Add SixteenColorPalette

4 years ago · fe2d51b111
1 changed files with 302 additions and 0 deletions
--- a/src/Avalonia.Controls.ColorPicker/ColorPalette/SixteenColorPalette.cs
+++ b/src/Avalonia.Controls.ColorPicker/ColorPalette/SixteenColorPalette.cs
@ -0,0 +1,302 @@
+using Avalonia.Media;
+using Avalonia.Utilities;
+
+namespace Avalonia.Controls
+{
+    /// <summary>
+    /// Implements the standard sixteen color palette from the HTML 4.01 specification.
+    /// </summary>
+    /// <remarks>
+    /// See https://en.wikipedia.org/wiki/Web_colors#HTML_color_names.
+    /// </remarks>
+    public class SixteenColorPalette : IColorPalette
+    {
+        // The 16 standard colors from HTML and early Windows computers
+        // https://en.wikipedia.org/wiki/List_of_software_palettes
+        // https://en.wikipedia.org/wiki/Web_colors#HTML_color_names
+        private static Color[,] colorChart = new Color[,]
+        {
+            {
+                Colors.White,
+                Colors.Silver
+            },
+            {
+                Colors.Gray,
+                Colors.Black
+            },
+            {
+                Colors.Red,
+                Colors.Maroon
+            },
+            {
+                Colors.Yellow,
+                Colors.Olive
+            },
+            {
+                Colors.Lime,
+                Colors.Green
+            },
+            {
+                Colors.Aqua,
+                Colors.Teal
+            },
+            {
+                Colors.Blue,
+                Colors.Navy
+            },
+            {
+                Colors.Fuchsia,
+                Colors.Purple
+            }
+        };
+
+        /// <summary>
+        /// Gets the index of the default shade of colors in this palette.
+        /// </summary>
+        public const int DefaultShadeIndex = 0;
+
+        /// <summary>
+        /// The index in the color palette of the 'White' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int WhiteIndex = 0;
+
+        /// <summary>
+        /// The index in the color palette of the 'Silver' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int SilverIndex = 1;
+
+        /// <summary>
+        /// The index in the color palette of the 'Gray' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int GrayIndex = 2;
+
+        /// <summary>
+        /// The index in the color palette of the 'Black' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int BlackIndex = 3;
+
+        /// <summary>
+        /// The index in the color palette of the 'Red' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int RedIndex = 4;
+
+        /// <summary>
+        /// The index in the color palette of the 'Maroon' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int MaroonIndex = 5;
+
+        /// <summary>
+        /// The index in the color palette of the 'Yellow' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int YellowIndex = 6;
+
+        /// <summary>
+        /// The index in the color palette of the 'Olive' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int OliveIndex = 7;
+
+        /// <summary>
+        /// The index in the color palette of the 'Lime' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int LimeIndex = 8;
+
+        /// <summary>
+        /// The index in the color palette of the 'Green' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int GreenIndex = 9;
+
+        /// <summary>
+        /// The index in the color palette of the 'Aqua' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int AquaIndex = 10;
+
+        /// <summary>
+        /// The index in the color palette of the 'Teal' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int TealIndex = 11;
+
+        /// <summary>
+        /// The index in the color palette of the 'Blue' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int BlueIndex = 12;
+
+        /// <summary>
+        /// The index in the color palette of the 'Navy' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int NavyIndex = 13;
+
+        /// <summary>
+        /// The index in the color palette of the 'Fuchsia' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int FuchsiaIndex = 14;
+
+        /// <summary>
+        /// The index in the color palette of the 'Purple' color.
+        /// This index can correspond to multiple color shades.
+        /// </summary>
+        public const int PurpleIndex = 15;
+
+        /// <inheritdoc/>
+        public int ColorCount
+        {
+            get => colorChart.GetLength(0);
+        }
+
+        /// <inheritdoc/>
+        public int ShadeCount
+        {
+            get => colorChart.GetLength(1);
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FFFFFFFF.
+        /// </summary>
+        public static Color White
+        {
+            get => colorChart[WhiteIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FFC0C0C0.
+        /// </summary>
+        public static Color Silver
+        {
+            get => colorChart[SilverIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF808080.
+        /// </summary>
+        public static Color Gray
+        {
+            get => colorChart[GrayIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF000000.
+        /// </summary>
+        public static Color Black
+        {
+            get => colorChart[BlackIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FFFF0000.
+        /// </summary>
+        public static Color Red
+        {
+            get => colorChart[RedIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF800000.
+        /// </summary>
+        public static Color Maroon
+        {
+            get => colorChart[MaroonIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FFFFFF00.
+        /// </summary>
+        public static Color Yellow
+        {
+            get => colorChart[YellowIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF808000.
+        /// </summary>
+        public static Color Olive
+        {
+            get => colorChart[OliveIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF00FF00.
+        /// </summary>
+        public static Color Lime
+        {
+            get => colorChart[LimeIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF008000.
+        /// </summary>
+        public static Color Green
+        {
+            get => colorChart[GreenIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF00FFFF.
+        /// </summary>
+        public static Color Aqua
+        {
+            get => colorChart[AquaIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF008080.
+        /// </summary>
+        public static Color Teal
+        {
+            get => colorChart[TealIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF0000FF.
+        /// </summary>
+        public static Color Blue
+        {
+            get => colorChart[BlueIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF000080.
+        /// </summary>
+        public static Color Navy
+        {
+            get => colorChart[NavyIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FFFF00FF.
+        /// </summary>
+        public static Color Fuchsia
+        {
+            get => colorChart[FuchsiaIndex, DefaultShadeIndex];
+        }
+
+        /// <summary>
+        /// Gets the palette defined color that has an ARGB value of #FF800080.
+        /// </summary>
+        public static Color Purple
+        {
+            get => colorChart[PurpleIndex, DefaultShadeIndex];
+        }
+
+        /// <inheritdoc/>
+        public Color GetColor(int colorIndex, int shadeIndex)
+        {
+            return colorChart[
+                MathUtilities.Clamp(colorIndex, 0, colorChart.GetLength(0) - 1),
+                MathUtilities.Clamp(shadeIndex, 0, colorChart.GetLength(1) - 1)];
+        }
+    }
+}