Add in time boundaries for recognition

50 ms:   Minimum time waiting for touch configuration to settle before
         flushing touch events to X. We don't want a two finger gesture
         triggering X events for the first finger before the second finger
         lands.

200 ms:  Maximum time for touches to begin a gesture. If no gesture is
         found within this time period, the events are flushed to X.

If after 50 ms there are no possible gestures for the number of active
touches, the events are immediately flushed to X.

If events are flushed to X, no more gesture recognition is possible until
all touches are lifted. Likewise, if any gesture is recognized, no events
may be flushed to X until all touches are lifted.

[rydberg@euromail.se: this patch is severely restrictive and not final]
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/grail-recognizer.h b/src/grail-recognizer.h
index 56e5b8d..b08ff34 100644
--- a/src/grail-recognizer.h
+++ b/src/grail-recognizer.h
@@ -25,6 +25,12 @@
 
 #include "grail-gestures.h"
 
+enum recognition_state {
+        RECOGNIZING,
+        RECOGNIZED,
+        UNRECOGNIZED
+};
+
 struct gesture_recognizer {
         struct move_model move;
         struct combo_model drag;
@@ -34,6 +40,8 @@ struct gesture_recognizer {
         struct combo_model winpinch;
         struct combo_model winrotate;
         struct tapping_model tapping;
+        utouch_frame_time_t start_time;
+        enum recognition_state state;
 };
 
 int gru_init(struct grail *ge);