1 files changed, 14 insertions, 14 deletions

diff --git a/muse2/muse/steprec.cpp b/muse2/muse/steprec.cpp
index 723fe650..44da5a7e 100644
--- a/muse2/muse/steprec.cpp
+++ b/muse2/muse/steprec.cpp
@@ -55,7 +55,7 @@ void StepRec::timeout()
 	}
 }
 
-void StepRec::record(Part* part, int pitch, int len, int step, int velo, bool ctrl, bool shift, int incoming_pitch)
+void StepRec::record(const Part* part, int pitch, int len, int step, int velo, bool ctrl, bool shift, int incoming_pitch)
 {
 	unsigned tick = MusEGlobal::song->cpos();
 	unsigned lasttick=0;
@@ -76,12 +76,12 @@ void StepRec::record(Part* part, int pitch, int len, int step, int velo, bool ct
 		chord_timer->stop();
 
 		// extend len of last note?
-		EventList* events = part->events();
+		const EventList& events = part->events();
 		if (ctrl)
 		{
-			for (iEvent i = events->begin(); i != events->end(); ++i)
+			for (ciEvent i = events.begin(); i != events.end(); ++i)
 			{
-				Event ev = i->second;
+				const Event& ev = i->second;
 				if (ev.isNote() && ev.pitch() == pitch && ((ev.tick() + ev.lenTick() + part->tick()) == tick))
 				{
 					Event e = ev.clone();
@@ -106,13 +106,13 @@ void StepRec::record(Part* part, int pitch, int len, int step, int velo, bool ct
 			// if we would find a note after part->lenTick(), the above "if"
 			// avoids this. this has to be avoided because then part->hasHiddenEvents() is true
 			// which results in forbidding any action beyond its end
-			EventRange range = events->equal_range(tick - part->tick());
-			for (iEvent i = range.first; i != range.second; ++i)
+			EventRange range = events.equal_range(tick - part->tick());
+			for (ciEvent i = range.first; i != range.second; ++i)
 			{
-				Event ev = i->second;
+				const Event& ev = i->second;
 				if (ev.isNote() && ev.pitch() == pitch)
 				{
-					MusEGlobal::audio->msgDeleteEvent(ev, part, true, false, false);
+					MusEGlobal::song->applyOperation(UndoOp(UndoOp::DeleteEvent,ev, part, true,true));
 
 					if (!shift)
 					{
@@ -161,18 +161,18 @@ void StepRec::record(Part* part, int pitch, int len, int step, int velo, bool ct
 			// extend len of last note(s)
 			using std::set;
 			
-			set<Event*> extend_set;
-			EventList* events = part->events();
-			for (iEvent i = events->begin(); i != events->end(); ++i)
+			set<const Event*> extend_set;
+			const EventList& events = part->events();
+			for (ciEvent i = events.begin(); i != events.end(); ++i)
 			{
-				Event& ev = i->second;
+				const Event& ev = i->second;
 				if (ev.isNote() && note_held_down[ev.pitch()] && ((ev.tick() + ev.lenTick() + part->tick()) == tick))
 					extend_set.insert(&ev);
 			}
 			
-			for (set<Event*>::iterator it=extend_set.begin(); it!=extend_set.end(); it++)
+			for (set<const Event*>::iterator it=extend_set.begin(); it!=extend_set.end(); it++)
 			{
-				Event& ev=**it;
+				const Event& ev=**it;
 				Event e = ev.clone();
 				e.setLenTick(ev.lenTick() + len);
 				operations.push_back(UndoOp(UndoOp::ModifyEvent,e, ev, part, false, false));