Drop an URL on a InDesign document from a Flex panel

Question

Hi Everyone,
I have a Flex panel, in InDesign, from which I drag an URL. If I drop this URL on a text editor or a web browser, it works. But when I try to drop it on my InDesign document, it's a little bit harder.
I have implemented a subclass of CDragDropTargetFlavorHelper. The drop works perfectly on Windows. But on mac, I have problems in the method CouldAcceptTypes :
DragDrop::TargetResponse
AutocatDNDCustomFlavorHelper::CouldAcceptTypes(const IDragDropTarget* target, DataObjectIterator* dataIter, const IDragDropSource* fromSource, const IDragDropController* controller) const
               if (0 != dataIter && 0 != target)
            DataExchangeResponse response = dataIter->FlavorExistsWithPriorityInAllObjects(kURLDExternalFlavor);
                              if (response.CanDo())
The problem is that response.canDo() answers kTrue on Windows, but kFalse on Mac. I tried to explore the content of dataIter, but a call on dataIter->First() returns nil. I tried a controller->GetItemCount(), which returns 1. But if I try a controller->GetDragItem(1), I get a nil pointer. I have the impress there is no item.  Though, the drop works on another app than InDesign, as I said.
Is it a problem of internalization ? Or something else ? It let me dry.
Thanks in advance

Answer 1

Hi,
I solved this problem, but discovered another one. The flavor sent by the flex panel has been changed, so that it's a text flavor instead of an URL flavor. My method couldAcceptType works now :
DragDrop::TargetResponse
AutocatDNDCustomFlavorHelper::CouldAcceptTypes(const IDragDropTarget* target, DataObjectIterator* dataIter, const IDragDropSource* fromSource, const IDragDropController* controller) const
     if (0 != dataIter && 0 != target)
          // Check for URL Flavor in the drag
          DataExchangeResponse response = dataIter->FlavorExistsWithPriorityInAllObjects(kTEXTExternalFlavor);
               if (response.CanDo())
                    return DragDrop::TargetResponse(response, DragDrop::kDropWillCopy);
     return DragDrop::kWontAcceptTargetResponse;
The problem is now in the ProcessDragDropCommand method. Here is the code :
ErrorCode AutocatDNDCustomFlavorHelper::ProcessDragDropCommand(IDragDropTarget*                               target, IDragDropController* controller, DragDrop::eCommandType                    action)
       // retrieve drop data
               IPMDataObject* dragDataObject = controller->GetDragItem(1);
               uint32 dataSize = dragDataObject->GetSizeOfFlavorData(kTEXTExternalFlavor) ;
The problem is the IMPDataObject I get is nil. There is no item in the controller. However, there were items in the CouldAcceptTypes method, in the DataObjectIterator. So, where are my items ?
I tried using a custom CDataExchangeHandlerFor, but could not really understand what its usage was for. It didn't work anyway.
Has anyone an idea ?
Regards,
Rémi