Merge branch 'audiomsg_overhaul' (nonshared eventlists and more)

This introduces the following changes:
 - Clone Parts no more share their eventlist. Instead, all changes
   made to one clone are replicated to the other clones' eventlists
 - audio/song->msg{Add,Delete,Change}{Part,Event,Track} have been
   replaced by the corresponding UndoOp operations.
 - Enforcing of const-correctness: No GUI code may ever gain
   writable access to audio/midi/song data structures. Access
   must *always* go through applyOperationGroup. This is now
   enforced.
 - Removed a bunch of DELETETHIS or REMOVE or otherwise commented
   out code
 - Removed dead code
 - Removed unused Audio Messages (that should go through applyOpGroup
   anyway.)

1 files changed, 16 insertions, 1 deletions

diff --git a/muse2/muse/midievent.cpp b/muse2/muse/midievent.cpp
index 9fd47eaf..fb6517cd 100644
--- a/muse2/muse/midievent.cpp
+++ b/muse2/muse/midievent.cpp
@@ -41,11 +41,26 @@ MidiEventBase::MidiEventBase(EventType t)
       c = 0;
       }
 
+bool MidiEventBase::isSimilarTo(const EventBase& other_) const
+{
+	const MidiEventBase* other = dynamic_cast<const MidiEventBase*>(&other_);
+	if (other==NULL) // dynamic cast hsa failed: "other_" is not of type MidiEventBase.
+		return false;
+	
+	if ((a==other->a && b==other->b && c==other->c && edata.dataLen==other->edata.dataLen && this->PosLen::operator==(*other)) == false)
+		return false;
+	
+	if (edata.dataLen > 0)
+		return (memcmp(edata.data, other->edata.data, edata.dataLen) == 0);
+	else
+		return true; // no data equals no data.
+}
+
 //---------------------------------------------------------
 //   MidiEventBase::mid
 //---------------------------------------------------------
 
-EventBase* MidiEventBase::mid(unsigned b, unsigned e)
+EventBase* MidiEventBase::mid(unsigned b, unsigned e) const
       {
       if (tick() < b || tick() >= e)
             return 0;