public int getKeyboardSelectedRowInView() {
        return KeyboardSelectionPolicy.DISABLED == keyboardSelectionPolicy
                ? -1
                : state.getKeyboardSelectedRow();
    }
Get the index of the keyboard selected row relative to the page start as
it appears in the view, regardless of whether or not there is a pending
change.

@return the row index, or -1 if disabled
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/HasDataPresenter.java