PAGE.CPP
资源名称:MSDN_VC98.zip [点击查看]
上传用户:bangxh
上传日期:2007-01-31
资源大小:42235k
文件大小:21k
源码类别:
Windows编程
开发平台:
Visual C++
- /*
- * PAGE.CPP
- * Patron Chapter 13
- *
- * Implementation of parts of the CPage class; those member
- * functions dealing with mouse events are in PAGEMOUS.CPP.
- *
- * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
- *
- * Kraig Brockschmidt, Microsoft
- * Internet : kraigb@microsoft.com
- * Compuserve: >INTERNET:kraigb@microsoft.com
- */
- #include "patron.h"
- /*
- * CPage::CPage
- * CPage::~CPage
- *
- * Constructor Parameters:
- * dwID DWORD identifier for this page.
- * hWnd HWND of the pages window (for repaints, etc).
- * pPG PCPages to the Pages window.
- */
- CPage::CPage(DWORD dwID, HWND hWnd, PCPages pPG)
- {
- m_dwID =dwID;
- m_pIStorage=NULL;
- m_cOpens=0;
- m_hWnd=hWnd;
- m_pPG=pPG;
- m_dwIDNext =0;
- m_cTenants =0;
- m_hWndTenantList=NULL;
- m_iTenantCur =NOVALUE; //Tenants are zero indexed.
- m_pTenantCur =NULL;
- m_uHTCode=HTNOWHERE;
- m_uSizingFlags=0;
- m_fTracking=FALSE;
- m_hDC=NULL;
- //CHAPTER13MOD
- m_fDragPending=FALSE;
- //End CHAPTER13MOD
- m_fSizePending=FALSE;
- m_fTimer=FALSE;
- //CHAPTER13MOD
- //Get WIN.INI distance and delay values, with OLE defaults.
- m_cxyDist=GetProfileInt(TEXT("windows"), TEXT("DragMinDist")
- , DD_DEFDRAGMINDIST);
- m_cDelay=GetProfileInt(TEXT("windows"), TEXT("DragDelay")
- , DD_DEFDRAGDELAY);
- //End CHAPTER13MOD
- return;
- }
- CPage::~CPage(void)
- {
- if (m_fTimer)
- KillTimer(m_hWnd, IDTIMER_DEBOUNCE);
- m_hWnd=NULL;
- Close(FALSE);
- return;
- }
- /*
- * CPage::GetID
- *
- * Return Value:
- * DWORD dwID field in this page.
- */
- DWORD CPage::GetID(void)
- {
- return m_dwID;
- }
- /*
- * CPage::Open
- *
- * Purpose:
- * Retrieves the IStorage associated with this page. The IStorage
- * is owned by the page and thus the page always holds a reference
- * count. The caller should call Close or delete this page to
- * match this open.
- *
- * This function may be called multiple times resulting in
- * additional reference counts on the storage each of which must be
- * matched with a call to Close. The last Close can be done
- * through delete.
- *
- * Parameters:
- * pIStorage LPSTORAGE in which this page lives.
- *
- * Return Value:
- * BOOL TRUE if opening succeeds, FALSE otherwise.
- */
- BOOL CPage::Open(LPSTORAGE pIStorage)
- {
- HRESULT hr=NOERROR;
- LPSTREAM pIStream;
- DWORD dwMode;
- OLECHAR szTemp[32];
- BOOL fNew;
- BOOL fCreated=FALSE;
- TENANTLIST tl;
- PTENANTINFO pti;
- ULONG cb;
- LPMALLOC pIMalloc;
- UINT i;
- PCTenant pTenant;
- fNew=(NULL==m_pIStorage);
- if (!fNew)
- {
- m_cOpens++;
- m_pIStorage->AddRef();
- return TRUE;
- }
- if (NULL==pIStorage)
- return FALSE;
- /*
- * Attempt to open the storage under this ID. If none,
- * create one. In either case, the IStorage is either
- * saved in pPage or released.
- */
- GetStorageName(szTemp);
- dwMode=STGM_TRANSACTED | STGM_READWRITE | STGM_SHARE_EXCLUSIVE;
- hr=pIStorage->OpenStorage(szTemp, NULL, dwMode, NULL, 0
- , &m_pIStorage);
- if (FAILED(hr))
- {
- hr=pIStorage->CreateStorage(szTemp, dwMode, 0, 0
- , &m_pIStorage);
- fCreated=TRUE;
- }
- if (FAILED(hr))
- return FALSE;
- m_cOpens++;
- if (NULL==m_hWndTenantList)
- {
- /*
- * The first time we open this page, create the hidden
- * listbox we'll use to track tenants. We give it the
- * owner-draw style so we can just store pointers in it.
- */
- m_hWndTenantList=CreateWindow(TEXT("listbox")
- , TEXT("Tenant List"), WS_POPUP | LBS_OWNERDRAWFIXED
- , 0, 0, 100, 100, HWND_DESKTOP, NULL
- , m_pPG->m_hInst, NULL);
- if (NULL==m_hWndTenantList)
- return FALSE;
- }
- //If this is brand-new, we're done.
- if (fCreated)
- return TRUE;
- /*
- * Now open the stream we saved in Close and load all the
- * tenants listed in there. If there are none, then we don't
- * have to load squat.
- */
- hr=m_pIStorage->OpenStream(SZSTREAMTENANTLIST, NULL, STGM_DIRECT
- | STGM_READ | STGM_SHARE_EXCLUSIVE, 0, &pIStream);
- if (FAILED(hr))
- return FALSE;
- if (SUCCEEDED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
- {
- pIStream->Read(&tl, sizeof(tl), NULL);
- m_cTenants=tl.cTenants;
- m_dwIDNext=tl.dwIDNext;
- m_iTenantCur=0;
- cb=tl.cTenants*sizeof(TENANTINFO);
- if (0!=cb)
- {
- pti=(PTENANTINFO)pIMalloc->Alloc(cb);
- if (NULL!=pti)
- {
- pIStream->Read(pti, cb, NULL);
- for (i=0; i < m_cTenants; i++)
- {
- if (TenantAdd(NOVALUE, (pti+i)->dwID, &pTenant))
- pTenant->Load(m_pIStorage, (pti+i));
- }
- pIMalloc->Free(pti);
- }
- }
- pIMalloc->Release();
- }
- pIStream->Release();
- //Get and select the first tenant
- if (TenantGet(0, &m_pTenantCur, FALSE))
- m_pTenantCur->Select(TRUE);
- return TRUE;
- }
- /*
- * CPage::Close
- *
- * Purpose:
- * Possibly commits the storage, then releases it reversing the
- * reference count from Open.
- *
- * Parameters:
- * fCommit BOOL indicating if we're to commit.
- *
- * Return Value:
- * None
- */
- void CPage::Close(BOOL fCommit)
- {
- if (NULL==m_pIStorage)
- return;
- if (fCommit)
- Update();
- m_pIStorage->Release();
- //If this was the last close, make all tenants loaded->passive
- if (0==--m_cOpens)
- {
- UINT i;
- PCTenant pTenant;
- m_pIStorage=NULL;
- for (i=0; i < m_cTenants; i++)
- {
- if (TenantGet(i, &pTenant, FALSE))
- {
- if (NULL!=m_hWnd)
- {
- //Open may select again, so this repaints.
- pTenant->Select(FALSE);
- }
- pTenant->Close(FALSE);
- delete pTenant;
- }
- }
- DestroyWindow(m_hWndTenantList);
- m_hWndTenantList=NULL;
- }
- return;
- }
- /*
- * CPage::Update
- *
- * Purpose:
- * Forces a common on the page if it's open.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * BOOL TRUE if there are any open objects on this page,
- * that is, we should remain open.
- */
- BOOL CPage::Update(void)
- {
- BOOL fOpen=FALSE;
- UINT i;
- PCTenant pTenant;
- HRESULT hr;
- LPSTREAM pIStream;
- TENANTLIST tl;
- PTENANTINFO pti;
- ULONG cb;
- LPMALLOC pIMalloc;
- //Walk the list of objects and update them all as well.
- for (i=0; i < m_cTenants; i++)
- {
- if (TenantGet(i, &pTenant, FALSE))
- fOpen |= pTenant->Update();
- }
- //Now write our own stream containing the tenant list.
- hr=m_pIStorage->CreateStream(SZSTREAMTENANTLIST, STGM_CREATE
- | STGM_WRITE| STGM_DIRECT | STGM_SHARE_EXCLUSIVE, 0, 0
- , &pIStream);
- if (FAILED(hr))
- return fOpen;
- if (SUCCEEDED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
- {
- tl.cTenants=m_cTenants;
- tl.dwIDNext=m_dwIDNext;
- pIStream->Write(&tl, sizeof(TENANTLIST), &cb);
- cb=m_cTenants*sizeof(TENANTINFO);
- pti=(PTENANTINFO)pIMalloc->Alloc(cb);
- if (NULL!=pti)
- {
- for (i=0; i < m_cTenants; i++)
- {
- TenantGet(i, &pTenant, FALSE);
- pTenant->GetInfo((pti+i));
- }
- pIStream->Write(pti, cb, &cb);
- pIMalloc->Free(pti);
- }
- pIMalloc->Release();
- }
- pIStream->Release();
- //Now commit the whole mess and we're done
- if (NULL!=m_pIStorage)
- m_pIStorage->Commit(STGC_DEFAULT);
- return fOpen;
- }
- /*
- * CPage::Destroy
- *
- * Purpose:
- * Removes this page from the given storage. The caller should
- * eventually delete this Page object to free the storage.
- *
- * Parameters:
- * pIStorage LPSTORAGE contianing this page on which to call
- * DestroyElement
- *
- * Return Value:
- * None
- */
- void CPage::Destroy(LPSTORAGE pIStorage)
- {
- if (NULL!=pIStorage)
- {
- OLECHAR szTemp[32];
- Close(FALSE);
- GetStorageName(szTemp);
- pIStorage->DestroyElement(szTemp);
- }
- return;
- }
- /*
- * CPage::GetStorageName
- *
- * Parameters:
- * pszName LPOLESTR to a buffer in which to store the
- * storage name for this page.
- *
- * Return Value:
- * UINT Number of characters stored.
- */
- UINT CPage::GetStorageName(LPOLESTR pszName)
- {
- #ifdef WIN32ANSI
- char szTemp[32];
- UINT cch;
- cch=wsprintf(szTemp, "Page %lu", m_dwID);
- MultiByteToWideChar(CP_ACP, 0, szTemp, -1, pszName, 32);
- return cch;
- #else
- return wsprintf(pszName, TEXT("Page %lu"), m_dwID);
- #endif
- }
- /*
- * CPage::Draw
- *
- * Purpose:
- * Draws the objects on this page to the given hDC.
- *
- * Parameters:
- * hDC HDC on which to draw.
- * xOff, yOff int offsets for the page.
- * fNoColor BOOL indicating black & white screen rendering.
- * fPrinter BOOL indicating hDC is on the printer.
- *
- * Return Value:
- * None
- */
- void CPage::Draw(HDC hDC, int xOff, int yOff, BOOL fNoColor
- , BOOL fPrinter)
- {
- int i;
- PCTenant pTenant;
- HDC hIC=NULL;
- PCOMBINEDEVICE pcd=NULL;
- DVTARGETDEVICE *ptd=NULL;
- /*
- * If printing, tell the tenant to forget the borders. Otherwise
- * we leave xOff and yOff the same to account for scrolling.
- */
- if (fPrinter)
- {
- xOff=LOMETRIC_BORDER+m_pPG->m_xMarginLeft;
- yOff=-LOMETRIC_BORDER-m_pPG->m_yMarginTop;
- /*
- * Get device information. If this fails, ptd is
- * NULL which is acceptable.
- */
- if (m_pPG->DevReadConfig(&pcd, &hIC))
- ptd=&(pcd->td);
- }
- for (i=(int)m_cTenants-1; i >=0; i--)
- {
- if (TenantGet(i, &pTenant, FALSE))
- {
- RECT rc, rcWin;
- RECTL rcl;
- //Paint this tenant only if visible.
- pTenant->RectGet(&rcl, TRUE);
- RECTFROMRECTL(rc, rcl);
- OffsetRect(&rc, -(int)m_pPG->m_xPos
- , -(int)m_pPG->m_yPos);
- GetClientRect(m_hWnd, &rcWin);
- if (IntersectRect(&rc, &rc, &rcWin))
- {
- pTenant->Draw(hDC, ptd, hIC, xOff, yOff
- , fNoColor, fPrinter);
- }
- }
- }
- //Free whatever CPages::DevReadConfig returned.
- if (NULL!=pcd)
- {
- LPMALLOC pIMalloc;
- if (SUCCEEDED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
- {
- pIMalloc->Free(pcd);
- pIMalloc->Release();
- }
- }
- if (NULL!=hIC)
- DeleteDC(hIC);
- return;
- }
- /*
- * CPage::TenantCreate
- *
- * Purpose:
- * Creates a new tenant of a specific type.
- *
- * Parameters:
- * tType TENANTTYPE to create.
- * pv LPVOID providing information for the new
- * object creation.
- * pFE LPFORMATETC describing how we want this
- * rendered.
- * ppo PPATRONOBJECT with placement data.
- * dwData DWORD extra data to pass to the tenant.
- *
- * Return Value:
- * None
- */
- BOOL CPage::TenantCreate(TENANTTYPE tType, LPVOID pv
- , LPFORMATETC pFE, PPATRONOBJECT ppo, DWORD dwData)
- {
- PCTenant pTenant;
- UINT uRet;
- int x, y;
- int h, v;
- POINTL ptl;
- SIZEL szl;
- RECTL rcl;
- RECT rc;
- //New tenants go at top of the pile; zero index to TenantAdd.
- if (!TenantAdd(0, m_dwIDNext, &pTenant))
- return FALSE;
- uRet=pTenant->Create(tType, pv, pFE, &ptl, &szl, m_pIStorage
- , ppo, dwData);
- if (CREATE_FAILED==uRet)
- {
- //Reverse Create AND TenantAdd
- SendMessage(m_hWndTenantList, LB_DELETESTRING, 0, 0L);
- pTenant->Destroy(m_pIStorage);
- delete pTenant;
- return FALSE;
- }
- m_dwIDNext++;
- m_cTenants++;
- if (NULL!=m_pTenantCur)
- m_pTenantCur->Select(FALSE);
- m_iTenantCur=0; //First one in the list now.
- m_pTenantCur=pTenant;
- //Tell the tenant where it lives, default is (0,0) in print area
- x=LOMETRIC_BORDER+m_pPG->m_xMarginLeft;
- y=-LOMETRIC_BORDER-m_pPG->m_yMarginTop;
- h=x;
- v=y;
- if (CREATE_PLACEDOBJECT==uRet)
- {
- SetRect(&rc, 3*CXYHANDLE, 3*CXYHANDLE, 0, 0);
- RectConvertMappings(&rc, NULL, FALSE);
- //Make sure place point is on page, otherwise go to (0,0)
- if (((int)ptl.x > x)
- && ((int)ptl.x < x+(int)m_pPG->m_cx-rc.left))
- x=(int)ptl.x;
- //m_pPG->m_cy is absolute
- if (((int)ptl.y < y)
- && ((int)ptl.y > y-(int)m_pPG->m_cy-rc.top))
- y=(int)ptl.y;
- }
- //Bounds check size of the object and fit to page as necessary.
- if (x+(int)szl.cx > (int)(h+m_pPG->m_cx))
- szl.cx=h+m_pPG->m_cx-x;
- //Remember that szl we get from Create is absolute
- if (y-(int)szl.cy < (int)(v-m_pPG->m_cy))
- szl.cy=-(int)(v-m_pPG->m_cy-y);
- SETRECTL(rcl, x, y, x+szl.cx, y-szl.cy);
- m_pTenantCur->RectSet(&rcl, FALSE);
- //Force a repaint on this new guy
- m_pTenantCur->Invalidate();
- UpdateWindow(m_hWnd);
- m_pTenantCur->Select(TRUE);
- return TRUE;
- }
- /*
- * CPage::TenantDestroy
- *
- * Purpose:
- * Destroys the currently selected tenant on this page.
- *
- * Parameters:
- * None
- *
- * Return Value:
- * None
- */
- BOOL CPage::TenantDestroy(void)
- {
- if (NULL==m_pTenantCur)
- {
- MessageBeep(0);
- return FALSE;
- }
- SendMessage(m_hWndTenantList, LB_DELETESTRING
- , m_iTenantCur, 0L);
- m_pTenantCur->Invalidate();
- m_pTenantCur->Destroy(m_pIStorage);
- delete m_pTenantCur;
- m_pTenantCur=NULL;
- //Update counts, etc., and select the next tenant in the list.
- if (m_iTenantCur==m_cTenants-1)
- m_iTenantCur--;
- if (0==--m_cTenants)
- m_pTenantCur=NULL;
- else
- {
- TenantGet(m_iTenantCur, &m_pTenantCur, TRUE);
- m_pTenantCur->Select(TRUE);
- }
- UpdateWindow(m_hWnd);
- return TRUE;
- }
- /*
- * CPage::TenantClip
- *
- * Purpose:
- * Copies or cuts the currently selected tenant to the clipoard.
- *
- * Parameters:
- * fCut BOOL TRUE to cut the object, FALSE to copy.
- *
- * Return Value:
- * BOOL TRUE if successful, FALSE otherwise.
- */
- BOOL CPage::TenantClip(BOOL fCut)
- {
- LPDATAOBJECT pIDataObject;
- BOOL fRet=FALSE;
- if (NULL==m_pTenantCur)
- return FALSE;
- /*
- * To perform a data transfer operation, we need to create a
- * data object with the selected object's data inside. To do
- * this we CoCreateInstance on CLSID_DataTransferObject
- * (Also implemented in this chapter), retrieve data from the
- * object we have, stuff that data into the transfer object,
- * then stick that object on the clipboard.
- *
- * Since we'll want an identical object at other times, like for
- * drag-drop, we use a private function to actually create it.
- */
- pIDataObject=TransferObjectCreate(NULL);
- if (NULL!=pIDataObject)
- {
- if (SUCCEEDED(OleSetClipboard(pIDataObject)))
- {
- if (fCut)
- TenantDestroy();
- fRet=TRUE;
- }
- pIDataObject->Release();
- }
- return fRet;
- }
- /*
- * CPage::FQueryObjectSelected
- *
- * Purpose:
- * Returns whether or not there is an object selected on this
- * page for Cut, Copy, Delete functions.
- *
- * Parameters:
- * hMenu HMENU of the Edit menu.
- *
- * Return Value:
- * BOOL TRUE if we have an object, FALSE otherwise.
- */
- BOOL CPage::FQueryObjectSelected(HMENU hMenu)
- {
- return (NULL!=m_pTenantCur);
- }
- /*
- * CPage::TenantGet
- * (Protected)
- *
- * Purpose:
- * Returns a tenant of a given index returning a BOOL so it's
- * simple to use this function inside if statements.
- *
- * Parameters:
- * iTenant UINT tenant to retrieve 0 based.
- * ppTenant PCPage * in which to return the tenant
- * pointer
- * fOpen BOOL indicating if we should open this
- * tenant as well.
- *
- * Return Value:
- * BOOL TRUE if successful, FALSE otherwise.
- */
- BOOL CPage::TenantGet(UINT iTenant, PCTenant *ppTenant
- , BOOL fOpen)
- {
- if (NULL==ppTenant)
- return FALSE;
- if (LB_ERR!=SendMessage(m_hWndTenantList, LB_GETTEXT
- , iTenant, (LONG)ppTenant))
- {
- if (fOpen)
- (*ppTenant)->Open(m_pIStorage);
- return TRUE;
- }
- return FALSE;
- }
- /*
- * CPage::TenantAdd
- * (Protected)
- *
- * Purpose:
- * Creates a new tenant initialized to the given values. The new
- * tenants's storage is created if it does not already exist. If
- * fOpenStorage is set the the tenants's storage is opened and left
- * opened.
- *
- * Parameters:
- * iTenant UINT Location at which to insert tenant; new
- * tenant is inserted after this position. NOVALUE
- * for the end.
- * dwID DWORD ID for this tenant.
- * ppNew PCTenant * in which to store the new tenant.
- *
- * Return Value:
- * BOOL TRUE if the function succeeded, FALSE otherwise.
- */
- BOOL CPage::TenantAdd(UINT iTenant, DWORD dwID
- , PCTenant *ppNew)
- {
- PCTenant pTenant;
- LRESULT lr;
- if (NULL!=ppNew)
- *ppNew=NULL;
- pTenant=new CTenant(dwID, m_hWnd, m_pPG);
- if (NULL==pTenant)
- return FALSE;
- //Now try to add to the listbox.
- lr=SendMessage(m_hWndTenantList, LB_INSERTSTRING, iTenant
- , (LONG)pTenant);
- if (lr < 0)
- {
- delete pTenant;
- return FALSE;
- }
- *ppNew=pTenant;
- return TRUE;
- }
- /*
- * CPage::TransferObjectCreate
- * (Protected)
- *
- * Purpose:
- * Creates a DataTransferObject and stuff the current selection's
- * data into it.
- *
- * Parameters:
- * pptl PPOINTL containing the pick point in device
- * units applicable only to drag-drop; since
- * drag-drop is inherently mouse oriented, we use
- * device units for the point. Ignored if NULL.
- *
- * Return Value:
- * LPDATAOBJECT Pointer to the object created, NULL on failure
- */
- LPDATAOBJECT CPage::TransferObjectCreate(PPOINTL pptl)
- {
- LPDATAOBJECT pIDataObject;
- LPDATAOBJECT pIDataT;
- PPATRONOBJECT ppo;
- RECTL rcl;
- LPUNKNOWN pObj;
- FORMATETC fe;
- STGMEDIUM stm;
- HRESULT hr;
- m_pTenantCur->ObjectGet(&pObj);
- hr=CoCreateInstance(CLSID_DataTransferObject, NULL
- , CLSCTX_INPROC_SERVER, IID_IDataObject
- , (PPVOID)&pIDataObject);
- if (FAILED(hr))
- return NULL;
- //Go get the data we should hold on to.
- hr=pObj->QueryInterface(IID_IDataObject, (PPVOID)&pIDataT);
- if (FAILED(hr))
- {
- pIDataObject->Release();
- pObj->Release();
- return NULL;
- }
- //Copy from known obj into transfer obj. Ordering is important!
- //Generate placeable object structure
- stm.tymed=TYMED_HGLOBAL;
- stm.pUnkForRelease=NULL;
- stm.hGlobal=GlobalAlloc(GHND, sizeof(PATRONOBJECT));
- if (NULL==stm.hGlobal)
- {
- pIDataObject->Release();
- pObj->Release();
- return NULL;
- }
- ppo=(PPATRONOBJECT)GlobalLock(stm.hGlobal);
- m_pTenantCur->SizeGet(&ppo->szl, FALSE);
- ppo->szl.cy=-ppo->szl.cy; //Negate to make absolute size
- m_pTenantCur->RectGet(&rcl, FALSE);
- ppo->ptl.x=rcl.left;
- ppo->ptl.y=rcl.top;
- if (NULL==pptl)
- {
- ppo->ptlPick.x=0;
- ppo->ptlPick.y=0;
- }
- else
- ppo->ptlPick=*pptl;
- m_pTenantCur->FormatEtcGet(&ppo->fe, FALSE);
- GlobalUnlock(stm.hGlobal);
- SETDefFormatEtc(fe, m_pPG->m_cf, TYMED_HGLOBAL);
- pIDataObject->SetData(&fe, &stm, TRUE);
- //Copy the actual presentation.
- m_pTenantCur->FormatEtcGet(&fe, TRUE);
- pIDataT->GetData(&fe, &stm);
- pIDataObject->SetData(&fe, &stm, TRUE);
- pIDataT->Release();
- pObj->Release();
- return pIDataObject; //Caller now responsible
- }