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Le 17/08/2010 02:04, Jason Gross a écrit :
<blockquote
cite="mid:AANLkTim1i5c5ZhrFMPR7+KyYfJy6it2GpdLX_dM3-Cuk@mail.gmail.com"
type="cite">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?<br>
</blockquote>
I think I give a good example in my e-mail :
<a class="moz-txt-link-freetext" href="http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2010-August/027948.html">http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2010-August/027948.html</a>
(do Ctrl+F "(function" to find it).<br>
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.<br>
<br>
David<br>
<br>
<blockquote
cite="mid:AANLkTim1i5c5ZhrFMPR7+KyYfJy6it2GpdLX_dM3-Cuk@mail.gmail.com"
type="cite">Thanks.<br>
<br>
-Jason<br>
<br>
<div class="gmail_quote">On Mon, Aug 16, 2010 at 7:57 PM, Daniel
Cheng <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:dcheng@chromium.org">dcheng@chromium.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><font
face="arial,helvetica,sans-serif">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.</font>
<div><font face="arial, helvetica, sans-serif"><br>
</font></div>
<div><font face="arial, helvetica, sans-serif">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.<br>
</font>
<div>
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<div><font face="arial,helvetica,sans-serif"><br>
</font></div>
<div><font face="arial,helvetica,sans-serif">Daniel<br>
</font>
<div>
<div class="h5"><br>
<div class="gmail_quote">On Thu, Aug 12, 2010 at 16:26, Jason Gross
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jasongross9%2Bhtml5@gmail.com" target="_blank">jasongross9+html5@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><span
style="font-family: arial,sans-serif; font-size: 13px; border-collapse: collapse;">Greetings,
<div>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.</div>
<div>Thanks.</div>
<div><br>
</div>
<div>Sincerely,</div>
<div>Jason Gross</div>
</span></blockquote>
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