void CCosmoDoc::Undo(void)
    {
    m_pPL->Undo();
    return;
    }






/*
 * CCosmoDoc::Clip
 *
 * Purpose:
 *  Places a private format, a metafile, and a bitmap of the display
 *  on the clipboard, optionally implementing Cut by deleting the
 *  data in the current window after rendering.
 *
 * Parameters:
 *  hWndFrame       HWND of the main window.
 *  fCut            BOOL indicating cut (TRUE) or copy (FALSE).
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CCosmoDoc::Clip(HWND hWndFrame, BOOL fCut)
    {
    BOOL            fRet=TRUE;
    HGLOBAL         hMem;
    UINT            i;

    //This array is so we can loop over the formats we provide.
    static UINT     rgcf[3]={0, CF_METAFILEPICT, CF_BITMAP};
    const UINT      cFormats=3;

    if (!OpenClipboard(hWndFrame))
        return FALSE;

    //Clean out whatever junk is in the clipboard.
    EmptyClipboard();

    rgcf[0]=m_cf;

    for (i=0; i < cFormats; i++)
        {
        //Copy private data first.
        hMem=RenderFormat(rgcf[i]);

        if (NULL!=hMem)
            SetClipboardData(rgcf[i], hMem);
        else
            fRet &=FALSE;
        }

    //Free clipboard ownership.
    CloseClipboard();

    //Delete our current data if copying succeeded.
    if (fRet && fCut)
        {
        m_pPL->New();
        FDirtySet(TRUE);
        }

    return fRet;
    }





/*
 * CCosmoDoc::RenderFormat
 *
 * Purpose:
 *  Renders a specific clipboard format into global memory.
 *
 * Parameters:
 *  cf              UINT format to render.
 *
 * Return Value:
 *  HGLOBAL         Global memory handle containing the data.
 */

HGLOBAL CCosmoDoc::RenderFormat(UINT cf)
    {
    HGLOBAL     hMem;

    if (cf==m_cf)
        {
        m_pPL->DataGetMem(&hMem);
        return hMem;
        }

    switch (cf)
        {
        case CF_METAFILEPICT:
            m_pPL->RenderMetafilePict(&hMem);
            return hMem;

        case CF_BITMAP:
            m_pPL->RenderBitmap((HBITMAP *)&hMem);
            return hMem;
        }

    return NULL;
    }







/*
 * CCosmoDoc::FQueryPaste
 *
 * Purpose:
 *  Determines if we can paste data from the clipboard.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if data is available, FALSE otherwise.
 */

BOOL CCosmoDoc::FQueryPaste(void)
    {
    return IsClipboardFormatAvailable(m_cf);
    }





/*
 * CCosmoDoc::Paste
 *
 * Purpose:
 *  Retrieves the private data format from the clipboard and sets it
 *  to the current figure in the editor window.
 *
 *  Note that if this function is called, then the clipboard format
 *  is available because the Paste menu item is only enabled if the
 *  format is present.
 *
 * Parameters:
 *  hWndFrame       HWND of the main window.
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CCosmoDoc::Paste(HWND hWndFrame)
    {
    HGLOBAL         hMem;
    PPOLYLINEDATA   ppl;
    BOOL            fRet=FALSE;

    if (!OpenClipboard(hWndFrame))
        return FALSE;

    hMem=GetClipboardData(m_cf);

    if (NULL!=hMem)
        {
        ppl=(PPOLYLINEDATA)GlobalLock(hMem);

        //TRUE in wParam to cause PLN_SIZECHANGE notification
        m_pPL->DataSet(ppl, FALSE, TRUE);
        GlobalUnlock(hMem);

        FDirtySet(TRUE);
        fRet=TRUE;
        }

    CloseClipboard();
    return fRet;
    }






/*
 * CCosmoDoc::ColorSet
 *
 * Purpose:
 *  Changes a color used in our contained Polyline.
 *
 * Parameters:
 *  iColor          UINT index of the color to change.
 *  cr              COLORREF new color.
 *
 * Return Value:
 *  COLORREF        Previous color for the given index.
 */

COLORREF CCosmoDoc::ColorSet(UINT iColor, COLORREF cr)
    {
    COLORREF    crRet;

    m_pPL->ColorSet(iColor, cr, &crRet);
    return crRet;
    }





/*
 * CCosmoDoc::ColorGet
 *
 * Purpose:
 *  Retrieves a color currently in use in the Polyline.
 *
 * Parameters:
 *  iColor          UINT index of the color to retrieve.
 *
 * Return Value:
 *  COLORREF        Current color for the given index.
 */

COLORREF CCosmoDoc::ColorGet(UINT iColor)
    {
    COLORREF    crRet;

    m_pPL->ColorGet(iColor, &crRet);
    return crRet;
    }






/*
 * CCosmoDoc::LineStyleSet
 *
 * Purpose:
 *  Changes the line style currently used in the Polyline
 *
 * Parameters:
 *  iStyle          UINT index of the new line style to use.
 *
 * Return Value:
 *  UINT            Previous line style.
 */

UINT CCosmoDoc::LineStyleSet(UINT iStyle)
    {
    UINT    i;

    m_pPL->LineStyleSet(iStyle, &i);
    return i;
    }







/*
 * CCosmoDoc::LineStyleGet
 *
 * Purpose:
 *  Retrieves the line style currently used in the Polyline
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  UINT            Current line style.
 */


UINT CCosmoDoc::LineStyleGet(void)
    {
    UINT    i=0;

    //m_pPL might not be valid yet.
    if (NULL!=m_pPL)
        m_pPL->LineStyleGet(&i);

    return i;
    }







/*
 * CPolylineAdviseSink::CPolylineAdviseSink
 * CPolylineAdviseSink::~CPolylineAdviseSink
 *
 * Constructor Parameters:
 *  pDoc            PCCosmoDoc to store in this object
 */

CPolylineAdviseSink::CPolylineAdviseSink(PCCosmoDoc pDoc)
    {
    m_pDoc=pDoc;
    m_cRef=0;
    AddRef();
    return;
    }


CPolylineAdviseSink::~CPolylineAdviseSink(void)
    {
    return;
    }




/*
 * CPolylineAdviseSink::QueryInterface
 * CPolylineAdviseSink::AddRef
 * CPolylineAdviseSink::Release
 *
 * Purpose:
 *  IUnknown members for this IPolylineAdviseSink implementations.
 */

STDMETHODIMP CPolylineAdviseSink::QueryInterface(REFIID riid
    , PPVOID ppv)
    {
    *ppv=NULL;

    //CHAPTER8MOD
    if (IID_IUnknown==riid || IID_IPolylineAdviseSink8==riid)
        *ppv=this;
    //End CHAPTER8MOD

    if (NULL!=*ppv)
        {
        ((LPUNKNOWN)*ppv)->AddRef();
        return NOERROR;
        }

    return ResultFromScode(S_FALSE);
    }


STDMETHODIMP_(ULONG) CPolylineAdviseSink::AddRef(void)
    {
    return ++m_cRef;
    }


STDMETHODIMP_(ULONG) CPolylineAdviseSink::Release(void)
    {
    if (0L!=--m_cRef)
        return m_cRef;

    delete this;
    return 0;
    }




/*
 * CPolylineAdviseSink::OnPointChange
 *
 * Purpose:
 *  Informs the document that the polyline added or removed a point.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

STDMETHODIMP_(void) CPolylineAdviseSink::OnPointChange(void)
    {
    m_pDoc->FDirtySet(TRUE);
    return;
    }






/*
 * CPolylineAdviseSink::OnSizeChange
 *
 * Purpose:
 *  Informs the document that the polyline changed size.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

STDMETHODIMP_(void) CPolylineAdviseSink::OnSizeChange(void)
    {
    RECT            rc;
    DWORD           dwStyle;
    HWND            hWnd;

    /*
     * Polyline window is informing us that it changed size in
     * response to setting it's data.  Therefore we have to
     * size ourselves accordingly but without moving the screen
     * position of the polyline window.
     */

    m_pDoc->m_fNoSize=TRUE;

    //Set the document window size.
    m_pDoc->m_pPL->Window(&hWnd);
    GetWindowRect(hWnd, &rc);
    InflateRect(&rc, 8, 8);

    //Adjust for a window sans menu
    dwStyle=GetWindowLong(m_pDoc->m_hWnd, GWL_STYLE);
    AdjustWindowRect(&rc, dwStyle, FALSE);

    SetWindowPos(m_pDoc->m_hWnd, NULL, 0, 0, rc.right-rc.left
        , rc.bottom-rc.top, SWP_NOMOVE | SWP_NOZORDER);

    if (NULL!=m_pDoc->m_pAdv)
        m_pDoc->m_pAdv->OnSizeChange(m_pDoc, &rc);

    m_pDoc->m_fNoSize=FALSE;
    m_pDoc->FDirtySet(TRUE);

    return;
    }





/*
 * CPolylineAdviseSink::OnDataChange
 *
 * Purpose:
 *  Informs the document that the polyline data changed.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

STDMETHODIMP_(void) CPolylineAdviseSink::OnDataChange(void)
    {
    if (NULL!=m_pDoc->m_pAdv)
        m_pDoc->m_pAdv->OnDataChange(m_pDoc);

    m_pDoc->FDirtySet(TRUE);
    return;
    }





/*
 * CPolylineAdviseSink::OnColorChange
 *
 * Purpose:
 *  Informs the document that the polyline data changed a color.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

STDMETHODIMP_(void) CPolylineAdviseSink::OnColorChange(void)
    {
    m_pDoc->FDirtySet(TRUE);
    return;
    }





/*
 * CPolylineAdviseSink::OnLineStyleChange
 *
 * Purpose:
 *  Informs the document that the polyline changed its line style.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

STDMETHODIMP_(void) CPolylineAdviseSink::OnLineStyleChange(void)
    {
    m_pDoc->FDirtySet(TRUE);
    return;
    }