Merge "Update the timeout values for accessibility gestures."

    // The minimal score for accepting a predicted gesture.

    private static final float MIN_PREDICTION_SCORE = 2.0f;

    // Distance a finger must travel before we decide if it is a gesture or not.

    private static final int GESTURE_CONFIRM_MM = 10;

    private static final long CANCEL_ON_PAUSE_THRESHOLD_STARTED_MS = 1000;

    private static final long CANCEL_ON_PAUSE_THRESHOLD_NOT_STARTED_MS = 500;

    // Time threshold used to determine if an interaction is a gesture or not.

    // If the first movement of 1cm takes longer than this value, we assume it's

    // a slow movement, and therefore not a gesture.

    //

    // This value was determined by measuring the time for the first 1cm

    // movement when gesturing, and touch exploring.  Based on user testing,

    // all gestures started with the initial movement taking less than 100ms.

    // When touch exploring, the first movement almost always takes longer than

    // 200ms.  From this data, 150ms seems the best value to decide what

    // kind of interaction it is.

    private static final long CANCEL_ON_PAUSE_THRESHOLD_NOT_STARTED_MS = 150;

    // Time threshold used to determine if a gesture should be cancelled.  If

    // the finger pauses for longer than this delay, the ongoing gesture is

    // cancelled.

    private static final long CANCEL_ON_PAUSE_THRESHOLD_STARTED_MS = 500;

    AccessibilityGestureDetector(Context context, Listener listener) {

        mListener = listener;