/*

  * Copyright 2004-2008 the Seasar Foundation and the Others.

  *

  * Licensed under the Apache 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.apache.org/licenses/LICENSE-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.seasar.uruma.renderer.impl;

 import java.util.List;

 import org.eclipse.jface.viewers.ComboViewer;

 import org.eclipse.jface.viewers.IBaseLabelProvider;

 import org.eclipse.jface.viewers.IContentProvider;

 import org.eclipse.swt.SWT;

 import org.eclipse.swt.widgets.Combo;

 import org.seasar.uruma.component.jface.ComboComponent;

 import org.seasar.uruma.component.jface.SimpleItemComponent;

 import org.seasar.uruma.context.PartContext;

 import org.seasar.uruma.context.WidgetHandle;

 import org.seasar.uruma.viewer.ContentsHolder;

 import org.seasar.uruma.viewer.GenericLabelProvider;

 /**

  * {@link ComboViewer} のレンダリングを行うクラスです。<br />

  * 

  * @author bskuroneko

  */

 public class ComboViewerRenderer extends

         AbstractViewerRenderer<ComboComponent, ComboViewer, Combo> {

     /*

      * @see org.seasar.uruma.renderer.impl.AbstractRenderer#getDefaultStyle()

      */

     @Override

     protected int getDefaultStyle() {

         return SWT.SIMPLE;

     }

     /*

      * @see org.seasar.uruma.renderer.impl.AbstractViewerRenderer#doRenderViewer(org.seasar.uruma.component.jface.CompositeComponent,

      *      org.eclipse.jface.viewers.Viewer)

      */

     @Override

     protected void doRenderViewer(final ComboComponent uiComponent,

             final ComboViewer viewer) {

         setupItems(uiComponent, viewer);

     }

     @Override

     protected void doRenderAfter(final ComboViewer viewer,

             final ComboComponent uiComponent, final WidgetHandle parent,

             final PartContext context) {

         setupItems(uiComponent, viewer);

     }

     /*

      * @see org.seasar.uruma.renderer.impl.AbstractWidgetRenderer#getWidgetType()

      */

     @Override

     protected Class<Combo> getWidgetType() {

         return Combo.class;

     }

     /*

      * @see org.seasar.uruma.renderer.impl.AbstractViewerRenderer#getViewerType()

      */

     @Override

     protected Class<ComboViewer> getViewerType() {

         return ComboViewer.class;

     }

     private void setupItems(final ComboComponent comboComponent,

             final ComboViewer viewer) {

         List<SimpleItemComponent> itemList = comboComponent.getItems();

         IContentProvider provider = viewer.getContentProvider();

         if (provider != null && provider instanceof ContentsHolder) {

             ContentsHolder holder = ContentsHolder.class.cast(provider);

             holder.setContents(itemList);

         } else {

             for (SimpleItemComponent simpleItemComponent : itemList) {

                 viewer.add(simpleItemComponent);

             }

         }

         viewer.setInput(itemList);

     }

     /*

      * @see org.seasar.uruma.renderer.impl.AbstractViewerRenderer#getDefaultLabelProvider()

      */

     @Override

     protected IBaseLabelProvider getDefaultLabelProvider() {

         return new GenericLabelProvider();

     }

 }