001    /*
002     * Copyright 2002-2007 the original author or authors.
003     * 
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not
005     * use this file except in compliance with the License. You may obtain a copy of
006     * the License at
007     * 
008     * http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012     * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
013     * License for the specific language governing permissions and limitations under
014     * the License.
015     */
016    package org.springframework.richclient.dialog.control;
017    
018    import javax.swing.DefaultSingleSelectionModel;
019    
020    /**
021     * Custom <code>SingleSelectionModel</code> implementation that allows for
022     * vetoing the selection of tabs.
023     * <p>
024     * The {@link #selectionAllowed(int)} method must return <code>true</code> if
025     * the tab at the index can be selected, or <code>false</code> if not.
026     * 
027     * @author Peter De Bruycker
028     */
029    public abstract class VetoableSingleSelectionModel extends DefaultSingleSelectionModel {
030    
031            public final void setSelectedIndex(int index) {
032                    if (selectionAllowed(index)) {
033                            super.setSelectedIndex(index);
034                    }
035            }
036    
037            protected abstract boolean selectionAllowed(int index);
038    }