How? I followed the example from the demo, and on one of the drop support panel i put the definition of a drag support which i take it from the first panel. Made a 3rd panel to accept the drag types from the second panel. I cand drag fro the 1st panel and drop on the 2nd one. I can drag from the 2nd one, on the 3rd one, but in this case nothing is happening. With the debugger, when i try to drag from 2nd to 3rd panel it doesn't enter in dropListener method (DropEvent dropEvent) from the backing bean.

<rich:panel style="width:133px">
 <f:facet name="header">
 <h:outputText value="Source List" />
 </f:facet>
 <rich:dropSupport id="php2" acceptedTypes="items2" dropValue="items2"
 dropListener="#{registerEvent.processDrop2}" reRender="phptable, src">
 </rich:dropSupport>
 <h:dataTable id="src" columns="1" value="#{registerEvent.events}" var="fm" footerClass="footerClass">
 <h:column>
 <a4j:outputPanel style="width:100px;border:1px solid gray;padding:2px" layout="block">
 <rich:dragSupport dragIndicator=":indicator" dragType="items" dragValue="#{fm}">
 <rich:dndParam name="label" value="#{fm.name}" />
 </rich:dragSupport>
 <h:outputText value="#{fm.name}"></h:outputText>
 </a4j:outputPanel>
 </h:column>
 </h:dataTable>
 </rich:panel>

 <rich:panel styleClass="dropTargetPanel">
 <f:facet name="header">
 <h:outputText value="PHP Frameworks" />
 </f:facet>
 <rich:dropSupport id="php" acceptedTypes="items" dropValue="items"
 dropListener="#{registerEvent.processDrop}" reRender="phptable, src">
 </rich:dropSupport>

 <h:dataTable id="phptable" columns="1" value="#{registerEvent.dataDragged}" var="fm">
 <h:column>
 <a4j:outputPanel style="width:100px;border:1px solid gray;padding:2px" layout="block">
 <rich:dragSupport dragIndicator=":indicator" dragType="items2" dragValue="#{fm}">
 <rich:dndParam name="label2" value="#{fm.name}" />
 </rich:dragSupport>
 </a4j:outputPanel>
 <h:outputText value="#{fm.name}"></h:outputText>
 </h:column>
 </h:dataTable>
 </rich:panel>

 public void processDrop(DropEvent dropEvent)
 {
 events.remove(dropEvent.getDragValue());
 getDataDraggedStatic().add((Events)dropEvent.getDragValue());
 dataDragged = dataDraggedStatic;
 }

 public void processDrop2(DropEvent dropEvent)
 {
 events.add((Events)dropEvent.getDragValue());
 dataDragged.remove((Events)dropEvent.getDragValue());
 dataDragged = dataDraggedStatic;
 }

It still doesn't work:(

This is jsf code:

<rich:panel style="width:133px">
 <f:facet name="header">
 <h:outputText value="Source List" />
 </f:facet>
 <rich:dropSupport id="php2" acceptedTypes="items2" dropValue="items2"
 dropListener="#{registerEvent.processDrop2}" reRender="phptable, src">
 </rich:dropSupport>
 <h:dataTable id="src" columns="1" value="#{registerEvent.events}" var="fm" footerClass="footerClass">
 <h:column>
 <a4j:outputPanel style="width:100px;border:1px solid gray;padding:2px" layout="block">
 <rich:dragSupport dragIndicator=":indicator" dragType="items" dragValue="#{fm}">
 <rich:dndParam name="label" value="#{fm.name}" type="drag"/>
 </rich:dragSupport>
 <h:outputText value="#{fm.name}"></h:outputText>
 </a4j:outputPanel>
 </h:column>
 </h:dataTable>
 </rich:panel>

 <rich:panel styleClass="dropTargetPanel">
 <f:facet name="header">
 <h:outputText value="PHP Frameworks" />
 </f:facet>
 <rich:dropSupport id="php" acceptedTypes="items" dropValue="items"
 dropListener="#{registerEvent.processDrop}" reRender="phptable, src">
 </rich:dropSupport>

 <h:dataTable id="phptable" columns="1" value="#{registerEvent.dataDragged}" var="fm">
 <h:column>
 <a4j:outputPanel style="width:100px;border:1px solid gray;padding:2px" layout="block">
 <rich:dragSupport dragIndicator=":indicator" dragType="items2" dragValue="#{fm}">
 <rich:dndParam name="label" value="#{fm.name}"/>
 </rich:dragSupport>
 <h:outputText value="#{fm.name}"></h:outputText>
 </a4j:outputPanel>
 </h:column>
 </h:dataTable>
 </rich:panel>

The methods from backing bean are the same.

I think the problem is on the client because it doesn't enter in the listener #{registerEvent.processDrop2}
when i dragged from the 2nd panel into the 1st one.

Your posted code, doesn't work for me.

My richfaces version is 3.3.1 and JSF 1.2 and i'm using richfaces as the JSF implementation.

And if you saw in my code, i had to use a static version to keep the objects. If i had used only one vector, a non-static one, i wouldnt have been able to have more than one element in the drop panel, because everytime i would have drag and drop an element, the list that was suposed to keep all the elements, was reinitializing each time. So thats why i had this workaround, a static vector for keeping the elements. And after this i make

eventsList = staticEventsList
You can see it exactly in the bean code.

In the properties of my project (I am using eclipse) at Java Build Path there is richfaces library. If I edit that library, to replace the jar's with some other richfaces version, in case i want that, there is a box where i can check if the library is JSF implementation or not. Mine is checked.
I'm using Seam for developing my project and seam-gen plugin from JBoss Tools for making the poject at the first time.

In the properties of my project (I am using eclipse) at Java Build Path there is richfaces library. If I edit that library, to replace the jar's with some other richfaces version, in case i want that, there is a box where i can check if the library is JSF implementation or not. Mine is checked.
I'm using Seam for developing my project and seam-gen plugin from JBoss Tools for making the poject at the first time.

Yes, but the main question still remains..why doesn't work for me to have drag and drop support on the same component?