Book Image

Expert Delphi

By : Paweł Głowacki
Book Image

Expert Delphi

By: Paweł Głowacki

Overview of this book

Delphi is the most powerful Object Pascal IDE and component library for cross-platform native app development. It enables building natively compiled, blazingly fast apps for all major platforms including Android, iOS, Windows, Mac, and Linux. If you want to build server-side applications, create web services, and have clear GUIs for your project, then this book is for you. The book begins with a basic primer on Delphi helping you get accustomed to the IDE and the Object Pascal language and will then quickly move on to advanced-level concepts. Through this book, we’ll help you understand the architecture of applications and will teach you the important concepts of the FireMonkey library, show you how to build server-side services, and enable you to interact with the Internet of Things. Towards the end, you will learn to integrate your app with various web services and deploy them. By the end of the book, you will be able to build powerful, cross-platform, native apps for iOS and Android with a single code base.
Table of Contents (14 chapters)

Working with maps

One of the most useful components in mobile apps is a map. Delphi comes with the cross-platform TMapView component that makes it easy to embed a map in an app.

On Android, it uses the Google Maps Android API and on iOS it uses the Map Kit Framework. On Android, it is necessary to first obtain the Google Maps API key. There are different possible view types on each platform. A map can be displayed as Normal, Satellite, or Hybrid. On Android there is also an additional Terrain view mode.

Let's build a simple app to try out different TMapView features. Create a new multi-device, blank Delphi app. Save the main form as uFormMap and the project as MapApp. Change the Name property of the form to FormMap. Drop TToolbar on the form and a TMapView component. Align to Client.

Drop the TComboBox component onto the toolbar. Rename it as cmbbxMapType and add five items...