mainwindow does not refresh

[edb]

Indeed I was confused about the main thread and whether I had to create that or not, but it didn't work when I did not create a mainthread. I will remove this and start with the code you posted in the previous thread.

I still get these "XLib: unexpected async reply" errors. I have the feeling that the thread is not ended well. The lengthy process is executed well, but if I execute something in MyMDIMainWindow, the program does not respond anymore. I do not start mij lengthy process in MyMDIMainWindow, but from a widget that is placed in one of the dockwindows of the MyMDIMainWindow. Is this a problem?
I also do not delete the lengthyprocess thread. I probably should, but how? I post the ended thread event, but I never get in the customEvent function...

[edb]

One problem solved! My mistake. I overloaded the customEvent function instead of overriding it! Now the customEvent function is reached!

I used: customEvent(QEvent* e) instead of customEvent(QCustomEvent* e)

Concerning the xlib errors: I still got them. I will now try and remove all GUI related aspects from my thread and see what this will do. I have the feeling that interacting with the GUI from the thread causes this problem....

[Chicken Blood Machine]

One problem solved! My mistake. I overloaded the customEvent function instead of overriding it! Now the customEvent function is reached!

I used: customEvent(QEvent* e) instead of customEvent(QCustomEvent* e)

Sorry- my mistake, my example was wrong. I'll correct it now.

Concerning the xlib errors: I still got them. I will now try and remove all GUI related aspects from my thread and see what this will do. I have the feeling that interacting with the GUI from the thread causes this problem....

Of course. You cannot interact with the GUI whatsoever from another thread. That is what the customEvent mechanism is for. This is stated in the 'Thread Support in Qt' documentation. Did you read it?

http://doc.trolltech.com/3.3/threads.html