From 08c6729ed1a132a184c0d152235d43e95b11d01f Mon Sep 17 00:00:00 2001
From: Robbert van der Helm <mail@robbertvanderhelm.nl>
Date: Wed, 11 Jan 2023 14:45:05 +0100
Subject: [PATCH] Also add an Editor::param_modulation_changed()

---
 nih_plug_egui/src/editor.rs  |  2 ++
 nih_plug_iced/src/editor.rs  |  4 ++++
 nih_plug_vizia/src/editor.rs |  5 +++++
 src/editor.rs                | 11 ++++++++---
 4 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/nih_plug_egui/src/editor.rs b/nih_plug_egui/src/editor.rs
index 4c5aa811..9647e606 100644
--- a/nih_plug_egui/src/editor.rs
+++ b/nih_plug_egui/src/editor.rs
@@ -107,6 +107,8 @@ where
         // that boolean is set.
     }
 
+    fn param_modulation_changed(&self, _id: &str, _modulation_offset: f32) {}
+
     fn param_values_changed(&self) {
         // Same
     }
diff --git a/nih_plug_iced/src/editor.rs b/nih_plug_iced/src/editor.rs
index e90d5c7e..249724e4 100644
--- a/nih_plug_iced/src/editor.rs
+++ b/nih_plug_iced/src/editor.rs
@@ -109,6 +109,10 @@ impl<E: IcedEditor> Editor for IcedEditorWrapper<E> {
         let _ = self.parameter_updates_sender.try_send(ParameterUpdate);
     }
 
+    fn param_modulation_changed(&self, _id: &str, _modulation_offset: f32) {
+        let _ = self.parameter_updates_sender.try_send(ParameterUpdate);
+    }
+
     fn param_values_changed(&self) {
         let _ = self.parameter_updates_sender.try_send(ParameterUpdate);
     }
diff --git a/nih_plug_vizia/src/editor.rs b/nih_plug_vizia/src/editor.rs
index 272cb6c7..75d8fb6d 100644
--- a/nih_plug_vizia/src/editor.rs
+++ b/nih_plug_vizia/src/editor.rs
@@ -131,6 +131,11 @@ impl Editor for ViziaEditor {
             .store(true, Ordering::Relaxed);
     }
 
+    fn param_modulation_changed(&self, _id: &str, _modulation_offset: f32) {
+        self.emit_parameters_changed_event
+            .store(true, Ordering::Relaxed);
+    }
+
     fn param_values_changed(&self) {
         self.emit_parameters_changed_event
             .store(true, Ordering::Relaxed);
diff --git a/src/editor.rs b/src/editor.rs
index 19ec556d..9ef87e18 100644
--- a/src/editor.rs
+++ b/src/editor.rs
@@ -58,9 +58,14 @@ pub trait Editor: Send {
     /// new value for a parameter or when a parameter change sent to the host gets processed.
     fn param_value_changed(&self, id: &str, normalized_value: f32);
 
-    /// Called whenever one or more parameter values changed while the editor is open. This may be
-    /// called in place of [`param_value_changed()`][Self::param_value_changed()] when multiple
-    /// parameter values hcange at the same time. For example, when a preset is loaded.
+    /// Called whenever a specific parameter's monophonic modulation value has changed while the
+    /// editor is open.
+    fn param_modulation_changed(&self, id: &str, modulation_offset: f32);
+
+    /// Called whenever one or more parameter values or modulations have changed while the editor is
+    /// open. This may be called in place of [`param_value_changed()`][Self::param_value_changed()]
+    /// when multiple parameter values hcange at the same time. For example, when a preset is
+    /// loaded.
     fn param_values_changed(&self);
 
     // TODO: Reconsider adding a tick function here for the Linux `IRunLoop`. To keep this platform