private void CreateViewModelAndAddToCollections(T treeItem)
{
if (modelDictionary.ContainsKey(treeItem.Identifier.Id))
{
return;
}
IIdentityTreeItemViewModel <T> vm = CreateViewModel(treeItem);
vm.Expanded += OnViewModelExpanded;
vm.Selected += OnViewModelSelected;
treeItem.ParentChanged += OnTreeItemParentChanged;
modelDictionary.Add(treeItem.Identifier.Id, treeItem);
viewModelDictionary.Add(treeItem.Identifier.Id, vm);
allNodes.Add(vm);
if (treeItem.Parent != null)
{
IIdentityTreeItemViewModel <T> parentVM = viewModelDictionary[treeItem.Parent.Identifier.Id];
vm.Parent = parentVM;
parentVM.AddChild(vm);
}
foreach (var item in treeItem.Children)
{
CreateViewModelAndAddToCollections(item);
}
}
private void OnTreeItemParentChanged(object sender, IdentityTreeItemParentChangedEventArgs <T> e)
{
IIdentityTreeItem <T> treeItem = sender as IIdentityTreeItem <T>;
IIdentityTreeItemViewModel <T> vm = viewModelDictionary[treeItem.Identifier.Id];
if (e.OldParent != null)
{
IIdentityTreeItemViewModel <T> oldParentVM = viewModelDictionary[e.OldParent.Identifier.Id];
oldParentVM.RemoveChild(vm.Identifier);
}
if (e.NewParent != null)
{
IIdentityTreeItemViewModel <T> newParentVM = viewModelDictionary[e.NewParent.Identifier.Id];
newParentVM.AddChild(vm);
}
}
