#GtkThemingEngine was the object used for rendering themed content
in GTK+ widgets. It used to allow overriding GTK+'s default
implementation of rendering functions by allowing engines to be
loaded as modules.
#GtkThemingEngine has been deprecated in GTK+ 3.14 and will be
ignored for rendering. The advancements in CSS theming are good
enough to allow themers to achieve their goals without the need
to modify source code.
#GtkThemingEngine was the object used for rendering themed content in GTK+ widgets. It used to allow overriding GTK+'s default implementation of rendering functions by allowing engines to be loaded as modules.
#GtkThemingEngine has been deprecated in GTK+ 3.14 and will be ignored for rendering. The advancements in CSS theming are good enough to allow themers to achieve their goals without the need to modify source code.