itk-viewer-material-ui/src/Main/ScreenshotButton.jsx

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import React, { useEffect, useRef } from 'react'
import { useActor } from '@xstate/react'
import { Icon, IconButton, Tooltip } from '@mui/material'
import { screenshotIconDataUri } from 'itk-viewer-icons'

function ScreenshotButton(props) {
  const { service } = props
  const screenshotButton = useRef(null)
  const [state, send] = useActor(service)

  useEffect(() => {
    state.context.main.screenshotButton = screenshotButton.current
  }, [])

  return (
    <Tooltip
      ref={screenshotButton}
      title="Screenshot"
      PopperProps={{
        anchorEl: screenshotButton.current,
        disablePortal: true,
        keepMounted: true
      }}
    >
      <IconButton
        size="small"
        onClick={() => {
          send('TAKE_SCREENSHOT')
        }}
      >
        <Icon>
          <img src={screenshotIconDataUri} />
        </Icon>
      </IconButton>
    </Tooltip>
  )
}

export default ScreenshotButton