public Task Execute(RoutedCommand command, object target, object parameter, CancellationToken?token = null)
{
target = WpfObjectProxy.UnwrapIfProxy(target);
if (!(target is IInputElement))
{
throw new InvalidOperationException("Cannot execute command on " + ToString());
}
parameter = WpfObjectProxy.UnwrapIfProxy(parameter);
return(InvokeAsync(() => command.Execute(parameter, target as IInputElement), token: token ?? DefaultCancellationToken));
}
public bool CanExecute(RoutedCommand command, object target, object parameter)
{
target = WpfObjectProxy.UnwrapIfProxy(target);
if (!(target is IInputElement))
{
return(false);
}
parameter = WpfObjectProxy.UnwrapIfProxy(parameter);
return(Invoke(
() => command.CanExecute(parameter, (IInputElement)target),
DispatcherPriority.SystemIdle
));
}