XPages : Column Checkbox

I have a Viewpanel with a Checkbox in the first column.

Now I’m doing a partial refresh on this view with every “KeyDown” in a Textfield, to have a dynamic calculation of the “Key” Value of the view. (Similar to the Address Book Picker in a normal Mail) → ‘Find names beginning with…’

My question is, how can I store the selection in the view, so that they stay checked after a partial refresh on the same view?