Book Image

Delphi GUI Programming with FireMonkey

By : Andrea Magni
Book Image

Delphi GUI Programming with FireMonkey

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

Understanding TDummy and the design-time camera

In the standard (2D) FMX environment, we are used to having TLayout instances acting as invisible containers. This lets the developer easily position and size objects (or groups of them) to achieve responsive UIs (as we discussed in Chapter 9, Building Responsive UIs). TLayout instances are invisible at runtime (and to the end user), yet they can be used to group other components and implement relative positioning and sizing. TDummy is the equivalent of TLayout in the 3D conception.

A TDummy component has a cubic shape and its boundaries are rendered only at design time. You can nest as many instances of TDummy as you like and you can size them as you prefer. They also can host other components and the contained component(s) will be relative to the container in terms of position, rotation, visibility, and other qualities (opacity, for example).

It is quite common to use a TDummy instance as the parent of all other components in the...