Custom Tree Nodes (itemRenderers)
Hi
I have a a Tree component and i need to assign different itemRenderer to each level of the Tree component.
The Tree component has a variable which contains an array of the itemRenderers which i want to use for different Tree levels.
does anybody know how to do this or can somebody post some example???
thanks M.
ok i have managed asign different states based on listData, i knew i could use this but i thought there will be another way.
to do it you have to override set data function in the itemRenderer
override public function set data(value:Object):void {
super.data = value;
if(TreeListData(super.listData).depth == 1)
levelONE.visible = true;
}else{
levelONE.visible = false;
So i have few states i this itemRenderer which are displayed based on the list dept,
but i want to asign these states dynamicaly from the itemRenderers parent which in this case is a Tree component.
So the general question is how to access a variable in the Tree which will hold the components from Tree's itemRenderer????
Similar Messages
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How to resize a custom tree node like you would a JFrame window?
Hello,
I am trying to resize a custom tree node like you would a JFrame window.
As with a JFrame, when your mouse crosses the Border, the cursor should change and you are able to drag the edge to resize the node.
However, I am faced with a problem. Border cannot detect this and I dont want to use a mouse motion listener (with a large number of nodes, I fear it will be inefficient, calculating every node's position constantly).
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import java.util.EventObject;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;
public class ResizeNode extends JPanel {
AnilTreeCellRenderer2 atcr;
AnilTreeCellEditor2 atce;
DefaultTreeModel treeModel;
JTree tree;
DefaultMutableTreeNode markedNode = null;
public ResizeNode() {
super(new BorderLayout());
treeModel = new DefaultTreeModel(null);
tree = new JTree(treeModel);
tree.setEditable(true);
tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
tree.setCellRenderer(atcr = new AnilTreeCellRenderer2());
tree.setCellEditor(atce = new AnilTreeCellEditor2(tree, atcr));
JScrollPane scrollPane = new JScrollPane(tree);
add(scrollPane,BorderLayout.CENTER);
public void setRootNode(DefaultMutableTreeNode node) {
treeModel.setRoot(node);
treeModel.reload();
public static void main(String[] args){
ResizeNode tb = new ResizeNode();
tb.setPreferredSize(new Dimension(400,200));
JFrame frame = new JFrame("ResizeNode");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(tb);
frame.setSize(400, 200);
frame.pack();
frame.setVisible(true);
tb.populate();
private void populate() {
TextAreaNode2 r = new TextAreaNode2(this);
setRootNode(r);
TextAreaNode2 a = new TextAreaNode2(this);
treeModel.insertNodeInto(a, r, r.getChildCount());
class AnilTreeCellRenderer2 extends DefaultTreeCellRenderer{
TreeBasic panel;
DefaultMutableTreeNode currentNode;
public AnilTreeCellRenderer2() {
super();
public Component getTreeCellRendererComponent
(JTree tree, Object value, boolean selected, boolean expanded,
boolean leaf, int row, boolean hasFocus){
TextAreaNode2 currentNode = (TextAreaNode2)value;
NodeGUI2 gNode = (NodeGUI2) currentNode.gNode;
return gNode.box;
class AnilTreeCellEditor2 extends DefaultTreeCellEditor{
DefaultTreeCellRenderer rend;
public AnilTreeCellEditor2(JTree tree, DefaultTreeCellRenderer r){
super(tree, r);
rend = r;
public Component getTreeCellEditorComponent(JTree tree, Object value,
boolean isSelected, boolean expanded, boolean leaf, int row){
return rend.getTreeCellRendererComponent(tree, value, isSelected, expanded,
leaf, row, true);
public boolean isCellEditable(EventObject event){
return true;
class NodeGUI2 {
final ResizeNode view;
Box box = Box.createVerticalBox();
final JTextArea aa = new JTextArea( 1, 5 );
final JTextArea aaa = new JTextArea( 1, 8 );
NodeGUI2( ResizeNode view_ ) {
this.view = view_;
box.add( aa );
aa.setBorder( BorderFactory.createMatteBorder( 0, 0, 1, 0, Color.GREEN ) );
box.add( aaa );
box.setBorder( BorderFactory.createMatteBorder( 5, 5, 5, 5, Color.CYAN ) );
private Dimension getEditorPreferredSize() {
Insets insets = box.getInsets();
Dimension boxSize = box.getPreferredSize();
Dimension aaSize = aa.getPreferredSize();
Dimension aaaSize = aaa.getPreferredSize();
int height = aaSize.height + aaaSize.height + insets.top + insets.bottom;
int width = Math.max( aaSize.width, aaaSize.width );
if ( width < boxSize.width )
width += insets.right + insets.left + 3; // 3 for cursor
return new Dimension( width, height );
class TextAreaNode2 extends DefaultMutableTreeNode {
NodeGUI2 gNode;
TextAreaNode2(ResizeNode view_) {
gNode = new NodeGUI2(view_);
}the node on the tree is only painted on using the
renderer to do the painting work. A mouse listener
has to be added to the tree, and when moved over an
area, you have to determine if you are over the
border and which direction to update the cursor and
to know which way to resize when dragged. One of the
BasicRootPaneUI has some code that can help determine
that.Thanks for replying. What is your opinion on this alternative idea that I just had?
I am wondering if it might be easier to have a toggle button in the node that you click when you want to resize the node. Then a mouse-down and dragging the mouse will resize the node. Mouse-up will reset the toggle button, and so will mouse down in an invalid area.
Anil -
Custom tree node and DefaultTreeModel
Hello,
I would like to know if it's possible to use the following custom tree node with the DefaultTreeModel:
class MyTreeNode extends DefaultMutableTreeNode{
private String _argument = null;
public MyTreeNode(){}
public MyTreeNode(Object node, String argument){
super(node);
_argument = argument;
}I have tried it and it's not working but I think in theory it should work. Please correct me if I'm wrong.
The problem is that the tree won't display or insert the custom node when the insertNodeAt(...) method of
the DefaultTreeModel is called. I also tried using a custom tree listener and calling the .reload() method directly.
Any help will be very appreciated.
Thanks in advanced.Are you sure it's not being inserted into the model,
and just not being displayed?
Are you calling nodesWereInserted() after your
insertion?Thanks for your reply.
I've modified my app. so that the following method will populate the tree for testing only:
public void populateTree()
MyTreeNode root = new MyTreeNode("Root Node", "test");
DefaultTreeModel treeModel = new DefaultTreeModel(root);
JTree tree = new JTree(treeModel);
tree.setEditable(true);
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
JScrollPane scrollPane = new JScrollPane(tree);
setLayout(new GridLayout(1,0));
add(scrollPane);
int childIdx[] = {0,1};
String p1Name = new String("Parent 1");
String p2Name = new String("Parent 2");
String c1Name = new String("Child 1");
String c2Name = new String("Child 2");
MyTreeNode p1 = new MyTreeNode(p1Name, "test");
MyTreeNode p2 = new MyTreeNode(p2Name, "test");
MyTreeNode c1 = new MyTreeNode(c1Name, "test");
MyTreeNode c2 = new MyTreeNode(c2Name, "test");
treeModel.insertNodeInto(p1, root, 0);
treeModel.insertNodeInto(p2, root, 1);
treeModel.nodesWereInserted(root, childIdx);
treeModel.insertNodeInto(c1, p1, 0);
treeModel.insertNodeInto(c2, p1, 1);
treeModel.nodesWereInserted(p1, childIdx);
treeModel.reload();
}And the result is that the "Root Node" will be displayed with "Parent1" and "Parent2" but "Parent1" won't have any children. Furthermore, if I try to remove "Parent1" using:
treeModel.removeNodeFromParent(p1);I will get an exception saying that node p1 has no parent, which suggests that the parent/child relation
is not being assigned by the model, even though the nodes (p1, p2) are displayed in the tree showing "Root node" as the parent. This is very strange.
Please help. -
Hi
I need to create a custom tree.
Is it posible in flex tree, to have a node, that is a panel component, with a few other components, like textinput or buttons?
Clicking on buttons causes adding or removing new nodes in appropriate place in the tree.
What in fact I need to create, is advanced filter builder (originaly created in GWT), shown here: http://www.smartclient.com/smartgwt/showcase/#featured_filter_builder_grid
The structure of that filter looks like 'very' custom tree
Do you have any idea how to do that, or where can I find any hints or solutions?Here is my tree renderer:
package
import mx.controls.listClasses.IDropInListItemRenderer;
import mx.controls.treeClasses.*;
public class treeRendererFilter extends TreeItemRenderer
private var customerFilterSet:Boolean = false;
public function treeRendererFilter()
super();
override public function set data(value:Object):void
super.data = value;
if (value.@name == "Customer Reporting" && !customerFilterSet)
var filter:customerReportingFilter = new customerReportingFilter();
addChild(filter);
filter.data = value;
filter.height = 25;
filter.width = 280;
customerFilterSet = true;
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
super.updateDisplayList(unscaledWidth, unscaledHeight);
if (data.@name == "Customer Reporting")
label.width -= getChildAt(1).width;
getChildAt(1).x = label.x + label.width;
getChildAt(1).visible = true;
else
if (customerFilterSet)
getChildAt(1).visible = false;
<?xml version="1.0" encoding="utf-8"?>
<mx:FormItem xmlns:mx="http://www.adobe.com/2006/mxml" width="100%" height="100%"
direction="horizontal" fontSize="10">
<mx:Script>
<![CDATA[
override public function set data(value:Object):void
if(value != null)
exclude.data = value;
comments.data = value;
override public function get data():Object
return data;
]]>
</mx:Script>
<mx:HBox width="100%" color="blue">
<mx:CheckBox id="exclude" label="Excluding Skus"/>
<mx:CheckBox id="comments" label="Customer Comments"/>
</mx:HBox>
</mx:FormItem>
HTH -
How to add custom ADF Tree Node icon
Hi All,
i am using below code in style sheet to set the tree node icon,
af|tree::node-icon:nodetype-collapsed
but i don't have any idea how to add getnodetype() method in the node class, (I am using Jdeveloper 11.1.1.2.0). please suggest me the steps to achive it.
Thanks,
Maheshi did as you suggested, but i am not getting any image, below is my source
<nodeDefinition DefName="com.mahesh.SSCExplorer.model.ROview.OrdrHdrVO"
Name="OrdrHdr20"
TargetIterator="${bindings.OrdrHdr2Iterator}"
ClosedIcon="/Nuvola_filesystems_folder.png"
OpenIcon="/Nuvola_filesystems_folder.png"
Icon="/Nuvola_filesystems_folder.png">
please suggest is there any other settings i need to do.
Thanks,
Mahesh -
Creation of a Popup Menu for a Tree Node
Hi Ppl,
I need to create a Pop-up Menu for a tree node in WebDynpro Application, please give me a "How to .." sort of material or a link which would have same sort of information...
Also, My requirement is to call the pop-up on the right click of mouse on the tree node, please let me know on which event handler I can call it ? Do I require a custom event handler for it ?
Thanks in advance
AnishHi Anish,
You simply add a Tree UI element, and then right-click the tree UI element and insert a TreeNode element.
To the TreeNode element you can add a menu, and then to this menu you can add menu items. When the user right click the tree node, the menu item is displayed. If the user clicks the menu item, the action for the menuitem is run.
Hope that helps.
Daniel -
Help with building a JTree using tree node and node renderers
Hi,
I am having a few problems with JTree's. basically I want to build JTree from a web spider. The webspide searches a website checking links and stores the current url that is being processed as a string in the variable msg. I wan to use this variable to build a JTree in a new class and then add it to my GUI. I have created a tree node class and a renderer node class, these classes are built fine. can someone point me in the direction for actually using these to build my tree in a seperate class and then displaying it in a GUI class?
*nodeRenderer.java
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.net.*;
public class nodeRenderer extends DefaultTreeCellRenderer
implements TreeCellRenderer
public static Icon icon= null;
public nodeRenderer() {
icon = new ImageIcon(getClass().getResource("icon.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);
treeNode node = (treeNode)(((DefaultMutableTreeNode)value).getUserObject());
if(icon != null) // set a custom icon
setOpenIcon(icon);
setClosedIcon(icon);
setLeafIcon(icon);
return this;
*treeNode.java
*this is the class to represent a node
import javax.swing.*;
import javax.swing.tree.*;
import java.util.*;
import java.net.*;
* Class used to hold information about a web site that has
* been searched by the spider class
public class treeNode
*Url from the WebSpiderController Class
*that is currently being processed
public String msg;
treeNode(String urlText)
msg = urlText;
String getUrlText()
return msg;
//gui.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class gui extends JFrame implements Runnable
*declare variable, boolean
*thread, a object and a center
*pane
protected URL urlInput;
protected Thread bgThread;
protected boolean run = false;
protected WebSpider webSpider;
public gui()
*create the gui here
setTitle("Testing Tool");
setSize(600,600);
//add Buttons to the tool bar
start.setText("Start");
start.setActionCommand("Start");
toolBar.add(start);
ButtonListener startListener = new ButtonListener();
start.addActionListener(startListener);
cancel.setText("Cancel");
cancel.setActionCommand("Cancel");
toolBar.add(cancel);
ButtonListener cancelListener = new ButtonListener();
cancel.addActionListener(cancelListener);
close.setText("Close");
close.setActionCommand("Close");
toolBar.add(close);
ButtonListener closeListener = new ButtonListener();
close.addActionListener(closeListener);
//creat a simple form
urlLabel.setText("Enter URL:");
urlLabel.setBounds(100,36,288,24);
formTab.add(urlLabel);
url.setBounds(170,36,288,24);
formTab.add(url);
current.setText("Currently Processing: ");
current.setBounds(100,80,288,24);
formTab.add(current);
//add scroll bars to the error messages screen and website structure
errorPane.setAutoscrolls(true);
errorPane.setHorizontalScrollBarPolicy(javax.swing.
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
errorPane.setVerticalScrollBarPolicy(javax.swing.
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
errorPane.setOpaque(true);
errorTab.add(errorPane);
errorPane.setBounds(0,0,580,490);
errorText.setEditable(false);
errorPane.getViewport().add(errorText);
errorText.setBounds(0,0,600,550);
treePane.setAutoscrolls(true);
treePane.setHorizontalScrollBarPolicy(javax.swing.
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
treePane.setVerticalScrollBarPolicy(javax.swing.
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
treePane.setOpaque(true);
treeTab.add(treePane);
treePane.setBounds(0,0,580,490);
treeText.setEditable(false);
treePane.getViewport().add(treeText);
treeText.setBounds(0,0,600,550);
//create the tabbed window
centerPane.setBorder(new javax.swing.border.EtchedBorder());
formTab.setLayout(null);
errorTab.setLayout(null);
treeTab.setLayout(null);
centerPane.addTab("Search Parameters", formTab);
centerPane.addTab("Error Messages", errorTab);
centerPane.addTab("Website Structure", treeTab);
//add the tool bar and tabbed pane
getContentPane().add(toolBar, java.awt.BorderLayout.NORTH);
getContentPane().add(centerPane, java.awt.BorderLayout.CENTER);
*create the tool bar pane, a center pane, add the buttons,
*labels, tabs, a text field for user input here
javax.swing.JPanel toolBar = new javax.swing.JPanel();
javax.swing.JButton start = new javax.swing.JButton();
javax.swing.JButton cancel = new javax.swing.JButton();
javax.swing.JButton close = new javax.swing.JButton();
javax.swing.JTabbedPane centerPane = new javax.swing.JTabbedPane();
javax.swing.JPanel formTab = new javax.swing.JPanel();
javax.swing.JLabel urlLabel = new javax.swing.JLabel();
javax.swing.JLabel current = new javax.swing.JLabel();
javax.swing.JTextField url = new javax.swing.JTextField();
javax.swing.JPanel errorTab = new javax.swing.JPanel();
javax.swing.JTextArea errorText = new javax.swing.JTextArea();
javax.swing.JScrollPane errorPane = new javax.swing.JScrollPane();
javax.swing.JPanel treeTab = new javax.swing.JPanel();
javax.swing.JTextArea treeText = new javax.swing.JTextArea();
javax.swing.JScrollPane treePane = new javax.swing.JScrollPane();
javax.swing.JTree searchTree = new javax.swing.JTree();
*show the gui
public static void main(String args[])
(new gui()).setVisible(true);
*listen for the button presses and set the
*boolean flag depending on which button is pressed
class ButtonListener implements ActionListener
public void actionPerformed(ActionEvent event)
Object object = event.getSource();
if (object == start)
run = true;
startActionPerformed(event);
if (object == cancel)
run = false;
startActionPerformed(event);
if (object == close)
System.exit(0);
*this method is called when the start or
*cancel button is pressed.
void startActionPerformed (ActionEvent event)
if (run == true && bgThread == null)
bgThread = new Thread(this);
bgThread.start();
if (run == false && bgThread != null)
webSpider.cancel();
*this mehtod will start the background thred.
*the background thread is required so that the
*GUI is still displayed
public void run()
try
webSpider = new WebSpider(this);
webSpider.clear();
urlInput = new URL(url.getText());
webSpider.addURL(urlInput);
webSpider.run();
bgThread=null;
catch (MalformedURLException e)
addressError addErr = new addressError();
addErr.addMsg = "URL ERROR - PLEASE CHECK";
SwingUtilities.invokeLater(addErr);
*this method is called by the web spider
*once a url is found. Validation of navigation
*happens here.
public boolean urlFound(URL urlInput,URL url)
CurrentlyProcessing pro = new CurrentlyProcessing();
pro.msg = url.toString();
SwingUtilities.invokeLater(pro);
if (!testLink(url))
navigationError navErr = new navigationError();
navErr.navMsg = "Broken Link "+url+" caused on "+urlInput+"\n";
return false;
if (!url.getHost().equalsIgnoreCase(urlInput.getHost()))
return false;
else
return true;
*this method is called internally to check
*that a link works
protected boolean testLink(URL url)
try
URLConnection connection = url.openConnection();
connection.connect();
return true;
catch (IOException e)
return false;
*this method is called when an error is
*found.
public void URLError(URL url)
*this method is called when an email
*address is found
public void emailFound(String email)
/*this method will update any errors found inc
*address errors and broken links
class addressError implements Runnable
public String addMsg;
public void run()
errorText.append(addMsg);
current.setText("Currently Processing: "+ addMsg);
class navigationError implements Runnable
public String navMsg;
public void run()
errorText.append(navMsg);
*this method will update the currently
*processing field on the GUI
class CurrentlyProcessing implements Runnable
public String msg;
public void run()
current.setText("Currently Processing: " + msg );
//webspider.java
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import javax.swing.tree.*;
import javax.swing.*;
*this class implements the spider.
public class WebSpider extends HTMLEditorKit
*make a collection of the URL's
protected Collection urlErrors = new ArrayList(3);
protected Collection urlsWaiting = new ArrayList(3);
protected Collection urlsProcessed = new ArrayList(3);
//report URL's to this class
protected gui report;
*this flag will indicate whether the process
*is to be cancelled
protected boolean cancel = false;
*The constructor
*report the urls to the wui class
public WebSpider(gui report)
this.report = report;
*get the urls from the above declared
*collections
public Collection getUrlErrors()
return urlErrors;
public Collection getUrlsWaiting()
return urlsWaiting;
public Collection getUrlsProcessed()
return urlsProcessed;
* Clear all of the collections.
public void clear()
getUrlErrors().clear();
getUrlsWaiting().clear();
getUrlsProcessed().clear();
*Set a flag that will cause the begin
*method to return before it is done.
public void cancel()
cancel = true;
*add the entered url for porcessing
public void addURL(URL url)
if (getUrlsWaiting().contains(url))
return;
if (getUrlErrors().contains(url))
return;
if (getUrlsProcessed().contains(url))
return;
/*WRITE TO LOG FILE*/
log("Adding to workload: " + url );
getUrlsWaiting().add(url);
*process a url
public void processURL(URL url)
try
/*WRITE TO LOGFILE*/
log("Processing: " + url );
// get the URL's contents
URLConnection connection = url.openConnection();
if ((connection.getContentType()!=null) &&
!connection.getContentType().toLowerCase().startsWith("text/"))
getUrlsWaiting().remove(url);
getUrlsProcessed().add(url);
log("Not processing because content type is: " +
connection.getContentType() );
return;
// read the URL
InputStream is = connection.getInputStream();
Reader r = new InputStreamReader(is);
// parse the URL
HTMLEditorKit.Parser parse = new HTMLParse().getParser();
parse.parse(r,new Parser(url),true);
catch (IOException e)
getUrlsWaiting().remove(url);
getUrlErrors().add(url);
log("Error: " + url );
report.URLError(url);
return;
// mark URL as complete
getUrlsWaiting().remove(url);
getUrlsProcessed().add(url);
log("Complete: " + url );
*start the spider
public void run()
cancel = false;
while (!getUrlsWaiting().isEmpty() && !cancel)
Object list[] = getUrlsWaiting().toArray();
for (int i=0;(i<list.length)&&!cancel;i++)
processURL((URL)list);
* A HTML parser callback used by this class to detect links
protected class Parser extends HTMLEditorKit.ParserCallback
protected URL urlInput;
public Parser(URL urlInput)
this.urlInput = urlInput;
public void handleSimpleTag(HTML.Tag t,MutableAttributeSet a,int pos)
String href = (String)a.getAttribute(HTML.Attribute.HREF);
if((href==null) && (t==HTML.Tag.FRAME))
href = (String)a.getAttribute(HTML.Attribute.SRC);
if (href==null)
return;
int i = href.indexOf('#');
if (i!=-1)
href = href.substring(0,i);
if (href.toLowerCase().startsWith("mailto:"))
report.emailFound(href);
return;
handleLink(urlInput,href);
public void handleStartTag(HTML.Tag t,MutableAttributeSet a,int pos)
handleSimpleTag(t,a,pos); // handle the same way
protected void handleLink(URL urlInput,String str)
try
URL url = new URL(urlInput,str);
if (report.urlFound(urlInput,url))
addURL(url);
catch (MalformedURLException e)
log("Found malformed URL: " + str);
*log the information of the spider
public void log(String entry)
System.out.println( (new Date()) + ":" + entry );
I have a seperate class for parseing the HTML. Any help would be greatly appreciated
mrvHi Sorry to be a pain again,
I have re worked the gui class so it looks like this now:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class gui extends JFrame implements Runnable
*declare variable, boolean
*thread, a object and a center
*pane
protected URL urlInput;
protected Thread bgThread;
protected boolean run = false;
protected WebSpider webSpider;
public String msgInfo;
public String brokenUrl;
public String goodUrl;
public String deadUrl;
protected DefaultMutableTreeNode rootNode;
protected DefaultTreeModel treeModel;
public gui()
*create the gui here
setTitle("Testing Tool");
setSize(600,600);
//add Buttons to the tool bar
start.setText("Start");
start.setActionCommand("Start");
toolBar.add(start);
ButtonListener startListener = new ButtonListener();
start.addActionListener(startListener);
cancel.setText("Cancel");
cancel.setActionCommand("Cancel");
toolBar.add(cancel);
ButtonListener cancelListener = new ButtonListener();
cancel.addActionListener(cancelListener);
close.setText("Close");
close.setActionCommand("Close");
toolBar.add(close);
ButtonListener closeListener = new ButtonListener();
close.addActionListener(closeListener);
//creat a simple form
urlLabel.setText("Enter URL:");
urlLabel.setBounds(100,36,288,24);
formTab.add(urlLabel);
url.setBounds(170,36,288,24);
formTab.add(url);
current.setText("Currently Processing: ");
current.setBounds(100,80,288,24);
formTab.add(current);
//add scroll bars to the error messages screen and website structure
errorPane.setAutoscrolls(true);
errorPane.setHorizontalScrollBarPolicy(javax.swing.
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
errorPane.setVerticalScrollBarPolicy(javax.swing.
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
errorPane.setOpaque(true);
errorTab.add(errorPane);
errorPane.setBounds(0,0,580,490);
errorText.setEditable(false);
errorPane.getViewport().add(errorText);
errorText.setBounds(0,0,600,550);
treePane.setAutoscrolls(true);
treePane.setHorizontalScrollBarPolicy(javax.swing.
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
treePane.setVerticalScrollBarPolicy(javax.swing.
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
treePane.setOpaque(true);
treeTab.add(treePane);
treePane.setBounds(0,0,580,490);
treeText.setEditable(false);
treePane.getViewport().add(treeText);
treeText.setBounds(0,0,600,550);
//JTree
// NEW CODE
rootNode = new DefaultMutableTreeNode("Root Node");
treeModel = new DefaultTreeModel(rootNode);
treeModel.addTreeModelListener(new MyTreeModelListener());
tree = new JTree(treeModel);
tree.setEditable(true);
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
treeText.add(tree);
//create the tabbed window
centerPane.setBorder(new javax.swing.border.EtchedBorder());
formTab.setLayout(null);
errorTab.setLayout(null);
treeTab.setLayout(null);
centerPane.addTab("Search Parameters", formTab);
centerPane.addTab("Error Messages", errorTab);
centerPane.addTab("Website Structure", treeTab);
//add the tool bar and tabbed pane
getContentPane().add(toolBar, java.awt.BorderLayout.NORTH);
getContentPane().add(centerPane, java.awt.BorderLayout.CENTER);
*create the tool bar pane, a center pane, add the buttons,
*labels, tabs, a text field for user input here
javax.swing.JPanel toolBar = new javax.swing.JPanel();
javax.swing.JButton start = new javax.swing.JButton();
javax.swing.JButton cancel = new javax.swing.JButton();
javax.swing.JButton close = new javax.swing.JButton();
javax.swing.JTabbedPane centerPane = new javax.swing.JTabbedPane();
javax.swing.JPanel formTab = new javax.swing.JPanel();
javax.swing.JLabel urlLabel = new javax.swing.JLabel();
javax.swing.JLabel current = new javax.swing.JLabel();
javax.swing.JTextField url = new javax.swing.JTextField();
javax.swing.JPanel errorTab = new javax.swing.JPanel();
javax.swing.JTextArea errorText = new javax.swing.JTextArea();
javax.swing.JScrollPane errorPane = new javax.swing.JScrollPane();
javax.swing.JPanel treeTab = new javax.swing.JPanel();
javax.swing.JTextArea treeText = new javax.swing.JTextArea();
javax.swing.JScrollPane treePane = new javax.swing.JScrollPane();
javax.swing.JTree tree = new javax.swing.JTree();
*show the gui
public static void main(String args[])
(new gui()).setVisible(true);
*listen for the button presses and set the
*boolean flag depending on which button is pressed
class ButtonListener implements ActionListener
public void actionPerformed(ActionEvent event)
Object object = event.getSource();
if (object == start)
run = true;
startActionPerformed(event);
if (object == cancel)
run = false;
startActionPerformed(event);
if (object == close)
System.exit(0);
*this method is called when the start or
*cancel button is pressed.
void startActionPerformed (ActionEvent event)
if (run == true && bgThread == null)
bgThread = new Thread(this);
bgThread.start();
//new line of code
treeText.addObject(msgInfo);
if (run == false && bgThread != null)
webSpider.cancel();
*this mehtod will start the background thred.
*the background thread is required so that the
*GUI is still displayed
public void run()
try
webSpider = new WebSpider(this);
webSpider.clear();
urlInput = new URL(url.getText());
webSpider.addURL(urlInput);
webSpider.run();
bgThread = null;
catch (MalformedURLException e)
addressError addErr = new addressError();
addErr.addMsg = "URL ERROR - PLEASE CHECK";
SwingUtilities.invokeLater(addErr);
*this method is called by the web spider
*once a url is found. Validation of navigation
*happens here.
public boolean urlFound(URL urlInput,URL url)
CurrentlyProcessing pro = new CurrentlyProcessing();
pro.msg = url.toString();
SwingUtilities.invokeLater(pro);
if (!testLink(url))
navigationError navErr = new navigationError();
navErr.navMsg = "Broken Link "+url+" caused on "+urlInput+"\n";
brokenUrl = url.toString();
return false;
if (!url.getHost().equalsIgnoreCase(urlInput.getHost()))
return false;
else
return true;
*this method is returned if there is no link
*on a web page, e.g. there us a dead end
public void urlNotFound(URL urlInput)
deadEnd dEnd = new deadEnd();
dEnd.dEMsg = "No links on "+urlInput+"\n";
deadUrl = urlInput.toString();
*this method is called internally to check
*that a link works
protected boolean testLink(URL url)
try
URLConnection connection = url.openConnection();
connection.connect();
goodUrl = url.toString();
return true;
catch (IOException e)
return false;
*this method is called when an error is
*found.
public void urlError(URL url)
*this method is called when an email
*address is found
public void emailFound(String email)
/*this method will update any errors found inc
*address errors and broken links
class addressError implements Runnable
public String addMsg;
public void run()
current.setText("Currently Processing: "+ addMsg);
errorText.append(addMsg);
class navigationError implements Runnable
public String navMsg;
public void run()
errorText.append(navMsg);
class deadEnd implements Runnable
public String dEMsg;
public void run()
errorText.append(dEMsg);
*this method will update the currently
*processing field on the GUI
public class CurrentlyProcessing implements Runnable
public String msg;
//new line
public String msgInfo = msg;
public void run()
current.setText("Currently Processing: " + msg );
* NEW CODE
* NEED THIS CODE SOMEWHERE
* treeText.addObject(msgInfo);
public DefaultMutableTreeNode addObject(Object child)
DefaultMutableTreeNode parentNode = null;
TreePath parentPath = tree.getSelectionPath();
if (parentPath == null)
parentNode = rootNode;
else
parentNode = (DefaultMutableTreeNode)
(parentPath.getLastPathComponent());
return addObject(parentNode, child, true);
public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent,
Object child)
return addObject(parent, child, false);
public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent,
Object child,boolean shouldBeVisible)
DefaultMutableTreeNode childNode = new DefaultMutableTreeNode(child);
if (parent == null)
parent = rootNode;
treeModel.insertNodeInto(childNode, parent, parent.getChildCount());
if (shouldBeVisible)
tree.scrollPathToVisible(new TreePath(childNode.getPath()));
return childNode;
public class MyTreeModelListener implements TreeModelListener
public void treeNodesChanged (TreeModelEvent e)
DefaultMutableTreeNode node;
node = (DefaultMutableTreeNode)
(e.getTreePath().getLastPathComponent());
try
int index = e.getChildIndices()[0];
node = (DefaultMutableTreeNode)
(node.getChildAt(index));
catch (NullPointerException exc)
public void treeNodesInserted(TreeModelEvent e)
public void treeStructureChanged(TreeModelEvent e)
public void treeNodesRemoved(TreeModelEvent e)
I beleive that this line of code is required:
treeText.addObject(msgInfo);
I have placed it where the action events start the spider, but i keep getting this error:
cannot resolve symbol
symbol : method addObject (java.lang.String)
location: class javax.swing.JTextArea
treeText.addObject(msgInfo);
Also the jtree is not showing the window that I want it to and I am not too sure why. could you have a look to see why? i think it needs a fresh pair of eyes.
Many thanks
MrV -
Update tree node icon, better way?
Hi,.
I have my own custom renderer for my JTree....such as
public class MyTreeNodeRenderer extends JLabel implements TreeCellRenderer {
public Component getTreeCellRendererComponent(
JTree treeVal,
Object valueVal,
boolean selectedVal,
boolean expandedVal,
boolean leafVal,
int rowVal,
boolean hasFocusVal) {
MyTreeNode node = (MyTreeNode) valueVal;
// get the latest type for this node
node.type = getType(node);
if (node.type == 1) {
setIcon(TYPE1_ICON);
else {
setIcon(TYPE_BASIC_ICON);
return this;
}...intially the tree nodes have their icons, as they should...later on their "type" is updated...so instead of being 1..its now something else...so the icon should change.....but it doesnt occur fast enough...so i added this to my renderer
public void doRepaint() {
repaint();
myTree.repaint();
}basically anytime i needed to update the icon in the tree i called the doRepaint when i want the new icon to appear in the tree..that helped somewhat..but it is still kinda slow....any ideas how to do this?valueForPathChanged() serves different purposes as you can see from its description. You need to call treeModel.nodeChanged(node) after your node changed its "type". If you don't want to hold or don't have treeModel reference you could use tree classes from .useful library and be able to call nodeChanged() directly from a node that has been changed.
Denis Krukovsky
http://dotuseful.sourceforge.net/ -
How to set the control-on hierarchical tree nodes
Hi,
I have created form in which at the left it has hierarchical tree structure(BOM) and towards the right it brings up the query results for selected node.
Now, I have a button upon clicking which I navigate to the root node by issuing
"Ftree.set_Tree_selection(htree, 1, Ftree.select_on);".
But, it cannot automatically run the ' when-tree-node-selected' trigger '.
any solution???
Its really urgent.I have a customer demo on monday.
Please help me asap.
regards,
Nagadeep.Hello Nagadeep,
couldn't you just put the code from the trigger into a procedure
and run that after the navigation to the item?
Just a thought,
Bernd
The docs state that:
No programmatic action will cause the When-Tree-Node-Selected trigger to fire. Only end-user action will generate an event.
Probably due to performance reasons.
Bernd
Message was edited by:
Bernd Prechtl -
How to hide the default arrow icon of af:tree node
Hi All,
I am using Oracle JDeveloper 11g R2.
I want to hide the arrow icon which is displayed by default with af:tree node. The use case is to display custom icons for all the nodes. The problem is that when I am customizing icons of tree node, it is showing arrow as well as the icon with each node. Which doesn't seems fine. Can any one help/guide on how to hide the default af:tree node arrow icon.
Thanks in advance.
Regards
Bilal
Edited by: Bilal on 29-May-2012 01:32Hi,
Use Css to change the icon style:
af|treeTable::expanded-icon {
content: url("/adf/1.gif");//content : none;
outline: none ;
af|treeTable::collapsed-icon {
content: url("/adf/2.gif");//content : none;
outline: none ;
af|treeTable::leaf-icon {
content: url("/adf/3.gif");//content : none;
outline: none ;
Regards,
Raj Gopal K -
How to find the coordinates of a mouse click in a Tree node ?
Hello
I have a JTree that have few nodes. The nodes contain an icon and a label (using custom cell renderer) and I want to receive right clicks on the icon and show a popup menu.
The problem is I can only get the right click on the whole tree node, not only the icon.
I tried two approaches:
1. register the mouse listener directly with the icon in the cell renderer. That doesnt work since the events received by the tree node do not propagate to its sub-components.
2. Register the event with the JTree itself and then try to find which part of the tree node was clicked (see if it was within the coordinates of the icon).
But I cant get the node's coordinates or width.
I tried using SwingUtilities.convertPoint or SwingUtilities.ConvertMouseEvent but it just doesnt work with DefaultMutableTreeNode.
Any ideas how to do it ?user11973359 wrote:
1. register the mouse listener directly with the icon in the cell renderer. That doesnt work since the events received by the tree node do not propagate to its sub-components.No, it doesn't work because a renderer isn't added to any component hierarchy. It isn't in any way a 'sub-component'.
Read about editor and renderer concepts in the Oracle tutorial on How to Use Tables.
user11973359 wrote:
2. Register the event with the JTree itself and then try to find which part of the tree node was clicked (see if it was within the coordinates of the icon).
But I cant get the node's coordinates or width.<tt>getPathForLocation(...) </tt>in conjunction with<tt> getPathBounds(...)</tt>.
db -
Loading Tree Node/Leaf causing numerous errors
I am loading a tree with UNSPSC codes using an application engine program with code borrowed from a delivered app engine program. The code loads most of the codes, however I receive numerous errors as follows:
Node not Found (92,3209) - I get this a lot but the data still loads in both PSTREENODE and PSTREELEAF
Return: 805 - ORA-00001: unique constraint (FS.PS_PSTREELEAF) violated
Failed SQL stmt:UPDATE PSTREELEAF SET TREE_NODE_NUM = :1, OLD_TREE_NODE_NUM = 'N' WHERE SETID = :2 AND SETCNTRLVALUE = :3 AND TREE_NAME = :4 AND EFFDT = TO_DATE(:5,'YYYY-MM-DD') AND OLD_TREE_NODE_NUM = 'Y' AND TREE_NODE_NUM = :6
Tree Save error (92,3061)
-- This error will rollback my changes to my last commit point, which, because of this error, I am committing after every value (saving tree, closing tree, and reopening the tree).
Node index error (0,0)
Node insert error (0,0)
-- These errors still allow me to enter the data.
A node without a parent was detected: %1 (25,22)
-- This error causes an abend.
The code used to update the tree is very simple (this code was copied verbatim from PV_CP_LOAD along with additional functions):
REM ****************************************************************************************;
Function AddToTree(&CAT_ID, &CAT_ID_PAR, &CAT_NAME, &ACCOUNT, &SIBLING)
REM ****************************************************************************************;
rem Add child to parent;
If &CAT_ID <> &FIRST_NODE Then
&MYNODE = &MS_TREE.FindNode(&CAT_ID, "");
If None(&MYNODE) Then
&MYNODE = &MS_TREE.FindNode(&CAT_ID_PAR, "");
If All(&MYNODE) Then
&NEWNODE = &MYNODE.InsertChildNode(&CAT_ID);
If All(&NEWNODE) Then
&NEWLEAF = &NEWNODE.INSERTDYNCHILDLEAF();
&NodeCount = &NodeCount + 1;
End-If;
End-If;
Else
rem in case tree node is already there, but category isn't;
rem addcategories(&CAT_ID, &CAT_NAME, &ACCOUNT, &CATEGORY_REC);
End-If;
End-If;
End-Function;
I am getting roughly 50% failure rate.
Is there a database issue? Configuration of my Tree?What I discovered is that Node API method INSERTDYNCHILDLEAF tries to re-number all the leafs inserted each time it is called. However, it doesn't check to see if the TREE_NODE_NUM already exists. Since the TREE_NODE_NUM column is a key, it causes a unique constraint error.
I pointed this out to Oracle, however, since I was using this function in a custom app engine program, they would not look at the problem. My app engine trace clearly showed the problem.
I ended up re-writing the program to insert directly into the PSTREENODE and PSTREELEAF tables, controlling the TREE_NODE_NUM and PARENT_NODE_NUM columns myself. The result was a tree with 20499 rows with 0 audit errors. -
Hi All,
I have this requirement.
On ALV Tree node, when user places cursor then i should display some text as quick info.
while create node i have used ICON <- left arrow, i cannot use other ICOn as functional person need this icon only.
During Add_Node, if I pass icon through node layout then its showing nothing, Instead if I pass icon through item layout, then its showing SAP standard ICON text left arrow , but i need custom text write text there.
I tried using Context_menu_req as well, even that didnt worked. Any ideas/views will be highly appreciated.
Thanks n RegardsHi Mr A.
You can try the following:
DATA: l_node_text TYPE lvc_value.
DATA: ls_item_layo TYPE lvc_s_layi,
lt_item_layo TYPE lvc_t_layi.
l_node_text = 'UR Text'
ls_item_layo-style = gs_detail-color_code.
ls_item_layo-t_image = gs_detail-icon.
APPEND ls_item_layo TO lt_item_layo.
After the above mentioned statement, you may call 'Add Node' method of ALV Tree.
Regards
Waz -
Af:tree - how do I highlight the selected tree node?
af:tree
I checked the generated CSS file. I found that when a tree node is selected, the related CSS attribute is:
.xj:link{
font-family:Arial,Helvetica,Geneva,sans-serif;
font-size:10pt;
font-weight:normal;
color:#663300
I created a customized CSS attribute, but then all of the links have the customized CSS attributes.
How do I just highlight the selected tree node link?
Thanks,
--Toddtry doing the onclick javascript method
you have to place it on the node element and id must be made dynamic
for this use 'this.id'
by which the current id of the node is passed
and by capturing the id name in a var
use the same for invoking its selected property and make it true
like this
var currentid = this.id;
this.form.currentid.selected = true; -
I need to create a simple Queue class for Binary Tree Node. The class consist of only enqueue and dequeue, I cannot use the Collection Interface though. But I have no idea how to do it. Below is my Binary Tree Node Class.
public class BTNode {
private customer item;
private BTNode left;
private BTNode right;
public BTNode() {// constructor
item = null;
left = right = null;
public BTNode(customer newItem) {// constructor
item = newItem.clone();
left = right = null;
public void setItem(customer newItem) {// set methods
item = newItem.clone();
public void setLeft(BTNode newLeft) {
left = newLeft;
public void setRight(BTNode newRight) {
right = newRight;
public customer getItem() { // get methods
return item;
public BTNode getLeft() {
return left;
public BTNode getRight() {
return right;
public class Queue1 extends BTNode {
public Queue1() {
super();
public void enqueue(BTNode newItem) {
public void dequeue() {
}public class Queue1 extends BTNode {Why do you think that the queue should extend BTNode?
You probably want to aggregate a List.
Kaj
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