Ensure we update the active pointer id on pointer up/down.
Bug: 24841350
Change-Id: Id5d91ee8adbb638caf66976d701cfbc0befaca04
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
index 2e0b80a..be618e2 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
@@ -162,6 +162,14 @@
mVelocityTracker.addMovement(createMotionEventForStackScroll(ev));
break;
}
+ case MotionEvent.ACTION_POINTER_DOWN: {
+ final int index = ev.getActionIndex();
+ mActivePointerId = ev.getPointerId(index);
+ mLastMotionX = (int) ev.getX(index);
+ mLastMotionY = (int) ev.getY(index);
+ mLastP = mSv.mLayoutAlgorithm.screenYToCurveProgress(mLastMotionY);
+ break;
+ }
case MotionEvent.ACTION_MOVE: {
if (mActivePointerId == INACTIVE_POINTER_ID) break;
@@ -187,6 +195,20 @@
mLastP = mSv.mLayoutAlgorithm.screenYToCurveProgress(mLastMotionY);
break;
}
+ case MotionEvent.ACTION_POINTER_UP: {
+ int pointerIndex = ev.getActionIndex();
+ int pointerId = ev.getPointerId(pointerIndex);
+ if (pointerId == mActivePointerId) {
+ // Select a new active pointer id and reset the motion state
+ final int newPointerIndex = (pointerIndex == 0) ? 1 : 0;
+ mActivePointerId = ev.getPointerId(newPointerIndex);
+ mLastMotionX = (int) ev.getX(newPointerIndex);
+ mLastMotionY = (int) ev.getY(newPointerIndex);
+ mLastP = mSv.mLayoutAlgorithm.screenYToCurveProgress(mLastMotionY);
+ mVelocityTracker.clear();
+ }
+ break;
+ }
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP: {
// Animate the scroll back if we've cancelled
