How do I integrate PyQwt with the Qt Designer and Eric?
You have to install the Qwt library and the Qwt designer plugin. If you have built PyQwt against a shared Qwt library, the designer plugin is probably already installed. If you have built PyQwt against the slightly patched version of Qwt included in PyQwt, you can either install the included Qwt library (safest) or the official Qwt library matching PyQwt (PyQwt-4.2.x matches with Qwt-4.2.0 and PyQwt-5.0.x with Qwt-5.0.y). Make sure that the Qwt designer plugin is linked against the correct Qwt library.