feat: add generic thickness/cornerradius converter.

2023-07-28 00:34:06 +08:00
parent 4c597a5d1c
commit 45b2f5eb41
5 changed files with 191 additions and 11 deletions
--- a/src/Ursa/Converters/ThicknessConverter.cs
+++ b/src/Ursa/Converters/ThicknessConverter.cs
@@ -0,0 +1,91 @@
+using System.Globalization;
+using Avalonia;
+using Avalonia.Data.Converters;
+
+namespace Ursa.Converters;
+
+[Flags]
+public enum ThicknessPosition
+{
+    Left = 1,
+    Top = 2,
+    Right = 4,
+    Bottom = 8,
+    TopLeft = 3,
+    TopRight = 6,
+    BottomLeft = 9,
+    BottomRight = 12,
+}
+
+public class ThicknessExcludeConverter: IValueConverter
+{
+    public static ThicknessExcludeConverter Left { get; } = new( ThicknessPosition.Left );
+    public static ThicknessExcludeConverter Top { get; } = new( ThicknessPosition.Top );
+    public static ThicknessExcludeConverter Right { get; } = new( ThicknessPosition.Right );
+    public static ThicknessExcludeConverter Bottom { get; } = new( ThicknessPosition.Bottom );
+    public static ThicknessExcludeConverter TopLeft { get; } = new( ThicknessPosition.TopLeft );
+    public static ThicknessExcludeConverter TopRight { get; } = new( ThicknessPosition.TopRight );
+    public static ThicknessExcludeConverter BottomLeft { get; } = new( ThicknessPosition.BottomLeft );
+    public static ThicknessExcludeConverter BottomRight { get; } = new( ThicknessPosition.BottomRight );
+
+    private readonly ThicknessPosition _position;
+    public ThicknessExcludeConverter(ThicknessPosition position)
+    {
+        _position = position;
+    }
+    
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is Thickness t)
+        {
+            double left = _position.HasFlag(ThicknessPosition.Left) ?  0d: t.Left;
+            double top = _position.HasFlag(ThicknessPosition.Top) ? 0d : t.Top;
+            double right = _position.HasFlag(ThicknessPosition.Right) ? 0d : t.Right;
+            double bottom = _position.HasFlag(ThicknessPosition.Bottom) ? 0d : t.Bottom;
+
+            return new Thickness(left, top, right, bottom);
+        }
+        return AvaloniaProperty.UnsetValue;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}
+
+public class ThicknessIncludeConverter: IValueConverter
+{
+    public static ThicknessIncludeConverter Left { get; } = new( ThicknessPosition.Left );
+    public static ThicknessIncludeConverter Top { get; } = new( ThicknessPosition.Top );
+    public static ThicknessIncludeConverter Right { get; } = new( ThicknessPosition.Right );
+    public static ThicknessIncludeConverter Bottom { get; } = new( ThicknessPosition.Bottom );
+    public static ThicknessIncludeConverter TopLeft { get; } = new( ThicknessPosition.TopLeft );
+    public static ThicknessIncludeConverter TopRight { get; } = new( ThicknessPosition.TopRight );
+    public static ThicknessIncludeConverter BottomLeft { get; } = new( ThicknessPosition.BottomLeft );
+    public static ThicknessIncludeConverter BottomRight { get; } = new( ThicknessPosition.BottomRight );
+
+    private readonly ThicknessPosition _position;
+    public ThicknessIncludeConverter(ThicknessPosition position)
+    {
+        _position = position;
+    }
+    
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is Thickness t)
+        {
+            var left = _position.HasFlag(ThicknessPosition.Left) ? t.Left : 0d;
+            var top = _position.HasFlag(ThicknessPosition.Top) ? t.Top : 0d;
+            var right = _position.HasFlag(ThicknessPosition.Right) ? t.Right : 0d;
+            var bottom = _position.HasFlag(ThicknessPosition.Bottom) ? t.Bottom : 0d;
+            return new Thickness(left, top, right, bottom);
+        }
+        return AvaloniaProperty.UnsetValue;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}