Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Home > Event handler

An event handler is a part of a computer program created to tell the program how to act in response to a specific event (e.g. the clicking of a mouse or the dragging of a scrollbar or pressing a button). The programmer's custom event handling functions will be executed by the event dispatcher. The event dispatcher is part of the operating system that detects Graphical User Interface (GUI) events, and calls functions in the executing program to handle those events.

Without event handlers nothing would happen when you interacted with an event driven program, as most GUI programs are.

How event handlers function is highly dependent on the operating system, programming language, and GUI framework used. A programmer will need to consult the documentation provided with the language used to get the exact syntax and usage of event handling. A user only needs to know how their operating system functions. Users do not need to have any knowledge of the underlying event handler code.

<Hide>

Topics: Event Handler, Event Horizon, Event (probability Theory)...

EventThere are many kinds of events In common language, an event is something that happens (changes), in particular something special of limited duration, for example a major football match or pop music concert. An event is an outcome, result, reference or sin	Event HorizonEvent Horizon is a 1997 science fiction and horror movie. It was directed by Paul W. Anderson, written by Philip Eisner, and stars The Matrix's Laurence Fishburne and Jurassic Park's Sam Neill. Plot summary In the year 2047, a rescue crew investigates a s	Event horizonFor the science fiction film, see Event Horizon (film An event horizon is a boundary in spacetime for a given observer beyond which no information, including light, can reach the observer. The most famous example is a black hole, which for a distant and s
Event (probability theory)In probability theory, an event is a set of outcomes (a subset of the sample space) to which a probability is assigned. Typically, any subset of the sample space is an event i''. all elements of the power set of the sample space are events), but when defi	Event cascadeIn event-driven computer programs, an event cascade occurs when an event handler causes another event to occur which also triggers an event handler. This can be a tricky source of program errors (see computer bug).	EventingEventing is an equestrian event which comprises dressage, show-jumping and cross-country. This event has its roots as a comprehensive cavalry test requiring mastery of several types of riding. It has two main formats, the one day event (1DE) and the three
Event-driven programming	Eventus Bonus	Event listener
Event driven programming language	Events in the Wheel of Time series	Events preceding World War II in Europe
Event handler	Event queue	Event-related potential

Non User