From 2db8214aa37de3f4cfa2cdb648458cade38c8343 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 24 Mar 2025 08:41:45 -0600
Subject: [PATCH] clear previous region when switching to an empty slot in a
 cue-pianoroll

---
 gtk2_ardour/pianoroll.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gtk2_ardour/pianoroll.cc b/gtk2_ardour/pianoroll.cc
index 8a47f3a640..af87dcb9ca 100644
--- a/gtk2_ardour/pianoroll.cc
+++ b/gtk2_ardour/pianoroll.cc
@@ -2293,6 +2293,9 @@ Pianoroll::set (TriggerReference & tref)
 		if (mr) {
 			set_region (mr);
 		}
+
+	} else {
+		view->set_region (nullptr);
 	}
 }