Book Image

Delphi Cookbook - Third Edition

By : Daniele Spinetti, Daniele Teti

Book Image

Delphi Cookbook - Third Edition

By: Daniele Spinetti, Daniele Teti

Overview of this book

Delphi is a cross-platform integrated development environment (IDE) that supports rapid application development on different platforms, saving you the pain of wandering amid GUI widget details or having to tackle inter-platform incompatibilities. Delphi Cookbook begins with the basics of Delphi and gets you acquainted with JSON format strings, XSLT transformations, Unicode encodings, and various types of streams. You’ll then move on to more advanced topics such as developing higher-order functions and using enumerators and run-time type information (RTTI). As you make your way through the chapters, you’ll understand Delphi RTL functions, use FireMonkey in a VCL application, and cover topics such as multithreading, using aparallel programming library and deploying Delphi on a server. You’ll take a look at the new feature of WebBroker Apache modules, join the mobile revolution with FireMonkey, and learn to build data-driven mobile user interfaces using the FireDAC database access framework. This book will also show you how to integrate your apps with Internet of Things (IoT). By the end of the book, you will have become proficient in Delphi by exploring its different aspects such as building cross-platforms and mobile applications, designing server-side programs, and integrating these programs with IoT.

Preface

Who this book is for

What this book covers

To get the most out of this book

Free Chapter

Delphi Basics

Changing your application's look and feel with VCL styles

Changing the style of your VCL application at runtime

Customizing TDBGrid

Using owner-draw combos and listboxes

Making an owner-draw control aware of the VCL styles

Creating a stack of embedded forms

Manipulating JSON

Manipulating and transforming XML documents

I/O in the 21st century – knowing the streams

Creating a Windows Service

Associating a file extension with your application on Windows

Be coherent with the Windows look and feel using TTaskDialog

The amazing TFDTable – indices, aggregations, views, and SQL

ETL made easy – TFDBatchMode

Data integration made easy – TFDLocalSQL

Becoming a Delphi Language Ninja

Becoming a Delphi Language Ninja

Fun with anonymous methods – using higher-order functions

Writing enumerable types

Using enumerable types to create new language features

RTTI to the rescue – configuring your class at runtime

Duck typing using RTTI

BOs validation using RTTI attributes

Creating helpers for your classes

Knowing Your Friends – The Delphi RTL

Knowing Your Friends – The Delphi RTL

Checking strings with regular expressions

Consuming RESTful services using native HTTP(S) client libraries

Coping with the encoded internet world using System.NetEncodings

Saving space using System.Zip

Decoupling your code using a cross-platform publish/subscribe mechanism

Going Cross-Platform with FireMonkey

Going Cross-Platform with FireMonkey

Giving a new appearance to the standard FireMonkey controls using styles

Creating a styled TListBox

Impressing your clients with animations

Using master/details with LiveBindings

Showing complex vector shapes using paths

Using FireMonkey in a VCL application

Reinventing your GUI, also known as mastering Firemonkey controls, shapes, and effects

The Thousand Faces of Multithreading

The Thousand Faces of Multithreading

Synchronizing shared resources with TMonitor

Talking with the main thread using a thread-safe queue

Synchronizing multiple threads using TEvent

Communication made easy with Delphi Event Bus

Displaying a measure on a 2D graph like an oscilloscope

Using the Parallel Programming Library in the real world: Tasks

Using the Parallel Programming Library in the real world: Futures

Using the Parallel Programming Library in the real world: Parallel For/Join

Putting Delphi on the Server

Putting Delphi on the Server

Developing web client JavaScript applications with WebBroker on the server

Converting a console application into a Windows service

Serializing a dataset to JSON and back

Serializing objects to JSON and back using RTTI

Sending a POST HTTP request for encoding parameters

Implementing a RESTful interface using WebBroker

Controlling the remote application using UDP

Using app tethering to create a companion app

Creating DataSnap Apache modules

Creating WebBroker Apache modules

Using native HTTP(S) client libraries

Logging like a pro using LoggerPro

Linux Development

Linux Development

Creating Linux TCP/IP servers

How to correctly handle Linux signals

How to build a modern Linux daemon

Building a TCP/IP Linux server and daemonizing it

Building a RESTFul server for Linux

Building a complete RESTful server with database access and web client interface

Creating WebBroker Apache modules for Linux

Riding the Mobile Revolution with FireMonkey

Riding the Mobile Revolution with FireMonkey

Taking a photo, applying effects, and sharing it

Using TListView to show and search local data

Using SQLite databases to handle a to-do list

Do not block the main thread!

Using a styled TListView to handle a long list of data

Customizing the TListView

Taking a photo and location and sending it to a server continuously

Talking with the backend

Making a phone call from your app

Tracking the application's life cycle

Building your own SMS sending service with the REST API

Using specific platform features

Using specific platform features

Using Android SDK Java classes

Using iOS Objective-C SDK classes

Displaying PDF files in your app

Sending Android Intents

Letting your phone talk – using the Android TextToSpeech engine

Using Java classes in Android apps with Java2OP

Doing it in the background, the right way – Android services

Delphi and IoT

How to blink an LED using Arduino

How to drive multiple relays with Arduino and Delphi

Reading data from Arduino

How to blink an LED using Raspberry Pi

How to drive multiple relays with Raspberry Pi and Delphi

Reading data from Raspberry PI

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Sending a POST HTTP request for encoding parameters

HTTP protocol supports some types of verbs. A verb is a way to ask a remote server something. Some of these verbs are GET, POST, PUT, DELETE, HEAD, PATCH, TRACE, and OPTIONS. For a detailed description of HTTP protocol, you can read the related RFCs at the following URLs:

RFC7230, about HTTP/1.1 protocol: https://tools.ietf.org/html/rfc7230
A specific section about the available verbs in the HTTP/1.1 protocol: https://tools.ietf.org/html/rfc7231#section-4

When you write a URL in the browser address bar and hit Return, you are issuing a GET request to the remote HTTP server. However, when you have to send form data to the server, usually, the HTML form uses the POST method. POST is designed to allow a uniform method of sending a block of data, such as the result of submitting a form to a data handling process or to post a message...