1   /****************************************************************************
2    * This demo file is part of yFiles for Java 2.14.
3    * Copyright (c) 2000-2017 by yWorks GmbH, Vor dem Kreuzberg 28,
4    * 72070 Tuebingen, Germany. All rights reserved.
5    * 
6    * yFiles demo files exhibit yFiles for Java functionalities. Any redistribution
7    * of demo files in source code or binary form, with or without
8    * modification, is not permitted.
9    * 
10   * Owners of a valid software license for a yFiles for Java version that this
11   * demo is shipped with are allowed to use the demo source code as basis
12   * for their own yFiles for Java powered applications. Use of such programs is
13   * governed by the rights and conditions as set out in the yFiles for Java
14   * license agreement.
15   * 
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27   ***************************************************************************/
28  package demo.view.hierarchy;
29  
30  import y.view.Graph2D;
31  import y.view.hierarchy.DefaultNodeChangePropagator;
32  import y.view.hierarchy.HierarchyJTree;
33  import y.view.hierarchy.HierarchyManager;
34  import y.view.hierarchy.HierarchyTreeModel;
35  import y.view.hierarchy.HierarchyTreeTransferHandler;
36  
37  import javax.swing.JScrollPane;
38  import javax.swing.JSplitPane;
39  import javax.swing.JTree;
40  import java.awt.BorderLayout;
41  import java.awt.Dimension;
42  import java.awt.EventQueue;
43  import java.util.Locale;
44  
45  /**
46   * This demo shows how to use class {@link y.view.hierarchy.HierarchyJTree} to display the hierarchical structure.
47   *
48   * HierarchyJTree provides a different view on the graph structure, as well as (optionally) navigational actions
49   * and support for changes in the hierarchical structure.
50   * @see <a href="http://docs.yworks.com/yfiles/doc/api/index.html#/dguide/hier_mvc_view" target="_blank">Section View Implementations</a> in the yFiles for Java Developer's Guide
51   */
52  public class HierarchyJTreeDemo extends GroupingDemo {
53  
54    /**
55     * Instantiates this demo. Builds the GUI.
56     */
57    public HierarchyJTreeDemo() {
58      JTree tree = configureHierarchyJTree();
59  
60      //plug the gui elements together and add them to the pane
61      JScrollPane scrollPane = new JScrollPane(tree);
62      scrollPane.setPreferredSize(new Dimension(150, 0));
63      scrollPane.setMinimumSize(new Dimension(150, 0));
64      JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, scrollPane, view);
65      view.fitContent();
66      contentPane.add(splitPane, BorderLayout.CENTER);
67    }
68  
69    protected JTree configureHierarchyJTree() {
70      Graph2D rootGraph = view.getGraph2D();
71  
72      //propagates text label changes on nodes as change events
73      //on the hierarchy.
74      rootGraph.addGraph2DListener(new DefaultNodeChangePropagator());
75  
76      //create a TreeModel, that represents the hierarchy of the nodes.
77      HierarchyManager hierarchy = getHierarchyManager();
78      HierarchyTreeModel htm = new HierarchyTreeModel(hierarchy);
79  
80      //use a convenience comparator that sorts the elements in the tree model
81      //folder/group nodes will come before normal nodes
82      htm.setChildComparator(HierarchyTreeModel.createNodeStateComparator(hierarchy));
83  
84      //display the graph hierarchy in a special JTree using the given TreeModel
85      JTree tree = new HierarchyJTree(hierarchy, htm);
86  
87      //add a navigational action to the tree - when double clicking a node in the tree,
88      //it will be centered in the view (if necessary navigating into an inner graph of a folder node)
89      tree.addMouseListener(new HierarchyJTreeDoubleClickListener(view));
90  
91      //add drag and drop functionality to HierarchyJTree. The drag and drop gesture
92      //will allow to reorganize the group structure using HierarchyJTree.
93      tree.setDragEnabled(true);
94      tree.setTransferHandler(new HierarchyTreeTransferHandler(hierarchy));
95      return tree;
96    }
97  
98    /**
99     * Launches this demo.
100    */
101   public static void main(String[] args) {
102     EventQueue.invokeLater(new Runnable() {
103       public void run() {
104         Locale.setDefault(Locale.ENGLISH);
105         initLnF();
106         (new HierarchyJTreeDemo()).start();
107       }
108     });
109   }
110 }
111