Add some missing TypeConverters

src/Avalonia.Base/CornerRadius.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 #if !BUILDTASK
 using Avalonia.Animation.Animators;
@@ -11,6 +12,7 @@ namespace Avalonia
     /// Represents the radii of a rectangle's corners.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(CornerRadiusConverter))]
     public
 #endif
     readonly struct CornerRadius : IEquatable<CornerRadius>

src/Avalonia.Base/CornerRadiusConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="CornerRadius"/> from a string representation.
+/// </summary>
+public class CornerRadiusConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? CornerRadius.Parse(s) : null;
+    }
+}

src/Avalonia.Base/Matrix.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 using System.Linq;
 using System.Numerics;
@@ -18,6 +19,7 @@ namespace Avalonia
     /// Note: Skia.SkMatrix uses a transposed layout (where for example skewX/skewY and persp0/transX are swapped).
     /// </remarks>
 #if !BUILDTASK
+    [TypeConverter(typeof(MatrixConverter))]
     public
 #endif
     readonly struct Matrix : IEquatable<Matrix>

src/Avalonia.Base/MatrixConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="Matrix"/> from a string representation.
+/// </summary>
+public class MatrixConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? Matrix.Parse(s) : null;
+    }
+}

src/Avalonia.Base/Media/Color.cs

@@ -6,6 +6,7 @@
 // Licensed to The Avalonia Project under MIT License, courtesy of The .NET Foundation.
 
 using System;
+using System.ComponentModel;
 using System.Globalization;
 #if !BUILDTASK
 using Avalonia.Animation.Animators;
@@ -18,6 +19,7 @@ namespace Avalonia.Media
     /// An ARGB color.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(ColorConverter))]
     public
 #endif
     readonly struct Color : IEquatable<Color>

src/Avalonia.Base/Media/ColorConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia.Media;
+
+/// <summary>
+/// Creates a <see cref="Color"/> from a string representation.
+/// </summary>
+public class ColorConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? Color.Parse(s) : null;
+    }
+}

src/Avalonia.Base/Point.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 using System.Numerics;
 #if !BUILDTASK
@@ -12,6 +13,7 @@ namespace Avalonia
     /// Defines a point.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(PointConverter))]
     public
 #endif
     readonly struct Point : IEquatable<Point>

src/Avalonia.Base/PointConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="Thickness"/> from a string representation.
+/// </summary>
+public class PointConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? Point.Parse(s) : null;
+    }
+}

src/Avalonia.Base/Rect.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 using Avalonia.Animation.Animators;
 using Avalonia.Utilities;
@@ -8,6 +9,7 @@ namespace Avalonia
     /// <summary>
     /// Defines a rectangle.
     /// </summary>
+    [TypeConverter(typeof(RectConverter))]
     public readonly struct Rect : IEquatable<Rect>
     {
         static Rect()

src/Avalonia.Base/RectConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="Rect"/> from a string representation.
+/// </summary>
+public class RectConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? Rect.Parse(s) : null;
+    }
+}

src/Avalonia.Base/RelativePoint.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 #if !BUILDTASK
 using Avalonia.Animation.Animators;
@@ -12,6 +13,7 @@ namespace Avalonia
     /// <see cref="RelativeRect"/>.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(RelativePointConverter))]
     public
 #endif
     enum RelativeUnit

src/Avalonia.Base/RelativePointConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="RelativePoint"/> from a string representation.
+/// </summary>
+public class RelativePointConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? RelativePoint.Parse(s) : null;
+    }
+}

src/Avalonia.Base/Size.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 #if !BUILDTASK
 using Avalonia.Animation.Animators;
@@ -11,6 +12,7 @@ namespace Avalonia
     /// Defines a size.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(SizeConverter))]
     public
 #endif
     readonly struct Size : IEquatable<Size>

src/Avalonia.Base/SizeConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="Size"/> from a string representation.
+/// </summary>
+public class SizeConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? Size.Parse(s) : null;
+    }
+}

src/Avalonia.Base/Thickness.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel;
 using System.Globalization;
 #if !BUILDTASK
 using Avalonia.Animation.Animators;
@@ -11,6 +12,7 @@ namespace Avalonia
     /// Describes the thickness of a frame around a rectangle.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(ThicknessConverter))]
     public
 #endif
     readonly struct Thickness : IEquatable<Thickness>

src/Avalonia.Base/ThicknessConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia;
+
+/// <summary>
+/// Creates a <see cref="Thickness"/> from a string representation.
+/// </summary>
+public class ThicknessConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? Thickness.Parse(s) : null;
+    }
+}

src/Avalonia.Controls/GridLength.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Globalization;
 using Avalonia.Utilities;
 
@@ -33,6 +34,7 @@ namespace Avalonia.Controls
     /// Holds the width or height of a <see cref="Grid"/>'s column and row definitions.
     /// </summary>
 #if !BUILDTASK
+    [TypeConverter(typeof(GridLengthConverter))]
     public
 #endif
     struct GridLength : IEquatable<GridLength>

src/Avalonia.Controls/GridLengthConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace Avalonia.Controls;
+
+/// <summary>
+/// Creates a <see cref="GridLength"/> from a string representation.
+/// </summary>
+public class GridLengthConverter : TypeConverter
+{
+    public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+    {
+        return sourceType == typeof(string);
+    }
+
+    public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object? value)
+    {
+        return value is string s ? GridLength.Parse(s) : null;
+    }
+}