Use brilliant workaround to show Windows 10 top border

Sine Striker

2023-12-24 46285db399f75154ad6c451e12f2cae2e59ace25

 examples/mainwindow/mainwindow.cpp

@@ -115,6 +115,10 @@
    windowAgent = new QWK::WidgetWindowAgent(this);
    windowAgent->setup(this);

#ifdef Q_OS_WIN
    windowAgent->setWindowAttribute(QStringLiteral("dark-mode"), true);
#endif

    // 2. Construct your title bar
    auto menuBar = [this]() {
        auto menuBar = new QMenuBar();
@@ -143,7 +147,9 @@
        auto dwmBlurAction = new QAction(tr("Enable DWM blur"), menuBar);
        dwmBlurAction->setCheckable(true);
        connect(dwmBlurAction, &QAction::triggered, this, [this](bool checked) {
            windowAgent->setWindowAttribute(QStringLiteral("dwm-blur"), checked);
            if (!windowAgent->setWindowAttribute(QStringLiteral("dwm-blur"), checked)) {
                return;
            }
            setProperty("custom-style", checked);
            style()->polish(this);
        });
@@ -151,7 +157,9 @@
        auto acrylicAction = new QAction(tr("Enable acrylic material"), menuBar);
        acrylicAction->setCheckable(true);
        connect(acrylicAction, &QAction::triggered, this, [this](bool checked) {
            windowAgent->setWindowAttribute(QStringLiteral("acrylic-material"), QColor::fromRgbF(1.f, 1.f, 1.f, 0.6f));
            if (!windowAgent->setWindowAttribute(QStringLiteral("acrylic-material"), true)) {
                return;
            }
            setProperty("custom-style", checked);
            style()->polish(this);
        });
@@ -159,7 +167,9 @@
        auto micaAction = new QAction(tr("Enable mica"), menuBar);
        micaAction->setCheckable(true);
        connect(micaAction, &QAction::triggered, this, [this](bool checked) {
            windowAgent->setWindowAttribute(QStringLiteral("mica"), checked);
            if (!windowAgent->setWindowAttribute(QStringLiteral("mica"), checked)) {
                return;
            }
            setProperty("custom-style", checked);
            style()->polish(this);
        });
@@ -167,7 +177,9 @@
        auto micaAltAction = new QAction(tr("Enable mica alt"), menuBar);
        micaAltAction->setCheckable(true);
        connect(micaAltAction, &QAction::triggered, this, [this](bool checked) {
            windowAgent->setWindowAttribute(QStringLiteral("mica-alt"), checked);
            if (!windowAgent->setWindowAttribute(QStringLiteral("mica-alt"), checked)) {
                return;
            }
            setProperty("custom-style", checked);
            style()->polish(this);
        });
@@ -290,10 +302,6 @@
    if (!styleSheet().isEmpty() && theme == currentTheme)
        return;
    currentTheme = theme;

#ifdef Q_OS_WIN
    windowAgent->setWindowAttribute(QStringLiteral("dark-mode"), currentTheme == Dark);
#endif

    if (QFile qss(theme == Dark ? QStringLiteral(":/dark-style.qss")
                                : QStringLiteral(":/light-style.qss"));