Copy Bank/Patch changes from auditioner to trigger-slot

This will need some refinement, we should only copy the settings
if the file in question was previously auditioned, and perhaps
only if GMsynth.lv2 is used.

gtk2_ardour/editor_audio_import.cc

@@ -67,6 +67,7 @@
 #include "interthread_progress_window.h"
 #include "mouse_cursors.h"
 #include "editor_cursors.h"
+#include "utils.h"
 
 #include "pbd/i18n.h"
 
@@ -1161,6 +1162,9 @@ Editor::finish_bringing_in_material (boost::shared_ptr<Region> region,
 			for (int s = 0; s < default_triggers_per_box; ++s) {
 				if (!existing_track->triggerbox ()->trigger (s)->region ()) {
 					existing_track->triggerbox ()->set_from_selection (s, copy);
+#if 1 /* assume drop from sidebar */
+					ARDOUR_UI_UTILS::copy_patch_changes (_session->the_auditioner (), existing_track->triggerbox ()->trigger (s));
+#endif
 					break;
 				}
 			}

gtk2_ardour/triggerbox_ui.cc

@@ -1022,6 +1022,9 @@ TriggerBoxUI::drag_data_received (Glib::RefPtr<Gdk::DragContext> const& context,
 		for (std::vector<std::string>::iterator s = paths.begin (); s != paths.end (); ++s) {
 			/* this will do nothing if n is too large */
 			_triggerbox.set_from_path (n, *s);
+#if 1 /* assume drop from sidebar -- TODO use a special data.get_target() ? */
+			ARDOUR_UI_UTILS::copy_patch_changes (_triggerbox.session().the_auditioner (), _triggerbox.trigger (n));
+#endif
 			++n;
 		}
 	}

gtk2_ardour/utils.cc

@@ -52,9 +52,11 @@
 #include "pbd/basename.h"
 #include "pbd/file_utils.h"
 
+#include "ardour/auditioner.h"
 #include "ardour/audioengine.h"
 #include "ardour/filesystem_paths.h"
 #include "ardour/search_paths.h"
+#include "ardour/triggerbox.h"
 
 #include "gtkmm2ext/colors.h"
 #include "gtkmm2ext/utils.h"
@@ -985,3 +987,20 @@ ARDOUR_UI_UTILS::convert_drop_to_paths (vector<string>& paths, const SelectionDa
 
 	return !paths.empty ();
 }
+
+void
+ARDOUR_UI_UTILS::copy_patch_changes (boost::shared_ptr<ARDOUR::Auditioner> a, boost::shared_ptr<ARDOUR::Trigger> t)
+{
+	boost::shared_ptr<ARDOUR::MIDITrigger> mt = boost::dynamic_pointer_cast <ARDOUR::MIDITrigger> (t);
+
+	if (!mt || !a) {
+		return;
+	}
+	for (uint8_t c = 0; c < 16; ++c) {
+		if (a->patch_change (c).is_set()) {
+			mt->set_patch_change (a->patch_change (c));
+		} else {
+			mt->unset_patch_change (c);
+		}
+	}
+}

gtk2_ardour/utils.h

@@ -42,6 +42,7 @@
 #include "canvas/types.h"
 
 namespace PBD {
+	class Controllable;
 	class Controllable;
 	class ScopedConnectionList;
 }
@@ -56,6 +57,11 @@ namespace ArdourCanvas {
 	class Item;
 }
 
+namespace ARDOUR {
+	class Auditioner;
+	class Trigger;
+}
+
 namespace ARDOUR_UI_UTILS {
 
 gint   just_hide_it (GdkEventAny*, Gtk::Window*);
@@ -112,6 +118,8 @@ bool running_from_source_tree ();
 
 void inhibit_screensaver (bool);
 
+void copy_patch_changes (boost::shared_ptr<ARDOUR::Auditioner>, boost::shared_ptr<ARDOUR::Trigger>);
+
 bool convert_drop_to_paths (std::vector<std::string>&, const Gtk::SelectionData&);
 
 } // namespace