public override bool Update(TreeViewElement <T> treeViewElement)
{
if (View.AspectGetter != treeViewElement.AspectGetter)
{
View.AspectGetter = treeViewElement.AspectGetter;
}
if (View.TreeBuilder != treeViewElement.TreeBuilder)
{
View.TreeBuilder = treeViewElement.TreeBuilder;
}
if (Prev.Root != treeViewElement.Root)
{
var adds = treeViewElement.Root.Except(View.Objects, treeViewElement.EqualityComparer);
foreach (var todo in adds)
{
View.AddObject(todo);
}
var removes = View.Objects.Except(treeViewElement.Root, treeViewElement.EqualityComparer);
foreach (var todo in removes)
{
var remove = View.Objects.Where(obj => obj == todo).ToArray();
if (remove.Length > 0)
{
foreach (var item in remove)
{
View.Remove(item);
}
}
}
}
return(base.Update(treeViewElement));;
}
public State(TreeViewElement <T> element) : base(element, new TreeView <T>())
{
View.AspectGetter = element.AspectGetter;
View.TreeBuilder = element.TreeBuilder;
View.ObjectActivated += (args) =>
{
Prev.ObjectActivated?.Invoke(args.ActivatedObject);
View.RefreshObject(args.ActivatedObject);
};
View.SelectionChanged += (obj, e) =>
{
Prev.Selected?.Invoke(e.NewValue);
};
foreach (var value in element.Root)
{
View.AddObject(value);
}
}
