static void Main(string[] args)
{
// создание одного издателя событий
var newsAggregator = new NewsAggregator();
// создание трех наблюдателей
var twitterWidget = new TwitterWidget();
var lentaWidget = new LentaWidget();
var tvWidget = new TvWidget();
// подписка наблюдателей на событие NewsChanged издателя
//System.Console.WriteLine(newsAggregator.NewsChanged);
newsAggregator.NewsChanged += twitterWidget.Update;
//System.Console.WriteLine(newsAggregator.NewsChanged);
newsAggregator.NewsChanged += lentaWidget.Update;
//System.Console.WriteLine(newsAggregator.NewsChanged);
newsAggregator.NewsChanged += tvWidget.Update;
//System.Console.WriteLine(newsAggregator.NewsChanged);
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewsChanged -= twitterWidget.Update;
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main(string[] args)
{
//объявление новых наблюдателей (виджетов)
var newsAggregator = new NewsAggregator();
var twitterWidget = new TwitterWidget(newsAggregator); // регистрация во время создания объекта
var lentaWidget = new LentaWidget(newsAggregator);
var tvWidget = new TvWidget(newsAggregator);
//вызов метода, производящего обновление новостей
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main(string[] args)
{
var newsAggregator = new NewsAggregator();
var twitterWidget = new TwitterWidget(newsAggregator);
var lentaWidget = new LentaWidget(newsAggregator);
var tvWidget = new TvWidget(newsAggregator);
newsAggregator.NewNewsAvailable();
Console.WriteLine();
twitterWidget.RemoveFormSubject();
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main()
{
var newsAggregator = new NewsAggregator();
var twitterWidget = new TwitterWidget(newsAggregator);
var lentaWidget = new LentaWidget(newsAggregator);
var tvWidget = new TvWidget(newsAggregator);
newsAggregator.NewNewsAvailable();
Console.WriteLine();
twitterWidget.Unsubscribe();
newsAggregator.NewNewsAvailable();
}
static void Main(string[] args)
{
var newsAggregator = new NewsAggregator();
var instagramWidget = new InstagramWidget();
var twitterWidget = new TwitterWidget();
newsAggregator.NewsChanged += new NewsChangedEventHandler(instagramWidget.Update);
newsAggregator.NewsChanged += new NewsChangedEventHandler(twitterWidget.Update);
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewsChanged -= new NewsChangedEventHandler(instagramWidget.Update);
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main(string[] args)
{
var newsAggregator = new NewsAggregator();
var franceFootballWidget = new FranceFootballWidget();
var deportivoWidget = new DeportivoWidget();
var barcaNewsWidget = new BarcaNewsWidget();
newsAggregator.NewsChanged += franceFootballWidget.Update;
newsAggregator.NewsChanged += deportivoWidget.Update;
newsAggregator.NewsChanged += barcaNewsWidget.Update;
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewsChanged -= franceFootballWidget.Update;
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main(string[] args)
{
var newsAggregator = new NewsAggregator();
var twitterWidget = new TwitterWidget();
var lentaWidget = new LentaWidget();
var tvWidget = new TvWidget();
newsAggregator.NewsChanged += twitterWidget.Update;
newsAggregator.NewsChanged += lentaWidget.Update;
newsAggregator.NewsChanged += tvWidget.Update;
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewsChanged -= twitterWidget.Update;
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main()
{
var aggregator = new NewsAggregator();
var twitter = new TwitterObserver();
var vk = new VkObserver();
aggregator.NewsChanged += twitter.Update;
aggregator.NewsChanged += vk.Update;
aggregator.NewNewsAvailable();
Console.WriteLine("--------------");
aggregator.NewNewsAvailable();
aggregator.NewsChanged -= vk.Update;
Console.WriteLine("--------------");
aggregator.NewNewsAvailable();
Console.ReadLine();
}
static void Main(string[] args)
{
var newsAggregator = new NewsAggregator();
var twitterWidget = new TwitterWidget();
var lentaWidget = new LentaWidget();
var tvWidget = new TvWidget();
//handlers can be matched inside ctor of widget class
//newsAggregator.NewsChanged += (s, a) => Console.WriteLine("{0} say: {1}, {2}, {3}", s, a.Lenta, a.Tv, a.Twitter);
newsAggregator.NewsChanged += twitterWidget.Update;
newsAggregator.NewsChanged += lentaWidget.Update;
newsAggregator.NewsChanged += tvWidget.Update;
newsAggregator.NewNewsAvailable();
Console.WriteLine();
newsAggregator.NewsChanged -= twitterWidget.Update;
newsAggregator.NewNewsAvailable();
Console.ReadLine();
}
