Method globalOnEvent

src/SFML/Window/Win32/WindowImplWin32.cpp:1297–1330

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LRESULT CALLBACK WindowImplWin32::globalOnEvent(HWND handle, UINT message, WPARAM wParam, LPARAM lParam)
{
    // Associate handle and Window instance when the creation message is received
    if (message == WM_CREATE)
    {
        // Get WindowImplWin32 instance (it was passed as the last argument of CreateWindow)
        auto window = reinterpret_cast<LONG_PTR>(reinterpret_cast<CREATESTRUCT*>(lParam)->lpCreateParams);

        // Set as the "user data" parameter of the window
        SetWindowLongPtrW(handle, GWLP_USERDATA, window);
    }

    // Get the WindowImpl instance corresponding to the window handle
    WindowImplWin32* window = handle ? reinterpret_cast<WindowImplWin32*>(GetWindowLongPtr(handle, GWLP_USERDATA)) : nullptr;

    // Forward the event to the appropriate function
    if (window)
    {
        window->processEvent(message, wParam, lParam);

        if (window->m_callback)
            return CallWindowProcW(reinterpret_cast<WNDPROC>(window->m_callback), handle, message, wParam, lParam);
    }

    // We don't forward the WM_CLOSE message to prevent the OS from automatically destroying the window
    if (message == WM_CLOSE)
        return 0;

    // Don't forward the menu system command, so that pressing ALT or F10 doesn't steal the focus
    if ((message == WM_SYSCOMMAND) && (wParam == SC_KEYMENU))
        return 0;

    return DefWindowProcW(handle, message, wParam, lParam);
}

} // namespace sf::priv