public MainViewModel()
        {
            SwitchTo2DCommand  = new BindableCommand(SwitchTo2D);
            SwitchTo3DCommand  = new BindableCommand(SwitchTo3D);
            SwitchToMPRCommand = new BindableCommand(SwitchToMPR);

            VolumeViewer  = new VolumeViewerViewModel();
            ImageViewer   = new ImageViewerViewModel();
            MPRViewer     = new MPRViewerViewModel();
            CurrentViewer = new StartViewModel();
        }
 public ScanPresenter3D(MainViewModel mainViewModel, VolumeViewerViewModel volumeViewerViewModel)
 {
     _mainViewModel         = mainViewModel;
     _volumeViewerViewModel = volumeViewerViewModel;
 }