[gtkmm] differences in C GtkHScale and C++ Gtk::HScale specifically button_release and button_press events

[Todd Fisher <taf2 lehigh edu>]

I am working on a music playback application and am using the 
Gtk::HScale to represent the playback progress as well as providing the user
with a handle through which he or she can manipulate the position of the 
media.  I don't believe that this is as simple as just connecting
to the signal_value_changed() event ... as during playback i must 
continuouly update the value causing that signal to be called quiet 
frequently and
not really be useful for detecting changes in the slider position.  As a 
result I believe the correct way to capture the position independent of
its current changed value is to listen to the button_press/release 
events.  This is when i discovered a difference in the way 
button_press/release
signals are handled in Gtkmm and Gtk+ when used with a Scale widget.  
IMO Gtk+ is doing it correctly and this is a bug in Gtkmm, however i
decided to write two simple examples doing the same thing in both C and 
C++ to better express my point as well so the list could be the final judge.

also note i'm running redhat-9, with gtkmm2 rpms installed from 
freshrpms.net so, perhaps this is an old bug that has already be handled 
in any event
perhaps this code will help new comers to gtkmm from gtk+...

http://141.157.56.43/source/examples

-todd