Example usage for javax.swing.tree DefaultMutableTreeNode getUserObject

Introduction

In this page you can find the example usage for javax.swing.tree DefaultMutableTreeNode getUserObject.

Prototype

public Object getUserObject()

Source Link

Document

Returns this node's user object.

Usage

From source file:Main.java

public static void main(String[] args) {
    JFrame frame = new JFrame(Main.class.getSimpleName());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    final JTree tree = new JTree(createTreeModel(new File(System.getProperty("user.dir")), true));
    tree.setCellRenderer(new DefaultTreeCellRenderer() {
        @Override/*from www .  ja  v  a2s  .  com*/
        public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded,
                boolean leaf, int row, boolean hasFocus) {
            super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
            if (value instanceof DefaultMutableTreeNode) {
                DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
                if (node.getUserObject() instanceof File) {
                    setText(((File) node.getUserObject()).getName());
                }
            }
            return this;
        }
    });
    tree.getSelectionModel().addTreeSelectionListener(e -> {
        Object object = tree.getLastSelectedPathComponent();
        if (object instanceof DefaultMutableTreeNode) {
            Object userObject = ((DefaultMutableTreeNode) object).getUserObject();
            if (userObject instanceof File) {
                File file = (File) userObject;
                System.out.println(
                        "Selected file" + file.getAbsolutePath() + " Is directory? " + file.isDirectory());
            }
        }
    });
    JScrollPane pane = new JScrollPane(tree);
    frame.add(pane);
    frame.setSize(400, 600);
    frame.setVisible(true);
}

From source file:TreeExpandSample.java

public static void main(String args[]) {
    String title = ("JTree Expand Sample");
    JFrame frame = new JFrame(title);
    JTree tree = new JTree();
    TreeWillExpandListener treeWillExpandListener = new TreeWillExpandListener() {
        public void treeWillCollapse(TreeExpansionEvent treeExpansionEvent) throws ExpandVetoException {
            TreePath path = treeExpansionEvent.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            if (data.equals("colors")) {
                throw new ExpandVetoException(treeExpansionEvent);
            }/*from  ww  w. ja  v  a  2 s.c o  m*/
        }

        public void treeWillExpand(TreeExpansionEvent treeExpansionEvent) throws ExpandVetoException {
            TreePath path = treeExpansionEvent.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            if (data.equals("sports")) {
                throw new ExpandVetoException(treeExpansionEvent);
            }
        }
    };
    tree.addTreeWillExpandListener(treeWillExpandListener);
    JScrollPane scrollPane = new JScrollPane(tree);
    frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
}

From source file:TreeExpansionListenerDemo.java

public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
    root.add(new DefaultMutableTreeNode("A"));
    root.add(new DefaultMutableTreeNode("B"));
    root.add(new DefaultMutableTreeNode("C"));
    JTree tree = new JTree(root);

    TreeExpansionListener treeExpandListener = new TreeExpansionListener() {

        public void treeExpanded(TreeExpansionEvent event) {
            TreePath path = event.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            System.out.println("Expanded: " + data);
        }//from  www . j  a va  2  s. c  om

        public void treeCollapsed(TreeExpansionEvent event) {
            TreePath path = event.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            System.out.println("Collapsed: " + data);
        }
    };

    tree.addTreeExpansionListener(treeExpandListener);

    JScrollPane scrollPane = new JScrollPane(tree);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);

}

From source file:Main.java

public static void main(String args[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
    root.add(new DefaultMutableTreeNode("A"));
    root.add(new DefaultMutableTreeNode("B"));
    root.add(new DefaultMutableTreeNode("C"));
    JTree tree = new JTree(root);

    TreeWillExpandListener treeWillExpandListener = new TreeWillExpandListener() {
        public void treeWillCollapse(TreeExpansionEvent treeExpansionEvent) throws ExpandVetoException {
            TreePath path = treeExpansionEvent.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            System.out.println("WillCollapse: " + data);

        }/*from   w  w  w  . ja  va  2  s.c  o m*/

        public void treeWillExpand(TreeExpansionEvent treeExpansionEvent) throws ExpandVetoException {
            TreePath path = treeExpansionEvent.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            System.out.println("WillExpand: " + data);

        }
    };

    tree.addTreeWillExpandListener(treeWillExpandListener);

    JScrollPane scrollPane = new JScrollPane(tree);
    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);

}

From source file:Main.java

public static void main(String args[]) {
    JFrame f = new JFrame("JTree Demo");
    f.setSize(260, 240);/*from w ww  .j av  a 2s .  c o m*/
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
    DefaultMutableTreeNode aNode = new DefaultMutableTreeNode("A");
    root.add(aNode);

    DefaultMutableTreeNode bNode = new DefaultMutableTreeNode("B");
    aNode.add(bNode);

    DefaultMutableTreeNode cNode = new DefaultMutableTreeNode("C");
    aNode.add(cNode);

    cNode.add(new DefaultMutableTreeNode("D"));
    cNode.add(new DefaultMutableTreeNode("E"));

    DefaultMutableTreeNode fNode = new DefaultMutableTreeNode("F");
    root.add(fNode);

    DefaultMutableTreeNode gNode = new DefaultMutableTreeNode("G");
    fNode.add(gNode);
    fNode.add(new DefaultMutableTreeNode("H"));
    gNode.add(new DefaultMutableTreeNode("I"));

    JTree jtree = new JTree(root);
    jtree.setEditable(true);

    TreeSelectionModel tsm = jtree.getSelectionModel();
    tsm.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);

    jtree.addTreeExpansionListener(new TreeExpansionListener() {
        public void treeExpanded(TreeExpansionEvent tee) {
            TreePath tp = tee.getPath();
            System.out.println("Expansion: " + tp.getLastPathComponent());
        }

        public void treeCollapsed(TreeExpansionEvent tee) {
            TreePath tp = tee.getPath();
            System.out.println("Collapse: " + tp.getLastPathComponent());
        }
    });

    jtree.addTreeSelectionListener(new TreeSelectionListener() {
        public void valueChanged(TreeSelectionEvent tse) {
            TreePath tp = tse.getPath();
            System.out.println("Selection event: " + tp.getLastPathComponent());
        }
    });

    jtree.getModel().addTreeModelListener(new TreeModelListener() {
        public void treeNodesChanged(TreeModelEvent tme) {
            TreePath tp = tme.getTreePath();
            Object[] children = tme.getChildren();
            DefaultMutableTreeNode changedNode;
            if (children != null)
                changedNode = (DefaultMutableTreeNode) children[0];
            else
                changedNode = (DefaultMutableTreeNode) tp.getLastPathComponent();

            System.out.println("Model change path: " + tp + "New data: " + changedNode.getUserObject());

        }

        public void treeNodesInserted(TreeModelEvent tme) {
        }

        public void treeNodesRemoved(TreeModelEvent tme) {
        }

        public void treeStructureChanged(TreeModelEvent tme) {
        }
    });

    f.add(new JScrollPane(jtree));
    f.setVisible(true);
}

From source file:Main.java

public static boolean isChildNode(DefaultMutableTreeNode parent, DefaultMutableTreeNode child) {
    if (parent == child)
        return false;
    DefaultMutableTreeNode node = child;
    while ((node = (DefaultMutableTreeNode) node.getParent()) != null) {
        if (node.getUserObject() == parent.getUserObject())
            return true;
    }/*from w  w w  .ja v  a  2s  .  c o  m*/
    return false;
}

From source file:Main.java

public static DefaultMutableTreeNode sortTreeNode(DefaultMutableTreeNode root) {
    if (root == null)
        return root;
    int count = root.getChildCount();
    if (count <= 0)
        return root;
    for (int i = 0; i < count; i++) {
        for (int j = count - 1; j > i; j--) {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) root.getChildAt(j);
            String nt = node.getUserObject().toString();
            DefaultMutableTreeNode prevNode = (DefaultMutableTreeNode) root.getChildAt(j - 1);
            String np = prevNode.getUserObject().toString();
            if (nt.compareToIgnoreCase(np) < 0) {
                root.insert(node, j - 1);
                root.insert(prevNode, j);
            }//from www  . j a v  a2s. c om
        }
        sortTreeNode((DefaultMutableTreeNode) root.getChildAt(i));
    }

    for (int i = 0; i < count; i++) {
        for (int j = count - 1; j > i; j--) {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) root.getChildAt(j);
            DefaultMutableTreeNode prevNode = (DefaultMutableTreeNode) root.getChildAt(j - 1);
            if (prevNode.isLeaf() && !node.isLeaf()) {
                root.insert(node, j - 1);
                root.insert(prevNode, j);
            }
        }
    }

    return root;
}

From source file:Main.java

private static DefaultMutableTreeNode addCloneNode(DefaultMutableTreeNode srcNode,
        DefaultMutableTreeNode root) {
    DefaultMutableTreeNode clone = new DefaultMutableTreeNode(srcNode.getUserObject());
    root.add(clone);//from  w w  w .j av a  2 s . c  o m
    for (int i = 0; i < srcNode.getChildCount(); i++) {
        DefaultMutableTreeNode child = (DefaultMutableTreeNode) srcNode.getChildAt(i);
        addCloneNode(child, clone);
    }
    return clone;
}

From source file:Main.java

public static DefaultMutableTreeNode cloneTreeNode(DefaultMutableTreeNode srcNode) {
    if (srcNode == null)
        return null;
    DefaultMutableTreeNode node = new DefaultMutableTreeNode(srcNode.getUserObject());
    for (int i = 0; i < srcNode.getChildCount(); i++) {
        DefaultMutableTreeNode child = (DefaultMutableTreeNode) srcNode.getChildAt(i);
        addCloneNode(child, node);/*ww  w  . ja va 2  s  .  c  o m*/
    }
    return node;
}

From source file:MyData.java

public static MyData getQuestionFromValue(Object value) {
    if (value instanceof DefaultMutableTreeNode) {
        DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
        Object userObject = node.getUserObject();
        if (userObject instanceof Main) {
            return (MyData) userObject;
        }/*  w  w  w .  j  a  v a  2  s. c  om*/
    }
    return null;
}