Documentation

This function gets the first image attachment from a topic and creates a 48x48 thumbnail using 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 ImagePlugin, defaults to simple
• CROP
• TOOLTIP: switch on/off tooltips for thumbnails, defaults to on
• 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

Implementation

%STARTINCLUDE%%DBCALL{"Applications.RenderTopicThumbnail" 
  section="%IF{
     "'%ATTACHMENTS{"%OBJECT%" attr=".*t.*" format="yes"}%'='yes'" 
     then="thumbnailed" 
     else="defaultthumbnail"
  }%"
  object="%OBJECT%"
  align="%ALIGN{default="right"}%"
  size="%SIZE{default="48x48>^"}%"
  type="%TYPE{default="simple"}%"
  crop="%CROP{default="on"}%"
  sort="%SORT{default="comment:name"}%"
}%%STOPINCLUDE%

%STARTSECTION{"thumbnailed"}%%ATTACHMENTS{
   "%object%"
   attr=".*t.*"
   warn="off"
   hidenull="on"
   format="$percntIMAGE{
     \"$name\"
     topic=\"$web.$topic\"
     align=\"%align%\"
     type=\"%type%\"
     size=\"%size%\"
     crop=\"%crop%\"
     title=\"\"
     tooltip=\"%TOOLTIP{default="on"}%\"
     warn=\"off\"
     output=\"png\"
   }$percnt"
}%%ENDSECTION{"thumbnailed"}%

%STARTSECTION{"defaultthumbnail"}%%ATTACHMENTS{
   "%object%"
   name=".*\.(jpe?g|gif|png|bmp|svg|JE?PG|GIF|PNG|BMP|SVG)"
   warn="off"
   limit="1"
   sort="%sort%"
   reverse="%IF{"'%sort%' = 'date'" then="on" else="off"}%"
   hidenull="on"
   format="$percntIMAGE{
     \"$name\"
     topic=\"$web.$topic\"
     align=\"%align%\"
     type=\"%type%\"
     size=\"%size%\"
     crop=\"%crop%\"
     title=\"\"
     tooltip=\"%TOOLTIP{default="on"}%\"
     warn=\"off\"
     output=\"png\"
   }$percnt"
}%%ENDSECTION{"defaultthumbnail"}%

Test

List of all attachments at WikiGuest