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Subject: pan and zoom in 2.1
At 10:20 PM 9/3/2007 +0000, david.w.cruikshank@boeing.com wrote: >[...] >Rev 2 added the transparency issue View Document Details: >http://www.oasis-open.org/apps/org/workgroup/cgmo-webcgm/document.php?document_id=25179 >Download >Document: >http://www.oasis-open.org/apps/org/workgroup/cgmo-webcgm/download.php/25179/WebCGM_21_list_r2.html >Revision: This document is revision #2 of WebCGM_21_list.html. Under the animation section is listed, "2. generic pan and zoom inteface". I think we also discussed in Seattle, and as I recall there was some agreement that it would be useful: an interface to allow one to inquire object extents. The rationale went like this... For the zoom functionality to be useful, you must be able to specify the amount of zoom relative to the characteristics of your zoom target. There is a collection of 2.0 object behaviors that currently allow some imprecise, generic control of the post-execution view of a linkuri to an object. These could also be attached these to a new zoom-pan interface. But precise control is possible and easy -- instead or in addition to generic object-behavior-based zoom controls -- if one can inquire the extents, and then feed back that kind of info (e.g., "extents*1.075) as a zoom control. As a related aside, when I was researching the 1.0 and 2.0 errata, I came upon an unsatisfied object-behaviors need that was discussed during 2.0 development but not implemented in 2.0 -- the ability to specify the margin around the object for linkuri object-behavior zooming. Background: The script animations of Molly & Larry (demo'd and described) had one sequence where they zoomed in on a control panel dial, or something like that. Seattle attendees -- am I remembering our discussions correctly? Cheers, -Lofton.
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