package org.litesoft.GWT.client.widgets.datatables;

import java.util.*;

import com.google.gwt.event.logical.shared.*;

public class JoinedTableController<T> implements SelectionHandler<T>
{
    private final JoinedTableTop<T> mTopTable;
    
    public JoinedTableController(JoinedTableTop<T> pTopTable, RegularTable<T> pBottomTable)
    {
        mTopTable = pTopTable;
        pBottomTable.addSelectionHandler(this);
        Set<T> selectedValues = pBottomTable.getSelectedValues();
        onSelectionImpl((selectedValues.size() > 0) ? selectedValues.iterator().next() : null);
    }
    
    public void onSelection(SelectionEvent<T> pEvent)
    {
        onSelectionImpl(pEvent.getSelectedItem());
    }
    
    private void onSelectionImpl(T pSelectedItem)
    {
        mTopTable.setValue(pSelectedItem);
    }
}