takePictureThumb function Null safety

Future<void> takePictureThumb(
  1. BuildContext context
)

use with ThumbWindow to take a picture and then display the thumbnails. ThumbWindow combines a ResponseWindow with a window that will display the thumbnails that are on the camera. This function will first wait for the current picture to be processed and then will get the last 5 thumbs, including the thumb for the picture you just took. It will display the status of the current image processing after the shutter is triggered as text messages, then pull the thumb bytes down from the camera and then send the list of 5 thumbs to ThumbWindow

Implementation

Future<void> takePictureThumb(BuildContext context) async {
  Stopwatch stopwatch = Stopwatch();
  stopwatch.start();
  var response = await command('takePicture');
  String responseText = response;
  responseText = responseText +
      '\ncompleted command in ${stopwatch.elapsedMilliseconds} milliseconds '
          '\n Camera still needs to process image and is unavailable for commands ';

  // set screen to text
  Provider.of<WindowNotifier>(context, listen: false).setShowThumbWindow(false);

  Provider.of<ResponseNotifier>(context, listen: false)
      .setResponseText(responseText);
  Map<String, dynamic> responseMap = jsonDecode(response);
  String id = responseMap['id'];

  while (await commandStatus(id) != 'done') {
    await commandStatus(id);
    await Future.delayed(const Duration(milliseconds: 200));
    responseText = responseText +
        '\nCamera processing image. Elapsed time: ${stopwatch.elapsedMilliseconds} milliseconds';
    Provider.of<ResponseNotifier>(context, listen: false)
        .setResponseText(responseText);
  }
  responseText = responseText + '\nCamera is ready for next command';
  String url = await getLastImageUrl();
  // print(url);
  responseText += '\nFile is available at\n$url';
  Provider.of<ResponseNotifier>(context, listen: false)
      .setResponseText(responseText);
  stopwatch.stop();
  List<String> thumbData = await sc2ThumbGetBytes();
  Provider.of<WindowNotifier>(context, listen: false).setThumbData(thumbData);

  Provider.of<WindowNotifier>(context, listen: false).setShowThumbWindow(true);
}