Book Image

Hands-On Design Patterns with Delphi

By : Primož Gabrijelčič
Book Image

Hands-On Design Patterns with Delphi

By: Primož Gabrijelčič

Overview of this book

Design patterns have proven to be the go-to solution for many common programming scenarios. This book focuses on design patterns applied to the Delphi language. The book will provide you with insights into the language and its capabilities of a runtime library. You'll start by exploring a variety of design patterns and understanding them through real-world examples. This will entail a short explanation of the concept of design patterns and the original set of the 'Gang of Four' patterns, which will help you in structuring your designs efficiently. Next, you'll cover the most important 'anti-patterns' (essentially bad software development practices) to aid you in steering clear of problems during programming. You'll then learn about the eight most important patterns for each creational, structural, and behavioral type. After this, you'll be introduced to the concept of 'concurrency' patterns, which are design patterns specifically related to multithreading and parallel computation. These will enable you to develop and improve an interface between items and harmonize shared memories within threads. Toward the concluding chapters, you'll explore design patterns specific to program design and other categories of patterns that do not fall under the 'design' umbrella. By the end of this book, you'll be able to address common design problems encountered while developing applications and feel confident while building scalable projects.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
About Packt


Besides the concept of actions, which are implementations of the command pattern, Delphi also contains a well—integrated implementation of an observer pattern in the form of the LiveBindings mechanism.


The observer pattern is discussed in Chapter 7,  Iterator, Visitor, Observer, and Memento.

LiveBindings, which is partially implemented in the IDE and partially in the runtime library, helps create applications without any line of code. Of course, that is only the best—case scenario and in almost any useful application you will have to write some code.

The LiveBindings mechanism is very powerful and quite complicated, so I cannot do it any real honor on these few pages. I will therefore present just a short recipe, which will show you how to use LiveBindings to display data from a table. It will hopefully give you a taste of LiveBindings and the possibilities behind it. If you would like to learn more, I'd recommend reading an extensive white paper that was published by Embarcadero...