From 8fee1950c6bce0e35eed1a7442eed04c9653e0f3 Mon Sep 17 00:00:00 2001
From: Glenn Watson <gw@intuitionlibrary.com>
Date: Mon, 27 Oct 2014 14:51:44 +1000
Subject: [PATCH] Add support for mouse wheel events on x11.

---
 src/x11/window/mod.rs | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/x11/window/mod.rs b/src/x11/window/mod.rs
index 99cbf9dc..a1cf0cc9 100644
--- a/src/x11/window/mod.rs
+++ b/src/x11/window/mod.rs
@@ -414,8 +414,8 @@ impl Window {
                 },
 
                 ffi::ButtonPress | ffi::ButtonRelease => {
-                    use {MouseInput, Pressed, Released};
-                    use {LeftMouseButton, RightMouseButton, MiddleMouseButton, OtherMouseButton};
+                    use {MouseInput, MouseWheel, Pressed, Released};
+                    use {LeftMouseButton, RightMouseButton, MiddleMouseButton};
                     let event: &ffi::XButtonEvent = unsafe { mem::transmute(&xev) };
 
                     let state = if xev.type_ == ffi::ButtonPress { Pressed } else { Released };
@@ -424,8 +424,14 @@ impl Window {
                         ffi::Button1 => Some(LeftMouseButton),
                         ffi::Button2 => Some(MiddleMouseButton),
                         ffi::Button3 => Some(RightMouseButton),
-                        ffi::Button4 => Some(OtherMouseButton(4)),
-                        ffi::Button5 => Some(OtherMouseButton(5)),
+                        ffi::Button4 => {
+                            events.push(MouseWheel(1));
+                            None
+                        }
+                        ffi::Button5 => {
+                            events.push(MouseWheel(-1));
+                            None
+                        }
                         _ => None
                     };