protected virtual bool RefillCollection <T>(ref SubscribableCollection <T> storage, IEnumerable <T> value, [CallerMemberName] string propertyName = "")
{
if (storage == value || value == null)
{
return(false);
}
else
{
OnPropertyChanging(propertyName);
if (storage == null)
{
if (value is SubscribableCollection <T> initCollection)
{
storage = initCollection;
}
else
{
storage = new SubscribableCollection <T>();
storage.AddRange(value);
}
}
else
{
storage.ReplaceWhole(value);
}
OnPropertyChanged(propertyName);
return(true);
}
}
private void ModelsCollection_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Reset)
{
internalList.Clear();
foreach (var model in modelsCollection)
{
internalList.Add(VMFabric(model));
}
}
else if (e.Action == NotifyCollectionChangedAction.Add)
{
if (e.NewStartingIndex > -1)
{
foreach (ModelType model in e.NewItems.Cast <ModelType>().Reverse())
{
internalList.Insert(e.NewStartingIndex, VMFabric(model));
}
}
else
{
internalList.AddRange(e.NewItems.Cast <ModelType>().Select(model => VMFabric(model)));
}
}
else if (e.Action == NotifyCollectionChangedAction.Move)
{
internalList.Move(e.OldStartingIndex, e.NewStartingIndex);
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
var removedArray = e.OldItems.Cast <ModelType>().ToArray();
internalList.RemoveAll(x => removedArray.Contains(x.Model));
}
else if (e.Action == NotifyCollectionChangedAction.Replace)
{
internalList[e.OldStartingIndex] = VMFabric((ModelType)e.NewItems[0]);
}
}