internal static bool IsPromotedProperty(ModelItem modelItem, string propertyName)
{
ShowInOutlineViewAttribute attr = ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(modelItem);
if (attr != null && !string.IsNullOrEmpty(attr.PromotedProperty))
{
return(string.Equals(propertyName, attr.PromotedProperty, StringComparison.Ordinal));
}
return(false);
}
internal override ChangeNotificationTracker GetTracker(ModelProperty modelProperty, bool createNew)
{
ChangeNotificationTracker tracker = base.GetTracker(modelProperty, createNew);
if (createNew)
{
Fx.Assert(this.Value == modelProperty, "The modelProperty should be the same as this.Value.");
tracker.Add(modelProperty.Parent, modelProperty);
ShowInOutlineViewAttribute viewVisible = ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(modelProperty);
if (viewVisible != null && !string.IsNullOrWhiteSpace(viewVisible.PromotedProperty))
{
ModelProperty promotedProperty = modelProperty.Value.Properties.Find(viewVisible.PromotedProperty);
tracker.Add(promotedProperty.Parent, promotedProperty);
}
}
return(tracker);
}
public TreeViewItemModelItemViewModel(TreeViewItemViewModel parent, ModelItem modelItem, bool lazyLoad)
: base(parent)
{
this.Value = modelItem;
ShowInOutlineViewAttribute attr = ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(modelItem);
if (attr != null && !string.IsNullOrEmpty(attr.PromotedProperty))
{
// Only consider one level of promoted property.
this.promotedProperty = modelItem.Properties[attr.PromotedProperty];
if (this.promotedProperty != null)
{
this.VisualValue = this.promotedProperty.Value;
}
else
{
// is this what we really want?
Fx.Assert(attr.PromotedProperty + " not found on " + modelItem.Name);
this.VisualValue = null;
}
}
else
{
this.VisualValue = modelItem;
}
IsHighlighted = Selection.IsSelection(this.VisualValue);
if (lazyLoad)
{
this.UpdateState();
if (this.HasChildren)
{
this.InternalChildren.Add(TreeViewItemViewModel.DummyNode);
}
}
else
{
this.LoadChildren();
}
}
internal static void AddModelProperty(TreeViewItemViewModel parent, ModelItem item, ModelProperty trackingProperty, ModelProperty property)
{
//in the case of multiple attributes, they go in this order
//HidePropertyInOutlineViewAttribute
//[item.ShowInOutlineViewAttribute.PromotedProperty = property.Name]. Set VisualValue by property and ignore itself. Usage ActivityDelegate, FlowStep.
//ShowPropertyInOutlineViewAttribute
//ShowPropertyInOutlineViewAsSiblingAttribute
//ShowInOutlineViewAttribute
ShowPropertyInOutlineViewAttribute viewChild = ExtensibilityAccessor.GetAttribute <ShowPropertyInOutlineViewAttribute>(property);
if (ExtensibilityAccessor.GetAttribute <HidePropertyInOutlineViewAttribute>(property) != null)
{
//ignore
return;
}
else if (IsPromotedProperty(item, property))
{
if (property.IsCollection)
{
ModelItemCollection mc = property.Value as ModelItemCollection;
AddModelItemCollection(parent, mc, trackingProperty);
}
else if (property.IsDictionary)
{
ModelItemDictionary dictionary = property.Dictionary;
AddModelItemDictionary(parent, dictionary, trackingProperty);
}
else
{
parent.GetTracker(trackingProperty).Add(item, property);
//if property.Value is null, then this would not add any node
// Use promoted ModelItem's property to track, so pass null to AddModelItem method.
AddModelItem(parent, property.Value, null);
}
}
else if (viewChild != null)
{
if (viewChild.CurrentPropertyVisible) //property node visible
{
if (property.Value != null)
{
TreeViewItemViewModel childModel = TreeViewItemViewModel.CreateViewModel(parent, property);
childModel.DuplicatedNodeVisible = viewChild.DuplicatedChildNodesVisible;
parent.AddChild(childModel, trackingProperty);
}
else
{
//just add the notification tracker without adding the empty child
parent.GetTracker(trackingProperty, true).Add(item, trackingProperty);
}
}
else
{
if (property.IsCollection)
{
ModelItemCollection mc = property.Value as ModelItemCollection;
AddModelItemCollection(parent, mc, trackingProperty);
}
else if (property.IsDictionary)
{
ModelItemDictionary dictionary = property.Dictionary;
AddModelItemDictionary(parent, dictionary, trackingProperty);
}
else
{
if (property.Value != null)
{
TreeViewItemViewModel childModel = TreeViewItemViewModel.CreateViewModel(parent, property.Value);
childModel.DuplicatedNodeVisible = viewChild.DuplicatedChildNodesVisible;
parent.AddChild(childModel, trackingProperty);
}
else
{
parent.GetTracker(trackingProperty).Add(item, property);
}
}
}
}
else if (ExtensibilityAccessor.GetAttribute <ShowPropertyInOutlineViewAsSiblingAttribute>(property) != null)
{
//add notification to the tracker that is responsible for this node
ChangeNotificationTracker tracker = parent.Parent.GetTracker(parent);
tracker.Add(item, property);
TreeViewItemViewModel siblingNode = null;
if (property.Value != null)
{
siblingNode = TreeViewItemViewModel.CreateViewModel(parent.Parent, property.Value);
}
parent.Parent.AddChild(siblingNode, tracker.ParentProperty);
}
else if (ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(property) != null)
{
if (property.Value != null)
{
ShowInOutlineViewAttribute outlineView = ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(property);
if (string.IsNullOrWhiteSpace(outlineView.PromotedProperty))
{
parent.AddChild(TreeViewItemViewModel.CreateViewModel(parent, property), trackingProperty);
}
else
{
ModelProperty promotedProperty = property.Value.Properties.Find(outlineView.PromotedProperty);
if (promotedProperty == null)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, SR.PromotedPropertyNotFound, outlineView.PromotedProperty, property.Value.Name)));
}
// Add promoted ModelItem and property into tracker. So when property got changed, the grandparent of promoted ModelItem will be notified.
ChangeNotificationTracker tracker = parent.GetTracker(trackingProperty, true);
tracker.Add(property.Value, promotedProperty);
if (promotedProperty.Value == null)
{
tracker.Add(item, property);
}
else
{
parent.AddChild(TreeViewItemViewModel.CreateViewModel(parent, property), trackingProperty);
}
}
}
else
{
parent.GetTracker(trackingProperty, true).Add(item, property);
}
}
//if the values in the dictionary is viewvisible, note this only works with generic dictionary
else if (property.IsDictionary && property.PropertyType.IsGenericType)
{
Type[] arguments = property.PropertyType.GetGenericArguments();
if (ExtensibilityAccessor.GetAttribute <ShowInOutlineViewAttribute>(arguments[1]) != null)
{
if (property.Value != null)
{
parent.AddChild(TreeViewItemViewModel.CreateViewModel(parent, property), trackingProperty);
}
else
{
parent.GetTracker(trackingProperty, true).Add(item, property);
}
}
}
}
