66 lines
1.8 KiB
C#
66 lines
1.8 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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using SkiaSharp;
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using Microsoft.Maui.Graphics;
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using Microsoft.Maui.Graphics.Skia;
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namespace Microsoft.Maui.Platform;
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/// <summary>
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/// Skia-rendered graphics view that supports IDrawable for custom drawing.
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/// </summary>
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public class SkiaGraphicsView : SkiaView
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{
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private IDrawable? _drawable;
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public IDrawable? Drawable
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{
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get => _drawable;
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set
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{
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_drawable = value;
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Invalidate();
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}
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}
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protected override void OnDraw(SKCanvas canvas, SKRect bounds)
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{
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// Draw background
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if (BackgroundColor != SKColors.Transparent)
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{
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using var bgPaint = new SKPaint
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{
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Color = BackgroundColor,
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Style = SKPaintStyle.Fill
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};
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canvas.DrawRect(bounds, bgPaint);
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}
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// Draw using IDrawable
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if (_drawable != null)
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{
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var dirtyRect = new RectF(bounds.Left, bounds.Top, bounds.Width, bounds.Height);
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using var skiaCanvas = new SkiaCanvas();
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skiaCanvas.Canvas = canvas;
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_drawable.Draw(skiaCanvas, dirtyRect);
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}
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}
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protected override SKSize MeasureOverride(SKSize availableSize)
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{
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// Graphics view takes all available space by default
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if (availableSize.Width < float.MaxValue && availableSize.Height < float.MaxValue)
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{
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return availableSize;
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}
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// Return a reasonable default size
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return new SKSize(
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availableSize.Width < float.MaxValue ? availableSize.Width : 100,
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availableSize.Height < float.MaxValue ? availableSize.Height : 100);
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}
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}
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