123 lines
3.8 KiB
C#
123 lines
3.8 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 Microsoft.Maui.Controls;
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using Microsoft.Maui.Graphics;
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using SkiaSharp;
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namespace Microsoft.Maui.Platform;
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/// <summary>
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/// Skia-rendered BoxView - a simple colored rectangle.
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/// Implements MAUI IBoxView interface patterns.
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/// </summary>
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public class SkiaBoxView : SkiaView
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{
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#region BindableProperties
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public static readonly BindableProperty ColorProperty =
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BindableProperty.Create(nameof(Color), typeof(Color), typeof(SkiaBoxView), Colors.Transparent,
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BindingMode.TwoWay, propertyChanged: (b, o, n) => ((SkiaBoxView)b).Invalidate());
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public static readonly BindableProperty CornerRadiusProperty =
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BindableProperty.Create(nameof(CornerRadius), typeof(CornerRadius), typeof(SkiaBoxView), new CornerRadius(0),
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BindingMode.TwoWay, propertyChanged: (b, o, n) => ((SkiaBoxView)b).Invalidate());
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#endregion
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#region Properties
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public Color Color
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{
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get => (Color)GetValue(ColorProperty);
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set => SetValue(ColorProperty, value);
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}
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public CornerRadius CornerRadius
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{
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get => (CornerRadius)GetValue(CornerRadiusProperty);
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set => SetValue(CornerRadiusProperty, value);
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}
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#endregion
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#region Helper Methods
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/// <summary>
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/// Converts a MAUI Color to SkiaSharp SKColor.
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/// </summary>
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private static SKColor ToSKColor(Color? color)
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{
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if (color == null) return SKColors.Transparent;
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return color.ToSKColor();
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}
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#endregion
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#region Drawing
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protected override void OnDraw(SKCanvas canvas, SKRect bounds)
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{
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SKColor fillColor = ToSKColor(Color);
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using var paint = new SKPaint
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{
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Color = fillColor,
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Style = SKPaintStyle.Fill,
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IsAntialias = true
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};
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// Check if any corner radius is set
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var cr = CornerRadius;
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bool hasRadius = cr.TopLeft > 0 || cr.TopRight > 0 || cr.BottomLeft > 0 || cr.BottomRight > 0;
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if (hasRadius)
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{
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// Check if all corners are the same (uniform radius)
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if (cr.TopLeft == cr.TopRight && cr.TopRight == cr.BottomRight && cr.BottomRight == cr.BottomLeft)
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{
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canvas.DrawRoundRect(bounds, (float)cr.TopLeft, (float)cr.TopLeft, paint);
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}
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else
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{
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// Different corner radii - use SKRoundRect with individual radii
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var radii = new SKPoint[]
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{
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new SKPoint((float)cr.TopLeft, (float)cr.TopLeft),
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new SKPoint((float)cr.TopRight, (float)cr.TopRight),
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new SKPoint((float)cr.BottomRight, (float)cr.BottomRight),
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new SKPoint((float)cr.BottomLeft, (float)cr.BottomLeft)
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};
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var roundRect = new SKRoundRect();
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roundRect.SetRectRadii(bounds, radii);
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canvas.DrawRoundRect(roundRect, paint);
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}
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}
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else
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{
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canvas.DrawRect(bounds, paint);
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}
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}
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#endregion
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#region Measurement
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protected override Size MeasureOverride(Size availableSize)
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{
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// BoxView uses explicit size or a default size when in unbounded context
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var width = WidthRequest >= 0 ? WidthRequest :
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(double.IsInfinity(availableSize.Width) ? 40.0 : availableSize.Width);
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var height = HeightRequest >= 0 ? HeightRequest :
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(double.IsInfinity(availableSize.Height) ? 40.0 : availableSize.Height);
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// Ensure no NaN values
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if (double.IsNaN(width)) width = 40.0;
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if (double.IsNaN(height)) height = 40.0;
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return new Size(width, height);
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}
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#endregion
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}
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