Method WindowProcedure

GTE/Applications/MSW/WindowSystem.cpp:213–492

}

LRESULT CALLBACK WindowSystem::WindowProcedure(HWND handle, UINT message,
    WPARAM wParam, LPARAM lParam)
{
    auto iter = TheWindowSystem.mHandleMap.find(handle);
    if (iter == TheWindowSystem.mHandleMap.end())
    {
        return DefWindowProc(handle, message, wParam, lParam);
    }

    Window& window = *iter->second;

    LRESULT lResult = 0;
    if (window.OnWindowsMessage(handle, message, wParam, lParam, lResult))
    {
        // The 'window' does not want the message interpreted by the switch
        // statement below.
        return lResult;
    }

    switch (message)
    {
    case WM_PAINT:
    {
        PAINTSTRUCT ps;
        BeginPaint(handle, &ps);
        window.OnDisplay();
        EndPaint(handle, &ps);
        return 0;
    }
    case WM_ERASEBKGND:
    {
        // This tells Windows not to erase the background (and that the
        // application is doing so).
        return 1;
    }
    case WM_MOVE:
    {
        // Get the origin of the moved window.  The y-value for window
        // moves is left-handed.
        int32_t x, y;
        Extract(lParam, x, y);
        window.OnMove(x, y);
        return 0;
    }
    case WM_SIZE:
    {
        // Get the new size of the window.
        int32_t xSize, ySize;
        Extract(lParam, xSize, ySize);

        if (wParam == SIZE_MINIMIZED)
        {
            // assert:  xSize == 0 and ySize == 0
            window.OnMinimize();
        }
        else if (wParam == SIZE_MAXIMIZED)
        {
            window.OnMaximize();