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Update the timeout values for accessibility gestures.

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Change-Id: I1e6ed7bbec46b848c1278922be3110733a64dcb6
(cherry picked from commit 0522205fd5)
This commit is contained in:
Zachary Kuznia
2016-02-11 14:15:06 -08:00
committed by Zach Kuznia
parent e4f490cc69
commit c8e941f4ba
1 changed files with 18 additions and 2 deletions
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20
services/accessibility/java/com/android/server/accessibility/AccessibilityGestureDetector.java
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@@ -110,9 +110,25 @@ class AccessibilityGestureDetector extends GestureDetector.SimpleOnGestureListen
// 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;