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

Learning about interpolation

In this section, we will learn about interpolation. We will also have a look at non-linear interpolations so that we gain an in-depth understanding of the topic. We will then build a demo project to demonstrate what we have learned.

To define animations using a constant duration, we need to move from our number of steps concept to a time-framed concept. We want to change the value of our Width property from 300 to 80 within a certain time period (1 second).

The other change we need to acknowledge is the one from iterative or imperative programming to a more event-driven approach; that is, in a time period starting from a certain point in time and within a defined duration, each X milliseconds, we want to use some code. This code will calculate the current value our Width property should have at this moment in time. This process is called interpolation.

The following graph shows this interpolation process:

Figure 10.1

As you can see, we have...