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

[Don Larson <dlarson@cgmlarson.com>]

 

Benoit

 

It was shared with group.

 

I remember a telecon during webcgm 2.0 phase in which I related this to group.

 

 

Don.

 >
 >  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 ofproblem in using"DATA" to get the cgmfile stream.
 >
 >  We are still using DoPropExchange to getcgm file viaPARAM 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