react-spring#useSprings TypeScript Examples

The following examples show how to use react-spring#useSprings. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: array-supercontrol.tsx    From utopia with MIT License 5 votes vote down vote up 
export function useArraySuperControl<T>(
  values: ReadonlyArray<T>,
  onSubmitValue: (newValue: ReadonlyArray<T>, transient?: boolean | undefined) => void,
  rowHeight: number,
  reversed: boolean = false,
) {
  const localDraggingIndex = React.useRef(values.map((_, index) => index))

  const [springs, setSprings] = useSprings(
    values.length,
    getStyleForArrayDragItem(localDraggingIndex.current, reversed, rowHeight),
    [values],
  )

  React.useEffect(() => {
    localDraggingIndex.current = values.map((_, index) => index)
    setSprings(getStyleForArrayDragItem(localDraggingIndex.current, reversed, rowHeight))
  }, [values, setSprings, reversed, rowHeight])

  const bind = useDrag(({ args: [currentlyDraggingOriginalIndex], down, movement: [, y] }) => {
    const currentlyDraggingTemporaryIndex = localDraggingIndex.current.indexOf(
      currentlyDraggingOriginalIndex,
    )
    const newCurrentlyDraggingTemporaryIndex = clamp(
      Math.round((currentlyDraggingOriginalIndex * rowHeight + (reversed ? -y : y)) / rowHeight),
      0,
      values.length - 1,
    )
    localDraggingIndex.current = move(
      currentlyDraggingTemporaryIndex,
      newCurrentlyDraggingTemporaryIndex,
      localDraggingIndex.current,
    )
    setSprings(
      getStyleForArrayDragItem(localDraggingIndex.current, reversed, rowHeight, down, {
        currentlyDraggingOriginalIndex: currentlyDraggingOriginalIndex as number,
        currentlyDraggingTemporaryIndex,
        y,
      }),
    )
    // Ensure to only change the ordering if it has actually changed.
    if (!down && currentlyDraggingOriginalIndex !== newCurrentlyDraggingTemporaryIndex) {
      const newValue = move(
        currentlyDraggingOriginalIndex as number,
        newCurrentlyDraggingTemporaryIndex,
        [...values],
      )
      onSubmitValue(newValue)
    }
  })
  return {
    bind,
    springs,
  }
}