private void GoToState(string newState, string oldState, bool useTransitions)
{
var cnt = 2;
VisualStateListenerCollection oldListener = null;
VisualStateListenerCollection newListener = null;
// ReSharper disable once ForCanBeConvertedToForeach
for (var index = 0; index < _listeners.Count; index++)
{
var listener = _listeners[index];
if (string.Equals(listener.StateName, newState, StringComparison.Ordinal))
{
newListener = listener;
cnt--;
}
if (string.Equals(listener.StateName, oldState, StringComparison.Ordinal))
{
oldListener = listener;
cnt--;
}
if (cnt == 0)
{
break;
}
}
newListener?.SetIsActive(true, useTransitions);
oldListener?.SetIsActive(false, useTransitions);
CurrentStateName = newState;
}
private VisualStateListenerCollection GetListenerCollection(string name, bool create)
{
var listenerCollection = FindListenerCollection(name);
if (listenerCollection == null && create == false)
{
return(null);
}
var groupObserver = FindGroupObserverByStateName(name);
if (groupObserver != null)
{
listenerCollection = groupObserver.GroupListener.GetListenerCollection(name, create);
}
if (listenerCollection != null)
{
_stateListenerCollections.Add(listenerCollection);
return(listenerCollection);
}
listenerCollection = new VisualStateListenerCollection(name);
_stateListenerCollections.Add(listenerCollection);
var visualStateGroup = EnumerateVisualStateGroups().SingleOrDefault(g => g.States.Cast <VisualState>().Any(s => string.Equals(s.Name, name, StringComparison.OrdinalIgnoreCase)));
if (visualStateGroup == null)
{
return(listenerCollection);
}
var groupListener = new VisualGroupListener();
groupListener.AddStateListenersCollection(listenerCollection);
groupObserver = new VisualStateGroupObserver(visualStateGroup, groupListener);
_visualStateGroupObservers.Add(groupObserver);
return(listenerCollection);
}
public void AddStateListenersCollection(VisualStateListenerCollection stateListeners)
{
_listeners.Add(UpdateListenerCollection(stateListeners));
}
private VisualStateListenerCollection UpdateListenerCollection(VisualStateListenerCollection listenerCollection)
{
listenerCollection.IsActive = string.Equals(CurrentStateName, listenerCollection.StateName, StringComparison.Ordinal);
return(listenerCollection);
}
