public static void TriggerEventHandler <TArgs>(this GraphStack stack, Func <EventHook, bool> predicate, TArgs args, Func <IGraphParentElement, bool> recurse, bool force)
{
Ensure.That(nameof(stack)).IsNotNull(stack);
GraphReference reference = null;
foreach (var element in stack.graph.elements)
{
if (element is IGraphEventHandler <TArgs> handler)
{
if (reference == null)
{
reference = stack.ToReference();
}
if (predicate == null || predicate.Invoke(handler.GetHook(reference)))
{
if (force || handler.IsListening(reference))
{
handler.Trigger(reference, args);
}
}
}
if (element is IGraphParentElement parentElement && recurse(parentElement))
{
if (stack.TryEnterParentElementUnsafe(parentElement))
{
stack.TriggerEventHandler(predicate, args, recurse, force);
stack.ExitParentElement();
}
}
}
}
public void StartListening(GraphStack stack)
{
var data = stack.GetElementData <Data>(this);
if (data.isListening)
{
return;
}
var reference = stack.ToReference();
var hook = new EventHook(EventHooks.Update, stack.machine);
Action <EmptyEventArgs> update = args => TriggerUpdate(reference);
EventBus.Register(hook, update);
data.update = update;
data.isListening = true;
}
public virtual void StartListening(GraphStack stack)
{
var data = stack.GetElementData <Data>(this);
if (data.isListening)
{
return;
}
if (register)
{
var reference = stack.ToReference();
var hook = GetHook(reference);
Action <TArgs> handler = args => Trigger(reference, args);
EventBus.Register(hook, handler);
data.hook = hook;
data.handler = handler;
}
data.isListening = true;
}
private void UpdateTarget(GraphStack stack)
{
var data = stack.GetElementData <Data>(this);
var wasListening = data.isListening;
var newTarget = Flow.FetchValue <GameObject>(target, stack.ToReference());
if (newTarget != data.target)
{
if (wasListening)
{
StopListening(stack);
}
data.target = newTarget;
if (wasListening)
{
StartListening(stack, false);
}
}
}