JTree selection problem
I have a problem trying to select a node of a JTree using JDK 1.3.1 and JDK 1.4 beta 3. I use a JTree with a DefaultTreeModel and DefaultMutableTreeNodes.
Before the tree became visible it has all the nodes loaded but not visible. Then I want to select a path of the tree using a node (DefaultMutableTreeNode) but I not able to do it.
The path isn't selected and isn't visible.
I use the following code:
jTree.setExpandsSelectedPaths(true)
jTree.setSelectionPath(new TreePath(node.getPath()));
//I've also tried with
jTree.expandPath(new TreePath(dmtn.getPath()));Thanks.
Fair enough. I guess I need to do a bit more reading.
You have to create a new TreePath object because the
getPath() method of DefaultMutableTreeNode returns an
array of TreeNodes where as the setSelected method of
JTree requires a TreePath object.
Why are you creating a new path with the contents ofa
call to getPath?
wouldn't node.getPath() be what you want toexpend/set
visible/scroll to etc
try it without creating a new TreePath
Similar Messages
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JTree selection problem when using custom renderer and editor
Hello:
I created a JTree with custom renderer and editor.
The customization makes JCheckBox to be the component
responsible for editing and rendering.
The problem is that when I click on the node with the checkbox
the JTree selection model does not get updated.
Without customizations of the editor and renderer the MouseEvent would be fired and BasicTreeUI$MouseHandler.mousePressed() method would call
the selectPathForEvent() method which would be responsible for updating
the selection model. At the same time if I attach a mouse listener to the JTree (customized) I see the events when clicking on the nodes. It seems like the MouseEvent gets lost and somehow as a result of which the selection model does not get updated.
Am I missing something?
Thanks
AlexanderYou probably forgot to call super.getTreeCellRendererComponent(...) at the beginning of your getTreeCellRendererComponent(...) method in your custom renderer.
Or maybe in the getTreeCellEditorComponent(...) of the TreeCellEditor... -
JTree Selection problem. Plz help...
Hi All,
I hv designed a JTree with DefaultMutableTreeNode. And i hv added TreeSelectionListener to it. When i select the nodes of the tree i hv to display the RootNode name of the tree in a label. I'm able to achieve it using
DefaultMutableTreeNode node =(DefaultMutableTreeNode) mBalanceInfoTree.getLastSelectedPathComponent();
TextField.setText(node.getParent());
the problem is when i click on the RootNode it is displaying as "RootNode" but not the node name.
Can anyone help me on this.
Thanks in advance
ssHi Frank,
Atlast i made it to work.
TreePath tp = mBalanceInfoTree.getSelectionPath();
StringTokenizer st = new StringTokenizer(tp.toString(), ",");
String bal_Grp[] = new String[st.countTokens()];
int count = 0;
while (st.hasMoreElements()) {
bal_Grp[count] = st.nextToken();
count++;
Thanks for your replies..
N correct me if there is any wrong in this approach.
Cheers
SS -
Jtree selection problem.....help
hi,
I have a desktoppane....inside i m opening some internal frame.....
also i have a tree class....which has any leaf name as internal frame title
my question is ...when i selected any internal frame it should show selected leaf according to the internal frame activate title.....
like we have in VB...when we select any form ...it select corresponding leaf also..
i wanna do same...
i using code alike this
public void internalFrameActivated(InternalFrameEvent e)
DefaultMutableTreeNode dmt=new DefaultMutableTreeNode(getTitle());
TreePath pp=new TreePath(dmt.getPath());
tree.expandPath(pp);
tree.setSelectionPath(pp);
tree.fireTreeExpanded(pp);*/
but it's not showing selected leaf...even though it's getting correct path
regards
TariqueHi Frank,
Atlast i made it to work.
TreePath tp = mBalanceInfoTree.getSelectionPath();
StringTokenizer st = new StringTokenizer(tp.toString(), ",");
String bal_Grp[] = new String[st.countTokens()];
int count = 0;
while (st.hasMoreElements()) {
bal_Grp[count] = st.nextToken();
count++;
Thanks for your replies..
N correct me if there is any wrong in this approach.
Cheers
SS -
Hello,
i have a selection problem with JTable. I want to allow only single cell selection and additionally limit the selection to the first column.
I preffered the style from MS Outlook Express where you can select the email accounts to edit.
It is a table like this:
Account name | Type | ...
--------------|---------|---------------------
Hotmail | POP3 |
GMX | IMAP |The selection should be only avaibable at 'Hotmail' or 'GMX' - not at 'POP3', 'IMAP' or as complete row selection.
Please help me!
Thanks.
WarlockMaybe this will helpimport java.awt.*;
import javax.swing.*;
public class Test3 extends JFrame {
public Test3() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = getContentPane();
String[] head = {"One", "Two"};
String[][] data = {{"R1-C1", "R1-C2"}, {"R2-C1", "R2-C2"}};
JTable jt = new JTable(data, head);
jt.getColumnModel().setSelectionModel(new MyTableSelectionModel());
content.add(new JScrollPane(jt), BorderLayout.CENTER);
jt.setCellSelectionEnabled(true);
jt.setRowSelectionAllowed(false);
jt.setColumnSelectionAllowed(false);
setSize(300, 300);
setVisible(true);
public static void main(String[] arghs) { new Test3(); }
class MyTableSelectionModel extends DefaultListSelectionModel {
public void setSelectionInterval(int index0, int index1) {
super.setSelectionInterval(0, 0);
} -
Select Problem For 'Back Menus' - Zen V P
Just got the Zen V Plus and tried to set the time/date. Followed the 'guide' and after the time/date screen pressed the 'back button'. Got the Set Alarm/Date/Time (etc) menu but when I selected an option (moved joystick down to desired option then pressed the joystick) the time/date display came up and I was NOT ABLE to set the date. Same thing occurred trying to set the date (tried it several times and it worked once .... then attempted again - several times (4) but it only worked once). Turns out I have the same problem with any option in ANY 'back' menu. Suggestion?
Do I have a defecti've unit (can't be the 'operator' who is defecti've! haha)? Should I return it and try another?
Actually not that interested in playing music .... it's more for playing .wma(DRM) book files.Latest ... updated my firmware (to ZENVPlus_PCFW_P4S_L2___0.exe) and it fixed the select problem for SET DATE/TIME etc however
the SELECT procedure doesn't always work for 'back button' menus. Example: tried to set a bookmark... following procedure in 'guide', pressed 'back button' and held it, from 'NOW PLAYING' screen - works 2 out of 5 times. Most of the time, pressing and holding takes you back to the previous menu - not to the 'back' (or in this case the SET BOOKMARK) menu. Sounds like something for the next version of firmware ... the code doesn't always set an internal timer correctly (am a programmer of 30 years ... part of that time pgmmng firmware). -
when i select a page to be print from my pc the page select in
Hello. I feel your pain and frustration with the print selection problem in safari, especially in Snow Leopard. I have spent hours trawling help pages and forums etc. BUT YEE HAA (sorry got a bit excited, but it really was hours) I found the answer. So here goes.
Click on Safari
Scroll down to services then slide to right
Scroll down to services preferences and click
Scroll down to the Text section
If you Tick the Text box it will choose all options for you. Or if you don't want all options in the Text list, then untick Text box and tick options you do want.
BUT for your print selection problem make sure you tick NEW TEXT EDIT WINDOW CONTAINING SELECTION.
Then when you want to select something in a web page you want to print (including pictures etc) then highlight it, then Right click. And low and behold, in the list is NEW TEXT EDIT WINDOW CONTAINING SELECTION. Click that, Then press cmd+p and your printing.
I really hope that helps with your problem
I can now go to sleep. -
hi,
iam stuck up with AT LINE-SELECTION problem ie i designed a screen where they need month list on clicking F4. i got the month list using month_names_get in the screen but while clicking the relevant month no.it's not entering into the required parameter. i have attached the codings,
MODULE MONTH_DIS OUTPUT.
SUPPRESS DIALOG.
LEAVE TO LIST-PROCESSING AND RETURN TO SCREEN 0.
SET PF-STATUS SPACE.
NEW-PAGE NO-TITLE.
WRITE:/ 'SELECT MONTH' COLOR COL_HEADING.
ULINE.
DATA: T_MNTH LIKE T247 OCCURS 12 WITH HEADER LINE.
refresh t_mnth.
CALL FUNCTION 'MONTH_NAMES_GET'
EXPORTING
LANGUAGE = SY-LANGU
IMPORTING
RETURN_CODE =
TABLES
MONTH_NAMES = T_MNTH
EXCEPTIONS
MONTH_NAMES_NOT_FOUND = 1
OTHERS = 2
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
loop at t_mnth.
write:/ t_mnth-mnr, t_mnth-ltx.
endloop.
CLEAR T_MNTH-MNR.
ENDMODULE. " MONTH_DIS OUTPUT
AT LINE-SELECTION.
p_period = t_mnth-mnr.
CHECK NOT p_period IS INITIAL.
LEAVE TO SCREEN 0.
here in the AT LINE-SELECTION, the selected month is not coming to the required parameter.
pls help me in this issue,
Thanks in advance,
Premnath.You need to set a "Hide" after the write... I suggest you also set your own dialog PF-STATUS too so you can have just a PF2 "pick" button and a Cancel button ( this will look better to the user).
loop at t_mnth.
write:/ t_mnth-mnr, t_mnth-ltx.
hide: t_mnth. "needs this
endloop.
clear: t_mnth. -
Weird BGP path selection problem
Hi, all,
I am seeing a weird BGP path selection problem on 4948 switch running cat4500-entservicesk9-mz.122-46.SG.bin code, this switch has two uplinks to the same ISP's different edge router, one circuit is primary the other one is strict backup, only default route is accepted from ISP. I am setting both local preference and weight to the default route advertised over backup link, however neither one is taking effect, BGP still thinks the backup link is better, what could be wrong?
rtr#sh ip bgp 0.0.0.0/0
BGP routing table entry for 0.0.0.0/0, version 105
Paths: (3 available, best #2, table Default-IP-Routing-Table, not advertised to EBGP peer)
Not advertised to any peer
17675, (received & used)
203.169.8.37 from 203.169.8.37 (61.211.160.150)
Origin IGP, localpref 100, valid, external
Community: 65001:0 no-export
17675
203.169.8.45 from 203.169.8.45 (61.211.160.151)
Origin IGP, localpref 90, weight 90, valid, external, best <====
Community: 65001:0 no-export
17675, (received-only)
203.169.8.45 from 203.169.8.45 (61.211.160.151)
Origin IGP, localpref 100, valid, external
Community: 65001:0 no-export
ThanksHi,
On cisco routers , weight is having highest preference to decide best path. By default for received route, weight is 0 but you are setting weight 90 to backup path and that is why it is getting preferred (higher is better). Please remove weight and let local preference be 90 (lesser than route on primary path)
--Pls dont forget to rate helpful posts--
Regards,
Akash -
Certificate selection problem in Safari
Hi ,
I have certifcates A,B,C,D for the same site , whenever i use the Mozilla it is asking which one to select , but somehow i dont know why Safari is asking the same option.
It is forcing me to accept Certifcate A to that paricular site. How to solve this problem in safari.
Regards
VikranthHello. I feel your pain and frustration with the print selection problem in safari, especially in Snow Leopard. I have spent hours trawling help pages and forums etc. BUT YEE HAA (sorry got a bit excited, but it really was hours) I found the answer. So here goes.
Click on Safari
Scroll down to services then slide to right
Scroll down to services preferences and click
Scroll down to the Text section
If you Tick the Text box it will choose all options for you. Or if you don't want all options in the Text list, then untick Text box and tick options you do want.
BUT for your print selection problem make sure you tick NEW TEXT EDIT WINDOW CONTAINING SELECTION.
Then when you want to select something in a web page you want to print (including pictures etc) then highlight it, then Right click. And low and behold, in the list is NEW TEXT EDIT WINDOW CONTAINING SELECTION. Click that, Then press cmd+p and your printing.
I really hope that helps with your problem
I can now go to sleep. -
Hi all,
I've got a JTree that represents a sort of data that I'm going to change dynamically in my application. I'd like to reset the selection of the user to the leaf she has selected before the change to the tree structure.
First of all my tree uses DefaultMutableTreeNode to build each node, and each DefaultMutableTreeNode contains a SingleKeyValue object, that is a key-value object (two strings) and that has an hashcode defined as follows:
public class SingleKeyValue extends BaseKeyValue{
* The key of the database object.
protected String key = null;
* The description of this object.
protected String value = null;
public int hashCode() {
return this.key.hashCode();
I hope the hashcode can help me finding the right object even when its value changes (but the key is the same). The construction of the tree is the following:
DefaultMutableTreeNode root = new DefaultMutableTreeNode("The root");
// iterate and build each node
SingleKeyValue object = new SingleKeyValue("key","value");
DefaultMutableTreeNode node = new DefaultMutableTreeNode(object);
root.add(node);
DefaultTreeModel model = new DefaultTreeModel(root);
JTree tree = new JTree(model);
so the tree is associated to a DefaultTreeModel. Then, when I need to change something in the tree I rebuild the tree and all leafs (with the SingleKeyValues) and rebuild the model:
TreeModel treeModel = this.myTree.getModel();
TreeSelectionModel selectionModel = this.myTree.getSelectionModel();
DefaultTreeModel defaultTreeModel = null;
DefaultTreeSelectionModel defaultTreeSelectionModel = null;
TreePath selectedPath = null;
TreeNode root = null;
Logger.info("SimpleTreePanel.refreshDatabaseView: treemodel "+treeModel + " selectionModel " + selectionModel);
if( treeModel != null && treeModel instanceof DefaultTreeModel ) {
defaultTreeModel = (DefaultTreeModel) treeModel;
root = this.getRoot();
// get the selection
if( selectionModel != null && selectionModel instanceof DefaultTreeSelectionModel ){
defaultTreeSelectionModel = (DefaultTreeSelectionModel) selectionModel;
selectedPath = defaultTreeSelectionModel.getSelectionPath();
Logger.warn("Selection path of the tree: "+selectedPath);
// rebuild the tree
defaultTreeModel.setRoot(root);
// set the selected element
defaultTreeSelectionModel.setSelectionPath(selectedPath);The problem is that after the above code the tree is all closed, no leaf are selected. I guess the problem is with the SingleKeyValueObject because I've tried the default model and it works with, for example, simple strings. Any idea about?
Thanks,
LucaHere's a complete test program that creates a few SingleKeyValue objetcs (objects with a key and a description) and that then places them into a JTree using the DefaultMutableTreeNode. After that, the selection of user is took and one node is changed, but while the selection is working, the reload/refresh of the tree is not.
Any idea about how to work on it?
public class SingleKeyValue extends BaseKeyValue{
* The key of the database object.
protected String key = null;
* The description of this object.
protected String value = null;
// constants related to the type of the table this object refers to
public static final String COMPETENCE = "competenza";
public static final String FAMILY = "famiglia_competenza";
public static final String ROLE = "ruolo";
public static final String PROVINCE = "provincia";
public static final String KNOWLEDGE = "titolo_studio";
public final static String OBJECTIVE = "obiettivo";
public final static String PERSON = "persona";
public SingleKeyValue( String key, String value, String table){
super();
this.key = key;
this.value = value;
this.SQLTable = table;
* @return the key
public final String getKey() {
return key;
* @param key the key to set
public final void setKey(String key) {
this.key = key;
* @return the value
public final String getValue() {
return value;
* @param value the value to set
public final void setValue(String value) {
this.value = value;
* Shows this element.
public String toString(){
String ret;
if( this.showKey ){
ret = this.label + this.key +" { "+ this.value +" }";
else
ret = this.label + this.value;
// trim the string
if( ret.length() > this.maxLength )
return ret.substring(0 , this.maxLength);
else
return ret;
* The hash code of this object is the hash code of the key.
* @return the hash code of the key of the object
public int hashCode() {
return this.key.hashCode();
* Returns true if the object passed is a single key value equals (i.e., with the same key) of this one.
public boolean equals(Object o){
if( o== null || (! (o instanceof SingleKeyValue) ) ) return false;
else
return (this.hashCode() == o.hashCode());
public static void main(String argv[]) throws Exception{
SingleKeyValue skv1 = new SingleKeyValue("Key1","Description1", SingleKeyValue.COMPETENCE);
SingleKeyValue skv2 = new SingleKeyValue("Key1a","Description1a", SingleKeyValue.COMPETENCE);
SingleKeyValue skv3 = new SingleKeyValue("Key1b","Description1b", SingleKeyValue.COMPETENCE);
SingleKeyValue skv4 = new SingleKeyValue("Key2","Description2", SingleKeyValue.COMPETENCE);
SingleKeyValue skv5 = new SingleKeyValue("Key2a","Description2a", SingleKeyValue.COMPETENCE);
SingleKeyValue skv6 = new SingleKeyValue("Key2b","Description2b", SingleKeyValue.COMPETENCE);
DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("root");
DefaultMutableTreeNode node1 = new DefaultMutableTreeNode(skv1);
DefaultMutableTreeNode node2 = new DefaultMutableTreeNode(skv2);
DefaultMutableTreeNode node3 = new DefaultMutableTreeNode(skv3);
DefaultMutableTreeNode node4 = new DefaultMutableTreeNode(skv4);
DefaultMutableTreeNode node5 = new DefaultMutableTreeNode(skv5);
DefaultMutableTreeNode node6 = new DefaultMutableTreeNode(skv6);
rootNode.add(node1);
node1.add(node2);
node1.add(node3);
rootNode.add(node4);
node4.add(node5);
node4.add(node6);
JTree tree = new JTree(rootNode);
JFrame f = new JFrame("Tree try");
f.add( new JScrollPane(tree) );
f.setSize(300,300);
f.setVisible(true);
System.out.println("Please select a node within 10 seconds");
Thread.sleep(10000);
// now get the user selection
TreeModel treeModel = tree.getModel();
TreeSelectionModel selectionModel = tree.getSelectionModel();
DefaultTreeModel defaultTreeModel = null;
DefaultTreeSelectionModel defaultTreeSelectionModel = null;
TreePath selectedPath = null;
TreeNode root = null;
if( treeModel != null && treeModel instanceof DefaultTreeModel ) {
defaultTreeModel = (DefaultTreeModel) treeModel;
// get the selection
if( selectionModel != null && selectionModel instanceof DefaultTreeSelectionModel ){
defaultTreeSelectionModel = (DefaultTreeSelectionModel) selectionModel;
selectedPath = defaultTreeSelectionModel.getSelectionPath();
// rebuild the tree
node1.setUserObject(new SingleKeyValue("key20","key changed",SingleKeyValue.FAMILY));
defaultTreeModel.reload();
// set the selected element
defaultTreeSelectionModel.setSelectionPath(selectedPath);
} -
JTree multiple nodes selection problem !
I can not make my JTree to be in multiple node selection mode.
I have custom tree model and tree node class, the tree model class
implements javax.swing.tree.TreeModel, and the tree node is an ordinary
Java object.
In this setting, my JTree is always in single selection mode.
I have tried set the selection model after the JTree has initialized, and
it didn't work.
What I missed in TreeModel implementation ? Or should my tree node class
also implements javax.swing.tree.TreeNode ?
Don't tell me just call
xxtree.getSelectionModel().setSelectionMode(javax.swing.tree.TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
It didn't work.Just in case anyone wants to know, I did find the magic number of files, and what the problem is. I talked with tech suppot at Adobe, and they know the problem exists, but won't fix it. I did put in a request in the "Request a Feature" form. Read on:
The magic number is 40 Canon 1Ds Mark III Raw files, and clicking on three or more keywords. The key to not having the numbers of keywords counted incorrectly in the filter pane is to click on the keywords as fast as you can before it starts to write to the metadata. If you click on each keyword one at a time, and wait about a second or more between selecting the keywords, then the counts in the filter panel for the number of keywords is not correct in relation to the number of files that you have chosen to apply keywords to. The cure for this is to click as many keywords as possible as fast as you can before the software starts incorporating the keywords into the metadata.
I would suggest to Adobe, that a nice feature would be that one could click on as many keywords as one would want, to as many files one would want, and then have a button or icon that would enable one to then apply all the keywords at once, instead of applying them as you click them as it is now. I also would love it if Adobe fixed it now instead of waiting to fix it in the version of CS5. Someone on Adobe's support line told me that Adobe would rather wait to put this into the CS5 version than fix it now. I don't think that is right, but heck, I am only one guy who depends on this software to provide images keyworded to my clients in a timely manner. I would never run my business like this Adobe. If there is a problem, and there is, please fix it now, or give me some of my money back since your product has a design flaw that is having a negative impact in my ability to to my job and run my business.
Thanks!
Daniel Root
Portland, OR -
Jtree Select node and change leafs icon problem
Hi All,
i create a tree and implement a TreeSelectionListener:
my mission is whenever i select a node i need to change the icon of this node (for now.later i will have to find if it have childrens).
import java.awt.Color;
import java.awt.Component;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import java.util.Vector;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class TreeView{
DefaultMutableTreeNode top;
JTree tree ;
Color frameColor;
public static ImageIcon NoTSelIcon;
public static ImageIcon SelIcon;
public static String[] name= new String[8];
public TreeView(Color BackColor) {
// TODO Auto-generated constructor stub
top = new DefaultMutableTreeNode("Diagnostics");
this.frameColor=BackColor;
SelIcon = createImageIcon("../Resource/Images/Select.gif");
if (SelIcon == null)
System.err.println("Tutorial icon missing; using default.");
NoTSelIcon = createImageIcon("../Resource/Images/NotSelc.gif");
if (NoTSelIcon == null)
System.err.println("Tutorial icon missing; using default.");
public Component createTreeComponents(){
//Create the nodes.
createNodes(top);
//Create a tree that allows one selection at a time.
tree = new JTree(top);
//TREE LISTENERS
//Treeselction listener
Handler hObject = new Handler();
tree.addTreeSelectionListener(hObject);
//Tree expand/collapse listener
HandlerExpansionListener hObjectExpan = new HandlerExpansionListener();
tree.addTreeExpansionListener(hObjectExpan);
// tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
//set tree background
tree.setBackground(frameColor);
tree.setCellRenderer(new OverrideTreeCellRenderer(frameColor,SelIcon,NoTSelIcon));
return tree;
private void createNodes(DefaultMutableTreeNode top) {
DefaultMutableTreeNode category = null;
DefaultMutableTreeNode SubCategory = null;
DefaultMutableTreeNode SubCategoryBasee = null;
DefaultMutableTreeNode SubSubCategoryBasee = null;
category = new DefaultMutableTreeNode("Dfe");
top.add(category);
//Sub test visible
SubCategory = new DefaultMutableTreeNode("Test Visible");
category.add(SubCategory);
SubCategory.add(new DefaultMutableTreeNode("Son 1"));
SubCategory.add(new DefaultMutableTreeNode("Son 2"));
SubSubCategoryBasee = new DefaultMutableTreeNode("Test Base");
SubSubCategoryBasee.add(new DefaultMutableTreeNode("Grandson 1"));
SubSubCategoryBasee.add(new DefaultMutableTreeNode("Grandson 2"));
SubCategory.add(SubSubCategoryBasee);
class Handler implements TreeSelectionListener {
public void valueChanged(TreeSelectionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("treeSelect event ");
TreePath trph;
trph=arg0.getNewLeadSelectionPath();
int count=trph.getPathCount();
DefaultMutableTreeNode Selnode = (DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
String Name = (String)Selnode.getUserObject();
setSelected(Selnode,true);
int number_ofnodes=getNodeCountBelow((TreeModel)tree.getModel() , Selnode, false);
System.out.println("The Number of nodes under "+Name+"="+number_ofnodes);
tree.setCellRenderer(new IconRenderer(SelIcon,NoTSelIcon,frameColor));
class HandlerExpansionListener implements TreeExpansionListener {
public void valueChanged(TreeSelectionEvent arg0) {
// TODO Auto-generated method stub
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) return;
} // The inner class
public void treeCollapsed(TreeExpansionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("treeCollapsed event ");
public void treeExpanded(TreeExpansionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("treeExpanded event ");
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
//ImageIcon imcon= new ImageIcon(path);
//return imcon;
java.net.URL imgURL = TreeView.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
DefaultMutableTreeNode newnode;
public void setSelected(DefaultMutableTreeNode Selnode ,boolean isSelected)
Enumeration Enchilds=Selnode.children();//ENUMRATE ALL CHILDS FOR THIS NODE
if (Enchilds != null)
while (Enchilds.hasMoreElements())
newnode=(DefaultMutableTreeNode)Enchilds.nextElement();
String NameSel = (String)newnode.getUserObject();
setSelected(newnode,isSelected);
//GETTING THE TREE DEPTH
public int getNodeCountBelow(TreeModel model, Object node, boolean includeInitialNode)
int n = includeInitialNode ? 1 : 0;
for (int i = 0; i < model.getChildCount(node); i ++)
n += getNodeCountBelow(model, model.getChild(node, i), true);
return n;
import java.awt.Color;
import java.awt.Component;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
public class IconRenderer extends DefaultTreeCellRenderer {
private static final long serialVersionUID = 1L;
Icon SelectedIcon;
Icon NotSelectedIcon;
Color BackgroundColor;
boolean Selected=false;
boolean Leaf=false;
boolean IsItaChild=false;
DefaultMutableTreeNode SelctedNode=null;
public IconRenderer(Icon SelIcon,Icon NoTSelIcon,Color Bacground) {
SelectedIcon = SelIcon;
NotSelectedIcon = NoTSelIcon;
BackgroundColor=Bacground;
setBackgroundNonSelectionColor(BackgroundColor);
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);
Selected=sel;
Leaf=leaf;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
String s2 = (String)node.getUserObject();
return this;
}my problem is :
when i select a node the the method "getTreeCellRendererComponent"
start to run on the entire tree from buttom to top and than from top to buttom.
for me it waste of time because if has say 100 nodes it wont botthers me.
but i have 20000 nodes and more its take a time.
and for all this nodes i have to make compares.
is there a way to force the DefaultTreeCellRenderer to not run the entire tree???
ThanksYou need to make sure that your TreeModel interprets your group nodes to be non-leaf nodes (one of the methods in the TreeModel interface is called isLeaf). If you are using a DefaultTreeModel with DefaultMutableTreeNode objects, you can use the askAllowsChildren property of DefaultTreeModel and the allowsChildren property of DefaultMutableTreeNode to control this. See the API for more details:
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/tree/DefaultTreeModel.html
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/tree/DefaultMutableTreeNode.html -
Hi,
I am setting the selection mode for a JTree to be single selection. Suppose the node which I selected was in expanded state, after making the selection it is in collapsed state. Now suppose I want to resume the expanded state and again try to select the same node without making any intermediate selection the listener doesn't listen. But if I make make a different node selection in between the 2 consecutive selections made to the same node the 2nd selection is listened.
Is it something like if two similar selections are made one after the other the second one is discarded or not listened. If so how can I overcome this? If not please tell me where am I making the mistake.selection will be fired only when the selection property changed. so, collapsing and expanding should be done in mouse event handlers.
-
Please help me ..
i have write a code ..which is when the user clicks the button...
a jtree table will come and the values inside the jtree will be filled by the contents of the selected items in the form...
but my problem is jtree only is comming
i created the object class ... but ...
the initialisation is not happening...
plz check the code below .. this is my class
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
public class Reservation extends JFrame implements ItemListener,ActionListener{
JComboBox fromCity = null;
JComboBox toCity = null;
JComboBox dDay = null;
JComboBox dMonth = null;
JComboBox dYear = null;
JComboBox rDay = null;
JComboBox rMonth = null;
JComboBox rYear = null;
JComboBox adult = null;
JComboBox Cabin = null;
JFrame table;
public Reservation()
setSize(600,400);
JPanel p = new JPanel();
//getContentPane().setLayout(new BorderLayout());
GridBagLayout gbl = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
p.setLayout(gbl);
String []cities = {"New York","Chicago","Miami","Pittsburgh","Memphis","New Orleans"};
String [] days={"1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","27","28","29","30","31"};
String [] months = {"January","Feburary","March","April","May","June","July","August","September","October","November","December"};
String [] year = {"2006","2007"};
String [] adt = {"1","2","3","4"};
String [] cab = {"Buisness","Economy"};
fromCity = new JComboBox(cities);
fromCity.setSelectedIndex(0);
toCity = new JComboBox(cities);
toCity.setSelectedIndex(0);
dDay = new JComboBox(days);
dMonth = new JComboBox(months);
dYear = new JComboBox(year);
rDay = new JComboBox(days);
rMonth = new JComboBox(months);
rYear = new JComboBox(year);
adult = new JComboBox(adt);
Cabin = new JComboBox(cab);
JLabel frmCity = new JLabel("From");
frmCity.setLabelFor(fromCity);
JLabel tCity = new JLabel("To");
tCity.setLabelFor(tCity);
JLabel dDate = new JLabel("Departure Date");
dDate.setLabelFor(dDate);
JLabel rDate = new JLabel("Return Date");
rDate.setLabelFor(rDate);
JLabel Psg = new JLabel("Pasengers");
Psg.setLabelFor(Psg);
JLabel Adults = new JLabel("Adults");
Adults.setLabelFor(Adults);
JLabel cabin = new JLabel("Cabin");
cabin.setLabelFor(cabin);
JLabel search = new JLabel("Search By");
search.setLabelFor(search);
JRadioButton ROneWay = new JRadioButton("One Way");
JRadioButton RRoundTrip = new JRadioButton("Round Trip");
JButton searchbutton = new JButton("Date");
ButtonGroup group = new ButtonGroup();
group.add(ROneWay);
group.add(RRoundTrip);
gbc.gridx = 0;
gbc.gridy = 0;
gbc.insets = new Insets(0,30,0,0);
p.add(frmCity,gbc);
gbc.gridx =1;
gbc.gridy = 0;
gbc.insets = new Insets(0,30,0,0);
p.add(fromCity,gbc);
gbc.gridx =0;
gbc.gridy = 1;
gbc.insets = new Insets(0,30,0,0);
p.add(tCity,gbc);
gbc.gridx =1;
gbc.gridy = 1;
gbc.insets = new Insets(10,30,0,0);
p.add(toCity,gbc);
gbc.gridx = 0;
gbc.gridy = 2;
gbc.insets = new Insets(10,50,0,0);
p.add(ROneWay,gbc);
gbc.gridx = 1;
gbc.gridy = 2;
gbc.insets = new Insets(10,30,0,0);
p.add(RRoundTrip,gbc);
gbc.gridx = 1;
gbc.gridy = 3;
gbc.insets = new Insets(0,0,0,0);
p.add(dDate,gbc);
gbc.gridx = 0;
gbc.gridy = 4;
p.add(dDay,gbc);
gbc.gridx = 1;
gbc.gridy = 4;
p.add(dMonth,gbc);
gbc.gridx = 2;
gbc.gridy = 4;
p.add(dYear,gbc);
gbc.gridx = 1;
gbc.gridy = 5;
gbc.insets = new Insets(0,0,0,0);
p.add(rDate,gbc);
gbc.gridx = 0;
gbc.gridy = 6;
p.add(rDay,gbc);
gbc.gridx = 1;
gbc.gridy = 6;
p.add(rMonth,gbc);
gbc.gridx = 2;
gbc.gridy = 6;
p.add(rYear,gbc);
gbc.gridx = 1;
gbc.gridy = 7;
p.add(Psg,gbc);
gbc.gridx = 0;
gbc.gridy = 8;
p.add(Adults,gbc);
gbc.gridx = 1;
gbc.gridy = 8;
p.add(adult,gbc);
gbc.gridx = 0;
gbc.gridy = 9;
p.add(cabin,gbc);
gbc.gridx = 1;
gbc.gridy = 9;
gbc.insets = new Insets(10,0,0,0);
p.add(Cabin,gbc);
gbc.gridx = 0;
gbc.gridy = 10;
p.add(search,gbc);
gbc.gridx = 1;
gbc.gridy = 10;
gbc.insets = new Insets(10,0,0,0);
p.add(searchbutton,gbc);
getContentPane().add(p);
fromCity.addItemListener(this);
toCity.addItemListener(this);
dDay.addItemListener( this);
dMonth.addItemListener( this);
dYear.addItemListener(this);
adult.addItemListener(this);
Cabin.addItemListener(this);
searchbutton.addActionListener(this);
//Jtable form
table = new JFrame();
Container container;
container = table.getContentPane();
JPanel jpanel = new JPanel(new GridLayout(2,1));
container.setLayout(new GridLayout(2,1));
JLabel l1 = new JLabel("Departure Journey");
l1.setLabelFor(l1);
container.add(l1);
final String[] colHeads = {"","Flightno","Date","Departure Time","Arrival Time","Flight","Duration","Fare"};
final Object[ ][ ] data = new Object[10][10];
JTable table = new JTable(data,colHeads);
int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
JScrollPane jsp = new JScrollPane(table,v,h);
container.add(jsp,BorderLayout.CENTER);
String ffcity,ttcity,dday,dmon,dyear,adt,cab;
public void itemStateChanged(ItemEvent e)
ffcity = (String)fromCity.getSelectedItem();
ttcity = (String)toCity.getSelectedItem();
dday = (String)dDay.getSelectedItem();
dmon = (String)dMonth.getSelectedItem();
dyear = (String)dYear.getSelectedItem();
adt = (String)adult.getSelectedItem();
cab = (String)Cabin.getSelectedItem();
public void actionPerformed(ActionEvent ae)
if(ae.getActionCommand() == "Date")
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:ds","sa", "");
PreparedStatement stmt = con.prepareStatement("select ifno,vdtime,vatime,vdate1,vdate2,vdate3,efare from airways where fcity = ? and tcity = ? and vdate1 = ? and vdate2 = ? and vdate3 = ?");
stmt.setString(1,ffcity);
stmt.setString(2,ttcity);
stmt.setString(3,dday);
stmt.setString(4,dmon);
stmt.setString(5,dyear);
ResultSet d = stmt.executeQuery();
/* int count=0;
while(d.next())
{count++;
int i = 0;*/
while(d.next())
/*for(int j =1;j<=7;j++)
data[i][j] = rs.getString(j);
System.out.println(" " + data[i][j]);
}i++;*/
System.out.println(d.getInt(1));
System.out.println(d.getDouble(2));
catch(Exception ex)
System.out.println("Error occurred");
System.out.println("Error:"+ex);
table.setVisible(true);
table.setSize(300,200);
private static void createAndShowGUI()
JFrame.setDefaultLookAndFeelDecorated(true);
Reservation r=new Reservation();
JFrame frame = new JFrame("Reservation Form");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//r.pack();
r.setVisible(true);
public static void main(String[] args)
SwingUtilities.invokeLater(new Runnable(){
public void run()
createAndShowGUI();
in this object creation is not happening
when i run this code ...
only jtree is comming..
how can i make it the values of seceted items to come in table
i commented the parts that having error..
when u uncomment it u will get the problem of this codeplease anyone
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