Hi,
I believe it is not currently possible to change the toolbar in a
backend independent manner. I do agree it would be a nice feature
though.
I think it would be possible to change the toolbar without embedding
with a syntax not all that different from the one you suggest.
In the figure window,
Dear all,
I am working on a custom toolbar with annotation tools (such as arrows, text
etc.) which would be a replacement or addition to the standard navigation
toolbar usually available at the bottom of the figure window.
So far in order to add the toolbar I use the example embedding_in_gtk2.