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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
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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

Implementing the wrapper (FormatFloatInvokable)

Providing an implementation for our new method basically means we need to provide an IInvokable implementor. The MakeInvokable function (in the System.Bindings.Methods unit) will accept an anonymous method as an argument and return an implementor of the IInvokable interface. The anonymous method will get the arguments (parsed from the actual expression) as input parameters in the form of a dynamic array of IValue (another interface type defined in the System.Bindings.EvalProtocol unit), and will then return another IValue instance containing the result. 

We expect two or three arguments to be passed to our FormatFloat method in our LiveBindings expressions:

  • FormatString: This is a string that's used to specify the desired format for the number.
  • FloatValue: This is a floating-point (Extended) value that needs to be formatted.
  • Locale: This is an optional string identifier of the desired locale settings to...
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