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Support Windows 10 Dark Mode partially #1019

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Support Windows 10 Dark Mode partially #1019

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82 changes: 82 additions & 0 deletions src/gui/mainwindow.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,86 @@
#include <QStyleFactory>
#include <QToolBar>

#ifdef Q_OS_WIN
#include <Windows.h>
#include <dwmapi.h>
#pragma comment (lib, "Dwmapi.lib")
#endif

namespace NeovimQt {

#ifdef Q_OS_WIN
enum PreferredAppMode {
Default,
AllowDark,
ForceDark,
ForceLight,
Max
};

enum WINDOWCOMPOSITIONATTRIB {
WCA_UNDEFINED = 0,
WCA_NCRENDERING_ENABLED = 1,
WCA_NCRENDERING_POLICY = 2,
WCA_TRANSITIONS_FORCEDISABLED = 3,
WCA_ALLOW_NCPAINT = 4,
WCA_CAPTION_BUTTON_BOUNDS = 5,
WCA_NONCLIENT_RTL_LAYOUT = 6,
WCA_FORCE_ICONIC_REPRESENTATION = 7,
WCA_EXTENDED_FRAME_BOUNDS = 8,
WCA_HAS_ICONIC_BITMAP = 9,
WCA_THEME_ATTRIBUTES = 10,
WCA_NCRENDERING_EXILED = 11,
WCA_NCADORNMENTINFO = 12,
WCA_EXCLUDED_FROM_LIVEPREVIEW = 13,
WCA_VIDEO_OVERLAY_ACTIVE = 14,
WCA_FORCE_ACTIVEWINDOW_APPEARANCE = 15,
WCA_DISALLOW_PEEK = 16,
WCA_CLOAK = 17,
WCA_CLOAKED = 18,
WCA_ACCENT_POLICY = 19,
WCA_FREEZE_REPRESENTATION = 20,
WCA_EVER_UNCLOAKED = 21,
WCA_VISUAL_OWNER = 22,
WCA_HOLOGRAPHIC = 23,
WCA_EXCLUDED_FROM_DDA = 24,
WCA_PASSIVEUPDATEMODE = 25,
WCA_USEDARKMODECOLORS = 26,
WCA_LAST = 27
};

struct WINDOWCOMPOSITIONATTRIBDATA {
WINDOWCOMPOSITIONATTRIB Attrib;
PVOID pvData;
SIZE_T cbData;
};

using fnAllowDarkModeForWindow = BOOL (WINAPI *)(HWND hWnd, BOOL allow);
using fnSetPreferredAppMode = PreferredAppMode (WINAPI *)(PreferredAppMode appMode);
using fnSetWindowCompositionAttribute = BOOL (WINAPI *)(HWND hwnd, WINDOWCOMPOSITIONATTRIBDATA *);

static void setDarkTitlebar(HWND hwnd) {
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);
BOOL dark = TRUE;
AllowDarkModeForWindow(hwnd, dark);
WINDOWCOMPOSITIONATTRIBDATA data = {
WCA_USEDARKMODECOLORS,
&dark,
sizeof(dark)
};
SetWindowCompositionAttribute(hwnd, &data);
}
#endif

static QString DefaultWindowTitle() noexcept
{
return "Neovim";
Expand All @@ -28,6 +106,10 @@ MainWindow::MainWindow(NeovimConnector* c, QWidget* parent) noexcept
setWindowTitle(DefaultWindowTitle());

init(c);

#ifdef Q_OS_WIN
setDarkTitlebar(reinterpret_cast<HWND>(winId()));
#endif
}

void MainWindow::init(NeovimConnector *c)
Expand Down