I have the same problem and it's a nightmare already finding the wright java is hard, there is only the versions 1.4.(thingy) but no 1.5.(thingy) it could of been kind of the author to of put the installer of the version he uses
I still can't get it to function... looked through the src/qtterminal/embed_example file.cpp, but the problem lies in not knowing how to use those classes—QtGnuplotWidget and QtGnuplotInstance—from a different QT programme. Any assistance would be greatly valued.