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Re: Blink does not plan to implement pointer events

From: François REMY <francois.remy.dev@outlook.com>
Date: Wed, 20 Aug 2014 23:47:23 +0200
Message-ID: <DUB130-DS153CAF28E4FEF9692925B6A5D20@phx.gbl>
To: "Arthur Stolyar" <nekr.fabula@gmail.com>
Cc: Scott González <scott.gonzalez@gmail.com>, "Rick Byers" <rbyers@chromium.org>, "Olli Pettay" <olli@pettay.fi>, <public-pointer-events@w3.org>
> | When pointer capture is set, pointerover, pointerout, pointerenter,
> | and pointerleave events are only generated when crossing the
> | boundary of the element that has capture as other elements can
> | no longer be targeted by the pointer. This has the effect of
> | suppressing these events on all other elements.
>
> And as I know that means that there still 'll be hit-testing after
> setPointerCapture because browser needs to know when pointer
> leaves/enters boundaries of captured element.

This is not a full hit-testing, though.

The major cost of hit-testing comes from the tunnelling from the viewport to 
the target element, here we are already at this element. 
Received on Wednesday, 20 August 2014 21:47:49 UTC

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