feat: complete SimpleColorView.

src/Semi.Avalonia.ColorPicker/Converters/ColorToTextConverter.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using Avalonia;
+using Avalonia.Data;
+using Avalonia.Data.Converters;
+using Avalonia.Media;
+
+namespace Semi.Avalonia.ColorPicker.Converters;
+
+public class ColorToTextConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return value is Color color ? $"{color.R},{color.G},{color.B}" : AvaloniaProperty.UnsetValue;
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not string str) return BindingOperations.DoNothing;
+        var parts = str.Split(',');
+        if (parts.Length != 3 || parts.Any(string.IsNullOrWhiteSpace)) return BindingOperations.DoNothing;
+
+        if (byte.TryParse(parts[0], NumberStyles.Integer, CultureInfo.InvariantCulture, out var r) &&
+            byte.TryParse(parts[1], NumberStyles.Integer, CultureInfo.InvariantCulture, out var g) &&
+            byte.TryParse(parts[2], NumberStyles.Integer, CultureInfo.InvariantCulture, out var b))
+        {
+            return new Color(0xFF, r, g, b);
+        }
+
+        return BindingOperations.DoNothing;
+    }
+}

src/Semi.Avalonia.ColorPicker/Converters/HsvColorToTextConverter.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using Avalonia;
+using Avalonia.Data;
+using Avalonia.Data.Converters;
+using Avalonia.Media;
+
+namespace Semi.Avalonia.ColorPicker.Converters;
+
+public class HsvColorToTextConverter : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return value is HsvColor hsvColor
+            ? $"{Math.Round(hsvColor.H)},{Math.Round(hsvColor.S * 100)},{Math.Round(hsvColor.V * 100)}"
+            : AvaloniaProperty.UnsetValue;
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not string str) return BindingOperations.DoNothing;
+        var parts = str.Split(',');
+        if (parts.Length != 3 || parts.Any(string.IsNullOrWhiteSpace)) return BindingOperations.DoNothing;
+
+        if (double.TryParse(parts[0], NumberStyles.Float, CultureInfo.InvariantCulture, out var h) &&
+            double.TryParse(parts[1], NumberStyles.Float, CultureInfo.InvariantCulture, out var s) &&
+            double.TryParse(parts[2], NumberStyles.Float, CultureInfo.InvariantCulture, out var v))
+        {
+            return new HsvColor(1, h, s / 100, v / 100);
+        }
+
+        return BindingOperations.DoNothing;
+    }
+}

src/Semi.Avalonia.ColorPicker/Converters/ToColorModel.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Globalization;
+using Avalonia.Controls;
+using Avalonia.Data.Converters;
+
+namespace Semi.Avalonia.ColorPicker.Converters;
+
+public class ToColorModel : IValueConverter
+{
+    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return parameter is "Hex" && value is "Hex" ||
+               parameter is "Rgba" && value is ColorModel.Rgba ||
+               parameter is "Hsva" && value is ColorModel.Hsva;
+    }
+
+    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}