Add notification observer on Mac

SineStriker

2023-12-27 88b5b56b6a67d93208eae3980af2f30da09dd8ae

 src/widgets/widgetwindowagent_p.h

@@ -10,6 +10,7 @@
// version without notice, or may even be removed.
//

#include <QWKCore/qwkconfig.h>
#include <QWKCore/private/windowagentbase_p.h>
#include <QWKWidgets/widgetwindowagent.h>

@@ -25,13 +26,15 @@

        // Host
        QWidget *hostWidget{};

#ifdef Q_OS_MAC
        QWidget *systemButtonAreaWidget{};
        std::unique_ptr<QObject> systemButtonAreaWidgetEventFilter;
#endif

#ifdef Q_OS_WINDOWS
#if defined(Q_OS_WINDOWS) && QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
        void setupWindows10BorderWorkaround();
        std::unique_ptr<QObject> borderHandler;
#endif
    };