C++ QT Creator Sleep/Pause

C++ QT Creator Sleep/Pause

How do I "Sleep/Pause" inside Qt Creator.
I want the UI to remain responsive while the code is sleeping.
while(Tablet.IsConnected() == false){
LogText("[Prep] Tablet not turned back on... Retrying...");
//Sleep for three seconds here
}
LogText("[Prep] Tablet Detected!");
ELI5 - I`m new to QT.