Quote Originally Posted by wysota View Post
No, it's not possible. You can operate on widget from the main thread only. You have to use events or signals to transfer widget related data across threads.
thanks for fast reply.

I must say I was reading widgets in threads by just using pointers, as mentioned before, but any modification such as widget->setValue was made in main thread using signals slots. I haven't noticed any error or crush of my apps so far using this "method" of accessing widgets. There is no word about reading widgets "this way" in qt documentation, nor strict forbidding this.