1. Is it customary to make the prototype of the default implementation of
a virtual method available in the header file of a gobject?
2. How does one know if a method is pure virtual if only the header file can be
viewed,
since the NULL assignment occurs in the init method implementation?
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I am trying to understand how to make individual widgets in GTK
transparent, like how it is done in gnome-terminal, as opposed to
setting the opacity of an entire heirarchy via set_opacity ().
All the examples demonstrating transparent widgets use a cairo canvas
and require that you perform a
