Re: Using Dojo with Trinidad

Mon, 09 Oct 2006 18:23:50 -0700

I think Adam meant, that TreeTable doesn't load all the data to the client, but instead fetches the required -fully initialized- data from the backing TreeModel, when a node is expanded. To lazy load parts of the TreeModel, you'll have to add (e.g.) proxy objects to the TreeModel that fetch the data when required or subclass TreeModel to add lazy loading capabilities... Is it possible to use a ResultSet with TreeModel, too? Then this would be a possibility, too.. 

-clem

Naresh Bhatia wrote:

Well, by "lazy loading" I mean that the entire tree should not be
fetched from the service layer (or the data access layer) in one shot.
Instead, only immediate child nodes should be fetched when a node is
expanded. I think that's what you mean too, but I just wanted to be
clear about it.

Having said that, I did not readily see how lazy loading would work in
TreeTable documentation. Here's my JSP code:

<tr:treeTable var="node" value="#{treeTableBean.treeModel}"
rowDisclosureListener="#{treeTableBean.processRowDisclosureEvent}" 
        rendered="true"
        rowsByDepth="20"
        summary="Company">
    ....
</tr:treeTable>

Here's my TreeTableBean:

public class TreeTableBean {
    private TreeModel treeModel = null;

    public TreeModel getTreeModel() {
        if (treeModel == null) {
            // Get the entire tree from the service layer
            TreeNodeVO root = getTreeService().getTree("Company");
            treeModel = new ChildPropertyTreeModel(root, "children");
        }

        return treeModel;
    }
    ...
}

If getTreeModel() would just return a partial tree, I don't know how
TreeTable will ask for more nodes. The only interface I see in
<tr:treeTable> to fetch the tree is the value attribute, which in my
case is poining to a TreeModel. Given my current understanding, please
let me know how I could lazy load the tree.

Naresh

-----Original Message-----
From: Adam Winer [mailto:[EMAIL PROTECTED] Sent: Monday, October 09, 2006 12:43 PM 
To: [email protected]
Subject: Re: RE: Using Dojo with Trinidad

What do you mean by "does not do lazy loading"?  TreeTable
definitely doesn't load all the data of the tree up front.

-- Adam


On 10/7/06, Naresh Bhatia <[EMAIL PROTECTED]> wrote:

BTW, forgot to answer your other question. Yes, I do plan to create a
custom component in Dojo. (Specifically a TreeTable component - I know
there is one in Trinidad, but as far as I can tell it does not do lazy
loading and couple other requirements I have.)

Naresh

-----Original Message-----
From: Naresh Bhatia [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 07, 2006 6:28 PM
To: [email protected]
Subject: RE: Using Dojo with Trinidad

jMaki is on my TODO list to review. A cursory look suggests that it

will

work with JSF (https://ajax.dev.java.net/usingFaces.html), but there

is

no mention of ADF Faces or Trinidad. My question is specific to
Trinidad, because Trinidad seems to take over some of the events like
"onLoad" etc. thus potentially encroaching the Dojo turf. I am already
having several problems integrating Dojo with with Trinidad raw (see
some of my other posts today) - without using any frameworks, so I

want

to be extra careful bringing other variables in. One thought that did
cross my mind is to NOT use Trinidad on pages where I want to use

Dojo.

Anyway I am waiting on the experts in this group to enlighten me :-).

Naresh

-----Original Message-----
From: Clemens Schneider [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 07, 2006 5:02 PM
To: [email protected]
Subject: Re: Using Dojo with Trinidad

Did you have a look at JMaki? Or are you searching for infos for

custom

component development?

-clem

Naresh Bhatia wrote:

Does anyone have any pointers or samples for using Dojo with

Trinidad?


Thanks

Naresh

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