Example usage for javax.swing.event TreeModelEvent getChildren

Introduction

In this page you can find the example usage for javax.swing.event TreeModelEvent getChildren.

Prototype

public Object[] getChildren() 

Source Link

Document

Returns the objects that are children of the node identified by getPath at the locations specified by getChildIndices.

Usage

From source file:Main.java

public static void main(String args[]) {
    JFrame f = new JFrame("JTree Demo");
    f.setSize(260, 240);/*w  ww . ja va2  s .co  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);
}

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From source file:hr.fer.zemris.vhdllab.view.explorer.ProjectExplorerView.java

@Override
protected JComponent createControl() {
    CommandManager commandManager = getActiveWindow().getCommandManager();
    commandManager.createCommandGroup("hierarchyMenu", new String[] { hierarchyXUsesYCommand.getId(),
            hierarchyXUsedByYCommand.getId(), hierarchyFlatCommand.getId() });
    CommandGroup commandGroup = commandManager.createCommandGroup("treePopupMenu",
            new String[] { "newMenu", "separator", openCommand.getId(), "separator", compileCommand.getId(),
                    simulateCommand.getId(), viewVhdlCommand.getId(), "separator", deleteCommand.getId(),
                    "separator", "hierarchyMenu" });
    popupMenu = commandGroup.createPopupMenu();

    root = new DefaultMutableTreeNode("vhdllab-root");
    model = new DefaultTreeModel(root);
    model.addTreeModelListener(new TreeModelAdapter() {
        @Override/*from w w w  . j a  va  2 s  .co  m*/
        public void treeNodesInserted(TreeModelEvent e) {
            Object[] children = e.getChildren();
            if (children.length > 0) {
                Object child = children[children.length - 1];
                TreePath path = e.getTreePath().pathByAddingChild(child);
                tree.setSelectionPath(path);
            }
        }
    });
    tree = new JTree(model);
    tree.setRootVisible(false);
    tree.setShowsRootHandles(true);
    // tree is expanded manually in OpenFileOrShowPopupMenuListener
    tree.setToggleClickCount(0);
    tree.setCellRenderer(new WorkspaceCellRenderer());
    tree.addMouseListener(new OpenFileOrShowPopupMenuListener());
    tree.addTreeSelectionListener(new CommandGuard());
    tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);

    JPanel hierarchyPanel = new JPanel();
    hierarchyPanel.add(createHierarchyButton(hierarchyXUsesYCommand));
    hierarchyPanel.add(createHierarchyButton(hierarchyXUsedByYCommand));
    hierarchyPanel.add(createHierarchyButton(hierarchyFlatCommand));
    JPanel borderHierarchyPanel = new JPanel(new BorderLayout());
    borderHierarchyPanel.add(hierarchyPanel, BorderLayout.WEST);

    JPanel control = new JPanel(new BorderLayout());
    control.add(borderHierarchyPanel, BorderLayout.NORTH);
    control.add(new JScrollPane(tree), BorderLayout.CENTER);

    return control;
}

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