package org.kuali.student.lum.common.client.widgets;

 import com.google.gwt.user.client.ui.ListBox;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 /**

  * Dropdown list components. Extends ListBox to add useful methods and support for underlying model.

  * Each item in dropdown list is associated with corresponding model item.

  *

  * @author Igor

  */

 public class DropdownList extends ListBox {

     /**

      * Components model.

      */

     private Map<String, Integer> model = new HashMap<String, Integer>();

     /**

      * Selected index.

      */

     private Integer index = 0;

     public DropdownList() {

     }

     public DropdownList(List<String> list) {

         for (String s : list) {

             addItem(s);

         }

     }

     @Override

     public void addItem(String value) {

         model.put(value, index++);

         super.addItem(value);

     }

     public void setSelectedItem(String value) {

         if (model.get(value) == null) {

             setSelectedIndex(0);

         } else {

             setSelectedIndex(model.get(value));

         }

     }

     public String getSelectedValue() {

         return getValue(getSelectedIndex());

     }

     public void setList(List<String> relationship) {

         for (String s : relationship) {

             addItem(s);

         }

     }

     public void reset() {

         setSelectedIndex(0);

     }

 }