itk-viewer-material-ui/src/Images/VolumeRenderingInputs.jsx

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import React, { useEffect, useRef } from 'react'
import { useActor } from '@xstate/react'
import BlendModeSelector from './BlendModeSelector'
import GradientOpacitySlider from './GradientOpacitySlider'
import SampleDistanceSlider from './SampleDistanceSlider'
import ShadowToggle from './ShadowToggle'
import '../style.css'

function VolumeRenderingInputs(props) {
  const { service } = props
  const [state] = useActor(service)
  const volumeRow1 = useRef(null)
  const volumeRow2 = useRef(null)
  const name = state.context.images.selectedName
  const actorContext = state.context.images.actorContext.get(name)

  useEffect(() => {
    state.context.images.volumeRow1 = volumeRow1.current
    state.context.images.volumeRow2 = volumeRow2.current
  }, [])

  return !state.context.use2D ? (
    <div>
      <div
        ref={volumeRow1}
        className={`uiRow ${
          actorContext.blendMode !== 'Composite' && 'hidden'
        }`}
        style={{ whiteSpace: 'nowrap' }}
      >
        <ShadowToggle {...props} />
        <GradientOpacitySlider {...props} />
      </div>
      <div ref={volumeRow2} className="uiRow">
        <SampleDistanceSlider {...props} />
        <BlendModeSelector {...props} />
      </div>
    </div>
  ) : (
    <div />
  )
}

export default VolumeRenderingInputs