Optimize Windows 10 border handling

Sine Striker

2023-12-25 29901fc2a97eedd3c914f807d1819c9ea7e69973

 examples/mainwindow/mainwindow.cpp

@@ -20,6 +20,10 @@
#include <widgetframe/windowbar.h>
#include <widgetframe/windowbutton.h>

#ifdef Q_OS_WINDOWS
#  include <QWKCore/qwindowkit_windows.h>
#endif

class ClockWidget : public QLabel {
public:
    explicit ClockWidget(QWidget *parent = nullptr) : QLabel(parent) {
@@ -115,6 +119,16 @@
    windowAgent = new QWK::WidgetWindowAgent(this);
    windowAgent->setup(this);

#ifdef Q_OS_WIN
    if (QWK::IsWindows10OrGreater_Real() && !QWK::IsWindows11OrGreater_Real()) {
        // windowAgent->setWindowAttribute(QStringLiteral("dark-mode"), true);

        // https://github.com/microsoft/terminal/blob/71a6f26e6ece656084e87de1a528c4a8072eeabd/src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp#L940
        // Must call DWM API to extend top frame to client area
        windowAgent->setWindowAttribute(QStringLiteral("extra-margins"), true);
    }
#endif

    // 2. Construct your title bar
    auto menuBar = [this]() {
        auto menuBar = new QMenuBar();
@@ -153,8 +167,7 @@
        auto acrylicAction = new QAction(tr("Enable acrylic material"), menuBar);
        acrylicAction->setCheckable(true);
        connect(acrylicAction, &QAction::triggered, this, [this](bool checked) {
            if (!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);
@@ -299,10 +312,6 @@
    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"));