odk/examples/java/Inspector/HideableMutableTreeNode.java

   1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 import javax.swing.tree.*;
  21
  22 /**
  23  * <code>HideableMutableTreeNode</code> is a <code>DefaultMutableTreeNode</code>
  24  * implementation that works with <code>HideableTreeModel</code>.
  25  */
  26 public class HideableMutableTreeNode extends DefaultMutableTreeNode {
  27     /**
  28      * The node is visible flag.
  29      */
  30     private boolean bIsvisible = true;
  31         private static final String SDUMMY = "Dummy";
  32
  33
  34     /**
  35      * Creates a tree node that has no parent and no children, but which
  36      * allows children.
  37      */
  38     public HideableMutableTreeNode() {
  39             super();
  40     }
  41
  42     /**
  43      * Creates a tree node with no parent, no children, but which allows
  44      * children, and initializes it with the specified user object.
  45      *
  46      * @param  _userObject - an Object provided by the user that
  47      *                      constitutes the node's data
  48      */
  49     public HideableMutableTreeNode(Object _userObject) {
  50             super(_userObject);
  51     }
  52
  53     /**
  54      * Creates a tree node with no parent, no children, initialized with the
  55      * specified user object, and that allows children only if specified.
  56      *
  57      * @param  _userObject     - an Object provided by the user that describes the node's data
  58      * @param  _ballowsChildren - if true, the node is allowed to have childnodes -- otherwise, it is always a leaf node
  59      */
  60     public HideableMutableTreeNode(Object _userObject, boolean _ballowsChildren) {
  61             super(_userObject, _ballowsChildren);
  62     }
  63
  64     /**
  65      * Checks if the node is visible.
  66      *
  67      * @return  true if the node is visible, else false
  68      */
  69     public boolean isVisible() {
  70             return this.bIsvisible;
  71     }
  72
  73     /**
  74      * Sets if the node is visible.
  75      *
  76      * @param  _bIsVisible true if the node is visible, else false
  77      */
  78     public void setVisible(boolean _bIsVisible) {
  79             this.bIsvisible = _bIsVisible;
  80     }
  81
  82
  83         public void addDummyNode(){
  84             removeDummyNode();
  85             DefaultMutableTreeNode oDefaultMutableTreeNode = new DefaultMutableTreeNode(SDUMMY);
  86             add(oDefaultMutableTreeNode);
  87
  88         }
  89
  90
  91         public boolean removeDummyNode(){
  92             boolean breturn = false;
  93             if (getChildCount() == 1){
  94                 DefaultMutableTreeNode oDefaultMutableTreeNode = (DefaultMutableTreeNode) getChildAt(0);
  95                 if (oDefaultMutableTreeNode != null){
  96                     if (oDefaultMutableTreeNode.getUserObject().equals(SDUMMY)){
  97                         remove(0);
  98                         breturn = true;
  99                     }
 100                 }
 101             }
 102             return breturn;
 103         }
 104
 105 }
 106 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */