From 7dc588c4d377dbfe54061f35dc67f35cefac9c03 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Sat, 9 Apr 2016 17:35:58 -0400
Subject: [PATCH] Add a note about GDK_AXIS_X/Y

These axes mmay or may not be present, best to ignore them.
---
 gdk/gdktypes.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gdk/gdktypes.h b/gdk/gdktypes.h
index 690cc499e1..7c4a2bb008 100644
--- a/gdk/gdktypes.h
+++ b/gdk/gdktypes.h
@@ -546,6 +546,10 @@ typedef enum
  * An enumeration describing the way in which a device
  * axis (valuator) maps onto the predefined valuator
  * types that GTK+ understands.
+ *
+ * Note that the X and Y axes are not really needed; pointer devices
+ * report their location via the x/y members of events regardless. Whether
+ * X and Y are present as axes depends on the GDK backend.
  */
 typedef enum
 {
-- 
2.30.2