asked on

Dynamically Update Elements in JTree

I have a tree let say
A
B
C
D
E
F

When I click on f.e B in another Panel I see the value of B in a text field, what I need to know
if there is a way that once I change the value in text field for B, it will automatically change the value for B in the tree.
Im not sure that there is any update function for Jtrees
thanks

mccarl

How are you setting up the JTree at the moment? Can you post the code that you have?

damixa

ASKER

Part of the code as this is a big app.
but i extracted the code that is related to the tree.
DefaultMutableTreeNode robotsNode = getRobotTree();
            //model = new XMLTreeModel();
            tree = new JTree(model);
            model = new DefaultTreeModel(robotsNode);
******************
            tree.setModel(model);
            tree.setShowsRootHandles(true);
            tree.setEditable(false);
*************************************

            tree.addTreeSelectionListener(new TreeSelectionListener() {
                  public void valueChanged(TreeSelectionEvent e) {

                  DefaultMutableTreeNode selectedNode = getSelectedNode();
                  if (selectedNode!=null) {
                  if (getNodeType(selectedNode)=="Root" ) {
                        addShapeButton.setEnabled(false);
                        addComponentButton.setEnabled(true);
                  }
                  else {
                        addComponentButton.setEnabled(false);
                        addShapeButton.setEnabled(true);}
                  String View;
                  System.out.println("Clicked;" + getNodeName(selectedNode));
                  if (getNodeType(selectedNode)=="Root")
                        View=" Root ";
                  else
                        View= getNodeName(selectedNode);
                  tFields.setText(View);

              }}
            });

       private static String getNodeName(DefaultMutableTreeNode TNode) {
             String nodeString=" ";
             String[] tmp= TNode.getUserObject().toString().split(" ");
             if (tmp.length>1)
             nodeString=tmp[1];
             return nodeString;
       }
       private static DefaultMutableTreeNode getSelectedNode() {
              return (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
              }

              private static DefaultMutableTreeNode getRobotTree() {
                   DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Root");
              return rootNode;
              }

damixa

ASKER

Now what I want to do that when i change the value in the text field tField the value is directly changed in the tree.

ASKER CERTIFIED SOLUTION

mccarl

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SOLUTION

Mick Barry

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mccarl

Also, you will have to call repaint() on the tree after you update the node's userObject

damixa

ASKER

Thanks, I used just an actionperformed and worked fine, as I have no experience with document listeners. Well If you objects If you have a simple document listener example I can open another question so you can get other points. for this one I will give most of the points to Mccarl. hope it is ok for you.