Qwt (GUI Components & utility for programs with technical background)
The Qwt library contains GUI Components and utility classes which are
primarily useful for programs with a technical background. Beside a
2D plot widget it provides scales, sliders, dials, compasses,
thermometers, wheels and knobs to control or display values, arrays,
or ranges of type double.
Qwt 5 is a legacy version of Qwt, but it is still used by some
applications.
NOTE: You can install qwt5 and qwt (Qwt 6.x) simultaneously in Slackware.
qwt5.SlackBuild was written in a way that avoid any conflict with qwt
by applying a patch in the 'qwtconfig.pri' file and by removing qwt5 man
pages.