From eaf3602bbae71c4debd5bc2529c54b7c73a36c07 Mon Sep 17 00:00:00 2001
From: vesp <vesp@post.cz>
Date: Sat, 22 Nov 2025 22:44:40 +0100
Subject: [PATCH] Add dynamic color palette support

Use Material You dynamic colors derived from wallpaper on Android 12+.
Shows gradient indicator in settings, disabled on older Android versions.
---
 .../bugsy/karemote/data/model/AppSettings.kt  |  1 +
 .../ui/screens/settings/SettingsScreen.kt     | 49 ++++++++++++++-----
 .../java/cz/bugsy/karemote/ui/theme/Theme.kt  |  8 +++
 3 files changed, 47 insertions(+), 11 deletions(-)

diff --git a/app/src/main/java/cz/bugsy/karemote/data/model/AppSettings.kt b/app/src/main/java/cz/bugsy/karemote/data/model/AppSettings.kt
index c5d5007..777798b 100644
--- a/app/src/main/java/cz/bugsy/karemote/data/model/AppSettings.kt
+++ b/app/src/main/java/cz/bugsy/karemote/data/model/AppSettings.kt
@@ -5,6 +5,7 @@ enum class ThemeMode {
 }
 
 enum class ColorTheme(val displayName: String) {
+    DYNAMIC("Dynamic"),
     DEFAULT("Default"),
     BLUE("Blue"),
     GREEN("Green"),
diff --git a/app/src/main/java/cz/bugsy/karemote/ui/screens/settings/SettingsScreen.kt b/app/src/main/java/cz/bugsy/karemote/ui/screens/settings/SettingsScreen.kt
index ff07e2d..c5ff49f 100644
--- a/app/src/main/java/cz/bugsy/karemote/ui/screens/settings/SettingsScreen.kt
+++ b/app/src/main/java/cz/bugsy/karemote/ui/screens/settings/SettingsScreen.kt
@@ -1,5 +1,6 @@
 package cz.bugsy.karemote.ui.screens.settings
 
+import android.os.Build
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
@@ -44,6 +45,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.text.font.FontWeight
@@ -253,24 +255,48 @@ private fun ColorThemeOption(
     isSelected: Boolean,
     onClick: () -> Unit
 ) {
-    val color = when (theme) {
-        ColorTheme.DEFAULT -> DefaultPrimaryLight
-        ColorTheme.BLUE -> BluePrimaryLight
-        ColorTheme.GREEN -> GreenPrimaryLight
-        ColorTheme.ORANGE -> OrangePrimaryLight
-        ColorTheme.PURPLE -> PurplePrimaryLight
-        ColorTheme.RED -> RedPrimaryLight
-    }
+    val isDynamicSupported = Build.VERSION.SDK_INT >= Build.VERSION_CODES.S
+    val isEnabled = theme != ColorTheme.DYNAMIC || isDynamicSupported
 
     Column(
         horizontalAlignment = Alignment.CenterHorizontally,
-        modifier = Modifier.clickable { onClick() }
+        modifier = Modifier
+            .clickable(enabled = isEnabled) { onClick() }
+            .then(if (!isEnabled) Modifier.background(Color.Transparent) else Modifier)
     ) {
         Box(
             modifier = Modifier
                 .size(48.dp)
                 .clip(CircleShape)
-                .background(color)
+                .then(
+                    if (theme == ColorTheme.DYNAMIC) {
+                        Modifier.background(
+                            brush = Brush.sweepGradient(
+                                colors = listOf(
+                                    BluePrimaryLight,
+                                    PurplePrimaryLight,
+                                    RedPrimaryLight,
+                                    OrangePrimaryLight,
+                                    GreenPrimaryLight,
+                                    DefaultPrimaryLight,
+                                    BluePrimaryLight
+                                )
+                            ),
+                            alpha = if (isEnabled) 1f else 0.4f
+                        )
+                    } else {
+                        val color = when (theme) {
+                            ColorTheme.DYNAMIC -> Color.Transparent // won't reach here
+                            ColorTheme.DEFAULT -> DefaultPrimaryLight
+                            ColorTheme.BLUE -> BluePrimaryLight
+                            ColorTheme.GREEN -> GreenPrimaryLight
+                            ColorTheme.ORANGE -> OrangePrimaryLight
+                            ColorTheme.PURPLE -> PurplePrimaryLight
+                            ColorTheme.RED -> RedPrimaryLight
+                        }
+                        Modifier.background(color)
+                    }
+                )
                 .then(
                     if (isSelected) {
                         Modifier.border(3.dp, MaterialTheme.colorScheme.outline, CircleShape)
@@ -292,7 +318,8 @@ private fun ColorThemeOption(
         Spacer(modifier = Modifier.height(4.dp))
         Text(
             text = theme.displayName,
-            style = MaterialTheme.typography.labelSmall
+            style = MaterialTheme.typography.labelSmall,
+            color = if (isEnabled) Color.Unspecified else MaterialTheme.colorScheme.onSurface.copy(alpha = 0.38f)
         )
     }
 }
diff --git a/app/src/main/java/cz/bugsy/karemote/ui/theme/Theme.kt b/app/src/main/java/cz/bugsy/karemote/ui/theme/Theme.kt
index 8011e5c..23c44be 100644
--- a/app/src/main/java/cz/bugsy/karemote/ui/theme/Theme.kt
+++ b/app/src/main/java/cz/bugsy/karemote/ui/theme/Theme.kt
@@ -254,7 +254,15 @@ fun KaRemoteTheme(
         ThemeMode.SYSTEM -> isSystemInDarkTheme()
     }
 
+    val context = LocalContext.current
     val colorScheme = when (colorTheme) {
+        ColorTheme.DYNAMIC -> {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+                if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+            } else {
+                if (darkTheme) DefaultDarkColorScheme else DefaultLightColorScheme
+            }
+        }
         ColorTheme.DEFAULT -> if (darkTheme) DefaultDarkColorScheme else DefaultLightColorScheme
         ColorTheme.BLUE -> if (darkTheme) BlueDarkColorScheme else BlueLightColorScheme
         ColorTheme.GREEN -> if (darkTheme) GreenDarkColorScheme else GreenLightColorScheme