Behavioral Design Patterns in C++ - DialogBox - I

The video tutorial introduces the Mediator design pattern, explaining its application through a simulated UI with classes for widgets like buttons, edit boxes, list boxes, and radio groups. The instructor outlines the creation of a base class for event handling and demonstrates how to implement specific widget classes. The tutorial concludes with a summary and a preview of the next steps in programming interactions between these classes.

What is the primary purpose of using the Mediator design pattern in the context of a dialog box with multiple UI elements?

• To increase the complexity of the code.

• To reduce the number of direct connections between UI elements.

• To allow each UI element to function without any events.

• To make each UI element independent of others.

How do widgets communicate with each other in the described system?

• By using a shared global variable.

• Via events and the command pattern.

• Through direct method calls.

• By sending messages over a network.

What is the role of the command pattern in the widget system?

• To send events to receivers.

• To store the state of the application.

• To manage the layout of the UI.

• To handle user input directly.

What is the purpose of the base class for widgets?

• To provide a common interface for painting and event handling.

• To store the data of each widget.

• To manage the layout of the widgets.

• To handle network communication.

Which function is used in the button class to indicate a button click?

• trigger()

• click()

• activate()

• press()

What data structure is used in the list box class to hold multiple items?

• Array

• Vector

• Linked List

• Stack

How is the selection represented in the radio group class?

• As a boolean value.

• As a string.

• As a floating-point number.

• As an integer index.