/**

  * 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.util.DebugIdUtils;

 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);

     }

     @Override

     protected void onEnsureDebugId(String baseID) {

         super.onEnsureDebugId(baseID);

         if (anchor != null) {

             anchor.ensureDebugId(DebugIdUtils.createWebDriverSafeDebugId(baseID + "-anchor"));

         }

     }

 }