MinecraftForge/MinecraftForge — pull request #1387 by DevPrice (2014-09-05 20:21:05+00:00)
Title: BlockPlacedEvent

An event that fires when a block is placed. This is really useful for reacting to blocks being placed in a cross-mod compatible manner. For instance, I wanted to create golems similar to iron golems, using a pumpkin, but with non-iron blocks. In this way, I can react to the pumpkin being placed rather than use another type of block or modify the pumpkin class in a way that destroys cross-compatibility.