Advanced Programming | 17. Event-Driven Programming by Abraham | Learn Smarter
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17. Event-Driven Programming

Event-Driven Programming (EDP) transforms the interaction model of software applications, shifting from traditional procedural structure to responsiveness dictated by user actions and external events. This paradigm underlies various modern applications, such as GUIs and web platforms, facilitating non-linear programming and event management. Understanding EDP enhances developers' ability to create modular, scalable, and interactive systems that cater to real-time needs.

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Sections

  • 17

    Event-Driven Programming

    Event-Driven Programming (EDP) is a paradigm where the flow of the program is dictated by events such as user actions, making it essential for interactive applications.

    Learning Practice

  • 17.0

    Introduction

    Event-Driven Programming (EDP) is a modern programming paradigm that responds to user interactions and events, essential for building interactive applications like GUIs and web apps.

    Learning Practice

  • 17.1

    What Is Event-Driven Programming?

    Event-Driven Programming (EDP) is a programming paradigm where the program flow is dictated by events like user actions or system signals.

    Learning Practice

  • 17.1.1

    Key Components

    Event-Driven Programming consists of key components like events, event handlers, and event loops that enable interactive programming.

    Learning Practice

  • 17.2

    Core Concepts Of Edp

    This section introduces the core elements of Event-Driven Programming (EDP), including events, event sources, listeners, and dispatchers.

    Learning Practice

  • 17.2.1

    Events

    Events are key components in event-driven programming, representing actions or occurrences that the program can respond to.

    Learning Practice

  • 17.2.2

    Event Source

    An event source is the component in event-driven programming that generates events.

    Learning Practice

  • 17.2.3

    Event Listener (Observer)

    An event listener is a function or method that responds to occurrences within an event-driven programming environment.

    Learning Practice

  • 17.2.4

    Event Dispatcher

    An Event Dispatcher identifies the source of an event and notifies the appropriate listener or callback function in an event-driven system.

    Learning Practice

  • 17.3

    The Event Loop

    The event loop is a core component of event-driven programming that continuously waits for events and dispatches them to appropriate event handlers.

    Learning Practice

  • 17.4

    Event Handling Models

    This section covers various event handling models, including polling, interrupt/callback, and delegation models used in event-driven programming.

    Learning Practice

  • 17.4.1

    Polling Model

    The Polling Model involves checking for events continuously, but is considered inefficient and outdated in modern applications.

    Learning Practice

  • 17.4.2

    Interrupt/callback Model

    The Interrupt/Callback Model utilizes asynchronous callback functions triggered by events, making it integral to modern event-driven applications.

    Learning Practice

  • 17.4.3

    Delegation Event Model (Used In Java)

    The Delegation Event Model separates event generation from event handling, making it a crucial part of building responsive Java applications.

    Learning Practice

  • 17.5

    Event-Driven Programming In Gui Frameworks

    This section discusses event-driven programming in GUI frameworks, illustrating how user interactions trigger responses in applications.

    Learning Practice

  • 17.5.1

    Java Swing Example

    This section provides an example of creating a JButton in Java Swing and handling its event through an ActionListener.

    Learning Practice

  • 17.5.2

    Javafx Example

    This section introduces a simple example of event-driven programming using the JavaFX framework, illustrating how to handle button click events.

    Learning Practice

  • 17.5.3

    Python Tkinter Example

    This section introduces a simple example of event-driven programming using the Tkinter library in Python to create a GUI button that responds to user clicks.

    Learning Practice

  • 17.6

    Event-Driven Programming In Web Development

    This section explains the significance of Event-Driven Programming (EDP) specifically in web development, highlighting the reliance on user interactions and server responses.

    Learning Practice

  • 17.7

    Event Queue And Concurrency

    This section discusses how event-driven systems utilize event queues to manage concurrency, ensuring events are processed sequentially to avoid race conditions.

    Learning Practice

  • 17.8

    Event-Driven Vs Procedural Programming

    This section compares Event-Driven Programming (EDP) with Procedural Programming, focusing on their distinct characteristics and suitable applications.

    Learning Practice

  • 17.9

    Advantages Of Event-Driven Programming

    Event-Driven Programming offers several significant advantages, particularly in enhancing responsiveness and modularity in applications.

    Learning Practice

  • 17.10

    Challenges And Pitfalls

    This section discusses the common challenges and pitfalls of Event-Driven Programming, emphasizing issues like callback hell, state management, debugging difficulties, and performance bottlenecks.

    Learning Practice

  • 17.11

    Event-Driven Architectures In Enterprise Systems

    Event-driven architectures (EDA) are critical for implementing event-driven programming (EDP) in large-scale enterprise systems.

    Learning Practice

  • 17.12

    Tools And Frameworks

    The tools and frameworks listed are essential for implementing Event-Driven Programming across various programming languages.

    Learning Practice

  • 17.13

    Summary

    Event-Driven Programming is vital for creating interactive applications, allowing for responsiveness and modular application design.

    Learning Practice

References

Chapter_17_Event.pdf

Class Notes

Memorization

What we have learnt

  • Event-Driven Programming al...
  • Key components include even...
  • Challenges such as callback...

Final Test

Revision Tests