pages.cpp

英文版的 想要的话可以下载了 为大家服务

/*
 * PAGES.CPP
 * Patron Chapter 24
 *
 * Implementation of the CPages class.  See PAGEWIN.CPP and PRINT.CPP
 * for additional member functions.
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  [e-mail]
 * Compuserve:  >INTERNET:[e-mail]
 */


#include "patron.h"


/*
 * CPages:CPages
 * CPages::~CPages
 *
 * Constructor Parameters:
 *  hInst           HINSTANCE of the application we're in.
 *  cf              UINT application clipboard format.
 */

CPages::CPages(HINSTANCE hInst, UINT cf)
    : CWindow(hInst)
    {
    m_pPageCur=NULL;
    m_iPageCur=NOVALUE;  //Pages are 0 indexed, this is one before
    m_cPages=0;
    m_hWndPageList=NULL;
    m_hFont=NULL;
    m_fSystemFont=FALSE;

    //Initialize to 8.5*11 inch with .25 inch margins as a default.
    m_cx=(LOMETRIC_PER_INCH*17)/2;
    m_cy=LOMETRIC_PER_INCH*11;

    m_xMarginLeft=LOMETRIC_PER_INCH/4;
    m_xMarginRight=LOMETRIC_PER_INCH/4;
    m_yMarginTop=LOMETRIC_PER_INCH/4;
    m_yMarginBottom=LOMETRIC_PER_INCH/4;

    m_xPos=0L;
    m_yPos=0L;

    m_dwIDNext=0;
    m_pIStorage=NULL;

    m_fDirty=FALSE;
    m_cf=cf;

    m_fDragSource=FALSE;
    m_fMoveInPage=FALSE;
    m_fLinkAllowed=FALSE;

    m_fDragRectShown=FALSE;

    m_uScrollInset=GetProfileInt(TEXT("windows")
        , TEXT("DragScrollInset"), DD_DEFSCROLLINSET);

    m_uScrollDelay=GetProfileInt(TEXT("windows")
        , TEXT("DragScrollDelay"), DD_DEFSCROLLDELAY);

    m_uHScrollCode=0;
    m_uVScrollCode=0;
    m_fShowTypes=FALSE;
    m_pmkFile=NULL;

    m_fAddUI=FALSE;
    //CHAPTER24MOD
    m_fDesignMode=FALSE;
    m_fUIDead=FALSE;
    m_fHatchHandles=TRUE;
    m_pIFont=NULL;
    //End CHAPTER24MOD
    return;
    }


CPages::~CPages(void)
    {
    //Ensure memory cleaned up in list; do final IStorage::Release
    StorageSet(NULL, FALSE, FALSE);

    ReleaseInterface(m_pmkFile);

    //CHAPTER24MOD
    ReleaseInterface(m_pIFont);
    //End CHAPTER24MOD

    if (NULL!=m_hFont && !m_fSystemFont)
        DeleteObject(m_hFont);

    if (NULL!=m_hWndPageList)
        DestroyWindow(m_hWndPageList);

    //m_hWnd destroyed with the document.
    return;
    }



/*
 * CPages::FIsDirty
 *
 * Purpose:
 *  Tells the caller (document) if anything's happened to dirty us.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

BOOL CPages::FIsDirty(void)
    {
    return m_fDirty;
    }



/*
 * CPages::Init
 *
 * Purpose:
 *  Instantiates a pages window within a given parent.  The
 *  parent may be a main application window, could be an MDI child
 *  window. We really do not care.
 *
 * Parameters:
 *  hWndParent      HWND of the parent of this window
 *  pRect           LPRECT that this window should occupy
 *  dwStyle         DWORD containing the window's style flags.
 *                  Should contain WS_CHILD | WS_VISIBLE in
 *                  typical circumstances.
 *  uID             UINT ID to associate with this window
 *  pv              LPVOID unused for now.
 *
 * Return Value:
 *  BOOL            TRUE if the function succeeded, FALSE otherwise.
 */

BOOL CPages::Init(HWND hWndParent, LPRECT pRect, DWORD dwStyle
    , UINT uID, LPVOID pv)
    {
    int         cy;
    //CHAPTER24MOD
    FONTDESC    fd={sizeof(FONTDESC), OLETEXT("Arial")
                    , FONTSIZE(14), FW_NORMAL, DEFAULT_CHARSET
                    , FALSE, FALSE, FALSE};
    //End CHAPTER24MOD

    m_hWnd=CreateWindowEx(WS_EX_NOPARENTNOTIFY, SZCLASSPAGES
        , SZCLASSPAGES, dwStyle, pRect->left, pRect->top
        , pRect->right-pRect->left, pRect->bottom-pRect->top
        , hWndParent, (HMENU)uID, m_hInst, this);

    if (NULL==m_hWnd)
        return FALSE;

    /*
     * Create the hidden listbox we'll use to track pages.  We give
     * it the owner-draw style so we can just store pointers in it.
     */
    m_hWndPageList=CreateWindow(TEXT("listbox"), TEXT("Page List")
        , WS_POPUP | LBS_OWNERDRAWFIXED, 0, 0, 100, 100
        , HWND_DESKTOP, NULL, m_hInst, NULL);

    if (NULL==m_hWndPageList)
        return FALSE;

    cy=MulDiv(-14, LOMETRIC_PER_INCH, 72);
    m_hFont=CreateFont(cy, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE
        , ANSI_CHARSET, OUT_TT_PRECIS, CLIP_TT_ALWAYS, PROOF_QUALITY
        , VARIABLE_PITCH | FF_SWISS, TEXT("Arial"));

    if (NULL==m_hFont)
        {
        m_hFont=(HFONT)GetStockObject(ANSI_VAR_FONT);
        m_fSystemFont=TRUE;
        }

    //CHAPTER24MOD
    //Need a standard font object for ambient properties
    OleCreateFontIndirect(&fd, IID_IFontDisp, (void **)&m_pIFont);
    //End CHAPTER24MOD

    return TRUE;
    }






/*
 * CPages::StorageSet
 *
 * Purpose:
 *  Provides the document's IStorage to the pages for its own use.
 *  If this is a new storage, we initalize it with streams that we
 *  want to always exists.  If this is an open, then we create
 *  our page list from the PageList string we wrote before.
 *
 * Parameters:
 *  pIStorage       LPSTORAGE to the new or opened storage.  If
 *                  NULL, we just clean up and exit.
 *  fChange         BOOL indicating is this was a Save As operation,
 *                  meaning that we have the structure already and
 *                  just need to change the value of m_pIStorage.
 *  fInitNew        BOOL indicating if this is a new storage or one
 *                  opened from a previous save.
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CPages::StorageSet(LPSTORAGE pIStorage, BOOL fChange
    , BOOL fInitNew)
    {
    DWORD           dwMode=STGM_DIRECT | STGM_READWRITE
                        | STGM_SHARE_EXCLUSIVE;
    HRESULT         hr;
    PCPage          pPage;
    BOOL            fRet=FALSE;
    ULONG           cbRead;
    PAGELIST        pgList;
    LPSTREAM        pIStream;
    LPMALLOC        pIMalloc;
    LPDWORD         pdwID;
    UINT            i;

    //If we're changing saved roots, simply open current page again
    if (fChange)
        {
        if (NULL==pIStorage)
            return FALSE;

        m_pIStorage->Release();
        m_pIStorage=pIStorage;
        m_pIStorage->AddRef();

        PageGet(m_iPageCur, &m_pPageCur, TRUE);
        m_fDirty=FALSE;
        return TRUE;
        }

    if (NULL!=m_hWndPageList)
        {
        //On new or open, clean out whatever it is we have.
        for (i=0; i < m_cPages; i++)
            {
            if (PageGet(i, &pPage, FALSE))
                pPage->Release();
            }

        SendMessage(m_hWndPageList, LB_RESETCONTENT, 0, 0L);
        }

    if (NULL!=m_pIStorage)
        m_pIStorage->Release();

    m_pIStorage=NULL;

    //If we're just cleaning up, then we're done.
    if (NULL==pIStorage)
        return TRUE;

    m_pIStorage=pIStorage;
    m_pIStorage->AddRef();

    //If this is a new storage, create the streams we require
    if (fInitNew)
        {
        //Page list header.
        hr=m_pIStorage->CreateStream(SZSTREAMPAGELIST, dwMode
            | STGM_CREATE, 0, 0, &pIStream);

        if (FAILED(hr))
            return FALSE;

        pIStream->Release();

        //Device Configuration
        hr=m_pIStorage->CreateStream(SZSTREAMDEVICECONFIG, dwMode
            | STGM_CREATE, 0, 0, &pIStream);

        if (FAILED(hr))
            return FALSE;

        pIStream->Release();
        return TRUE;
        }


    /*
     * We're opening an existing file:
     *  1)  Configure for the device we're on
     *  2)  Read the Page List and create page entries for each.
     */

    ConfigureForDevice();

    //Read the page list.
    hr=m_pIStorage->OpenStream(SZSTREAMPAGELIST, NULL, dwMode, 0
        , &pIStream);

    if (FAILED(hr))
        return FALSE;

    if (SUCCEEDED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
        {
        pIStream->Read(&pgList, sizeof(PAGELIST), &cbRead);
        m_cPages  =(UINT)pgList.cPages;
        m_iPageCur=(UINT)pgList.iPageCur;
        m_dwIDNext=pgList.dwIDNext;

        fRet=TRUE;
        cbRead=pgList.cPages*sizeof(DWORD);

        if (0!=cbRead)
            {
            pdwID=(LPDWORD)pIMalloc->Alloc(cbRead);

            if (NULL!=pdwID)
                {
                pIStream->Read(pdwID, cbRead, &cbRead);

                for (i=0; i < m_cPages; i++)
                    fRet &=PageAdd(NOVALUE, *(pdwID+i), FALSE);

                pIMalloc->Free(pdwID);
                }
            }

        pIMalloc->Release();
        }

    pIStream->Release();

    if (!fRet)
        return FALSE;

    PageGet(m_iPageCur, &m_pPageCur, TRUE);
    m_fDirty=FALSE;

    InvalidateRect(m_hWnd, NULL, FALSE);
    UpdateWindow(m_hWnd);

    return TRUE;
    }





/*
 * CPages::StorageUpdate
 *
 * Purpose:
 *  Insures that all pages are committed before a root save.
 *
 * Parameters:
 *  fCloseAll       BOOL directing us to close all open storages
 *                  and streams.
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CPages::StorageUpdate(BOOL fCloseAll)
    {
    PCPage          pPage;
    LPSTREAM        pIStream;
    LPMALLOC        pIMalloc;
    LPDWORD         pdwID;
    ULONG           cb;
    HRESULT         hr;
    PAGELIST        pgList;
    BOOL            fRet=FALSE;
    UINT            i;

    //We only need to close the current page--nothing else is open.
    if (NULL!=m_pPageCur)
        {
        m_pPageCur->Update();

        if (fCloseAll)
            m_pPageCur->Close(FALSE);
        }

    //We don't hold anything else open, so write the page list.
    hr=m_pIStorage->OpenStream(SZSTREAMPAGELIST, NULL, STGM_DIRECT
        | STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 0, &pIStream);

    if (FAILED(hr))
        return FALSE;

    if (SUCCEEDED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
        {
        pgList.cPages=m_cPages;
        pgList.iPageCur=m_iPageCur;
        pgList.dwIDNext=m_dwIDNext;

        pIStream->Write(&pgList, sizeof(PAGELIST), &cb);

        cb=m_cPages*sizeof(DWORD);
        pdwID=(LPDWORD)pIMalloc->Alloc(cb);

        if (NULL!=pdwID)
            {
            for (i=0; i < m_cPages; i++)
                {
                PageGet(i, &pPage, FALSE);
                *(pdwID+i)=pPage->GetID();
                }

            pIStream->Write(pdwID, cb, &cb);
            pIMalloc->Free(pdwID);
            fRet=TRUE;
            }
        pIMalloc->Release();
        }

    pIStream->Release();

    //Clean up the dirty flag when we do an update.
    m_fDirty=!fRet;
    return fRet;
    }







/*
 * CPages::RectGet
 *
 * Purpose:
 *  Returns the rectangle of the Pages window in parent coordinates.
 *
 * Parameters:
 *  pRect           LPRECT in which to return the rectangle.
 *
 * Return Value:
 *  None
 */

void CPages::RectGet(LPRECT pRect)
    {
    RECT        rc;
    POINT       pt;

    //Retrieve the size of our rectangle in parent coordinates.
    GetWindowRect(m_hWnd, &rc);
    SETPOINT(pt, rc.left, rc.top);
    ScreenToClient(GetParent(m_hWnd), &pt);

    SetRect(pRect, pt.x, pt.y, pt.x+(rc.right-rc.left)
        , pt.y+(rc.bottom-rc.top));

    return;
    }






/*
 * CPages::RectSet
 *
 * Purpose:
 *  Sets a new rectangle for the Pages window which sizes to fit.
 *  Coordinates are given in parent terms.
 *
 * Parameters:
 *  pRect           LPRECT containing the new rectangle.
 *  fNotify         BOOL indicating if we're to notify anyone of
 *                  the change.
 *
 * Return Value:
 *  None
 */

void CPages::RectSet(LPRECT pRect, BOOL fNotify)
    {
    UINT        cx, cy;

    if (NULL==pRect)
        return;

    cx=pRect->right-pRect->left;
    cy=pRect->bottom-pRect->top;

    SetWindowPos(m_hWnd, NULL, pRect->left, pRect->top
        , (UINT)cx, (UINT)cy, SWP_NOZORDER);

    UpdateScrollRanges();
    return;
    }




/*
 * CPages::SizeGet
 *
 * Purpose:
 *  Retrieves the size of the pages window in parent coordinates.
 *
 * Parameters:
 *  pRect           LPRECT in which to return the size.  The right
 *                  and bottom fields will contain the dimensions.
 *
 * Return Value:
 *  None
 */

void CPages::SizeGet(LPRECT pRect)
    {
    RectGet(pRect);
    return;
    }







/*
 * CPages::SizeSet
 *
 * Purpose:
 *  Sets a new size in parent coordinates for the Pages window.
 *
 * Parameters:
 *  pRect           LPRECT containing the new rectangle.
 *  fNotify         BOOL indicating if we're to notify anyone of
 *                  the change.
 *
 * Return Value:
 *  None
 */

void CPages::SizeSet(LPRECT pRect, BOOL fNotify)
    {
    UINT        cx, cy;

    if (NULL==pRect)
        return;

    cx=pRect->right-pRect->left;
    cy=pRect->bottom-pRect->top;

    SetWindowPos(m_hWnd, NULL, 0, 0, (UINT)cx, (UINT)cy
        , SWP_NOMOVE | SWP_NOZORDER);

    UpdateScrollRanges();
    return;
    }






/*
 * CPages::ActivePage
 *
 * Purpose:
 *  Returns a CPage pointer to the current page.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  PCPage          Pointer to the current page.
 */

PCPage CPages::ActivePage(void)
    {
    PCPage      pPage;
    BOOL        fRet;

    fRet=PageGet(m_iPageCur, &pPage, FALSE);
    return fRet ? pPage : NULL;
    }





/*
 * CPages::PageInsert
 *
 * Purpose:
 *  Creates a new page immediately after the current page.  If
 *  there are no pages then this creates page 1.
 *
 * Parameters:
 *  uReserved       UINT unused
 *
 * Return Value:
 *  UINT            Index of the new page, 0 on failure.
 */

UINT CPages::PageInsert(UINT uReserved)
    {
    if (0!=m_cPages && NULL!=m_pPageCur)
        {
        //Close the current page, committing changes.
        m_pPageCur->Close(TRUE);
        }

    //Create and open the new page.
    if (!PageAdd(m_iPageCur, m_dwIDNext, TRUE))
        return 0;

    m_dwIDNext++;
    m_iPageCur++;
    m_cPages++;

    InvalidateRect(m_hWnd, NULL, FALSE);
    UpdateWindow(m_hWnd);

    PageGet(m_iPageCur, &m_pPageCur, FALSE);
    return m_iPageCur;
    }







/*
 * CPages::PageDelete
 *
 * Removes the current page from the page list.
 *
 * Parameters:
 *  uReserved       UINT unused
 *
 * Return Value:
 *  UINT            Index to the now current page from the page
 *                  list, NOVALUE on error.
 */

UINT CPages::PageDelete(UINT uReserved)
    {
    PCPage      pPage;

    if (!PageGet(m_iPageCur, &pPage, FALSE))
        return NOVALUE;

    //Delete the page in both the storage and in memory.
    SendMessage(m_hWndPageList, LB_DELETESTRING, m_iPageCur, 0L);

    m_pPageCur->Destroy(m_pIStorage);

    m_pPageCur->Release();   //Does final pPage->Close
    m_pPageCur=NULL;

    /*
     * If this is the last page then the current is one less.  If
     * it's the only page the current is zero.  Otherwise the
     * current is the next page.
     */

    if (m_iPageCur==m_cPages-1)   //Covers last or only page.
        m_iPageCur--;

    m_cPages--;