I started to create simple js game using [pixijs](https://www.google.ru/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjhsKCtgpbMAhWjQJoKHdUhA-0QFggbMAA&url=http%3A%2F%2Fwww.pixijs.com%2F&usg=AFQjCNFczp7PxTX24cVaRoVCbzouLzs4ag&sig2=uSPDkzzMjiJVKLFmLZUAnw&bvm=bv.119745492,d.bGs). I need drag'n'drop functionality for Graphics circle but can't find info for this. I see only [this example](http://pixijs.github.io/examples/index.html?s=demos&f=dragging.js&title=Dragging) with sprites.