How to preserve tree state betwean page requests?

[stef5636]

I have a tree with TreeNodeAdaptor. If I open one leaf and refresh a page, the tree is closed. How can I leave a tree opened at that leaf?

[maksimkaszynski]

Actually, tree stores all the expanded nodes, unless its told not to do it.
Please attach your page code.

[stef5636]

I have a rich tree in facelets template.

<ui:include src="tree.xhtml" />


in tree.xhtml is:
<rich:tree toggleOnClick="true">

<rich:treeNodesAdaptor var="item" nodes="#{brands}">
<rich:treeNode >
<h:outputText value="#{item.nameDecode}"/>
</rich:treeNode>

<rich:treeNodesAdaptor var="grp" nodes="#{treelists.getGroups(item.id)}">
<rich:treeNode>
<h:outputText value="#{grp.nameDecode}"/>
</rich:treeNode>

<rich:treeNodesAdaptor var="subgrp" nodes="#{treelists.getSubGroups(item.id, grp.id)}">
<rich:treeNode>
<s:link action="list" value="#{subgrp.nameDecode}">
<f:param name="p" value="#{item.id}"/>
<f:param name="g" value="#{grp.id}"/>
<f:param name="s" value="#{subgrp.id}"/>
</s:link>
</rich:treeNode>


When click on the link, will show other page, but with tree in left. The question is, how to show the tree, opened at same leaf?

[maksimkaszynski]

Actually, the problem is in that when you have only ajax requests, and then perform refresh, JSF doesn't recognize it as postback, and therefore doesn't restore view state. So if you want your page to be correctly refreshed, use varState attribute to save tree state in session-scoped bean.

[stef5636]

example, please? How to use varState?
What type must be variable in Session Bean?

Thanks for answer!

[nightiger]

varState or stateVar ??????

[maksimkaszynski]

Looks that I mislead you a bit. Next example works
Tree on the page

<rich:tree style="width:300px" height="400px" switchType="ajax" componentState="#{simpleTreeBean.treeState}">
 <rich:recursiveTreeNodesAdaptor roots="#{fileSystemBean.sourceRoots}" var="item" nodes="#{item.nodes}" />
</rich:tree>

Piece of session bean

 private TreeState treeState;

 public TreeState getTreeState() {
 return treeState;
 }

 public void setTreeState(TreeState treeState) {
 this.treeState = treeState;
 }

[maksimkaszynski]

Notice componentState binding. It maps to field of type org.richfaces.component.state.TreeState