public ShellViewModel(GameService gameService, InteractivityService interactivityService, Dispatcher uiDispatcher)
{
_gameService = gameService ?? throw new ArgumentNullException(nameof(gameService));
_interactivityService = interactivityService ?? throw new ArgumentNullException(nameof(interactivityService));
_uiDispatcher = uiDispatcher ?? throw new ArgumentNullException(nameof(uiDispatcher));
_mainViewModel = new CreateViewModel(_gameService, interactivityService, _uiDispatcher);
_gameViewModel = new GameViewModel(_gameService, _uiDispatcher);
_newCommand = new SimpleCommand(Create, CanCreate);
_saveCommand = new SimpleCommand(Save, CanSave);
_saveAsCommand = new SimpleCommand(SaveAs, CanSaveAs);
_loadCommand = new SimpleCommand <string>(Load, CanLoad);
_exitCommand = new SimpleCommand(Exit);
_mainViewModel.Started += (s, e) => {
SetCurrentGameFilePath(null);
UpdateActiveViewModel();
};
_mainViewModel.Canceled += (s, e) => UpdateActiveViewModel();
_gameViewModel.PropertyChanged += (s, e) => {
_newCommand.RaiseCanExecuteChanged();
_loadCommand.RaiseCanExecuteChanged();
_saveCommand.RaiseCanExecuteChanged();
_saveAsCommand.RaiseCanExecuteChanged();
};
_gameService.CurrentGameChanged += (s, e) => {
// the service isn't expected to run the events on the main thread
_uiDispatcher.Invoke(() => {
_saveCommand.RaiseCanExecuteChanged();
UpdateActiveViewModel();
});
};
ActiveViewModel = _mainViewModel;
}
