public void DelegateCommand_EventTest1()
{
var eventFired = false;
EventHandler foo = (s, e) => eventFired = true;
var cmd = new DelegateCommand <string>(x => { }, x => true);
cmd.CanExecuteChanged += foo;
Assert.IsFalse(eventFired);
cmd.OnCanExecuteChanged();
Assert.IsTrue(eventFired);
eventFired = false;
cmd.CanExecuteChanged -= foo;
cmd.OnCanExecuteChanged();
Assert.IsFalse(eventFired);
}
public MainViewModel()
{
ShowSearchCommand = new DelegateCommand(ShowSearch);
ShowResultsCommand = new DelegateCommand(ShowResults, p => SearchBookService.LastSearchResult != null);
ShowFavoritesCommand = new DelegateCommand(ShowFavorites, p => FavoritesManager.Favorites.Count > 0);
SearchBookService.SuccessfulSearch += (aaaa, bbbb) => ShowResultsCommand.OnCanExecuteChanged();
FavoritesManager.FavoritesChanged += (asd, asda) => ShowFavoritesCommand.OnCanExecuteChanged();
}
public void DelegateCommand_EventTest2()
{
var eventFired = false;
EventHandler foo = (s, e) => eventFired = true;
var cmd = new DelegateCommand(() => { }, null);
cmd.CanExecuteChanged += foo;
Assert.IsFalse(eventFired);
cmd.OnCanExecuteChanged();
Assert.IsFalse(eventFired);
eventFired = false;
cmd.CanExecuteChanged -= foo;
cmd.OnCanExecuteChanged();
Assert.IsFalse(eventFired);
}
private void UpdateStateListCommands()
{
_Player1ScoredCommand.OnCanExecuteChanged();
_Player1ReducedCommand.OnCanExecuteChanged();
_Player2ScoredCommand.OnCanExecuteChanged();
_Player2ReducedCommand.OnCanExecuteChanged();
_UndoCommand.OnCanExecuteChanged();
OnPropertyChanged("CanToggleIsTieBreakEnabled");
OnPropertyChanged("IsTieBreakEnabled");
}
public MainWindowViewModel()
{
SuchCommand = new DelegateCommand(async p =>
{
Buchergebnisse = (await BookSearchService.Suche(Suchbegriff)).ToArray();
},
p => !string.IsNullOrWhiteSpace(Suchbegriff));
FavoritenCommand = new DelegateCommand(p =>
{
Header = "Favoriten";
Buchergebnisse = FavoritenManager.Favoriten.ToArray();
},
p => FavoritenManager.Favoriten.Count > 0);
AddFavoriteCommand = new DelegateCommand(p =>
{
if (p is Book book)
{
FavoritenManager.Favoriten.Add(book);
FavoritenCommand.OnCanExecuteChanged();
}
});
}