Edit Question - KnowledgeHub

Title Body

There is something I do not understand about Qt Designer . I have been working with it for a while now, and still I always end up editing the .ui files manually. As it can be seen in every single tutorial on Qt, one of the very first thing you do when you create a GUI is to subclass QMainWindow - in order to catch and redefine the closeEvent() function, for example. However, it is not possible to subclass ("promote") QMainWindow in Qt Designer - you can do it with many other class, but not this one. What I usually do is edit the .ui file and change: <class>MainWindow</class> <widget class="QMainWindow" name="MainWindow"> by: < widget class="MyMainWindow" name="MainWindow"> So that my code can subclass QMainWindow properly in my code: class MyMainWindow(QMainWindow, object): ''' I can redefine closeEvent here! ''' Obviously, this is weird - and I probably miss something about the right way to do it with Designer. But I cannot find any explanation. Why is it not possible to subclass QMainWindow in Designer, or how to structure my application differently to avoid the need for it? Thanks

Tags (comma-separated) Cancel