[Bug 51772] Drag and drop issue - DROPEFFECT zero

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51772

Damjan Jovanovic <damjan.jov at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |source
                URL|                            |https://github.com/TT-ReBOR
                   |                            |N/Georgia-ReBORN
                 CC|                            |damjan.jov at gmail.com

--- Comment #1 from Damjan Jovanovic <damjan.jov at gmail.com> ---
I developed a lot of the drag and drop code, but am unable to test at the
moment.

>From the log you posted on that forum, it appears to be an interprocess drag
and drop (drag source is in one application, drop target in another), which is
why it goes through [drag source] -> XDND -> [drop target's winex11.drv].

Multiple things could be wrong, we don't support IDropTargetHelper::DragOver()
or IDataObject::SetData(), the ominous

00f4:fixme:xdnd:X11DRV_XDND_DROPEFFECTToXdndAction unknown drop effect 0,
assuming XdndActionCopy

suggests something is also wrong coming in from the drag source, and the drop
effect might also not be set correctly in ole32.

It would help a lot to read the source code of the drag source. What is the
architecture of your drag source application? It appears to use Python and
Javascript somehow. Where is the C/C++ code that calls DoDragDrop()?

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