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-rw-r--r--gtk2_ardour/editor.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 910df94c26..1c246a3f3b 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -43,6 +43,7 @@
#include "gtkmm2ext/dndtreeview.h"
#include "gtkmm2ext/stateful_button.h"
#include "gtkmm2ext/bindings.h"
+#include "gtkmm2ext/visibility_tracker.h"
#include "pbd/stateful.h"
#include "pbd/signals.h"
@@ -146,7 +147,7 @@ class ImageFrameSocketHandler ;
class TimeAxisViewItem ;
/* </CMT Additions> */
-class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARDOUR::SessionHandlePtr
+class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARDOUR::SessionHandlePtr, public Gtkmm2ext::VisibilityTracker
{
public:
Editor ();