Quote Originally Posted by d_stranz View Post
OK, but what is more important to you? Getting your app to work and do what you want it to, or spending a lot of time writing a plotting widget that already exists? You -are- learning something, that's true, but it sounds like it is frustrating.
well, honestly actually both. It's rather like a game for me, not really anything annoying.

Building Qwt is easy. I don't know what platform you are on, but just use the .pro file with qmake. Any of the Qwt example programs will show you how to incorporate it into your own app.
XP. But I thing I will open a new thread for this topic as it is not the question of using any "qpainting" device.