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Subject: RE: [cgmo-webcgm] Problem with OBJECT and PARAM tags


+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.)

-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=""xxx.cgm"" 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


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