move method ChangeAccentColor to App.xaml.cs

src/Starward/App.xaml.cs

@@ -1,13 +1,17 @@
 // Copyright (c) Microsoft Corporation and Contributors.
 // Licensed under the MIT License.
 
+using CommunityToolkit.WinUI.Helpers;
+using Microsoft.UI;
 using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Media;
 using Microsoft.Windows.AppLifecycle;
 using Starward.Services;
 using System;
 using System.Globalization;
 using System.IO;
 using Vanara.PInvoke;
+using Windows.UI;
 
 // To learn more about WinUI, the WinUI project structure,
 // and more about our project templates, see: http://aka.ms/winui-project-info.
@@ -137,5 +141,97 @@ private void InitializeLanguage()
 
 
 
+    #region Accent Color
+
+
+
+    private static Color ColorMix(Color input, Color blend, double percent)
+    {
+        return Color.FromArgb(255,
+                              (byte)(input.R * percent + blend.R * (1 - percent)),
+                              (byte)(input.G * percent + blend.G * (1 - percent)),
+                              (byte)(input.B * percent + blend.B * (1 - percent)));
+    }
+
+
+
+    public static void ChangeAccentColor(ElementTheme theme, Color? backColor = null, Color? foreColor = null)
+    {
+        try
+        {
+            var colors = new Color[14];
+            if (backColor != null && foreColor != null)
+            {
+                colors[0] = backColor.Value;
+                for (int i = 1; i < 4; i++)
+                {
+                    double percent = 1 - 0.2 * i;
+                    colors[i] = ColorMix(backColor.Value, Colors.White, percent);
+                }
+                for (int i = 4; i < 7; i++)
+                {
+                    double percent = 1 - 0.2 * (i - 3);
+                    colors[i] = ColorMix(backColor.Value, Colors.Black, percent);
+                }
+
+                colors[7] = foreColor.Value;
+                for (int i = 8; i < 11; i++)
+                {
+                    double percent = 1 - 0.2 * (i - 7);
+                    colors[i] = ColorMix(foreColor.Value, Colors.White, percent);
+                }
+                for (int i = 11; i < 14; i++)
+                {
+                    double percent = 1 - 0.2 * (i - 10);
+                    colors[i] = ColorMix(foreColor.Value, Colors.Black, percent);
+                }
+                AppConfig.AccentColor = backColor.Value.ToHex() + foreColor.Value.ToHex();
+            }
+            else
+            {
+                var setting = new Windows.UI.ViewManagement.UISettings();
+                colors[0] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.Accent);
+                colors[1] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.AccentLight1);
+                colors[2] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.AccentLight2);
+                colors[3] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.AccentLight3);
+                colors[4] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.AccentDark1);
+                colors[5] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.AccentDark2);
+                colors[6] = setting.GetColorValue(Windows.UI.ViewManagement.UIColorType.AccentDark3);
+                colors[7] = colors[0];
+                colors[8] = colors[1];
+                colors[9] = colors[2];
+                colors[10] = colors[3];
+                colors[11] = colors[4];
+                colors[12] = colors[5];
+                colors[13] = colors[6];
+            }
+            if (theme is ElementTheme.Dark)
+            {
+                Application.Current.Resources["SystemAccentColor"] = colors[0];
+                Application.Current.Resources["SystemAccentColorLight1"] = colors[1];
+                Application.Current.Resources["SystemAccentColorLight2"] = colors[2];
+                Application.Current.Resources["SystemAccentColorLight3"] = colors[3];
+                Application.Current.Resources["AccentTextFillColorPrimaryBrush"] = new SolidColorBrush(colors[10]);
+                Application.Current.Resources["AccentTextFillColorSecondaryBrush"] = new SolidColorBrush(colors[10]);
+                Application.Current.Resources["AccentTextFillColorTertiaryBrush"] = new SolidColorBrush(colors[9]);
+            }
+            if (theme is ElementTheme.Light)
+            {
+                Application.Current.Resources["SystemAccentColor"] = colors[0];
+                Application.Current.Resources["SystemAccentColorDark1"] = colors[4];
+                Application.Current.Resources["SystemAccentColorDark2"] = colors[5];
+                Application.Current.Resources["SystemAccentColorDark3"] = colors[6];
+                Application.Current.Resources["AccentTextFillColorPrimaryBrush"] = new SolidColorBrush(colors[12]);
+                Application.Current.Resources["AccentTextFillColorSecondaryBrush"] = new SolidColorBrush(colors[13]);
+                Application.Current.Resources["AccentTextFillColorTertiaryBrush"] = new SolidColorBrush(colors[11]);
+            }
+        }
+        catch { }
+    }
+
+
+    #endregion
+
+
 
 }

src/Starward/MyWindows/WindowEx.cs

@@ -13,9 +13,9 @@ public abstract class WindowEx : Window
 {
 
 
-    public IntPtr WindowHandle { get; init; }
+    public IntPtr WindowHandle { get; private init; }
 
-    public IntPtr BridgeHandle { get; init; }
+    public IntPtr BridgeHandle { get; private init; }
 
 
     public double UIScale => User32.GetDpiForWindow(WindowHandle) / 96d;
@@ -239,6 +239,29 @@ public void SetDragRectangles(params RectInt32[] value)
     #endregion
 
 
+    #region Accent Color
+
+
+    public virtual void ChangeAccentColor(Color? backColor = null, Color? foreColor = null)
+    {
+        if (Content is FrameworkElement element)
+        {
+            App.ChangeAccentColor(element.ActualTheme, backColor, foreColor);
+            if (element.ActualTheme is ElementTheme.Dark)
+            {
+                element.RequestedTheme = ElementTheme.Light;
+                element.RequestedTheme = ElementTheme.Default;
+            }
+            if (element.ActualTheme is ElementTheme.Light)
+            {
+                element.RequestedTheme = ElementTheme.Dark;
+                element.RequestedTheme = ElementTheme.Default;
+            }
+        }
+    }
+
+
+    #endregion
 
 
 }