Launcher Metatask - Better support DND to apps which only has drop targets as secondary feature

[Mikkel Kamstrup Erlandsen]

This sort of a metabug, to keep track of something which is a set of very related work items.

Taking Rhythmbox as an *example*[1] - you can drop images onto the CD-cover widget to register an image as a cover. What we should support (and somewhat, but only barely) is:

 1) RB and Nautilus maximized
 2) Drag image file from N over launcher
 3) RB icon lights up
 4) Drag over RB
 5) RB window pops up
 6) Move over RB window and drop into CD-cover widget

There are a few problems with this currently:

 a) RB have not registered itself to being able to open image files. This makes sort of sense since you can't pass images to it over the command line, only drop them on a running instance

 b) If you hack the MimeType line in RB's .desktop file to accept images (append image/jpeg;image/png;) you can get this working, more or less. But the experience is not very smooth.

So the tasks I see here are:

 i) Figure out how to register this "secondary drop-target feature" thing and patch the .desktop files of high profile apps

 ii) Polish the DND behaviour for these scenarios

[1]: Example derived from http://askubuntu.com/questions/29025/how-to-drag-and-drop-a-picture-from-a-home-folder-into-an-open-application-in-ful/29116#29116

[SoloTurn (soloturn)]

if one marks text in, say, google chromium, and want to drag and drop it into an open text editor then this would be the same bug, or should i open another one?