/**
    * 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.lo;
  
  import java.util.List;
  
  import org.kuali.student.common.assembly.data.Data;
  import org.kuali.student.common.ui.client.widgets.KSLabel;
  import org.kuali.student.common.ui.client.widgets.KSTextArea;
  import org.kuali.student.common.ui.client.widgets.layout.VerticalFlowPanel;
  import org.kuali.student.common.ui.client.widgets.list.HasSelectionChangeHandlers;
  import org.kuali.student.common.ui.client.widgets.list.SelectionChangeEvent;
  import org.kuali.student.common.ui.client.widgets.list.SelectionChangeHandler;
  import org.kuali.student.lum.lo.dto.LoCategoryInfo;
  
  import com.google.gwt.event.dom.client.KeyUpEvent;
  import com.google.gwt.event.dom.client.KeyUpHandler;
  import com.google.gwt.event.logical.shared.ValueChangeEvent;
  import com.google.gwt.event.logical.shared.ValueChangeHandler;
  import com.google.gwt.event.shared.HandlerRegistration;
  import com.google.gwt.user.client.Window;
  import com.google.gwt.user.client.ui.HorizontalPanel;
  import com.google.gwt.user.client.ui.TextArea;
  
  /**
   * This is a description of what this class does - hjohnson don't forget to fill this in. 
   * 
   * @author Kuali Student Team (kuali-student@googlegroups.com)
   *
   */
  public class LOPicker extends HorizontalPanel implements HasSelectionChangeHandlers{
  	KSLabel countLabel = new KSLabel();
      KSTextArea loTextArea = new KSTextArea(countLabel, 250);
      VerticalFlowPanel vp = new VerticalFlowPanel();
      LOCategoryBuilder loCategoryBuilder;
      Data metaInfoData; // temporary storage of metaInfo data this is needed when LO is updated
      public LOPicker(String messageGroup, String type, String state, String loRepoKey) {
          super();
          loCategoryBuilder = new LOCategoryBuilder(messageGroup, type, state, loRepoKey);
          loTextArea.removeStyleName("ks-form-module-elements");
          loTextArea.addStyleName("KS-LOTextArea");
          countLabel.addStyleName("ks-form-module-elements-help-text");
          countLabel.addStyleName("loText-count-label");
          vp.add(loTextArea);
          vp.add(countLabel);
          super.add(vp);
          super.add(loCategoryBuilder);
          
          loTextArea.addValueChangeHandler(new ValueChangeHandler<String>(){
  			public void onValueChange(ValueChangeEvent<String> event) {
  				fireChangeEvent();
  			}        	
          });
          
          loCategoryBuilder.addValueChangeHandler(new ValueChangeHandler<List<LoCategoryInfo>>(){
  			public void onValueChange(
  					ValueChangeEvent<List<LoCategoryInfo>> event) {
  				fireChangeEvent();
  			}        	
          });
      }
      public void setLOCategories(List<LoCategoryInfo> categories){
          loCategoryBuilder.setValue(categories);
      }
      public List<LoCategoryInfo> getLoCategories(){
          return loCategoryBuilder.getValue();
      }
      public String getLOText(){
          return loTextArea.getText();
      }
      public void setLOText(String value){
          loTextArea.setText(value);
      }
      public Data getMetaInfoData() {
          return metaInfoData;
      }
      public void setMetaInfoData(Data metaInfoData) {
          this.metaInfoData = metaInfoData;
      }
  	
      @Override
  	public HandlerRegistration addSelectionChangeHandler(SelectionChangeHandler handler) {
      	return addHandler(handler, SelectionChangeEvent.getType());
      }
      
      public boolean hasChangeHandler(){
     	return this.getHandlerCount(SelectionChangeEvent.getType()) > 0;
     }
 	
     private void fireChangeEvent(){
     	SelectionChangeEvent.fire(this);
     }
 }