Using Widgets, Extending imshow

Hello,

Are there examples of extending imshow or further customizing any of
the UI components of matpotlib? Or anything you can point me at to
get started? I have been able to connect events to imshow. An
example of the type of thing I might want to do is to print the R,G,B
value in a status bar when I hover over an x y coordinate of an image.

···

--
Austin Godber