I use the QTimer::singleShot function to delay for some seconds. If, that's the only thing, I set
the SLOT parameter to NULL. Otherwise, I pass a SLOT function to it.

As I checked the program, I think, the SingleShot function does not wait till the time pass and then carry on with
the rest of the instructions. could you tell me how I can accomplish that? knowing that I cannot use the sleep() function at all as it would
suspend all processes.

Your