[gnome-settings-daemon] common: Add trackball test

[Bastien Nocera <hadess src gnome org>]

commit a2b3d26164ca1c90a1cd348a7e71b001b429df8a
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Oct 11 12:35:38 2012 +0200

    common: Add trackball test
    
    https://bugzilla.gnome.org/show_bug.cgi?id=685941

 plugins/common/test-input-helper.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/plugins/common/test-input-helper.c b/plugins/common/test-input-helper.c
index 4a9cccf..1871dbb 100644
--- a/plugins/common/test-input-helper.c
+++ b/plugins/common/test-input-helper.c
@@ -54,7 +54,7 @@ print_disabled_devices (void)
 int main (int argc, char **argv)
 {
 	gboolean supports_xinput;
-	gboolean has_touchpad, has_touchscreen;
+	gboolean has_touchpad, has_touchscreen, has_trackball;
         XDeviceInfo *device_info;
         gint n_devices, opcode;
         guint i;
@@ -82,6 +82,9 @@ int main (int argc, char **argv)
 	has_touchscreen = touchscreen_is_present ();
 	g_print ("Has touchscreen:\t\t\t%s\n", has_touchscreen ? "yes" : "no");
 
+	has_trackball = trackball_is_present ();
+	g_print ("Has trackball:\t\t\t\t%s\n", has_trackball ? "yes" : "no");
+
         device_info = XListInputDevices (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), &n_devices);
         if (device_info == NULL) {
 		g_warning ("Has no input devices");
@@ -97,6 +100,10 @@ int main (int argc, char **argv)
 			g_print ("Device %d is touchscreen:\t\t%s\n", (int) device_info[i].id, "yes");
 			continue;
 		}
+		if (device_info_is_trackball (&device_info[i])) {
+			g_print ("Device %d is trackball:\t\t\t%s\n", (int) device_info[i].id, "yes");
+			continue;
+		}
 
                 gdk_error_trap_push ();
                 device = XOpenDevice (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), device_info[i].id);