From 9c276a8cdff0117fa0e6ca4b99d6775ac58e59fa Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Sat, 31 Oct 2026 13:49:24 +0000
Subject: [PATCH] Decompile fn_11436 (UIComboBoxID::Slot31)

Batch #8052 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_11436 UIComboBoxID::Slot31: logic confirmed by peer review

Peer-reviewed-by: ragnarok-clanker, secret, Tanke
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/UI/Buttons/UITextButton.cpp | 38 ++++++++++++++++++++++++++++++
 Source/UI/Lists/UIListBoxID.h      |  1 +
 2 files changed, 39 insertions(+)

diff --git a/Source/UI/Buttons/UITextButton.cpp b/Source/UI/Buttons/UITextButton.cpp
index defde439..3ab19324 100644
--- a/Source/UI/Buttons/UITextButton.cpp
+++ b/Source/UI/Buttons/UITextButton.cpp
@@ -2942,6 +2942,44 @@ void UIComboBox::Slot31(int x, int y) {
   g_windowMgr.CloseWindow(26);
 }
 
+// OFFSET: 0x00890C20
+// FUNCTION: fn_11436
+void UIComboBoxID::Slot31(int x, int y) {
+  int line = -1;
+
+  if (x >= 0 && y >= 0 && x < this->geometry.width && y < this->geometry.height) {
+    const int index = y / this->lineHeight + this->topLine;
+
+    if (index >= 0 && static_cast<unsigned>(index) < this->lines.size()) {
+      line = index;
+    }
+  }
+
+  this->selected = line;
+
+  if (UIWindow* target = g_windowMgr.LookupWindow(this->targetId)) {
+    int extra = 0;
+    const auto found = this->unknown_00C4.find(this->selected);
+
+    if (found != this->unknown_00C4.end()) {
+      extra = found->second;
+    }
+
+    target->SendMsg(nullptr, 39, this->lines[this->selected].id, extra, 0, 0);
+  } else if (this->parent) {
+    int extra = 0;
+    const auto found = this->unknown_00C4.find(this->selected);
+
+    if (found != this->unknown_00C4.end()) {
+      extra = found->second;
+    }
+
+    this->parent->SendMsg(nullptr, 39, this->lines[this->selected].id, extra, 0, 0);
+  }
+
+  g_windowMgr.CloseWindow(26);
+}
+
 // OFFSET: 0x00892990
 // FUNCTION: fn_11480
 void UIBasicSkillCtrl::Slot32(int x, int y) {
diff --git a/Source/UI/Lists/UIListBoxID.h b/Source/UI/Lists/UIListBoxID.h
index 7e4f6de4..52558d6e 100644
--- a/Source/UI/Lists/UIListBoxID.h
+++ b/Source/UI/Lists/UIListBoxID.h
@@ -56,6 +56,7 @@ public:
   void Slot25(int x, int y) override;
   void Slot26(int x, int y) override;
   void Slot27(int x, int y) override;
+  void Slot31(int x, int y) override;
   void Configure(int x, int y, int width, int height, unsigned char transparent) override;
   int SendMsg(UIWindow* sender, int message, std::intptr_t argument1, std::intptr_t argument2, std::intptr_t argument3, std::intptr_t argument4) override;
   void Refresh() override;