Fix bug of window closing and reshowing

Sine Striker

2024-02-23 6c0043c1e3d97398828fbd56448f1cd8ee201e66

 src/core/contexts/win32windowcontext.cpp

@@ -695,12 +695,16 @@
    }

    void Win32WindowContext::winIdChanged(WId winId, WId oldWinId) {
        // Reset the context data
        mouseLeaveBlocked = false;
        lastHitTestResult = WindowPart::Outside;

        // If the original window id is valid, remove all resources related
        if (oldWinId) {
            removeManagedWindow(reinterpret_cast<HWND>(oldWinId));
        }

        if (!m_windowHandle || ! winId) {
        if (!m_windowHandle || !winId) {
            return;
        }

@@ -735,15 +739,11 @@
                                        LRESULT *result) {
        *result = FALSE;

        if (message == WM_DESTROY) {
            qDebug() << "WM_DESTROY";
        }

        // We should skip these messages otherwise we will get crashes.
        // NOTE: WM_QUIT won't be posted to the WindowProc function.
        switch (message) {
            case WM_CLOSE:
            case WM_DESTROY:
            case WM_CLOSE:
            case WM_NCDESTROY:
            // Undocumented messages:
            case WM_UAHDESTROYWINDOW:
@@ -755,20 +755,6 @@

        if (!isValidWindow(hWnd, false, true)) {
            return false;
        }

        switch (message) {
            case WM_NCMOUSELEAVE:
                qDebug() << "WM_NCMOUSELEAVE" << mouseLeaveBlocked;
                break;
            case WM_MOUSEHOVER:
                qDebug() << "WM_MOUSEHOVER" << mouseLeaveBlocked;
                break;
            case WM_NCMOUSEHOVER:
                qDebug() << "WM_NCMOUSEHOVER" << mouseLeaveBlocked;
                break;
            default:
                break;
        }

        // Test snap layout
@@ -1156,8 +1142,6 @@
                    }
                }
                mouseLeaveBlocked = false;
                
                qDebug() << "WM_MOUSELEAVE";
                break;
            }

@@ -1166,7 +1150,6 @@
                // we unset `mouseLeaveBlocked` mark and pretend as if Qt has received
                // WM_MOUSELEAVE.
                if (lastHitTestResult != WindowPart::ChromeButton && mouseLeaveBlocked) {
                    qDebug() << lastHitTestResult << "Track";
                    mouseLeaveBlocked = false;
                    requestForMouseLeaveMessage(hWnd, false);
                }
@@ -1243,19 +1226,14 @@
                        // the above problems would not arise.

                        m_delegate->resetQtGrabbedControl(m_host);

                        // If the mouse moves from chrome buttons to other non-client areas, a
                        // WM_MOUSELEAVE message should be sent.
                        if (mouseLeaveBlocked) {
                            emulateClientAreaMessage(hWnd, message, wParam, lParam,
                                                     WM_NCMOUSELEAVE);
                        }
                    }

                    // We need to make sure we get the right hit-test result when a WM_NCMOUSELEAVE
                    // comes, so we reset it when we receive a WM_NCMOUSEMOVE.

                    // If the mouse is entering the client area, there must be a WM_NCHITTEST
                    // setting it to `Client` before the WM_NCMOUSELEAVE comes; if the mouse is
                    // leaving the window, current window part remains as `Outside`.
                    // lastHitTestResult = WindowPart::Outside;
                }

                if (currentWindowPart == WindowPart::ChromeButton) {
@@ -1287,7 +1265,7 @@
                    // pressing area as HTCLIENT which maybe because of our former retransmission of
                    // WM_NCLBUTTONDOWN, as a result, a WM_NCMOUSELEAVE will come immediately and a
                    // lot of WM_MOUSEMOVE will come if we move the mouse, we should track the mouse
                    // in advance.
                    // in advance. (May be redundant?)
                    if (mouseLeaveBlocked) {
                        mouseLeaveBlocked = false;
                        requestForMouseLeaveMessage(hWnd, false);