public void t07_TreeViewViewModel()
{
SIEETreeView Folders = new SIEETreeView(null);
TVIViewModel tviVM;
TVIViewModel tviVMa;
string testPath = Path.GetTempPath();
testPath = testPath.Substring(0, testPath.Length - 1); // Remove trailing "\"
findFolderBruteForce(testPath);
string startPath = testPath.Split('\\').First() + @"\"; // e.g. "C:\"
FilesystemFolder startFsf = new FilesystemFolder(null, new DirectoryInfo(startPath));
// Select a folder and verify results
Folders.AddItem(new TVIViewModel(startFsf, null, true));
Assert.AreEqual(startPath, Folders[0].GetDisplayNamePath(), "t0");
tviVM = Folders.FindNodeInTree(testPath);
verifySelectedNode(tviVM, testPath, "t1");
// Serialize and reinstantiate
List <string> serializedPath = tviVM.GetSerializedPath();
Folders.Clear();
Folders.AddItem(new TVIViewModel(startFsf, null, true));
tviVM = Folders.InitializeTree(serializedPath, typeof(FilesystemFolder));
verifySelectedNode(tviVM, testPath, "t2");
tviVMa = Folders.FindNodeInTree(testPath);
verifySelectedNode(tviVMa, testPath, "t3");
}
// Find the node in the tree starting at the current node
// Expand tree if necessary
public TVIViewModel FindNodeInTree(string idPath)
{
if (this.Count() == 0)
{
return(null);
}
string concatString = this[0].Tvim.GetPathConcatenationString();
string[] tokens = idPath.Split(new[] { concatString }, StringSplitOptions.None);
TVIViewModel currNode = null;
SIEETreeView currTree = this;
for (int i = 0; i != tokens.Length; i++)
{
if (tokens[i] == string.Empty)
{
continue;
}
currNode = currTree.findChild(tokens[i]);
if (currNode == null)
{
return(null);
}
currNode.IsExpanded = true;
currTree = currNode.Children;
}
return(currNode);
}
public TVIViewModel(TVIModel model, TVIViewModel parent, bool lazyLoadChildren)
{
Tvim = model;
this.parent = parent;
Tvim.Depth = parent == null ? 0 : parent.Tvim.Depth + 1;
children = new SIEETreeView(null);
if (lazyLoadChildren && Tvim.IsFolder)
{
children.Add(DummyChild);
}
}
// Open the tree view according to the serialzed path.
// Expands all nodes on the way
public TVIViewModel InitializeTree(List <string> serializedPath, Type modelType)
{
if (serializedPath == null)
{
return(null);
}
SIEETreeView currentTree = this;
TVIViewModel currItem = null;
try
{
for (int i = 0; i != serializedPath.Count; i++)
{
TVIModel tvim = (TVIModel)TVIViewModel.deSerialize(serializedPath[i], modelType);
currItem = currentTree.findChild(tvim.Id);
if (currItem == null)
{
throw new Exception(tvim.DisplayName + " not found");
}
currItem.IsExpanded = true;
currItem.IsSelected = true;
currentTree = currItem.Children;
}
}
catch (Exception e)
{
string errMsg = "No items in tree view";
string title = "Error";
if (this.Count() > 0)
{
TVIModel someModel = this[0].Tvim;
errMsg = "Could not locate " + someModel.GetTypeName() + ". Reason:\n" + e.Message;
title = "Navigate to " + someModel.GetTypeName();
}
SIEEMessageBox.Show(errMsg, title, System.Windows.MessageBoxImage.Error);
}
return(currItem);
}