Re: D&D Drop notification

Håkan,

As far as I can see there is no feedback to the drag source when a drop
has occurred.
So if the user modifies the drag from a copy to a move by holding down a
modifier key how do you tell?

What am I missing?

Is it the case that two drop events occur? So a drag observer on the
source and on the target both receive drop notifications?

As an alternative, I tried to pass the current window as flavour data -
but this fails completely. The intention here was to determine the
source of the drag and to setup communication via a known callback
function. Unfortunately, the object returned in the
drop(.. dropdata..) method: dropdata.supports will not QI to the
dropData.dataIIDKey given in the flavour object (nsIDOMWindow). It has
been reduced to a XPCWrappedNative_NoHelper which seems to have no
properties and will not QI to any of the available
Components.interfaces... IIDs.  I hit this same problem recently trying
to get nsITransactionManager to work with Javascript defined transaction
objects. Is D&D still hard wired for string, file and URL types only?