[mutter/document-button-values] Document button values in the RemoteDesktop api

[Matthias Clasen <matthiasc src gnome org>]

commit 320866c10be44973df64b45c050fab5bd3f052b1
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Apr 30 20:40:21 2021 -0400

    Document button values in the RemoteDesktop api
    
    I spent some time trying to pass X11 button values
    and was a bit miffed that it didn't work. So lets
    document the expected values to minimize future
    frustation.

 src/org.gnome.Mutter.RemoteDesktop.xml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/src/org.gnome.Mutter.RemoteDesktop.xml b/src/org.gnome.Mutter.RemoteDesktop.xml
index 7bae10e431..eac1cd9110 100644
--- a/src/org.gnome.Mutter.RemoteDesktop.xml
+++ b/src/org.gnome.Mutter.RemoteDesktop.xml
@@ -101,7 +101,12 @@
     <!--
        NotifyPointerButton:
 
-       A pointer button was pressed or released
+       A pointer button was pressed or released.
+
+        Accepted values for button are
+          0x110: Left button
+          0x111: Right button
+          0x112: Middle button
      -->
     <method name="NotifyPointerButton">
       <arg name="button" type="i" direction="in" />