Refresh two regions at a time

Question

Hi,
Iam new to ADF Framework. Using JDeveloper 11.1.1.5.0. Following is the high level description of our requirement.
I've JSF page with four regions localted at left,Center, Bottom & Right. Left region having three buttons. Based on button click, center region will be populated with corresponding tree. User can select the required elements from the each tree & then click on 'Submit' button (which is in Center region).
As of now Iam able to achieve till this part with the help of " Programmatic Partial page refresh (PPR) with dynamic regions »http://asktown.co.uk/?p=223"
Now the pending part is, If user clicks on 'Submit' Button then need to send the selected item references to bottom region & right region at a time to do some thing. i.e Bottom region will display the selected items and right region will perform calculation part.
There are two things pending as I know
1. Getting the selected nodes from three trees(Each botton will display separate tree in center region)
2. Refreshing two regions (bottom & right) at a time with Submit click.
Ihope, If i could achieve these two things,Iam almost done with my task.
Can you provide hint to proceed on these two things. It would be helpful, if some one provide pointer to achive this task.
Thanks in advance,
MSR.

Answer 1

Hi,
if you use shared data controls then this is not so difficult to achieve. Here's what you would do
1. http://docs.oracle.com/cd/E23943_01/web.1111/b31974/web_masterdetail.htm#sthref2108 --> "Using the TargetIterator Property" explains how to synchronize iterators with the selection in the tree. Say the tree has locations, departments and employees. Then when you click the employees node, a employees iterator is synchronized
2. For each iterator used or referenced by the tree create an attributeValue binding for the value you want to pass on to the other regions
3. the region input parameters of the two regions to synchronize point to a managed bean in view scope. The refresh condition is set to if needed on the task flow binding so that when the input parameter value changes, the region restarts the contained task flow
4. See http://www.oracle.com/technetwork/developer-tools/adf/learnmore/50-synchromize-form-treeselection-169192.pdf (--> page 6, "Building the Custom Selection Listener"). Change this code so that whenever a user selected a tree node you
i) retain the default functionality
ii) determine the selected node and read the attribute value binding for this node. Say the node is employees and the attributeValueBinding you created is for EmployeeId. Then the code looks like
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
AttributeBinding attr = (AttributeBinding) bindings.get("EmployeeId);
Object selectedNodeValue = attr.getInputValue();
5) Set the selectedNodeValue to the managed bean property referenced from the region input parameters
6) Call AdfFacesContext.getCurrentInstance().addPartialTarget(region reference) for each region
7) The last thing to consider is that the tree is in a region itself. So here is some complexity that you handle following the idea mentioned in this blog (http://one-size-doesnt-fit-all.blogspot.de/2010/09/master-child-btf-chaperone-contextual.html)
Since the two dependent regions are refreshed by the parent view, you need to define a managed bean in view scope for the parent view and then pass the bean as an input parameter reference to the region having the tree component. You use this handle then to pass the selected EmployeeId and the partial refresh notification to the view bean. The bean then sets the managed bean property read by the task flows in the dependent regions
Frank
Ps.: This is a very complex use case for a start with ADF
Frank