DOCUMENT.CPP
/*
* DOCUMENT.CPP
* Cosmo Chapter 18
*
* Implementation of the CCosmoDoc derivation of CDocument as
* well as an implementation of CPolylineAdviseSink.
*
* Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Microsoft
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/
#include "cosmo.h"
/*
* CCosmoDoc::CCosmoDoc
* CCosmoDoc::~CCosmoDoc
*
* Constructor Parameters:
* hInst HINSTANCE of the application.
* pFR PCFrame of the frame object.
* pAdv PCDocumentAdviseSink to notify on events
*/
CCosmoDoc::CCosmoDoc(HINSTANCE hInst, PCFrame pFR
, PCDocumentAdviseSink pAdv)
: CDocument(hInst, pFR, pAdv)
{
m_pPL=NULL;
m_pPLAdv=NULL;
m_uPrevSize=SIZE_RESTORED;
m_pDropTarget=NULL;
m_fDragSource=FALSE;
//CHAPTER18MOD
m_cfEmbedSource=RegisterClipboardFormat(CFSTR_EMBEDSOURCE);
m_cfObjectDescriptor=RegisterClipboardFormat
(CFSTR_OBJECTDESCRIPTOR);
m_pFigure=NULL;
//End CHAPTER18MOD
return;
}
CCosmoDoc::~CCosmoDoc(void)
{
//CHAPTER18MOD
//Make sure the object is saved
m_pFigure->SendAdvise(OBJECTCODE_SAVEOBJECT);
m_pFigure->SendAdvise(OBJECTCODE_HIDEWINDOW);
m_pFigure->SendAdvise(OBJECTCODE_CLOSED);
/*
* The AddRef here preserves a reference count on the object
* even after our call to CoDisconnectObject. When we then
* Release that reference count, the figure will start
* shutdown. In some cases shutdown will begin before this
* time in which case we need to clean up before the
* Figure is destroyed, so we delete the figure ourselves.
* This could also be handled with IExternalConnection.
*/
if (NULL!=m_pFigure)
{
m_pFigure->AddRef();
CoDisconnectObject(m_pFigure, 0L);
m_pFigure->Release(); //Starts shutdown if necessary.
delete m_pFigure;
}
//End CHAPTER18MOD
//Clean up the allocations we did in Init
if (NULL!=m_pPL)
delete m_pPL;
if (NULL!=m_pPLAdv)
delete m_pPLAdv;
return;
}
/*
* CCosmoDoc::Init
*
* Purpose:
* Initializes an already created document window. The client
* actually creates the window for us, then passes that here for
* further initialization.
*
* Parameters:
* pDI PDOCUMENTINIT containing initialization
* parameters.
*
* Return Value:
* BOOL TRUE if the function succeeded, FALSE otherwise.
*/
BOOL CCosmoDoc::Init(PDOCUMENTINIT pDI)
{
RECT rc;
//Change the stringtable range to our customization.
pDI->idsMin=IDS_DOCUMENTMIN;
pDI->idsMax=IDS_DOCUMENTMAX;
//Do default initialization
if (!CDocument::Init(pDI))
return FALSE;
//Add the Polyline stuff we need.
m_pPLAdv=new CPolylineAdviseSink(this);
m_pPL =new CPolyline(m_hInst);
//Attempt to create our contained Polyline.
GetClientRect(m_hWnd, &rc);
InflateRect(&rc, -8, -8);
if (!m_pPL->Init(m_hWnd, &rc, WS_CHILD | WS_VISIBLE
, ID_POLYLINE, m_pPLAdv))
return FALSE;
m_pDropTarget=new CDropTarget(this);
if (NULL!=m_pDropTarget)
{
m_pDropTarget->AddRef();
CoLockObjectExternal(m_pDropTarget, TRUE, FALSE);
RegisterDragDrop(m_hWnd, m_pDropTarget);
}
//CHAPTER18MOD
m_pFigure=new CFigure(ObjectDestroyed, this);
if (NULL==m_pFigure)
return FALSE;
//We created an object, so count it.
g_cObj++;
if (!m_pFigure->Init())
return FALSE;
//End CHAPTER18MOD
return TRUE;
}
/*
* CCosmoDoc::FMessageHook
*
* Purpose:
* Processes WM_SIZE for the document so we can resize
* the Polyline.
*
* Parameters:
* <WndProc Parameters>
* pLRes LRESULT * in which to store the return
* value for the message.
*
* Return Value:
* BOOL TRUE to prevent further processing,
* FALSE otherwise.
*/
BOOL CCosmoDoc::FMessageHook(HWND hWnd, UINT iMsg, WPARAM wParam
, LPARAM lParam, LRESULT *pLRes)
{
UINT dx, dy;
RECT rc;
*pLRes=0;
if (WM_SIZE==iMsg)
{
//Don't effect the Polyline size to or from minimized state.
if (SIZE_MINIMIZED!=wParam && SIZE_MINIMIZED !=m_uPrevSize)
{
//When we change size, resize any Polyline we hold.
dx=LOWORD(lParam);
dy=HIWORD(lParam);
/*
* If we are getting WM_SIZE in response to a Polyline
* notification, then don't resize the Polyline window
* again.
*/
if (!m_fNoSize && NULL!=m_pPL)
{
//Resize the polyline to fit the new client
SetRect(&rc, 8, 8, dx-8, dy-8);
m_pPL->RectSet(&rc, FALSE);
/*
* We consider sizing something that makes the file
* dirty, but not until we've finished the create
* process, which is why we set fNoDirty to FALSE
* in WM_CREATE since we get a WM_SIZE on the first
* creation.
*/
if (!m_fNoDirty)
FDirtySet(TRUE);
SetRect(&rc, 0, 0, dx, dy);
if (NULL!=m_pAdv)
m_pAdv->OnSizeChange(this, &rc);
m_fNoDirty=FALSE;
}
}
m_uPrevSize=wParam;
}
if (WM_LBUTTONDOWN==iMsg)
{
LPDROPSOURCE pIDropSource;
LPDATAOBJECT pIDataObject;
HRESULT hr;
SCODE sc;
DWORD dwEffect;
/*
* The document has an 8 pixel border around the polyline
* window where we'll see mouse clicks. A left mouse button
* click here means the start of a drag-drop operation.
*
* Since this is a modal operation, this IDropSource
* is entirely local.
*/
pIDropSource=new CDropSource(this);
if (NULL==pIDropSource)
return FALSE;
pIDropSource->AddRef();
m_fDragSource=TRUE;
//Go get the data and start the ball rolling.
pIDataObject=TransferObjectCreate(FALSE);
if (NULL!=pIDataObject)
{
hr=DoDragDrop(pIDataObject, pIDropSource
, DROPEFFECT_COPY | DROPEFFECT_MOVE, &dwEffect);
pIDataObject->Release();
sc=GetScode(hr);
}
else
sc=E_FAIL;
/*
* When we return from DoDragDrop, either cancel or drop.
* First toss the IDropSource we have here, then bail out
* on cancel, and possibly clear our data on a move drop.
*/
pIDropSource->Release();
/*
* If dropped on the same document (determined using
* this flag, then dwEffect will be DROPEFFECT_NONE (see
* IDropTarget::Drop in DROPTGT.CPP). In any case,
* reset this since the operation is done.
*/
m_fDragSource=FALSE;
if (DRAGDROP_S_DROP==sc && DROPEFFECT_MOVE==dwEffect)
{
m_pPL->New();
FDirtySet(TRUE);
}
//On a canceled drop or a copy we don't do anything else
return TRUE;
}
if (WM_DESTROY==iMsg)
{
/*
* We have to revoke the drop target here because the window
* will be destroyed and the property forcefully removed
* before we could do this in the destructor.
*/
if (NULL!=m_pDropTarget)
{
RevokeDragDrop(m_hWnd);
CoLockObjectExternal(m_pDropTarget, FALSE, TRUE);
ReleaseInterface(m_pDropTarget);
}
return FALSE;
}
/*
* We return FALSE even on WM_SIZE so we can let the default
* procedure handle maximized MDI child windows appropriately.
*/
return FALSE;
}
/*
* CCosmoDoc::Clear
*
* Purpose:
* Sets all contents in the document back to defaults with
* no filename.
*
* Paramters:
* None
*
* Return Value:
* None
*/
void CCosmoDoc::Clear(void)
{
//Completely reset the polyline
m_pPL->New();
CDocument::Clear();
m_lVer=0;
return;
}
//CHAPTER18MOD
/*
* CCosmoDoc::FDirtySet
*
* Purpose:
* Sets or clears the document 'dirty' flag returning the previous
* state of that same flag. We override this in Cosmo server to
* send the OnDataChange notification as necessary.
*
* Parameters:
* fDirty BOOL indicating the new contents of the dirty
* flag.
*
* Return Value:
* BOOL Previous value of the dirty flag.
*/
BOOL CCosmoDoc::FDirtySet(BOOL fDirty)
{
BOOL fRet;
fRet=CDocument::FDirtySet(fDirty);
m_pFigure->SendAdvise(OBJECTCODE_DATACHANGED);
return fRet;
}
/*
* CCosmoDoc::FDirtyGet
*
* Purpose:
* Override of the normal FDirtyGet such that we never return dirty
* for an embedded object we're serving since updates constantly
* happen and since the object will be saved on closure. This then
* prevents any message boxes asking the user to save.
*
* Parameters:
* None
*
* Return Value:
* BOOL TRUE if the document is dirty, FALSE otherwise.
*/
BOOL CCosmoDoc::FDirtyGet(void)
{
if (m_pFigure->FIsEmbedded())
return FALSE;
return m_fDirty;
}
//End CHAPTER18MOD
/*
* CCosmoDoc::Load
*
* Purpose:
* Loads a given document without any user interface overwriting
* the previous contents of the Polyline window. We do this by
* opening the file and telling the Polyline to load itself from
* that file.
*
* Parameters:
* fChangeFile BOOL indicating if we're to update the window
* title and the filename from using this file.
* pszFile LPTSTR to the filename to load, NULL if the file
* is new and untitled.
*
* Return Value:
* UINT An error value from DOCERR_*
*/
UINT CCosmoDoc::Load(BOOL fChangeFile, LPTSTR pszFile)
{
HRESULT hr;
LPSTORAGE pIStorage;
if (NULL==pszFile)
{
//For a new untitled document, just rename ourselves.
Rename(NULL);
m_lVer=VERSIONCURRENT;
return DOCERR_NONE;
}
/*
* If not a Compound File, open the file using STGM_CONVERT in
* transacted mode to see old files as a storage with one stream
* called "CONTENTS" (which is conveniently the name we use
* in the new files). We must use STGM_TRANSACTED here or else
* the old file will be immediately converted on disk: we only
* want a converted image in memory from which to read. In
* addition, note that we need STGM_READWRITE as well since
* conversion is inherently a write operation.
*/
pIStorage=NULL;
if (NOERROR!=StgIsStorageFile(pszFile))
{
hr=StgCreateDocfile(pszFile,STGM_TRANSACTED | STGM_READWRITE
| STGM_CONVERT | STGM_SHARE_EXCLUSIVE, 0, &pIStorage);
if (FAILED(hr))
{
//If denied write access, try to load the old way
if (STG_E_ACCESSDENIED==GetScode(hr))
m_lVer=m_pPL->ReadFromFile(pszFile);
else
return DOCERR_COULDNOTOPEN;
}
}
else
{
hr=StgOpenStorage(pszFile, NULL, STGM_DIRECT | STGM_READ
| STGM_SHARE_EXCLUSIVE, NULL, 0, &pIStorage);
if (FAILED(hr))
return DOCERR_COULDNOTOPEN;
}
if (NULL!=pIStorage)
{
m_lVer=m_pPL->ReadFromStorage(pIStorage);
pIStorage->Release();
}
if (POLYLINE_E_READFAILURE==m_lVer)
return DOCERR_READFAILURE;
if (POLYLINE_E_UNSUPPORTEDVERSION==m_lVer)
return DOCERR_UNSUPPORTEDVERSION;
if (fChangeFile)
Rename(pszFile);
//Importing a file makes things dirty
FDirtySet(!fChangeFile);
return DOCERR_NONE;
}
/*
* CCosmoDoc::Save
*
* Purpose:
* Writes the file to a known filename, requiring that the user has
* previously used FileOpen or FileSaveAs to provide a filename.
*
* Parameters:
* uType UINT indicating the type of file the user
* requested to save in the File Save As dialog.
* pszFile LPTSTR under which to save. If NULL, use the
* current name.
*
* Return Value:
* UINT An error value from DOCERR_*
*/
UINT CCosmoDoc::Save(UINT uType, LPTSTR pszFile)
{
LONG lVer, lRet;
UINT uTemp;
BOOL fRename=TRUE;
HRESULT hr;
LPSTORAGE pIStorage;
//CHAPTER18MOD
BOOL fEmbedding;
fEmbedding=m_pFigure->FIsEmbedded();
//End CHAPTER18MOD
if (NULL==pszFile)
{
fRename=FALSE;
pszFile=m_szFile;
}
/*
* Type 1 is the current version, type 2 is version 1.0 of the
* Polyline so we use this to send the right version to
* CPolyline::WriteToFile/WriteToStorage.
*/
switch (uType)
{
case 0: //From Save, use loaded version.
lVer=m_lVer;
break;
case 1:
lVer=VERSIONCURRENT;
break;
case 2:
lVer=MAKELONG(0, 1); //1.0
break;
default:
return DOCERR_UNSUPPORTEDVERSION;
}
/*
* If the version the user wants to save is different from the
* version that we loaded and m_lVer is not zero (new doc),
* then inform the user of the version change and verify.
*/
//CHAPTER18MOD
//For embedding, this is Save Copy As, so don't ask about versions.
if (0!=m_lVer && m_lVer!=lVer && !fEmbedding)
//End CHAPTER18MOD
{
TCHAR szMsg[128];
wsprintf(szMsg, PSZ(IDS_VERSIONCHANGE)
, (UINT)HIWORD(m_lVer), (UINT)LOWORD(m_lVer)
, (UINT)HIWORD(lVer), (UINT)LOWORD(lVer));
uTemp=MessageBox(m_hWnd, szMsg, PSZ(IDS_DOCUMENTCAPTION)
, MB_YESNOCANCEL);
if (IDCANCEL==uTemp)
return DOCERR_CANCELLED;
//If the user won't upgrade, revert to loaded version.
if (IDNO==uTemp)
lVer=m_lVer;
}
/*
* For 1.0 files, still use the old code. For new files, use
* storages instead
*/
if (lVer==MAKELONG(0, 1))
lRet=m_pPL->WriteToFile(pszFile, lVer);
else
{
hr=StgCreateDocfile(pszFile, STGM_DIRECT | STGM_READWRITE
| STGM_CREATE | STGM_SHARE_EXCLUSIVE, 0, &pIStorage);
if (FAILED(hr))
return DOCERR_COULDNOTOPEN;
//Mark this as one of our class
WriteClassStg(pIStorage, CLSID_CosmoFigure);
//Write user-readable class information
WriteFmtUserTypeStg(pIStorage, m_cf
, PSZ(IDS_CLIPBOARDFORMAT));
lRet=m_pPL->WriteToStorage(pIStorage, lVer);
pIStorage->Release();
}
if (POLYLINE_E_NONE!=lRet)
return DOCERR_WRITEFAILURE;
//CHAPTER18MOD
//Saving makes us clean, but this doesn't apply to embedding.
if (!fEmbedding)
FDirtySet(FALSE);
//End CHAPTER18MOD
//Update the known version of this document.
m_lVer=lVer;
//CHAPTER18MOD
/*
* If we're embedding, this is Save Copy As, so no rename.
* Note that we also don't care about having been set to clean
* since we're always 'clean' as an embedded object from
* the user's perspective.
*/
if (fRename && !fEmbedding)
Rename(pszFile);
//End CHAPTER18MOD
return DOCERR_NONE;
}
/*
* CCosmoDoc::Undo
*
* Purpose:
* Reverses a previous action.
*
* Parameters:
* None
*
* Return Value:
* None
*/
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;
LPDATAOBJECT pIDataObject;
pIDataObject=TransferObjectCreate(fCut);
if (NULL==pIDataObject)
return FALSE;
fRet=SUCCEEDED(OleSetClipboard(pIDataObject));
pIDataObject->Release();
//Delete our current data if "cut" 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(VERSIONCURRENT, &hMem);
return hMem;
}
switch (cf)
{
case CF_METAFILEPICT:
return m_pPL->RenderMetafilePict();
case CF_BITMAP:
return (HGLOBAL)m_pPL->RenderBitmap();
}
return NULL;
}
//CHAPTER18MOD
/*
* CCosmoDoc::RenderMedium
*
* Purpose:
* Like RenderFormat, this function creates a specific data format
* based on the cf parameter. Unlike RenderFormat, we store the
* result in a STGMEDIUM in case it has a medium other than
* TYMED_HGLOBAL. For conveniece we'll centralize all compound
* document formats here, hGlobal or not.
*
* Parameters:
* cf UINT clipboard format of interest.
* pSTM LSTGMEDIUM to fill. We only fill the union
* and tymed.
*
* Return Value:
* BOOL TRUE if we could render the format,
* FALSE otherwise.
*/
BOOL CCosmoDoc::RenderMedium(UINT cf, LPSTGMEDIUM pSTM)
{
if (NULL==pSTM)
return FALSE;
if (cf==m_cfEmbedSource)
{
/*
* Embed Source data is an IStorage containing the native
* data (same as Embedded Object). Since our data is small,
* it makes the most sense to create an IStorage in memory
* and put transfer that instead of a disk-based IStorage.
*/
pSTM->pstg=INOLE_CreateStorageOnHGlobal(STGM_DIRECT
| STGM_READWRITE | STGM_SHARE_EXCLUSIVE);
if (NULL==pSTM->pstg)
return FALSE;
//Now save the data to the storage.
WriteClassStg(pSTM->pstg, CLSID_CosmoFigure);
WriteFmtUserTypeStg(pSTM->pstg, m_cf
, PSZ(IDS_CLIPBOARDFORMAT));
if (POLYLINE_E_NONE!=m_pPL->WriteToStorage(pSTM->pstg
, VERSIONCURRENT))
{
/*
* When someone releases the IStorage, STORAGE.DLL will
* release the ILockBytes which, having fDeleteOnRelease
* TRUE (second parameter) will release the memory.
* That's why we don't have STGM_DELETEONRELEASE on the
* IStorage.
*/
pSTM->pstg->Release();
return FALSE;
}
pSTM->tymed=TYMED_ISTORAGE;
return TRUE;
}
if (cf==m_cfObjectDescriptor)
{
SIZEL szl, szlT;
POINTL ptl;
RECT rc;
m_pPL->SizeGet(&rc);
SETSIZEL(szlT, rc.right, rc.bottom);
XformSizeInPixelsToHimetric(NULL, &szlT, &szl);
SETPOINTL(ptl, 0, 0);
pSTM->hGlobal=INOLE_AllocObjectDescriptor
(CLSID_CosmoFigure, DVASPECT_CONTENT, szl, ptl
, OLEMISC_RECOMPOSEONRESIZE, PSZ(IDS_OBJECTDESCRIPTION)
, NULL);
pSTM->tymed=TYMED_HGLOBAL;
return (NULL!=pSTM->hGlobal);
}
return FALSE;
}
//End CHAPTER18MOD
/*
* 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)
{
LPDATAOBJECT pIDataObject;
BOOL fRet;
if (FAILED(OleGetClipboard(&pIDataObject)))
return FALSE;
fRet=FQueryPasteFromData(pIDataObject);
pIDataObject->Release();
return fRet;
}
/*
* CCosmoDoc::FQueryPasteFromData
* (Protected)
*
* Purpose:
* Determines if we can paste data from a data object.
*
* Parameters:
* pIDataObject LPDATAOBJECT from which we might want to paste.
*
* Return Value:
* BOOL TRUE if data is available, FALSE otherwise.
*/
BOOL CCosmoDoc::FQueryPasteFromData(LPDATAOBJECT pIDataObject)
{
FORMATETC fe;
SETDefFormatEtc(fe, m_cf, TYMED_HGLOBAL);
return (NOERROR==pIDataObject->QueryGetData(&fe));
}
/*
* 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)
{
LPDATAOBJECT pIDataObject;
BOOL fRet;
if (FAILED(OleGetClipboard(&pIDataObject)))
return FALSE;
fRet=PasteFromData(pIDataObject);
pIDataObject->Release();
return fRet;
}
/*
* CCosmoDoc::PasteFromData
* (Protected)
*
* Purpose:
* Retrieves the private data format from a data object and sets
* it to the current figure in the editor window.
*
* Parameters:
* pIDataObject LPDATAOBJECT from which to paste.
*
* Return Value:
* BOOL TRUE if successful, FALSE otherwise.
*/
BOOL CCosmoDoc::PasteFromData(LPDATAOBJECT pIDataObject)
{
FORMATETC fe;
STGMEDIUM stm;
BOOL fRet;
SETDefFormatEtc(fe, m_cf, TYMED_HGLOBAL);
fRet=SUCCEEDED(pIDataObject->GetData(&fe, &stm));
if (fRet && NULL!=stm.hGlobal)
{
m_pPL->DataSetMem(stm.hGlobal, FALSE, FALSE, TRUE);
ReleaseStgMedium(&stm);
FDirtySet(TRUE);
}
return fRet;
}
/*
* CCosmoDoc::TransferObjectCreate
* (Protected)
*
* Purpose:
* Creates a DataTransferObject and stuffs the current Polyline
* data into it, used for both clipboard and drag-drop operations.
*
* Parameters:
* fCut BOOL TRUE if we're cutting, FALSE if we're
* copying.
*
* Return Value:
* LPDATAOBJECT Pointer to the object created, NULL on failure
*/
LPDATAOBJECT CCosmoDoc::TransferObjectCreate(BOOL fCut)
{
UINT i;
HRESULT hr;
STGMEDIUM stm;
FORMATETC fe;
LPDATAOBJECT pIDataObject=NULL;
//CHAPTER18MOD
const UINT cFormats=5;
static UINT rgcf[5]={0, 0, 0, CF_METAFILEPICT, CF_BITMAP};
static DWORD rgtm[5]={TYMED_HGLOBAL, TYMED_ISTORAGE
, TYMED_HGLOBAL, TYMED_MFPICT, TYMED_GDI};
//CHAPTER18MOD
hr=CoCreateInstance(CLSID_DataTransferObject, NULL
, CLSCTX_INPROC_SERVER, IID_IDataObject
, (PPVOID)&pIDataObject);
if (FAILED(hr))
return NULL;
rgcf[0]=m_cf;
//CHAPTER18MOD
rgcf[1]=m_cfEmbedSource;
rgcf[2]=m_cfObjectDescriptor;
//End CHAPTER18MOD
for (i=0; i < cFormats; i++)
{
//CHAPTER18MOD
/*
* RenderFormat handles memory handles, but for compound doc
* formats we need something more. So if RenderFormat fails
* (which it will for i=1, try our latest addition which
* writes to a different field in the STGMEDIUM.
*/
stm.hGlobal=RenderFormat(rgcf[i]);
if (NULL==stm.hGlobal)
{
if (!RenderMedium(rgcf[i], &stm))
continue;
}
stm.tymed=rgtm[i];
stm.pUnkForRelease=NULL;
SETDefFormatEtc(fe, rgcf[i], rgtm[i]);
pIDataObject->SetData(&fe, &stm, TRUE);
//End CHAPTER18MOD
}
return pIDataObject; //Caller now responsible
}
/*
* CCosmoDoc::DropSelectTargetWindow
* (Protected)
*
* Purpose:
* Creates a thin inverted frame around a window that we use to
* show the window as a drop target. This is a toggle function:
* It uses XOR to create the effect so it must be called twice to
* leave the window as it was.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CCosmoDoc::DropSelectTargetWindow(void)
{
HDC hDC;
RECT rc;
UINT dd=3;
HWND hWnd;
hWnd=m_pPL->Window();
hDC=GetWindowDC(hWnd);
GetClientRect(hWnd, &rc);
//Frame this window with inverted pixels
//Top
PatBlt(hDC, rc.left, rc.top, rc.right-rc.left, dd, DSTINVERT);
//Bottom
PatBlt(hDC, rc.left, rc.bottom-dd, rc.right-rc.left, dd
, DSTINVERT);
//Left excluding regions already affected by top and bottom
PatBlt(hDC, rc.left, rc.top+dd, dd, rc.bottom-rc.top-(2*dd)
, DSTINVERT);
//Right excluding regions already affected by top and bottom
PatBlt(hDC, rc.right-dd, rc.top+dd, dd, rc.bottom-rc.top-(2*dd)
, DSTINVERT);
ReleaseDC(hWnd, hDC);
return;
}
/*
* 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)
{
return m_pPL->ColorSet(iColor, cr);
}
/*
* 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)
{
return m_pPL->ColorGet(iColor);
}
/*
* 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)
{
return m_pPL->LineStyleSet(iStyle);
}
/*
* CCosmoDoc::LineStyleGet
*
* Purpose:
* Retrieves the line style currently used in the Polyline
*
* Parameters:
* None
*
* Return Value:
* UINT Current line style.
*/
UINT CCosmoDoc::LineStyleGet(void)
{
if (NULL==m_pPL) //m_pPL might not be valid yet
return 0L;
return m_pPL->LineStyleGet();
}
/*
* CPolylineAdviseSink::CPolylineAdviseSink
* CPolylineAdviseSink::~CPolylineAdviseSink
*
* Constructor Parameters:
* pv LPVOID to store in this object
*/
CPolylineAdviseSink::CPolylineAdviseSink(LPVOID pv)
{
m_pv=pv;
return;
}
CPolylineAdviseSink::~CPolylineAdviseSink(void)
{
return;
}
/*
* CPolylineAdviseSink::OnPointChange
*
* Purpose:
* Informs the document that the polyline added or removed a point.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CPolylineAdviseSink::OnPointChange(void)
{
PCDocument pDoc=(PCDocument)m_pv;
pDoc->FDirtySet(TRUE);
return;
}
/*
* CPolylineAdviseSink::OnSizeChange
*
* Purpose:
* Informs the document that the polyline changed size.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CPolylineAdviseSink::OnSizeChange(void)
{
PCCosmoDoc pDoc=(PCCosmoDoc)m_pv;
RECT rc;
DWORD dwStyle;
/*
* 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.
*/
pDoc->m_fNoSize=TRUE;
//Set the document window size.
GetWindowRect(pDoc->m_pPL->Window(), &rc);
InflateRect(&rc, 8, 8);
//Adjust for a window sans menu
dwStyle=GetWindowLong(pDoc->m_hWnd, GWL_STYLE);
AdjustWindowRect(&rc, dwStyle, FALSE);
SetWindowPos(pDoc->m_hWnd, NULL, 0, 0, rc.right-rc.left
, rc.bottom-rc.top, SWP_NOMOVE | SWP_NOZORDER);
if (NULL!=pDoc->m_pAdv)
pDoc->m_pAdv->OnSizeChange(pDoc, &rc);
pDoc->m_fNoSize=FALSE;
pDoc->FDirtySet(TRUE);
return;
}
/*
* CPolylineAdviseSink::OnDataChange
*
* Purpose:
* Informs the document that the polyline data changed.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CPolylineAdviseSink::OnDataChange(void)
{
PCCosmoDoc pDoc=(PCCosmoDoc)m_pv;
if (NULL!=pDoc->m_pAdv)
pDoc->m_pAdv->OnDataChange(pDoc);
pDoc->FDirtySet(TRUE);
return;
}
/*
* CPolylineAdviseSink::OnColorChange
*
* Purpose:
* Informs the document that the polyline data changed a color.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CPolylineAdviseSink::OnColorChange(void)
{
PCCosmoDoc pDoc=(PCCosmoDoc)m_pv;
pDoc->FDirtySet(TRUE);
return;
}
/*
* CPolylineAdviseSink::OnLineStyleChange
*
* Purpose:
* Informs the document that the polyline changed its line style.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CPolylineAdviseSink::OnLineStyleChange(void)
{
PCCosmoDoc pDoc=(PCCosmoDoc)m_pv;
pDoc->FDirtySet(TRUE);
return;
}