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, 5 insertions, 3 deletions

diff --git a/src/grail-gestures.c b/src/grail-gestures.c
index 5ab12a8..e1bf622 100644
--- a/src/grail-gestures.c
+++ b/src/grail-gestures.c
@@ -119,12 +119,14 @@ static int move_update(struct filter_model *m, float val)
         return m->active;
 }
 
-void gru_init_motion(struct grail *ge, const struct touch_dev_caps *caps)
+void gru_init_motion(struct grail *ge)
 {
         struct gesture_recognizer *gru = ge->gru;
         struct move_model *state = &gru->move;
-        float x = caps->info[TP_POS_X].maximum - caps->info[TP_POS_X].minimum;
-        float y = caps->info[TP_POS_Y].maximum - caps->info[TP_POS_Y].minimum;
+        struct grail_coord min, max;
+        grail_get_units(&min, &max, ge);
+        float x = max.x - min.x;
+        float y = max.y - min.y;
         float r = sqrt(x * x + y * y);
         state->x.fuzz = x / SN_MOVE;
         state->y.fuzz = y / SN_MOVE;