private void ObserveSymbol(SymbolViewModel symbol)
{
var symbolObservable = Observable.FromEventPattern <SymbolEventArgs>(
eventHandler => symbol.OnSymbolNotification += eventHandler,
eventHandler => symbol.OnSymbolNotification -= eventHandler)
.Select(eventPattern => eventPattern.EventArgs);
symbolObservable.Subscribe(args =>
{
if (args.HasException)
{
TradeViewModelException(args);
}
});
}
private void ObserveSymbols()
{
var symbolsObservable = Observable.FromEventPattern <SymbolsEventArgs>(
eventHandler => SymbolsViewModel.OnSymbolsNotification += eventHandler,
eventHandler => SymbolsViewModel.OnSymbolsNotification -= eventHandler)
.Select(eventPattern => eventPattern.EventArgs);
symbolsObservable.Subscribe(async(args) =>
{
if (args.HasException)
{
TradeViewModelException(args);
}
else if (args.Value != null)
{
var symbol = Symbols.FirstOrDefault(s => s.Symbol.Name.Equals(args.Value.Name));
if (symbol != null)
{
SelectedSymbol = symbol;
}
else
{
symbol = new SymbolViewModel(exchangeService);
symbol.Dispatcher = ViewModelContext.UiDispatcher;
ObserveSymbol(symbol);
Symbols.Add(symbol);
SelectedSymbol = symbol;
await symbol.SetSymbol(args.Value);
}
}
else if (args.Symbols != null)
{
TradeViewModel.SetSymbols(args.Symbols);
}
});
}