From 099d033e04293e1f20758946da43723400e795aa Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Tue, 9 Sep 2025 13:33:02 +0200
Subject: [PATCH] set_pre_reaction for generic parameter

---
 config.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/config.cpp b/config.cpp
index ca629f5e..0d673077 100644
--- a/config.cpp
+++ b/config.cpp
@@ -117,6 +117,7 @@ struct parameter : public std::enable_shared_from_this<parameter> {
   parameter *set_sets(const reaction_t& s) { sets = s; return this; }
   parameter *set_extra(const reaction_t& r);
   parameter *set_reaction(const reaction_t& r);
+  parameter *set_pre_reaction(const reaction_t& r);
   virtual ~parameter() = default;
   virtual bool load_from_animation(const string& s) {
     load(s); return false;
@@ -130,6 +131,7 @@ struct parameter : public std::enable_shared_from_this<parameter> {
   virtual void set_cld_raw(cld x) { throw param_exception("parameter has no complex value", this); }
   virtual void set_cld(cld value) {
     auto bak = get_cld();
+    if(value != bak && pre_reaction) pre_reaction();
     set_cld_raw(value);
     if(value != bak && reaction) reaction();
     }
@@ -165,6 +167,10 @@ parameter *parameter::set_reaction(const reaction_t& r) {
   reaction = r; return this;
   }
 
+parameter *parameter::set_pre_reaction(const reaction_t& r) {
+  pre_reaction = r; return this;
+  }
+
 #if HDR
 using paramlist = map<string, std::shared_ptr<parameter>>;
 #endif