/// <summary>
/// Add the observer to the outfit with proper change tracking.
/// </summary>
/// <remarks>
/// <para>
/// It is safe to use this method to add an existing observer. In this case the update will force a
/// change record. (Useful when the observer has already been added, but wasn't properly recorded
/// for serialization.)
/// </para>
/// </remarks>
/// <param name="outfit">The outfit. (Required)</param>
/// <param name="observer">The observer to add, or to update so it has change tracking. (Required)</param>
public static void AddObserverWithUndo(Outfit outfit, IOutfitObserver observer)
{
// Design note: Adding an observer can sometimes fail when added using the standard method.
// Don't know why yet. This method works in all cases.
var obj = (Object)observer;
var so = new UnityEditor.SerializedObject(outfit);
var prop = so.FindProperty("m_Observers.m_Items");
int idx = -1;
for (int i = 0; i < prop.arraySize; i++)
{
if (prop.GetArrayElementAtIndex(i).objectReferenceValue == obj)
{
prop.GetArrayElementAtIndex(idx).objectReferenceValue = null;
idx = i;
break;
}
}
if (idx == -1)
{
idx = prop.arraySize;
prop.arraySize++;
}
prop.GetArrayElementAtIndex(idx).objectReferenceValue = obj;
so.ApplyModifiedProperties();
}
public sealed override void RemoveObserver(IOutfitObserver observer)
{
Observers.Remove(observer);
}
/// <summary> /// Remove the specified event listener. /// </summary> /// <param name="observer">The observer to remove. (Required)</param> public abstract void RemoveObserver(IOutfitObserver observer);
public sealed override bool AddObserver(IOutfitObserver observer)
{
return(Observers.Add(observer, this) != -1);
}
/// <summary> /// Add the specified event observer. /// </summary> /// <remarks> /// <para> /// An observer can only be added once and it must be implmented by a UnityEngine.Object for serialization /// puposes. /// </para> /// </remarks> /// <param name="observer">The observer to add. (Required. Must be a UnityEngine.Object.)</param> /// <returns> /// True if the observer was accepted or already added, or false if the observer is not implemented by /// a UnityEngine.Object. /// </returns> public abstract bool AddObserver(IOutfitObserver observer);
