From 7da0eccccecfac5799f01d43347d2a58f8a1471e Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Wed, 14 May 2025 11:48:41 +0000
Subject: [PATCH] GHOST/SDL: support horizontal scroll events

---
 intern/ghost/intern/GHOST_SystemSDL.cc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/intern/ghost/intern/GHOST_SystemSDL.cc b/intern/ghost/intern/GHOST_SystemSDL.cc
index 021fdfda556..2e756fd738b 100644
--- a/intern/ghost/intern/GHOST_SystemSDL.cc
+++ b/intern/ghost/intern/GHOST_SystemSDL.cc
@@ -605,8 +605,14 @@ void GHOST_SystemSDL::processEvent(SDL_Event *sdl_event)
       GHOST_WindowSDL *window = findGhostWindow(
           SDL_GetWindowFromID_fallback(sdl_sub_evt.windowID));
       assert(window != nullptr);
-      g_event = new GHOST_EventWheel(
-          event_ms, window, GHOST_kEventWheelAxisVertical, sdl_sub_evt.y);
+      if (sdl_sub_evt.x != 0) {
+        g_event = new GHOST_EventWheel(
+            event_ms, window, GHOST_kEventWheelAxisHorizontal, sdl_sub_evt.x);
+      }
+      else if (sdl_sub_evt.y != 0) {
+        g_event = new GHOST_EventWheel(
+            event_ms, window, GHOST_kEventWheelAxisVertical, sdl_sub_evt.y);
+      }
       break;
     }
     case SDL_KEYDOWN: