protected void OnSourcePropertyChanged(object sender, string propertyName)
{
Assert.IsTrue(IsBound);
if (sender != source)
{
Debug.LogWarningFormat("Invalid sender {0}:{1}", sender, sender.GetHashCode());
return;
}
if (propertyName != null && sourcePropertyName != propertyName)
{
// ignore invalid source path
return;
}
// get collection object
var collectionObject = BindingUtility.GetPropertyValue(source, sourcePropertyName);
if (collectionObject == null)
{
Debug.LogError("OnPropertyChanged failed, collectionObject is null", factory as UnityEngine.Object);
return;
}
// check if collection object is IEnumerable
IEnumerable newItemsSource = collectionObject as IEnumerable;
if (newItemsSource == null)
{
Debug.LogError("OnPropertyChanged failed, collectionObject is not IEnumerable", factory as UnityEngine.Object);
return;
}
// check if itemsSource is changed
if (itemsSource != newItemsSource)
{
ChangeItemsSource(newItemsSource);
}
else
{
// itemsSource is not changed, reset items
ResetItems();
}
UpdateCollectionView();
UpdateView();
}
public void Bind(object source)
{
if (source == null)
{
Debug.LogError("source is null", factory as UnityEngine.Object);
return;
}
if (IsBound)
{
Unbind();
}
// handle nested property
var bindingSource = BindingUtility.GetBindingObject(source, sourcePath);
if (bindingSource == null)
{
Debug.LogError("bindingSource is null", factory as UnityEngine.Object);
return;
}
// get collection object
var collectionObject = BindingUtility.GetPropertyValue(bindingSource, sourcePropertyName);
if (collectionObject == null)
{
Debug.LogError("Binding failed, collectionObject is null", factory as UnityEngine.Object);
return;
}
// check if collection object is IList
IList collectionSource = collectionObject as IList;
if (collectionSource == null)
{
var msg = string.Format("Binding failed, collection source is not IList object. source={0}, sourcePath={1}, collectionSource={2}",
source, sourcePath, collectionObject.GetType());
Debug.LogError(msg, factory as UnityEngine.Object);
return;
}
// save source
this.source = bindingSource;
this.itemsSource = collectionSource;
// register event
var notifyCollection = itemsSource as INotifyCollectionChanged;
if (notifyCollection != null)
{
notifyCollection.CollectionChanged += OnCollectionChanged;
}
// register property event
var notifyInterface = this.source as INotifyPropertyChanged;
if (notifyInterface != null)
{
notifyInterface.PropertyChanged += OnSourcePropertyChanged;
}
ResetItems();
UpdateView();
}