Fix Qt6 MOC compilation on some platforms.

That was super painful.  It seems that some of the Quackle types that
have custom operator==() give fits to the MOC compiler when those
types are used as arguments for slots and/or signals (or maybe it's
only when they're connected in a certain way...frankly, I never did
figure this out precisely to my satisfaction).  The compilers provide
very little help in resolving this problem.

Once I understood the problem, VS22 was giving me just the tiniest
morsel, enough that I could hunt down the offending slot/signal
(it wasn't even giving me the name of the slot/signal...just the type
it was trying to use).  I've changed all offending functions to use
const pointers to types instead of const references, and this makes
Qt happy.

I couldn't find any info on the web directly about this, but here's
the closest I did find, which suggests that this is related to
increased functionality in Qt6 regarding reflection.

https://forum.qt.io/topic/141434/

This fixes my VC++22 x86-64 build.  Hopefully it fixes all of the
others, too.

1 files changed, 5 insertions, 5 deletions

diff --git a/quacker/view.h b/quacker/view.h
index eb2d1b5..ce72f82 100644
--- a/quacker/view.h
+++ b/quacker/view.h
@@ -59,8 +59,8 @@ signals:
 	// emit to alert the rest of the application to show this
 	// as candidate move - may eventually trigger positionChanged
 	// in response
-	void setCandidateMove(const Quackle::Move &move, bool *carryOnPtr = nullptr);
-	void removeCandidateMoves(const Quackle::MoveList &moves);
+	void setCandidateMove(const Quackle::Move *move, bool *carryOnPtr = nullptr);
+	void removeCandidateMoves(const Quackle::MoveList *moves);
 	void commit();
 
 	// emit to alert the rest of the application to reset the current
@@ -80,11 +80,11 @@ public slots:
 	// 
 	// The default implementation calls positionChanged(position) for all subviews
 	// in m_subviews.
-	virtual void positionChanged(const Quackle::GamePosition &position);
+	virtual void positionChanged(const Quackle::GamePosition *position);
 
 	// called when user starts a simulation and this move list should
 	// supercede that from the position
-	virtual void movesChanged(const Quackle::MoveList &moves);
+	virtual void movesChanged(const Quackle::MoveList *moves);
 
 	virtual void grabFocus();
 
@@ -107,7 +107,7 @@ signals:
 	// emit to alert the rest of the application to show this
 	// as candidate move - may eventually trigger positionChanged
 	// in response
-	void goToHistoryLocation(const Quackle::HistoryLocation &location);
+	void goToHistoryLocation(const Quackle::HistoryLocation *location);
 
 public slots:
 	// called whenever history is added to