re[2]: [cgmo-webcgm] Problem with OBJECT and PARAM tags

[Don Larson <dlarson@cgmlarson.com>]

Lofton,

 >  +1 to Benoit's question.
 >
 >  Could we now please hear from everyone who has experience with this issue?
 >  Vendors and users?
 >
 >  It appears that we are going to need to find a way forward -- either a
 >  workaround, or a quick addendum to the standard, or cascaded profile, or
 >  ...
 >
 >  Don, is there a reason that you choose 'src' as the param name? I have
 >  seen it used before in proprietary extensions. (Maybe it is just the
 >  obvious choice, but I'm wondering if it shows up in any published
 >  examples.)
 >

 

We have used SRC starting with our first WebCGM 1.0 implementation

since what works on all the WebCGM 1.0 and 2.0 tests too.

 

It's interesting to note that all of the WebCGM 1.0 tests use src= "to" pass

the cgm file name and not 'data'.

 

I have always though that SRC was a valid PARAM keyword in WebCGM 1.0 but

after quick reivew of the 1.0 spec, I see that I was mistaken.

http://www.w3.org/TR/REC-WebCGM/REC-03-CGM-IC.html#webcgm_3_4

 

 

Don.

 >  -Lofton.
 >
 >  At 10:41 AM 6/1/2010 -0400, Bezaire, Benoit wrote:
 >
 >  May I ask why this knowledge wasn t shared with the group? We could (for
 >  example) have standardized the src param in WebCGM 2.1
 >
 >  From: Don Larson [mailto:dlarson@cgmlarson.com]
 >  Sent: Tuesday, June 01, 2010 10:25 AM
 >  To: Bezaire, Benoit; cgmo-webcgm@lists.oasis-open.org
 >  Subject: re: [cgmo-webcgm] Problem with OBJECT and PARAM tags
 >
 >  Benoit
 >
 >  >
 >  > Hi All,
 >  >
 >  > It has come to our attention that IE has a limitation related to the
 >  > <object> data attribute and <PARAM> elements. Our implementation
 >  > (COleControl ActiveX) is passed in corrupted data when both the data
 >  > attribute is specified on the <object> tag and when <PARAM> elements are
 >  > also specified.
 >  >
 >  > According to Microsoft, HTML 4 doesn t state that an implementation (of
 >  > HTML) has to pass all values ( data attribute, <PARAM>s) simultaneously
 >  > to the ActiveX. Either data without <PARAM> is used; or <PARAM>s without
 >  > the data attribute is used.
 >  >
 >  > Which means that WebCGM s example (shown below) doesn t work with a
 >  > standard ActiveX implementation:
 >  > <script type="application/ecmascript"> <![CDATA[
 >  > function myHandler(evt)
 >  > {
 >  > // performs DOM manipulation calls...
 >  > }
 >  > ]]>
 >  > </script>
 >  > [...]
 >  > <object data="javascript:void(0);" type="image/cgm;Version=4;ProfileId=WebCGM"
 >  > width="200" height="100">
 >  > <param name="onload" value="myHandler(evt);"/>
 >  > </object>
 >  >
 >  > Are other Windows vendors aware of this? Do other vendors use
 >  > DoPropExchange to get the <PARAM>s?
 >  >
 >
 >  We are somewhat aware of problem in using "DATA" to get the cgm file
 >  stream.
 >
 >  We are still using DoPropExchange to get cgm file via PARAM and SRC
 >  keyword.
 >
 >  > There is possibly a workaround that can be implemented in ActiveX
 >  > implementation (not tested yet), but that being said, maybe we want to
 >  put
 >  > some thoughts in how to use the OBJECT tag in a properly supported IE
 >  way.
 >  >
 >
 >  > Regards,
 >  > Benoit
 >  >
 >
 >  Regards,
 >  Don Larson
 >  Larson Software Technology
 >  Tel: (713)977.4177 ext. 102
 >  www.cgmlarson.com