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MauiCompatSteps.md

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Maui Compat Steps

The following steps are used to create the MauiCompat libraries

1. Create Xamarin.CommunityToolit.MauiCompat Branch From Latest Tag

  1. Create new branch from the latest tag:

    git checkout -b Xamarin.CommunityToolkit.MauiCompat-[version] [tag]

    Example: git checkout -b Xamarin.CommunityToolkit.MauiCompat-1.3.0-pre2 1.3.0-pre2

  2. Push new branch to github

    git push --set-upstream origin Xamarin.CommunityToolkit.MauiCompat-[version]

    Example: git push --set-upstream origin Xamarin.CommunityToolkit.MauiCompat-1.3.0-pre2

2. Run MauiCompat.sh script to migrate Xamarin.CommunityToolkit and create Xamarin.CommunityToolkit.MauiCompat and Xamarin.CommunityToolkit.Markup.MauiCompat

zsh ./MauiCompat.sh

3. Add MauiColorExtensions Classes

In .NET MAUI the Color object has been changed from a struct to an object. Because of that, we now need to be aware of passing null values on methods that have to do with colors. For instance, the ToAndroid() and ToUIColor() extension methods that take a .NET MAUI Color and convert it into a native platform color. There are multiple ways to solve this, but we chose to overload these extension methods with our own. This method checks if the incoming color is null, if it is, we replace the color with Colors.Transparent and pass it to the extension method and return its value.

This way we didn't need to edit all the lines with this extension method individually.

3.1 Add using Statement to Files Which Reference Original Extension Methods

Now in each file that references the ToAndroid() and ToUIColor() methods we need to add the using Xamarin.CommunityToolkit.MauiCompat; line to make sure that it uses our extension method. There is one catch: you have to declare this using inside the namespace declaration so that it will prefer our extension method over the .NET MAUI one. In example:

// ... Rest omitted for brevity
using Microsoft.Maui.Controls.Compatibility;
using Microsoft.Maui.Controls.Compatibility.Platform.Android;
// ... Rest omitted for brevity

[assembly: ExportRenderer(typeof(DrawingView), typeof(DrawingViewRenderer))]

namespace Xamarin.CommunityToolkit.UI.Views
{
	// Make sure this using is here!
	using Xamarin.CommunityToolkit.MauiCompat;

	public class DrawingViewRenderer : ViewRenderer<DrawingView, View> { }

4. Build projects

dotnet build ./src/Markup/Xamarin.CommunityToolkit.Markup.MauiCompat.sln -c Release

dotnet build ./src/CommunityToolkit/Xamarin.CommunityToolkit.MauiCompat.sln -c Release