X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fcontent_part.h;h=eb96b13710e210593ca47c8911225362d5bfb084;hp=4f6e9e396bbb70325505cfd7f7cce191ead95e3b;hb=f515b8daea9d28200be803bb64ff17e9f30343c4;hpb=a69d242f3f00207d6ea7320e6723775f4b0dbfb3

diff --git a/src/lib/content_part.h b/src/lib/content_part.h
index 4f6e9e396..eb96b1371 100644
--- a/src/lib/content_part.h
+++ b/src/lib/content_part.h
@@ -23,6 +23,7 @@
 #define DCPOMATIC_CONTENT_PART_H
 
 #include "content.h"
+#include "change_signaller.h"
 #include <boost/weak_ptr.hpp>
 #include <boost/thread/mutex.hpp>
 
@@ -41,28 +42,30 @@ protected:
 	void
 	maybe_set (T& member, T new_value, int property) const
 	{
+		ChangeSignaller<Content> cc (_parent, property);
 		{
 			boost::mutex::scoped_lock lm (_mutex);
 			if (member == new_value) {
+				cc.abort ();
 				return;
 			}
 			member = new_value;
 		}
-		_parent->signal_changed (property);
 	}
 
 	template <class T>
 	void
 	maybe_set (boost::optional<T>& member, T new_value, int property) const
 	{
+		ChangeSignaller<Content> cc (_parent, property);
 		{
 			boost::mutex::scoped_lock lm (_mutex);
 			if (member && member.get() == new_value) {
+				cc.abort ();
 				return;
 			}
 			member = new_value;
 		}
-		_parent->signal_changed (property);
 	}
 
 	Content* _parent;