From d02601e5c88d1d40e12cd71c2c10c7822919f7b8 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter@cs.unisa.edu.au>
Date: Thu, 20 Dec 2007 12:27:32 +1030
Subject: [PATCH] Register for DeviceClassesChangedEvents, reprint the list
 when we get one.

Only in list --loop mode though.
---
 src/list.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/list.c b/src/list.c
index 85b766d..e288642 100644
--- a/src/list.c
+++ b/src/list.c
@@ -23,6 +23,7 @@
 
 #include "xinput.h"
 #include <string.h>
+#include <X11/extensions/XIproto.h> /* for XI_Device***ChangedNotify */
 
 static void
 print_info(XDeviceInfo	*info, Bool shortformat)
@@ -128,7 +129,8 @@ list(Display	*display,
         if (daemon)
         {
             XiSelectEvent(display, DefaultRootWindow(display),
-                          XI_DeviceHierarchyChangedMask);
+                          XI_DeviceHierarchyChangedMask |
+                          XI_DeviceClassesChangedMask);
         }
 
         do {
@@ -141,7 +143,20 @@ list(Display	*display,
             while (daemon && !XNextEvent(display, &ev))
             {
                 if (ev.type == GenericEvent)
+                {
+                    XGenericEvent* gev = (XGenericEvent*)&ev;
+                    /* we just assume that extension is IReqCode, pretty save
+                       since we don't register for other events. */
+                    if (gev->evtype == XI_DeviceHierarchyChangedNotify)
+                    {
+                        printf("Hierarchy change.\n");
+                    } else if (gev->evtype == XI_DeviceClassesChangedNotify)
+                    {
+                        printf("Device classes changed.\n");
+                        free(((XDeviceClassesChangedEvent*)&ev)->inputclassinfo);
+                    }
                     break;
+                }
             }
         } while(daemon);
     } else {
-- 
2.56.0