From e2cea5887657de7d230cbd708b14a342c659dfec Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 13 Nov 2025 17:08:04 -0700
Subject: [PATCH] in MidiView::view_changed(), don't update existing events
 unless zoom has changed

---
 gtk2_ardour/midi_view.cc | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/gtk2_ardour/midi_view.cc b/gtk2_ardour/midi_view.cc
index 4c97edc10a..f893b19e91 100644
--- a/gtk2_ardour/midi_view.cc
+++ b/gtk2_ardour/midi_view.cc
@@ -1323,9 +1323,12 @@ MidiView::view_changed()
 
 		EC_LOCAL_TEMPO_SCOPE_ARG (_editing_context);
 
-		for (auto & [ note, gui ] : _events) {
-			if (note->end_time() != std::numeric_limits<Temporal::Beats>::max()) {
-				update_note (gui);
+		const samplecnt_t zoom = _editing_context.get_current_zoom();
+		if (zoom != _last_display_zoom) {
+			for (auto & [ note, gui ] : _events) {
+				if (note->end_time() != std::numeric_limits<Temporal::Beats>::max()) {
+					update_note (gui);
+				}
 			}
 		}
 		return;