play_button_.style.display = 'block';
                  }" loop="">
    <source src="https://flutter.github.io/assets-for-api-docs/assets/widgets/window_padding.mp4" type="video/mp4">
  </video>
</div>
<p>In this diagram, the black areas represent system UI that the app cannot
draw over. The red area represents view padding that the application may not
be able to detect gestures in and may not want to draw in. The grey area
represents the system keyboard, which can cover over the bottom view
padding when vi