Drag-Drop problem

[ratondeau]

Hello,

Modified the drag-n-drop example from the demo a bit and the following question occured:

How do I find out the drag source (dataTable or panel is or any string) if I drag a panel around?

I tried to use the actionParameter tag but it is called after the drop event so it will not work this way.
Every panel should support both drag and drop. I want to put back an element from php stack back
to the first panel and it should be possible to drop each item into any of the panels. So I need to know
where the item comes from to remove it from the list.

<rich:panel styleClass="dropTargetPanel">
 <f:facet name="header">
 <h:outputText value="PHP Frameworks" />
 </f:facet>

 <rich:dropSupport id="php" acceptedTypes="PHP,CF,DNET" dropValue="PHP"
 dropListener="#{eventBean.processDrop}" reRender="phptable, src">
 </rich:dropSupport>

 <h:dataTable id="phptable" columns="1" value="#{dndBean.containerPHP}" var="fm">
 <h:column>
 <a4j:outputPanel style="border:1px solid gray;padding:2px;" layout="block">
 <rich:dragSupport dragType="#{fm.family}" dragValue="#{fm}">
 <rich:dndParam name="label" value="#{fm.name}" />
 <a4j:actionparam name="source" value="PHP-STACK" assignTo="#{dndBean.source}"/>
 </rich:dragSupport>
 <h:outputText value="#{fm.name}"></h:outputText>
 </a4j:outputPanel>
 </h:column>
 </h:dataTable>
</rich:panel>

I suppose the solution is quite easy but I do not know how. The setter of the source property
is called after the processDrop method is called.

Thanks for every help

Regards
Matt

[pankaj.ghosh]

Hopefully I have understood your problem correctly.

When you are processing a drop event, you can fetch 3 values: dragValue, dropValue and dragType. You can set the dragType to sourcePanelName to know the source of drag.

Hope this helps.

Pankaj

[ratondeau]

yes you have understood it properly. I solved it with the help of your advise.

Thanks

Matt