// This Source Code is in the Public Domain per: http://unlicense.org
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 );
    }

    @Override
    public void onSelection( SelectionEvent<T> pEvent )
    {
        onSelectionImpl( pEvent.getSelectedItem() );
    }

    private void onSelectionImpl( T pSelectedItem )
    {
        mTopTable.setValue( pSelectedItem );
    }
}