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, 3 insertions, 3 deletions

diff --git a/quacker/boarddisplay.h b/quacker/boarddisplay.h
index c0acf2b..a14b269 100644
--- a/quacker/boarddisplay.h
+++ b/quacker/boarddisplay.h
@@ -44,10 +44,10 @@ public:
 	virtual ~BoardWithQuickEntry();
 
 public slots:
-	virtual void positionChanged(const Quackle::GamePosition &position);
+	virtual void positionChanged(const Quackle::GamePosition *position);
 
 protected slots:
-	void setLocalCandidate(const Quackle::Move &candidate);
+	void setLocalCandidate(const Quackle::Move *candidate);
 
 private slots:
 	void quickEditReturnPressed();
@@ -76,7 +76,7 @@ public:
 	TextBoard(QWidget *parent = 0);
 
 public slots:
-	virtual void positionChanged(const Quackle::GamePosition &position);
+	virtual void positionChanged(const Quackle::GamePosition *position);
 
 private:
 	QTextEdit *m_textEdit;