTypeMap::instance().to_symbol(_control->parameter())) {
-				XMLProperty *shown = (*iter)->property("shown-editor");
-
-				if (shown && shown->value() == "yes") {
-					set_marked_for_display(true);
-					canvas_display->show(); /* FIXME: necessary? show_at? */
-				}
-				break;
-			}
 		}
 	}
 	
-	if (!_marked_for_display)
+	if (!_marked_for_display) {
 		hide();
+	}
 
 	return 0;
 }

gtk2_ardour/route_time_axis.cc

@@ -426,6 +426,7 @@ RouteTimeAxisView::set_state (const XMLNode& node)
 	for (iter = kids.begin(); iter != kids.end(); ++iter) {
 		if ((*iter)->name() == AutomationTimeAxisView::state_node_name) {
 			if ((prop = (*iter)->property ("automation-id")) != 0) {
+
 				Evoral::Parameter param = ARDOUR::EventTypeMap::instance().new_parameter(prop->value());
 				bool show = ((prop = (*iter)->property ("shown")) != 0) && prop->value() == "yes";
 				create_automation_child(param, show);
@@ -434,6 +435,7 @@ RouteTimeAxisView::set_state (const XMLNode& node)
 			}
 		}
 	}
+
 	return 0;
 }
 
@@ -1249,25 +1251,26 @@ RouteTimeAxisView::show_automation(Evoral::Parameter param)
 	return (_show_automation.find(param) != _show_automation.end());
 }
 
-/** Retuns NULL if track for \a param doesn't exist.
+/** Retuns 0 if track for \a param doesn't exist.
  */
 RouteTimeAxisView::RouteAutomationNode*
-RouteTimeAxisView::automation_track(Evoral::Parameter param)
+RouteTimeAxisView::automation_track (Evoral::Parameter param)
 {
-	map<Evoral::Parameter, RouteAutomationNode*>::iterator i = _automation_tracks.find(param);
+	map<Evoral::Parameter, RouteAutomationNode*>::iterator i = _automation_tracks.find (param);
 
-	if (i != _automation_tracks.end())
+	if (i != _automation_tracks.end()) {
 		return i->second;
-	else
+	} else {
-		return NULL;
+		return 0;
+	}
 }
 
 /** Shorthand for GainAutomation, etc.
  */	
 RouteTimeAxisView::RouteAutomationNode*
-RouteTimeAxisView::automation_track(AutomationType type)
+RouteTimeAxisView::automation_track (AutomationType type)
 {
-	return automation_track(Evoral::Parameter(type));
+	return automation_track (Evoral::Parameter(type));
 }
 
 RouteGroup*