RenderTopicThumbnail < Applications

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%TOC{depth="2"}%

---++ Documentation
%STARTSECTION{"documentation"}%
This function gets the first image attachment from a topic and creates
a 48x48 thumbnail using <nop>ImagePlugin. The attachment taken must end
with =jpeg, jpg, gif, bmp, svg or png=. If there are multiple image attachments
then the first one ordered by comment and name is taken. The empty string
is returned if no image attachment is found.

---+++++ Parameters
   * OBJECT: topic to generate a thumbnail for
   * ALIGN: optional alignment of image, defaults to right
   * SIZE: optional size of thumbnail
   * TYPE: image rendering type, see documentation of <nop>ImagePlugin, defaults to simple
   * CROP
   * SORT: specifies which image to chose from the attachments, defaults to =comment:name= which will take the one that sorts first wrt the comment, falling back to the name

%ENDSECTION{"documentation"}%

---++ Implementation
<verbatim class="tml">
%STARTINCLUDE%%ATTACHMENTS{
   "%OBJECT%"
   name=".*\.(jpe?g|gif|png|bmp|svg|JE?PG|GIF|PNG|BMP|SVG)"
   warn="off"
   limit="1"
   sort="%SORT{default="comment:name"}%"
   reverse="%IF{"'%SORT%' = 'date'" then="on" else="off"}%"
   hidenull="on"
   format="$percntIMAGE{
     \"$name\"
     topic=\"$web.$topic\"
     align=\"%ALIGN{default="right"}%\"
     type=\"%TYPE{default="simple"}%\"
     size=\"%SIZE{default="48x48>"}%\"
     crop=\"%CROP{default="northwest"}%\"
     title=\"\"
     tooltip=\"on\"
     warn=\"off\"
   }$percnt"
}%%STOPINCLUDE%
</verbatim>

---++ Test
%DBCALL{"%TOPIC%" 
  OBJECT="%WIKIUSERNAME%"
  ALIGN="left"
}%
%DBCALL{"%TOPIC%" 
  OBJECT="%WIKIUSERNAME%"
  SORT="date"
  ALIGN="left"
  SIZE="100x100"
}%
%CLEAR%

---++ List of all attachments at %WIKIUSERNAME%
<a name="sort"></a>
%ATTACHMENTS{
   "%WIKIUSERNAME%"
   name=".*\.(jpe?g|gif|png|JE?PG|GIF|PNG)"
   sort="%URLPARAM{"sort"}%"
   hidenull="on"
   header="| *#* | *Name* | *Date* | *Size*| *Comment* | *Image* |$n"
   format="| $index | <nop>$name | $date | $size | $comment | <img src='$url' width='50' /> |"
}%
</div>

%DBCALL{"Applications.RenderFunctionCallers"}%

---++ Copyright
&copy; 2006-2013 Michael Daum http://michaeldaumconsulting.com

%DBCALL{"Applications.GnuGeneralPublicLicense" section="notice"}%

ApplicationTopic edit

TopicType	DocuTopic, TopicFunction
TopicTitle
Summary	Display thumbnail image for a topic
WikiApplication	WikiWorkbench

Topic revision: r1 - 26 Apr 2013, micha

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