Accessing mainwindow from another class

[tiegert]

Hello guy's,

i have tried to include the mainwindow header to another class, lets call that class A, and from that class A then add a dock to the main window.

The problem is, that mainwindow already uses class A and has its header file included. So i get a circular dependency.

If i use forward declaration in class A and type "class MainWindow;" i can not really use any functions of the main window class in class A.

Is there someone with the same problem, or does someone have a solution on how to access the mainwindow class without a circular dependency?

Thanks a lot
Michael

[SGaist]

Hi,

If you want to communicate with your main window, use signals and slots.

The fact that you start to have circular dependencies of that kind in a GUI application hints at an architectural issue.

[JonB]

@tiegert said in Accessing mainwindow from another class:

i have tried to include the mainwindow header to another class

Why? Don't. And then your issue will go away.

[tiegert]

@JonB how can i then access the main window class?

I used something like MainWindow::addDockWidget(...) to add a dock to the main window.

If i don't include the header how can i access the mainwindow class?

[SGaist]

Hi,

If you want to communicate with your main window, use signals and slots.

The fact that you start to have circular dependencies of that kind in a GUI application hints at an architectural issue.

[tiegert]

@SGaist i did change a few things in the structure and now with signals and slots it works, thanks for the hint.