Wrapping a custom widget

[Robert Pearce <rob bdt-home demon co uk>]

Guys,

Here's that other question I referred to:

I have an application written in C using Gtk. I would like to port it to 
C++ with Gtkmm (because it already wants to share several bits of low 
level code with another application that's written with Gtkmm). However, 
this C application incorporates a couple of custom Gtk widgets that I've 
written.

So my question is, what's the best way to wrap a custom C/Gtk widget 
into a C++/Gtkmm class?

(Incase anyone cares, the widgets are a "lamp" - like GtkButton but not 
sensitive to mouse events - and a very much enhanced version of the 
GtkDial example)
--
Rob Pearce                       http://www.bdt-home.demon.co.uk

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