KDE/QWT doubt on debian sarge

[Uwe]

To include QWT widgets, you should browse Google, but the most simple would be to write
your own Designer plugin for that purpose.
Check the Qt4 Designer docs
Guilugi.

Qwt comes with a designer plugin (Qt3 + Qt4). I don't use Debian myself, but I'm pretty sure, that all you have to do is to install the Debian packages. If you want to install Qwt from source code, the INSTALL file explains how to build and install the Qwt designer plugin.

Uwe