JavaFX Scala GUI thumbnail browser.
Works with large directories.
Double click Browse to a directory
Right click Open image under pointer full size, any key to close
Arrows / Wheel Scroll up and down
+ / - Make thumbnails larger / smaller
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https://github.com/google/guava For caching.
https://github.com/haraldk/TwelveMonkeys Awesome easy as pie plugins and extensions for Java ImageIO.
TODO: Maybe a smooth scroll. Work out where the columnar oddness at some sizes comes from on Windows 10.
sbt assembly to build an executable JAR, a bit fatter due to FX modules.