pollEvent takes too long to respond on keyRelease Event

[nikoloz]

I have a multiplayer_game class in my game, which is responsible for playing that game between two players. After pressing the Escape button, I want to go instantly back to the choose_player window, where you can choose the game mode(singleplayer/multiplayer). To do that, I'm using this code :

        sf::Event event;

   while (window->pollEvent(event))
   {
      if ((event.type == sf::Event::KeyReleased) && (event.key.code == sf::Keyboard::Escape))
      {
         coreState.SetState(new choose_player);
      }
   }
       
       The problem is, hitting the escape button doesn't always respond (most of the time it takes me back to the choose_player mode,but  sometimes several pressing on the escape is necessary).

[Laurent]

This is not supposed to happen.

What's your OS? Can you reproduce it on other PCs? Do you have other event loops in your code? Can you reproduce the problem with a minimal code (ie. just an event loop that prints something when escape is released)?

[nikoloz]

I've got another event loop in the source.cpp file, I'll provide a code snippet here: https://codepad.co/snippet/np8kumZc#   

I copied the multiplayer_game.cpp event loop in the source.cpp main while loop to test and it worked perfect. I guess it has something to do with the fact that I'm passing a pointer to the window object in the multiplayer_game.cpp, I just don't understand why or how it affects the program.

[Laurent]

It's just that events retrieved in one event loop won't be seen in the other... so you're missing events in both event loops. You should really just have one event loop, and then manage to dispatch events to whoever needs to process them.

[nikoloz]

Thank you.