void OnTreeViewItemSelected(object sender, RoutedEventArgs e)
{
RichEditTreeViewItem item = (RichEditTreeViewItem)sender;
if (!item.IsSelected)
{
return;
}
CurrentTreeItem = item;
richEdit.Document.ChangeActiveDocument(richEdit.Document);
LayoutElement element = CurrentTreeItem.Info.Element;
if (CurrentTreeItem.Info.DisplayAction == ContentDisplayAction.ScrollTo)
{
TryScrollToHeader(element);
TryScrollToFooter(element);
TryScrollToFloatingObject(element);
TryScrollToComment(element);
}
else
{
RangedLayoutElement rangedElement = element as RangedLayoutElement;
if (rangedElement == null)
{
return;
}
ScrollToPosition(rangedElement.Range.Start);
richEdit.Document.Selection = richEdit.Document.CreateRange(rangedElement.Range.Start, rangedElement.Range.Length);
}
}
void AddTreeViewItem(ItemCollection collection, TreeViewItemInfo info)
{
RichEditTreeViewItem item = new RichEditTreeViewItem(info);
item.Header = GetTreeViewItemHeader(info.Element, collection.Count + 1);
item.Expanded += OnTreeViewItemExpanded;
item.Selected += OnTreeViewItemSelected;
collection.Add(item);
}
void OnTreeViewItemExpanded(object sender, RoutedEventArgs e)
{
RichEditTreeViewItem item = (RichEditTreeViewItem)sender;
if (item.HasItems)
{
return;
}
ChildElementsCollector collector = new ChildElementsCollector(item.Info);
int itemsCount = collector.Collection.Count;
for (int i = 0; i < itemsCount; i++)
{
AddTreeViewItem(item.Items, collector.Collection[i]);
}
}