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JTextField in JTree - make it editable

does anybody have a sample code for a tree with check boxes and text fields?
Because now I have a code for check box (only) based tree. I tried to implement also text fields in the tree (with Jlabels). But I get stucked and I am really confused. I can't get any further and I hoped that you can help me.
The issue is. I cant modify the text of JTextFields. The modification doesnt get saved. And I do not know how to add a JLabel in the same line of the JTextField
Root
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|- Node 1
| - [-] Activate simulation
| - [100] Iterations
|- Node 2
| - [x] Activate simulation
| - [2000] Iterations
package view;
import javax.swing.BoxLayout;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JInternalFrame;
import javax.swing.JTextField;
import org.jdesktop.swingx.JXTreeTable;
import org.jdesktop.swingx.treetable.AbstractTreeTableModel;
import org.jdesktop.swingx.treetable.DefaultMutableTreeTableNode;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.event.DocumentListener;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.AbstractCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.DocumentEvent;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
public class test {
private Document dom;
private void parseXmlFile(String xmlpath){
//get the factory
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
//Using factory get an instance of document builder
DocumentBuilder db = dbf.newDocumentBuilder();
//parse using builder to get DOM representation of the XML file
dom = db.parse(xmlpath);
}catch(ParserConfigurationException pce) {
pce.printStackTrace();
}catch(SAXException se) {
se.printStackTrace();
}catch(IOException ioe) {
ioe.printStackTrace();
}
}
public static void main(String args[]) {
JFrame frame = new JFrame("CheckBox Tree");
CheckBoxNode accessibilityOptions[] = {
new CheckBoxNode(
"Move system caret with focus/selection changes", false),
new CheckBoxNode("Always expand alt text for images", true) };
CheckBoxNode browsingOptions[] = {
new CheckBoxNode("Notify when downloads complete", true),
new CheckBoxNode("Disable script debugging", true),
new CheckBoxNode("Use AutoComplete", true),
new CheckBoxNode("Browse in a new process", false)
};
TextBoxNode loloptions[] =
{
new TextBoxNode("oha", "lol"),
new TextBoxNode("oha1", "lol"),
new TextBoxNode("oha2", "lol")
};
Vector accessVector = new NamedVector("Accessibility",
accessibilityOptions);
Vector browseVector = new NamedVector("Browsing", browsingOptions);
Vector browse1Vector = new NamedVector("Browsing", browsingOptions);
Vector browse2Vector = new NamedVector("textboxnodes", loloptions);
Object lolNodes[] = {browse1Vector, browseVector, browse2Vector};
Vector lolvec = new NamedVector("Overking", lolNodes);
Object rootNodes[] = { accessVector, lolvec};
lolvec.add(new CheckBoxNode("oh",false));
Vector rootVector = new NamedVector("Root", rootNodes);
JTree tree = new JTree(rootVector);
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
tree.setCellRenderer(renderer);
tree.setCellEditor(new CheckBoxNodeEditor(tree));
tree.setEditable(true);
for (int i = 0; i < tree.getRowCount(); i++) {
tree.expandRow(i);
}
JScrollPane scrollPane = new JScrollPane(tree);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class CheckBoxNodeRenderer implements TreeCellRenderer {
private JCheckBox leafRenderer = new JCheckBox();
private JTextField leafRendererAlt = new JTextField();
private DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();
Color selectionBorderColor, selectionForeground, selectionBackground,
textForeground, textBackground;
protected Object getLeafRenderer() {
if(leafRenderer.getText().length() > 0)
return leafRenderer;
else
return leafRendererAlt;
}
public CheckBoxNodeRenderer() {
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
leafRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager
.get("Tree.drawsFocusBorderAroundIcon");
leafRenderer.setFocusPainted((booleanValue != null)
&& (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForeground = UIManager.getColor("Tree.selectionForeground");
selectionBackground = UIManager.getColor("Tree.selectionBackground");
textForeground = UIManager.getColor("Tree.textForeground");
textBackground = UIManager.getColor("Tree.textBackground");
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
Component returnValue;
if (leaf) {
String stringValue = tree.convertValueToText(value, selected,
expanded, leaf, row, false);
if(stringValue.contains("TextBoxNode"))
{
leafRenderer = new JCheckBox();
leafRendererAlt.setText(stringValue);
//leafRendererAlt.setValue(value);
leafRendererAlt.setEnabled(tree.isEnabled());
if (selected) {
leafRendererAlt.setForeground(selectionForeground);
leafRendererAlt.setBackground(selectionBackground);
} else {
leafRendererAlt.setForeground(textForeground);
leafRendererAlt.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value)
.getUserObject();
if (userObject instanceof TextBoxNode) {
TextBoxNode node = (TextBoxNode) userObject;
leafRendererAlt.setText(node.getText());
}
}
returnValue = leafRendererAlt;
}
else
{
leafRendererAlt = new JTextField();
leafRenderer.setText(stringValue);
leafRenderer.setSelected(false);
leafRenderer.setEnabled(tree.isEnabled());
if (selected) {
leafRenderer.setForeground(selectionForeground);
leafRenderer.setBackground(selectionBackground);
} else {
leafRenderer.setForeground(textForeground);
leafRenderer.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value)
.getUserObject();
if (userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode) userObject;
leafRenderer.setText(node.getText());
leafRenderer.setSelected(node.isSelected());
}
}
returnValue = leafRenderer;
}
} else {
returnValue = nonLeafRenderer.getTreeCellRendererComponent(tree,
value, selected, expanded, leaf, row, hasFocus);
}
return returnValue;
}
}
class CheckBoxNodeEditor extends AbstractCellEditor implements TreeCellEditor {
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
ChangeEvent changeEvent = null;
JTree tree;
public CheckBoxNodeEditor(JTree tree) {
this.tree = tree;
}
public Object getCellEditorValue() {
JCheckBox checkbox;
JTextField textfield;
CheckBoxNode checkBoxNode;
TextBoxNode txtBoxNode;
if(renderer.getLeafRenderer() instanceof JCheckBox)
{
checkbox = (JCheckBox) renderer.getLeafRenderer();
checkBoxNode = new CheckBoxNode(checkbox.getText(),
checkbox.isSelected());
return checkBoxNode;
}
else
{
textfield = (JTextField) renderer.getLeafRenderer();
String txt = textfield.getText();
txtBoxNode = new TextBoxNode(txt, txt);
return txtBoxNode;
}
}
public boolean isCellEditable(EventObject event) {
boolean returnValue = false;
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
TreePath path = tree.getPathForLocation(mouseEvent.getX(),
mouseEvent.getY());
if (path != null) {
Object node = path.getLastPathComponent();
if ((node != null) && (node instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
Object userObject = treeNode.getUserObject();
if((userObject instanceof TextBoxNode) || (userObject instanceof CheckBoxNode))
returnValue = treeNode.isLeaf();
}
}
}
return returnValue;
}
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row) {
Component editor = renderer.getTreeCellRendererComponent(tree, value,
true, expanded, leaf, row, true);
// editor always selected / focused
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
if (stopCellEditing()) {
fireEditingStopped();
}
}
};
DocumentListener doclistener = new DocumentListener(){
public void changedUpdate(DocumentEvent e) {
System.out.print(e);
}
#Override
public void insertUpdate(DocumentEvent arg0) {
// TODO Auto-generated method stub
javax.swing.text.Document test = arg0.getDocument();
System.out.print(arg0);
fireEditingStopped();
}
#Override
public void removeUpdate(DocumentEvent arg0) {
// TODO Auto-generated method stub
System.out.print(arg0);
}
};
if (editor instanceof JCheckBox) {
((JCheckBox) editor).addItemListener(itemListener);
}
else if (editor instanceof JTextField)
{
((JTextField) editor).getDocument().addDocumentListener(doclistener);
}
return editor;
}
}
class CheckBoxNode {
String text;
boolean selected;
public CheckBoxNode(String text, boolean selected) {
this.text = text;
this.selected = selected;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean newValue) {
selected = newValue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
public String toString() {
return getClass().getName() + "[" + text + "/" + selected + "]";
}
}
class TextBoxNode{
String text;
String value;
public TextBoxNode(String text, String value) {
this.text = text;
this.value = value;
}
public String getValue() {
return value;
}
public void setValue(String newvalue) {
value = newvalue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
public String toString() {
return getClass().getName() + "[" + text + "/" + value + "]";
}
}
class NamedVector extends Vector {
String name;
public NamedVector(String name) {
this.name = name;
}
public NamedVector(String name, Object elements[]) {
this.name = name;
for (int i = 0, n = elements.length; i < n; i++) {
add(elements[i]);
}
}
public String toString() {
return "[" + name + "]";
}
}
The issue is. I cant modify the text of JTextFields. And I do not know how to add a JLabel in the same line of the JTextField
I hope you can help me.

In principle you should cleanly separate the renderer and the editor. In your case, they are closely tied together (in fact, the editor returns the JTextField instance of the renderer)... A renderer is not supposed to be editable. I doubt in your case that the editor is ever called.
I see two possible solutions:
Heavily refactor your code, to separate rendering and editing (e.g. rendering with JLabel and editing with JTextField -- or simply using a DefaultTreeCellEditor -- example here). Let the tree determine when the edit starts, when to call the editor, when to cancel an edit, etc...
Or you can by-pass the standard editing mechanism (as you are already doing more or less): Completely remove the TreeCellEditor from your code and let the renderer do all the work. Add appropriate listeners to your JTextField and JCheckBox inside the renderer, and update the model when changes are made. (Note that one drawback is that you'll have a primitive editing mechanism: e.g. the edit is not cancelled if user presses ESC).
As to:
And I do not know how to add a JLabel in the same line of the JTextField
Just let your renderer return a JPanel to which you add the JTextField and the JLabel.

checkbox tree not working as expected

I want to create a tree with given nodes and children. The required behavior is as follows:
"when a node's checkbox is toggled, it's new value (checked/unchecked) should be reflected to all of it's descendants"
Following is the full code, which is not giving expected behavior:
public class CheckBoxTree {
Map<String, DefaultMutableTreeNode> nodes = new HashMap<String, DefaultMutableTreeNode>();
public static void main(final String args[]) {
final CheckBoxTree cbt = new CheckBoxTree();
DefaultMutableTreeNode root = cbt.addNodeWithoutCheckbox(null, "Select divisions");
DefaultMutableTreeNode nodeSTD1 = cbt.addNodeWithCheckbox(root, "STD1", false);
cbt.nodes.put("STD1", nodeSTD1);
DefaultMutableTreeNode nodeDiv1 = cbt.addNodeWithCheckbox(nodeSTD1, "DIV1", false);
cbt.nodes.put("DIV1", nodeDiv1);
DefaultMutableTreeNode nodeDiv2 = cbt.addNodeWithCheckbox(nodeSTD1, "DIV2", false);
cbt.nodes.put("DIV2", nodeDiv2);
root.add(nodeSTD1);
DefaultMutableTreeNode nodeSTD2 = cbt.addNodeWithCheckbox(root, "STD2", false);
cbt.nodes.put("STD2", nodeSTD2);
DefaultMutableTreeNode nodeDiv3 = cbt.addNodeWithCheckbox(nodeSTD2, "DIV3", false);
cbt.nodes.put("DIV3", nodeDiv3);
DefaultMutableTreeNode nodeDiv4 = cbt.addNodeWithCheckbox(nodeSTD2, "DIV4", false);
cbt.nodes.put("DIV4", nodeDiv4);
root.add(nodeSTD2);
final JTree tree = cbt.createCheckBoxTree(root);
// show the tree onscreen
final JFrame frame = new JFrame("CheckBox Tree");
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.add(tree, BorderLayout.CENTER);
JButton button = new JButton("Submit");
panel.add(button, BorderLayout.SOUTH);
final JScrollPane scrollPane = new JScrollPane(panel);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300, 150);
frame.setVisible(true);
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
/*TreePath[] selectionPaths = tree.getSelectionModel().getSelectionPaths();
// TreePath[] selectionPaths = tree.getSelectionPaths();
if (selectionPaths != null) {
System.out.println("Selected paths:");
for (TreePath tp : selectionPaths) {
System.out.println(tp);
}
}*/
System.out.println("Selected paths:");
for (DefaultMutableTreeNode n : cbt.nodes.values()) {
Object obj = n.getUserObject();
if (obj instanceof CheckBoxNode) {
if (((CheckBoxNode) obj).isSelected()) {
System.out.println(n.toString());
}
}
}
}
});
}
private JTree createCheckBoxTree(final DefaultMutableTreeNode root) {
final DefaultTreeModel treeModel = new DefaultTreeModel(root);
final JTree tree = new JTree(treeModel);
final CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
tree.setCellRenderer(renderer);
final CheckBoxNodeEditor editor = new CheckBoxNodeEditor(tree);
tree.setCellEditor(editor);
tree.setEditable(true);
// listen for changes in the model (including check box toggles)
treeModel.addTreeModelListener(new TreeModelListener() {
#Override
public void treeNodesChanged(final TreeModelEvent e) {
System.out.println(System.currentTimeMillis() + ": nodes changed");
DefaultMutableTreeNode node =
(DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) {
return;
}
changeSubTreeSelections(node, null);
}
#Override
public void treeNodesInserted(final TreeModelEvent e) {
System.out.println(System.currentTimeMillis() + ": nodes inserted");
}
#Override
public void treeNodesRemoved(final TreeModelEvent e) {
System.out.println(System.currentTimeMillis() + ": nodes removed");
}
#Override
public void treeStructureChanged(final TreeModelEvent e) {
System.out.println(System.currentTimeMillis() + ": structure changed");
}
});
// listen for changes in the selection
tree.addTreeSelectionListener(new TreeSelectionListener() {
#Override
public void valueChanged(TreeSelectionEvent arg0) {
System.out.println(System.currentTimeMillis() + ": value changed");
/*DefaultMutableTreeNode node =
(DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) {
return;
}
changeSubTreeSelections(node, null);*/
}
});
return tree;
}
protected void changeSubTreeSelections(DefaultMutableTreeNode node, Boolean selected) {
/*change all subtree selection if applicable*/
Object obj = node.getUserObject();
Boolean isSelected = selected;
if (obj instanceof CheckBoxNode) {
CheckBoxNode cbn = (CheckBoxNode) obj;
if (isSelected == null) {
isSelected = cbn.isSelected();
} else {
cbn.setSelected(isSelected);
}
} else {
return;
}
int count = node.getChildCount();
for (int i = 0; i < count; i++) {
DefaultMutableTreeNode child = (DefaultMutableTreeNode) node.getChildAt(i);
changeSubTreeSelections(child, isSelected);
}
}
public DefaultMutableTreeNode addNodeWithCheckbox(
final DefaultMutableTreeNode parent, final String text, final boolean checked) {
final CheckBoxNode data = new CheckBoxNode(text, checked);
final DefaultMutableTreeNode node = new DefaultMutableTreeNode(data);
if (parent != null) {
parent.add(node);
}
return node;
}
public DefaultMutableTreeNode addNodeWithoutCheckbox(
final DefaultMutableTreeNode parent, final String text) {
final DefaultMutableTreeNode node = new DefaultMutableTreeNode(text);
if (parent != null) {
parent.add(node);
}
return node;
}
/*private static DefaultMutableTreeNode add(
final DefaultMutableTreeNode parent, final String text, final boolean checked) {
final CheckBoxNode data = new CheckBoxNode(text, checked);
final DefaultMutableTreeNode node = new DefaultMutableTreeNode(data);
parent.add(node);
nodes.put(text, node);
return node;
}*/
}
class CheckBoxNodeRenderer implements TreeCellRenderer {
private JCheckBox checkBoxNodeRenderer = new JCheckBox();
private DefaultTreeCellRenderer nonCheckBoxNodeRenderer = new DefaultTreeCellRenderer();
private Color selectionBorderColor, selectionForegroundColor, selectionBackgroundColor,
textForegroundColor, textBackgroundColor;
protected JCheckBox getLeafCheckBox() {
return checkBoxNodeRenderer;
}
public CheckBoxNodeRenderer() {
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
checkBoxNodeRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager.get("Tree.drawsFocusBorderAroundIcon");
checkBoxNodeRenderer.setFocusPainted((booleanValue != null)
&& (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForegroundColor = UIManager.getColor("Tree.selectionForeground");
selectionBackgroundColor = UIManager.getColor("Tree.selectionBackground");
textForegroundColor = UIManager.getColor("Tree.textForeground");
textBackgroundColor = UIManager.getColor("Tree.textBackground");
}
#Override
public Component getTreeCellRendererComponent(
JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
Component returnValue;
/*check if it is checkbox object*/
boolean isCheckboxObject = false;
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
if (userObject instanceof CheckBoxNode) {
isCheckboxObject = true;
CheckBoxNode node = (CheckBoxNode) userObject;
checkBoxNodeRenderer.setText(node.getText());
checkBoxNodeRenderer.setSelected(node.isSelected());
}
} else {
String stringValue =
tree.convertValueToText(value, selected, expanded, leaf, row, false);
checkBoxNodeRenderer.setText(stringValue);
checkBoxNodeRenderer.setSelected(false);
}
if (isCheckboxObject) {
checkBoxNodeRenderer.setEnabled(tree.isEnabled());
if (selected) {
checkBoxNodeRenderer.setForeground(selectionForegroundColor);
checkBoxNodeRenderer.setBackground(selectionBackgroundColor);
} else {
checkBoxNodeRenderer.setForeground(textForegroundColor);
checkBoxNodeRenderer.setBackground(textBackgroundColor);
}
returnValue = checkBoxNodeRenderer;
} else {
returnValue =
nonCheckBoxNodeRenderer.getTreeCellRendererComponent(tree, value, selected,
expanded, leaf, row, hasFocus);
}
return returnValue;
}
}
class CheckBoxNodeEditor extends AbstractCellEditor implements TreeCellEditor {
private static final long serialVersionUID = 1L;
private CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
private ChangeEvent changeEvent = null;
private JTree tree;
public CheckBoxNodeEditor(JTree tree) {
this.tree = tree;
}
#Override
public Object getCellEditorValue() {
JCheckBox checkbox = renderer.getLeafCheckBox();
CheckBoxNode checkBoxNode = new CheckBoxNode(checkbox.getText(), checkbox.isSelected());
return checkBoxNode;
}
#Override
public boolean isCellEditable(EventObject event) {
/*uncomment following code to make all nodes editable*/
// return true;
// make all nodes, which are instance of CheckBoxNode, editable
boolean returnValue = false;
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
TreePath path = tree.getPathForLocation(mouseEvent.getX(), mouseEvent.getY());
if (path != null) {
Object node = path.getLastPathComponent();
if ((node != null) && (node instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
Object userObject = treeNode.getUserObject();
returnValue = (userObject instanceof CheckBoxNode);
// returnValue = ((treeNode.isLeaf()) && (userObject
// instanceof CheckBoxNode));
}
}
}
return returnValue;
}
#Override
public Component getTreeCellEditorComponent(
JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row) {
Component editor =
renderer.getTreeCellRendererComponent(tree, value, false, expanded, leaf, row, true);
// editor always selected / focused
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
if (stopCellEditing()) {
fireEditingStopped();
}
}
};
if (editor instanceof JCheckBox) {
((JCheckBox) editor).addItemListener(itemListener);
}
return editor;
}
}
class CheckBoxNode {
private String text;
private boolean selected;
public CheckBoxNode(String text, boolean selected) {
this.text = text;
this.selected = selected;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean newValue) {
selected = newValue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
/*#Override
public String toString() {
return getClass().getName() + "[" + text + "/" + selected + "]";
}*/
#Override
public String toString() {
return text;
}
}
class NamedVector extends Vector<Object> {
private static final long serialVersionUID = 1L;
private String name;
public NamedVector(String name) {
this.name = name;
}
public NamedVector(String name, Object elements[]) {
this.name = name;
for (int i = 0, n = elements.length; i < n; i++) {
add(elements[i]);
}
}
#Override
public String toString() {
return "[" + name + "]";
}
}
The toggling of any parent nodes' checkbox not reflecting correctly in children nodes.
Please help me to understand where the problem is.

add treeDidChange to repaint the tree.
#Override
public void treeNodesChanged(final TreeModelEvent e) {
System.out.println(System.currentTimeMillis() + ": nodes changed");
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) {
return;
}
changeSubTreeSelections(node, null);
tree.treeDidChange();
}
What's more, I found that in the function changeSubTreeSelections, this line isSelected = !(cbn.isSelected()); is incorrect. You shouldn't use ! to get an opposite value.
And maybe it's better that you expand the whole descendants' path, if the parent node is selected.

Java 'CheckBox Node Tree Sample' DefaultMutableNode doesn't have any listener?

I have a problem with adding new nodes to an existing tree. My tree is based on the CheckBoxNodeTreeSample you can see in the link:
http://www.java2s.com/Code/Java/Swing-JFC/CheckBoxNodeTreeSample.htm
I'm simply trying to add a new node by doing the 'standard' thing:
DefaultTreeModel model = (DefaultTreeModel) this.view.getResultTree().getModel();
DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("newNode");
root.add(newNode);
model.reload(root);
This works fine, a new node is added, but the difference from the other existing nodes is that I can't click the checkbox, it's not clickable. I tried to print the path of the new node and an existing node, it looks like this:
newNode
Model.CheckBoxNode[Person,..../true]
I been trying to solve this for some time now, but I can't see how to solve this.. Some help would be appreciated! :)
Should i try to add vectors like this? and might this be why the standard solution doesn't work? Been trying this, but the model doesn't like vectors, objects or anything like that.. Casting isn't working either. This is the initialization of the tree, and how they use vectors and checkboxnodes :
CheckBoxNode accessibilityOptions[] = {
new CheckBoxNode(
"Move system caret with focus/selection changes", false),
new CheckBoxNode("Always expand alt text for images", true) };
CheckBoxNode browsingOptions[] = {
new CheckBoxNode("Notify when downloads complete", true),
new CheckBoxNode("Disable script debugging", true),
new CheckBoxNode("Use AutoComplete", true),
new CheckBoxNode("Browse in a new process", false) };
Vector accessVector = new NamedVector("Accessibility",
accessibilityOptions);
Vector browseVector = new NamedVector("Browsing", browsingOptions);
Object rootNodes[] = { accessVector, browseVector };
Vector rootVector = new NamedVector("Root", rootNodes);
JTree tree = new JTree(rootVector);
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
tree.setCellRenderer(renderer);
tree.setCellEditor(new CheckBoxNodeEditor(tree));
tree.setEditable(true);

Just in case if you didn't find any proper answer, here is a post I asked and answered how to build checkbox tree:
LINK
It might help you

I made an SSCCE. There is a button you can click to add a new node, with a checkbox but it's not clickable. I'm not creating a jcheckbox anywhere, so don't really understand where I should put an extra listener, and don't understand why it doesn't use getTreeCellEditorComponent() in the editor?
I also tried a slightly different approach where I use model.insertNodeInto(), but still I can't click the checkbox. I believe that I should be able to create a checkboxNode instead of a DefaultMutableTreeNode, but the JTree model doesn't want that, therefore trying to cast it to a DefaultMutableTreeNode.. Anyways, thanks for your help so far!
UPDATE:Because the new node is not of type CheckBoxNode. Therefore listeners doesn't work on the nodes. So now I'm looking for solutions to create a CheckBoxNode[], add it to a Vector, and then add that as a node (it that is possible!). That's how the author made the JTree, so I guess something like that could be the answer!
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.event.ChangeEvent;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
public class CheckBoxNodeTreeSample {
private static JTree tree;
public static void main(String args[]) {
JFrame frame = new JFrame("CheckBox Tree");
CheckBoxNode accessibilityOptions[] = {
new CheckBoxNode(
"Move system caret with focus/selection changes", false),
new CheckBoxNode("Always expand alt text for images", true) };
CheckBoxNode browsingOptions[] = {
new CheckBoxNode("Notify when downloads complete", true),
new CheckBoxNode("Disable script debugging", true),
new CheckBoxNode("Use AutoComplete", true),
new CheckBoxNode("Browse in a new process", false) };
Vector accessVector = new NamedVector("Accessibility",
accessibilityOptions);
Vector browseVector = new NamedVector("Browsing", browsingOptions);
Object rootNodes[] = { accessVector, browseVector };
Vector rootVector = new NamedVector("Root", rootNodes);
tree = new JTree(rootVector);
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
tree.setCellRenderer(renderer);
tree.setCellEditor(new CheckBoxNodeEditor(tree));
tree.setEditable(true);
JScrollPane scrollPane = new JScrollPane(tree);
frame.getContentPane().add(scrollPane, BorderLayout.NORTH);
JPanel buttonPanel = new JPanel();
JButton button = new JButton("new node");
buttonPanel.add(button);
frame.getContentPane().add(buttonPanel, BorderLayout.SOUTH);
button.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("New node");
root.add(newNode);
model.reload();
}
});
frame.setSize(300, 450);
frame.setVisible(true);
}
}
class CheckBoxNodeRenderer implements TreeCellRenderer {
private JCheckBox leafRenderer = new JCheckBox();
private DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();
Color selectionBorderColor, selectionForeground, selectionBackground,
textForeground, textBackground;
protected JCheckBox getLeafRenderer() {
return leafRenderer;
}
public CheckBoxNodeRenderer() {
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
leafRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager
.get("Tree.drawsFocusBorderAroundIcon");
leafRenderer.setFocusPainted((booleanValue != null)
&& (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForeground = UIManager.getColor("Tree.selectionForeground");
selectionBackground = UIManager.getColor("Tree.selectionBackground");
textForeground = UIManager.getColor("Tree.textForeground");
textBackground = UIManager.getColor("Tree.textBackground");
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
Component returnValue;
if (leaf) {
String stringValue = tree.convertValueToText(value, selected,
expanded, leaf, row, false);
leafRenderer.setText(stringValue);
leafRenderer.setSelected(false);
leafRenderer.setEnabled(tree.isEnabled());
if (selected) {
leafRenderer.setForeground(selectionForeground);
leafRenderer.setBackground(selectionBackground);
} else {
leafRenderer.setForeground(textForeground);
leafRenderer.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value)
.getUserObject();
if (userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode) userObject;
leafRenderer.setText(node.getText());
leafRenderer.setSelected(node.isSelected());
}
}
returnValue = leafRenderer;
} else {
returnValue = nonLeafRenderer.getTreeCellRendererComponent(tree,
value, selected, expanded, leaf, row, hasFocus);
}
return returnValue;
}
}
class CheckBoxNodeEditor extends AbstractCellEditor implements TreeCellEditor {
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
ChangeEvent changeEvent = null;
JTree tree;
public CheckBoxNodeEditor(JTree tree) {
this.tree = tree;
}
public Object getCellEditorValue() {
JCheckBox checkbox = renderer.getLeafRenderer();
CheckBoxNode checkBoxNode = new CheckBoxNode(checkbox.getText(),
checkbox.isSelected());
return checkBoxNode;
}
public boolean isCellEditable(EventObject event) {
boolean returnValue = false;
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
TreePath path = tree.getPathForLocation(mouseEvent.getX(),
mouseEvent.getY());
if (path != null) {
Object node = path.getLastPathComponent();
if ((node != null) && (node instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
Object userObject = treeNode.getUserObject();
returnValue = ((treeNode.isLeaf()) && (userObject instanceof CheckBoxNode));
}
}
}
return returnValue;
}
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row) {
Component editor = renderer.getTreeCellRendererComponent(tree, value,
true, expanded, leaf, row, true);
// editor always selected / focused
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
if (stopCellEditing()) {
fireEditingStopped();
}
}
};
if (editor instanceof JCheckBox) {
((JCheckBox) editor).addItemListener(itemListener);
}
return editor;
}
}
class CheckBoxNode {
String text;
boolean selected;
public CheckBoxNode(String text, boolean selected) {
this.text = text;
this.selected = selected;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean newValue) {
selected = newValue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
public String toString() {
return getClass().getName() + "[" + text + "/" + selected + "]";
}
}
class NamedVector extends Vector {
String name;
public NamedVector(String name) {
this.name = name;
}
public NamedVector(String name, Object elements[]) {
this.name = name;
for (int i = 0, n = elements.length; i < n; i++) {
add(elements[i]);
}
}
public String toString() {
return "[" + name + "]";
}
}

Check Box Node Tree , Custom renderer in Swing

I have been trying to implement a CheckBox Node Tree, where the parent nodes also have checkbox.
I have been able to achieve the structure .
But when i try to implement the CellEditor , i am not able to check the leaf nodes .The parent nodes are checkable , but not the leaf nodes. Please give me some guidance .
/**
*CheckBoxNodeRenderer.java
*/
public class CheckBoxNodeRenderer implements TreeCellRenderer{
public JCheckBox getLeafRenderer()
{
return leafRenderer;
}
public CheckBoxNodeRenderer()
{
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
leafRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager
.get("Tree.drawsFocusBorderAroundIcon");
leafRenderer.setFocusPainted((booleanValue != null)
&& (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForeground = UIManager.getColor("Tree.selectionForeground");
selectionBackground = UIManager.getColor("Tree.selectionBackground");
textForeground = UIManager.getColor("Tree.textForeground");
textBackground = UIManager.getColor("Tree.textBackground");
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus)
{
Component returnValue;
if (leaf) {
String stringValue = tree.convertValueToText(value, selected,
expanded, leaf, row, false);
if (selected) {
leafRenderer.setForeground(selectionForeground);
leafRenderer.setBackground(selectionBackground);
} else {
leafRenderer.setForeground(textForeground);
leafRenderer.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value)
.getUserObject();
if (userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode) userObject;
leafRenderer.setText(node.getText());
leafRenderer.setSelected(node.isSelected());
}
}
returnValue = leafRenderer;
} else {
leafRenderer.setText(value.toString());
leafRenderer.setSelected(selected);
returnValue = leafRenderer;
}
return returnValue;
}
public JCheckBox leafRenderer = new JCheckBox();
private DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();
Color selectionBorderColor, selectionForeground, selectionBackground,
textForeground, textBackground;
}
The code below is the checkBoxNodeEditor.java
/**
*CheckBoxNodeEditor.java
*/
public class CheckBoxNodeEditor extends AbstractCellEditor implements TreeCellEditor {
public CheckBoxNodeEditor(JTree tree) {
this.tree = tree;
}
/**
* Checkbox node editor for node selection
*/
public Object getCellEditorValue() {
GenerateCube.nodeselection();
return GenerateCube.selectNode;
}
/**
* Cell Editable
*/
public boolean isCellEditable(EventObject event) {
boolean returnValue = false;
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
path = tree.getPathForLocation(mouseEvent.getX(),
mouseEvent.getY());
model = (DefaultTreeModel) (tree.getModel());
if (path != null) {
if(path.getChildCount > 0) {
Object node = path.getPathComponent(0);
}
else{
Object node = path.getLastPathComponent();
}
Object node = path.getLastPathComponent();
if ((node != null) && (node instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
Object userObject = treeNode.getUserObject();
returnValue = ((treeNode.isLeaf()) && (userObject instanceof CheckBoxNode));
}
}
}
return returnValue;
}
/**
* getting Tree Cell Editor Component
*/
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row) {
Component editor = GenerateCube.renderer.getTreeCellRendererComponent(tree, value,
true, expanded, leaf, row, true);
// editor always selected / focused
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
if (stopCellEditing()) {
fireEditingStopped();
}
} };
if (editor instanceof JCheckBox) {
((JCheckBox) editor).addItemListener(itemListener);
}
return editor;
}
static int n;
public static JTree tree;
static DefaultTreeModel model ;
ChangeEvent changeEvent = null;
public static TreePath path ;
public static String parentstring;
public static DefaultMutableTreeNode nNode;
public static MutableTreeNode node;
String nodeName;
}

maybe this code can help you with TreeCellEditor/Renderer
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.*;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.ChangeEvent;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeCellEditor;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
//import org.pushingpixels.substance.api.skin.SubstanceOfficeSilver2007LookAndFeel;
public class CheckBoxNodeTreeSample {
public static void main(String args[]) {
JFrame frame = new JFrame("CheckBox Tree");
//setLookAndFeel();
CheckBoxNode accessibilityOptions[] = {new CheckBoxNode(
"Move system caret with focus/selection changes", false),
new CheckBoxNode("Always expand alt text for images", true)};
CheckBoxNode browsingOptions[] = {
new CheckBoxNode("Notify when downloads complete", true),
new CheckBoxNode("Disable script debugging", true),
new CheckBoxNode("Use AutoComplete", true),
new CheckBoxNode("Browse in a new process", false)};
Vector accessVector = new NamedVector("Accessibility",
accessibilityOptions);
Vector browseVector = new NamedVector("Browsing", browsingOptions);
Object rootNodes[] = {accessVector, browseVector};
Vector rootVector = new NamedVector("Root", rootNodes);
JTree tree = new JTree(rootVector);
CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
tree.setCellRenderer(renderer);
tree.setCellEditor(new CheckBoxNodeEditor(tree));
tree.setEditable(true);
JScrollPane scrollPane = new JScrollPane(tree);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
private static void setLookAndFeel() {
/*SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
//UIManager.setLookAndFeel(new SubstanceAutumnLookAndFeel());
UIManager.setLookAndFeel(new SubstanceOfficeSilver2007LookAndFeel());
} catch (UnsupportedLookAndFeelException e) {
throw new RuntimeException(e);
}
}
});*/
}
}
class CheckBoxNodeRenderer implements TreeCellRenderer {
private JCheckBox leafRenderer = new JCheckBox();
private DefaultTreeCellRenderer nonLeafRenderer = new DefaultTreeCellRenderer();
private Color selectionBorderColor, selectionForeground, selectionBackground,
textForeground, textBackground;
protected JCheckBox getLeafRenderer() {
return leafRenderer;
}
public CheckBoxNodeRenderer() {
Font fontValue;
fontValue = UIManager.getFont("Tree.font");
if (fontValue != null) {
leafRenderer.setFont(fontValue);
}
Boolean booleanValue = (Boolean) UIManager.get("Tree.drawsFocusBorderAroundIcon");
leafRenderer.setFocusPainted((booleanValue != null) && (booleanValue.booleanValue()));
selectionBorderColor = UIManager.getColor("Tree.selectionBorderColor");
selectionForeground = UIManager.getColor("Tree.selectionForeground");
selectionBackground = UIManager.getColor("Tree.selectionBackground");
textForeground = UIManager.getColor("Tree.textForeground");
textBackground = UIManager.getColor("Tree.textBackground");
}
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
Component returnValue;
if (leaf) {
String stringValue = tree.convertValueToText(value, selected,
expanded, leaf, row, false);
leafRenderer.setText(stringValue);
leafRenderer.setSelected(false);
leafRenderer.setEnabled(tree.isEnabled());
if (selected) {
leafRenderer.setForeground(selectionForeground);
leafRenderer.setBackground(selectionBackground);
} else {
leafRenderer.setForeground(textForeground);
leafRenderer.setBackground(textBackground);
}
if ((value != null) && (value instanceof DefaultMutableTreeNode)) {
Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
if (userObject instanceof CheckBoxNode) {
CheckBoxNode node = (CheckBoxNode) userObject;
leafRenderer.setText(node.getText());
leafRenderer.setSelected(node.isSelected());
}
}
returnValue = leafRenderer;
} else {
returnValue = nonLeafRenderer.getTreeCellRendererComponent(tree,
value, selected, expanded, leaf, row, hasFocus);
}
return returnValue;
}
}
private class CheckBoxNodeEditor extends AbstractCellEditor implements TreeCellEditor {
private CheckBoxNodeRenderer renderer = new CheckBoxNodeRenderer();
private ChangeEvent changeEvent = null;
private JTree tree;
public CheckBoxNodeEditor(JTree tree) {
this.tree = tree;
}
public Object getCellEditorValue() {
JCheckBox checkbox = renderer.getLeafRenderer();
CheckBoxNode checkBoxNode = new CheckBoxNode(checkbox.getText(),
checkbox.isSelected());
return checkBoxNode;
}
#Override
public boolean isCellEditable(EventObject event) {
boolean returnValue = false;
if (event instanceof MouseEvent) {
MouseEvent mouseEvent = (MouseEvent) event;
TreePath path = tree.getPathForLocation(mouseEvent.getX(),
mouseEvent.getY());
if (path != null) {
Object node = path.getLastPathComponent();
if ((node != null) && (node instanceof DefaultMutableTreeNode)) {
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node;
Object userObject = treeNode.getUserObject();
returnValue = ((treeNode.isLeaf()) && (userObject instanceof CheckBoxNode));
}
}
}
return returnValue;
}
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row) {
Component editor = renderer.getTreeCellRendererComponent(tree, value,
true, expanded, leaf, row, true);
// editor always selected / focused
ItemListener itemListener = new ItemListener() {
public void itemStateChanged(ItemEvent itemEvent) {
if (stopCellEditing()) {
fireEditingStopped();
}
}
};
if (editor instanceof JCheckBox) {
((JCheckBox) editor).addItemListener(itemListener);
}
return editor;
}
}
class CheckBoxNode {
private String text;
private boolean selected;
public CheckBoxNode(String text, boolean selected) {
this.text = text;
this.selected = selected;
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean newValue) {
selected = newValue;
}
public String getText() {
return text;
}
public void setText(String newValue) {
text = newValue;
}
#Override
public String toString() {
return getClass().getName() + "[" + text + "/" + selected + "]";
}
}
class NamedVector extends Vector {
private String name;
public NamedVector(String name) {
this.name = name;
}
public NamedVector(String name, Object elements[]) {
this.name = name;
for (int i = 0, n = elements.length; i < n; i++) {
add(elements[i]);
}
}
#Override
public String toString() {
return "[" + name + "]";
}
}

Subclass of TreeNode DnD issue

I have a class structure as follows:
DefaultMutableTreeNode
|_
BCStructure
|_
| Module
|_
| Section
|_
Page
Module, Section, and Page are what I actually use in my JTree. If you run the sample code below, the drag and drop works. Notice it is using DefaultMutableTreeNodes. If however, I place the code in my real applicaiont which uses the subclasses of DefualtMutableTreeNode, it does not work.
While stepping through the code, I have noticed two areas of interest. The first is this:
class TreeTransferHandler extends TransferHandler {
DataFlavor nodesFlavor;
DataFlavor[] flavors = new DataFlavor[1];
DefaultMutableTreeNode[] nodesToRemove;
public TreeTransferHandler() {
try {
String mimeType = DataFlavor.javaJVMLocalObjectMimeType
+ ";class=\""
+ javax.swing.tree.DefaultMutableTreeNode[].class.getName()
+ "\"";
nodesFlavor = new DataFlavor(mimeType);
flavors[0] = nodesFlavor;
} catch (ClassNotFoundException e) {
System.out.println("ClassNotFound: " + e.getMessage());
}
}
This is where it sets the DataFlavor. It is setting it to a DefualtMutableTreeNode array which I assume is correct since DefaultMutableTreeNode is the super class of my nodes. But this was one area where I thought the problem could lie.
The other point is while debugging this code, I get as far as:
public DataFlavor[] getTransferDataFlavors() {
return flavors;
}
before the drag and drop fails. I assume that it returns a DataFlavor that is not liked to well. This is why I think there is something wrong with the DataFlavor. Is there something more I need to do/modify in order for this to work with subclasses? Any ideas or suggestions?
Thanks!
Complete sample code:
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.tree.*;
public class TreeDragAndDrop {
private JScrollPane getContent() {
JTree tree = new JTree();
tree.setDragEnabled(true);
tree.setDropMode(DropMode.ON_OR_INSERT);
tree.setTransferHandler(new TreeTransferHandler());
tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);
expandTree(tree);
return new JScrollPane(tree);
}
private void expandTree(JTree tree) {
DefaultMutableTreeNode root =
(DefaultMutableTreeNode)tree.getModel().getRoot();
Enumeration e = root.breadthFirstEnumeration();
while(e.hasMoreElements()) {
DefaultMutableTreeNode node =
(DefaultMutableTreeNode)e.nextElement();
if(node.isLeaf()) continue;
int row = tree.getRowForPath(new TreePath(node.getPath()));
tree.expandRow(row);
}
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new TreeDragAndDrop().getContent());
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
}
}
class TreeTransferHandler extends TransferHandler {
DataFlavor nodesFlavor;
DataFlavor[] flavors = new DataFlavor[1];
DefaultMutableTreeNode[] nodesToRemove;
public TreeTransferHandler() {
try {
String mimeType = DataFlavor.javaJVMLocalObjectMimeType +
";class=\"" +
javax.swing.tree.DefaultMutableTreeNode[].class.getName() +
"\"";
nodesFlavor = new DataFlavor(mimeType);
flavors[0] = nodesFlavor;
} catch(ClassNotFoundException e) {
System.out.println("ClassNotFound: " + e.getMessage());
}
}
public boolean canImport(TransferHandler.TransferSupport support) {
if(!support.isDrop()) {
return false;
}
support.setShowDropLocation(true);
if(!support.isDataFlavorSupported(nodesFlavor)) {
return false;
}
// Do not allow a drop on the drag source selections.
JTree.DropLocation dl =
(JTree.DropLocation)support.getDropLocation();
JTree tree = (JTree)support.getComponent();
int dropRow = tree.getRowForPath(dl.getPath());
int[] selRows = tree.getSelectionRows();
for(int i = 0; i 0 &&
target.getLevel() 0 && selRows.length == 1)
return false;
// first may have children.
for(int i = 1; i selRows.length-1) {
// Not all children of first are selected.
return false;
}
}
}
return true;
}
protected Transferable createTransferable(JComponent c) {
JTree tree = (JTree)c;
TreePath[] paths = tree.getSelectionPaths();
if(paths != null) {
// Make up a node array of copies for transfer and
// another for/of the nodes that will be removed in
// exportDone after a successful drop.
List copies =
new ArrayList();
List toRemove =
new ArrayList();
DefaultMutableTreeNode node =
(DefaultMutableTreeNode)paths[0].getLastPathComponent();
DefaultMutableTreeNode copy = copy(node);
copies.add(copy);
toRemove.add(node);
for(int i = 1; i node.getLevel()) { // child node
copy.add(copy(next));
// node already contains child
} else { // sibling
copies.add(copy(next));
toRemove.add(next);
}
}
DefaultMutableTreeNode[] nodes =
copies.toArray(new DefaultMutableTreeNode[copies.size()]);
nodesToRemove =
toRemove.toArray(new DefaultMutableTreeNode[toRemove.size()]);
return new NodesTransferable(nodes);
}
return null;
}
/** Defensive copy used in createTransferable. */
private DefaultMutableTreeNode copy(TreeNode node) {
return new DefaultMutableTreeNode(node);
}
protected void exportDone(JComponent source, Transferable data, int action) {
if((action & MOVE) == MOVE) {
JTree tree = (JTree)source;
DefaultTreeModel model = (DefaultTreeModel)tree.getModel();
// Remove nodes saved in nodesToRemove in createTransferable.
for(int i = 0; i

If you think the problem is that you subclass the DefaultMutableTreeNode, try making your DataFlavor to be an array of Object, or even better, an ArrayList:
DataFlavor.javaJVMLocalObjectMimeType + ";class=java.util.ArrayList"
This way you can return your copies list along with your transferable. Maybe it will avoid the problem.
here's a rough scetch of how to do this with lists:
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;
import java.util.*;
import java.util.List;
/**
* Author: Denis Tulskiy
* Date: 1/5/11
*/
public class Test extends JFrame {
class NodeA extends DefaultMutableTreeNode {
NodeA(Object userObject) {
super(userObject);
}
}
class NodeB extends DefaultMutableTreeNode {
NodeB(Object userObject) {
super(userObject);
}
}
class NodeC extends DefaultMutableTreeNode {
NodeC(Object userObject) {
super(userObject);
}
}
private static class MyTransferHandler extends TransferHandler {
#Override
public int getSourceActions(JComponent c) {
return MOVE;
}
#Override
protected Transferable createTransferable(JComponent c) {
JTree tree = (JTree) c;
ArrayList<TreeNode> nodes = new ArrayList<TreeNode>();
for (TreePath path : tree.getSelectionPaths()) {
DefaultMutableTreeNode component = (DefaultMutableTreeNode) path.getLastPathComponent();
nodes.add(component);
}
return new NodesTransferable(nodes);
}
#Override
public boolean canImport(TransferSupport support) {
return support.isDataFlavorSupported(NodesTransferable.getDataFlavor());
}
#Override
public boolean importData(TransferSupport support) {
if (!canImport(support)) {
return false;
}
JTree tree = (JTree) support.getComponent();
List<DefaultMutableTreeNode> data = null;
try {
data = (List<DefaultMutableTreeNode>) support.getTransferable().getTransferData(NodesTransferable.getDataFlavor());
} catch (UnsupportedFlavorException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (data != null) {
Point dropPoint = support.getDropLocation().getDropPoint();
TreePath path = tree.getPathForLocation(dropPoint.x, dropPoint.y);
DefaultMutableTreeNode parent = (DefaultMutableTreeNode) path.getLastPathComponent();
for (DefaultMutableTreeNode node : data) {
node.removeFromParent();
parent.add(node);
}
DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
model.reload();
}
return true;
}
}
static class NodesTransferable implements Transferable {
private static DataFlavor dataFlavor;
public static DataFlavor getDataFlavor() {
if (dataFlavor == null) {
try {
dataFlavor = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + ";class=java.util.ArrayList");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
return dataFlavor;
}
private java.util.List<TreeNode> nodes;
NodesTransferable(List<TreeNode> nodes) {
this.nodes = nodes;
}
#Override
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[]{getDataFlavor()};
}
#Override
public boolean isDataFlavorSupported(DataFlavor flavor) {
return flavor.match(dataFlavor);
}
#Override
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
return nodes;
}
}
public Test() {
JTree tree = new JTree();
tree.setDragEnabled(true);
tree.setDropMode(DropMode.ON_OR_INSERT);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
NodeA child = new NodeA("nodea");
root.add(child);
child.add(new NodeB("nodeb"));
child.add(new NodeC("nodec"));
tree.setModel(new DefaultTreeModel(root));
tree.setTransferHandler(new MyTransferHandler());
setLayout(new BorderLayout());
add(tree, BorderLayout.CENTER);
setSize(300, 400);
setLocationRelativeTo(null);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new Test().setVisible(true);
}
}