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Delphi Cookbook

By : Daniele Teti

4.5 (19)

Delphi Cookbook

4.5 (19)

By: Daniele Teti

Overview of this book

Intended to refresh the basics of Delphi as well as advance your knowledge to the next level, it is assumed you will know RAD studio and the Object Pascal language. However, if you are not an experienced RAD studio programmer this accessible guide will still develop those initial crucial skills.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Delphi Basics

1. Delphi Basics

Introduction

Changing your application's look and feel with VCL styles and no code

Changing the style of your VCL application at runtime

Customizing TDBGrid

Using the owner's draw combos and listboxes

Creating a stack of embedded forms

Manipulating JSON

Manipulating and transforming XML documents

I/O in the twenty-first century – knowing streams

Putting your VCL application in the tray

Creating a Windows service

Associating a file extension with your application on Windows

2. Become a Delphi Language Ninja

2. Become a Delphi Language Ninja

Introduction

Fun with anonymous methods – using higher-order functions

Writing enumerable types

RTTI to the rescue – configuring your class at runtime

Duck typing using RTTI

Creating helpers for your classes

Checking strings with regular expressions

3. Going Cross Platform with FireMonkey

3. Going Cross Platform with FireMonkey

Introduction

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

4. The Thousand Faces of Multithreading

4. The Thousand Faces of Multithreading

Introduction

Synchronizing shared resources with TMonitor

Talking with the main thread using a thread-safe queue

Synchronizing multiple threads using TEvent

Displaying a measure on a 2D graph like an oscilloscope

5. Putting Delphi on the Server

5. Putting Delphi on the Server

Introduction

Web client JavaScript application with WebBroker on the server

Converting a console service application to a Windows service

Serializing a dataset to JSON and back

Serializing objects to JSON and back using RTTI

Sending a POST HTTP request encoding parameters

Implementing a RESTful interface using WebBroker

Controlling remote applications using UDP

Using App Tethering to create a companion app

Creating DataSnap Apache modules

6. Riding the Mobile Revolution with FireMonkey

6. Riding the Mobile Revolution with FireMonkey

Introduction

Taking a photo, applying effects, and sharing it

Using listview to show and search local data

Do not block the main thread!

Using SQLite databases to handle a to-do list

Using a styled TListView to handle a long list of data

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

Talking to the backend

Making a phone call from your app!

Tracking the application's life cycle

7. Using Specific Platform Features

7. Using Specific Platform Features

Introduction

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

Index

Index

Writing enumerable types

When the for..in loop was introduced in Delphi 2005, the concept of enumerable types was also introduced into the Delphi language.

As you know, there are some built-in enumerable types. However, you can create your own enumerable types using a very simple pattern.

To make your container enumerable, implement a single method called GetEnumerator, that must return a reference to an object, interface, or record, that implements the following three methods and one property (in the sample, the element to enumerate is TFoo):

function GetCurrent: TFoo;
function MoveNext: Boolean;
property Current: TFoo read GetCurrent;

There are a lot of samples related to standard enumerable types, so in this recipe you'll look at some not-so-common utilizations.

Getting ready

In this recipe, you'll see a file enumerable function as it exists in other, mostly dynamic, languages. The goal is to enumerate all the rows in a text file without actual opening, reading and closing the file...

CONTINUE READING

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Tech Concepts

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Programming languages

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