com.facebook.litho.widget

Interface LayoutInfo.ViewportFiller

All Known Implementing Classes:

LinearLayoutInfo.ViewportFiller

Enclosing interface:

LayoutInfo

public static interface LayoutInfo.ViewportFiller

Interface that is responsible for filling the viewport of the list with initial layouts according to the LayoutManager. The goal here is to have the layouts that the RecyclerView will ask for when it comes onto the screen already computed, e.g. in the background, so that we don't drop frames on the main thread. NB: This class should try to respect the layout of views as they will appear in the RecyclerView.

Method Summary

Modifier and Type	Method and Description
void	add(RenderInfo renderInfo, int width, int height) This will be called to inform implementations that the next layout has been computed.
int	getFill() Return the fill along the main axis (i.e.
boolean	wantsMore() Implementations should return true if they need more views to be computed in order to fill the screen.

Method Detail

wantsMore

boolean wantsMore()

Implementations should return true if they need more views to be computed in order to fill the screen.

add

void add(RenderInfo renderInfo,
         int width,
         int height)

This will be called to inform implementations that the next layout has been computed. Implementations should use the width/height to determine whether they still need more views to fill their initial viewport (which should be reflected in the next call to wantsMore()

getFill

int getFill()

Return the fill along the main axis (i.e. height for VERTICAL and width for HORIZONTAL), this method is available after add(RenderInfo, int, int) is called.