DnD with the customized object

Question

please help me friends.....I met some problem relating to the drag and drop mechanism. I have a JList, consist of several customized object, and I want to drag to item from the list to an JPanel elsewhere, I configure my jpanel as follow, but the drop action seems not working on my JPanel. I put the code in jpanel here first:
setTransferHandler(new TransferHandler(){
               public boolean canImport(TransferSupport support) {  
                       if (!support.isDrop()) {  
                         return false;  
                       if (!support.isDataFlavorSupported(new DataFlavor(CommercialRuleConditionAttribute.class,"attribute"))) {  
                         return false;  
                       return true;  
                     public boolean importData(TransferSupport support) {  
                       if (!canImport(support)) {  
                         return false;  
                       CommercialRuleConditionAttribute attribute;  
                       try {  
                            attribute =  (CommercialRuleConditionAttribute)support.getTransferable().getTransferData(  
                                      new DataFlavor(CommercialRuleConditionAttribute.class,"attribute"));  
                       } catch (UnsupportedFlavorException e) {  
                         return false;  
                       } catch (IOException e) {  
                         return false;  
                       for(CommercialRuleConditionFunction function: attribute.getFunctionList()){
                            if(function instanceof CommercialRuleConditionFunctionAsIs){
                                 injectPanel(function);
                       return true;  
          }); CommercialRuleConditionAttribute is my customized object class, on the jlist side, I already make setDragEnabled(true), besides this, do I need to do any more on the list side? I mean something like override the createTransferable()? Thanks, my friend

Answer 1

Well, I don't really like these theroretical discussions. Can you attach a simplified version of some of your code?
There are many other ways to identify the particular control. You could for example search an array of references for the value of the "ctlref" event data node. This would make the code much more robust (your code will fail for example if you (or some other programmer updating your code in a few years!) notices a mispelling and edits the label without also changing the case structure cases).
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