is a good plugin for dataflow programming in Qt?

[stackprogramer]

i want to start a project in data flow programming in Qt,i saw this example in Qt,

The Diagram Scene Example

Elastic Nodes Example

i need adding a object to graphicview,my objects has number n input,m output ,i want to easily defining,
upper projects not have this ability.n input m output ...
i see this link
https://forum.qt.io/topic/18472/dataflow-programming-gui/6
this project i couldn't used . it has some error.
has anyone experience data flow programming in Qt?

[stackprogramer]

it is answered in http://forum.qt.io/topic/64391/is-there-a-widget-dataflow-programming-inqt-commercial
thanks