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Delphi GUI Programming with FireMonkey

You're reading from   Delphi GUI Programming with FireMonkey Unleash the full potential of the FMX framework to build exciting cross-platform apps with Embarcadero Delphi

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Product type Paperback
Published in Oct 2020
Publisher Packt
ISBN-13 9781788624176
Length 546 pages
Edition 1st Edition
Languages
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Author (1):
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Andrea Magni Andrea Magni
Author Profile Icon Andrea Magni
Andrea Magni
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Table of Contents (18) Chapters Close

Preface 1. Section 1: Delphi GUI Programming Frameworks
2. Introducing the FireMonkey Framework FREE CHAPTER 3. Exploring Similarities and Differences with VCL 4. Section 2: The FMX Framework in Depth
5. Mastering Basic Components 6. Discovering Lists and Advanced Components 7. Using FireDAC in FMX Applications 8. Implementing Data Binding 9. Understanding FMX Style Concept 10. Divide and Conquer with TFrameStand 11. Building Responsive UIs 12. Orchestrating Transitions and Animations 13. Section 3: Pushing to The Top: Advanced Topics
14. Building Responsive Applications 15. Exploring Cross-Platform Services 16. Learning about FMX 3D Capabilities 17. Other Books You May Enjoy

Pull to refresh

One of the most universally accepted UI patterns on mobile devices involves the way in which the user can call for a data refresh, that is, pull down on the screen with a finger and have some visual feedback linked to the actual gesture of the user. If a threshold is reached, update the content and hide the visual feedback.

This kind of interaction is very common in a wide variety of applications (mail, social networks, and more) and can be applied to lists, grids, and other controls. The TListView component makes it very easy to implement this behavior, which is, in fact, built in and, on mobile platforms, can have some native integrations (that is, platform-specific animations). To enable pull-to-refresh (which is off by default), you can set the PullToRefresh property of TListView to True and implement the OnPullRefresh event handler.

In the following screenshot, you can see the steps involved in a pull-to-refresh interaction...

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