001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.contrib.tree.model;
016    
017    import java.util.Set;
018    
019    /**
020     * @author ceco
021     */
022    
023    public interface ITreeStateModel
024    {
025    
026        Set getExpandSelection();
027    
028        /*
029         * Return the selected node unique key
030         */
031        Object getSelectedNode();
032    
033        void setSelectedNode(Object objUniqueKey);
034    
035        void expand(Object objUniqueKey);
036    
037        void expandPath(Object objUniqueKey);
038    
039        void collapse(Object objUniqueKey);
040    
041        void collapsePath(Object objUniqueKey);
042    
043        boolean isUniqueKeyExpanded(Object objUniqueKey);
044    
045        void resetState();
046    }