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From "Adam Winer" <awi...@gmail.com>
Subject Re: Re: Using Dojo with Trinidad
Date Tue, 10 Oct 2006 02:51:50 GMT
The TreeTable only invokes the TreeModel as needed
for data.

ChildPropertyTreeModel is just one implementation - if
you need to load it dynamically, then a custom
implementation of TreeModel is needed - either
implementing it from scratch or by subclassing
ChildPropertyTreeModel.

-- Adam


On 10/9/06, Clemens Schneider <clemens.schneider@gmail.com> wrote:
> 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:awiner@gmail.com]
> > Sent: Monday, October 09, 2006 12:43 PM
> > To: adffaces-user@incubator.apache.org
> > 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 <NBhatia@sapient.com> 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:NBhatia@sapient.com]
> >> Sent: Saturday, October 07, 2006 6:28 PM
> >> To: adffaces-user@incubator.apache.org
> >> 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:clemens.schneider@gmail.com]
> >> Sent: Saturday, October 07, 2006 5:02 PM
> >> To: adffaces-user@incubator.apache.org
> >> 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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