Issue with Drag&Drop between table and tree component

Question

I want to drag table rows and drop it on the tree node. I use following code to achieve this:
<af:table value="#{bindings.pricingObjects.collectionModel}"
var="row"
rows="#{bindings.pricingObjects.rangeSize}"
emptyText="#{bindings.pricingObjects.viewable ? 'No data to display.' : 'Access Denied.'}"
fetchSize="#{bindings.pricingObjects.rangeSize}"
selectionListener="#{workspaceBean.onTableSelect}"
rowBandingInterval="0" id="poTable"
partialTriggers=":::csTree :::cbRefresh"
columnStretching="column:c4"
displayRow="selected"
contentDelivery="immediate"
clientComponent="true"
binding="#{workspaceBean.table}"
rowSelection="multiple">
<af:dragSource actions="MOVE" defaultAction="MOVE" discriminant="rowmove"/>
</af:table>
<af:tree value="#{bindings.privateChangeSets.treeModel}"
var="node" displayRow="selected"
selectionListener="#{workspaceBean.onTreeSelect}"
rowSelection="single" id="csTree"
expandAllEnabled="false"
binding="#{workspaceBean.tree}">
<af:dropTarget dropListener="#{workspaceBean.dropListener}" actions="MOVE">
<af:dataFlavor flavorClass="org.apache.myfaces.trinidad.model.RowKeySet"
discriminant="rowmove"/>
</af:dropTarget>
</af:tree>
With this code I am getting the data of dragged rows but I am not able to get the tree node where rows are dropped. Dropevent.getDropSite() always returns NULL.
Strangely, I tried to use deprecated tags <af:collectionDragSource> and <af:collectionDropTarget> and everything works fine. Dropevent.getDropSite() returns me the correct rowkey of tree node.
Any idea why am I not getting desired result with <af:dropTarget>?

Answer 1

Hi,
+" Please note that dropSite==null is a legal value for collection components. dropSite=null and DropOrientation==ON indicates that the drop has happened outside the data portion of the collection component and should be treated as a drop on the entire component Also note that dropSite==null and DropOrientation==AFTER indicates that the drop has happened on an empty collection component and the user intends to append the data."+
http://download.oracle.com/docs/cd/E17904_01/apirefs.1111/e10684/oracle/adf/view/rich/event/DropEvent.html#getDropSite__
List dropRowKey = (List) dropEvent.getDropSite();
        //if no dropsite then drop area was not a data area
        if(dropRowKey == null){
            return DnDAction.NONE;
        }Frank
Edited by: Frank Nimphius on Feb 18, 2011 11:18 PM