JTree trouble

[Alantie Vala]

Hello! i have following TreeModel (with some modifications):

Code:

public class FileSystemModelFull implements FileSystemModel {
 
    private File root;
 
    private List<TreeModelListener> listeners = new ArrayList<TreeModelListener>();
 
    public FileSystemModelFull(File f) {
        root = f;
    }
 
    public File getRoot() {
        return root;
    }
 
    public File getChild(Object parent, int index) {
        File directory = (File) parent;
        String[] children = directory.list();
        return new File(directory, children[index]);
    }
 
    public int getChildCount(Object parent) {
        File file = (File) parent;
        if (file.isDirectory()) {
            String[] fileList = file.list();
            if (fileList != null)
                return file.list().length;
 
        }
        return 0;
    }
 
    public boolean isLeaf (Object node) {
        File file = (File) node;
        return file.isFile();
    }
 
    public int getIndexOfChild (Object parent, Object child) {
        File directory = (File) parent;
        File file = (File) child;
        String[] children = directory.list();
        for (int i = 0; i < children.length; i++) {
            if (file.getName().equals(children[i]))
                return i;
        }
        return 0;
    }
 
    public void valueForPathChanged (TreePath path, Object value) {
        File oldFile = (File) path.getLastPathComponent();
        String fileParentPath = oldFile.getParent();
        String newFileName = (String) value;
        File targetFile = new File(fileParentPath, newFileName);
        oldFile.renameTo(targetFile);
        File parent = new File(fileParentPath);
        int[] changedChildrenIndices = {getIndexOfChild(parent, targetFile)};
        Object[] changedChildren = {targetFile};
        fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
    }
 
    private void fireTreeNodesChanged (TreePath parentPath, int[] indices, Object[] children) {
        TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
        for (TreeModelListener listener : listeners) {
            listener.treeNodesChanged(event);
        }
    }
 
    public void addTreeModelListener (TreeModelListener listener) {
        listeners.add(listener);
    }
 
    public void removeTreeModelListener (TreeModelListener listener) {
        listeners.remove(listener);
    }
}

public class Main extends JFrame {
localTreeModel = new FileSystemModel(new File("c:\\")); // for win
localFileTree = new JTree(localTreeModel);
 
localFileTree.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
   TreePath tp = localFileTree.getPathForLocation(e.getX(), e.getY());
   if (e.getClickCount() == 2 && tp != null) {
      File f = new File(tTreePath.getLastPathComponent().toString());
      f.delete();
      }
   }
});

thus i create JTree to browse it and make some actions to expanded tree nodes (i.e. copy/paste/delete).

This concret example must delete single file (not directory) on double click.

After u do so u ll see that leaf identifying that file is still on place in JTree and not deleted

After this i must refresh tree - but unfortunally theres no way i can see to do so=(

Can anyone help with this situation - cause i m stucked with it for a long time already.

[hardwired]

Tell the TreeModel about the change. The tree listens to the model for changes.
You might try something like

Code:

((DefaultTreeModel)tree.getModel()).nodesWereRemoved(...args...);

[Alantie Vala]

Unfortunally this line made error for me.

Looks like i cannot cast tree.getModel() to DefaultTreeModel.

or this might be some bug for me? cause i seen this way in some other applications - anyway pls try this code and tell me if it works for u/

[hardwired]

It looks like FileSystemModel implements TreeModel which is not mutable, ie, you cannot add and delete nodes in this model. You can add and delete nodes in a DefaultTreeModel.
You have to explicitly use/set a DefaultTreeModel to get this kind of behavior.