eseménykezelési

Eseménykezelés, in English event handling, is a fundamental concept in computer programming that deals with how programs respond to user interactions or other stimuli. These stimuli, known as events, can originate from various sources, including keyboard presses, mouse movements, network messages, or internal program states. When an event occurs, the program needs a mechanism to detect it and then execute specific code, often referred to as an event handler or event listener, to address it.

The process typically involves registering a function or method to be called when a particular event happens. For instance, in a graphical user interface (GUI) application, clicking a button generates a click event. The program would have an event handler associated with that button's click event, which would then perform a predefined action, such as opening a dialog box or submitting a form. This reactive nature is crucial for creating interactive and dynamic applications.

Different programming languages and frameworks offer various ways to implement event handling. Some use a direct callback mechanism where a function is passed as an argument to be executed later. Others employ an observer pattern where objects can subscribe to events and be notified when they occur. Understanding event handling is essential for developing responsive and user-friendly software across diverse platforms and applications.