private async Task LoadSymbolViewModel()
{
if (symbol == null)
{
return;
}
SymbolViewModel = new SymbolViewModel(
userAccount.Exchange, exchangeService, chartHelper,
orderBookHelperFactory.GetOrderBookHelper(userAccount.Exchange),
tradeHelperFactory.GetTradeHelper(userAccount.Exchange),
userAccount.Preferences, Logger)
{
Dispatcher = ViewModelContext.UiDispatcher
};
ObserveSymbol(SymbolViewModel);
try
{
await SymbolViewModel.SetSymbol(symbol);
SymbolViewModel.IsActive = true;
}
catch (Exception ex)
{
TradingViewModelException(ex.ToString(), ex);
}
}
private void DisposeSymbolViewModel()
{
if (SymbolViewModel != null)
{
SymbolViewModel.Dispose();
SymbolViewModel = null;
}
if (symbolObservableSubscription != null)
{
symbolObservableSubscription.Dispose();
symbolObservableSubscription = null;
}
}
private void ObserveSymbol(SymbolViewModel symbol)
{
var symbolObservable = Observable.FromEventPattern <SymbolEventArgs>(
eventHandler => symbol.OnSymbolNotification += eventHandler,
eventHandler => symbol.OnSymbolNotification -= eventHandler)
.Select(eventPattern => eventPattern.EventArgs);
symbolObservableSubscription = symbolObservable.Subscribe(args =>
{
if (args.HasException)
{
TradingViewModelException(args);
}
});
}
protected override void OnDisposing()
{
if (disposed)
{
return;
}
symbolsObservableSubscription?.Dispose();
tradeObservableSubscription?.Dispose();
accountObservableSubscription.Dispose();
symbolObservableSubscription?.Dispose();
AccountViewModel.Dispose();
SymbolsViewModel?.Dispose();
TradeViewModel?.Dispose();
SymbolViewModel?.Dispose();
disposed = true;
}
private async Task LoadSymbolViewModel()
{
if (symbol == null)
{
return;
}
SymbolViewModel = new SymbolViewModel(
userAccount.Exchange, exchangeService, chartHelper,
orderBookHelperFactory.GetOrderBookHelper(userAccount.Exchange),
tradeHelperFactory.GetTradeHelper(userAccount.Exchange),
userAccount.Preferences, Logger)
{
Dispatcher = ViewModelContext.UiDispatcher
};
ObserveSymbol(SymbolViewModel);
await SymbolViewModel.SetSymbol(symbol).ConfigureAwait(true);
SymbolViewModel.IsActive = true;
}
