ADF 10.1.3.0.4: tree leaf with no child nodes still displays folder icon?

I was reading through Frank Nimphius's Blog and found the entry entitled "ADF Faces: Building a hierarchical tree from recursive tables - October 05, 2006" and found a tree example in which a tree leaf with no child nodes do not display the folder icon.
I've followed the instructions listed with adf:tree, CoreTree and ChildPropertyTreeModel, but my tree leaves with no child nodes still displays the folder icon.
How do I remove this icon when the node is a leaf with no children?
Thanks,
--Todd

I figured it out.
I used the ChildPropertyTreeModel.isContainer() method.
--Todd

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af:tree leaf nodes

Is there a way to display leaf nodes in an <af:tree> differently, so that they don't look like they can be expanded?
I'm using an <af:tree> component with an ADF tree binding. There's just one source collection, with a self-join (that is, the single accessor rule returns different elements from that collection).
The problem is that every node in the tree is expandable, including the leaf nodes (that is, the ones with no children). When the user expands them, nothing happens except a change in the icon (as you might expect), but I'd rather not provide the icon at all, or provide a different icon, to discourage expansion.
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Mmm...sorta. Here's what I've done so far.
I've created a class, let's call it CustomTreeModel, that extends the (abstract) class TreeModel. I've given it a private field:
private final TreeModel mTree;and a constructor:
public CustomTreeModel(TreeModel tree) {
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}Then, I've overridden every method but one in TreeModel to delegate to mTree. For example:
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2) In the bean class, added a TreeModel field, treeModelWrapper.
3) Changed the getter for treeModelWrapper so it looked like this (this is inexact, I don't have access to my code right now).
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There are two problems with it. A little one and a big one.
Little: It degrades performance significantly. Not surprising, since I assume isContainerEmpty() is a more resource-intensive method than isContainer(), and we're calling it a lot more often now. There's probably no way around this.
Big: The data seems...a bit messed up. Most of it looks right, but I'm getting weird occasional spurious child nodes (meaning that occasionally a copy of a node is showing up in a container where it doesn't belong). Since the tree is based on a self-referential relationship, that occasionally leads to infinite loops (node A and node B show up inside one another, so you can just keep expanding downwards for ever). I can't for the life of me figure out why this is.

How do I create multiple types of child nodes in ADF Faces Tree Component

Hi,
I am trying to construct a tree using ADF Faces. The tree I am trying to develop should look something like:
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+ Dept 10
+ Dept 20
+ Dept 30
+ Dept 40
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+ALLEN
+ BLAKE
The nodes shown at the top level should serve as labels, indicating the various types of nodes available.
I have created the top level RootLabelsViewObj, with a SQL clause:
select rn, node_label
from (
select 1 rn
, 'Employees' node_label
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union all
select 2 rn
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from dual
union all
select 3 rn
, 'Bonusplans' node_label
from dual
I have created ViewLinks between the RootLabelsViewObj and the DeptView and EmpView respectively (created on top of DEPT and EMP table in SCOTT schema), based on the LABEL attribute in the RootLabelsViewObj and with ViewLink SQL specified like:
:Bind_NodeLabel = 'Departments' for the link with DeptView and :Bind_NodeLabel = 'Employees' for the link with EmpView.
In the ADF BC Application Module Tester, I get exactly what I want.
However, when I create a JSF JSPX page and drag the RootLabelsViewObj from the Data Control Panel to the page as ADF Tree, I run into a little issue: it seems like I cannot create a second Branch Accessor rule for the RootLabelsViewObj1: I have created a first Branch Accessor Rule referring to DeptView and now try to create a second one for EmpView, to allow Employees to be displayed under the root label "Employees" - but I cannot.
The PageDefinition looks like:
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<AttrNames>
<Item Value="Rn"/>
<Item Value="NodeLabel"/>
</AttrNames>
<nodeDefinition DefName="model.RootLabelsViewObj"
id="RootLabelsViewObjNode">
<AttrNames>
<Item Value="NodeLabel"/>
</AttrNames>
<Accessors>
<Item Value="DeptView"/>
</Accessors>
</nodeDefinition>
<nodeDefinition DefName="model.EmpView" id="EmpViewNode">
<AttrNames>
<Item Value="Ename"/>
</AttrNames>
</nodeDefinition>
<nodeDefinition DefName="model.DeptView" id="DeptViewNode">
<AttrNames>
<Item Value="Deptno"/>
</AttrNames>
</nodeDefinition>
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Does anyone know:
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- if so, how this can be achieved?
Right now it looks like I am limited to each node in the tree having only one type of child node.
Please tell me I am wrong.
best regards,
Lucas

Give this a shot mate
event.getNativeEventTarget();That will allow you to access the DOM object directly
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ADF: Tree Refresh after Expanding a node. Please Frank have a look!

About this post:
Re: ADF: Tree Refresh after Expanding a node
Frank answered that he doesn't notice that behavior. I found out that this happens if an appication uses a custom skin.
In SRDemoSampleADFBC, SRManage.jspx (Management from menu), if you make the explorer window small enough not to cover the whole tree, you can notice this (the page jumps to the top).
Now if you change in adf-faces-config.xml the "skin-family" tag to "oracle", you will see that the tree component has changed (it has no triangle icons why this happens) and the page doesn't refresh.
Minas

It seems that there's more to the tree expansion icon than the skin definition. We're using the minimal skin and ADF puts out a special character to represent the disclosure symbol (which by the way, renders differently on IE6, than IE7, than Safari or Firefox on Mac). However, switching to the Oracle skin, the disclosure symbol comes out as a full-on image (triangle including the +). We have found this frustrating because the triangles seem not sufficiently suggestive to our users - but switching to the Oracle skin has other issues with white-on-white text.
But in any case, the tree refresh after node expansion is another annoyance as I described in the other thread linked here (including URL to see problem in action).
Cheers, Mark

Programatically creating ADF Tree with nodes,child nodes & links?

Hi,
Currently I am using Build JDEVADF_11.1.1.3.PS2_GENERIC_100408.2356.5660. Please provide me detailed code for programatically creating ADF Tree with nodes, child nodes and links in it.
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Vik

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The most important part is the getModel methode. There you need to specify an Object and the name of the getter that will return a List of the children.
Hope this helps.
Edited by: Yannick Ongena on Feb 22, 2011 7:30 AM

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Could you please guide me ??
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Thanks pm. I finally got it to work. Apparently the functions implemented when using ITreeDataDescriptor don't always make sense. To get something to be seen as a leaf and not a branch. item.isBranch can't be the only to show false. The item.getChildren call must also return a null ICollectionView or something crazy like that , otherwise , your leaves will have disclosure symbols beside them.

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Hi !
With the following code, it seems impossible to drag leaf
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The only thing possible is to drop it as a child of "Spain"
or as a new and last root leaf.
This does not seem to be normal as you could drop "rio"
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Thanks !
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Not without changing the source code, which only Apple have access to.
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Thanks for the reply Frank.
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hello community,
sorry for stupid thread title, but I can't find the right description for what I want to do atm :)
I'm trying to create a tree from a self referencing table, but in addition I have to display childs with data from an aditional table (with reference to self referencing table). I'm using the latest JDeveloper (11.1.1.2.0) with internal WebLogic.
To create a "not so fictive" scenario: HR.EMPLOYEES + (new) table PROJECTS (project_id, employee_id, project_name) - I want to create a tree of all employees starting with King and in addition display the assigned projects for each employee.
It works fine without the PROJECTS table - self referencing just works as intended:
I did this by creating a "root" viewobject on EmployeesEO ("where EmployeesEO.MANAGER_ID is null"), one "standard" viewobject on EmployeesEO (EmployeesEOView) and one viewlink on EmployeesEOView linking to itself (0..1:* EmployeeId - ManagerId):
some screenshots:
[the datamodel|http://img405.imageshack.us/img405/9931/selfrefworksdatamodel.png]
[the binding rules|http://img525.imageshack.us/img525/6606/selfrefworksbinding.png]
[the browser output|http://img6.imageshack.us/img6/2906/selfrefworksbrowser.png]
Next, I created another (standard) viewobject on my (new) table "projects" and then created a new viewlink on EmployeesEOView (source) linking to my new AspProjectsEOView (destination) with cardinality 0..1:* EmployeeId - EmployeeId.
After this, I added the new created viewlink to the data model of the application module and bound the new data control to the page again (as best as I could figure out the bindings).
The result is kinda strange, I guess because ADF wants (but can't) figure out wich one to display. Well it should not display one of them, but both.
again, some screenshots:
[the datamodel|http://img297.imageshack.us/img297/6721/selfrefnotokdatamodel.png]
[the binding rules|http://img263.imageshack.us/img263/6820/selfrefnotokbinding.png]
[the browser output|http://img263.imageshack.us/img263/1720/selfrefnotokbrowser.png]
Well you may ask yourself what's my desired result: All stays the same (in this example) but the last "manager" looks like this (in expanded mode)
201 Michael Hartstein 100
____> 202 Pat Fray 201
____> Project 1
Any employee without projects should appear in the usual way (not to be filtered out), the projects should just be added.
My question is: is this even possible? If yes, how? If not, is there a way to "adjust" the output text of the "subviews" (this could be a "low tech" version - subelements named "Employees" and "Projects" instead of "EmployeesEOView" and "AspProjectsEOView")
Thanks alot in advance for any hint!
Edited by: asp_jko on 18.12.2009 17:46

any help? please! :)

ADF 10.1.3.0.4: tree leaf with no child nodes still displays folder icon?

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