internal ExplorerTreeViewItem GetTreeViewItem(ExplorerEFElement explorerElement, bool returnAncestorTreeViewItemIfNotAvailable)
{
if (explorerElement == null)
{
return(null);
}
var treeViewItem = ExplorerTreeRoot;
// need to Skip() the ExplorerRootNode because it is not the DataContext for any UI Element in the tree
foreach (var item in explorerElement.SelfAndAncestors().Reverse().Skip(1))
{
//Note: if the ItemContainerGenerator status is NotStarted, the UI Element is not created yet.
//This causes ContainerFromItem call returns NULL.
if (treeViewItem.ItemContainerGenerator.Status == GeneratorStatus.NotStarted)
{
treeViewItem.UpdateLayout();
}
var childTreeViewItem = (ExplorerTreeViewItem)treeViewItem.ItemContainerGenerator.ContainerFromItem(item);
if (childTreeViewItem == null)
{
if (returnAncestorTreeViewItemIfNotAvailable)
{
return(treeViewItem);
}
else
{
treeViewItem = null;
break;
}
}
else
{
treeViewItem = childTreeViewItem;
}
}
Debug.Assert(treeViewItem == null || treeViewItem.DataContext == explorerElement);
return(treeViewItem);
}
internal ExplorerTreeViewItem GetTreeViewItem(ExplorerEFElement explorerElement, bool returnAncestorTreeViewItemIfNotAvailable)
{
if (explorerElement == null)
{
return null;
}
var treeViewItem = ExplorerTreeRoot;
// need to Skip() the ExplorerRootNode because it is not the DataContext for any UI Element in the tree
foreach (var item in explorerElement.SelfAndAncestors().Reverse().Skip(1))
{
//Note: if the ItemContainerGenerator status is NotStarted, the UI Element is not created yet.
//This causes ContainerFromItem call returns NULL.
if (treeViewItem.ItemContainerGenerator.Status == GeneratorStatus.NotStarted)
{
treeViewItem.UpdateLayout();
}
var childTreeViewItem = (ExplorerTreeViewItem)treeViewItem.ItemContainerGenerator.ContainerFromItem(item);
if (childTreeViewItem == null)
{
if (returnAncestorTreeViewItemIfNotAvailable)
{
return treeViewItem;
}
else
{
treeViewItem = null;
break;
}
}
else
{
treeViewItem = childTreeViewItem;
}
}
Debug.Assert(treeViewItem == null || treeViewItem.DataContext == explorerElement);
return treeViewItem;
}
