From 30c591e813ef5befceac5e8cdafbf9aee502edc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20Rydg=C3=A5rd?= <hrydgard@gmail.com>
Date: Sun, 1 Jan 2023 22:23:14 +0100
Subject: [PATCH] Fix smooth touchpad scrolling on Windows

Forgot that I had half-implemented it but not finished it up..
---
 Common/UI/ViewGroup.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Common/UI/ViewGroup.cpp b/Common/UI/ViewGroup.cpp
index f8405fbb97dd..3288eedd1f3b 100644
--- a/Common/UI/ViewGroup.cpp
+++ b/Common/UI/ViewGroup.cpp
@@ -866,6 +866,11 @@ bool ScrollView::Key(const KeyInput &input) {
 	}
 
 	if (input.flags & KEY_DOWN) {
+		if ((input.keyCode == NKCODE_EXT_MOUSEWHEEL_UP || input.keyCode == NKCODE_EXT_MOUSEWHEEL_DOWN) &&
+			(input.flags & KEY_HASWHEELDELTA)) {
+			scrollSpeed = (float)(short)(input.flags >> 16) * 1.25f;  // Fudge factor
+		}
+
 		switch (input.keyCode) {
 		case NKCODE_EXT_MOUSEWHEEL_UP:
 			ScrollRelative(-scrollSpeed);