AWC: fix window attribute handler

SineStriker

2025-02-11 e9f790d3533ebaee1f782e91b6e13b2c6375c86a

 src/widgets/widgetwindowagent_win.cpp

@@ -8,6 +8,8 @@
#include <QtCore/QDateTime>
#include <QtGui/QPainter>

#include <QtCore/private/qcoreapplication_p.h>

#include <QWKCore/qwindowkit_windows.h>
#include <QWKCore/private/qwkglobal_p.h>
#include <QWKCore/private/windows10borderhandler_p.h>
@@ -53,8 +55,16 @@
        }

        void updateGeometry() override {
            widget->setContentsMargins(isNormalWindow() ? QMargins(0, borderThickness(), 0, 0)
                                                        : QMargins());
            // The window top border is manually painted by QWK so we want to give
            // some margins to avoid it covering real window contents, however, we
            // found that there are some rounding issues for the thin border and
            // thus this small trick doesn't work very well when the DPR is not
            // integer. So far we haven't found a perfect solution, so just don't
            // set any margins. In theory the window content will only be covered
            // by 1px or so, it should not be a serious issue in the real world.
            //
            // widget->setContentsMargins(isNormalWindow() ? QMargins(0, borderThickness(), 0, 0)
            //                                             : QMargins());
        }

        bool isWindowActive() const override {
@@ -62,8 +72,13 @@
        }

        inline void forwardEventToWidgetAndDraw(QWidget *w, QEvent *event) {
            // Let the widget paint first
            static_cast<QObject *>(w)->event(event);
            // https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/widgets/kernel/qapplication.cpp#L3286
            // Deliver the event
            if (!forwardObjectEventFilters(this, w, event)) {
                // Let the widget paint first
                std::ignore = static_cast<QObject *>(w)->event(event);
                QCoreApplicationPrivate::setEventSpontaneous(event, false);
            }

            // Due to the timer or user action, Qt will repaint some regions spontaneously,
            // even if there is no WM_PAINT message, we must wait for it to finish painting
@@ -72,8 +87,13 @@
        }

        inline void forwardEventToWindowAndDraw(QWindow *window, QEvent *event) {
            // Let Qt paint first
            static_cast<QObject *>(window)->event(event);
            // https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/widgets/kernel/qapplication.cpp#L3286
            // Deliver the event
            if (!forwardObjectEventFilters(ctx, window, event)) {
                // Let Qt paint first
                std::ignore = static_cast<QObject *>(window)->event(event);
                QCoreApplicationPrivate::setEventSpontaneous(event, false);
            }

            // Upon receiving the WM_PAINT message, Qt will repaint the entire view, and we
            // must wait for it to finish painting before drawing this top border area.
@@ -93,9 +113,18 @@

                    // Since a QExposeEvent will be sent immediately after the QResizeEvent, we can
                    // simply ignore it.
#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
                    struct ExposeEvent : public QExposeEvent {
                        inline const QRegion &getRegion() const { return m_region; }
                    };
                    auto ee = static_cast<ExposeEvent *>(event);
                    bool exposeRegionValid = !ee->getRegion().isNull();
#else
                    auto ee = static_cast<QExposeEvent *>(event);
                    bool exposeRegionValid = !ee->region().isNull();
#endif
                    auto window = widget->windowHandle();
                    if (window->isExposed() && isNormalWindow() && !ee->region().isNull()) {
                    if (window->isExposed() && isNormalWindow() && exposeRegionValid) {
                        forwardEventToWindowAndDraw(window, event);
                        return true;
                    }