private void ListScrollViewer_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
prev_y = e.GetPosition(this).Y;
drag_action_state = DragActionState.ReadyDrag;
Log.Debug($"{drag_action_state}", "ListScrollViewer_PreviewMouseLeftButtonDown");
}
private void ListScrollViewer_MouseUp(object sender, MouseButtonEventArgs e)
{
drag_action_state = DragActionState.Idle;
Log.Debug($"{drag_action_state}", "ListScrollViewer_MouseUp");
}
