I have been writing small thumbnailers for the filemanager Thunar
(http://thunar.xfce.org/index.html). I like the way Thunar uses a
.desktop file to invoke external programs and scripts (like 'convert'
from imagemagick) to generate the thumbnails for various formats. How
this works is detailed at:
http://thunar.xfce.org/documentation/C/customizing-thunar.html#thumbnailers.
A lot of programs generate thumbnails these days, and there exists a
clear standard as to where these thumbnails should be placed so that
different applications can share thumbnails. However there is no such
standard for thumbnailers: different applications each come with there
own host of small thumbnailer applications.
The thumbnailers for Thunar register themselves with Thunar by
installing a .desktop file under /usr/local/share/thumbnailers. This
contains a special key like:
X-Thumbnailer-Exec=/usr/local/bin/eps-thumbnailer %i %o %s
where %i is the input file, %o the output file, and %s the size of the
output. This is explained in more detail in the link above.
This seems to me to be a very good system - I am wondering if it, or
something similar, could be used as a standard to allow applications to
share thumbnailers?
Here are some links to relevant posts on the Tracker search tool
(http://www.tracker-project.org/) mailing list:
http://mail.gnome.org/archives/tracker-list/2007-January/msg00032.html
http://mail.gnome.org/archives/tracker-list/2007-January/msg00031.html
http://mail.gnome.org/archives/tracker-list/2007-January/msg00029.html
Erlend
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