Hi everybody,
I'm stucked with this problem:
I'm trying to implement a Drag'n Drop Tree where I can move the nodes around. The recursiveTreeNodesAdaptor seems to be perfect to fullfill my requirements.
<rich:tree switchType="ajax" nodeSelectListener="#{depotManager.processSelection}" ajaxSubmitSelection="true"
reRender="depotTab" id="tree" dragIndicator="dragIndicator" dropListener="#{depotManager.dropListener}" >
<rich:recursiveTreeNodesAdaptor roots="#{depotManager.getRoot()}" var="item" nodes="#{item.children}">
<rich:treeNode acceptedTypes="depot" ragType="depot">
<rich:dndParam name="label" type="drag">
#{item.name}
</rich:dndParam>
<h:outputText value="#{item.name}" />
</rich:treeNode>
</rich:recursiveTreeNodesAdaptor>
</rich:tree>The problem occurs while implementing the dropListener method. I had a look at the SimpleTreeDndBean class, which is used by the drag'n drop sample at RichFaces LiveDemo. Okay, so far so good.
While retrieving the draggedNode I always get a null return value, although the dragNodeKey is not null.
TreeRowKey dragNodeKey = (dropEvent.getDragValue() instanceof TreeRowKey) ? (TreeRowKey) dropEvent.getDragValue() : null;
TreeNode draggedNode = dragNodeKey != null ? srcTree.getTreeNode(dragNodeKey) : null;
A fast look at the API tells me:
Adaptor-based trees do not use TreeNode, so the method always return null for such trees. Please use UIDataAdaptor.getRowData() instead.
The data I will recieve with this is, btw, not a TreeNode. Okay, here it comes. How am I supposed to do this:
TreeNode parentNode = draggedNode.getParent();
state = srcTree.removeNode(dragNodeKey);
Object rowKey = srcTree.getTreeNodeRowKey(parentNode);
if draggedNode is always null, an Adaptor-based tree even not use TreeNodes.
I would be pleased, if anyone can help me out with this problem.
Thanks in advance
Rene
