camera.dart

  Widget cameraOptionsWidget() {
    return Padding(
      padding: const EdgeInsets.all(5.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.start,
        children: <Widget>[
          showCamera ? cameraTogglesRowWidget() : Container(),
        ],
      ),
    );
  }

  Widget cameraTogglesRowWidget() {
    final List<Widget> toggles = <Widget>[];

    if (cameras != null) {
      if (cameras.isEmpty) {
        return const Text('No camera found');
      } else {
        for (CameraDescription cameraDescription in cameras) {
          toggles.add(
            SizedBox(
              width: 90.0,
              child: RadioListTile<CameraDescription>(
                title: Icon(getCameraLensIcon(cameraDescription.lensDirection)),
                groupValue: controller?.description,
                value: cameraDescription,
                onChanged: controller != null ? onNewCameraSelected : null,
              ),
            ),
          );
        }
      }
    }

    return Row(children: toggles);
  }