Difference between revisions of "User:Arielch/KDE Thumbnail plugin"

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The plug-in has its page on KDE-Look.org:
The plug-in has its page on KDE-Look.org:
[http://www.kde-look.org/content/show.php/OpenOffice.org+Thumbnail+plugin?content=110864 http://www.kde-look.org/content/show.php/OpenOffice.org+Thumbnail+plugin?content=110864]
[http://kde-apps.org/content/show.php?content=110864 http://kde-apps.org/content/show.php?content=110864]

Latest revision as of 23:34, 22 January 2010

While OpenOffice.org has internal support in the Windows desktop integration for the system file browser, providing thumb previews of OpenOffice.org files (see source code), such a feature is completely missing in its KDE integration.

The idea here is to develop a plug-in for KDE file managers (Dolphin and Konqueror) to preview OpenOffice.org files (Open Document Format) as thumbnails. Although this could be integrated into OpenOffice.org source code (now that there is a KDE 4 integration: see issue 103283), I find it better to distribute the plug-in as a KDE extension, because it is developed using only the KDE API, and so it does not need OpenOffice.org to be installed for it to work.

ODF file thumbnailer for KDE, working on KDE 4.3 Dolphin


  • the plug-in only works for Open Document Format files (the default file format since OpenOffice.org 2), not the old binary file format
  • the plug-in only creates a thumbnail when the OpenOffice.org document already has a thumbnail file (ODF files are zip files, the plug-in searches for the Thumbnails/thumbnail.png file inside it). This means that there is no thumbnail preview for OpenOffice.org Base files (or in case the ODF file has no Thumbnails/thumbnail.png, or the thumbnail.png is corrupted)
  • when the document is digitally signed, the plug-in reflects this fact by painting a signet on the upper right corner of the thumbnail. This is done slightly different from the way OpenOffice.org does it in its Windows integration:

Preview of a digitally signed file on Windows file browser

Preview of a digitally signed files on KDE 4.3 Dolphin

Notice that there is no check at all about the digital sign validity: the plug-in only looks for a META-INF/documentsignatures.xml file, which only indicates that the document is signed.

  • transparency is handled properly by removing the alpha channel (Note that although I thought it was an OpenOffice.org feature, the transparency on the thumbnail.png file is a bug: see issue). The plug-in will keep the check for alpha channel so that it can work with old files created before the issue fix.

Where to download

The plug-in has its page on KDE-Look.org:


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