private void SetPropertyValue(ModelItem oldModelItem, AttachedProperty property, ModelItem newModelItem)
{
// update the previous ModelItem (what was current before)
if (oldModelItem != null)
{
property.NotifyPropertyChanged(oldModelItem);
}
// update the current Modelitem
if (newModelItem != null)
{
property.NotifyPropertyChanged(newModelItem);
}
}
void OnItemSelected(Selection newSelection)
{
Fx.Assert(newSelection != null, "newSelection is null");
IList <ModelItem> newSelectionObjects = newSelection.SelectedObjects as IList <ModelItem>;
IList <ModelItem> oldSelectionObjects = oldSelection.SelectedObjects as IList <ModelItem>;
//Call notifyPropertyChanged for IsPrimarySelection attached property.
if (newSelection.PrimarySelection != null && !newSelection.PrimarySelection.Equals(oldSelection.PrimarySelection))
{
isPrimarySelectionProperty.NotifyPropertyChanged(oldSelection.PrimarySelection);
isPrimarySelectionProperty.NotifyPropertyChanged(newSelection.PrimarySelection);
}
else if (newSelection.PrimarySelection == null)
{
isPrimarySelectionProperty.NotifyPropertyChanged(oldSelection.PrimarySelection);
}
//call NotifyPropertyChanged for IsSelection property on ModelItems that were added or removed from selection.
HashSet <ModelItem> selectionChangeSet = new HashSet <ModelItem>(oldSelectionObjects);
selectionChangeSet.SymmetricExceptWith(newSelectionObjects);
foreach (ModelItem selectionChangeMI in selectionChangeSet)
{
isSelectionProperty.NotifyPropertyChanged(selectionChangeMI);
}
if (helpService != null)
{
if (oldSelection.PrimarySelection != null)
{
helpService.RemoveContextAttribute(string.Empty, GetF1HelpTypeKeyword(oldSelection.PrimarySelection.ItemType));
}
if (newSelection.PrimarySelection != null)
{
helpService.AddContextAttribute(string.Empty, GetF1HelpTypeKeyword(newSelection.PrimarySelection.ItemType), HelpKeywordType.F1Keyword);
}
}
oldSelection = newSelection;
}
void ModelChanged(object sender, ModelChangedEventArgs e)
{
ModelChangeInfo changeInfo = e.ModelChangeInfo;
if (changeInfo != null && changeInfo.ModelChangeType == ModelChangeType.PropertyChanged)
{
Type propertyType = changeInfo.Subject.ItemType;
if (changeInfo.PropertyName == "Name")
{
if (propertyType.Equals(typeof(ActivityBuilder)))
{
activityBuilderDisplayNameProperty.NotifyPropertyChanged(changeInfo.Subject);
}
else if (propertyType.Equals(typeof(ActivityTemplateFactoryBuilder)))
{
activityTemplateFactoryBuilderDisplayNameProperty.NotifyPropertyChanged(changeInfo.Subject);
}
}
}
}