/**

  * 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.impl;

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

 import com.google.gwt.event.dom.client.ClickHandler;

 import com.google.gwt.event.dom.client.MouseOutHandler;

 import com.google.gwt.event.dom.client.MouseOverHandler;

 import com.google.gwt.event.shared.HandlerRegistration;

 import com.google.gwt.user.client.DOM;

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

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

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

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

 public class KSButtonImpl extends KSButtonAbstract{

         private static class SpanPanel extends ComplexPanel{

                 public SpanPanel(){

                         setElement(DOM.createSpan());

                 }

                   /**

                    * Adds a new child widget to the panel.

                    *

                    * @param w the widget to be added

                    */

                   @Override

                   public void add(Widget w) {

                     add(w, getElement());

                   }

                   /**

                    * Inserts a widget before the specified index.

                    *

                    * @param w the widget to be inserted

                    * @param beforeIndex the index before which it will be inserted

                    * @throws IndexOutOfBoundsException if <code>beforeIndex</code> is out of

                    *           range

                    */

                   public void insert(Widget w, int beforeIndex) {

                     insert(w, getElement(), beforeIndex, true);

                   }

         }

         private SpanPanel panel = new SpanPanel();

         private Anchor anchor;

         private InlineLabel disabledLabel = new InlineLabel();

         private boolean enabled = true;

         private ButtonStyle currentStyle;

         public boolean isEnabled() {

                 return enabled;

         }

         public void setEnabled(boolean enabled) {

                 anchor.setEnabled(enabled);

                 if(enabled){

                         panel.remove(disabledLabel);

                         panel.add(anchor);

                 }

                 else{

                         panel.remove(anchor);

                         panel.add(disabledLabel);

                 }

         }

         @Override

         public HandlerRegistration addClickHandler(ClickHandler handler) {

                 return anchor.addClickHandler(handler);

         }

         @Override

         public void setText(String text){

                 anchor.setText(text);

                 disabledLabel.setText(text);

         }

         @Override

         public HandlerRegistration addMouseOverHandler(MouseOverHandler handler) {

                 return anchor.addMouseOverHandler(handler);

         }

         @Override

         public HandlerRegistration addMouseOutHandler(MouseOutHandler handler) {

                 return anchor.addMouseOutHandler(handler);

         }

         @Override

         public void init(String text) {

                 init(text, ButtonStyle.PRIMARY);

         }

         @Override

         public void init(String text, ButtonStyle style) {

                 this.currentStyle = style;

                 disabledLabel.setText(text);

                 anchor = new Anchor();

                 if(currentStyle.getStyle() != null){

                         disabledLabel.setStyleName(currentStyle.getStyle());

                         anchor.setStyleName(currentStyle.getStyle());

                 }

                 String disabledStyle = currentStyle.getDisabledStyle();

                 if(disabledStyle == null){

                         disabledLabel.addStyleName("disabled");

                 }

                 else{

                         disabledLabel.setStyleName(disabledStyle);

                 }

                 anchor.setText(text);

                 anchor.setHref("javascript:return false;");

                 panel.add(anchor);

                 anchor.setTabIndex(0);

                 this.initWidget(panel);

         }

         @Override

     public void addStyleName(String style) {

         anchor.addStyleName(style);

         disabledLabel.addStyleName(style);

     }

     @Override

     public void removeStyleName(String style) {

         anchor.removeStyleName(style);

         disabledLabel.removeStyleName(style);        

     }

     @Override

     public void setStyleName(String style) {

         anchor.setStyleName(style);

         disabledLabel.setStyleName(style);        

     }

     @Override

         public void init() {

                 init("", ButtonStyle.PRIMARY);

         }

         @Override

         public void init(String text, ClickHandler handler) {

                 init(text, ButtonStyle.PRIMARY);

                 anchor.addClickHandler(handler);

         }

     public void init(String text, ButtonStyle style, ClickHandler handler) {

         init(text, style);

         anchor.addClickHandler(handler);

     }

 }