Derive selection color from accent color (on windows)

core/src/test/java/ui/ComponentDemo.java

@@ -63,6 +63,7 @@ public interface ComponentDemo {
 
     static void showDemo(final ComponentDemo demo, final boolean asDialog) {
         LafManager.enabledPreferenceChangeReporting(false);
+        LafManager.addThemePreferenceChangeListener(LafManager::installTheme);
         LafManager.setDecorationsEnabled(true);
         LafManager.setLogLevel(Level.FINE);
         SwingUtilities.invokeLater(() -> {

windows/src/main/cpp/ThemeInfo.cpp

@@ -24,7 +24,6 @@
  */
 #include "com_github_weisj_darklaf_platform_windows_JNIThemeInfoWindows.h"
 
-#include <iostream>
 #include <string>
 #include <thread>
 #include <atomic>

windows/src/main/java/com/github/weisj/darklaf/platform/windows/WindowsThemePreferenceProvider.java

@@ -24,6 +24,7 @@ package com.github.weisj.darklaf.platform.windows;
 import java.awt.*;
 import java.util.function.Consumer;
 
+import com.github.weisj.darklaf.color.DarkColorModelHSB;
 import com.github.weisj.darklaf.theme.info.*;
 
 public class WindowsThemePreferenceProvider implements ThemePreferenceProvider {
@@ -48,10 +49,18 @@ public class WindowsThemePreferenceProvider implements ThemePreferenceProvider {
         ContrastRule contrastRule = highContrast ? ContrastRule.HIGH_CONTRAST : ContrastRule.STANDARD;
         ColorToneRule toneRule = darkMode ? ColorToneRule.DARK : ColorToneRule.LIGHT;
         FontSizeRule fontSizeRule = FontSizeRule.relativeAdjustment(fontScaling / 100f);
-        AccentColorRule accentColorRule = AccentColorRule.fromColor(createColorFromRGB(accentColorRGB));
+        Color accentColor = createColorFromRGB(accentColorRGB);
+        Color selectionColor = deriveSelectionColor(accentColor);
+        AccentColorRule accentColorRule = AccentColorRule.fromColor(accentColor, selectionColor);
         return new PreferredThemeStyle(contrastRule, toneRule, accentColorRule, fontSizeRule);
     }
 
+    private Color deriveSelectionColor(final Color color) {
+        if (color == null) return null;
+        double[] hsb = DarkColorModelHSB.RGBtoHSBValues(color.getRed(), color.getGreen(), color.getBlue());
+        return DarkColorModelHSB.getColorFromHSBValues(hsb[0], hsb[1] / 2.5, Math.min(1, hsb[2] * 1.2));
+    }
+
     private Color createColorFromRGB(final int rgb) {
         if (rgb == 0) return null;
         return new Color(rgb);
@@ -98,6 +107,12 @@ public class WindowsThemePreferenceProvider implements ThemePreferenceProvider {
         return WindowsLibrary.get().isLoaded();
     }
 
+    @Override
+    public boolean supportsNativeSelectionColor() {
+        // Depends on accent color as it is derived from it.
+        return supportsNativeAccentColor();
+    }
+
     @Override
     public boolean supportsNativeFontSize() {
         return WindowsLibrary.get().isLoaded();