maui-linux/Handlers/GraphicsViewHandler.cs

63 lines
2.1 KiB
C#

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using Microsoft.Maui.Handlers;
using Microsoft.Maui.Graphics;
using SkiaSharp;
namespace Microsoft.Maui.Platform.Linux.Handlers;
/// <summary>
/// Handler for GraphicsView on Linux using Skia rendering.
/// Maps IGraphicsView interface to SkiaGraphicsView platform view.
/// IGraphicsView has: Drawable, Invalidate()
/// </summary>
public partial class GraphicsViewHandler : ViewHandler<IGraphicsView, SkiaGraphicsView>
{
public static IPropertyMapper<IGraphicsView, GraphicsViewHandler> Mapper = new PropertyMapper<IGraphicsView, GraphicsViewHandler>(ViewHandler.ViewMapper)
{
[nameof(IGraphicsView.Drawable)] = MapDrawable,
[nameof(IView.Background)] = MapBackground,
};
public static CommandMapper<IGraphicsView, GraphicsViewHandler> CommandMapper = new(ViewHandler.ViewCommandMapper)
{
[nameof(IGraphicsView.Invalidate)] = MapInvalidate,
};
public GraphicsViewHandler() : base(Mapper, CommandMapper)
{
}
public GraphicsViewHandler(IPropertyMapper? mapper, CommandMapper? commandMapper = null)
: base(mapper ?? Mapper, commandMapper ?? CommandMapper)
{
}
protected override SkiaGraphicsView CreatePlatformView()
{
return new SkiaGraphicsView();
}
public static void MapDrawable(GraphicsViewHandler handler, IGraphicsView graphicsView)
{
if (handler.PlatformView is null) return;
handler.PlatformView.Drawable = graphicsView.Drawable;
}
public static void MapBackground(GraphicsViewHandler handler, IGraphicsView graphicsView)
{
if (handler.PlatformView is null) return;
if (graphicsView.Background is SolidPaint solidPaint && solidPaint.Color is not null)
{
handler.PlatformView.BackgroundColor = solidPaint.Color.ToSKColor();
}
}
public static void MapInvalidate(GraphicsViewHandler handler, IGraphicsView graphicsView, object? args)
{
handler.PlatformView?.Invalidate();
}
}