Le 17/08/2010 02:04, Jason Gross a écrit :
Is it possible to get more specificity than just the type of the
object being dragged? For example, if I have red images and blue
images, and a red target and a blue target, and I want to be able to
drop red images only on the red target, and blue images only on the
blue target, is there a good way to do this, other than globally keep
track of which thing is being dragged?
I think I give a good example in my e-mail :
http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2010-August/027948.html
(do Ctrl+F "(function" to find it).
In this e-mail I talk about drag and drop and the fact that for the use
case where drag and drop operations occur within the same document, the
dataTransfer object is pointless in my opinion.
David
Thanks.
-Jason
On Mon, Aug 16, 2010 at 7:57 PM, Daniel Cheng <dch...@chromium.org
<mailto:dch...@chromium.org>> wrote:
I don't think anything in the spec should prevent that. dragenter
handlers attached to different drop targets can check
event.dataTransfer.types and decide if they want to accept the
drag or not.
That being said, do any operating systems actually support
multiple concurrent drags and drops? WebKit has some built-in
assumptions about there being no more than one drag-and-drop
operation (per page possibly--I can't test, since I don't have
access to a machine with multi-touch capabilities) and I would be
surprised if many other applications didn't have this limitation
as well.
Daniel
On Thu, Aug 12, 2010 at 16:26, Jason Gross
<jasongross9+ht...@gmail.com
<mailto:jasongross9%2bht...@gmail.com>> wrote:
Greetings,
The specification says that the dragenter event is "used to
determine whether or not the drop target is to accept the
drop". Do functions bound to this event get any information
about the object being dragged? In particular, is there a
good way to have N drop targets, and have each of them accept
only certain draggables? If not, it seems to me like a good
feature to have, especially as
multi-touch applications/devices become more prevalent.
Thanks.
Sincerely,
Jason Gross
