From 26826d5a5f93136d00a212c88854217ee2fdbcde Mon Sep 17 00:00:00 2001
From: Vortex2Oblivion <73261680+Vortex2Oblivion@users.noreply.github.com>
Date: Mon, 6 Apr 2026 19:50:42 -0400
Subject: [PATCH] add isLightTheme function
---
src/hxwindowmode/WindowColorMode.hx | 14 +++-
src/hxwindowmode/backend/WindowBackend.hx | 3 +
src/hxwindowmode/backend/build.xml | 1 +
.../backend/src/windowbackend.cpp | 64 +++++++++++++++----
.../backend/src/windowbackend.hpp | 1 +
5 files changed, 69 insertions(+), 14 deletions(-)
diff --git a/src/hxwindowmode/WindowColorMode.hx b/src/hxwindowmode/WindowColorMode.hx
index 8eacb14..b3d0406 100644
--- a/src/hxwindowmode/WindowColorMode.hx
+++ b/src/hxwindowmode/WindowColorMode.hx
@@ -36,7 +36,9 @@ class WindowColorMode {
* Useful for checking if you need to force redraw the window header.
*/
public static var isWindows10(get, never):Bool;
- public static function get_isWindows10():Bool {
+
+ @:noCompletion
+ private static inline function get_isWindows10():Bool {
#if lime
//could use some C++ code but this works too
return (lime.system.System.platformLabel.toLowerCase().indexOf("windows 10") != -1);
@@ -153,9 +155,19 @@ class WindowColorMode {
*/
public static inline function redrawWindowHeader() {
#if lime
+ #if !desktop
+ trace('`redrawWindowHeader` is not available on this platform!');
+ #end
for (i in 0...2) lime.app.Application.current.window.borderless = !lime.app.Application.current.window.borderless;
#end
}
+
+ public static inline function isLightTheme() {
+ #if(!cpp || !windows)
+ trace('`isLightTheme` is not available on this platform!');
+ #end
+ return WindowBackend.isLightTheme();
+ }
}
enum abstract WindowCornerType(Int) {
diff --git a/src/hxwindowmode/backend/WindowBackend.hx b/src/hxwindowmode/backend/WindowBackend.hx
index c92f607..a4c02c0 100644
--- a/src/hxwindowmode/backend/WindowBackend.hx
+++ b/src/hxwindowmode/backend/WindowBackend.hx
@@ -18,4 +18,7 @@ extern class WindowBackend {
@:native("nativeWindowColorMode::updateWindow")
private static function updateWindow():Void;
+
+ @:native("nativeWindowColorMode::isLightTheme")
+ private static function isLightTheme():Bool;
}
diff --git a/src/hxwindowmode/backend/build.xml b/src/hxwindowmode/backend/build.xml
index fd16c4a..e0bea89 100644
--- a/src/hxwindowmode/backend/build.xml
+++ b/src/hxwindowmode/backend/build.xml
@@ -18,5 +18,6 @@
+
\ No newline at end of file
diff --git a/src/hxwindowmode/backend/src/windowbackend.cpp b/src/hxwindowmode/backend/src/windowbackend.cpp
index d5ce4d1..5be5e6d 100644
--- a/src/hxwindowmode/backend/src/windowbackend.cpp
+++ b/src/hxwindowmode/backend/src/windowbackend.cpp
@@ -3,11 +3,14 @@
#ifdef HX_WINDOWS
#include
#include
+#include
+#include
+#include
#endif
bool nativeWindowColorMode::setWindowColorMode(bool isDarkMode)
{
- #ifdef HX_WINDOWS
+#ifdef HX_WINDOWS
HWND window = GetActiveWindow();
int isDark = (isDarkMode ? 1 : 0);
bool hasChanged = (DwmSetWindowAttribute(window, 19, &isDark, sizeof(isDark)) == S_OK);
@@ -19,50 +22,85 @@ bool nativeWindowColorMode::setWindowColorMode(bool isDarkMode)
UpdateWindow(window);
return hasChanged;
- #else
+#else
return false;
- #endif
+#endif
}
void nativeWindowColorMode::setWindowBorderColor(::Array color, bool setHeader, bool setBorder)
{
- #ifdef HX_WINDOWS
+#ifdef HX_WINDOWS
HWND window = GetActiveWindow();
auto finalColor = RGB(color[0], color[1], color[2]);
- if(setHeader)
+ if (setHeader)
DwmSetWindowAttribute(window, 35, &finalColor, sizeof(COLORREF));
- if(setBorder)
+ if (setBorder)
DwmSetWindowAttribute(window, 34, &finalColor, sizeof(COLORREF));
UpdateWindow(window);
- #endif
+#endif
}
void nativeWindowColorMode::setWindowTitleColor(::Array color)
{
- #ifdef HX_WINDOWS
+#ifdef HX_WINDOWS
HWND window = GetActiveWindow();
auto finalColor = RGB(color[0], color[1], color[2]);
DwmSetWindowAttribute(window, 36, &finalColor, sizeof(COLORREF));
UpdateWindow(window);
- #endif
+#endif
}
void nativeWindowColorMode::setWindowCornerType(int cornerType)
{
- #ifdef HX_WINDOWS
+#ifdef HX_WINDOWS
HWND window = GetActiveWindow();
DwmSetWindowAttribute(window, 33, &cornerType, sizeof(cornerType));
UpdateWindow(window);
- #endif
+#endif
}
void nativeWindowColorMode::updateWindow()
{
- #ifdef HX_WINDOWS
+#ifdef HX_WINDOWS
UpdateWindow(GetActiveWindow());
- #endif
+#endif
+}
+
+/**
+ * @see https://stackoverflow.com/questions/51334674/how-to-detect-windows-10-light-dark-mode-in-win32-application
+ */
+bool nativeWindowColorMode::isLightTheme()
+{
+#ifdef HX_WINDOWS
+ // The value is expected to be a REG_DWORD, which is a signed 32-bit little-endian
+ auto buffer = std::vector(4);
+ auto cbData = static_cast(buffer.size() * sizeof(char));
+ auto res = RegGetValueW(
+ HKEY_CURRENT_USER,
+ L"Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
+ L"AppsUseLightTheme",
+ RRF_RT_REG_DWORD, // expected value type
+ nullptr,
+ buffer.data(),
+ &cbData);
+
+ if (res != ERROR_SUCCESS)
+ {
+ throw std::runtime_error("Error: error_code=" + std::to_string(res));
+ }
+
+ // convert bytes written to our buffer to an int, assuming little-endian
+ auto i = int(buffer[3] << 24 |
+ buffer[2] << 16 |
+ buffer[1] << 8 |
+ buffer[0]);
+
+ return i == 1;
+#else
+ return false;
+#endif
}
\ No newline at end of file
diff --git a/src/hxwindowmode/backend/src/windowbackend.hpp b/src/hxwindowmode/backend/src/windowbackend.hpp
index 52ab1cd..9bd03da 100644
--- a/src/hxwindowmode/backend/src/windowbackend.hpp
+++ b/src/hxwindowmode/backend/src/windowbackend.hpp
@@ -9,4 +9,5 @@ namespace nativeWindowColorMode
void setWindowTitleColor(::Array color);
void setWindowCornerType(int cornerType);
void updateWindow();
+ bool isLightTheme();
}
\ No newline at end of file