From 3928a3a0aadb4e0b3726536ae478e78367cc73b1 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Tue, 25 Feb 2025 11:43:55 -0700
Subject: [PATCH] prevent note-range change signals for every added note in a
 MidiView

---
 gtk2_ardour/midi_view.cc           |  2 ++
 gtk2_ardour/midi_view_background.h | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/gtk2_ardour/midi_view.cc b/gtk2_ardour/midi_view.cc
index 7e38905e4d..d4fa1be699 100644
--- a/gtk2_ardour/midi_view.cc
+++ b/gtk2_ardour/midi_view.cc
@@ -1076,6 +1076,8 @@ MidiView::model_changed()
 		return;
 	}
 
+	MidiViewBackground::NoteRangeSuspender nrs (_midi_context);
+
 	if (_active_notes) {
 		// Currently recording
 		const samplecnt_t zoom = _editing_context.get_current_zoom();
diff --git a/gtk2_ardour/midi_view_background.h b/gtk2_ardour/midi_view_background.h
index 57f093170c..b531219ecc 100644
--- a/gtk2_ardour/midi_view_background.h
+++ b/gtk2_ardour/midi_view_background.h
@@ -54,6 +54,19 @@ class MidiViewBackground : public virtual ViewBackground
 
 	Gtk::Adjustment note_range_adjustment;
 
+	struct NoteRangeSuspender {
+		NoteRangeSuspender (MidiViewBackground& mv) : mvb (mv) {
+			mvb.NoteRangeChanged.block ();
+		}
+
+		~NoteRangeSuspender() {
+			mvb.NoteRangeChanged.unblock ();
+			mvb.NoteRangeChanged(); /* EMIT SIGNAL */
+		}
+
+		MidiViewBackground& mvb;
+	};
+
 	enum VisibleNoteRange {
 		FullRange,
 		ContentsRange