public void Refresh(IBehaviorContext context, RefreshOptions options)
{
var collection = GetValue(context);
Repopulate(context, collection, RefreshReason.Create(options.ExecuteRefreshDependencies));
this.RefreshNext(context, options);
}
public void Refresh(IBehaviorContext context, RefreshOptions options)
{
// Call next behavior first, because a source accessor behavior may handle
// it.
this.RefreshNext(context, options);
_collectionSourceCache.Clear(context);
// ToArray so that (1) source is only enumerated once and (2) acess by index
// (required by the equality check) is guaranteed to be fast.
TItemSource[] newSourceItems = GetSourceItems(context).ToArray();
IVMCollection <TItemVM> vmCollection = GetValue(context);
IEnumerable <TItemVM> itemsToRefresh = Enumerable.Empty <TItemVM>();
if (AreCollectionContentsEqual(vmCollection, newSourceItems))
{
itemsToRefresh = vmCollection;
}
else
{
Dictionary <TItemSource, TItemVM> previousItemsBySource = vmCollection.ToDictionary(
x => x.Source,
_reusabilitySourceComparer
);
List <TItemVM> newItems = new List <TItemVM>();
List <TItemVM> reusedItems = new List <TItemVM>();
foreach (TItemSource s in newSourceItems)
{
TItemVM item;
bool isReusedItem = previousItemsBySource.TryGetValue(s, out item);
if (isReusedItem)
{
reusedItems.Add(item);
}
else
{
item = CreateAndInitializeItem(context, s);
}
newItems.Add(item);
}
vmCollection.ReplaceItems(newItems, RefreshReason.Create(options.ExecuteRefreshDependencies));
itemsToRefresh = reusedItems;
}
if (options.Scope.HasFlag(RefreshScope.Content))
{
itemsToRefresh
.ForEach(x => x.Kernel.RefreshWithoutValidation(options.ExecuteRefreshDependencies));
}
}
public void Refresh(IBehaviorContext context, RefreshOptions options)
{
RequireInitialized();
var previousValue = GetValue(context);
RefreshCache(context);
var newValue = GetValue(context);
if (!Object.Equals(newValue, previousValue))
{
var args = ChangeArgs.ViewModelPropertyChanged(
_property,
ValueStage.ValidatedValue,
previousValue,
newValue,
RefreshReason.Create(options.ExecuteRefreshDependencies)
);
context.NotifyChange(args);
}
this.RefreshNext(context, options);
}