Sliding Panels

http://stackoverflow.com/questions/23785804/java-sliding-jpanels

http://stackoverflow.com/questions/11307884/trigger-jxcollapsiblepane-with-mouse-over

Swing Animation

http://www.aurelienribon.com/blog/projects/universal-tween-engine/
https://github.com/AurelienRibon/sliding-layout