Managing the events received from the user is a really important topic. SFML provides us with two different approaches. The first is by polling the events received from a sf::Window instance, and the other is by checking the state in real time of an entry.
First of all, what is an event?
Generally, an event is an object that is triggered when something changes/happens. They are OS-dependent, but SFML provides us with a nice object to handle them in an OS-independent way. This is the sf::Event class. This class deals with a vast number of events, as follows:
Windows contains four different kinds of events. They are as follows:
Close
Resize
Gain/lose focus
The mouse pointer goes in/out of the window
There are three events for the mouse. They are as follows:
Move
Key press/release
Wheel press, release, or move
The keyboard contains two events. They are as follows:
Keys press/release
Text entered
The joystick is also managed with four events. They are as follows:
Connected/disconnected
Move...