MediaWiki and image gallery columns – mini-tutorial
Posted on March 16, 2009
I’m mainly noting this for posterity, because I couldn’t find a quick answer online and finally figured it out after a day or two.
Last year I setup a MediaWiki site for work to take the place of a site one of the resident’s had setup. The site’s overall look-and-feel has to comply with standards from the School of Medicine, and this year they’ve redesigned everything. I like the school’s new design concept, since the old one was starting to feel dated. Still, it takes work to convert a site from one theme to another.
The previous design took up almost the entire width of the browser window, which means MediaWiki could easily accommodate 6 columns of image thumbnails. The downside is it’s hard coded into the MediaWiki code. It’s a variable, but not one that’s documented. Normally, variables that are meant to be changed in MediaWiki are meant to be included in the LocalSettings.php file or the includes/DefaultSettings.php file. However, in the includes/ImageGallery.php file is $mPerRow = x; near the beginning of the file, where x is the number of columns. It can be set to whatever is appropriate, so I set it to 4 for the new layout.
The moral of the tutorial is that it pays to look in unusual places if you are hunting for some hidden variable.
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