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RE: SVG12: wheelDelta should be UIEvent.detail

From: Scott Hayman <shayman@rim.com>
Date: Tue, 8 Aug 2006 13:23:23 -0400
Message-ID: <1CA55DCF91707745A9B5091A303367E906485252@XCH43YKF.rim.net>
To: "Bjoern Hoehrmann" <derhoermi@gmx.net>
Cc: <www-svg@w3.org>

Hi Bjoern,

> From: Bjoern Hoehrmann [mailto:derhoermi@gmx.net] 

> * Scott Hayman wrote:
> >My comment was based upon the fact that the 'detail' attribute of 
> >MouseEvent from DOM Level 2 [1] "indicates the number of 
> times a mouse 
> >button has been pressed and released over the same screen location 
> >during a user action".  As such, this attribute cannot be 
> used by any 
> >event that inherits from MouseEvent.
> 
> It depends on the event type what context information is made 
> available through the event object; the SVG Tiny 1.2 draft 
> does not require imple- mentations in any way to make 
> available information about mouse presses and releases 
> available through SVGMousewheel event objects, especially not 
> through UIEvent.detail. In terms of the DOM Event model, the 
> .detail attribute is not in use for such event objects. The 
> introduction of the .wheelDelta attribute is, therefore, 
> completely unnecessary.

It seems odd to me, and here I am speaking on my own behalf and not that
of the WG, that an event that inherits from MouseEvent could re-use the
'detail' attribute for something other than what it is specified for by
MouseEvent.  I would think that this would be more confusing than
introducing a new attribute.

> If you think this is somehow unclear from the DOM Level 3 
> Events draft, please make your case on the public-webapi 
> mailing list; I can then see how to make this yet more 
> obvious in the document; though note that the text you cite 
> is no longer part of the DOM Events specification.

So the 'detail' attribute of MouseEvent in the DOM Level 3 Events spec
no longer contains the information about the number of button presses?
Isn't this a backwards compatibility issue?

Scott



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Received on Tuesday, 8 August 2006 17:23:46 GMT

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