CODEWITHSUNDEEP
javascriptc++htmldrag-and-dropidataobject
Kailas
Kailas

Reputation: 827

Drag and Drop From HTML pages to C++ applications

I am trying to implement Drag And Drop Functionality from Web Pages to C++ Applications.

I am setting text on drag to dataTransfer object and now trying to access it on DropTarget from IDataObject. To Get Data from IDataObject, we need to specify FORMATETC, which I guess I am facing problem with.

Here is the code: On HTML Side I have below javascript executed on Drag.

function drag(ev) {
    ev.dataTransfer.setData("text", ev.target.id);
}

On C++ side: I have DropTarget, implementing IDropTarget and inside ::Drop method i receive IDataObject.

To get data from this, I am using below code:

   FORMATETC fre;
   fre.cfFormat = CF_TEXT;
   fre.dwAspect = DVASPECT_CONTENT;
   fre.ptd = nullptr;
   fre.tymed = TYMED_HGLOBAL;
   fre.lindex = -1;

   STGMEDIUM stg;
   stg.hGlobal = nullptr;
   stg.pUnkForRelease = nullptr;

   bool result = false;

   if (NOERROR == pDataObj->GetData(&fre, &stg))
   {
       result = true;
   }

But I am not able to retrieve data here. Can someone please help me out here?

Thanks, Kailas

Upvotes: 1

Views: 131

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