pollymc/launcher/ui/WinDarkmode.cpp

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#include <QWidget>
#include "WinDarkmode.h"
namespace WinDarkmode {
/* See https://github.com/statiolake/neovim-qt/commit/da8eaba7f0e38b6b51f3bacd02a8cc2d1f7a34d8 */
void setDarkWinTitlebar(WId winid, bool darkmode)
{
HWND hwnd = reinterpret_cast<HWND>(winid);
BOOL dark = (BOOL) darkmode;
HMODULE hUxtheme = LoadLibraryExW(L"uxtheme.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
HMODULE hUser32 = GetModuleHandleW(L"user32.dll");
fnAllowDarkModeForWindow AllowDarkModeForWindow
= reinterpret_cast<fnAllowDarkModeForWindow>(GetProcAddress(hUxtheme, MAKEINTRESOURCEA(133)));
fnSetPreferredAppMode SetPreferredAppMode
= reinterpret_cast<fnSetPreferredAppMode>(GetProcAddress(hUxtheme, MAKEINTRESOURCEA(135)));
fnSetWindowCompositionAttribute SetWindowCompositionAttribute
= reinterpret_cast<fnSetWindowCompositionAttribute>(GetProcAddress(hUser32, "SetWindowCompositionAttribute"));
SetPreferredAppMode(AllowDark);
AllowDarkModeForWindow(hwnd, dark);
WINDOWCOMPOSITIONATTRIBDATA data = {
WCA_USEDARKMODECOLORS,
&dark,
sizeof(dark)
};
SetWindowCompositionAttribute(hwnd, &data);
}
}