/**
    * 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.lu.ui.tools.client.widgets;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.kuali.student.common.ui.client.mvc.Callback;
  import org.kuali.student.common.ui.client.widgets.KSButton;
  import org.kuali.student.common.ui.client.widgets.KSLabel;
  import org.kuali.student.common.ui.client.widgets.KSLightBox;
  import org.kuali.student.common.ui.client.widgets.layout.VerticalFlowPanel;
  
  import com.google.gwt.event.dom.client.ClickEvent;
  import com.google.gwt.event.dom.client.ClickHandler;
  import com.google.gwt.user.client.ui.HorizontalPanel;
  import com.google.gwt.user.client.ui.Panel;
  import com.google.gwt.user.client.ui.SimplePanel;
  
  public class WarningDialog {
      
      private KSLightBox dialog = new KSLightBox();
      private KSLabel titleLabel = null;
      private KSLabel messageLabel = null;
      private KSLabel questionLabel = null;
      private VerticalFlowPanel layout = new VerticalFlowPanel();
      private List<Callback<Boolean>> confirmationCallbacks = new ArrayList<Callback<Boolean>>();
      private KSButton affirmativeButton;
      private KSButton negativeButton;
  
      public WarningDialog(String title, String message, String question,
              String affirmativeChoice, String negativeChoice) {
          titleLabel = new KSLabel(title);
          messageLabel = new KSLabel(message);
          questionLabel = new KSLabel(question);
          affirmativeButton = new KSButton(affirmativeChoice);
          negativeButton = new KSButton(negativeChoice);
          
          layout.add(titleLabel);
          layout.add(createSpacerPanel("0px","20px"));
          layout.add(messageLabel);
          layout.add(createSpacerPanel("0px","50px"));
          layout.add(questionLabel);
          
          HorizontalPanel buttonsPanel = new HorizontalPanel();
          buttonsPanel.add(affirmativeButton);
          buttonsPanel.add(createSpacerPanel("10px", "0px"));
          buttonsPanel.add(negativeButton);
          layout.add(createSpacerPanel("0px","5px"));
          layout.add(buttonsPanel);
          
          affirmativeButton.addClickHandler(new ClickHandler() {
              @Override
              public void onClick(ClickEvent event) {
                  if (confirmationCallbacks != null) {
                      for (Callback<Boolean> confirmationCallback : confirmationCallbacks) {
                          confirmationCallback.exec(Boolean.TRUE);
                      }
                  }
              }
          });
          negativeButton.addClickHandler(new ClickHandler() {
              @Override
              public void onClick(ClickEvent event) {
                  if (confirmationCallbacks != null) {
                      for (Callback<Boolean> confirmationCallback : confirmationCallbacks) {
                          confirmationCallback.exec(Boolean.FALSE);
                      }
                  }
              }
          });
          dialog.setWidget(layout);
      }
      
      private Panel createSpacerPanel(String width, String height) {
          Panel spacerPanel = new SimplePanel();
          spacerPanel.setWidth(width);
          spacerPanel.setHeight(height);
          return spacerPanel;
      }
      
      public void show() {
          dialog.show();
      }
      
      public void hide() {
         dialog.hide();
     }
     
     public void addConfirmationCallback(Callback<Boolean> confirmationCallback) {
         confirmationCallbacks.add(confirmationCallback);
     }
     
 }