internal override void LoadChildren()
{
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewLoadChildrenStart();
}
base.LoadChildren();
if (this.Value.IsCollection)
{
ModelItemCollection mc = this.Value.Value as ModelItemCollection;
TreeViewItemViewModel.AddModelItemCollection(this, mc, this.Value);
}
else if (this.Value.IsDictionary)
{
ModelItemDictionary dictionary = this.Value.Dictionary;
TreeViewItemViewModel.AddModelItemDictionary(this, dictionary, this.Value);
}
else if (this.Value.Value != null)
{
TreeViewItemViewModel.AddChild(this, this.Value.Value, this.Value.Value, this.DuplicatedNodeVisible, string.Empty, this.Value);
}
if (this.PerfEventProvider != null)
{
this.PerfEventProvider.DesignerTreeViewLoadChildrenEnd();
}
}
internal static void AddChild(TreeViewItemViewModel parent, ModelItem item, object value, bool duplicatedNodeVisible, string childNodePrefix, ModelProperty trackingProperty)
{
// If necessary, evaluate uniqueness of given item
bool isUnique = false;
if (!duplicatedNodeVisible)
{
// Note: These evaluations expect item to be an immediate child of trackingProperty.Value
// Intermediate nodes would for example undermine simple check just below
//
// Caveat 1: Aim is to greatly reduce, not to eliminate, display of nodes visible elsewhere
// Caveat 1a: Nodes reachable from other isolated nodes are included in the collection
// Caveat 1b: Nodes that are not isolated may be reachable from isolated nodes and thus
// displayed together with the isolated ones; ShowPropertyInOutlineViewAsSiblingAttribute may make this seem normal
// (If complete duplicate elimination were the aim, would likely need a "never expand"
// display mode for duplicateNodeVisible=false children)
// Caveat 2: Use of single uniqueChildren field may cause all children of a second
// duplcatedNodeVisible=false property to be ignored if (fortunately only if) neither
// property uses ShowPropertyInOutlineViewAttribute(true) -- that attribute's default
// Caveat 3-n: Please see caveats described at top of UniqueModelItemHelper
if (1 >= item.Parents.Count())
{
isUnique = true;
}
else
{
// Avoided a thorough evaluation as long as we can
if (null == parent.uniqueChildren)
{
parent.uniqueChildren = UniqueModelItemHelper.FindUniqueChildren(trackingProperty);
}
isUnique = parent.uniqueChildren.Contains(item);
}
}
// If displayable now, create the view model node
if (duplicatedNodeVisible || isUnique)
{
TreeViewItemViewModel child = TreeViewItemViewModel.CreateViewModel(parent, value);
child.NodePrefixText = childNodePrefix;
parent.AddChild(child, trackingProperty);
}
// Track for potential addition or removal of parents even if not presently visible
if (!duplicatedNodeVisible)
{
ModelItemImpl itemImpl = item as ModelItemImpl;
if (null != itemImpl)
{
ChangeNotificationTracker tracker = parent.GetTracker(trackingProperty);
tracker.AddCollection(itemImpl.InternalParents);
tracker.AddCollection(itemImpl.InternalSources);
}
}
}
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);
}
}
}
}
internal static void AddChild(TreeViewItemViewModel parent, ModelItem item, object value, bool duplicatedNodeVisible, string childNodePrefix, ModelProperty trackingProperty)
{
// If necessary, evaluate uniqueness of given item
bool isUnique = false;
if (!duplicatedNodeVisible)
{
// Note: These evaluations expect item to be an immediate child of trackingProperty.Value
// Intermediate nodes would for example undermine simple check just below
//
// Caveat 1: Aim is to greatly reduce, not to eliminate, display of nodes visible elsewhere
// Caveat 1a: Nodes reachable from other isolated nodes are included in the collection
// Caveat 1b: Nodes that are not isolated may be reachable from isolated nodes and thus
// displayed together with the isolated ones; ShowPropertyInOutlineViewAsSiblingAttribute may make this seem normal
// (If complete duplicate elimination were the aim, would likely need a "never expand"
// display mode for duplicateNodeVisible=false children)
// Caveat 2: Use of single uniqueChildren field may cause all children of a second
// duplcatedNodeVisible=false property to be ignored if (fortunately only if) neither
// property uses ShowPropertyInOutlineViewAttribute(true) -- that attribute's default
// Caveat 3-n: Please see caveats described at top of UniqueModelItemHelper
if (1 >= item.Parents.Count())
{
isUnique = true;
}
else
{
// Avoided a thorough evaluation as long as we can
if (null == parent.uniqueChildren)
{
parent.uniqueChildren = UniqueModelItemHelper.FindUniqueChildren(trackingProperty);
}
isUnique = parent.uniqueChildren.Contains(item);
}
}
// If displayable now, create the view model node
if (duplicatedNodeVisible || isUnique)
{
TreeViewItemViewModel child = TreeViewItemViewModel.CreateViewModel(parent, value);
child.NodePrefixText = childNodePrefix;
parent.AddChild(child, trackingProperty);
}
// Track for potential addition or removal of parents even if not presently visible
if (!duplicatedNodeVisible)
{
ModelItemImpl itemImpl = item as ModelItemImpl;
if (null != itemImpl)
{
ChangeNotificationTracker tracker = parent.GetTracker(trackingProperty);
tracker.AddCollection(itemImpl.InternalParents);
tracker.AddCollection(itemImpl.InternalSources);
}
}
}
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);
}
}
}
}