Disabling JTree in a JScrollPane.
Greetings,
I'm trying to figure out how to disable a Jtree that is inside a JScrollPane. I've tried using setEnable(false) but it doesn't even phase it, its still enabled (I can expand branches and its not greyed out) . I've tried setting the JScrollPane to setEnable(false) but once again nothing really changed. The only thing I can think of is that using setEnable(false) is not propigating to the cell renderers for the JTree for some reason. Is there a way to disable the JTree without writing a custom renderer?
Also make sure that the JScrollBars are set to not focus.
Similar Messages
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Hi,
I have a JTree, wrapped into a JScrollPane. The tree has some nodes, which have no childs, but they are shown as nodes, instead of leafes. If the user tries to open such a "node", the node turns into a leaf and the JScrollPane scrolls to the right, till the node, which turns to a leaf, is at the left border of the JScrollPane.
This effect is done by Java itself. To get rid of it, I filled the "treeExpanded()" method with following line:
getHorizontalScrollBar().setValue(0);
to reset the JScrollPane. If a real node is expanded, the JScrollPane scrolls automatically to the left. But if the node, which is in reality a leaf, is expanded, the JScrollPane scrolls to the left and is set by anything (Java) to the wrong position again.
Unfortunatly it is not possible to verify the childs of all nodes, while creating the tree.
Does anybody knows how to solve this problem?No ideas?
Any help is appreciated. -
Disable JTree and stop it from receiving mouse events
Hi,
I have a JTree which has a mouse listener associated with (which is used for right-click operations)..,..anyway I am trying to disable the tree, so I call setEnabled(false)...which, as documented, disables the tree but it will still receive mouse events. I also tried, setEditable(false)..... the only way I can think of is to remove the mouse listener, and then when I want to re-enable the tree, I have to add it back.
is there some other way?
thanksHi,
I have a JTree which has a mouse listener
ner associated with (which is used for right-click
operations)..,..anyway I am trying to disable the
tree, so I call setEnabled(false)...which, as
documented, disables the tree but it will still
receive mouse events. I also tried,
setEditable(false)..... the only way I can think of
is to remove the mouse listener, and then when I want
to re-enable the tree, I have to add it back.
is there some other way?Why do you want another way? This seems like a perfectly viable way to accomplish what you want. -
JTree custom renderer - JScrollPane
Hi,
I am building a JTree and need a custom renderer that will allow me to display the contents of certain leaf nodes in a JEditorPane that is contained in a scrollpane as the leaf may contain a varying amount of text.
I have managed to get a renderer displaying the text as expected however the scrollbars do not work as I hoped - I cannot scroll down the editorpane.
Has anyone got an example of a renderer that uses a scrollpane, any help/suggestions would be gratefully received.
ThanksReturn the size of your editor pane in customized cell renderer's getPreferredSize() method and set JTree rowHeight to zero. When row height is 0, it use renderer's getPreferredSize() to get size of the cell, I think. I have made custom cellrenderer which extends Jpanel and in getCellRendererComponent I add there another panel which contains buttons etc. I have used super.getPreferredSize() in my renderer's getPreferredSize() method.
-
Disabling JTextArea in a JScrollPane
Hello,
I have an application that contains some JTextFields
and a JScrollPane with a JTextArea as the viewport.
The JTextArea is readonly for displaying messages with
setEnable to false (setEditable and setFocusable are also false).
The problem is that I can tab thru the fields fine,
skipping over the scroll pane, however as soon as a
message is deposited in the scroll pane things
screw up. What happens is that as I tab
down to the scroll pane, I loose my cursor and I
have to tab again to get it back. It is like it gets lost when I try to tab past scroll pane.
Is it possible that something is being added to the focus
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Thanks in Advance
KarlBHAlso make sure that the JScrollBars are set to not focus.
-
Removing a JTree from a JScrollPane
I am working with an awt Applet but i need to use a JTree.
When the user press a button a need to remove the JTree from its container but it doesn't work
I try this:
jscroll.remove(jtree);
jscroll.updateUI();
jtree = null;
repaint();
Can anybody help me, please.Thank you.
Another question:
I have a jtable with multiple spanded cells. I am using a custom jtable(the code is in http://www2.gol.com/users/tame/swing/examples/JTableExamples4.html) but i need insert a new row when you click on a button.
I doing this:
jtable.getModel().addRow(vector);
but it throws an exception:
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: 11 >= 11
at java.util.Vector.elementAt(Unknown Source)
at javax.swing.table.DefaultTableModel.getValueAt(Unknown Source)
at javax.swing.JTable.getValueAt(Unknown Source)
at javax.swing.JTable.prepareRenderer(Unknown Source)
at jp.gr.java_conf.tame.swing.table.MultiSpanCellTableUI.paintCell(MultiSpanCellTableUI.java:96)
at jp.gr.java_conf.tame.swing.table.MultiSpanCellTableUI.paintRow(MultiSpanCellTableUI.java:68)
at jp.gr.java_conf.tame.swing.table.MultiSpanCellTableUI.paint(MultiSpanCellTableUI.java:39)
at javax.swing.plaf.ComponentUI.update(Unknown Source)
at javax.swing.JComponent.paintComponent(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JViewport.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintWithBuffer(Unknown Source)
at javax.swing.JComponent._paintImmediately(Unknown Source)
at javax.swing.JComponent.paintImmediately(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Can anybody help me -
JTree in JScrollPane doesn't scroll
I have a JTree in a JScrollPane that doesn't scroll.
Background: it used to!
History: I moved the creation of the JTree to inside an Object that returns it with a ".getTree()" method. Since then, it hasn't been scrolling. I even set the JScrollPane to always have scrollbars and they just sit there inactive.
Does anyone know what this would happen and/or how to fix it?
thanks.That actaully worked, but it was way to big. I'm not sure what I did, but I changed the values to Studio ONE's defaults and now it works ok.
-
JTree in JScrollpane, find out
I have following constellation:
A JTree in a JScrollpane with a vertical scrollbar.
Most nodes are hidden "behind the scrollpane" and only view are seen.
I search for a property which signals if a node is currently seen on screen and which are "scrolled" (that means those nodes which aren't visible) (the jcomponent method isVisible() doesn't work)
I think about such a method which uses the information of the scrollbarposition and the dimension of the jviewport but i can't get the information which node is seen if some nodes are expanded and some are collapsed.
Does anybody know such a property or method?
Or is there a SWING-THING which solves the problem?
Thank you for your answersisVisible() is a "Component-Method" which means i have to take the rendered component finding out the visible nodes.
my application is following:
i write a method which expand all nodes until the leafs are visible but because of performance (i have more than 1000 nodes directly under the root) i want to expand only the nodes which are showing and expand the other later. -
JTree in JScrollPane not resizing after model change.
I have a JTree in a JScrollPane that's put in a JPanel using the JGoodies FormLayout as it's layout manager. The column definition defines the column to grow so the JScrollPane should have enough space. The tree is empty when I create it and put it in the JScrollPane.
After adding some nodes to the tree the JScrollPane does not resize automatically, it only resizes when a forced repaint occurs (moving or resizing the window , etc).
I've tried calling invalidate(), repaint(),revalidate() on both the JTree and the JScrollPane. I also do a reload() on the TreeModel after adding the nodes (which is probably unnecessary as I use insertNodeInto(node,parent,position) from the DefaultTreeModel to add the new nodes).
Anybody knows what I'm missing here?
Thanks a lot in advance !Update:
The card is running now. I had another Arch system (arch2) on the same network (to compare with), and after I shut that down and rebooted the first one (arch1) the network interfaces show up, both lo and eth0.
However, the startup routine hangs about 2-3 minutes on the network daemon (with blinking router lights and hdd activity), so it's still not perfect. Another thing is that I can't get the right gateway from the router's dhcp. Here's an overview of the setup:
Home: 192.168.2.x
arch1 .2.102-------|
|
arch2 .2.101-------| old SMC router: .2.1
|
fritzbox .2.2 -----|
router/modem
|
|
~~~~~
internet
The gateway is supposed to be the fritzbox with ip 192.168.2.2. The old SMC router serves addresses in the range .2.101-110. I set it up this way because I need the 8 ports on the SMC (and I like watching the lights).
Here's my /etc/rc.conf for both systems:
arch1 (starts slow):
eth0="dhcp"
ROUTES=(!gateway)
arch2 (working):
eth0="eth0 192.168.2.101 netmask 255.255.255.0 broadcast 192.168.2.255"
gateway="default gw 192.168.2.2"
ROUTES=(gateway)
arch1 gets the SMC as gateway, arch2 gets the fritzbox.
Ideally all computers on the network should get their IPs from the SMC dhcp, which also gives them the fritzbox as gateway. But that just doesn't work for the arch1. arch2 and the windows PCs get online just fine.
I had also tried setting arch1 the same as arch2 except for the ip=2.102. Then the network starts faster, but the gateway is still stuck at the SMC router -> no internet.
Rather complicated, but what are networks for? Anyone see daylight in this mess?
Last edited by bitpal (2009-08-13 21:24:02) -
JTree in JScrollPane incorrect scrolling
Hi,
I have a JTree in a JScrollPane, when I scroll (programatically) in the JTree using the setAnchorSelectionPath method of the JTree some scrolling occurs but not enough to bring the leaf node of the JTree into the visible viewport.
Any suggestions,
MarkCheers for the pointer, I am not attempting drag and drop though ....
I have a selected leaf node in the tree and then I change the type of sort I use on the data in the tree, I find the new leaf node, expand the path down to it and then attempt to scroll.
Thus no pointer information to use with <i>Autoscroll</i>
Mark -
Display JTree in browser using JSP
i have a program that converts xml file in to tree structure(using Swing). When i run this using eclipse then it is working. Swing is an extension of applet , right. I want to embed this in an HTML page(JSP). so that i can display the tree structure. Its gives class not foung error.
It is not posiible to embed it. I think if it extends an Applet then it will display. But i don't know how to convert that. It gives error if i convert.
pls help
CODE:
package TreeGen;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import java.io.IOException;
import org.w3c.dom.Document;
// Basic GUI components
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
// GUI components for right-hand side
import javax.swing.JSplitPane;
import javax.swing.JEditorPane;
// GUI support classes
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
// For creating borders
import javax.swing.border.EmptyBorder;
import javax.swing.border.BevelBorder;
import javax.swing.border.CompoundBorder;
// For creating a TreeModel
import javax.swing.tree.*;
import javax.swing.event.*;
import java.util.*;
public class TreeGen extends JPanel
static Document document;
boolean compress = false;
static final int windowHeight = 660;
static final int leftWidth = 300;
static final int rightWidth = 640;
static final int windowWidth = leftWidth + rightWidth;
public TreeGen()
EmptyBorder eb = new EmptyBorder(5,5,5,5);
BevelBorder bb = new BevelBorder(BevelBorder.LOWERED);
CompoundBorder cb = new CompoundBorder(eb,bb);
this.setBorder(new CompoundBorder(cb,eb));
JTree tree = new JTree(new DomToTreeModelAdapter());
JScrollPane treeView = new JScrollPane(tree);
treeView.setPreferredSize(
new Dimension( leftWidth, windowHeight ));
final
JEditorPane htmlPane = new JEditorPane("text/html","");
htmlPane.setEditable(true);
JScrollPane htmlView = new JScrollPane(htmlPane);
htmlView.setPreferredSize(
new Dimension( rightWidth, windowHeight ));
tree.addTreeSelectionListener(
new TreeSelectionListener()
public void valueChanged(TreeSelectionEvent e)
TreePath p = e.getNewLeadSelectionPath();
if (p != null)
AdapterNode adpNode =
(AdapterNode) p.getLastPathComponent();
htmlPane.setText(adpNode.content());
JSplitPane splitPane =
new JSplitPane( JSplitPane.HORIZONTAL_SPLIT,
treeView,
htmlView );
splitPane.setContinuousLayout( false );
splitPane.setDividerLocation( leftWidth );
splitPane.setDividerSize(1);
splitPane.setPreferredSize(
new Dimension( windowWidth + 10, windowHeight+10 ));
this.setLayout(new BorderLayout());
this.add("Center", splitPane );
//return menuBar;
} // constructor
public static void main(String argv[])
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
try {
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.parse("C:/Program Files/Apache Software Foundation/Tomcat 5.0/webapps/parser1/sample.xml");
makeFrame();
} catch (SAXException sxe){
System.out.println("ERROR");
Exception x = sxe;
if (sxe.getException() != null)
x = sxe.getException();
x.printStackTrace();
} catch (ParserConfigurationException pce) {
pce.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
} // main
public static void makeFrame()
JFrame frame = new JFrame("DOM Echo");
frame.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
final TreeGen echoPanel =
new TreeGen();
frame.getContentPane().add("Center", echoPanel );
frame.pack();
Dimension screenSize =
Toolkit.getDefaultToolkit().getScreenSize();
int w = windowWidth + 10;
int h = windowHeight + 10;
frame.setSize(w, h);
frame.setVisible(true);
} // makeFrame
static final String[] typeName = {
"none",
"Element",
"Attr",
"Text",
"CDATA",
"EntityRef",
"Entity",
"ProcInstr",
"Comment",
"Document",
"DocType",
"DocFragment",
"Notation",
static final int ELEMENT_TYPE = 1;
static final int ATTR_TYPE = 2;
static final int TEXT_TYPE = 3;
static final int CDATA_TYPE = 4;
static final int ENTITYREF_TYPE = 5;
static final int ENTITY_TYPE = 6;
static final int PROCINSTR_TYPE = 7;
static final int COMMENT_TYPE = 8;
static final int DOCUMENT_TYPE = 9;
static final int DOCTYPE_TYPE = 10;
static final int DOCFRAG_TYPE = 11;
static final int NOTATION_TYPE = 12;
static String[] treeElementNames = {
"slideshow",
"slide",
"title", // For slideshow #1
"slide-title", // For slideshow #10
"item",
boolean treeElement(String elementName) {
for (int i=0; i<treeElementNames.length; i++) {
//System.out.println(treeElementNames);
if ( elementName.equals(treeElementNames[i]) )
return true;
return false;
public class AdapterNode
org.w3c.dom.Node domNode;
public AdapterNode(org.w3c.dom.Node node)
domNode = node;
public String toString()
String s = typeName[domNode.getNodeType()];
String nodeName = domNode.getNodeName();
if (! nodeName.startsWith("#"))
s += ": " + nodeName;
if (compress)
String t = content().trim();
int x = t.indexOf("\n");
if (x >= 0) t = t.substring(0, x);
s += " " + t;
return s;
if (domNode.getNodeValue() != null)
if (s.startsWith("ProcInstr"))
s += ", ";
else
s += ": ";
// Trim the value to get rid of NL's at the front
String t = domNode.getNodeValue().trim();
int x = t.indexOf("\n");
if (x >= 0) t = t.substring(0, x);
s += t;
return s;
public String content()
String s = "";
org.w3c.dom.NodeList nodeList = domNode.getChildNodes();
for (int i=0; i<nodeList.getLength(); i++)
org.w3c.dom.Node node = nodeList.item(i);
int type = node.getNodeType();
//System.out.println(type);
AdapterNode adpNode = new AdapterNode(node); //inefficient, but works
if (type == ELEMENT_TYPE)
if ( treeElement(node.getNodeName()) ) continue;
s += "<" + node.getNodeName() + ">";
s += adpNode.content();
s += "</" + node.getNodeName() + ">";
else if (type == TEXT_TYPE)
s += node.getNodeValue();
else if (type == ENTITYREF_TYPE)
s += adpNode.content();
else if (type == CDATA_TYPE)
StringBuffer sb = new StringBuffer( node.getNodeValue() );
for (int j=0; j<sb.length(); j++)
if (sb.charAt(j) == '<')
sb.setCharAt(j, '&');
sb.insert(j+1, "lt;");
j += 3;
else if (sb.charAt(j) == '&')
sb.setCharAt(j, '&');
sb.insert(j+1, "amp;");
j += 4;
s += "<pre>" + sb + "\n</pre>";
return s;
public int index(AdapterNode child)
int count = childCount();
for (int i=0; i<count; i++)
AdapterNode n = this.child(i);
if (child.domNode == n.domNode) return i;
return -1; // Should never get here.
public AdapterNode child(int searchIndex)
org.w3c.dom.Node node =
domNode.getChildNodes().item(searchIndex);
if (compress)
int elementNodeIndex = 0;
for (int i=0; i<domNode.getChildNodes().getLength(); i++)
node = domNode.getChildNodes().item(i);
if (node.getNodeType() == ELEMENT_TYPE
&& treeElement( node.getNodeName() )
&& elementNodeIndex++ == searchIndex)
break;
return new AdapterNode(node);
public int childCount()
if (!compress)
return domNode.getChildNodes().getLength();
int count = 0;
for (int i=0; i<domNode.getChildNodes().getLength(); i++)
org.w3c.dom.Node node = domNode.getChildNodes().item(i);
if (node.getNodeType() == ELEMENT_TYPE
&& treeElement( node.getNodeName() ))
++count;
return count;
public class DomToTreeModelAdapter
implements javax.swing.tree.TreeModel
public Object getRoot()
return new AdapterNode(document);
public boolean isLeaf(Object aNode)
AdapterNode node = (AdapterNode) aNode;
if (node.childCount() > 0) return false;
return true;
public int getChildCount(Object parent)
AdapterNode node = (AdapterNode) parent;
return node.childCount();
public Object getChild(Object parent, int index)
AdapterNode node = (AdapterNode) parent;
return node.child(index);
public int getIndexOfChild(Object parent, Object child)
AdapterNode node = (AdapterNode) parent;
return node.index((AdapterNode) child);
public void valueForPathChanged(TreePath path, Object newValue)
private Vector listenerList = new Vector();
public void addTreeModelListener(TreeModelListener listener)
if ( listener != null
&& ! listenerList.contains( listener ) )
listenerList.addElement( listener );
public void removeTreeModelListener(TreeModelListener listener)
if ( listener != null )
listenerList.removeElement( listener );
public void fireTreeNodesChanged( TreeModelEvent e )
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() )
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeNodesChanged( e );
public void fireTreeNodesInserted( TreeModelEvent e )
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() )
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeNodesInserted( e );
public void fireTreeNodesRemoved( TreeModelEvent e )
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() )
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeNodesRemoved( e );
public void fireTreeStructureChanged( TreeModelEvent e )
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() )
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeStructureChanged( e );I actually had to do this a few months ago. There are ways to perform this kind display using various distributed object (i.e., using MS Word OLE objects to "interpret" the byte for you, etc.). But this soon got extremely difficult to manage (and I actually had to use Perl/CGI for the majority of it).
The solution I went with was to implement a "cache" directory on the web server. Basically, the JSP/Servlet can simply check the cache and if file not there, create it from the database. Then send a redirect back to the browser to this newly-created file. The browser will then appropriately open the document. I tested this with both Netscape and IE browsers and common MIME types such as text files, MS Office docs, zip files, PDFs, RTFs.
Not ideal, but unfortunately the best I came up with. -
How to get the path when i select a directory or a file in a JTree
How to get the path when i select a directory or a file in a JTree
import java.lang.*;
import java.io.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.HeadlessException;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Iterator;
* @author Frederic FOURGEOT
* @version 1.0
public class JTreeFolder extends JPanel {
protected DefaultMutableTreeNode racine;
JTree tree;
protected JScrollPane scrollpane;
final static int MAX_LEVEL = 1; // niveau max de descente "direct" dans l'arborescence
* Sous-classe FSNode
* @author Frederic FOURGEOT
* @version 1.0
private class FSNode extends DefaultMutableTreeNode {
File file; // contient le fichier li� au noeud
* Constructeur non visible
private FSNode() {
super();
* Constructeur par initialisation
* @param userObject Object
FSNode(Object userObject) {
super(userObject);
* Constructeur par initialisation
* @param userObject Object
* @param newFile File
FSNode(Object userObject, File newFile) {
super(userObject);
file = newFile;
* Definit le fichier lie au noeud
* @param newFile File
public void setFile(File newFile) {
file = newFile;
* Renvoi le fichier lie au noeud
* @return File
public File getFile() {
return file;
public JTree getJTree(){
return tree ;
* Constructeur
* @throws HeadlessException
public JTreeFolder() throws HeadlessException {
File[] drive;
tree = new JTree();
// cr�ation du noeud sup�rieur
racine = new DefaultMutableTreeNode("Poste de travail");
// cr�ation d'un noeud pour chaque lecteur
drive = File.listRoots();
for (int i = 0 ; i < drive.length ; i++) {
FSNode node = new FSNode(drive, drive[i]);
addFolder(drive[i], node); // on descend dans l'arborescence du lecteur jusqu'� MAX_LEVEL
racine.add(node);
// Gestion d'evenement sur JTree (on �coute les evenements TreeExpansion)
tree.addTreeExpansionListener(new TreeExpansionListener() {
public void treeExpanded(TreeExpansionEvent e) {
// lorsqu'un noeud est ouvert
// on descend dans l'arborescence du noeud jusqu'� MAX_LEVEL
TreePath path = e.getPath();
FSNode node = (FSNode)path.getLastPathComponent();
addFolder(node);
((DefaultTreeModel)tree.getModel()).reload(node); // on recharche uniquement le noeud
public void treeCollapsed(TreeExpansionEvent e) {
// lorsqu'un noeud est referm�
//RIEN
// alimentation du JTree
DefaultTreeModel model = new DefaultTreeModel(racine);
tree.setModel(model);
setLayout(null);
// ajout du JTree au formulaire
tree.setBounds(0, 0, 240, 290);
scrollpane = new JScrollPane(tree);
add(scrollpane);
scrollpane.setBounds(0, 0, 240, 290);
* Recuperation des sous-elements d'un repertoire
* @param driveOrDir
* @param node
public void addFolder(File driveOrDir, DefaultMutableTreeNode node) {
setCursor(new Cursor(3)); // WAIT_CURSOR est DEPRECATED
addFolder(driveOrDir, node, 0);
setCursor(new Cursor(0)); // DEFAULT_CURSOR est DEPRECATED
* Recuperation des sous-elements d'un repertoire
* (avec niveau pour r�cursivit� et arr�t sur MAX_LEVEL)
* @param driveOrDir File
* @param node DefaultMutableTreeNode
* @param level int
private void addFolder(File driveOrDir, DefaultMutableTreeNode node, int level) {
File[] fileList;
fileList = driveOrDir.listFiles();
if (fileList != null) {
sortFiles(fileList); // on tri les elements
// on ne cherche pas plus loin que le niveau maximal d�finit
if (level > MAX_LEVEL - 1) {return;}
// pour chaque �l�ment
try {
for (int i = 0; i < fileList.length; i++) {
// en fonction du type d'�l�ment
if (fileList[i].isDirectory()) {
// si c'est un r�pertoire on cr�� un nouveau noeud
FSNode dir = new FSNode(fileList[i].getName(), fileList[i]);
node.add(dir);
// on recherche les �l�ments (r�cursivit�)
addFolder(fileList[i], dir, ++level);
if (fileList[i].isFile()) {
// si c'est un fichier on ajoute l'�l�ment au noeud
node.add(new FSNode(fileList[i].getName(), fileList[i]));
catch (NullPointerException e) {
// rien
* Recuperation des sous-elements d'un noeud
* @param node
public void addFolder(FSNode node) {
setCursor(new Cursor(3)); // WAIT_CURSOR est DEPRECATED
for (int i = 0 ; i < node.getChildCount() ; i++) {
addFolder(((FSNode)node.getChildAt(i)).getFile(), (FSNode)node.getChildAt(i));
setCursor(new Cursor(0)); // DEFAULT_CURSOR est DEPRECATED
* Tri une liste de fichier
* @param listFile
public void sortFiles(File[] listFile) {
triRapide(listFile, 0, listFile.length - 1);
* QuickSort : Partition
* @param listFile
* @param deb
* @param fin
* @return
private int partition(File[] listFile, int deb, int fin) {
int compt = deb;
File pivot = listFile[deb];
int i = deb - 1;
int j = fin + 1;
while (true) {
do {
j--;
} while (listFile[j].getName().compareToIgnoreCase(pivot.getName()) > 0);
do {
i++;
} while (listFile[i].getName().compareToIgnoreCase(pivot.getName()) < 0);
if (i < j) {
echanger(listFile, i, j);
} else {
return j;
* Tri rapide : quick sort
* @param listFile
* @param deb
* @param fin
private void triRapide(File[] listFile, int deb, int fin) {
if (deb < fin) {
int positionPivot = partition(listFile, deb, fin);
triRapide(listFile, deb, positionPivot);
triRapide(listFile, positionPivot + 1, fin);
* QuickSort : echanger
* @param listFile
* @param posa
* @param posb
private void echanger(File[] listFile, int posa, int posb) {
File tmpFile = listFile[posa];
listFile[posa] = listFile[posb];
listFile[posb] = tmpFile; -
Hey, here is the scenario...a Jtree is in JScrollPane.. i can set tree background by calling myTree.setBackground(), and I can set the text color of tree node by creating my own JTreeCellRenderer to override the getTreeCellRender() .. but there is always a shadow around the tree bnode. I tried JComponent)mytree.getTreeCellRender().setOpaque(false) , then set treeCellRender.background..but it doesnot work.. any insight?
sorry about my Typo. Tree bnode = Tree Node. Every node (including root ) has an urgly shadow!!
-
Icon was changed to default icon when editting a node on JTree
I have a tree with icon on nodes. However, when I edit the node, the icon is changed to default icon.
I don't known how to write the treeCellEditor to fix that one.
The following is my code:
package description.ui;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.ToolTipManager;
import javax.swing.WindowConstants;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
public class Tree extends javax.swing.JPanel {
private JTree tree;
private JScrollPane jScrollPane1;
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.getContentPane().add(new Tree());
frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
frame.pack();
frame.show();
public Tree() {
super();
initGUI();
private void initGUI() {
try {
BorderLayout thisLayout = new BorderLayout();
this.setLayout(thisLayout);
setPreferredSize(new Dimension(400, 300));
jScrollPane1 = new JScrollPane();
this.add(jScrollPane1, BorderLayout.CENTER);
DefaultMutableTreeNode rootNode = createNode();
tree = new JTree(rootNode);
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
jScrollPane1.setViewportView(tree);
ToolTipManager.sharedInstance().registerComponent(tree);
MyCellRenderer cellRenderer = new MyCellRenderer();
tree.setCellRenderer(cellRenderer);
tree.setEditable(true);
tree.setCellEditor(new DefaultTreeCellEditor(tree, cellRenderer));
//tree.setCellEditor(new MyCellEditor(tree, cellRenderer));
} catch (Exception e) {
e.printStackTrace();
private void btRemoveActionPerformed(ActionEvent evt) {
TreePath path = tree.getSelectionPath();
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)path.getLastPathComponent();
((DefaultTreeModel)tree.getModel()).removeNodeFromParent(selectedNode);
private DefaultMutableTreeNode createNode() {
DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Doc");
DefaultMutableTreeNode ch1 = createChuongNode(rootNode, "Ch1");
DefaultMutableTreeNode ch2 = createChuongNode(rootNode, "Ch2");
createTextLeafNode(ch1, "title");
return rootNode;
private DefaultMutableTreeNode createChuongNode(DefaultMutableTreeNode parent, String name) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(new ChapterNodeData(name));
parent.add(node);
return node;
private DefaultMutableTreeNode createTextLeafNode(DefaultMutableTreeNode parent, String name) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(new TitleNodeData(name));
parent.add(node);
return node;
private class MyCellRenderer extends DefaultTreeCellRenderer {
ImageIcon titleIcon;
ImageIcon chapterIcon;
public MyCellRenderer() {
titleIcon = new ImageIcon(getClass().getClassLoader()
.getResource("description/ui/icons/Text16.gif"));
chapterIcon = new ImageIcon(getClass().getClassLoader()
.getResource("description/ui/icons/Element16.gif"));
public Component getTreeCellRendererComponent(
JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(
tree, value, sel,
expanded, leaf, row,
hasFocus);
if (isChapterNode(value)) {
setIcon(chapterIcon);
setToolTipText("chapter");
} else if (isTextLeafNode(value)) {
setIcon(titleIcon);
setToolTipText("title");
return this;
protected boolean isChapterNode(Object node) {
return ((DefaultMutableTreeNode)node).getUserObject() instanceof ChapterNodeData;
protected boolean isTextLeafNode(Object node) {
return ((DefaultMutableTreeNode)node).getUserObject() instanceof TitleNodeData;
private class MyCellEditor extends DefaultTreeCellEditor {
ImageIcon titleIcon;
ImageIcon chapterIcon;
public MyCellEditor(JTree tree, DefaultTreeCellRenderer renderer) {
super(tree, renderer);
titleIcon = new ImageIcon(getClass().getClassLoader()
.getResource("description/ui/icons/Text16.gif"));
titleIcon = new ImageIcon(getClass().getClassLoader()
.getResource("description/ui/icons/Element16.gif"));
public Component getTreeCellEditorComponent(
JTree tree,
Object value,
boolean isSelected,
boolean expanded,
boolean leaf,
int row) {
super.getTreeCellEditorComponent(tree, value, isSelected, expanded, leaf, row);
return this.editingComponent;
abstract class NodeData{
String name;
public NodeData(String name) {
this.name = name;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public String toString() {
return name;
class ChapterNodeData extends NodeData {
public ChapterNodeData(String s) {
super(s);
class TitleNodeData extends NodeData {
public TitleNodeData(String attr) {
super(attr);
}Arungeeth wrote:
I know the name of the node... but i cant able to find that nodeHere is some sample code for searching and selecting a node:
TreeModel model = jtemp.getModel();
if (model != null) {
Object root = model.getRoot();
search(model, root, "Peter");//search for the name 'Peter'
System.out.println(jtemp.getSelectionPath().getLastPathComponent());
} else {
System.out.println("Tree is empty.");
private void search(TreeModel model, Object o, String argSearch) {
int cc;
cc = model.getChildCount(o);
for (int i = 0; i < cc; i++) {
DefaultMutableTreeNode child = (DefaultMutableTreeNode) model.getChild(o, i);
if (model.isLeaf(child)) {
TreeNode[] ar = child.getPath();
String currentValue = Arrays.toString(ar);
if (currentValue.contains(argSearch)) {
jtemp.setSelectionPath(new TreePath(ar));
} else {
search(model, child, argSearch);
} -
Hi, i'm creating a JTree with TreeModel, and make the root as my c: drive. when the tree displayed, i found that it display some files that are actually not available in my c: drive. so, can anyone please tell me what's wrong in this case? thanks in advance!
OK, these are two java files, please check for me. Thanks!
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
public class MyTree extends JFrame implements ActionListener{
File[] rt;
File drive;
private DefaultComboBoxModel comboModel;
MyTreeModel model;
File root = null;
JTree tree;
public MyTree() {
initComponents();
public void initComponents() {
setLayout(new BorderLayout());
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
panelB = new javax.swing.JPanel();
panelB.setLayout(new BorderLayout());
comboModel = new DefaultComboBoxModel();
selectDrive = new JComboBox(comboModel);
rt=File.listRoots();
for (int i=0; i<rt.length; i++)
drive = rt;
comboModel.addElement(drive);
selectDrive.setModel(comboModel);
selectDrive.addActionListener(this);
selectDrive.setActionCommand("sel_drive");
tree = new JTree();
tscrollPane = new JScrollPane(tree);
displayTree();
panelB.add(selectDrive,BorderLayout.NORTH);
panelB.add(tscrollPane,BorderLayout.CENTER);
add(panelB,BorderLayout.NORTH);
pack();
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
if(cmd.equals("sel_drive")){
displayTree();
public void displayTree(){
Object obj = comboModel.getSelectedItem();
String str = obj.toString();
File f = new File(str);
model = new MyTreeModel(f);
tree.setModel(model);
public static void main(String args[]){
MyTree treefr = new MyTree();
treefr.setSize(500, 500);
treefr.setVisible(true);
public JComboBox selectDrive;
public JPanel panelB;
public JScrollPane tscrollPane;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.io.*;
class MyTreeModel implements TreeModel {
public File root;
public MyTreeModel(File rt) {
root = rt;
public Object getRoot() {
return root;
public boolean isLeaf(Object node) {
File leaf = (File)node;
return leaf.isFile();
public int getChildCount(Object parent) {
File p = (File)parent;
if(p.isDirectory()){
System.out.println("Total Files="+p.list().length);
return p.list().length;
}else{
return 0;
public Object getChild(Object parent, int index) {
File p = (File)parent;
String[] children = p.list();
File child = new File(p,children[index]);
try
return child;
catch (ArrayIndexOutOfBoundsException e)
e.printStackTrace();
return null;
public int getIndexOfChild(Object parent, Object child) {
String cname;
String[] children = ((File)parent).list();
if (children.length>0){
cname = ((File)child).getName();
for(int i = 0; i < children.length; i++) {
if (cname.equals(children[i]))
return i;
else{
return -1;
return -1;
public void valueForPathChanged(TreePath path, Object newvalue) {}
public void addTreeModelListener(TreeModelListener l) {}
public void removeTreeModelListener(TreeModelListener l) {}
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