Examples of javax.swing.tree.DefaultMutableTreeNode$PreorderEnumeration

javax.swing.tree.DefaultMutableTreeNode
oracle.com/javase/tutorial/uiswing/components/tree.html">How to Use Trees in The Java Tutorial.
A tree node may have at most one parent and 0 or more children. DefaultMutableTreeNode provides operations for examining and modifying a node's parent and children and also operations for examining the tree that the node is a part of. A node's tree is the set of all nodes that can be reached by starting at the node and following all the possible links to parents and children. A node with no parent is the root of its tree; a node with no children is a leaf. A tree may consist of many subtrees, each node acting as the root for its own subtree.
This class provides enumerations for efficiently traversing a tree or subtree in various orders or for following the path between two nodes. A DefaultMutableTreeNode may also hold a reference to a user object, the use of which is left to the user. Asking a DefaultMutableTreeNode for its string representation with toString() returns the string representation of its user object.
This is not a thread safe class.If you intend to use a DefaultMutableTreeNode (or a tree of TreeNodes) in more than one thread, you need to do your own synchronizing. A good convention to adopt is synchronizing on the root node of a tree.
While DefaultMutableTreeNode implements the MutableTreeNode interface and will allow you to add in any implementation of MutableTreeNode not all of the methods in DefaultMutableTreeNode will be applicable to all MutableTreeNodes implementations. Especially with some of the enumerations that are provided, using some of these methods assumes the DefaultMutableTreeNode contains only DefaultMutableNode instances. All of the TreeNode/MutableTreeNode methods will behave as defined no matter what implementations are added.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see {@link java.beans.XMLEncoder}. @see MutableTreeNode @author Rob Davis

        if (debug)
            System.out.println("searchUserColor begin");
        loc.clear(); // clear the list


        for (Iterator it = lot.iterator(); it.hasNext();) {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) it.next();
            if (!node.isRoot()) {
                GanttTask task = (GanttTask) (node.getUserObject());
                Color color = task.getColor();
                String hexaColor = getHexaColor(color);
            }
        }
        if (debug)

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        int index = 0;


        // now add text and box objects to the tasks
        for (Iterator it = lot.iterator(); it.hasNext();) {
            DefaultMutableTreeNode node = ((DefaultMutableTreeNode) it.next());
            if (!node.isRoot()) {
                // get the task
                GanttTask task = (GanttTask) node.getUserObject();


                // get the text infos of the task
                TextObject textLabel = task2text(task, index, node.getLevel(),
                        (int) depthval);
                if (debug)
                    System.out.println("    add TEXT");
                atl.add(textLabel);


                // get the box object of the task
                BoxObject boxObject = task2box(task, (int) depthval, index,
                        node.isLeaf());
                if (debug)
                    System.out.println("    add BOX");
                abl.add(boxObject);


                index++;

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                System.out.println("drawTasks begin");


            // loop on tasks
            int i = 0;
            for (Iterator it = lot.iterator(); it.hasNext();) {
                DefaultMutableTreeNode node = ((DefaultMutableTreeNode) it
                        .next());
                // get the task
                if (!node.isRoot()) {
                    GanttTask task = (GanttTask) (node.getUserObject());


                    TextObject txtObj = (TextObject) (atl.get(i));
                    BoxObject boxObject = (BoxObject) (abl.get(i));


                    // print the text of the task

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    }
    /** add an object with the expand information */
    public DefaultMutableTreeNode addObjectWithExpand(Object child,
            DefaultMutableTreeNode parent) {


        DefaultMutableTreeNode childNode = new TaskNode((Task) child);


        if (parent == null)
            parent = rootNode;


        treeModel.insertNodeInto(childNode, parent, parent.getChildCount());
        //forwardScheduling();


        Task task = (Task) (childNode.getUserObject());


        boolean res = true;


        if (parent == null)
            res = false;


        // test for expantion
        while (parent != null) {
            Task taskFather = (Task) (parent.getUserObject());
            if (!taskFather.getExpand()) {
                res = false;
                break;
            }
            parent = (DefaultMutableTreeNode) (parent.getParent());
        }


        treetable.getTree().scrollPathToVisible(
                new TreePath(childNode.getPath()));
        if (!res && parent!=null) {
            treetable.getTree().collapsePath(new TreePath(parent.getPath()));
        }
//        else
//            task.setExpand(false);

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        return childNode;
    }


    /** Return the selected task */
    private GanttTask getSelectedTask() {
        DefaultMutableTreeNode node = getSelectedTaskNode();
        if (node == null)
            return null;
        return (GanttTask) (node.getUserObject());
    }

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    public DefaultMutableTreeNode getSelectedNode() {
        TreePath currentSelection = treetable.getTree().getSelectionPath();
        if (currentSelection == null) {
            return null;
        }
        DefaultMutableTreeNode dmtnselected = (DefaultMutableTreeNode) currentSelection
                .getLastPathComponent();
        return dmtnselected;
    }

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        TreePath currentSelection = treetable.getTree().getSelectionPath();
        if (currentSelection == null
                || !(currentSelection.getLastPathComponent() instanceof TaskNode)) {
            return null;
        }
        DefaultMutableTreeNode dmtnselected = (DefaultMutableTreeNode) currentSelection
                .getLastPathComponent();
        return dmtnselected;
    }

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    }


    private TaskNode[] getOnlyTaskNodes(DefaultMutableTreeNode[] array) {
        List resAsList = new ArrayList();
        for (int i = 0; i < array.length; i++) {
            DefaultMutableTreeNode next = array[i];
            if (next instanceof TaskNode)
                resAsList.add(next);
        }
        return (TaskNode[]) resAsList.toArray(new TaskNode[0]);
    }

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        return (TaskNode[]) resAsList.toArray(new TaskNode[0]);
    }


    /** Return the DefaultMutableTreeNode with the name name. */
    public DefaultMutableTreeNode getNode(int id /* String name */) {
        DefaultMutableTreeNode res, base;
        base = (DefaultMutableTreeNode) treetable.getTreeTableModel().getRoot();
        Enumeration e = base.preorderEnumeration();
        while (e.hasMoreElements()) {
            res = ((DefaultMutableTreeNode) e.nextElement());
            if (res instanceof TaskNode)
                if (((Task) (res.getUserObject())).getTaskID() == id) {
                    return res;
                }
        }
        return null;
    }

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    public List getAllVisibleNodes() {
        List res = new ArrayList();
        Enumeration enumeration = rootNode.preorderEnumeration();
        while (enumeration.hasMoreElements()) {
            DefaultMutableTreeNode o = (DefaultMutableTreeNode) enumeration
                    .nextElement();
            if (getTreeTable().getTree().isVisible(new TreePath(o.getPath())))
                res.add(o);
        }
        return res;
    }

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