make event units public in the api

Add grail_get_units() to the api, so so that applications can
extract the min/max coordinates used in the gesture events.

Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/grail.h b/include/grail.h
index a100b36..0fa4473 100644
--- a/include/grail.h
+++ b/include/grail.h
@@ -88,4 +88,7 @@ int grail_idle(struct grail *ge, int fd, int ms);
 int grail_pull(struct grail *ge, int fd);
 void grail_close(struct grail *ge, int fd);
 
+void grail_get_units(struct grail_coord *min, struct grail_coord *max,
+                     const struct grail *ge);
+
 #endif