device: Add a num-touches property

Some backends can provide this information for touch devices,
and it can be useful to have, so add this property.

1 files changed, 1 insertions, 0 deletions

diff --git a/gdk/gdkdeviceprivate.h b/gdk/gdkdeviceprivate.h
index 7675895eb8..2350d02886 100644
--- a/gdk/gdkdeviceprivate.h
+++ b/gdk/gdkdeviceprivate.h
@@ -57,6 +57,7 @@ struct _GdkDevice
   GList *slaves;
   GdkDeviceType type;
   GArray *axes;
+  guint num_touches;
 
   gchar *vendor_id;
   gchar *product_id;