Icons.Avalonia

A library to easily display icons in an Avalonia App.

NuGet

Name	Description	Version
Projektanker.Icons.Avalonia	Core library
Projektanker.Icons.Avalonia.FontAwesome	Font Awesome Free

Usage

A full example is available in the demo directory.

1. Register icon providers on app start up

Use the AppBuilder.AfterSetup method to register a callback. Within this callback register the icon prodider(s). Otherwise the visual designer won't be able to use the registered icon provider(s).

class Program
{
    // Initialization code. Don't use any Avalonia, third-party APIs or any
    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
    // yet and stuff might break.
    public static void Main(string[] args)
    {
        BuildAvaloniaApp()
            .StartWithClassicDesktopLifetime(args);
    }

    // Avalonia configuration, don't remove; also used by visual designer.
    public static AppBuilder BuildAvaloniaApp()
    {
        return AppBuilder.Configure<App>()
            .AfterSetup(AfterSetupCallback)
            .UsePlatformDetect()
            .LogToTrace();
    }
    
    // Called after setup
    private static void AfterSetupCallback(AppBuilder appBuilder)
    {
        // Register icon provider(s)
        IconProvider.Register<FontAwesomeIconProvider>();
    }
}

2. Add xml namespace

Add xmlns:i="clr-namespace:Projektanker.Icons.Avalonia;assembly=Projektanker.Icons.Avalonia" to your view.

3. Use the icon

Example: The GitHub icon.
FontAwesome

<i class="fab fa-github"></i>

Standalone

<i:Icon Value="fab fa-github" />

Attached

<Button i:Attached.Icon="fab fa-github" />

Done

Screenshot

Implement your own Icon Provider

Just implement the IIconProvider interface:

namespace Projektanker.Icons.Avalonia
{
    /// <summary>
    /// Represents an icon provider.
    /// </summary>
    public interface IIconProvider
    {
        /// <summary>
        /// Gets the prefix of the <see cref="IIconProvider"/>.
        /// </summary>
        string Prefix { get; }

        /// <summary>
        /// Gets the SVG path of the requested icon using the registered icon providers.
        /// </summary>
        /// <param name="value">The value specifying the icon to return it's path from.</param>
        /// <returns>The path of the icon.</returns>
        /// <exception cref="System.Collections.Generic.KeyNotFoundException">The icon associated
        /// with the specified <paramref name="value"/> does not exists.</exception>
        string GetIconPath(string value);
    }
}

and register it with the IconProvider:

IconProvider.Register<MyCustromIconProvider>()

or

IIconProvider provider = new MyCustomIconProvider(/* custom ctor arguments */);
IconProvider.Register(provider);

The IIconProvider.Prefix property have to be unique within all registered providers. It is used to select the right provider. E.g. FontAwesomeIconProvider's prefix is fa.