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Commit ad0562ed authored by George Mount's avatar George Mount Committed by Automerger Merge Worker
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Merge "Fix overscroll doesn't affect scrolling when released" into sc-dev am:... 

Merge "Fix overscroll doesn't affect scrolling when released" into sc-dev am: ebde5e48 am: 95734a66

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14681840

Change-Id: I4c111019c4e29b4f97a5e08f3d4b324e229ae52c
parents ea0bafa4 95734a66

core/java/android/widget/AbsListView.java

+8 −9
Original line number Diff line number Diff line
@@ -3574,28 +3574,27 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te 
    private void scrollIfNeeded(int x, int y, MotionEvent vtev) {

        int rawDeltaY = y - mMotionY;

        int scrollOffsetCorrection = 0;

        int scrollConsumedCorrection = 0;

        if (mLastY == Integer.MIN_VALUE) {

            rawDeltaY -= mMotionCorrection;

        }

        if (dispatchNestedPreScroll(0, mLastY != Integer.MIN_VALUE ? mLastY - y : -rawDeltaY,

                mScrollConsumed, mScrollOffset)) {



        int incrementalDeltaY = mLastY != Integer.MIN_VALUE ? y - mLastY : rawDeltaY;



        // First allow releasing existing overscroll effect:

        incrementalDeltaY = releaseGlow(incrementalDeltaY, x);



        if (dispatchNestedPreScroll(0, -incrementalDeltaY, mScrollConsumed, mScrollOffset)) {

            rawDeltaY += mScrollConsumed[1];

            scrollOffsetCorrection = -mScrollOffset[1];

            scrollConsumedCorrection = mScrollConsumed[1];

            incrementalDeltaY += mScrollConsumed[1];

            if (vtev != null) {

                vtev.offsetLocation(0, mScrollOffset[1]);

                mNestedYOffset += mScrollOffset[1];

            }

        }

        final int deltaY = rawDeltaY;

        int incrementalDeltaY =

                mLastY != Integer.MIN_VALUE ? y - mLastY + scrollConsumedCorrection : deltaY;

        int lastYCorrection = 0;



        // First allow releasing existing overscroll effect:

        incrementalDeltaY = releaseGlow(incrementalDeltaY, x);



        if (mTouchMode == TOUCH_MODE_SCROLL) {

            if (PROFILE_SCROLLING) {

                if (!mScrollProfilingStarted) {

core/java/android/widget/EdgeEffect.java

+9 −2
Original line number Diff line number Diff line
@@ -342,6 +342,9 @@ public class EdgeEffect { 


        mGlowAlphaFinish = mGlowAlpha;

        mGlowScaleYFinish = mGlowScaleY;

        if (mEdgeEffectType == TYPE_STRETCH && mDistance == 0) {

            mState = STATE_IDLE;

        }

    }



    /**
@@ -739,8 +742,12 @@ public class EdgeEffect { 
    private boolean isAtEquilibrium() {

        double displacement = mDistance * mHeight; // in pixels

        double velocity = mVelocity;

        return Math.abs(velocity) < VELOCITY_THRESHOLD

                && Math.abs(displacement) < VALUE_THRESHOLD;



        // Don't allow displacement to drop below 0. We don't want it stretching the opposite

        // direction if it is flung that way. We also want to stop the animation as soon as

        // it gets very close to its destination.

        return displacement < 0 || (Math.abs(velocity) < VELOCITY_THRESHOLD

                && displacement < VALUE_THRESHOLD);

    }



    private float dampStretchVector(float normalizedVec) {