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msg{Add,Delete,Change}{Part,Event,Track} have been
   replaced by the corresponding UndoOp operations.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, 11 insertions, 2 deletions

diff --git a/muse2/muse/waveevent.cpp b/muse2/muse/waveevent.cpp
index 38ae10c6..24be2d01 100644
--- a/muse2/muse/waveevent.cpp
+++ b/muse2/muse/waveevent.cpp
@@ -53,16 +53,25 @@ WaveEventBase::WaveEventBase(EventType t)
 //   WaveEventBase::clone
 //---------------------------------------------------------
 
-EventBase* WaveEventBase::clone() 
+EventBase* WaveEventBase::clone() const
 { 
   return new WaveEventBase(*this); 
 }
 
+bool WaveEventBase::isSimilarTo(const EventBase& other_) const
+{
+	const WaveEventBase* other = dynamic_cast<const WaveEventBase*>(&other_);
+	if (other==NULL) // dynamic cast hsa failed: "other_" is not of type WaveEventBase.
+		return false;
+	
+	return f.dirPath()==other->f.dirPath() && _spos==other->_spos && this->PosLen::operator==(*other);
+}
+
 //---------------------------------------------------------
 //   WaveEvent::mid
 //---------------------------------------------------------
 
-EventBase* WaveEventBase::mid(unsigned b, unsigned e)
+EventBase* WaveEventBase::mid(unsigned b, unsigned e) const
       {
       WaveEventBase* ev = new WaveEventBase(*this);
       unsigned fr = frame();