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Struts & Hibernate
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| | | -none- | -none- 2007-09-06 - By Manu Mahajan
Back
Hi Session
I don't know if it can be done only via the struts tags but I was able to
achieve this by using some dojo javascript code in my jsp.
Here are some code snippets that might solve your problem
<html>
<head>
.
.
.
<s:head theme="ajax" debug="true"/>
//The following extensions are required to save or restore state of a tree
dojo.require("dojo.widget.TreeLoadingController");
dojo.require("dojo.widget.TreeControllerExtension");
dojo.addOnLoad(function() {
dojo.lang.mixin(dojo.widget.byId('treeController'),
dojo.widget.TreeControllerExtension.prototype);
//The following code will make sure that the saveExpandedIndices
function is called everytime a node
//is collapsed or expanded
dojo.event.topic.subscribe("contentTree/expand",saveExpandedIndices);
dojo.event.topic.subscribe("contentTree/collapse",saveExpandedIndices);
});
//The following function saves the state of the tree
function saveExpandedIndices() {
// You can save this object as tree persistent state
indices = dojo.widget.byId('treeController').saveExpandedIndices(
dojo.widget.byId('contentTree')
);
/*
* "indices" is a javascript object which is nothing but a
multi-dimension arrays containing indices of all expanded nodes
* I am saving this object inside a cookie. You can have a different
implementation...
* I am using json.js to convert the object into a string
* and then a custom function called storeCookie which stores the string
in a cookie
*/
storeCookie("categoryTreeState",indices.toJSONString(),1);
}
.
.
.
//The following function restores the state of the tree. This can probably
be called body-onload
//You will have to pass it the stored indices object though
function restoreExpandedIndices(indices) {
dojo.widget.byId('treeController').restoreExpandedIndices(
dojo.widget.byId('contentTree'), indices
);
}
.
.
.
</head>
<body>
.
.
.
<div dojoType="TreeLoadingController" widgetId="treeController"
RPCUrl="local"></div>
<s:tree id="contentTree"
name="contentTree"
theme = "ajax"
rootNode="%{category}"
childCollectionProperty="categoryList"
nodeIdProperty="identifierString"
nodeTitleProperty="name">
</s:tree>
.
.
.
</body>
Hope this helps.
Manu
-- --Original Message-- --
From: Session A Mwamufiya [mailto:smwamufi@(protected)]
Sent: Wednesday, September 05, 2007 10:34 PM
To: Struts Users Mailing List
Cc: Struts Users Mailing List
Subject: Re: reloading a tree at a certain level of expension
Anyone knows whether this feature has been added in yet?
> Session A Mwamufiya wrote:
>> I'm relaunching this thread in case an s:tree expert may have missed it
>> the first time around :).
>>
>>> Is there a way that when a s:tree is reloaded, it expends to a
>>> particular level of expansion? I presume that I will save that
>>> expansion level in my session object, but I'm not sure how to get it
>>> or set the tree to it, or if it's even possible.
>
>
> Looking into TreeSelector API I found a selectedNode parameter - will it
> do the job? Feel free to ask Struts2 developers to include selectedNode
> parameter into s:tree tag if is does what you expect (and if it's not
> included there yet - sometimes S2 code changes faster than its
> documentation).
>
> Oleg
>
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>
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