private protected void UnsubscribeCanExecuteCommand(NotificationReflectorModel model, string propertyName)
{
var guaranteedCommandName = model.GetKeyCommand(propertyName);
_cmdProvider.RemoveCommand(guaranteedCommandName);
model.CanExecuteCommandChanged -= _subscribersDictionary[guaranteedCommandName];
_subscribersDictionary.Remove(guaranteedCommandName);
}
private void SubscribeCanExecuteCommandInternal(NotificationReflectorModel model, string propertyName, ICommand command, Func <string, bool> raiseFunc)
{
var guaranteedCommandName = model.GetKeyCommand(propertyName);
_cmdProvider.AddCommand(guaranteedCommandName, command);
CommandChangedEventHandler handler = (objectSender, commandName) =>
{
var result = raiseFunc.Invoke(commandName);
if (!result)
{
raiseFunc.Invoke(guaranteedCommandName);
}
};
model.CanExecuteCommandChanged += handler;
_subscribersDictionary.Add(guaranteedCommandName, handler);
}