/*

  * 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.viewer;

 import org.eclipse.jface.viewers.DoubleClickEvent;

 import org.eclipse.jface.viewers.IDoubleClickListener;

 import org.eclipse.jface.viewers.IStructuredSelection;

 import org.eclipse.jface.viewers.TreeViewer;

 import org.eclipse.swt.widgets.Composite;

 import org.eclipse.swt.widgets.Tree;

 /**

  * 機能拡張した {@link TreeViewer} です。<br />

  * 

  * @author y-komori

  */

 public class UrumaTreeViewer extends TreeViewer implements IDoubleClickListener {

     /**

      * {@link UrumaTreeViewer} を構築します。<br />

      * 

      * @param parent

      *            親 {@link Composite}

      */

     public UrumaTreeViewer(final Composite parent) {

         super(parent);

         init();

     }

     /**

      * {@link UrumaTreeViewer} を構築します。<br />

      * 

      * @param parent

      *            親 {@link Composite}

      * @param style

      *            スタイル値

      */

     public UrumaTreeViewer(final Composite parent, final int style) {

         super(parent, style);

         init();

     }

     /**

      * {@link UrumaTreeViewer} を構築します。<br />

      * 

      * @param tree

      *            {@link Tree} オブジェクト

      */

     public UrumaTreeViewer(final Tree tree) {

         super(tree);

         init();

     }

     protected void init() {

         addDoubleClickListener(this);

     }

     /*

      * @see org.eclipse.jface.viewers.IDoubleClickListener#doubleClick(org.eclipse.jface.viewers.DoubleClickEvent)

      */

     public void doubleClick(final DoubleClickEvent event) {

         IStructuredSelection selection = (IStructuredSelection) event

                 .getSelection();

         Object selected = selection.getFirstElement();

         // ノードの展開状態を反転させる

         boolean expandedState = getExpandedState(selected);

         setExpandedState(selected, !expandedState);

     }

 }