I do not want the standard widgest. How can I ceate own widgets? I want evaluate this for an industrial application.
There are many ways to create own widgets. You can subclass and modify existing ones, you can arrange different widgets using layouts, or subclass the basic QWidget and implement your own painting. Also, you can jump into a completely different environment, based on items, by using Qt Graphics View Framework. Lastly, there is Qt QUICK and QML.
All those can be mixed. Oh, and of course you can modify the looks using QSS and QStyle.
thank you very much, for your answer. I will try it, in the next days.