cosmo.cpp

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/*
 * COSMO.CPP
 * Cosmo Chapter 18
 *
 * WinMain and CCosmoFrame implementations.
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  [e-mail]
 * Compuserve:  >INTERNET:[e-mail]
 */


#define INITGUIDS
#include "cosmo.h"

//CHAPTER18MOD
/*
 * These are for proper implementation of the class factory,
 * OLE Documents support, and shutdown conditions.
 */
ULONG g_cObj=0;
ULONG g_cLock=0;
HWND  g_hWnd=NULL;
BOOL  g_fUser=FALSE;
//End CHAPTER18MOD


/*
 * WinMain
 *
 * Purpose:
 *  Main entry point of application.  Should register the app class
 *  if a previous instance has not done so and do any other one-time
 *  initializations.
 */

int PASCAL WinMain (HINSTANCE hInst, HINSTANCE hPrev
    , LPSTR pszCmdLine, int nCmdShow)
    {
    PCCosmoFrame    pFR;
    FRAMEINIT       fi;
    WPARAM          wRet;

    SETMESSAGEQUEUE;

    //Attempt to allocate and initialize the application
    pFR=new CCosmoFrame(hInst, hPrev, pszCmdLine, nCmdShow);

    if (NULL==pFR)
        return -1;

    fi.idsMin=IDS_FRAMEMIN;
    fi.idsMax=IDS_FRAMEMAX;
    fi.idsStatMin=IDS_STATMESSAGEMIN;
    fi.idsStatMax=IDS_STATMESSAGEMAX;
    fi.idStatMenuMin=ID_MENUFILE;
    fi.idStatMenuMax=ID_MENUHELP;
    fi.iPosWindowMenu=WINDOW_MENU;
    fi.cMenus=CMENUS;

    fi.x=CW_USEDEFAULT;
    fi.y=CW_USEDEFAULT;
    fi.cx=440;
    fi.cy=460;

    //If we can initialize pFR, start chugging messages
    if (pFR->Init(&fi))
        wRet=pFR->MessageLoop();

    delete pFR;
    return wRet;
    }



//CHAPTER18MOD
/*
 * ObjectDestroyed
 *
 * Purpose:
 *  Function for the Cosmo Figure object to call when it gets
 *  destroyed.  We destroy the main window if the proper conditions
 *  are met for shutdown.
 */

void ObjectDestroyed(void)
    {
    g_cObj--;

    //No more objects, no locks, no user control, shut the app down.
    if (0L==g_cObj && 0L==g_cLock && IsWindow(g_hWnd) && !g_fUser)
        PostMessage(g_hWnd, WM_CLOSE, 0, 0L);

    return;
    }
//CHAPTER18MOD





/*
 * CCosmoFrame::CCosmoFrame
 * CCosmoFrame::~CCosmoFrame
 *
 * Constructor Parameters:
 *  hInst           HINSTANCE from WinMain
 *  hInstPrev       HINSTANCE from WinMain
 *  pszCmdLine      LPSTR from WinMain
 *  nCmdShow        int from WInMain
 */

CCosmoFrame::CCosmoFrame(HINSTANCE hInst, HINSTANCE hInstPrev
    , LPSTR pszCmdLine, int nCmdShow)
    : CFrame(hInst, hInstPrev, pszCmdLine, nCmdShow)
    {
    UINT        i;

    for (i=0; i<5; i++)
        m_hBmpLines[i]=NULL;

    m_uIDCurLine=0;
    m_fInitialized=FALSE;
    m_pIClassDataTran=NULL;

    //CHAPTER18MOD
    m_fEmbedding=FALSE;
    m_dwRegCO=0;
    m_pIClassFactory=NULL;
    //End CHAPTER18MOD

    return;
    }


CCosmoFrame::~CCosmoFrame(void)
    {
    UINT        i;

    //CHAPTER18MOD
    //Reverse CoRegisterClassObject, takes class factory ref to 1
    if (0L!=m_dwRegCO)
        CoRevokeClassObject(m_dwRegCO);

    ReleaseInterface(m_pIClassFactory);
    //End CHAPTER18MOD

    for (i=0; i<5; i++)
        {
        if (NULL!=m_hBmpLines[i])
            DeleteObject(m_hBmpLines[i]);
        }

    if (NULL!=m_pIClassDataTran)
        {
        m_pIClassDataTran->LockServer(FALSE);
        m_pIClassDataTran->Release();
        }

    OleFlushClipboard();

    if (m_fInitialized)
        OleUninitialize();

    return;
    }




/*
 * CCosmoFrame::Init
 *
 * Purpose:
 *  Call CoInitialize then calling down into the base class
 *  initialization.
 *
 * Parameters:
 *  pFI             PFRAMEINIT containing initialization parameters.
 *
 * Return Value:
 *  BOOL            TRUE if initialization succeeded, FALSE otherwise.
 */

BOOL CCosmoFrame::Init(PFRAMEINIT pFI)
    {
    HRESULT     hr;

    CHECKVER_OLE;

    if (FAILED(OleInitialize(NULL)))
        return FALSE;

    m_fInitialized=TRUE;

    hr=CoGetClassObject(CLSID_DataTransferObject
        , CLSCTX_INPROC_SERVER, NULL, IID_IClassFactory
        , (PPVOID)&m_pIClassDataTran);

    if (SUCCEEDED(hr))
        m_pIClassDataTran->LockServer(TRUE);


    //CHAPTER18MOD
    //Check for command line flags
    ParseCommandLine();

    if (NULL!=m_ppszCmdArgs)
        {
        if(0==lstrcmpi(m_ppszCmdArgs[0], TEXT("-Embedding"))
           || 0==lstrcmpi(m_ppszCmdArgs[0], TEXT("/Embedding")))
            m_fEmbedding=TRUE;
        }

    g_fUser=!m_fEmbedding;


    /*
     * Create our class factory and register it for this application
     * using CoRegisterClassObject.  The REGCLS_*USE flags have to
     * do with servicable object from this instance, not with MDI or
     * SDI.  Since it's most convenient to be single use, we'll do
     * this in either version.
     *
     * In addition, it only makes sense to do any of this if we're
     * being launched to be a server.
     */
    if (m_fEmbedding)
        {
        m_pIClassFactory=new CFigureClassFactory(this);

        if (NULL==m_pIClassFactory)
            return FALSE;

        //Since we hold on to this, we should AddRef it.
        m_pIClassFactory->AddRef();

        hr=CoRegisterClassObject(CLSID_CosmoFigure, m_pIClassFactory
            , CLSCTX_LOCAL_SERVER, REGCLS_SINGLEUSE, &m_dwRegCO);

        if (FAILED(hr))
            return FALSE;
        }
    //End CHAPTER18MOD
    return CFrame::Init(pFI);
    }



/*
 * CCosmoFrame::CreateCClient
 *
 * Purpose:
 *  Constructs a new client specific to the application.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  PCClient        Pointer to the new client object.
 */

PCClient CCosmoFrame::CreateCClient(void)
    {
    return (PCClient)(new CCosmoClient(m_hInst, this));
    }





/*
 * CCosmoFrame::RegisterAllClasses
 *
 * Purpose:
 *  Registers all classes used in this application.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if registration succeeded, FALSE otherwise.
 */

BOOL CCosmoFrame::RegisterAllClasses(void)
    {
    WNDCLASS        wc;

    //First let the standard frame do its thing
    if (!CFrame::RegisterAllClasses())
        return FALSE;

    /*
     * We want a different background color for the document
     * because the Polyline we put in the document will paint
     * with COLOR_WINDOW which by default which is CLASSLIB's
     * default document color.
     */

    GetClassInfo(m_hInst, SZCLASSDOCUMENT, &wc);
    UnregisterClass(SZCLASSDOCUMENT, m_hInst);

    wc.hbrBackground=(HBRUSH)(COLOR_APPWORKSPACE+1);

    if (!RegisterClass(&wc))
        return FALSE;

    //Register the Polyline window.
    wc.style         = CS_HREDRAW | CS_VREDRAW;
    wc.hInstance     = m_hInst;
    wc.cbClsExtra    = 0;
    wc.lpfnWndProc   = PolylineWndProc;
    wc.cbWndExtra    = CBPOLYLINEWNDEXTRA;
    wc.hIcon         = NULL;
    wc.hCursor       = LoadCursor(NULL, IDC_CROSS);
    wc.hbrBackground = NULL;
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = SZCLASSPOLYLINE;

    if (!RegisterClass(&wc))
        return FALSE;

    return TRUE;
    }






/*
 * CCosmoFrame::PreShowInit
 *
 * Purpose:
 *  Called from Init before intially showing the window.  We do
 *  whatever else we want here, modifying nCmdShow as necessary
 *  which affects ShowWindow in Init.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if this initialization succeeded,
 *                  FALSE otherwise.
 */

BOOL CCosmoFrame::PreShowInit(void)
    {
    CreateLineMenu();
    CheckLineSelection(IDM_LINESOLID);

    //CHAPTER18MOD
    //Save the window handle for shutdown if necessary.
    g_hWnd=m_hWnd;

    //If we're under OLE control, don't show the main window.
    if (m_fEmbedding)
        m_nCmdShow=SW_HIDE;
    //End CHAPTER18MOD

    return TRUE;
    }



/*
 * CCosmoFrame::CreateLineMenu
 *
 * Purpose:
 *  Initializes the bitmaps used to create the Line menu and
 *  replaces the text items defined in the application resources
 *  with these bitmaps.  Note that the contents of m_hBmpLines
 *  must be cleaned up when the application terminates.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CCosmoFrame::CreateLineMenu(void)
    {
    HMENU       hMenu;
    HDC         hDC, hMemDC;
    HPEN        hPen;
    HGDIOBJ     hObj;
    TEXTMETRIC  tm;
    UINT        i, cx, cy;


    hMenu=GetSubMenu(GetMenu(m_hWnd), 3);   //Line menu.
    hDC=GetDC(m_hWnd);

    //Create each line in a menu item 8 chars wide, one char high.
    GetTextMetrics(hDC, &tm);
    cx=tm.tmAveCharWidth*8;
    cy=tm.tmHeight;

    /*
     * Create a memory DC in which to draw lines, and bitmaps
     * for each line.
     */
    hMemDC=CreateCompatibleDC(hDC);
    ReleaseDC(m_hWnd, hDC);

    for (i=0; i<5; i++)
        {
        m_hBmpLines[i]=CreateCompatibleBitmap(hMemDC, cx, cy);
        SelectObject(hMemDC, m_hBmpLines[i]);

        PatBlt(hMemDC, 0, 0, cx, cy, WHITENESS);

        hPen=CreatePen(i, 1, 0L);       //i=line style like PS_SOLID
        hObj=SelectObject(hMemDC, hPen);

        MoveToEx(hMemDC, 0, cy/2, NULL);
        LineTo(hMemDC, cx, cy/2);

        ModifyMenu(hMenu, IDM_LINEMIN+i, MF_BYCOMMAND | MF_BITMAP
            , IDM_LINEMIN+i, (LPTSTR)(LONG)(UINT)m_hBmpLines[i]);

        SelectObject(hMemDC, hObj);
        DeleteObject(hPen);
        }

    CheckMenuItem(hMenu, IDM_LINESOLID, MF_CHECKED);
    DeleteDC(hMemDC);

    return;
    }









/*
 * CCosmoFrame::CreateToolbar
 *
 * Purpose:
 *  Procedure to create all the necessary toolbar buttons.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  UINT            Number of tools added to the bar.
 */