In Qt, the GUI runs in its own thread and must be accessed from the main thread. If QWidget is created in a non-main thread, we can use the QMetaObject::invokeMethod() method to create it in the main thread.
In Qt, the GUI runs in its own thread and must be accessed from the main thread. If QWidget is created in a non-main thread, we can use the QMetaObject::invokeMethod() method to create it in the main thread.