I need a TreeView

Question

Hi all,
I need a TreeView component for an upcoming project, but unfortunately it seems like JavaFX has not yet provided one. Any tips on how I should go about it? Should I use a ListView, and create my own cutomized Nodes that has the functionality of collapsing/expanding the list of children nodes?

Answer 1

Hi Carl,
you could use a JTree wraped in Javafx.
Code:
package controlcenter_v4;
import javafx.ext.swing.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.lang.Object;
class MyTreeCell {
    public var text: String;
    public var cells: MyTreeCell[];
    public var value: Object;
    override function toString ():String {
        return text;
class MyTree extends SwingComponent{
    var tree: JTree;
    var model: DefaultTreeModel;
    public var selectedValue: java.lang.Object;
    public var action: function(obj:Object);
    public var root: MyTreeCell on replace{
        if (root != null){
            model.setRoot(getCell(root));
            var obj = model.getRoot();
            var tp = new TreePath(obj);
    override function createJComponent(): JComponent {
        tree = new JTree();
        model = tree.getModel() as DefaultTreeModel;
        var  mouseListener = java.awt.event.MouseAdapter {
            override function mousePressed(e: java.awt.event.MouseEvent) {
                var selRow = tree.getRowForLocation(e.getX(), e.getY());
                var selPath = tree.getPathForLocation(e.getX(), e.getY());
                var lastPath = selPath.getPathComponent(selPath.getPathCount() - 1);
                var obj = (lastPath as DefaultMutableTreeNode).getUserObject();
                if(action != null ){
                   action(obj);
                if(selRow != - 1) {
                    if(e.getClickCount() == 1) {
                        selectedValue = obj;
                    else if(e.getClickCount() == 2) {
                getJComponent().repaint();
        tree.addMouseListener(mouseListener);
        tree.setRootVisible(false);
        var scrollPane = new JScrollPane(tree);
        return scrollPane;
    function getCell(cell: MyTreeCell): MutableTreeNode {
        var node = new DefaultMutableTreeNode(cell);
        for (c  in  cell.cells ){
            node.<<insert>>(getCell(c),node.getChildCount());
        return node;
}Here is some example code how to use it:
Example:
Scene {
    content: [
        MyTree{
            root: MyTreeCell{
                text: "Root"
                cells: [
                    MyTreeCell{
                        text: "Letters"
                        cells:[
                            MyTreeCell{
                                text: "a"
                            MyTreeCell{
                                text: "b"
                    MyTreeCell{
                        text: "Digits"
                        cells: for( i in [0..9]) MyTreeCell{ text: "{i}"}
            action: function(obj:Object){
                println("Selected object: {obj}");
}source: [http://jfx.wikia.com/wiki/SwingComponents|http://jfx.wikia.com/wiki/SwingComponents]
Edited by: Jazzor on Jun 24, 2009 12:16 AM