FW: [gtkmm] drag and drop with multiple targets

["Ohrnberger, Erik" <erik_ohrnberger dme net>]

Callum,
	I was pretty much wrapped up in much the same issue.  With
everyone's help on this list, especially Murray's, I was able to put this
email summary together.  Perhaps you'll find it as useful as I did in
resolving my drag and drop questions.

	Cheers,
		Erik.

Behalf Of Ohrnberger, Erik
> Paul,
> 	I've read the paper by Owen Taylor about drag and drop 
> in GTK+ and GNOME, and I've followed that to the indicated 
> resources IANA MIME type registry 
> (ftp://ftp.isi.edu/in-notes/iana/assignments/media-type).
> 
> 	This appears to me as a pretty significant issue when 
> it comes to application design and interoperability.  I'm 
> rather surprised that at least references to this discussion 
> and the MIME type registry is not included in the tutorial 
> about drag and drop.  It really should be in there (IMHO).
> 
> 	Do you, or the gtkmm tutorial authors, think that it 
> would a significant loss of information should the Taylor 
> paper not become available in the future?  If so, is there a 
> means that this could be incorporated into the tutorial?

I'm reading this thread now. I wrote the Drag and Drop stuff in the
documentation. It's the first time that I have heard about MIME types in
relation to Drag and Drop, but maybe this solves the mystery of what the
hell those target names are. I'll try to investigate and update the book.
Obviously this stuff should be in there if it's appropriate.

> 	Anyway, with the Taylor paper, the IANA registry, and 
> the information in the tutorial, I much better understand 
> what's going on, why it's significant, and how to implement 
> it better.  It would seem to me that including this 
> information, or at least references, and / or links, to this 
> information, really should be part of the tutorial so that 
> the readers of the tutorial understand the wider implications 
> of the design and implementation decisions that they are 
> making.  It certainly opened my eyes to it all.
> 
> 	In conclusion, I guess this email boils down to an 
> enhancement request for the tutorial documentation.
> 
> 	Cheers and best wishes,
> 		Erik.

Murray Cumming
www.murrayc.com
murrayc usa net

> 
> > -----Original Message-----
> > From: Ohrnberger, Erik
> > Sent: Monday, November 17, 2003 11:40 AM
> > To: Ohrnberger, Erik
> > Subject: RE: [gtkmm] Drag And Drop Context data
> > 
> > 
> > Paul,
> > 	Very much thank you.  I found it.  I'll be reading that.
> > 
> > 	Thanks,
> > 		Erik.
> > 
> > > -----Original Message-----
> > > From: Paul Davis [mailto:paul linuxaudiosystems com]
> > > Sent: Saturday, November 15, 2003 1:47 PM
> > > To: Erik echohome org
> > > Cc: gtkmm-list gnome org
> > > Subject: Re: [gtkmm] Drag And Drop Context data 
> > > 
> > > 
> > > >Paul,
> > > >	I check with Google, as well as http://www.gtkmm.org,
> > > and other than
> > > >what I've already read, I've not found any additional 
> information.
> > > 
> > > google: MIME drag drop target
> > > 
> > > the most useful link is about 2/3 down on the first page,
> > > points to a PS file at redhat.com. i can't cut-n-paste it 
> > > very easily ...
> > > 
> > > --p
> > > 
> > 
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org http://mail.gnome.org/mailman/listinfo/gtkmm-list
> 

> -----Original Message-----
> From: Erik Ch. Ohrnberger [mailto:Erik mail echohome org]
> Sent: Wednesday, February 04, 2004 6:29 PM
> To: Ohrnberger, Erik
> Subject: [gtkmm] drag and drop with multiple targets
> 
> 
> gtkmm-list gnome org
> Callum Prentice[lists callum com]
> 
> i recently posted this to the regular gtk list but didn't receive any
> feedback - i didn't realize this list existed until today so 
> am re-posting
> here.
> 
> part of my application involves being able to shuffle around 
> small (say:
> 64x64) images using drag and drop and i'm trying to implement 
> this using the
> mechanism built into gtk+.
> 
> as far as i can tell, you need to have a separate container of
> Gtk::TargetEntry's for each source/target - you can't tell 
> what the source
> was otherwise - given that i could have lots (100's perhaps) 
> of these, is
> there a better way ?
> 
> i'm using regular buttons (eventually with the images 
> embedded) for each
> element since it looks like that is the only option for a 
> drag/drop source -
> is there a better widget to use ? labels didn't seem to work.
> 
> any comments appreciated ? 
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