private void RefreshQuickTypes()
{
bool previousValue = IgnoreInternalChanges();
try
{
_quickTypeCollection.Clear();
PropertyEntry containedProperty = this.PropertyEntry;
if (containedProperty == null)
{
return;
}
ModelProperty property = ((ModelPropertyEntry)containedProperty).FirstModelProperty;
Type containerValueType = ((ModelPropertyEntryBase)containedProperty).CommonValueType;
NewItemFactoryTypeModel selectedFactoryModel = null;
Type defaultItemType = GetDefaultItemType(property);
// Find all elligible NewItemFactoryTypes declared through metadata
IEnumerable <NewItemFactoryTypeModel> factoryModels =
ExtensibilityAccessor.GetNewItemFactoryTypeModels(
property,
ResourceUtilities.GetDesiredTypeIconSize(this));
if (factoryModels != null)
{
foreach (NewItemFactoryTypeModel factoryModel in factoryModels)
{
_quickTypeCollection.Add(factoryModel);
if (selectedFactoryModel == null)
{
if (object.Equals(containerValueType, factoryModel.Type))
{
selectedFactoryModel = factoryModel;
}
}
if (defaultItemType != null &&
object.Equals(defaultItemType, factoryModel.Type))
{
defaultItemType = null;
}
}
}
//add a null value - user should always have an option to clear property value
NewItemFactoryTypeModel nullTypeFactoryTypeModel =
new NewItemFactoryTypeModel(null, new NullItemFactory());
// Add a default item type based on the property type (if it wasn't also added through
// metadata)
if (defaultItemType != null)
{
NewItemFactoryTypeModel defaultItemFactoryTypeModel = new NewItemFactoryTypeModel(defaultItemType, new NewItemFactory());
_quickTypeCollection.Add(defaultItemFactoryTypeModel);
if (selectedFactoryModel == null)
{
if (object.Equals(containerValueType, defaultItemFactoryTypeModel.Type))
{
selectedFactoryModel = defaultItemFactoryTypeModel;
}
else if (containerValueType == null)
{
selectedFactoryModel = nullTypeFactoryTypeModel;
}
}
}
_quickTypeCollection.Add(nullTypeFactoryTypeModel);
// Make sure the currently selected value on the CollectionView reflects the
// actual value of the property
_quickTypeView.MoveCurrentTo(selectedFactoryModel);
this.CurrentQuickType = selectedFactoryModel;
}
finally
{
NoticeInternalChanges(previousValue);
}
}