/// <summary>
/// The TREELIB (see FilterTreeViewLib (Project) > Properties > Conditional Compilation Symbol)
/// switch determines whether the TreeLib LevelOrder traversal function is used or not.
/// The point for training is here:
///
/// Both functions are equivalent but using the TreeLib traversal function should simplify
/// the problem of efficiently traversing any tree in the given order.
/// </summary>
#if TREELIB
///<summary>
/// Convert a Model into a ViewModel using
/// a LevelOrderTraversal Algorithm via TreeLib library.
///</summary>
internal static MetaLocationViewModel GetViewModelFromModel(MetaLocationModel srcRoot)
{
if (srcRoot == null)
{
return(null);
}
var srcItems = TreeLib.BreadthFirst.Traverse.LevelOrder(srcRoot, i => i.Children);
var dstIdItems = new Dictionary <int, MetaLocationViewModel>();
MetaLocationViewModel dstRoot = null;
foreach (var node in srcItems.Select(i => i.Node))
{
if (node.Parent == null)
{
dstRoot = new MetaLocationViewModel(node, null);
dstIdItems.Add(dstRoot.ID, dstRoot);
}
else
{
MetaLocationViewModel vmParentItem; // Find parent ViewModel for Model
dstIdItems.TryGetValue(node.Parent.ID, out vmParentItem);
var dstNode = new MetaLocationViewModel(node, vmParentItem);
vmParentItem.ChildrenAdd(dstNode); // Insert converted ViewModel below ViewModel parent
dstIdItems.Add(dstNode.ID, dstNode);
}
}
dstIdItems.Clear(); // Destroy temp ID look-up structure
return(dstRoot);
}
/// <summary>
/// Convert a Model into a ViewModel using
/// a LevelOrderTraversal Algorithm
/// </summary>
/// <param name="srcRoot"></param>
internal static MetaLocationViewModel GetViewModelFromModel(MetaLocationModel srcRoot)
{
if (srcRoot == null)
{
return(null);
}
MetaLocationViewModel dstRoot = new MetaLocationViewModel(srcRoot, null);
Queue <MetaLocationModel> srcQueue = new Queue <MetaLocationModel>();
Queue <MetaLocationViewModel> dstQueue = new Queue <MetaLocationViewModel>();
srcQueue.Enqueue(srcRoot);
dstQueue.Enqueue(dstRoot);
while (srcQueue.Count() > 0)
{
MetaLocationModel srcCurrent = srcQueue.Dequeue();
MetaLocationViewModel dstCurrent = dstQueue.Dequeue();
////Console.WriteLine(string.Format("{0,4} - {1}"
//// , iLevel, current.GetPath()));
foreach (var item in srcCurrent.Children)
{
var dstVM = new MetaLocationViewModel(item, dstCurrent);
dstCurrent.ChildrenAddBackupNodes(dstVM);
srcQueue.Enqueue(item);
dstQueue.Enqueue(dstVM);
}
}
return(dstRoot);
}
