17.5. Event-Driven Programming in GUI Frameworks

Try these first

1. 1.

   What does an event-handler do in event-driven programming?

   Hint

   Think about how a button click might trigger something.

2. 2.

   Name one example of an event in a GUI application.

   Hint

   Consider interactions typical in apps.

3. 3.

   What is an event handler?

   • A loop that waits for events.
   • A function that is executed in response to an event.
   • A user interaction.

   Hint

   Think about the function linked to user actions.

4. 4.

   True or False: In event-driven programming, the control flow is entirely predetermined.

   • True
   • False

   Hint

   Consider how user clicks affect the flow.

5. 5.

   Design a Java Swing application that includes a button, a text field, and a label. When the button is clicked, the text field's content should update the label's text. Explain your design.

   Hint

   Consider how to capture the text and display it.

6. 6.

   Using Tkinter, create a graphical application that has a counter. Each time you press a button, the counter increment should be displayed on the label.

   Hint

   Think about scope and maintaining state across function calls.