From a75eca60737256f2b457bcde8312f0436a71a488 Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Sat, 18 Jan 2025 17:12:27 +0100
Subject: [PATCH] Fix applying darkmode under Android

---
 tray/gui/qml/Main.qml  |  3 +++
 tray/gui/quick/app.cpp | 33 +++++++++++++++++++++++++++++++--
 tray/gui/quick/app.h   |  1 +
 3 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/tray/gui/qml/Main.qml b/tray/gui/qml/Main.qml
index 76fed8a9..70eceab3 100644
--- a/tray/gui/qml/Main.qml
+++ b/tray/gui/qml/Main.qml
@@ -16,6 +16,7 @@ ApplicationWindow {
     Material.theme: App.darkmodeEnabled ? Material.Dark : Material.Light
     Material.primary: pageStack.currentPage.isDangerous ? Material.Red : Material.LightBlue
     Material.accent: Material.primary
+    Material.onForegroundChanged: App.setPalette(Material.foreground, Material.background)
     header: ToolBar {
         Material.theme: Material.Dark
         ColumnLayout {
@@ -412,6 +413,8 @@ ApplicationWindow {
 
     // handle global keyboard and mouse events
     Component.onCompleted: {
+        App.setPalette(Material.foreground, Material.background);
+
         window.contentItem.forceActiveFocus(Qt.ActiveWindowFocusReason);
         window.contentItem.Keys.released.connect((event) => {
             const key = event.key;
diff --git a/tray/gui/quick/app.cpp b/tray/gui/quick/app.cpp
index fb229745..0ab44d04 100644
--- a/tray/gui/quick/app.cpp
+++ b/tray/gui/quick/app.cpp
@@ -59,6 +59,16 @@
 #define SYNCTHING_APP_PATH_CONVERSION(s) QString::fromLocal8Bit(s.string())
 #endif
 
+#ifdef Q_OS_ANDROID
+#define SYNCTHING_APP_HANDLE_DARK_MODE_CHANGED_EXPLICITLY
+#endif
+
+#ifdef SYNCTHING_APP_HANDLE_DARK_MODE_CHANGED_EXPLICITLY
+#define SYNCTHING_APP_IS_PALETTE_DARK(palette) false
+#else
+#define SYNCTHING_APP_IS_PALETTE_DARK(palette) QtUtilities::isPaletteDark(palette)
+#endif
+
 using namespace Data;
 
 namespace QtGui {
@@ -121,7 +131,7 @@ App::App(bool insecure, QObject *parent)
 #endif
     , m_darkmodeEnabled(false)
     , m_darkColorScheme(false)
-    , m_darkPalette(QtUtilities::isPaletteDark())
+    , m_darkPalette(SYNCTHING_APP_IS_PALETTE_DARK(m_app->palette()))
     , m_isGuiLoaded(false)
     , m_alwaysUnloadGuiWhenHidden(false)
     , m_unloadGuiWhenHidden(false)
@@ -556,8 +566,10 @@ bool App::eventFilter(QObject *object, QEvent *event)
             if (m_imageProvider) {
                 m_imageProvider->setDefaultColor(palette.color(QPalette::Normal, QPalette::Text));
             }
+#ifndef SYNCTHING_APP_HANDLE_DARK_MODE_CHANGED_EXPLICITLY
+            applyDarkmodeChange(m_darkColorScheme, SYNCTHING_APP_IS_PALETTE_DARK(palette));
+#endif
         }
-        applyDarkmodeChange(m_darkColorScheme, QtUtilities::isPaletteDark());
         break;
     default:;
     }
@@ -1017,6 +1029,23 @@ bool App::minimize()
     return true;
 }
 
+void App::setPalette(const QColor &foreground, const QColor &background)
+{
+#ifdef SYNCTHING_APP_HANDLE_DARK_MODE_CHANGED_EXPLICITLY
+    if (m_app) {
+        auto palette = m_app->palette();
+        palette.setColor(QPalette::Active, QPalette::Text, foreground);
+        palette.setColor(QPalette::Active, QPalette::Base, background);
+        palette.setColor(QPalette::Active, QPalette::WindowText, foreground);
+        palette.setColor(QPalette::Active, QPalette::Window, background);
+        m_app->setPalette(palette);
+    }
+#else
+    Q_UNUSED(foreground)
+    Q_UNUSED(background)
+#endif
+}
+
 bool App::openSettings()
 {
     if (!m_settingsDir.has_value()) {
diff --git a/tray/gui/quick/app.h b/tray/gui/quick/app.h
index b1de013b..4c0998c6 100644
--- a/tray/gui/quick/app.h
+++ b/tray/gui/quick/app.h
@@ -251,6 +251,7 @@ class App : public QObject {
     Q_INVOKABLE QString dirDisplayName(const QString &id) const;
     Q_INVOKABLE QVariantList computeDirsNeedingItems(const QModelIndex &devProxyModelIndex) const;
     Q_INVOKABLE bool minimize();
+    Q_INVOKABLE void setPalette(const QColor &foreground, const QColor &background);
 
 Q_SIGNALS:
     void darkmodeEnabledChanged(bool darkmodeEnabled);