Program activation by dragging doesn't work

[gabdub]

The dock does not activate another running program when dragging a file from caja over the program icon.

I'm running version v0.85 (GTK3) from Ubuntu Mate 18.04 Beta 2 + updates.

I added some calls to log_it() and found that in the function applet_drag_motion (dock_applet.py line 512) the test if app is None: is always false. It seems that app is not set to None when the drag begins.

[gabdub]

Now running Ubuntu Mate 18.04 (not beta).

If I remove the test, the drag works again.

[nschulzke]

I think it's actually missing a definition for app:

    app = the_dock.get_dragee()

This is in the applet_drag_end function, and adding this line just before the check solves the problem for me.

[gabdub]

Yes, I think you are right.

[robint99]

Thanks to you both for looking into this. It seems that I accidentally deleted that line of code back in February ... I've put it back and committed the change, so I'll close this issue now.

Cheers.