From 03795e3d912671b2c2f4cc460a46f5bbb033e4d6 Mon Sep 17 00:00:00 2001
From: Andrew Belt <andrewpbelt@gmail.com>
Date: Mon, 9 Oct 2017 07:59:23 -0400
Subject: [PATCH] Added momentary randomize() disable on ParamWidget

---
 include/app.hpp         | 4 ++++
 src/app/Knob.cpp        | 2 ++
 src/app/ParamWidget.cpp | 3 ++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/app.hpp b/include/app.hpp
index 29d4e18e..f96e5ac4 100644
--- a/include/app.hpp
+++ b/include/app.hpp
@@ -168,6 +168,10 @@ struct Light : TransparentWidget {
 struct ParamWidget : OpaqueWidget, QuantityWidget {
 	Module *module = NULL;
 	int paramId;
+	/** Used to momentarily disable value randomization
+	To permanently disable or change randomization behavior, override the randomize() method instead of changing this.
+	*/
+	bool randomizable = true;
 
 	json_t *toJson();
 	void fromJson(json_t *rootJ);
diff --git a/src/app/Knob.cpp b/src/app/Knob.cpp
index 52b45cb3..d8961c53 100644
--- a/src/app/Knob.cpp
+++ b/src/app/Knob.cpp
@@ -12,6 +12,7 @@ namespace rack {
 
 void Knob::onDragStart() {
 	guiCursorLock();
+	randomizable = false;
 }
 
 void Knob::onDragMove(Vec mouseRel) {
@@ -23,6 +24,7 @@ void Knob::onDragMove(Vec mouseRel) {
 
 void Knob::onDragEnd() {
 	guiCursorUnlock();
+	randomizable = true;
 }
 
 void Knob::onChange() {
diff --git a/src/app/ParamWidget.cpp b/src/app/ParamWidget.cpp
index bad76137..5ebe765b 100644
--- a/src/app/ParamWidget.cpp
+++ b/src/app/ParamWidget.cpp
@@ -15,7 +15,8 @@ void ParamWidget::fromJson(json_t *rootJ) {
 }
 
 void ParamWidget::randomize() {
-	setValue(rescalef(randomf(), 0.0, 1.0, minValue, maxValue));
+	if (randomizable)
+		setValue(rescalef(randomf(), 0.0, 1.0, minValue, maxValue));
 }
 
 void ParamWidget::onMouseDownOpaque(int button) {