TreeList is scrolled to a focused node each time a new node is added if TreeList is sorted

the problem still exists in 15.2.4

Hello Jasom,

I have reproduced this behavior. I sent this ticket to our developers so that they can continue investigating this issue.

Hello,

We have investigated this issue and found that currently TreeListControl operates in the same manner as GridControl. Namely, the scrollbar position does not change when new data is added. Only the scrollbar size is changed. This is correct behavior. I have created a project to illustrate this behavior. If you are talking about different behavior, please modify my project to illustrate it.
I am looking forward to your response.

Hello,

I reproduced the problem in your example, however it only happened in the grid, not the treelist. I modified some code.
It seem related to the sorting. The code generate some child nodes, at first the grid grow and didn't jump to the focus row. However if I reverse sort the ID column, whenever I scoll, it jump to the focus row. I attached the video for your reference.
public Main() {
           InitializeComponent();
           Random ran = new Random();
           recordBindingSource.DataSource = DataHelper.GetData(100);
           gridControl1.DataSource = recordBindingSource;
           Timer timer = new Timer();
           timer.Interval = 300;
           timer.Tick += (s, e) => {
               int r = ran.Next(1, 3);
               if (r == 1)
               {
                   // generate parent node
                   recordBindingSource.Add(new Record() { ID = recordBindingSource.Count });
               }
               else
               {
                   recordBindingSource.Add(new Record() { ID = recordBindingSource.Count, ParentID = ran.Next(1, recordBindingSource.Count-1)});
               }
           };
           timer.Start();
           treeList1.TopVisibleNodeIndexChanged += treeList1_TopVisibleNodeIndexChanged;
       }