/// <summary>
/// Note: This method validates that the target listener object is still around, if the
/// listener object is null, it removes any delegates bound to that object. This is the
/// only part of the code that is Unity specific. If you'd like to us SimpleSignals in
/// a vanilla C# enviornment, this is the only method that needs to be tweaked.
/// </summary>
protected bool ValidateSignalListener(SignalManager signalManager, SignalListenerItem listener)
{
bool isInvokable = true;
object target = listener.SignalDelegate.Target;
// <UnitySpecific>
// Comment this code out if you're not using MonoBehaviors
if (target is MonoBehaviour)
{
MonoBehaviour targetGO = (MonoBehaviour)target;
// Don't invoke listeners on destroyed GameObjects instead Clean up listeners
if (targetGO == null && !ReferenceEquals(targetGO, null))
{
isInvokable = false;
SignalManager.UnbindSignals(signalManager, targetGO);
}
}
// </UnitySpecific>
// This listener delegate will be removed after it's invoked
if (listener.ListenerType == ListenerType.Once)
{
this.listenersToRemove.Add(listener);
}
return(isInvokable);
}
public void Invoke(SignalManager signalManager)
{
foreach (var listener in listeners)
{
if (ValidateSignalListener(signalManager, listener))
{
((SignalDelegate)listener.SignalDelegate).Invoke();
}
}
RemoveDiscardedSignalListenerItems();
}
///<summary>
/// Helper function that binds the methods decorated with ListenTo attributes in the listener object
/// to the corresponding Signal instances in the SignalContext assigned to the signalManager.
///</summary>
static public SignalManager BindSignals(SignalManager signalManager, System.Object listenerObject)
{
if (signalManager != null)
{
signalManager.BindSignals(listenerObject);
return(signalManager);
}
else
{
throw new ArgumentException("Attempting to bind signals to a null signalManager");
}
}
///<summary>
/// Helper function that unbinds any signal listeners in the listenerObject from any Signal instances
/// in the SignalContext assigned to the specified signalManager.
///</summary>
static public void UnbindSignals(SignalManager signalManager, System.Object listenerObject)
{
if (signalManager != null)
{
if (signalManager.isInvoking)
{
signalManager.objectsToUnbind.Add(listenerObject);
}
else
{
signalManager.UnbindSignals(listenerObject);
}
}
}
virtual public void Invoke(SignalManager signalManager, params object[] list)
{
this.Invoke(signalManager);
}
