TableView - keep selection

[ghost]

I'm looking for any suggestion on how to keep the full-row selection of a table-view as rows are added to it from another thread. Current behavior is the new row added to the table becomes selected.

[tznind]

If you are simply adding rows to the table then the current selection will not change. Here is some example code and a gif that shows its behaviour. Make sure you use Application.MainLoop.Invoke as in the code below.

using System.Data;
using Terminal.Gui;


Application.Init();

var w = new Window();
var rand = new Random();
var dt = new DataTable();
dt.Columns.Add("Col1");

dt.Rows.Add(rand.Next());

var tv = new TableView()
{
    Width = Dim.Fill(),
    Height = Dim.Fill(),
    Table = dt,
    FullRowSelect = true,
};

Task.Run(async ()=>
{
    while(true)
    {
        await Task.Delay(2000);
        Application.MainLoop.Invoke(()=>
        {
            dt.Rows.Add(rand.Next());
            tv.Update();
        });
    }

});

w.Add(tv);

Application.Run(w);

Application.Shutdown();

That said you can still change the SelectedRow property explicitly e.g.

var currentRow = tv.SelectedRow;
// Do something
tv.SelectedRow = currentRow;

If you are inserting the row at the top of the table you can just adjust SelectedRow down again e.g.

var row = dt.NewRow();
row[0] = rand.Next();
dt.Rows.InsertAt(row,0);

tv.Update();
// because we are inserting at beginning we need
// to shift selection down
tv.SelectedRow++;