In Beehive, the variables being bound to for all expressions must be
properties and not member variables in the page flow.
BTW, in Beehive the framework sill take care of selection/expansion
for you if you bind to the same tree variable from request to request.
On 4/23/05, Srini <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I am trying out an example with the <netui:tree> and <netui:treeItem> and
> <netui:treeLabel> tags
>
> I am getting the following error
>
> Caught exception when evaluating expression "{session.myTree}" with available
> binding contexts [actionForm, pageFlow, globalApp, request, session,
> application, pageContext, bundle, container, url, pageInput]. Root cause:
> java.lang.RuntimeException: Can not evaluate the identifier "myTree" on a
> null value object
>
> I am trying to use the same example that is given in the documentation of
> netui:tree tag
>
> <netui:tree
> dataSource="pageflow.myTree"
> selectionAction="treeState"
> tagId="myTree">
> <netui:treeItem expanded="true" >
> <netui:treeLabel>Root Folder</netui:treeLabel>
> <netui:treeItem expanded="false">
> <netui:treeLabel>I</netui:treeLabel>
> <netui:treeItem expanded="false">
> <netui:treeLabel>A</netui:treeLabel>
> <netui:treeItem>1</netui:treeItem>
> <netui:treeItem>2</netui:treeItem>
> </netui:treeItem>
> </netui:treeItem>
> </netui:treeItem>
> </netui:tree>
>
> Here is the code in controller.jpf
>
> public Forward treeState() {
> TreeElement rootNode = this.getMyTree();
> String selectedNode = null;
> String expandedNode = null;
> selectedNode = getRequest().getParameter(TreeElement.SELECTED_NODE);
> expandedNode = getRequest().getParameter(TreeElement.EXPAND_NODE);
> if (expandedNode != null) {
> TreeElement node = rootNode.findNode(expandedNode);
> if (node != null) {
> node.setExpanded(!node.isExpanded());
> }
> return new Forward("tree");
> }
> return new Forward(selectedNode);
> }
>
> I have "myTree" variable of type TreeElement in the controller.
>
> I think an example of netui:tree on the beehive site will be very very
> helpful.
>
> Thanks
> Srini
>
>
