Partially finish the bug after window close and reshow

Sine Striker

2024-02-20 2d2fc799bc698ebf7e7c8bcc394366d0d7bf071b

 src/core/contexts/abstractwindowcontext.cpp

@@ -41,7 +41,18 @@
            explicit WindowEventFilter(QWindow *window, AbstractWindowContext *ctx,
                                       QObject *parent = nullptr)
                : QObject(parent), ctx(ctx), window(window) {
                window->installEventFilter(this);
                if (window)
                    window->installEventFilter(this);
            }

            inline void setWindow(QWindow *win) {
                if (auto oldWin = window.data(); oldWin) {
                    oldWin->removeEventFilter(this);
                }
                window = win;
                if (win) {
                    win->installEventFilter(this);
                }
            }

        protected:
@@ -51,7 +62,7 @@

        protected:
            AbstractWindowContext *ctx;
            QWindow *window;
            QPointer<QWindow> window;
        };

    }
@@ -67,11 +78,11 @@
        m_host = host;
        m_delegate.reset(delegate);
        m_winIdChangeEventFilter = std::make_unique<WinIdChangeEventFilter>(host, this);
        m_windowEventFilter = std::make_unique<WindowEventFilter>(m_windowHandle, this);

        m_windowHandle = m_delegate->hostWindow(m_host);
        if (m_windowHandle) {
            winIdChanged();
            m_windowEventFilter = std::make_unique<WindowEventFilter>(m_windowHandle, this);
        }
    }

@@ -248,14 +259,18 @@
    }

    void AbstractWindowContext::notifyWinIdChange() {
        auto oldWindow = m_windowHandle;
        auto windowEventFilter = static_cast<WindowEventFilter *>(m_windowEventFilter.get());
        windowEventFilter->setWindow(nullptr);

        // In Qt6, after QWidget::close() is called, the related QWindow's all surfaces and the
        // platform window will be removed, and the WinId will be set to 0. After that, when the
        // QWidget is shown again, the whole things will be recreated again.
        // As a result, we must update our WindowContext each time the WinId changes.
        m_windowHandle = m_delegate->hostWindow(m_host);
        if (oldWindow == m_windowHandle)
            return;
        m_windowEventFilter.reset();
        winIdChanged();

        if (m_windowHandle) {
            m_windowEventFilter = std::make_unique<WindowEventFilter>(m_windowHandle, this);
            windowEventFilter->setWindow(m_windowHandle);

            // Refresh window attributes
            auto attributes = m_windowAttributes;