// 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(',');
string categoryName = PersistedStateUtilities.Unescape(pathValues[0]);
bool isAdvanced = pathValues.Length == 2;
CategoryEntry category = root.FindCategory(categoryName);
if (category == null)
{
return(null);
}
DependencyObject categoryVisual = root.FindCategoryEntryVisual(category);
if (categoryVisual == null)
{
return(null);
}
DependencyObject searchStart;
// For basic section, start at the root.
// For advanced section, start at the advanced expander.
// The next SelectionStop in both cases will be the section header SelectionStop.
if (!isAdvanced)
{
searchStart = categoryVisual;
}
else
{
searchStart = VisualTreeUtils.GetNamedChild <FrameworkElement>(categoryVisual, "PART_AdvancedExpander");
}
return(PropertySelection.FindNeighborSelectionStop <DependencyObject>(searchStart, SearchDirection.Next));
}
// Called when the UI object representing a SelectionStop gets clicked:
//
// * If this is a double-click and the SelectionStop can be expanded / collapsed,
// expand / collapse the SelectionStop
//
private static void OnSelectionStopDoubleClickTargetMouseDown(object sender, MouseButtonEventArgs e)
{
DependencyObject target = e.OriginalSource as DependencyObject;
if (target == null)
{
return;
}
if (e.ClickCount > 1)
{
FrameworkElement parentSelectionStopVisual = PropertySelection.FindParentSelectionStop <FrameworkElement>(target);
if (parentSelectionStopVisual != null)
{
ISelectionStop parentSelectionStop = PropertySelection.GetSelectionStop(parentSelectionStopVisual);
if (parentSelectionStop != null && parentSelectionStop.IsExpandable)
{
parentSelectionStop.IsExpanded = !parentSelectionStop.IsExpanded;
}
}
}
}
// Helper method that returns false if the given element is a collapsed SelectionStop,
// true otherwise.
//
private static bool IsExpanded(DependencyObject element)
{
ISelectionStop selectionStop = PropertySelection.GetSelectionStop(element);
return(selectionStop == null || selectionStop.IsExpanded);
}
