I only just found QCustomPlot a couple of weeks ago. I've been using Qwt for years and have become frustrated with the development architecture of Qwt 6.x. So I gave QCustomPlot a try and found the interaction to be fantastic. As a demonstrator I have developed an example ChartManager that sits over the top of QCustomPlot and has a context sensitive interactive toolbar to allow editing of titles, axes, and graphs. I'd like to provide you with the source code so that you can use whatever you like from it, or just add it as an extra example. Do you have somewhere I can post/email the source code?