internal static IEnumerable <EventCommandRef> GetCommandRefs(IModel model, EventCommand command)
{
ModelHandlers handlers = GetModelHandlers(command, model, false);
if (handlers == null)
{
return(Enumerable.Empty <EventCommandRef>());
}
lock (handlers) {
var result = new List <EventCommandRef>();
foreach (var wr in handlers.CommandRefs)
{
EventCommandRef commandRef;
if (wr.TryGetTarget(out commandRef))
{
result.Add(commandRef);
}
}
return(result);
}
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null || value == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var model = value as IModel;
if (model == null)
{
throw new ArgumentException("value must be IModel", "value");
}
EventCommand command = Command ?? Display.Command;
var commandRef = new EventCommandRef {
Command = command,
Display = Display,
Model = model,
};
EventCommands.AddCommandRef(model, command, commandRef);
return(commandRef);
}
protected void Subscribe(EventCommand command, Action execute, Func <bool> canExecute = null)
{
EventCommands.Subscribe(this, command, execute, canExecute);
}
protected void Unsubscribe(EventCommand command)
{
EventCommands.Unsubscribe(this, command);
}