[automerger] Adding overscroll effect in recents list am: 4d6b1a95a1 (ce2c4a83) · Commits · e / os / android_packages_apps_Trebuchet

quickstep/src/com/android/quickstep/views/RecentsView.java

+2 −1

Original line number	Diff line number	Diff line
		@@ -259,7 +259,8 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
		public RecentsView(Context context, AttributeSet attrs, int defStyleAttr) {
		super(context, attrs, defStyleAttr);
		setPageSpacing(getResources().getDimensionPixelSize(R.dimen.recents_page_spacing));
		enableFreeScroll(true);
		setEnableFreeScroll(true);
		setEnableOverscroll(true);
		setClipToOutline(true);

		mFastFlingVelocity = getResources()

src/com/android/launcher3/LauncherScroller.java

+2 −2

Original line number	Diff line number	Diff line
		@@ -459,13 +459,13 @@ public class LauncherScroller {
		return Math.log(INFLEXION * Math.abs(velocity) / (mFlingFriction * mPhysicalCoeff));
		}

		private int getSplineFlingDuration(float velocity) {
		public int getSplineFlingDuration(float velocity) {
		final double l = getSplineDeceleration(velocity);
		final double decelMinusOne = DECELERATION_RATE - 1.0;
		return (int) (1000.0 * Math.exp(l / decelMinusOne));
		}

		private double getSplineFlingDistance(float velocity) {
		public double getSplineFlingDistance(float velocity) {
		final double l = getSplineDeceleration(velocity);
		final double decelMinusOne = DECELERATION_RATE - 1.0;
		return mFlingFriction * mPhysicalCoeff * Math.exp(DECELERATION_RATE / decelMinusOne * l);

src/com/android/launcher3/PagedView.java

+9 −57

Original line number	Diff line number	Diff line
		@@ -63,7 +63,6 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
		protected static final ComputePageScrollsLogic SIMPLE_SCROLL_LOGIC = (v) -> v.getVisibility() != GONE;

		public static final int PAGE_SNAP_ANIMATION_DURATION = 750;
		public static final int SLOW_PAGE_SNAP_ANIMATION_DURATION = 950;

		// OverScroll constants
		private final static int OVERSCROLL_PAGE_SNAP_ANIMATION_DURATION = 270;
		@@ -83,7 +82,6 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
		public static final int INVALID_RESTORE_PAGE = -1001;

		private boolean mFreeScroll = false;
		private boolean mSettleOnPageInFreeScroll = false;

		protected int mFlingThresholdVelocity;
		protected int mMinFlingVelocity;
		@@ -356,17 +354,6 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou

		@Override
		public void scrollTo(int x, int y) {
		// In free scroll mode, we clamp the scrollX
		if (mFreeScroll) {
		// If the scroller is trying to move to a location beyond the maximum allowed
		// in the free scroll mode, we make sure to end the scroll operation.
		if (!mScroller.isFinished() && (x > mMaxScrollX \|\| x < 0)) {
		forceFinishScroller(false);
		}

		x = Utilities.boundToRange(x, 0, mMaxScrollX);
		}

		mUnboundedScrollX = x;

		boolean isXBeforeFirstPage = mIsRtl ? (x > mMaxScrollX) : (x < 0);
		@@ -1026,13 +1013,7 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
		dampedOverScroll(amount);
		}


		protected void enableFreeScroll(boolean settleOnPageInFreeScroll) {
		setEnableFreeScroll(true);
		mSettleOnPageInFreeScroll = settleOnPageInFreeScroll;
		}

		private void setEnableFreeScroll(boolean freeScroll) {
		protected void setEnableFreeScroll(boolean freeScroll) {
		boolean wasFreeScroll = mFreeScroll;
		mFreeScroll = freeScroll;

		@@ -1041,8 +1022,6 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
		} else if (wasFreeScroll) {
		snapToPage(getNextPage());
		}

		setEnableOverscroll(!freeScroll);
		}

		protected void setEnableOverscroll(boolean enable) {
		@@ -1155,42 +1134,15 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
		snapToDestination();
		}
		} else {
		if (!mScroller.isFinished()) {
		abortScrollerAnimation(true);
		}

		float scaleX = getScaleX();
		int vX = (int) (-velocityX * scaleX);
		int initialScrollX = (int) (getScrollX() * scaleX);

		mScroller.setInterpolator(mDefaultInterpolator);
		mScroller.fling(initialScrollX,
		getScrollY(), vX, 0, Integer.MIN_VALUE, Integer.MAX_VALUE, 0, 0);
		int unscaledScrollX = (int) (mScroller.getFinalX() / scaleX);
		mNextPage = getPageNearestToCenterOfScreen(unscaledScrollX);
		int firstPageScroll = getScrollForPage(!mIsRtl ? 0 : getPageCount() - 1);
		int lastPageScroll = getScrollForPage(!mIsRtl ? getPageCount() - 1 : 0);
		if (mSettleOnPageInFreeScroll && unscaledScrollX > 0
		&& unscaledScrollX < mMaxScrollX) {
		// If scrolling ends in the half of the added space that is closer to the
		// end, settle to the end. Otherwise snap to the nearest page.
		// If flinging past one of the ends, don't change the velocity as it will
		// get stopped at the end anyway.
		final int finalX = unscaledScrollX < firstPageScroll / 2 ?
		0 :
		unscaledScrollX > (lastPageScroll + mMaxScrollX) / 2 ?
		mMaxScrollX :
		getScrollForPage(mNextPage);

		mScroller.setFinalX((int) (finalX * getScaleX()));
		// Ensure the scroll/snap doesn't happen too fast;
		int extraScrollDuration = OVERSCROLL_PAGE_SNAP_ANIMATION_DURATION
		- mScroller.getDuration();
		if (extraScrollDuration > 0) {
		mScroller.extendDuration(extraScrollDuration);
		}
		int unscaledScrollX = getScrollX() - (int) Math.round(
		mScroller.getSplineFlingDistance(velocityX) * Math.signum(velocityX));
		int duration = mScroller.getSplineFlingDuration(velocityX);
		int finalPage = getPageNearestToCenterOfScreen(unscaledScrollX);
		if ((isFling \|\| isSignificantMove) && (finalPage != mCurrentPage)) {
		snapToPage(finalPage, duration);
		} else {
		snapToDestination();
		}
		invalidate();
		}
		onScrollInteractionEnd();
		} else if (mTouchState == TOUCH_STATE_PREV_PAGE) {