// ISelectionPathInterpreter Members
public DependencyObject ResolveSelectionPath(CategoryList root, SelectionPath path, out bool pendingGeneration)
{
pendingGeneration = false;
if (path == null || !string.Equals(PathTypeId, path.PathTypeId))
{
Debug.Fail("Invalid SelectionPath specified.");
return(null);
}
if (root == null)
{
Debug.Fail("No CategoryList specified.");
return(null);
}
string[] pathValues = path.Path.Split(',');
if (pathValues.Length < 1)
{
Debug.Fail("Invalid SelectionPath specified.");
return(null);
}
//
// Note: By the time this method gets called, all the visuals should have been expanded
// and rendered. Hence, if we can't find a visual in the visual tree, it doesn't exist
// and we shouldn't worry about trying to expand some parent visual and waiting for it
// to render.
//
ModelCategoryEntry parentCategory;
PropertyEntry currentProperty = root.FindPropertyEntry(PersistedStateUtilities.Unescape(pathValues[0]), out parentCategory);
PropertyContainer currentContainer = root.FindPropertyEntryVisual(currentProperty, parentCategory, out pendingGeneration);
DependencyObject lastFoundContainer = currentContainer;
int pathIndex = 1;
while (currentContainer != null && pathIndex < pathValues.Length)
{
SubPropertyEditor subPropertyEditor = VisualTreeUtils.GetTemplateChild <SubPropertyEditor>(currentContainer);
if (subPropertyEditor == null)
{
break;
}
// If the subpropertyEditor is not expanded and is expandable, we won't be able to get the target property's visual
// element, Expand it, set pendingGeneration to True, and return null. Expect the caller to call again.
if (subPropertyEditor.IsExpandable && !subPropertyEditor.IsExpanded)
{
subPropertyEditor.IsExpanded = true;
pendingGeneration = true;
return(null);
}
PropertyEntry property = subPropertyEditor.FindSubPropertyEntry(PersistedStateUtilities.Unescape(pathValues[pathIndex]));
if (property == null)
{
break;
}
currentContainer = subPropertyEditor.FindSubPropertyEntryVisual(property);
lastFoundContainer = currentContainer ?? lastFoundContainer;
pathIndex++;
}
if (lastFoundContainer == null)
{
return(null);
}
return(lastFoundContainer);
}