From 859307d7a590873d8df5f8094e13043370fccaa7 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@qt.io>
Date: Wed, 25 Sep 2019 15:04:36 +0200
Subject: Windows QPA: Provide an experimental palette for dark mode

Provide a simple palette for dark mode, implementing
dark mode support level 2.

Task-number: QTBUG-72028
Change-Id: I6f71870b251ccb7da30c01abb22c224e600f2b27
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
---
 src/widgets/styles/qwindowsstyle.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/widgets/styles/qwindowsstyle.cpp')

diff --git a/src/widgets/styles/qwindowsstyle.cpp b/src/widgets/styles/qwindowsstyle.cpp
index 8496a2c223..497afd17e1 100644
--- a/src/widgets/styles/qwindowsstyle.cpp
+++ b/src/widgets/styles/qwindowsstyle.cpp
@@ -84,6 +84,7 @@
 #include <qpa/qplatformscreen.h>
 #include <private/qguiapplication_p.h>
 #include <private/qhighdpiscaling_p.h>
+#include <qpa/qplatformnativeinterface.h>
 #include <private/qwidget_p.h>
 
 #include <private/qstylehelper_p.h>
@@ -127,6 +128,22 @@ qreal QWindowsStylePrivate::appDevicePixelRatio()
     return qApp->devicePixelRatio();
 }
 
+bool QWindowsStylePrivate::isDarkMode()
+{
+    bool result = false;
+#ifdef Q_OS_WIN
+    // Windows only: Return whether dark mode style support is desired and
+    // dark mode is in effect.
+    if (auto ni = QGuiApplication::platformNativeInterface()) {
+        const QVariant darkModeStyleP = ni->property("darkModeStyle");
+        result = darkModeStyleP.type() == QVariant::Bool
+                 && darkModeStyleP.value<bool>()
+                 && ni->property("darkMode").value<bool>();
+    }
+#endif
+    return result;
+}
+
 // Returns \c true if the toplevel parent of \a widget has seen the Alt-key
 bool QWindowsStylePrivate::hasSeenAlt(const QWidget *widget) const
 {
-- 
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