public static PropertyChangeEvent CreateUpdateEvent(object source, string property, object newValue, object oldValue)
{
PropertyChangeEvent e = new PropertyChangeEvent(PROPERTY_CHANGE)
{
Kind = PropertyChangeEventKind.UPDATE,
OldValue = oldValue,
NewValue = newValue,
Source = source,
Property = property
};
return(e);
}
public static PropertyChangeEvent CreateUpdateEvent(object source, string property, object newValue, object oldValue)
{
PropertyChangeEvent e = new PropertyChangeEvent(PROPERTY_CHANGE)
{
Kind = PropertyChangeEventKind.UPDATE,
OldValue = oldValue,
NewValue = newValue,
Source = source,
Property = property
};
return e;
}
/// <summary>
/// Notify the view that an item has been updated
/// </summary>
/// <param name="item"></param>
/// <param name="property"></param>
/// <param name="oldValue"></param>
/// <param name="newValue"></param>
public void ItemUpdated(object item, object property = null, object oldValue = null, object newValue = null)
{
PropertyChangeEvent pce = new PropertyChangeEvent(PropertyChangeEvent.PROPERTY_CHANGE)
{
Kind = PropertyChangeEventKind.UPDATE,
Source = item,
Property = property.ToString(),
OldValue = oldValue,
NewValue = newValue
};
ItemUpdateHandler(pce);
}
/// <summary>
/// Dispatches a collection event with the specified information.
/// </summary>
/// <param name="kind"></param>
/// <param name="item"></param>
/// <param name="location"></param>
private void InternalDispatchEvent(CollectionEventKind kind, object item = null, int location= -1)
{
//Debug.Log(string.Format("InternalDispatchEvent: {0}, {1}, {2}", kind, item, location));
if (_dispatchEvents == 0)
{
if (HasEventListener(CollectionEvent.COLLECTION_CHANGE))
{
var ce = new CollectionEvent(CollectionEvent.COLLECTION_CHANGE) { Kind = kind };
ce.Items.Add(item);
ce.Location = location;
DispatchEvent(ce);
}
// now dispatch a complementary PropertyChangeEvent
if (HasEventListener(PropertyChangeEvent.PROPERTY_CHANGE) &&
(kind == CollectionEventKind.ADD || kind == CollectionEventKind.REMOVE))
{
var objEvent = new PropertyChangeEvent(PropertyChangeEvent.PROPERTY_CHANGE) {Property = location.ToString()};
if (kind == CollectionEventKind.ADD)
objEvent.NewValue = item;
else
objEvent.OldValue = item;
DispatchEvent(objEvent);
}
}
}
/**
* Place the item at the specified index.
* If an item was already at that index the new item will replace it and it
* will be returned.
*
* Param: item the new value for the index
* Param: index the index at which to place the item
* Returns: the item that was replaced, null if none
* @throws RangeError if index is less than 0 or greater than or equal to length
*/
public virtual object SetItemAt(object item, int index)
{
if (index < 0 || index >= Length)
{
throw new IndexOutOfRangeException("Range error");
}
object oldItem = Source[index];
Source[index] = item;
StopTrackUpdates(oldItem);
StartTrackUpdates(item);
//dispatch the appropriate events
if (_dispatchEvents == 0)
{
var hasCollectionListener = HasEventListener(CollectionEvent.COLLECTION_CHANGE);
var hasPropertyListener = HasEventListener(PropertyChangeEvent.PROPERTY_CHANGE);
PropertyChangeEvent updateInfo = null;
if (hasCollectionListener || hasPropertyListener)
{
updateInfo = new PropertyChangeEvent(PropertyChangeEvent.PROPERTY_CHANGE)
{
Kind = PropertyChangeEventKind.UPDATE,
OldValue = oldItem,
NewValue = item,
Property = index.ToString()
};
}
if (hasCollectionListener)
{
CollectionEvent ce = new CollectionEvent(CollectionEvent.COLLECTION_CHANGE)
{
Kind = CollectionEventKind.REPLACE,
Location = index
};
ce.Items.Add(updateInfo);
DispatchEvent(ce);
}
if (hasPropertyListener)
{
DispatchEvent(updateInfo);
}
}
return oldItem;
}
