CategoryExplorerTree


1   /*
2    * Copyright 1999-2005 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.log4j.lf5.viewer.categoryexplorer;
17  
18  import javax.swing.*;
19  import javax.swing.event.TreeModelEvent  ;
20  import javax.swing.tree.TreePath  ;
21  import java.awt.event.MouseEvent  ;
22  
23  /**
24   * CategoryExplorerTree
25   *
26   * @author Michael J. Sikorsky
27   * @author Robert Shaw
28   * @author Brent Sprecher
29   * @author Brad Marlborough
30   */
31  
32  // Contributed by ThoughtWorks Inc.
33  
34  public class CategoryExplorerTree extends JTree {
35    //--------------------------------------------------------------------------
36    //   Constants:
37    //--------------------------------------------------------------------------
38  
39    //--------------------------------------------------------------------------
40    //   Protected Variables:
41    //--------------------------------------------------------------------------
42    protected CategoryExplorerModel _model;
43    protected boolean _rootAlreadyExpanded = false;
44  
45    //--------------------------------------------------------------------------
46    //   Private Variables:
47    //--------------------------------------------------------------------------
48  
49    //--------------------------------------------------------------------------
50    //   Constructors:
51    //--------------------------------------------------------------------------
52  
53    /**
54     * Construct a CategoryExplorerTree with a specific model.
55     */
56    public CategoryExplorerTree(CategoryExplorerModel model) {
57      super(model);
58  
59      _model = model;
60      init();
61    }
62  
63    /**
64     * Construct a CategoryExplorerTree and create a default CategoryExplorerModel.
65     */
66    public CategoryExplorerTree() {
67      super();
68  
69      CategoryNode rootNode = new CategoryNode("Categories");
70  
71      _model = new CategoryExplorerModel(rootNode);
72  
73      setModel(_model);
74  
75      init();
76    }
77  
78    //--------------------------------------------------------------------------
79    //   Public Methods:
80    //--------------------------------------------------------------------------
81  
82    public CategoryExplorerModel getExplorerModel() {
83      return (_model);
84    }
85  
86    public String   getToolTipText(MouseEvent   e) {
87  
88      try {
89        return super.getToolTipText(e);
90      } catch (Exception   ex) {
91        return "";
92      }
93  
94    }
95  
96    //--------------------------------------------------------------------------
97    //   Protected Methods:
98    //--------------------------------------------------------------------------
99  
100   protected void init() {
101     // Put visible lines on the JTree.
102     putClientProperty("JTree.lineStyle", "Angled");
103 
104     // Configure the Tree with the appropriate Renderers and Editors.
105 
106     CategoryNodeRenderer renderer = new CategoryNodeRenderer();
107     setEditable(true);
108     setCellRenderer(renderer);
109 
110     CategoryNodeEditor editor = new CategoryNodeEditor(_model);
111 
112     setCellEditor(new CategoryImmediateEditor(this,
113         new CategoryNodeRenderer(),
114         editor));
115     setShowsRootHandles(true);
116 
117     setToolTipText("");
118 
119     ensureRootExpansion();
120 
121   }
122 
123   protected void expandRootNode() {
124     if (_rootAlreadyExpanded) {
125       return;
126     }
127     _rootAlreadyExpanded = true;
128     TreePath   path = new TreePath  (_model.getRootCategoryNode().getPath());
129     expandPath(path);
130   }
131 
132   protected void ensureRootExpansion() {
133     _model.addTreeModelListener(new TreeModelAdapter() {
134       public void treeNodesInserted(TreeModelEvent   e) {
135         expandRootNode();
136       }
137     });
138   }
139 
140   //--------------------------------------------------------------------------
141   //   Private Methods:
142   //--------------------------------------------------------------------------
143 
144   //--------------------------------------------------------------------------
145   //   Nested Top-Level Classes or Interfaces:
146   //--------------------------------------------------------------------------
147 
148 }
149 
150 
151 
152 
153 
154 
155
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