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

Implementing interactive gestures

If standard actions are immediate to enable and use (binding them to TAction instances), different behavior is often expected by the user. Instead of waiting for the full gesture to be completed (and recognized), some touch-driven features imply the execution of some code during the life of the gesture itself.

Typical examples are the following:

  • Zoom: This gesture is about two fingers getting closer to or further from each other, in a pinch movement.
  • Pan: This gesture is about a single finger sliding on the touch screen (not necessarily in a straight direction).
  • Rotate: This gesture is about two fingers mimicking the act of rotating an object.
  • Long tap: This gesture is about pressing and keeping a single finger on the touch screen.

Other variations include the double tap, press, and tap. You can check the InteractiveGesture property of the Touch node of the form for a complete list.

For instance, you may want to implement a way for the...