setCapture/releaseCapture/onlosecapture 
https://bugs.webkit.org/show_bug.cgi?id=27330
Summary setCapture/releaseCapture/onlosecapture
Ben Goodger
Reported 2009-07-15 22:02:49 PDT
It'd be useful for a JavaScript framework I'm developing if WebKit would implement the IE-specific setCapture/releaseCapture functions and the "losecapture" event. These functions basically route all subsequent mouse events to an object until capture is lost. It is a fairly standard part of an OS UI toolkit, I believe the IE implementation is intended to clone the Windows API SetCapture/ReleaseCapture methods. Gtk has a similar concept called "grab". See http://msdn.microsoft.com/en-us/library/ms536742(VS.85).aspx for more information. Forgive me if this has already been discussed, I couldn't find anything in the bug system.
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Erik Arvidsson
Comment 1 2009-07-16 09:15:19 PDT
I agree with Ben that this is really useful. Getting dragging to behave sane in the presence of iframes, windowed plugins and handling mouse releases outside the window is something 9 out of 10 web apps fail to do correctly today. It also simplifies the event handling code a js author needs to write since they only have to listen to the initial target.
Ojan Vafai
Comment 2 2009-07-16 09:36:46 PDT
Relevant public-webapps thread: http://www.mail-archive.com/public-webapps@w3.org/msg01512.html Ben, Erik, what do you think about Hixie's comment: "Note that I don't think we'd need releaseCapture(); we should just say that capture is canceled when the mouse is released if it was captured. This gets around the problem of unbalanced set/release."
Erik Arvidsson
Comment 3 2009-07-16 10:54:51 PDT
(In reply to comment #2) > Relevant public-webapps thread: > http://www.mail-archive.com/public-webapps@w3.org/msg01512.html > > Ben, Erik, what do you think about Hixie's comment: > "Note that I don't think we'd need releaseCapture(); we should just say > that capture is canceled when the mouse is released if it was captured. > This gets around the problem of unbalanced set/release." I think Hixie has a point but I don't think we should diverge from IE's API. It is just not worth it
Erik Arvidsson
Comment 4 2009-10-20 17:50:30 PDT
Firefox just added this.
Jeremy
Comment 5 2011-10-19 01:48:14 PDT
Any movement on this? ETA?
Bronislav Klucka
Comment 6 2012-03-18 01:29:09 PDT
Any movement on this?
Bronislav Klucka
Comment 7 2012-05-11 02:28:44 PDT
ANY plans here?
Bronislav Klucka
Comment 8 2013-03-04 20:16:37 PST
hi, any news?
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