Disable motion with resting thumbs

Disable motion gestures whenever one of the pointing fingers is a
thumb. Movement is skipped rather than held, minimizing unpredictable
movement after thumb release.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gestures.c b/src/gestures.c
index b6c3bf4..d061f93 100644
--- a/src/gestures.c
+++ b/src/gestures.c
@@ -25,6 +25,7 @@
 
 #include "gestures.h"
 
+static const int FINGER_THUMB_MS = 400;
 /**
  * extract_buttons
  *
@@ -83,11 +84,19 @@ static void extract_movement(struct Gestures *gs, struct MTouch* mt)
         ymove /= nmove;
 
         if (nmove == 1) {
+                if (mt->mem.moving & mt->mem.thumb) {
+                        mt_skip_movement(mt, FINGER_THUMB_MS);
+                        return;
+                }
                 gs->dx = xmove;
                 gs->dy = ymove;
                 if (gs->dx || gs->dy)
                         SETBIT(gs->type, GS_MOVE);
         } else {
+                if (mt->mem.moving & mt->mem.thumb) {
+                        mt_skip_movement(mt, FINGER_THUMB_MS);
+                        return;
+                }
                 gs->dx = xmove;
                 gs->dy = ymove;
                 if (abs(gs->dx) > abs(gs->dy)) {