This is tracked in the Data Source /Selected Row(s)
So you can drag either Selected Row(s) or a sub item (specific value field) to your target and it will be the value of your selection on your widget (true for any widget with an infotable data source, tree, grid, combo box)
Hii, What my requirement is, in left side, i have to create tree model.. Whenever we click each node in tree, the respective file should be load in right side? I don't know how to create a tree model.. Can you help me to do that?