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Add dark title bar support for Qt5

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This commit is contained in:
Duncan Ogilvie
2026-02-10 22:47:57 +01:00
parent 7194322831
commit 0b0d9f23e1
2 changed files with 31 additions and 2 deletions
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31
src/main.cpp
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@@ -46,9 +46,22 @@
#ifdef _WIN32
#include <windows.h>
#include <dwmapi.h>
#include <dbghelp.h>
#include <cstdio>
static void setDarkTitleBar(QWidget* widget) {
// Requires Windows 10 1809+ (build 17763)
auto hwnd = reinterpret_cast<HWND>(widget->winId());
BOOL dark = TRUE;
// Attribute 20 = DWMWA_USE_IMMERSIVE_DARK_MODE (build 18985+), 19 for older
DWORD attr = 20;
if (FAILED(DwmSetWindowAttribute(hwnd, attr, &dark, sizeof(dark)))) {
attr = 19;
DwmSetWindowAttribute(hwnd, attr, &dark, sizeof(dark));
}
}
static LONG WINAPI crashHandler(EXCEPTION_POINTERS* ep) {
fprintf(stderr, "\n=== UNHANDLED EXCEPTION ===\n");
fprintf(stderr, "Code : 0x%08lX\n", ep->ExceptionRecord->ExceptionCode);
@@ -118,6 +131,22 @@ static LONG WINAPI crashHandler(EXCEPTION_POINTERS* ep) {
}
#endif
class DarkApp : public QApplication {
public:
using QApplication::QApplication;
bool notify(QObject* receiver, QEvent* event) override {
if (event->type() == QEvent::WindowActivate && receiver->isWidgetType()) {
auto* w = static_cast<QWidget*>(receiver);
if ((w->windowFlags() & Qt::Window) == Qt::Window
&& !w->property("DarkTitleBar").toBool()) {
w->setProperty("DarkTitleBar", true);
setDarkTitleBar(w);
}
}
return QApplication::notify(receiver, event);
}
};
class MenuBarStyle : public QProxyStyle {
public:
using QProxyStyle::QProxyStyle;
@@ -1359,7 +1388,7 @@ int main(int argc, char* argv[]) {
SetUnhandledExceptionFilter(crashHandler);
#endif
QApplication app(argc, argv);
DarkApp app(argc, argv);
app.setApplicationName("ReclassX");
app.setOrganizationName("ReclassX");
app.setStyle("Fusion"); // Fusion style respects dark palette well