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

Connecting to a BLE device

Once you have a reference to a TBluetoothLEDevice instance, you can discover the services exposed by the device in order to get access to a TBluetoothGattService instance. This instance represents the service you are looking for and will get you access to the underlying characteristics.

Once again, the model is asynchronous so you will call Connect on the TBluetoothLEDevice instance and then start the discovery of its services with a call to the DiscoverServices method. Then the TBlutoothLE.OnServicesDiscovered event will fire when the operation completes. A convenient argument of the AServiceList event handler, TBluetoothGattServiceList will let you iterate through the discovered services and, for each service, you can enumerate its characteristics (through the homonym property).

A reference to the characteristic is needed to read and write data, using the TBluetoothLEDevice.ReadCharacteristic and WriteCharacteristic methods, as...