internal void RefreshWhenSave(CategoryViewModel viewModel)
{
if (viewModel.Model.Parent == null)
{
this.CategoryList.Add(viewModel);
}
else
{
TreeNodeModel parent = Tree.Find(this.CategoryList,
(e) => (e as CategoryViewModel).Model.Id == (viewModel as CategoryViewModel).Model.Parent.Id) as TreeNodeModel;
parent.AddChild(viewModel);
}
}
private void SetupAutoAdd(TreeNodeModel node)
{
node.PropertyChanged += (s, e) =>
{
if (node.IsExpanded && node.Children.Count == 0)
{
for (var c = 0; c < 20; c++)
{
var ch = new TreeNodeModel
{
Name = "Auto-added child " + c
};
SetupAutoAdd(ch);
node.AddChild(ch);
}
TotalItems += 20;
RaisePropertyChanged(nameof(TotalItems));
}
};
}
void Populate(TreeNodeModel node, int levels)
{
if (levels == 0)
{
return;
}
for (var c = 0; c < 10; c++)
{
var ch = new TreeNodeModel
{
Name = "Child " + c,
IsExpanded = levels > 1
};
if (levels == 1)
{
SetupAutoAdd(ch);
}
node.AddChild(ch);
Populate(ch, levels - 1);
}
}
public static ObservableCollection <TreeNodeModel> BuildTree(IEnumerable <Category> col)
{
ObservableCollection <TreeNodeModel> tree = new ObservableCollection <TreeNodeModel>();
if (col != null && col.Count() > 0)
{
List <CategoryViewModel> list = (from item in col
select new CategoryViewModel(item))
.ToList();
Queue <TreeNodeModel> queue = new Queue <TreeNodeModel>();
foreach (var item in list)
{
queue.Enqueue(item);
}
while (queue.Count > 0)
{
CategoryViewModel current = queue.Dequeue() as CategoryViewModel;
if (string.IsNullOrWhiteSpace(current.Model.ParentId))
{
tree.Add(current);
}
else
{
TreeNodeModel parent = Tree.Find(tree,
(e) => (e as CategoryViewModel).Model.Id == current.Model.ParentId) as TreeNodeModel;
if (parent == null)
{
queue.Enqueue(current);
}
else
{
parent.AddChild(current);
}
}
}
}
return(tree);
}
