/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community License, Version 2.0 (the "License"); you may

  * not use this file except in compliance with the License. You may

  * obtain a copy of the License at

  *

  * http://www.osedu.org/licenses/ECL-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an "AS IS"

  * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

  * or implied. See the License for the specific language governing

  * permissions and limitations under the License.

  */

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

 import java.util.List;

 import org.kuali.student.common.ui.client.configurable.mvc.DefaultWidgetFactory;

 import org.kuali.student.common.ui.client.mvc.Callback;

 import org.kuali.student.common.ui.client.mvc.HasDataValue;

 import org.kuali.student.common.ui.client.widgets.KSDropDown;

 import org.kuali.student.common.ui.client.widgets.list.KSRadioButtonList;

 import org.kuali.student.common.ui.client.widgets.list.SelectionChangeEvent;

 import org.kuali.student.common.ui.client.widgets.list.SelectionChangeHandler;

 import org.kuali.student.common.ui.client.widgets.list.impl.KSRadioButtonListImpl;

 import org.kuali.student.common.ui.client.widgets.rules.AccessWidgetValue;

 import org.kuali.student.common.ui.client.widgets.search.KSPicker;

 import org.kuali.student.core.assembly.data.Data;

 import org.kuali.student.core.assembly.data.Metadata;

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

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

 public class GradeWidget extends Composite implements AccessWidgetValue, HasDataValue {

     private FlowPanel layout = new FlowPanel();

     KSPicker gradeTypeWidget;

     KSPicker gradeWidget = null;

     Metadata gradeMetadata;

     public GradeWidget() {

         this.initWidget(layout);

     }

     @Override

     public void initWidget(List<Metadata> fieldsMetadata) {

         layout.clear();

         gradeTypeWidget = (KSPicker) DefaultWidgetFactory.getInstance().getWidget(fieldsMetadata.get(0));

         layout.add(gradeTypeWidget);

         gradeMetadata = fieldsMetadata.get(1);

         setupHandlers();

     }

     private void setupHandlers() {

         ((KSRadioButtonList)gradeTypeWidget.getInputWidget()).addSelectionChangeHandler(new SelectionChangeHandler() {

             @Override

             public void onSelectionChange(SelectionChangeEvent event) {

                 String gradeTypeSelected = ((KSRadioButtonListImpl)event.getWidget()).getSelectedItem();

                 gradeMetadata.getInitialLookup().getParams().get(0).setDefaultValueList(null);

                 gradeMetadata.getInitialLookup().getParams().get(0).setDefaultValueString(gradeTypeSelected);

                 addGradeListWidget(true);

             }

         });

     }

     private void addGradeListWidget(boolean enabled) {

         if (gradeWidget != null) {

             layout.remove(gradeWidget);

         }

         gradeWidget = (KSPicker) DefaultWidgetFactory.getInstance().getWidget(gradeMetadata);

         ((KSDropDown)gradeWidget.getInputWidget()).setEnabled(enabled);

         layout.add(gradeWidget);

     }

         @Override

         public void addValueChangeCallback(Callback<Data.Value> callback) {

         }

         @Override

         public void setValue(Data.Value value) {

         addGradeListWidget(false);

                 gradeWidget.setValue(value);        

         }

     @Override

     public void getValue(Callback<String> doneSaveCallback) { 

     }

     @Override

     public void setValue(String id) {

     }

     @Override

     public Data.Value getValue() {

         return (gradeWidget != null ? gradeWidget.getValue() : null);

     }

 }