ericdrowell/KineticJS — pull request #451 by urandom (2013-05-15 15:02:30+00:00)
Title: Limit the draggable behaviour to a specified mouse button

Add a Node attribute - dragButton - to specify the button with which drag-and-drop is allowed. The value is an integer, with the same value as the jQuery event.which property - 1 for left, 2 for middle and 3 for right.