From cc026528ea21382f943ffa5c573c363decdb7bf2 Mon Sep 17 00:00:00 2001
From: altalk23 <45172705+altalk23@users.noreply.github.com>
Date: Tue, 26 Aug 2025 18:49:58 +0300
Subject: [PATCH] implement horizontal scrolling with trackpad to windows (and
 bring back macos)

---
 mod.json                          |  8 ++++
 src/features/FixMouseControls.cpp | 68 +++++++++++++++++++++++--------
 2 files changed, 58 insertions(+), 18 deletions(-)

diff --git a/mod.json b/mod.json
index 0afd25a..875218f 100644
--- a/mod.json
+++ b/mod.json
@@ -115,6 +115,14 @@
 			"platforms": ["desktop"],
 			"enable-if": "enable-fixed-mouse-controls"
 		},
+		"mouse-scroll-sensitivity": {
+			"type": "float",
+			"default": 32.0,
+			"name": "Mouse Scroll Sensitivity",
+			"description": "Controls the sensitivity of the mouse scroll input.",
+			"platforms": ["win"],
+			"enable-if": "enable-fixed-mouse-controls"
+		},
 		"pinch-to-zoom": {
 			"type": "bool",
 			"default": true,
diff --git a/src/features/FixMouseControls.cpp b/src/features/FixMouseControls.cpp
index 2989678..f9673b4 100644
--- a/src/features/FixMouseControls.cpp
+++ b/src/features/FixMouseControls.cpp
@@ -1,5 +1,6 @@
 
 #include <Geode/modify/EditorUI.hpp>
+#include <Geode/modify/CCEGLView.hpp>
 #include <Geode/loader/Mod.hpp>
 #include <Geode/binding/LevelEditorLayer.hpp>
 #include <Geode/utils/cocos.hpp>
@@ -13,6 +14,38 @@ using namespace geode::prelude;
 
 #ifdef GEODE_IS_DESKTOP
 
+#ifdef GEODE_IS_WINDOWS
+
+class $modify(MouseScrollWindowsFix, CCEGLView){
+    static void onModify(auto& self) {
+        // The static version inlines the actual callback, so i uninline it by hooking it
+        (void)Mod::get()->hook((void*)(base::getCocos() + 0x76390), &MouseScrollWindowsFix::onGLFWMouseScrollCallbackStatic, "onGLFWMouseScrollCallbackStatic");
+
+        (void)self.setHookPriority("cocos2d::CCEGLView::onGLFWMouseScrollCallback", Priority::Replace);
+    }
+
+    static MouseScrollWindowsFix* get() {
+        return static_cast<MouseScrollWindowsFix*>(CCEGLView::get());
+    }
+
+    // 
+    $override
+    void onGLFWMouseScrollCallback(GLFWwindow* window, double xpos, double ypos) {
+        if (!Mod::get()->getSettingValue<bool>("enable-fixed-mouse-controls")) {
+            return CCEGLView::onGLFWMouseScrollCallback(window, xpos, ypos);
+        }
+
+        auto sensitivity = Mod::get()->getSettingValue<double>("mouse-scroll-sensitivity");
+        CCDirector::get()->getMouseDispatcher()->dispatchScrollMSG(-ypos * sensitivity, xpos * sensitivity);
+	}
+
+    static void onGLFWMouseScrollCallbackStatic(GLFWwindow* window, double xpos, double ypos) {
+        MouseScrollWindowsFix::get()->CCEGLView::onGLFWMouseScrollCallback(window, xpos, ypos);
+    }
+};
+
+#endif
+
 class $modify(EditorUI) {
     $override
     virtual void scrollWheel(float y, float x) {
@@ -60,27 +93,26 @@ class $modify(EditorUI) {
         }
         // otherwise move screen
         else {
-            constexpr float mult = 2.f;
-
-            // move horizontally on shift
-            if (CCKeyboardDispatcher::get()->getShiftKeyPressed()) {
-                objLayer->setPositionX(
-                    objLayer->getPositionX() - y * mult
-                );
+            // move normally if x doesnt exist
+            if (std::fabs(x) < std::numeric_limits<float>::epsilon()) {
+                // move horizontally on shift
+                if (CCKeyboardDispatcher::get()->getShiftKeyPressed()) {
+                    objLayer->setPositionX(
+                        objLayer->getPositionX() - y
+                    );
+                }
+                // otherwise move as is in vanilla
+                else {
+                    objLayer->setPositionY(
+                        objLayer->getPositionY() + y
+                    );
+                }
             }
-            // otherwise move as is in vanilla
+            // use both axes, ignore shift
             else {
-                // add support for the horizontal trackpad scrolling on mac
-                // causes the editor to move sideways when scrolling on windows
-            #ifdef GEODE_IS_MACOS
-                objLayer->setPositionX(
-                    objLayer->getPositionX() + y * mult
-                );
-            #else
-                objLayer->setPositionY(
-                    objLayer->getPositionY() + y * mult
+                objLayer->setPosition(
+                    objLayer->getPosition() + ccp(x, y)
                 );
-            #endif
             }
 
             // call original but make it not do anything other than update