How deeply does .NET MAUI in Action cover EntryHandler?

Explains mapper scope, subclass checks, compiler directives, and PlatformView customization without detailing handler internals.

EntryHandler

As explained in .NET MAUI in Action

EntryHandler is the .NET MAUI handler that maps Entry views to platform-specific native text-input controls.

EntryHandler maps .NET MAUI Entry views to native text-input controls. Its Mapper lets custom controls change platform behavior, but mappings must be scoped carefully because they otherwise affect every Entry. section 11.3.3

Customize a specific Entry by following these steps:

Subclass Entry, such as BorderlessEntry, and invoke customization from its constructor. section 11.3.3
Append a mapping through EntryHandler.Mapper, then check that the view is the intended subclass. section 11.3.3
Separate Android, Windows, iOS, and Mac Catalyst code with compiler directives and modify handler.PlatformView. section 11.3.3

Removing an Entry border

A BorderlessEntry mapping clears native borders differently on each platform: Android removes the background, iOS and macOS clear border properties, and Windows removes thickness, background, and focus margins. section 11.3.3

How .NET MAUI in Action covers it

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Related concepts

PlatformViewuses · PlatformView is a handler property that exposes the native platform control associated with a .NET MAUI view.
compiler directiveconfigured by · A compiler directive is a source-level instruction that controls compilation or directs related tooling without being an ordinary executable statement.

This explainer was generated by Manning's knowledge graph from the text of .NET MAUI in Action. The section links point to the parts of the book it draws on.