From c713fd98dd684b2594f1fd600ca938aa0bbe66f9 Mon Sep 17 00:00:00 2001
From: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
Date: Sun, 16 Jan 2022 09:49:22 +0100
Subject: [PATCH] Fix horizontal scrolling direction on Linux

Closes https://github.com/emilk/egui/issues/356

Work-around until https://github.com/rust-windowing/winit/pull/2105 is merged and released
---
 eframe/CHANGELOG.md     | 1 +
 egui-winit/CHANGELOG.md | 1 +
 egui-winit/src/lib.rs   | 8 ++------
 3 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/eframe/CHANGELOG.md b/eframe/CHANGELOG.md
index f74e0dad..b704213e 100644
--- a/eframe/CHANGELOG.md
+++ b/eframe/CHANGELOG.md
@@ -8,6 +8,7 @@ NOTE: [`egui_web`](egui_web/CHANGELOG.md), [`egui-winit`](egui-winit/CHANGELOG.m
 * Removed `Frame::alloc_texture`. Use `egui::Context::load_texture` instead ([#1110](https://github.com/emilk/egui/pull/1110)).
 * The default native backend is now `egui_glow` (instead of `egui_glium`) ([#1020](https://github.com/emilk/egui/pull/1020)).
 * The default web painter is now `egui_glow` (instead of WebGL) ([#1020](https://github.com/emilk/egui/pull/1020)).
+* Fix horizontal scrolling direction on Linux.
 
 
 ## 0.16.0 - 2021-12-29
diff --git a/egui-winit/CHANGELOG.md b/egui-winit/CHANGELOG.md
index e2eb6621..d6d04c13 100644
--- a/egui-winit/CHANGELOG.md
+++ b/egui-winit/CHANGELOG.md
@@ -4,6 +4,7 @@ All notable changes to the `egui-winit` integration will be noted in this file.
 
 
 ## Unreleased
+* Fix horizontal scrolling direction on Linux.
 * Replaced `std::time::Instant` with `instant::Instant` for WebAssembly compatability ([#1023](https://github.com/emilk/egui/pull/1023))
 
 
diff --git a/egui-winit/src/lib.rs b/egui-winit/src/lib.rs
index b87bbdd2..0b91d1d5 100644
--- a/egui-winit/src/lib.rs
+++ b/egui-winit/src/lib.rs
@@ -453,12 +453,8 @@ impl State {
                 egui::vec2(delta.x as f32, delta.y as f32) / self.pixels_per_point()
             }
         };
-        if cfg!(target_os = "macos") {
-            delta.x *= -1.0; // until https://github.com/rust-windowing/winit/pull/2105 is merged and released
-        }
-        if cfg!(target_os = "windows") {
-            delta.x *= -1.0; // until https://github.com/rust-windowing/winit/pull/2101 is merged and released
-        }
+
+        delta.x *= -1.0; // Winit has inverted hscroll. Remove this line when we update winit after https://github.com/rust-windowing/winit/pull/2105 is merged and released
 
         if self.egui_input.modifiers.ctrl || self.egui_input.modifiers.command {
             // Treat as zoom instead: