Tree node link using htmlb
Hi all
Do any one give me the code to make the object in the tree node as link to navigate to another page,
Note:Onmouseover alone the object gets the link and I need to get the hand symbol
reg
balaji
Hi,
In the below code i need to make Course type 1A, Course type 2A, Course type 3A as a link to navigate to other pages. Please guide me reagarding this,
<hbj:treeNode id="e_root" text="Desk" isOpen="true" >
<hbj:treeNode id="e_cga" text="Course group A" isOpen="true" tooltip="Course group A">
<hbj:treeNode id="e_cta" text="Course type 1A" tooltip="Course type 1A "/>
<hbj:treeNode id="e_ctb" text="Course type 2A" tooltip="Course type 2A "/>
<hbj:treeNode id="e_ctc" text="Course type 3A" tooltip="Course type 3A "/>
</hbj:treeNode>
<hbj:treeNode id="e_cgb" text="Course group B" isOpen="true" tooltip="Course group B" >
<hbj:treeNode id="e_ct1" text="Course type 1B" tooltip="Course type 1B " />
<hbj:treeNode id="e_ct2" text="Course type 2B" tooltip="Course type 2B " />
<hbj:treeNode id="e_ct3" text="Course type 3B" tooltip="Course type 3B "/>
</hbj:treeNode>
</hbj:treeNode>
Waiting for replies,
Similar Messages
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Hello,
I am trying to configure a Tree in APEX 4.1 and I'm not sure if what I am trying to do is possible. Here is the situation: I work for a university that has the following colleges:
College of Arts & Communication
College of Business Administration
College of Education
College of Liberal Arts
College of Professional Studies
College of Sciences
Each of the above listed colleges have multiple majors that are unique to that college.
So my tree uses the college name for the parent node and each of the majors for that college as the child nodes. Each Major has a major code assigned to it, so when a user clicks on a major, a page loads with information about the students in that major. Colleges, however, do not have a major code and so if the user clicks on the college name in the tree, the page loads but has no data. So, what I would like is that if a user clicks on a mjor, the pages loads like currently set up, but if the user clicks on a college name, a different page loads with information about that college.
So the question is: Is it possible to have one page load, say Page 21, when a major (child node) is selected, and another page, Page 22, when a college (parent node) is selected?
Thanks,
BobYes, that is very much possible to call different urls/pages from different tree nodes. You need to format your query to use independent select statements (for each node) and finally use UNION to form the tree.
For example, you can do something like this:
SELECT CASE WHEN connect_by_isleaf = 1 THEN 0
WHEN level = 1 THEN 1
ELSE -1
END as status
, level
, name as title
, icon
, id as value
, tip as tooltip
, url as link
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from
-- select statement for the parent node
UNION
-- select statement for the first/immediate child node
UNION
-- select statement for the level 2 child
start with parent is null
connect by NOCYCLE prior id = parent
order siblings by displayIn each select statement, you can specify the required link/url.
I hope this helps. -
Hiding Page 0 Items and Tree Node Links
I have two issues I'm trying to work out:
1) I have created a tree on page 0 that I want to appear on all of my REPORT pages, so the user can filter the reports regardless of which page they're on. The problem is that the tree is also appearing on the login page and the Home page. Is there any way to hide the tree on the login and home pages but have it appear on all other pages? I'm trying to avoid having to create the tree on every single report page.
2) I need the tree to work like this: the user clicks any node in the tree, and all reports (on multiple pages) are filtered based on the node selected. So I don't actually want the nodes to be links to a report, I just want the reports to be filtered based on the node value selected. Then I'll have tabs to navigate between the different reports. Is this possible?
Thanks.I dunno if you correct it, but there was small mistake in the JS code - a closing bracket was missing
$s('P0_TREE_NODE', $(this.triggeringElement).parents('li:first').attr('id'));
it looks like the node value IS being stored in the session stateI hope you checked for items in page 0 (it should then list down page 0 items including P0_TREE_NODE) when you searched for session state(it defaults to whichever page is run currently)
If these two are working fine, it has to be some page process/computation/item source/item default that modifies the item value when you move between pages.
To find this: Turn debug on, reload the page , click on a tree node, then redirect to some other page and then check the debug report and see if the page 0 item: P0_TREE_NODE is being set/reset/modified elsewhere. -
Is there a way to define a linkage id to set the icon for the
tree component in external XML? This is what I tried and it does
not work.
<node label="Test" data="SomeID" icon="SomeLinkageID">
The tree node is using the default folder icon. I know I
could set the icon after it is loaded but why cann't I just throw
in something to define the icon in the XML?
ThanksHi,
Could you elaborate a litle more exacly what you need to do?
I found the link http://help.sap.com/saphelp_470/helpdata/en/86/8280db12d511d5991b00508b6b8b11/content.htm that maybe assist you.
Please remember to evaluate the replays, this incentive the SDN to keep growing,
regards,
Fabio -
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
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Hi guys,
I want to search a tree node by using a textbox and a button item. I have implemented all required items and regions into my page. I think that, i can do this by using dynamic action. So I wrote a small script (jquery) to use in dynamic action in button click event. It gets the value of the textbox item and tries to use this value in tree's search method. By the way I specified a static ID for my tree region. (As you can see it is TREEID). But it doesn't work. Maybe usage of the method is different.
So ,
1 : The method usage is right?
2 : Do you have any other idea about how can i do this search stuff.
$("#TREEID").tree("search", document.getElementById("P300_SEARCH_TEXT").value);
Database : Oracle11g
Apex version : 4.1
ThanksMimi gave a very good start though. I have not worked with a tree before, but those tips guided me to the documentation, and i was able to take it from there. I can't see how the documentation would be lacking for you though, i find it to be clear. However, if you don't have some experience with javascript/jquery, this will not be straightforward.
I made a new tree page, based this on EMP.
When you want to do a search, you will first need the tree object, since the search function is a function of that object. I opened Firebug and ran this in my console:
jQuery.tree.focused()This is in the docs. "This functions returns the currently focused tree instance."
If you would have more trees, you could always use
jQuery.tree.reference(needle)This functions returns a specific tree instance by an ID or contained node.
Arguments:
mixed needle
This can be either the instance ID (the ID of the container node), an ID of any contained DOM element,
an actual DOM element contained within the tree, or a jQuery extended DOM node container within the tree.>
Now you have your tree object. Let's do a search. There are 2 employees with 'LL' in their names. I want to grab those.
$.tree.focused().search("LL")This'll do "nothing". Why? Take a look at the documentation:
Searches all nodes whose titles match a given string. If async is used a request is made to the server, the response should contain the comma-separated IDs of nodes that need to be opened so that all nodes that match the search string are visible.
The search string is provided in the request. The function triggers the onsearch callback, with the nodes found as a parameter.
Arguments:
string needle
The search string.
string compare_function
Optional argument. The jQuery function to be used for comparing titles to the string - defaults to "contains".>
What is of importance here is this: The function triggers the onsearch callback
+(oh, and please note that the search is looking for a match in the TITLE of the nodes!)+
So, taking a look at onsearch:
callback.onsearch Triggered after a search is performed and results are ready.
Receives two parameters - a jQuery collection of nodes matching the search and a reference to the tree instance.
*Default is: function(NODES, TREE_OBJ) { NODES.addClass("search");* }
>
So the default action of a search is something very simple: it assigns a class to the nodes which match the search criteria.
If you would want more complex things to happen, you can simply provide another function to the tree object for the onsearch callback, and that is what Mimi meant with changing it. But you don't have to if the class-adding is sufficient.
So, running from my firebug console:
$(".search").css({"background-color":"red"})Grab all elements with class 'search', and give them a red background color. My nodes are now red for "ALLEN" and "MILLER".
It also helps to use something like firebug, have knowledge of jquery, DOM and being able to inspect it, and read docs. I did not do anything special except applying some knowledge and taking my lead from those docs. Of course, Mimi mentioned this aswell, but the docs are at *\apex_images\libraries\jquery-jstree\0.9.9a2\documentation.html*
Hope that helps you forward. -
Command link used as tree node
I'm using an ADF Tree where one of my nodes is a command link. I've given the link an id="myLink".
When I run the page, the tree shows up fine with just one node.
But the View Page source does not contain any entry that says id="mylink".
Where could be the problem?
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RVHi,
I assume you use ADF Faces RC, because otherwise you would have posted this to the JDeveloper forum. If you add a command link t a node, then this command link is used for any node that is rendered for the tree (unless you implemented it in a way that only has exactly one command link component showing in the whole tree - which I don't think you have).
In JSF you cannot have more than one component with a specific ID, which means that assigning an ID to a command link in a tree doesn't make much sense.
In ADF Faces RC, trees are active components, which means they are created in the DOM and not HTML. So using a DOM inspector like Firebug you should see your tree and link components
<a id="j_id___jsp_tag_ctru4:7:myLink" class="xdk" href="#" onclick="return false;">commandLink 1</a>
Frank -
Htmlb:tree node count limitation
Hi Experts,
I have a problem with htmlb:tree. Rendering up to 60 nodes will works well, if my tree has more than 60-65 nodes and I klick any link or the tree itself, after rendering has been finished, the Browser will get stuck and keep searching forever. SAP recommends to use htmlb:tree for trees with 30-50 nodes. Some suggestion was to load the node using AJAX. Are there some other ideas?
Many thanks for help!check out this weblog
[BSP/How-To: Build performance-efficient dynamic htmlb:tree|BSP/How-To: Build performance-efficient dynamic htmlb:tree]
Raja -
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 -
Htmlb:tree differentiate between nodeclick and tree node expander click
Hi,
how can i differentiate between nodeclick and tree node expander (to get to its children) click in my event processing in htmlb:tree element.
<u><b>What i am trying to achieve?</b></u>
Onload just load root node and its immediate children.
On node expand get the children of the current node and modify htmlb:tree table2 with additional node inofs.
on node click call some client function.
But my issue is that i am not able to differentiate between node expander click and node click in my event handling. Any help on this is appreciated.
(I am not using MVC)
Thanks in advance.
Regards
Raja
Message was edited by: Durairaj Athavan RajaAfter reading your weblog I think I understand better. I did some testing with my example. I am using the toggle = "true", so that the page returns to the server each time an expander is selected.
<htmlb:tree id = "myTree1"
height = "75%"
toggle = "true"
title = "<b><otr>EQI Reporting Tree</otr></b>"
width = "90%"
onTreeClick = "myTreeClick"
table = "<%= application->selection_model->itview %>" >
</htmlb:tree>
However I have not added any coding in my event handler to respond to the expander event. I only respond to myTreeClick (which loads some data for the given selection). The BSP tree element itself must be doing the hard work for me.
if event_id cs 'tr_myTree1'.
data: tree_event type ref to cl_htmlb_event_tree.
tree_event ?= htmlb_event.
if tree_event->server_event = 'myTreeClick'.
clear appl->message1.
appl->selection_model->get_chart_data( appl = appl
node = tree_event->node ).
endif.
endif.
I pass my entire tree defintion to the element. It appears that it only sends visible nodes to be rendered. When the expander is selected, I don't have to do anything, the tree re-renders with only the newly visible rows.
I tested and turned off the toggle (toggle = "false") and my page took forever to load because it was sending all the nodes to the frontend on the first load. -
Useful Code of the Day: Hideable Tree Nodes
Someone posted about how they could selectively hide tree nodes, and I already had this AbstractTreeModel class (which does some things DefaultTreeModel does and some it doesn't) and a concrete subclass for TreeNode objects, so I was thinking how one could do hideable nodes. So I came up with this solution.
There's 4 classes here:
- AbstractTreeModel is the base for the concrete TreeNodeTreeModel
- TreeNodeTreeModel extends AbstractTreeModel to support TreeNodes (DefautlMutableTreeNode, etc.)
- HideableMutableTreeNode which is a DefautlMutableTreeNode subclass which has a visible field (with is/set methods, of course).
- HideableTreeModel is the hideable model which is a subclass of TreeNodeTreeModel.
A HideableMutableTreeNode can be set invisible directly, but the tree still needs to be notified to update. So it's best to use the methods in HideableTreeModel which set a node's visibility which notify the tree of changes accordingly. Methods are also provided to check a full path's visibility or ensure a node including all parent nodes are visible.
A HideableTreeModel can take any TreeNode class, it doesn't have to be all HideableMutableTreeNodes, but only HideableMutableTreeNodes can be made invisible, of course. Any other TreeNode type would just be considered visible.
Hiding nodes works basically by making the tree think there's less nodes then there are. And to do this, the node counts and child index search just works by looping thru the parent's children. This has potential perfomance drawbacks of course, since one has to loop thru the node's children to get nodes every time. This could be alleviated by not supporting non-hideable nodes changing the internal maintenance of HideableMutableTreeNode contents. But I'll leave that to whoever really needs it. It shouldn't be a problem if there are are a relatively small set of child nodes in any given parent.
Also, note that the root node in the model cannot be made invisible, cuz it'd be redundant since JTree can be set to hide the root node.
// *** HideableTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>HideableTreeModel</code> is an <code>TreeNodeTreeModel</code>
* implementation for <code>HideableMutableTreeNode</code> objects. The
* model can also take any other <code>javax.swing.tree.TreeNode</code>
* objects.
public class HideableTreeModel extends TreeNodeTreeModel {
* Creates a new <code>HideableTreeModel</code> object.
* @param root the root node
public HideableTreeModel(TreeNode root) {
super(root);
* Checks if the specified node is visible. A node can only be
* hidden if the node is an instance of <code>HideableMutableTreeNode</code>. <br />
* <br />
* Note that this only test the visibility of the specified node, not
* whether a parent node is visible. Use <code>isPathToNodeVisible(Object)</code>
* to check if the full path is visible.
* @param node the node
* @param true if the node is visible, else false
public boolean isNodeVisible(Object node) {
if(node != getRoot()) {
if(node instanceof HideableMutableTreeNode) {
return ((HideableMutableTreeNode)node).isVisible();
return true;
* Sets the specified node to be hidden. A node can only be made hidden
* if the node is an instance of <code>HideableMutableTreeNode</code>. <br />
* <br />
* Note that this method will notify the tree to reflect any changes to
* node visibility. <br />
* <br />
* Note that this will not alter the visibility of any nodes in the
* specified node's path to the root node. Use
* <code>ensurePathToNodeVisible(Object)</code> instead to make sure the
* full path down to that node is visible. <br />
* <br />
* Note that this method will notify the tree to reflect any changes to
* node visibility.
* @param node the node
* @param v true for visible, false for hidden
* @param true if the node's visibility could actually change, else false
public boolean setNodeVisible(Object node, boolean v) {
// can't hide root
if(node != getRoot()) {
if(node instanceof HideableMutableTreeNode) {
HideableMutableTreeNode n = (HideableMutableTreeNode)node;
// don't fix what ain't broke...
if(v != n.isVisible()) {
TreeNode parent = n.getParent();
if(v) {
// need to get index after showing...
n.setVisible(v);
int index = getIndexOfChild(parent, n);
super.nodeInserted(parent, n, index);
} else {
// need to get index before hiding...
int index = getIndexOfChild(parent, n);
n.setVisible(v);
super.nodeRemoved(parent, n, index);
return true;
return false;
* Checks if the specified node is visible and all nodes above it are
* visible.
* @param node the node
* @param true if the path is visible, else false
public boolean isPathToNodeVisible(Object node) {
Object[] path = getPathToRoot(node);
for(int i = 0; i < path.length; i++) {
if(!isNodeVisible(path)) {
return false;
return true;
* Sets the specified node and all nodes above it to be visible.
* Note that this method will notify the tree to reflect any changes to
* node visibility.
* @param node the node
public void ensurePathToNodeVisible(Object node) {
Object[] path = getPathToRoot(node);
for(int i = 0; i < path.length; i++) {
setNodeVisible(path[i], true);
* Returns the child of parent at index index in the parent's child array.
* @param parent the parent node
* @param index the index
* @return the child or null if no children
public Object getChild(Object parent, int index) {
if(parent instanceof TreeNode) {
TreeNode p = (TreeNode)parent;
for(int i = 0, j = -1; i < p.getChildCount(); i++) {
TreeNode pc = (TreeNode)p.getChildAt(i);
if(isNodeVisible(pc)) {
j++;
if(j == index) {
return pc;
return null;
* Returns the number of children of parent.
* @param parent the parent node
* @return the child count
public int getChildCount(Object parent) {
int count = 0;
if(parent instanceof TreeNode) {
TreeNode p = (TreeNode)parent;
for(int i = 0; i < p.getChildCount(); i++) {
TreeNode pc = (TreeNode)p.getChildAt(i);
if(isNodeVisible(pc)) {
count++;
return count;
* Returns the index of child in parent.
* @param parent the parent node
* @param child the child node
* @return the index of the child node in the parent
public int getIndexOfChild(Object parent, Object child) {
int index = -1;
if(parent instanceof TreeNode && child instanceof TreeNode) {
TreeNode p = (TreeNode)parent;
TreeNode c = (TreeNode)child;
if(isNodeVisible(c)) {
index = 0;
for(int i = 0; i < p.getChildCount(); i++) {
TreeNode pc = (TreeNode)p.getChildAt(i);
if(pc.equals(c)) {
return index;
if(isNodeVisible(pc)) {
index++;
return index;
* Main method for testing.
* @param args the command-line arguments
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
HideableMutableTreeNode root = new HideableMutableTreeNode("root");
root.add(new HideableMutableTreeNode("child_1"));
final HideableMutableTreeNode c2 = new HideableMutableTreeNode("child_2");
c2.setVisible(false);
final HideableMutableTreeNode c2a = new HideableMutableTreeNode("child_2_A");
c2.add(c2a);
c2.add(new HideableMutableTreeNode("child_2_B"));
root.add(c2);
HideableMutableTreeNode c3 = new HideableMutableTreeNode("child_3");
HideableMutableTreeNode cC = new HideableMutableTreeNode("child_3_C");
cC.setVisible(false);
c3.add(cC);
c3.add(new HideableMutableTreeNode("child_3_D"));
root.add(c3);
root.add(new HideableMutableTreeNode("child_4"));
root.add(new HideableMutableTreeNode("child_5"));
DefaultMutableTreeNode c6 = new DefaultMutableTreeNode("child_6");
c6.add(new DefaultMutableTreeNode("child_6_A"));
c6.add(new DefaultMutableTreeNode("child_6_B"));
root.add(c6);
final HideableTreeModel model = new HideableTreeModel(root);
JTree tree = new JTree(model);
f.getContentPane().add(new JScrollPane(tree), BorderLayout.CENTER);
JButton b = new JButton("toggle");
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
model.setNodeVisible(c2, !model.isNodeVisible(c2));
//model.ensurePathToNodeVisible(c2a);
f.getContentPane().add(b, BorderLayout.SOUTH);
f.pack();
f.setSize(300, 500);
f.show();
// *** HideableMutableTreeNode ***
import javax.swing.*;
import javax.swing.tree.*;
* <code>HideableMutableTreeNode</code> is a <code>DefaultMutableTreeNode</code>
* implementation that works with <code>HideableTreeModel</code>.
public class HideableMutableTreeNode extends DefaultMutableTreeNode {
* The node is visible flag.
public boolean visible = true;
* Creates a tree node that has no parent and no children, but which
* allows children.
public HideableMutableTreeNode() {
super();
* Creates a tree node with no parent, no children, but which allows
* children, and initializes it with the specified user object.
* @param userObject - an Object provided by the user that
* constitutes the node's data
public HideableMutableTreeNode(Object userObject) {
super(userObject);
* Creates a tree node with no parent, no children, initialized with the
* specified user object, and that allows children only if specified.
* @param userObject - an Object provided by the user that
* constitutes the node's data
* @param allowsChildren - if true, the node is allowed to have child
* nodes -- otherwise, it is always a leaf node
public HideableMutableTreeNode(Object userObject, boolean allowsChildren) {
super(userObject, allowsChildren);
* Checks if the node is visible.
* @return true if the node is visible, else false
public boolean isVisible() {
return this.visible;
* Sets if the node is visible.
* @param v true if the node is visible, else false
public void setVisible(boolean v) {
this.visible = v;
// *** TreeNodeTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>TreeNodeTreeModel</code> is an <code>AbstractTreeModel</code>
* implementation for <code>javax.swing.tree.TreeNode</code> objects.
public class TreeNodeTreeModel extends AbstractTreeModel {
* Creates a new <code>TreeNodeTreeModel</code> object.
* @param root the root node
public TreeNodeTreeModel(TreeNode root) {
super();
setRoot(root);
* Returns the parent of the child node.
* @param node the child node
* @return the parent or null if root
public Object getParent(Object node) {
if(node != getRoot() && (node instanceof TreeNode)) {
return ((TreeNode)node).getParent();
return null;
* Returns the child of parent at index index in the parent's child array.
* @param parent the parent node
* @param index the index
* @return the child or null if no children
public Object getChild(Object parent, int index) {
if(parent instanceof TreeNode) {
return ((TreeNode)parent).getChildAt(index);
return null;
* Returns the number of children of parent.
* @param parent the parent node
* @return the child count
public int getChildCount(Object parent) {
if(parent instanceof TreeNode) {
return ((TreeNode)parent).getChildCount();
return 0;
* Returns the index of child in parent.
* @param parent the parent node
* @param child the child node
* @return the index of the child node in the parent
public int getIndexOfChild(Object parent, Object child) {
if(parent instanceof TreeNode && child instanceof TreeNode) {
return ((TreeNode)parent).getIndex((TreeNode)child);
return -1;
* Returns true if node is a leaf.
* @param node the node
* @return true if the node is a leaf
public boolean isLeaf(Object node) {
if(node instanceof TreeNode) {
return ((TreeNode)node).isLeaf();
return true;
* Main method for testing.
* @param args the command-line arguments
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
root.add(new DefaultMutableTreeNode("child_1"));
DefaultMutableTreeNode c2 = new DefaultMutableTreeNode("child_2");
c2.add(new DefaultMutableTreeNode("child_2_A"));
c2.add(new DefaultMutableTreeNode("child_2_B"));
root.add(c2);
root.add(new DefaultMutableTreeNode("child_3"));
root.add(new DefaultMutableTreeNode("child_4"));
JTree tree = new JTree(new TreeNodeTreeModel(root));
f.getContentPane().add(new JScrollPane(tree));
f.pack();
f.setSize(300, 500);
f.show();
// *** AbstractTreeModel ***
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
public abstract class AbstractTreeModel implements TreeModel {
* The list of tree model listeners.
private Vector modelListeners = new Vector();
* The root object of the tree.
private Object root = null;
* Basic no-op constructor.
public AbstractTreeModel() {
* Gets the root object of the tree.
* @return the root object
public Object getRoot() {
return this.root;
* Sets the root object of the tree.
* @param r the root object
protected void setRoot(Object r) {
this.root = r;
* Gets the path to the root node for the specified object.
* @param node the root node
* @return the path to the object or <CODE>null</CODE>
public Object[] getPathToRoot(Object node) {
return getPathToRoot(node, 0);
* Gets the path to the root node for the specified object.
* @param node the root node
* @param i the current index
* @return the path to the object or <CODE>null</CODE>
private Object[] getPathToRoot(Object node, int i) {
Object anode[];
if(node == null) {
if(i == 0) {
return null;
anode = new Object[i];
} else {
i++;
if(node == getRoot()) {
anode = new Object[i];
} else {
anode = getPathToRoot(getParent(node), i);
anode[anode.length - i] = node;
return anode;
* Gets the parent object of the specified object. This method is not
* part of the <code>javax.swing.tree.TreeModel</code> interface, but is
* required to support the <code>getPathToRoot(Object)</code> method,
* which is widely used in this class. Therefore, it is important to
* correctly implement this method.
* @param obj the object
* @parma the parent object or null if no parent or invalid object
protected abstract Object getParent(Object obj);
* Adds a listener for the <CODE>TreeModelEvent</CODE> posted after the
* tree changes.
* @param l the tree model listener
public void addTreeModelListener(TreeModelListener l) {
modelListeners.addElement(l);
* Removes a listener previously added with addTreeModelListener().
* @param l the tree model listener
public void removeTreeModelListener(TreeModelListener l) {
modelListeners.removeElement(l);
* Forces the tree to reload. This is useful when many changes occur
* under the root node in the tree structure.
* <b>NOTE:</b> This will cause the tree to be collapsed. To maintain
* the expanded nodes, see the <code>getExpandedPaths(JTree)</code>
* and <code>expandPaths(JTree, ArrayList)</code> methods.
* @see #getExpandedPaths(JTree)
* @see #expandPaths(JTree, ArrayList)
public void reload() {
reload(getRoot());
* Forces the tree to repaint. This is useful when many changes occur
* under a specific node in the tree structure.
* <b>NOTE:</b> This will cause the tree to be collapsed below the
* updated node.
* @param node the node that changed
public void reload(Object node) {
if(node != null) {
TreePath tp = new TreePath(getPathToRoot(node));
fireTreeStructureChanged(new TreeModelEvent(this, tp));
* Messaged when the user has altered the value for the item identified
* by <CODE>path</CODE> to <CODE>newValue</CODE>.
* @param path the path to the changed object
* @param newValue the new value
public void valueForPathChanged(TreePath path, Object newValue) {
nodeChanged(path.getLastPathComponent());
* Notifies the tree that nodes were inserted. The index is looked up
* automatically.
* @param node the parent node
* @param child the inserted child node
public void nodeInserted(Object node, Object child) {
nodeInserted(node, child, -1);
* Notifies the tree that nodes were inserted.
* @param node the parent node
* @param child the inserted child node
* @param index the index of the child
public void nodeInserted(Object node, Object child, int index) {
if(index < 0) {
index = getIndexOfChild(node, child);
if(node != null && child != null && index >= 0) {
TreePath tp = new TreePath(getPathToRoot(node));
int[] ai = { index };
Object[] ac = { child };
fireTreeNodesInserted(new TreeModelEvent(this, tp, ai, ac));
* Notifies the tree that nodes were removed. The index is required
* since by this point, the object will no longer be in the tree.
* @param node the parent node
* @param child the removed child node
* @param index the index of the child
public void nodeRemoved(Object node, Object child, int index) {
if(node != null && child != null && index >= 0) {
TreePath tp = new TreePath(getPathToRoot(node));
int[] ai = { index };
Object[] ac = { child };
fireTreeNodesRemoved(new TreeModelEvent(this, tp, ai, ac));
* Notifies the tree that a node was changed.
* @param node the changed node
public void nodeChanged(Object node) {
if(node != null) {
TreePath tp = new TreePath(getPathToRoot(node));
fireTreeNodesChanged(new TreeModelEvent(this, tp, null, null));
* Fires "tree nodes changed" events to all listeners.
* @param event the tree model event
protected void fireTreeNodesChanged(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeNodesChanged(event);
* Fires "tree nodes inserted" events to all listeners.
* @param event the tree model event
protected void fireTreeNodesInserted(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeNodesInserted(event);
* Fires "tree nodes removed" events to all listeners.
* @param event the tree model event
protected void fireTreeNodesRemoved(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeNodesRemoved(event);
* Fires "tree structure changed" events to all listeners.
* @param event the tree model event
protected void fireTreeStructureChanged(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeStructureChanged(event);
* Records the list of currently expanded paths in the specified tree.
* This method is meant to be called before calling the
* <code>reload()</code> methods to allow the tree to store the paths.
* @param tree the tree
* @param pathlist the list of expanded paths
public ArrayList getExpandedPaths(JTree tree) {
ArrayList expandedPaths = new ArrayList();
addExpandedPaths(tree, tree.getPathForRow(0), expandedPaths);
return expandedPaths;
* Adds the expanded descendants of the specifed path in the specified
* tree to the internal expanded list.
* @param tree the tree
* @param path the path
* @param pathlist the list of expanded paths
private void addExpandedPaths(JTree tree, TreePath path, ArrayList pathlist) {
Enumeration enum = tree.getExpandedDescendants(path);
while(enum.hasMoreElements()) {
TreePath tp = (TreePath)enum.nextElement();
pathlist.add(tp);
addExpandedPaths(tree, tp, pathlist);
* Re-expands the expanded paths in the specified tree. This method is
* meant to be called before calling the <code>reload()</code> methods
* to allow the tree to store the paths.
* @param tree the tree
* @param pathlist the list of expanded paths
public void expandPaths(JTree tree, ArrayList pathlist) {
for(int i = 0; i < pathlist.size(); i++) {
tree.expandPath((TreePath)pathlist.get(i));Hey
I'm not trying to show anyone up here, but having just built a tree model for displaying an XML document in a tree, I thought this seemed like a neat exercise.
I implemented this very differently from the @OP. I only have one class, HiddenNodeTreeModel. All the hidden node data is stored in the model itself in my class. The advantage of what I've created is it will work with any TreeModel. The disadvantage is that I think it's not going to be very scalable - the additional computing to get the number of child nodes and to adjust indexes is heavy. So if you need a scalable solution definitely don't use this.
Anyway here you go
HiddenNodeTreeModel.java
======================
package tjacobs.ui.tree;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTree;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import tjacobs.ui.WindowUtilities;
public class HiddenNodeTreeModel implements TreeModel {
TreeModel mModel;
ArrayList<Object> mHidden = new ArrayList<Object>();
public HiddenNodeTreeModel (TreeModel model) {
mModel = model;
public void addTreeModelListener(TreeModelListener arg0) {
mModel.addTreeModelListener(arg0);
private ArrayList<Integer> getHiddenChildren(Object parent) {
ArrayList<Integer> spots = new ArrayList<Integer>();
Iterator _i = mHidden.iterator();
while (_i.hasNext()) {
Object hidden = _i.next();
int idx = mModel.getIndexOfChild(parent, hidden);
if (idx != -1) {
spots.add(idx);
return spots;
public Object getChild(Object arg0, int index) {
ArrayList<Integer> spots = getHiddenChildren(arg0);
Collections.sort(spots);
Iterator<Integer> _i = spots.iterator();
while (_i.hasNext()) {
int num = _i.next();
if (num <= index) {
index++;
return mModel.getChild(arg0, index);
public int getChildCount(Object arg0) {
ArrayList list = getHiddenChildren(arg0);
System.out.println("size = " + list.size());
return mModel.getChildCount(arg0) - list.size();
public int getIndexOfChild(Object arg0, Object arg1) {
int index = mModel.getIndexOfChild(arg0, arg1);
ArrayList<Integer> spots = getHiddenChildren(arg0);
Collections.sort(spots);
Iterator<Integer> _i = spots.iterator();
int toSub = 0;
while (_i.hasNext()) {
int num = _i.next();
if (num <= index) {
toSub++;
return index - toSub;
public Object getRoot() {
// TODO Auto-generated method stub
return mModel.getRoot();
public boolean isLeaf(Object arg0) {
// TODO Auto-generated method stub
return mModel.isLeaf(arg0);
public void removeTreeModelListener(TreeModelListener arg0) {
mModel.removeTreeModelListener(arg0);
public void valueForPathChanged(TreePath arg0, Object arg1) {
mModel.valueForPathChanged(arg0, arg1);
public void hideNode(Object node) {
if (node instanceof TreePath) {
node = ((TreePath)node).getLastPathComponent();
mHidden.add(node);
public void showNode(Object node) {
mHidden.remove(node);
public void showAll() {
mHidden.clear();
* @param args
public static void main(String[] args) {
// TODO Auto-generated method stub
DefaultMutableTreeNode A = new DefaultMutableTreeNode("A");
DefaultMutableTreeNode B = new DefaultMutableTreeNode("B");
DefaultMutableTreeNode C = new DefaultMutableTreeNode("C");
DefaultMutableTreeNode D = new DefaultMutableTreeNode("D");
DefaultMutableTreeNode E = new DefaultMutableTreeNode("E");
DefaultMutableTreeNode F = new DefaultMutableTreeNode("F");
A.add(B);
B.add(C);
B.add(D);
B.add(E);
E.add(F);
DefaultTreeModel model = new DefaultTreeModel(A);
final HiddenNodeTreeModel hmodel = new HiddenNodeTreeModel(model);
final JTree tree = new JTree(hmodel);
JFrame jf = new JFrame("HiddenNodeTreeModel Test");
jf.add(tree);
JMenuBar bar = new JMenuBar();
jf.setJMenuBar(bar);
JMenu menu = new JMenu("Options");
bar.add(menu);
final JMenuItem hide = new JMenuItem("Hide");
final JMenuItem show = new JMenuItem("ShowAll");
menu.add(hide);
menu.add(show);
ActionListener al = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == hide) {
hmodel.hideNode(tree.getSelectionPath());
tree.updateUI();
else {
hmodel.showAll();
tree.updateUI();
hide.addActionListener(al);
show.addActionListener(al);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setBounds(100,100,100,100);
jf.setVisible(true);
} -
How to run a form using tree node selection??
hi...
i have populated a tree with all the form name.There is a particular id for every form.i want to show a form using tree node selection.What i did...i write a trigger in button's click event when the tree node is selected then i get a id.if id=1 then open_form('test.fmx').when i want to execute this code then it is showing the same form 2 times.Can anyone help me to solve my problem?If so plz tell me what code i have to write to show a form using node selection?.I've done the same thing, and i think it works fine.
Check this code (Sorry for the long post, but i cannot find how to attach files.
PACKAGE menu_pk IS
--Initialization of the menu.
procedure Init;
--Called from WHEN-TREE-NODE-EXPANDED
procedure Expanded;
--Called from WHEN-TREE-NODE-ACTIVATED
procedure ExecuteCommand;
END;
PACKAGE BODY menu_pk IS
MENU_NAME constant varchar2(30) := 'menu.menu';
cursor c_menu(pRoot in varchar2) is
select apm_code, apm_parcode, apm_descr, decode(apm_type, 0, Ftree.EXPANDED_NODE, Ftree.LEAF_NODE) apm_type,
decode(apm_type, 0, 'menu', 1, 'form', 2, 'report') || '.ico' apm_icon
from app_menu
where apm_parcode = pRoot
order by apm_code asc;
procedure Init is
new_node ftree.node;
begin
for i in c_menu('root')
loop
new_node := Ftree.add_tree_node(MENU_NAME, FTree.ROOT_NODE,
Ftree.PARENT_OFFSET, Ftree.LAST_CHILD,
i.apm_type, i.apm_descr, i.apm_icon, i.apm_code);
end loop;
end;
procedure FillNode(pNode in FTree.Node) is
new_node ftree.node;
begin
for i in c_menu(FTree.get_tree_node_property(MENU_NAME, pNode, FTree.NODE_VALUE))
loop
new_node := Ftree.add_tree_node(MENU_NAME, pNode,
Ftree.PARENT_OFFSET, Ftree.LAST_CHILD,
i.apm_type, i.apm_descr, i.apm_icon, i.apm_code);
end loop;
end;
procedure DeleteNodeChilds is
node FTree.NODE;
begin
loop
node := FTree.Find_Tree_Node(MENU_NAME, '',
FTree.FIND_NEXT_CHILD, FTree.NODE_VALUE,
name_in('system.trigger_node'), name_in('system.trigger_node'));
exit when Ftree.ID_NULL(node);
FTree.delete_tree_node(MENU_NAME, node);
end loop;
end;
procedure Expanded is
begin
if (FTree.GET_TREE_NODE_PROPERTY(MENU_NAME, :system.trigger_node, FTree.Node_State) = FTree.EXPANDED_NODE) then
menu_pk.FillNode(name_in('system.trigger_node'));
else
menu_pk.DeleteNodeChilds;
end if;
end;
procedure ExecuteCommand is
cursor c_command(pCode in varchar2) is
select apm_form, apm_type
from app_menu
where apm_code = pCode;
fCommand c_command%rowtype;
fMenuCode varchar2(20);
begin
-- if it is as menu node then exit.
if (not FTree.Get_Tree_Node_Property(MENU_NAME, :system.trigger_node, FTree.NODE_STATE) = FTree.LEAF_NODE) then
return;
end if;
fMenuCode := FTree.Get_Tree_Node_Property(MENU_NAME, :system.trigger_node, FTree.NODE_VALUE);
open c_command(fMenuCode);
fetch c_command into fCommand;
close c_command;
if (fCommand.apm_type = 1) and (fCommand.apm_form is not null) then
globals.Set_MenuChoice(fMenuCode);
OPEN_FORM(fCommand.apm_form);--, ACTIVATE, SESSION);
end if;
end;
END;
The menu table definition follows.
create table APP_MENU
APM_CODE VARCHAR2(10) not null,
APM_PARCODE VARCHAR2(10) not null,
APM_DESCR VARCHAR2(40) not null,
APM_TYPE NUMBER(1) not null,
APM_FORM VARCHAR2(50)
alter table APP_MENU
add constraint APP_MENU_PRI primary key (APM_CODE);
Hope this helps -
Netscape using plugin doesn't display Japanese characters in a tree node
Hi,
I have a problem displaying a swing tree node name in Japanese. The problem only occurs on Netscape browsers. When I run the same applet with Internet Explorer, all the Japanese displays correctly. Now, with Netscape, the node name is displayed in little rectangle characters but the tooltip is displayed in Japanese. I don't believe I have any problem with the Java code because it works with IE.
I am using the java 1.3.1_01 plugin on a Windows NT machine that has a Japanese OS. I've also installed Japanese versions of Netscape. Also, Netscape is able to display my help files in Japanese correctly, so I am wondering if the problem is with the java plugin.
Any clues?
Many thanksFound the problem. I set a font type of Arial. It's best to set the type to MS Gothic, or dont' set it at all so the system default font is used.
-
How to fill or bind data using Value Node in Tree Node
Hi Gurus,
Can anybody help me on how to fill data or bind data using Value Node in Tree Node View. I know how to create Tree Node but not able to show value on the UI in Tree View.
Can u please let if anybody has done it?
Thanks in advance.
Madhusudancontinued...
TRY.
lv_child = me->node_factory->get_proxy(
iv_bo = lv_value_node
iv_parent_proxy = me
iv_proxy_type = 'ZL_CLASS_CN02' ).
lv_child->is_leaf = 'X'.
APPEND lv_child TO rt_children.
CATCH cx_sy_move_cast_error cx_sy_ref_is_initial.
ENDTRY.
In the above code iv_bo , lv_value_node will be the actual object of the second node or leaf node here, which will have the same structure of parent node along with data. After/before this, you would need to build table and refresh in do-prepare_output of IMPL class.In the above code iv_bo , lv_value_node will be the actual object of the second node or leaf node here, which will have the same structure of parent node along with data. After/before this, you would need to buid table and refresh in do-prepare_output of IMPL class.
ztyped_context->resultlist->build_table( ).
IF ztyped_context->resultlist->node_tab IS INITIAL.
ztyped_context->resultlist->refresh( ).
ENDIF.
Also the EH_ONEXPAND has to be implemented and event handled in DO_HANDLE_EVENT. But this expand event has to be delegated to context node directly as CL_BSP_WD_CONTEXT_NODE_TREE will already have the implementation.
ztyped_context->resultlist->expand_node( lv_event->row_key ).
Where in result list is the node ZL_CLASS_CN00.
After typing the whole content , i found this blog :). There are few things i have written more that in the blog. /people/poonam.assudani/blog/2009/06/24/create-a-tree-view-display-in-crm-web-ui
Regards,
Karthik -
Add/Edit/Delete Tree Nodes using CL_GUI_ALV_TREE
Hi All,
I am looking for an example of program with CL_GUI_ALV_TREE that have a functionality of add a tree node, edit a tree node, and delete a tree node.
I have already looked the BCALV_TREE* demo program but could not able to find a program to add/edit/delete node tree elements.
Any info on this.
Thanks
aRsHello aRs
Here is a sample report showing how to delete nodes in an ALV tree. The report was copied from BCALV_TREE_01. Search for added code:
*$ADDED: begin
*$ADDED: end[/code]
When you display the tree expand the first folder completely. When entering 'DELETE' into the command field directly the first flight date node will be deleted.
REPORT ZUS_SDN_BCALV_TREE_01_DELNODE.
based on: REPORT bcalv_tree_01.
Purpose:
~~~~~~~~
This report shows the essential steps to build up a hierarchy
using an ALV Tree Control (class CL_GUI_ALV_TREE).
Note that it is not possible to build up this hierarchy
using a simple ALV Tree Control (class CL_GUI_ALV_TREE_SIMPLE).
To check program behavior
~~~~~~~~~~~~~~~~~~~~~~~~~
Start this report. The hierarchy tree consists of nodes for each
month on top level (this level can not be build by a simple ALV Tree
because there is no field for months in our output table SFLIGHT.
Thus, you can not define this hierarchy by sorting).
Nor initial calculations neither a special layout has been applied
(the lines on the right do not show anything).
Note also that this example does not build up and change the
fieldcatalog of the output table. For this reason, all fields
of the output table are shown in the columns although the fields
CARRID and FLDATE are already placed in the tree on the left.
(Of course, this is not a good style. See BCALV_TREE_02 on how to
hide columns).
Essential steps (Search for '§')
~~~~~~~~~~~~~~~
1.Usual steps when using control technology.
1a. Define reference variables.
1b. Create ALV Tree Control and corresponding container.
2.Create Hierarchy-header
3.Create empty Tree Control
4.Create hierarchy (nodes and leaves)
4a. Select data
4b. Sort output table according to your conceived hierarchy
4c. Add data to tree
5.Send data to frontend.
6.Call dispatch to process toolbar functions
*$ADDED: begin
DATA:
gd_del_nkey TYPE lvc_nkey.
*$ADDED: end
§1a. Define reference variables
DATA: g_alv_tree TYPE REF TO cl_gui_alv_tree,
g_custom_container TYPE REF TO cl_gui_custom_container.
DATA: gt_sflight TYPE sflight OCCURS 0, "Output-Table
ok_code LIKE sy-ucomm,
save_ok LIKE sy-ucomm, "OK-Code
g_max TYPE i VALUE 255.
END-OF-SELECTION.
CALL SCREEN 100.
*& Module PBO OUTPUT
process before output
MODULE pbo OUTPUT.
SET PF-STATUS 'MAIN100'.
SET TITLEBAR 'MAINTITLE'.
IF g_alv_tree IS INITIAL.
PERFORM init_tree.
CALL METHOD cl_gui_cfw=>flush
EXCEPTIONS
cntl_system_error = 1
cntl_error = 2.
IF sy-subrc NE 0.
CALL FUNCTION 'POPUP_TO_INFORM'
EXPORTING
titel = 'Automation Queue failure'(801)
txt1 = 'Internal error:'(802)
txt2 = 'A method in the automation queue'(803)
txt3 = 'caused a failure.'(804).
ENDIF.
ENDIF.
ENDMODULE. " PBO OUTPUT
*& Module PAI INPUT
process after input
MODULE pai INPUT.
save_ok = ok_code.
CLEAR ok_code.
CASE save_ok.
WHEN 'EXIT' OR 'BACK' OR 'CANC'.
PERFORM exit_program.
*$ADDED: begin
WHEN 'DELETE'.
CALL METHOD g_alv_tree->delete_subtree
EXPORTING
i_node_key = gd_del_nkey
I_UPDATE_PARENTS_EXPANDER = SPACE
i_update_parents_folder = 'X'
EXCEPTIONS
node_key_not_in_model = 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.
CALL METHOD g_alv_tree->frontend_update.
*$ADDED: end
WHEN OTHERS.
§6. Call dispatch to process toolbar functions
CALL METHOD cl_gui_cfw=>dispatch.
ENDCASE.
CALL METHOD cl_gui_cfw=>flush.
ENDMODULE. " PAI INPUT
*& Form init_tree
text
--> p1 text
<-- p2 text
FORM init_tree.
§1b. Create ALV Tree Control and corresponding Container.
create container for alv-tree
DATA: l_tree_container_name(30) TYPE c.
l_tree_container_name = 'CCONTAINER1'.
CREATE OBJECT g_custom_container
EXPORTING
container_name = l_tree_container_name
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
create_error = 3
lifetime_error = 4
lifetime_dynpro_dynpro_link = 5.
IF sy-subrc <> 0.
MESSAGE x208(00) WITH 'ERROR'(100).
ENDIF.
create tree control
CREATE OBJECT g_alv_tree
EXPORTING
parent = g_custom_container
node_selection_mode = cl_gui_column_tree=>node_sel_mode_single
item_selection = 'X'
no_html_header = 'X'
no_toolbar = ''
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
create_error = 3
lifetime_error = 4
illegal_node_selection_mode = 5
failed = 6
illegal_column_name = 7.
IF sy-subrc <> 0.
MESSAGE x208(00) WITH 'ERROR'. "#EC NOTEXT
ENDIF.
§2. Create Hierarchy-header
The simple ALV Tree uses the text of the fields which were used
for sorting to define this header. When you use
the 'normal' ALV Tree the hierarchy is build up freely
by the programmer this is not possible, so he has to define it
himself.
DATA l_hierarchy_header TYPE treev_hhdr.
PERFORM build_hierarchy_header CHANGING l_hierarchy_header.
§3. Create empty Tree Control
IMPORTANT: Table 'gt_sflight' must be empty. Do not change this table
(even after this method call). You can change data of your table
by calling methods of CL_GUI_ALV_TREE.
Furthermore, the output table 'gt_outtab' must be global and can
only be used for one ALV Tree Control.
CALL METHOD g_alv_tree->set_table_for_first_display
EXPORTING
i_structure_name = 'SFLIGHT'
is_hierarchy_header = l_hierarchy_header
CHANGING
it_outtab = gt_sflight. "table must be empty !
§4. Create hierarchy (nodes and leaves)
PERFORM create_hierarchy.
§5. Send data to frontend.
CALL METHOD g_alv_tree->frontend_update.
wait for automatic flush at end of pbo
ENDFORM. " init_tree
*& Form build_hierarchy_header
build hierarchy-header-information
-->P_L_HIERARCHY_HEADER strucxture for hierarchy-header
FORM build_hierarchy_header CHANGING
p_hierarchy_header TYPE treev_hhdr.
p_hierarchy_header-heading = 'Month/Carrier/Date'(300).
p_hierarchy_header-tooltip = 'Flights in a month'(400).
p_hierarchy_header-width = 30.
p_hierarchy_header-width_pix = ' '.
ENDFORM. " build_hierarchy_header
*& Form exit_program
free object and leave program
FORM exit_program.
CALL METHOD g_custom_container->free.
LEAVE PROGRAM.
ENDFORM. " exit_program
*& Form create_hierarchy
text
--> p1 text
<-- p2 text
FORM create_hierarchy.
DATA: ls_sflight TYPE sflight,
lt_sflight TYPE sflight OCCURS 0,
l_yyyymm(6) TYPE c, "year and month of sflight-fldate
l_yyyymm_last(6) TYPE c,
l_carrid LIKE sflight-carrid,
l_carrid_last LIKE sflight-carrid.
DATA: l_month_key TYPE lvc_nkey,
l_carrid_key TYPE lvc_nkey,
l_last_key TYPE lvc_nkey.
§4a. Select data
SELECT * FROM sflight INTO TABLE lt_sflight UP TO g_max ROWS.
§4b. Sort output table according to your conceived hierarchy
We sort in this order:
year and month (top level nodes, yyyymm of DATS)
carrier id (next level)
day of month (leaves, dd of DATS)
SORT lt_sflight BY fldate0(6) carrid fldate6(2).
Note: The top level nodes do not correspond to a field of the
output table. Instead we use data of the table to invent another
hierarchy level above the levels that can be build by sorting.
§4c. Add data to tree
LOOP AT lt_sflight INTO ls_sflight.
Prerequesite: The table is sorted.
You add a node everytime the values of a sorted field changes.
Finally, the complete line is added as a leaf below the last
node.
l_yyyymm = ls_sflight-fldate+0(6).
l_carrid = ls_sflight-carrid.
Top level nodes:
IF l_yyyymm <> l_yyyymm_last. "on change of l_yyyymm
l_yyyymm_last = l_yyyymm.
*Providing no key means that the node is added on top level:
PERFORM add_month USING l_yyyymm
CHANGING l_month_key.
The month changed, thus, there is no predecessor carrier
CLEAR l_carrid_last.
ENDIF.
Carrier nodes:
(always inserted as child of the last month
which is identified by 'l_month_key')
IF l_carrid <> l_carrid_last. "on change of l_carrid
l_carrid_last = l_carrid.
PERFORM add_carrid_line USING ls_sflight
l_month_key
CHANGING l_carrid_key.
ENDIF.
Leaf:
(always inserted as child of the last carrier
which is identified by 'l_carrid_key')
PERFORM add_complete_line USING ls_sflight
l_carrid_key
CHANGING l_last_key.
ENDLOOP.
ENDFORM. " create_hierarchy
*& Form add_month
FORM add_month USING p_yyyymm TYPE c
p_relat_key TYPE lvc_nkey
CHANGING p_node_key TYPE lvc_nkey.
DATA: l_node_text TYPE lvc_value,
ls_sflight TYPE sflight,
l_month(15) TYPE c. "output string for month
get month name for node text
PERFORM get_month USING p_yyyymm
CHANGING l_month.
l_node_text = l_month.
add node:
ALV Tree firstly inserts this node as a leaf if you do not provide
IS_NODE_LAYOUT with field ISFOLDER set. In form 'add_carrid_line'
the leaf gets a child and thus ALV converts it to a folder
automatically.
CALL METHOD g_alv_tree->add_node
EXPORTING
i_relat_node_key = p_relat_key
i_relationship = cl_gui_column_tree=>relat_last_child
i_node_text = l_node_text
is_outtab_line = ls_sflight
IMPORTING
e_new_node_key = p_node_key.
ENDFORM. " add_month
FORM add_carrid_line USING ps_sflight TYPE sflight
p_relat_key TYPE lvc_nkey
CHANGING p_node_key TYPE lvc_nkey.
DATA: l_node_text TYPE lvc_value,
ls_sflight TYPE sflight.
add node
ALV Tree firstly inserts this node as a leaf if you do not provide
IS_NODE_LAYOUT with field ISFOLDER set. In form 'add_carrid_line'
the leaf gets a child and thus ALV converts it to a folder
automatically.
l_node_text = ps_sflight-carrid.
CALL METHOD g_alv_tree->add_node
EXPORTING
i_relat_node_key = p_relat_key
i_relationship = cl_gui_column_tree=>relat_last_child
i_node_text = l_node_text
is_outtab_line = ls_sflight
IMPORTING
e_new_node_key = p_node_key.
ENDFORM. " add_carrid_line
*& Form add_complete_line
FORM add_complete_line USING ps_sflight TYPE sflight
p_relat_key TYPE lvc_nkey
CHANGING p_node_key TYPE lvc_nkey.
DATA: l_node_text TYPE lvc_value.
WRITE ps_sflight-fldate TO l_node_text MM/DD/YYYY.
add leaf:
ALV Tree firstly inserts this node as a leaf if you do not provide
IS_NODE_LAYOUT with field ISFOLDER set.
Since these nodes will never get children they stay leaves
(as intended).
CALL METHOD g_alv_tree->add_node
EXPORTING
i_relat_node_key = p_relat_key
i_relationship = cl_gui_column_tree=>relat_last_child
is_outtab_line = ps_sflight
i_node_text = l_node_text
IMPORTING
e_new_node_key = p_node_key.
*$ADDED: begin
IF ( ps_sflight-fldate = '20040522' ). " first flight date
IF ( gd_del_nkey IS INITIAL ). " collect only first date
gd_del_nkey = p_node_key.
ENDIF.
ENDIF.
*$ADDED: end
ENDFORM. " add_complete_line
*& Form GET_MONTH
text
-->P_P_YYYYMM text
<--P_L_MONTH text
FORM get_month USING p_yyyymm
CHANGING p_month.
Returns the name of month according to the digits in p_yyyymm
DATA: l_monthdigits(2) TYPE c.
l_monthdigits = p_yyyymm+4(2).
CASE l_monthdigits.
WHEN '01'.
p_month = 'January'(701).
WHEN '02'.
p_month = 'February'(702).
WHEN '03'.
p_month = 'March'(703).
WHEN '04'.
p_month = 'April'(704).
WHEN '05'.
p_month = 'May'(705).
WHEN '06'.
p_month = 'June'(706).
WHEN '07'.
p_month = 'July'(707).
WHEN '08'.
p_month = 'August'(708).
WHEN '09'.
p_month = 'September'(709).
WHEN '10'.
p_month = 'October'(710).
WHEN '11'.
p_month = 'November'(711).
WHEN '12'.
p_month = 'December'(712).
ENDCASE.
CONCATENATE p_yyyymm+0(4) '->' p_month INTO p_month.
ENDFORM. " GET_MONTH
/code
Regards
Uwe
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