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)

Taking photos

On many occasions, it is useful to be able to take a photo from an app. The programming model is very easy, but it is not the TCamera component that you need to use. In FireMonkey, taking photos is achieved by executing a special "take a photo from a camera" action.

Create a new multi-device FireMonkey blank application. Save the main form's unit as uFormCam, the project as CamApp, and change the Name property of the form to FormCam. Change the Style in the combobox above the form to iOS or Android. Drop TToolbar and TImage components on the form. Rename the image as ImagePhoto and align it to Client and drop TSpeedbutton onto the Toolbar1. Change its Name to spdbtnTakePhoto and the button's Stylelookup property to cameratoolbutton; align it to the Left and adjust the width so it becomes a square. Save all.

Drop the TActionList component on the...