Event CS Thinking Example 1
Follow the full solution, then compare it with the other examples linked below.
Example 1
easyIn a GUI application, a user clicks a 'Submit' button. Describe what happens in terms of events and event handling.
Solution
- 1 Step 1: The click generates an event — a signal that something has happened (a 'click event' on the Submit button).
- 2 Step 2: The operating system detects the click and passes the event to the application.
- 3 Step 3: The application has an event handler (a function) linked to the Submit button's click event. This handler runs — for example, it might validate the form and send the data.
Answer
The click creates an event, which triggers an event handler function that processes the form submission.
Event-driven programming revolves around responding to events (user actions, timers, messages). Instead of running linearly, the program waits for events and runs the appropriate handler.
About Event
A detectable action or occurrence in a program—such as a user click, key press, mouse movement, or timer expiry—that the program can respond to by executing a predefined event handler function.
Learn more about Event →More Event Examples
Example 2 medium
Compare event-driven programming with sequential programming. Give an example of each.
Example 3 mediumA simple alarm clock app has these features: set alarm time, snooze for 5 minutes, dismiss alarm. Id
Example 4 hardIn a game, multiple events can occur simultaneously: a key is pressed, a timer fires, and two object