3.x vs 2.x Gtkrc Widget Properties / Syntax

[kenton wilson gmail com]

Hi,

I believe I read recently that Gtkmm 3.x started using CSS type style
sheet syntax to control widget properties as a replacement for the 2.x
notation / syntax. Is the 3.x release backwards compatible with the
older 2.x syntax. (i.e. will Gtkmm3 still support 2.x syntax for at
least the 2.x widgets such that my 2.x code could be compiled against
Gtkmm3 without making any changes to either the 2.x source or gtkrc
file?)

TIA,
Kenton