Method Detail

• emitScrollEvent

   static <T extends ViewGroup, ReactScrollViewHelper.HasScrollEventThrottle> void emitScrollEvent(T scrollView, float xVelocity, float yVelocity)

  Shared by ReactScrollView and ReactHorizontalScrollView.

• emitScrollBeginDragEvent

   static <T extends ViewGroup, ReactScrollViewHelper.HasScrollEventThrottle> void emitScrollBeginDragEvent(T scrollView)

• emitScrollEndDragEvent

   static <T extends ViewGroup, ReactScrollViewHelper.HasScrollEventThrottle> void emitScrollEndDragEvent(T scrollView, float xVelocity, float yVelocity)

• emitScrollMomentumBeginEvent

   static <T extends ViewGroup, ReactScrollViewHelper.HasScrollEventThrottle> void emitScrollMomentumBeginEvent(T scrollView, int xVelocity, int yVelocity)

• emitScrollMomentumEndEvent

   static <T extends ViewGroup, ReactScrollViewHelper.HasScrollEventThrottle> void emitScrollMomentumEndEvent(T scrollView)

• emitLayoutEvent

   static void emitLayoutEvent(ViewGroup scrollView)

  This is only for Java listeners. onLayout events emitted to JS are handled elsewhere.

• parseOverScrollMode

   static int parseOverScrollMode(String jsOverScrollMode)

• parseSnapToAlignment

   static int parseSnapToAlignment(@Nullable() String alignment)

• getDefaultScrollAnimationDuration

   static int getDefaultScrollAnimationDuration(Context context)

• addScrollListener

   static void addScrollListener(ReactScrollViewHelper.ScrollListener listener)

  Adds a scroll listener.

  Note that you must keep a reference to this scroll listener because this class only keeps aweak reference to it (to prevent memory leaks). This means that code like addScrollListener(new ScrollListener() {...}) won't work, you need to do this instead:mScrollListener = new ScrollListener() {...};ReactScrollViewHelper.addScrollListener(mScrollListener); instead.

• removeScrollListener

   static void removeScrollListener(ReactScrollViewHelper.ScrollListener listener)

• smoothScrollTo

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> void smoothScrollTo(T scrollView, int x, int y)

  Scroll the given view to the location (x, y), with provided initial velocity. This method worksby calculate the "would be" initial velocity with internal friction to move to the point (x,y), then apply that to the animator.

• getNextFlingStartValue

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> int getNextFlingStartValue(T scrollView, int currentValue, int postAnimationValue, int velocity)

  Get current position or position after current animation finishes, if any.

• updateFabricScrollState

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> boolean updateFabricScrollState(T scrollView)

• updateFabricScrollState

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> boolean updateFabricScrollState(T scrollView, int scrollX, int scrollY)

  Called on any stabilized onScroll change to propagate content offset value to a Shadow Node.

• forceUpdateState

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> void forceUpdateState(T scrollView)

• updateStateOnScrollChanged

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator, ReactScrollViewHelper.HasScrollEventThrottle> void updateStateOnScrollChanged(T scrollView, float xVelocity, float yVelocity)

• registerFlingAnimator

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> void registerFlingAnimator(T scrollView)

• predictFinalScrollPosition

   static <T extends ViewGroup, FabricViewStateManager.HasFabricViewStateManager, ReactScrollViewHelper.HasScrollState, ReactScrollViewHelper.HasFlingAnimator> Point predictFinalScrollPosition(T scrollView, int velocityX, int velocityY, int maximumOffsetX, int maximumOffsetY)