/**

  * 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.common.ui.client.widgets.search;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

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

 import org.kuali.student.common.ui.client.widgets.KSButtonAbstract.ButtonStyle;

 import org.kuali.student.common.ui.client.widgets.layout.HorizontalBlockFlowPanel;

 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.Composite;

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

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

 public class LinkPanel extends Composite{

         private Map<Enum<?>, PanelInfo> panels = new HashMap<Enum<?>, PanelInfo>();

         private SimplePanel container = new SimplePanel();

         private class PanelInfo extends Composite{

                 private VerticalFlowPanel layout = new VerticalFlowPanel();

                 private HorizontalBlockFlowPanel linkPanel = new HorizontalBlockFlowPanel();

                 private Enum<?> key;

                 private Widget content;

                 private List<NavLink> links = new ArrayList<NavLink>();

                 private class NavLink{

                         protected String linkName;

                         protected Enum<?> linkToKey;

                 }

                 public PanelInfo(Enum<?> key, Widget content){

                         this.key = key;

                         this.content = content;

                         layout.add(content);

                         layout.add(linkPanel);

                         this.initWidget(layout);

                 }

                 public KSButton addLink(String linkText, final Enum<?> linkedPanelKey){

                         NavLink link = new NavLink();

                         link.linkName = linkText;

                         link.linkToKey = linkedPanelKey;

                         links.add(link);

                         //KSLabel linkWidget = new KSLabel(linkText);

                         KSButton linkWidget = new KSButton(linkText, ButtonStyle.DEFAULT_ANCHOR);

                         linkWidget.addClickHandler(new ClickHandler(){

                                 @Override

                                 public void onClick(ClickEvent event) {

                                         Widget newPanel = panels.get(linkedPanelKey);

                                         container.setWidget(newPanel);

                                 }

                         });

                         linkPanel.add(linkWidget);

                         return linkWidget;

                 }

         }

         public LinkPanel(Enum<?> defaultPanelKey, Widget content){

                 PanelInfo info = new PanelInfo(defaultPanelKey, content);

                 panels.put(defaultPanelKey, info);

                 container.setWidget(info);

                 this.initWidget(container);

         }

         public void addPanel(Enum<?> panelKey, Widget content){

                 PanelInfo info = new PanelInfo(panelKey, content);

                 panels.put(panelKey, info);

         }

         public KSButton addLinkToPanel(Enum<?> panelKey, String linkText, Enum<?> linkedPanelKey){

                 PanelInfo info = panels.get(panelKey);

                 return info.addLink(linkText, linkedPanelKey);

         }

 }