p.s. Re: [cgmo-webcgm] Tests for substrings and getting extents

[Lofton Henderson <lofton@rockynet.com>]

At 01:49 PM 7/20/2008 -0600, Lofton Henderson wrote:
>Hi Stuart,
>
>I need some clarification about some of your test proposals.  (The session 
>notes don't have much besides your original email proposal, below).

My bad ... I missed the bit in the session notes about "requires null 
strings".  So you can ignore that section of my questions/comments.

-Lofton.


>At 01:36 PM 7/15/2008 -0700, Galt, Stuart A wrote:
>>Substring hotspots:
>>------------------
>>CGM will contain 3 text strings
>>
>>         link first first first
>>         middle link middle
>>         last last last link
>>
>>- if the image displays then open APS in TOS works
>>- test screentip values
>>- check links work
>>- Add a button that uses one of the links as a target
>>- get the APSExtent of a link
>
>So you're proposing that all substring APS tests will be in a single file, 
>with HTML/script driver to exercise the various subtests?
>
>I see that the session notes suggest that the APS Extent part should be in 
>a different test.  (Question:  do people think that APS extent on a 
>substring is useful, i.e., does it have a common use case?  I'm just 
>curious -- since these substring APS are not transformable or movable, 
>that eliminates some of the use cases of getExtent().)
>
>
>>If there are problems with the begining and final substrings
>>then test will be separated into "middle" and the first/last test.
>
>I'm unclear about the string structure you are proposing.  As I recall, 
>when we made the corrigendum to CGM:1999, we wrote it in such a way that 
>only *middle* substrings could be APS-enclosed.  If you want to put an APS 
>on the first word of a string, then you need an empty substring to precede 
>it, and then the APS around the first word.  Similarly for final.
>
>Do you recall this as well?  We did it because it made the Formal Grammar 
>*much* cleaner;  or alternatively, we estimated that the much uglier and 
>more extensive grammar changes otherwise might raise concerns about the 
>corrigendum amongst the ISO folks.
>
>(I just checked the grammar in the PDF of the corrigendum, and I think my 
>recollection is correct:
>http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50315 
>)
>
>
>>Object Extents:
>>--------------
>>CGM will contain a few simple geometric shapes, and empty
>>APS, and and APS that contains just a restricted text string.
>>
>>
>>- Get the object Extents of two of the objects
>>- move ObjectA to align with ObjectB and get extents of ObjectA
>
>When you say "move", you mean applying a 'translate' transformation?
>
>>- Get the extents of an empty APS
>>- Get the extents of the APS containing text.
>
>All for now,
>-Lofton.
>
>
>
>
>
>
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