Nodes in the R-tree

Hello,
I have a question concerning a R-tree Index:
If I create a R-tree Index with:
CREATE INDEX test ON tablename (geom)
INDEXTYPE IS MDSYS.SPATIAL_INDEX;
at which position can I decide, how many entries
a node could have?
The more entries a Tree has, the smaller is the height
and the performance is better.
Isn�t it true?
Thanks for helping

Hi,
The number of entries for each node is determined at index create time by the R-tree indexing code. The number of entries is a function of:
dimensionality of index
geodetic/non-geodetic
tablespace block size
etc.
It is not necessarily the case that more entries from a single node is better (or why have a tree structure at all?).
Hope this helps.

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How to make the leaf node of the APEX tree downloadable

Hi All,
I am trying to build a "library" page for my application, with the documents as the leaf nodes of the tree. The documents come from a database table, and each document is a BLOB.
My question is, how should I write the "link" part of the APEX tree query to make the lead node document downloadable for the end users?
Thanks,
Christine

Hilary helped me out of this by creating a new form page with two new items there corresponding to the PK and BLOB column, then in the tree query use apex_util.get_blob_file_src function as the link. Below is the email from Hilary:
1. Created Form, page 13, based upon your table storing the documents as BLOBs. The form page has just two associated items: P13_DOC and P13_DOC_ID. The item P13_DOC is of type FILE and contains a source type of DB column, which is the first required parameters of the function get_blob_file_src. NOTE: I could have created a form region on the same page as your tree, but chose to generate a separate page. You may choose to change this yourself.
2. Updated the Tree query on pg 12 to use the following link for tree nodes of level 4:
apex_util.get_blob_file_src('P13_DOC',v.attr3)
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Hi all,
I'm developing an application where I need to load and expand a tree upon some action in another view.
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Frank

Tree is a particular structure, you need to realize a recursive function, specially if the tree with is a recursive TreeNode.
this is a quickly answer, i did this in java.
The idea is the same everywhere, this is an ABAP-LIKE solution, understand and translate in a good ABAP source.
FUNCTION FindNode(TypeNode tree_node, TypeNode node_to_find ).
IF ( tree_node.ELEMENT_ID EQ node_to_find.ELEMENT_ID ).
"""""""    do what you wanna do """""
ELSE.
n = tree_node.GET_NUMBERS_OF_CHILDS;
""""""""" RECURSION
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ENDFUNCTION.

Integration B. Repository. Authorizations to see SWC nodes in the IR tree

Hi experts,
I have read this Michal Krawczyk blog in order to make authorization for determinates objects in IR /people/michal.krawczyk2/blog/2005/05/25/xi-how-to-add-authorizations-to-repository-objects
I like to know if its possible to do any authorization for the determinates users can only see determinates SCW and this objects in the integration builder repository tree (and the integration builder directory tree). For example, SAP XI has 10 SWC imported in IR, and X user only must to see 3 SWC in IR tree.
Regards.

AFAIK, not for pi 7.0, only 7.1.
Regards,
Henrique.

Exchaging Nodes in the Scene Tree

Hi,
I use a web page like structure for my application. This means, I have a tabbed navigation on the top. When I press on a tab the whole content must be replaced inside the tabbed panel. So anywhere in my action handler I make something like this:
group.content = [ ... new content ... ]
This refills the content. Unfortunately this results in "on the fly layouting". In other words, at the beginning everything is displayed at the top-left while somehow "reloading" the new content. During this the layouting is done. It looks like an HTML page which iteratively calculates the positions of the elements. How can I avoid this?
Edited by: kudi on Feb 25, 2009 1:58 AM

Well, your content is certainly dynamic since you are replacing the group.content with new content. The term 'layout' in JavaFX could mean a lot of things. Nodes are positioned with dimensions in the scene graph and can also be transformed (or vbox/hbox layout). Everybody wants something specific from their idea of 'layout'. Some examples might be to handle different screen resolutions or dynamically handle unknown child node sizes, some want 3D it goes on and on.... If you are talking about not having to dynamically recreate the group.content everytime... then maybe you want to move the node "toBack" or "toFront" on the scene graph (effectivly switching between nodes as if they were 'layers' atop of each other) - something I am yet to test!
Whatever the case, this probably requires more information about what you want to achieve. Hope this helps....

Moving a node unformates the XML File

Hi,
when I move a node in the XMl tree, I got some text format problems. I move the node like this:
if(children.item(j).getNodeName().equals("UML:Flow")) {
target = children.item(j).getParentNode().getParentNode();
target.appendChild(children.item(j));
}                    in the XML is an empty line for each moved node and the moved nodes are all in one line without linebreak like this:
befor moving:
<UML:ActivityGraph>
   <UML:Namespace.ownedElement>
        <UML:Flow xmi.id = 'G.0'/>
        <UML:Flow xmi.id = 'G.1'/>
        <UML:Flow xmi.id = 'G.3'/>
   </UML:Namespace.ownedElement>
</UML:ActivityGraph>after moving:
<UML:ActivityGraph>
   <UML:Namespace.ownedElement>
   </UML:Namespace.ownedElement>
   <UML:Flow xmi.id = 'G.0'/><UML:Flow xmi.id = 'G.1'/><UML:Flow xmi.id = 'G.3'/></UML:ActivityGraph>I want to have something like this:
<UML:ActivityGraph>
   <UML:Namespace.ownedElement>
   </UML:Namespace.ownedElement>
   <UML:Flow xmi.id = 'G.0'/>
   <UML:Flow xmi.id = 'G.1'/>
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DrClap gave an excellent advice here. Still, I'm not quite sure how to do it. My approach that goes like this
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               if (node instanceof TextNode)
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Anyway. Could you suggest a more promising approach to disburden my XML-file of the whitespaces the op mentioned?
Thanks a lot in advance,
BUG

How to edit the node value of a tree in webdynpro java

Hi ALL
I have Tree UI element where i got displayed all the nodes by calling the BAPI
Now my requirement is when i put the cursor at any node in the Tree struture then on click of insert button i need to insert the new node with the text , the user has to be option to give new text for the new node dynamically , so while adding the new node in a tree the tree has to choose the text for new node , like how to edit the node of a tree to add new text.
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is it possible the same requirement in tree UI element in webdynpro for Java??
Thanks
kallki reddy

Hi kallki reddy
In general I think this is not possible in the form you'd like. It seems the Tree control is read-only thing always. It cannot provide editing capabilities.
Table is different thing. You can select within many different cell editors including Input Fields.
I guess that you scenario could be implemented not with Tree control, but with Table with Master Column. The master column allows to bring up a hierarchy into a plain table. So it's just a tree inside a table.
Here you can find further details: [TreeByNestingTableColumn API|http://help.sap.com/saphelp_nw70ehp1/helpdata/en/92/12a74046033913e10000000a155106/content.htm]
BR, Siarhei

How to get the current tree element (node/childnode/childnode/...) ?

Hello!
I'm trying to create a kind of a navigation tree for my application.
It should represent some elements of an XML structure and some other nodes for other options.
The binding with the context is not a problem, I can create the tree up to all the levels I want to.
The problem now is, that I don't know, how to get the "current tree element", when there is any action.
For example:
public void onActionSelect(...) {
String test = wdContext.currentTreeNodeElement().getText();
wdThis.wdGetContext().currentContextElement().setSelectedElement(test);
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String test = wdContext.currentTreeNodeElement().currentChildElement.getText();
..and for the next levels so on.
Isn't there any general method to get the information of the selected element without knowing before, whether it is a nodeElement or a nodeElement.currentChildElement or a nodeElement.currentChildElement.currentChildElement, ...?
Greetings,
Ramó

Hi,
if you following that pdf ,
i think your not implemented the below code in DomodifyView method
if (firstTime) {
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Parameter "path" is of type string and contains the string representation of the tree element (its corresponding context element to be exact)
that raised the onAction event. Parameter "selectedElement" is of type IWDNodeElement (or extends it) and is defined as parameter in the event handler
that handles the onAction. The parameter mapping defined here translates the String "path" into the corresponding context element that then can
be accessed within the event handler
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      /* The following line is necessary to create parameter mapping from parameter "path" to parameter "element".
Parameter "path" is of type string and contains the string representation of the tree element (its corresponding context element to be exact)
that raised the onLoadChildren event. Parameter "element" is of type IWDNodeElement (or extends it) and is defined as parameter in the event handler
that handles the onLoadChildren. The parameter mapping defined here translates the String "path" into the corresponding context element that then can
be accessed within the event handler
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please cross check once.
Thanks,
Ramesh

How to create a new tree node with the initial edit function

Hi all,
I would like to mimic the Windows system when the user creates a new node. The newly created node should be in the edit mode, i.e.it should
be highlighted and the cursor should be appear at the end of
the newly created node name.
I have the folloing code after I create the new node and set its selection:
TreePath selectionPath = getTree().getSelectionPath();
tree.startEditingAtPath(selectionPath);
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I hope someone can help.
Kanita

I haven't tried myself but my guess is that you need to customize your tree cell editor for putting
cursor at specific position, etc.

Displaying the entire text of a tree node when the tree isn�t wide enough

Hi,
I have a JTree displayed in a JScrollPane, so there is a chance that some of the tree data may be hidden if the tree's width is insufficient, so when the user moves the cursor over a tree node whose text is not completely visible (cut off by the right edge of the scroll pane and/or window), a tooltip is displayed to show the entire node text. So far so good!
If the user double click a node in the tree a new window is supposed to be opened. This works fine if the tooltip hasn�t been displayed jet, but if it has then the user has to click 3 times to open the window.
The first time to remove the tooltip and the next 2 opens the window.
How can I awoid this?
Thanks!!!!
:-)Lisa

Any ideas, please?

How to hide a tree node from the GUI but still keep it in the tree model?

Hi, All
I used a JTree in my project in which I have a DefaultTreeModel to store all the tree structure and a JTree show it on the screen. But for some reason, I want to hide some of the nodes from the user, but I don't want to remove them from the tree model because later on I still need to use them.
I searched on the web, some people suggested method to hide the root node, but that's not appliable to my project because I want to hide some non-root nodes; Some people also suggested to collapse the parent node when there are child to hide, it is not appliable to me either, because there still some other childnodes (sibling of the node to hide) I want to show.
How can I hide some of the tree node from the user? Thanks for any information.
Linda

Here's an example using a derivation of DefaultTreeModel that shows (or does not show) two types of Sneech (appologies to the good Dr Zeus) by overiding two methods on the model.
Now, there are many things wrong with this example (using instanceof, for example), but it's pretty tight and shows one way of doing what you want.
Note: to make it useful, you''d have to change the implementation of setShowStarBelliedSneeches() to do something more sophisticated than simply firing a structure change event on the root node. You'd want to find all the star bellied sneech nodes and call fireTreeNodesRemoved(). That way the tree would stay expanded rather than collapse as it does now.
import javax.swing.JTree;
import javax.swing.JScrollPane;
import javax.swing.JOptionPane;
import javax.swing.JCheckBox;
import javax.swing.JPanel;
import javax.swing.tree.TreePath;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.DefaultMutableTreeNode;
import java.awt.Dimension;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;
class FilteredTree
     private class PlainBelliedSneech {
          public String toString() { return "Plain Bellied Sneech"; }
     private class StarBelliedSneech {
          public String toString() { return "Star Bellied Sneech"; }
     private class FilteredTreeModel
          extends DefaultTreeModel
          private boolean mShowStarBelliedSneeches= true;
          private DefaultMutableTreeNode mRoot;
          FilteredTreeModel(DefaultMutableTreeNode root)
               super(root);
               mRoot= root;
          public Object getChild(Object parent, int index)
               DefaultMutableTreeNode node=
                    (DefaultMutableTreeNode) parent;
               if (mShowStarBelliedSneeches)
                    return node.getChildAt(index);
               int pos= 0;
               for (int i= 0, cnt= 0; i< node.getChildCount(); i++) {
                    if (((DefaultMutableTreeNode) node.getChildAt(i)).getUserObject()
                                        instanceof PlainBelliedSneech)
                         if (cnt++ == index) {
                              pos= i;
                              break;
               return node.getChildAt(pos);
          public int getChildCount(Object parent)
               DefaultMutableTreeNode node=
                    (DefaultMutableTreeNode) parent;
               if (mShowStarBelliedSneeches)
                    return node.getChildCount();
               int childCount= 0;
               Enumeration children= node.children();
               while (children.hasMoreElements()) {
                    if (((DefaultMutableTreeNode) children.nextElement()).getUserObject()
                                        instanceof PlainBelliedSneech)
                         childCount++;
               return childCount;
          public boolean getShowStarBelliedSneeches() {
               return mShowStarBelliedSneeches;
          public void setShowStarBelliedSneeches(boolean showStarBelliedSneeches)
               if (showStarBelliedSneeches != mShowStarBelliedSneeches) {
                    mShowStarBelliedSneeches= showStarBelliedSneeches;
                    Object[] path= { mRoot };
                    int[] childIndices= new int[root.getChildCount()];
                    Object[] children= new Object[root.getChildCount()];
                    for (int i= 0; i< root.getChildCount(); i++) {
                         childIndices= i;
                         children[i]= root.getChildAt(i);
                    fireTreeStructureChanged(this, path, childIndices, children);
     private FilteredTree()
          final DefaultMutableTreeNode root= new DefaultMutableTreeNode("Root");
          DefaultMutableTreeNode parent;
          DefaultMutableTreeNode child;
          for (int i= 0; i< 2; i++) {
               parent= new DefaultMutableTreeNode(new PlainBelliedSneech());
               root.add(parent);
               for (int j= 0; j< 2; j++) {
                    child= new DefaultMutableTreeNode(new StarBelliedSneech());
                    parent.add(child);
                    for (int k= 0; k< 2; k++)
                         child.add(new DefaultMutableTreeNode(new PlainBelliedSneech()));
               for (int j= 0; j< 2; j++)
                    parent.add(new DefaultMutableTreeNode(new PlainBelliedSneech()));
               parent= new DefaultMutableTreeNode(new StarBelliedSneech());
               root.add(parent);
               for (int j= 0; j< 2; j++) {
                    child= new DefaultMutableTreeNode(new PlainBelliedSneech());
                    parent.add(child);
                    for (int k= 0; k< 2; k++)
                         child.add(new DefaultMutableTreeNode(new StarBelliedSneech()));
               for (int j= 0; j< 2; j++)
                    parent.add(new DefaultMutableTreeNode(new StarBelliedSneech()));
          final FilteredTreeModel model= new FilteredTreeModel(root);
          JTree tree= new JTree(model);
tree.setShowsRootHandles(true);
tree.putClientProperty("JTree.lineStyle", "Angled");
          tree.setRootVisible(false);
          JScrollPane sp= new JScrollPane(tree);
          sp.setPreferredSize(new Dimension(200,400));
          final JCheckBox check= new JCheckBox("Show Star Bellied Sneeches");
          check.setSelected(model.getShowStarBelliedSneeches());
          check.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    model.setShowStarBelliedSneeches(check.isSelected());
          JPanel panel= new JPanel(new BorderLayout());
          panel.add(check, BorderLayout.NORTH);
          panel.add(sp, BorderLayout.CENTER);
          JOptionPane.showOptionDialog(
               null, panel, "Sneeches on Beeches",
               JOptionPane.DEFAULT_OPTION,
               JOptionPane.PLAIN_MESSAGE,
               null, new String[0], null
          System.exit(0);
     public static void main(String[] argv) {
          new FilteredTree();

Read the name of a parent node of a (static) Tree UI in WebDynPro Abap

hi Experts,
I have a tree control UI that has two levels of nodes from the Root node. Year & Month. Inside the Month Node there is always only one leaf that is called Current Schedule. User clicks on Current Schedule to view the Current Schedule. This could be any month's Current Schedule of the User's choice.
Thus, I need to know which month's current schedule is chosen by the user. My tree UI is an adaptation from WDT_TREE example from Std SAP example programs. For the chosen month to be known, I have to go up in the context node hierarchy by one level? (something like, get_parent of) from the current leaf. I am not sure how would i do it. Any pointers would be greatly helpful. I tried to pick up ideas from couple of tutorials and bunch of forum posts but I did not get anywhere.
The key to my requirement is just going up one level in the tree and get to know the 'name' of that node. That will tell me the Month of the User's choice.
Thanks in advance for your helpful answers/pointers

Thanks Bala Duvvuri,
Could you please elaborate a bit more on your tip. I am a fledgling OO abapper not 'really' knowing as much OO as I should ..!!
By the way,I found out, I could apply the same OnAction method in the WDT_TREE example shown at the final leaf level to the node level as well to read the text of Month Node. It worked out and it meets my purpose with a rider..!
In order to get this Month node text for the selected 'Current Schedule' leaf, User have to click on the Month Node that opens the Current Schedule Leaf. If they clicked on the triangle beside the node, it still opens the Month Node to reveal the Current Schedule leaf, but the Month name wont be captured until User expressly clicked on Month Node first or the Folder Icon associated with it..!!
In other words, User cannot click on the left side triangle; if they did to reach the Current Schdule, the program wont work properly. This is no good, though i could talk my way through with the User to accept this. But technically i know it is possible to know the month name from a given Current Schedule leaf in the tree,though dont know how ..!!
Your bit more detailed reply would help me implement the more elegant solution than pushing the user to accept what i did.
As I await your reply i shall try to pick up from your tip.
In the meanwhile my tree has grown ..!! to have two more nodes, in which the contents need to be dynamically populated. Guess I am in for a long haul with the Tree UI
Looking to hear more. Thanks heaps again.

FINDING THE LARGEST NODE IN A BINARY TREE

can anybody help me with a recursive function to find the LARGEST NODE IN A BINARY TREE if you are given the following specs. PLEASE NOTE THAT IT'S A BINARY TREE NOT A SEARCH TREE.
Public class Node {
Node left;
Node right;
int val;
int Largest(Node r){
}

Naah, just studying and thinking it's an interesting
task Well, I diagree.
since each time the recursive function is
called, variables you hve in the method will be over
written with the new recursive call.So what? For variables that are valid inside the scope of the method: that's how it supposed to be. Vor variables with a larger scope: hand them over as an additional argument.

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,
--Todd

try 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;

Highlight the selected Tree Node

Hello Everyone,
Can someone plz tell me how to highlight the selected tree node ?
After selection, user should be able to see which node was last selected.
Thanks

Hello,
for me it is not really clear what you have done. Sorry!
Because I have problems to paste code, I will describe how you can test that function.
Take the BSP application HTMLB_SAMPLES and copy it to ZHTMLB_SAMPLES. Take page "treeviewSample.htm" and add the following node behind node22:
<htmlb:treeNode id   = "node23"
                  text = "Node 2.2, normal text"
                  selection="PRIMARYSELECTION">
Perhaps this will show you how it works and help you.
As far as I can see the attribute "selection" can't be set via table.
Best regads
Renald
Edited by: Renald Wittwer on Jan 21, 2010 1:36 PM

Nodes in the R-tree

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