Book Image

Delphi GUI Programming with FireMonkey

By : Andrea Magni
4 (1)
Book Image

Delphi GUI Programming with FireMonkey

4 (1)
By: Andrea Magni

Overview of this book

FireMonkey (FMX) is a cross-platform application framework that allows developers to create exciting user interfaces and deliver applications on multiple operating systems (OS). This book will help you learn visual programming with Delphi and FMX. Starting with an overview of the FMX framework, including a general discussion of the underlying philosophy and approach, you’ll then move on to the fundamentals and architectural details of FMX. You’ll also cover a significant comparison between Delphi and the Visual Component Library (VCL). Next, you’ll focus on the main FMX components, data access/data binding, and style concepts, in addition to understanding how to deliver visually responsive UIs. To address modern application development, the book takes you through topics such as animations and effects, and provides you with a general introduction to parallel programming, specifically targeting UI-related aspects, including application responsiveness. Later, you’ll explore the most important cross-platform services in the FMX framework, which are essential for delivering your application on multiple platforms while retaining the single codebase approach. Finally, you’ll learn about FMX’s built-in 3D functionalities. By the end of this book, you’ll be familiar with the FMX framework and be able to build effective cross-platform apps.
Table of Contents (18 chapters)
Section 1: Delphi GUI Programming Frameworks
Section 2: The FMX Framework in Depth
Section 3: Pushing to The Top: Advanced Topics

Subscribing for notifications

If the BLE device exposes a characteristic with notification capabilities, our application can subscribe to adequately handle them. Basically, you simply need to state notifications from those characteristics are enabled using the following code:

    FSubscribed := SelectedDevice.SetCharacteristicNotification(FCharacteristic, True);

Please note, SelectedDevice is a TBluetoothLEDevice instance you already connected to and explored services/characteristics of. FCharacteristic must be a valid reference to a TBluetoothGattCharacteristic instance of the selected device.

When the notification is received, the characteristic is read again and the OnCharacteristicRead event will be fired consequently, allowing you to properly react in your application code.

BLE is really on the rise for modern application development and the Delphi cross-platform support is very convenient as it enables writing applications in a wide range of use cases, especially...