This isn't technically a "canvas library". It is a library that abstracts graphics functionality. Canvas can be used as one implementation. However it appears that Canvas doesn't support events (at least in this library).

API: http://api.dojotoolkit.org/jsdoc/dojox/1.2/dojox.gfx

Index of demos: http://archive.dojotoolkit.org/nightly/dojotoolkit/dojox/gfx/demos/

Older links

http://dojotoolkit.org/book/dojo-book-0-9/part-5-dojox/dojox-gfx http://dojotoolkit.org/book/dojo-book-0-9/part-3-programmatic-dijit-and-dojo/drawing-gfx