[and again, with the actual CC this time ...] On Friday, 16 October 2015, Daniel Stone <<a href="mailto:daniel@fooishbar.org">daniel@fooishbar.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, On Wednesday, 30 September 2015, Carlos Garnacho <<a href="javascript:_e(%7B%7D,'cvml','carlosg@gnome.org');" target="_blank">carlosg@gnome.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Currently, there's no means for the DnD origin to know whether the destination is actually finished with the DnD transaction, short of finalizing it after the first transfer finishes, or leaking it forever. But this poses other interoperation problems, drag destinations might be requesting several mimetypes at once, might be just poking to find out the most suitable format, might want to defer the action to a popup, might be poking contents early before the selection was dropped... In addition, data_source.cancelled is suitable for the situations where the DnD operation fails (not on a drop target, no matching mimetypes, etc..), but seems undocumented for that use (and unused in weston's DnD). In order to improve the situation, the drag source should be notified of all stages of DnD. In addition to documenting the "cancelled" event for DnD purposes, The following 2 events have been added: - wl_data_source.drop_performed: Happens when the operation has been physically finished (eg. the button is released), it could be the right place to reset the pointer cursor back and undo any other state resulting from the initial button press. - wl_data_source.drag_finished: Happens when the destination side destroys the wl_data_offer, at this point the source can just forget all data related to the DnD selection as well, plus optionally deleting the data on move operations. Signed-off-by: Carlos Garnacho <<a>carlosg@gnome.org</a>></blockquote><div> </div><div> Mike had a look at this from EFL - CCing him.</div><div> </div><div>Cheers,</div><div>Daniel </div> </blockquote>