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Re: "click" discrepancy in DOM L3 and SVG 1.2

From: Jon Ferraiolo <jon.ferraiolo@adobe.com>
Date: Mon, 14 Feb 2005 11:55:33 -0800
To: lists@jeffrafter.com, www-svg@w3.org
Message-id: <6.1.1.1.2.20050214115430.01fad080@mailsj-v1.corp.adobe.com>

Thanks for noticing this. My opinion is that the SVG 1.2 specs (Tiny and 
Full) should adopt the DOM L3 wording either by reference or copy/paste.

Jon Ferraiolo
Adobe Systems, Inc.
Member SVG WG

At 11:13 AM 2/14/2005, Jeff Rafter wrote:

>In SVG 1.2 "click" is described as:
>
>"Occurs when the pointing device button is clicked over an element. A 
>click is defined as a mousedown and mouseup over the same screen location. 
>The sequence of these events is: mousedown, mouseup, click. If multiple 
>clicks occur at the same screen location, the sequence repeats with the 
>detail attribute incrementing with each repetition." [1]
>
>However, in DOM L3 it is described as:
>
>"A pointing device button is clicked over an element. The definition of a 
>click depends on the environment configuration; i.e. may depend on the 
>screen location or the delay between the press and release of the pointing 
>device button. In any case, the target node must be the same between the 
>mousedown, mouseup, and click. The sequence of these events is: 
>[mousedown], [mouseup], and [click]. Note that, given the definition of a 
>click, If one or more of the event types [mouseover], [mousemove], and 
>[mouseout] occur between the press and release of the pointing device 
>button, the event type [click] cannot occur. In the case of nested 
>elements, this event type is always targeted at the most deeply nested 
>element." [2, namespaces shortened for readability]
>
>The important differences here are that the mousedown, mouseup must be on 
>the same node (which is new in DOM L3), and that the sequence cannot be 
>interrupted with additional events. Neither Batik nor ASV6 adhere to these 
>constraints. It appears that both limit the "screen location" to a 4x4 
>pixel area, but ASV6 allows multiple intermediate mousemove events, and 
>either allows you to mousedown on one node and mouseup on another-- still 
>producing a "click".
>
>[1] http://www.w3.org/TR/SVG12/eventlist.html
>[2] http://www.w3.org/TR/DOM-Level-3-Events/events.html#event-click
>
>Thanks for any clarification,
>Jeff Rafter
Received on Monday, 14 February 2005 20:04:53 UTC

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