Message-ID: <4226747F.6080607 at rftp.com>
Date: Wed, 02 Mar 2005 18:20:47 -0800
From: Robert Roessler <robertr at rftp.com>
Organization: Robert's High-performance Software
MIME-Version: 1.0
To: lablgtk at math.nagoya-u.ac.jp
Subject: Which widget to use
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I have seen suggestions both on and off the list to use GObj.widget 
for inheritance purposes when creating OCaml-level [new] widgets... 
but there are other choices, and any insights into which of the widget 
classes is intended to be used under which circumstances would be 
helpful. :)

So, we have GObj.widget, GObj.widget_impl, and GObj.widget_full.

I note that all three are related, with the two others deriving from 
widget.  I see widget_impl is a parameterized class (similar to a C++ 
templated class?), while widget_full is not.  So, using widget_impl, 
you get to nail down the constructor parameter type more explicitly? 
But widget_full has the whole "connect" grouping of signals, while 
widget_impl does not...

In addition, a number of existing LablGTK widgets use widget_impl.

Presumably, the three different classes exist for a reason - unless 
they just represent historical artifact?

Robert Roessler
robertr@rftp.com
http://www.rftp.com