In this post, we learn about the Advantages and Disadvantages of Event-Driven Programming and its principles.

Advantages of Event-Driven Programming

1. Flexibility

 Programmers that use event-driven can be altered easily if the programmer wants something to be changed. This paradigm allows the programmer to produce a form of their requirements.

Programmers who are event-driven can be put together without too many problems and also the code and design can be easily altered because if something isn't right.

2. Suitability for Graphical Interfaces

 Event-driven allows the user to select different tools from the toolbar to directly create what they need such as buttons, radio buttons, etc.

This also allows people to put objects where they want them and can directly edit. Some people find it easier to directly click on the thing they want to edit.

3. Simplicity of Programming

Event-driven can make programming easier for some by being able to directly edit the object you want the code for.

Another thing that can make the programming easier is that when using an event driven language such as visual basic it usually has predictive coding so when the user is coding it will predict what you want to do from what you are typing.

4. Easy to Find Natural Dividing Lines

it is easy to find natural dividing lines for unit testing infrastructure.

5. Highly Compostable

It is highly compostable.

6. Simple and Understandable

It allows for a very simple and understandable model for both sides of the DevOps Bridge.

7. Purely Procedural and Purely Imperative

Both purely procedural and purely imperative approaches get brittle as they grow in length and complexity.

8. A good way to Model Systems

It is one good way to model systems that need to be both asynchronous and reactive.

9. Allows for more Interactive Programs

It allows for more interactive programs. Almost all modern GUI programs use event-driven programming.

10. Using Hardware Interrupts

It can be implemented using hardware interrupts, which will reduce the power used by the computer.

11. Allows sensors and other hardware

It allows sensors and other hardware to easily interact with software.

Also Read: Advantages and Disadvantages of Computers

Disadvantages Event-Driven Programming

1. Complex

For simple programs, event-driven programming is often more complex and cumbersome than batch programming.

2. Less Logical and Obvious

The flow of the program is usually less logical and obvious

3. Difficult to find Error

Errors can be more difficult to spot than with simpler, procedural programs.

4. Slower

Programs with complex GUIs may be slower to load and run than simpler programs particularly if RAM is insufficient.

5. Confusing

Programs with too many forms can be very confusing and/or frustrating for the user

6. Tight Coupling

Possible tight coupling between the event schema and the consumers of the schema.

7. Blocking

Reasoning about blocking operations might be becoming more difficult.

Principles of Event-Driven Programming

  • A set of functions that handle events. Depending on the implementation these can be blocking or non-blocking.
  • A mechanism for binding the registered functions to events.
  • The main loop (or loops, if you are brave) which constantly polls for new events and calls the matching event handler(s) when a registered event is received.

Why is Event-Driven Programming Object Oriented?

Visual Basic is not an "Object-Oriented Language" its "Object-based Language" because, in VB we cannot implement Object-Oriented Concepts like Inheritance, Polymorphism, Encapsulation, and Abstraction.

But it is an Event drive programming, easy to develop applications. VB is used to Develop Graphical User Interface Applications (GUIs).

VB is Object-Based Event-Driven Programming Language as we use Objects to create our Applications such as Text Box, Command Button on Form and it is also called Event Driven Language because anything we do on VB application such as Click Mouse on command Button to execute any command or enter the text in a text box, etc.

Everything is an event that's why we call it Object-Based, Event-Driven Programming