QThread execution freezes my GUI

Question

I\'m new to multithread programming. I wrote this simple multi thread program with Qt. But when I run this program it freezes my GUI and when I click inside my widow, it res

Answer 1

But when I run this program it freezes my GUI and when I click inside my window, it responds that your program is not responding.

Yes because IMO you're doing too much work in thread that it exhausts CPU. Generally program is not responding message pops up when process show no progress in handling application event queue requests. In your case this happens.

So in this case you should find a way to divide the work. Just for the sake of example say, thread runs in chunks of 100 and repeat the thread till it completes 10000000.

Also you should have look at QCoreApplication::processEvents() when you're performing a lengthy operation.