mainwnd.c

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    /* Get the window context */
    Info = (PMAIN_WND_INFO)GetWindowLongPtr(hwnd,
                                            GWLP_USERDATA);
    if (Info == NULL && uMsg != WM_CREATE)
    {
        goto HandleDefaultMessage;
    }

    switch (uMsg)
    {
        case WM_CREATE:
        {
            Info = (PMAIN_WND_INFO)(((LPCREATESTRUCT)lParam)->lpCreateParams);

            /* Initialize the main window context */
            Info->hSelf = hwnd;

            SetWindowLongPtr(hwnd,
                             GWLP_USERDATA,
                             (LONG_PTR)Info);

            InitMainWnd(Info);

            /* Show the window */
            ShowWindow(hwnd,
                       Info->nCmdShow);
            /* get the windows position */
            GetWindowRect(hwnd,
                          &wndOldPos);

            break;
        }

        case WM_SIZE:
        {
            MainWndResize(Info,
                          LOWORD(lParam),
                          HIWORD(lParam));
            /* NOTE - do *not* forward this message to DefFrameProc! Otherwise the MDI client
                      will attempt to resize itself */

            break;
        }

        case WM_MOVE:
        {

        }
        break;

        case WM_NOTIFY:
        {

                /* FIXME - handle other notifications */
            break;
        }

        case WM_COMMAND:
        {
            MainWndCommand(Info,
                           LOWORD(wParam),
                           (HWND)lParam);
            goto HandleDefaultMessage;
        }

        case WM_MENUSELECT:
        {
            if (Info->hStatus != NULL)
            {
                if (!MainWndMenuHint(Info,
                                     LOWORD(wParam),
                                     MainMenuHintTable,
                                     sizeof(MainMenuHintTable) / sizeof(MainMenuHintTable[0]),
                                     IDS_HINT_BLANK))
                {
                    MainWndMenuHint(Info,
                                    LOWORD(wParam),
                                    SystemMenuHintTable,
                                    sizeof(SystemMenuHintTable) / sizeof(SystemMenuHintTable[0]),
                                    IDS_HINT_BLANK);
                }
            }
            break;
        }

        case WM_ENTERMENULOOP:
        {
            Info->InMenuLoop = TRUE;
            UpdateMainStatusBar(Info);
            break;
        }

        case WM_EXITMENULOOP:
        {
            Info->InMenuLoop = FALSE;
            UpdateMainStatusBar(Info);
            break;
        }

        case WM_CLOSE:
        {
            DestroyWindow(hwnd);
            break;
        }

        case WM_ENABLE:
        {

            goto HandleDefaultMessage;
        }

        case WM_NCACTIVATE:
        {

            goto HandleDefaultMessage;
        }

        case WM_ACTIVATEAPP:
        {

            goto HandleDefaultMessage;
        }

        case WM_DESTROY:
        {
            DestroyMainWnd(Info);

            /* FIXME: set the windows position in registry*/
            //wndOldPos

            HeapFree(ProcessHeap,
                     0,
                     Info);
            SetWindowLongPtr(hwnd,
                             GWLP_USERDATA,
                             0);

            /* Break the message queue loop */
            PostQuitMessage(0);
            break;
        }

        default:
        {
HandleDefaultMessage:
            if (Info != NULL && Info->hMdiClient != NULL)
            {
                Ret = DefFrameProc(hwnd,
                                   Info->hMdiClient,
                                   uMsg,
                                   wParam,
                                   lParam);
            }
            else
            {
                Ret = DefWindowProc(hwnd,
                                    uMsg,
                                    wParam,
                                    lParam);
            }
            break;
        }
    }

    return Ret;
}

MDI_EDITOR_TYPE
MainWndGetCurrentEditor(PMAIN_WND_INFO MainWnd,
                        PVOID *Info)
{
    MDI_EDITOR_TYPE EditorType;

    if (MainWnd->ActiveEditor != NULL)
    {
        EditorType = *((PMDI_EDITOR_TYPE)MainWnd->ActiveEditor);
        *Info = MainWnd->ActiveEditor;
    }
    else
    {
        EditorType = metUnknown;
        *Info = NULL;
    }

    return EditorType;
}

VOID
MainWndSwitchEditorContext(PMAIN_WND_INFO Info,
                           HWND hDeactivate,
                           HWND hActivate)
{
    PMDI_EDITOR_TYPE EditorType;

    /* FIXME - optimize light weight switching
               when switching from and to an editor of same type */

    if (hDeactivate != NULL)
    {
        EditorType = (PMDI_EDITOR_TYPE)GetWindowLongPtr(hDeactivate,
                                                        GWLP_USERDATA);
        if (EditorType != NULL)
        {
            switch (*EditorType)
            {
                case metImageEditor:
                    SetEditorEnvironment((PEDIT_WND_INFO)EditorType,
                                              FALSE);
                    break;

                default:
                    break;
            }

            Info->ActiveEditor = NULL;
        }
    }

    if (hActivate != NULL)
    {
        EditorType = (PMDI_EDITOR_TYPE)GetWindowLongPtr(hActivate,
                                                        GWLP_USERDATA);
        if (EditorType != NULL)
        {
            Info->ActiveEditor = EditorType;

            switch (*EditorType)
            {
                case metImageEditor:
                    SetEditorEnvironment((PEDIT_WND_INFO)EditorType,
                                              TRUE);
                    break;

                default:
                    break;
            }
        }
    }
}

HWND
CreateMainWindow(LPCTSTR lpCaption,
                 int nCmdShow)
{
    PMAIN_WND_INFO Info;
    HWND hMainWnd = NULL;

    Info = (MAIN_WND_INFO*) HeapAlloc(ProcessHeap,
                     0,
                     sizeof(MAIN_WND_INFO));
    if (Info != NULL)
    {
        ZeroMemory(Info,
                   sizeof(MAIN_WND_INFO));
        Info->nCmdShow = nCmdShow;

        /* FIXME - load the window position from the registry */

        hMainWnd = CreateWindowEx(WS_EX_WINDOWEDGE,
                                  szMainWndClass,
                                  lpCaption,
                                  WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
                                  CW_USEDEFAULT,
                                  CW_USEDEFAULT,
                                  CW_USEDEFAULT,
                                  CW_USEDEFAULT,
                                  NULL,
                                  NULL,
                                  hInstance,
                                  Info);
        if (hMainWnd == NULL)
        {
            HeapFree(ProcessHeap,
                     0,
                     Info);
        }
    }

    return hMainWnd;
}

BOOL
MainWndTranslateMDISysAccel(HWND hwnd,
                            LPMSG lpMsg)
{
    PMAIN_WND_INFO Info;

    /* Get the window context */
    Info = (PMAIN_WND_INFO)GetWindowLongPtr(hwnd,
                                            GWLP_USERDATA);
    if (Info != NULL && Info->hMdiClient != NULL)
    {
        return TranslateMDISysAccel(Info->hMdiClient,
                                    lpMsg);
    }

    return FALSE;
}

BOOL
InitMainWindowImpl(VOID)
{
    WNDCLASSEX wc = {0};

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.lpfnWndProc = MainWndProc;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(hInstance,
                        MAKEINTRESOURCE(IDI_ICON));
    wc.hCursor = LoadCursor(NULL,
                            IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
    wc.lpszMenuName = MAKEINTRESOURCE(IDR_MAINMENU);
    wc.lpszClassName = szMainWndClass;
    wc.hIconSm = (HICON)LoadImage(hInstance,
                                  MAKEINTRESOURCE(IDI_ICON),
                                  IMAGE_ICON,
                                  16,
                                  16,
                                  LR_SHARED);

    return RegisterClassEx(&wc) != (ATOM)0;
}

VOID
UninitMainWindowImpl(VOID)
{
    UnregisterClass(szMainWndClass,
                    hInstance);
}