safeexec | safe executor for programming contest auto judge system | Game Engine library

I have this working, but I am having trouble editing the content of the Dialog

You can add ui files in your project:

Using that option Qt Creator will make a class with cpp and h files and a ui file in which you can add other widgets as you're used to. use the import directives to use your class where you need it like you did in the code above and you will have your ui file available. Then connect the clicked signal of your button with the slot of your dialog class. You can do that in the constructor of the class that holds the button.

You can read this approach more in detail in the book C++ GUI Programming with Qt 4 on chapter 2 : Creating Dialogs. It is available for free on the web. It uses Qt4, but in Qt5 it works the same way around.

EDIT: Here is a minimal example that shows you where you can use the needed parts: a mainwindow with a button on it (in the ui file). a Dialog class which also has a ui file (with several widgets on it). When clicking the button on the mainwindow, the dialog form is shown. Thjs is what I asked you for before. It makes it easier to communicate / test.

pro file