com.facebook.rendercore.extensions

Interface LayoutResultVisitor<State>

Type Parameters:

State - The state represents the data collected by the visitor for a layout pass.

All Known Implementing Classes:

IncrementalMountRenderCoreExtension.Visitor, VisibilityExtension.Visitor

public interface LayoutResultVisitor<State>

The LayoutResultVisitor API is used by RenderCore to allow a RenderCoreExtension to visit every LayoutResult during every layout pass. The visitor can collect any data that it is interested in from every LayoutResult. A LayoutResultVisitor must not mutate its RenderCoreExtension; it should be functional. Consequently, a LayoutResultVisitor should only be used for one layout pass.

Method Summary

Modifier and Type	Method and Description
void	visit(RenderTreeNode parent, LayoutResult result, Rect bounds, int x, int y, int position, State state) This API is called for every LayoutResult during a layout pass.

Method Detail

visit

void visit(RenderTreeNode parent,
           LayoutResult result,
           Rect bounds,
           int x,
           int y,
           int position,
           State state)

This API is called for every LayoutResult during a layout pass.

Parameters:

parent - The parent RenderTreeNode.

result - The LayoutResult being visited.

bounds - The bounds of this LayoutResult relative to its parent.

x - The absolute x position.

y - The absolute y position.

position - The position of the layout result.

state - The state the visitor can write to.