Bukkit/CraftBukkit — pull request #1049 by THDigi (2013-03-03 01:54:03+00:00)
Title: Added middle click option for InventoryClickEvent for BUKKIT-3692

Adds a way to detect middle clicks in InventoryClickEvent.

Bukkit PR: https://github.com/Bukkit/Bukkit/pull/786
Ticket: https://bukkit.atlassian.net/browse/BUKKIT-3692