DOCUMENT.CPP
/*
* DOCUMENT.CPP
* Component Cosmo Chapter 8
*
* Implementation of the CCosmoDoc derivation of CDocument as
* well as an implementation of CPolylineAdviseSink.
*
* Copyright (c)1993-1997 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Software Design Engineer
* Microsoft Systems Developer Relations
*
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/
#include "cocosmo.h"
/*
* CCosmoDoc::CCosmoDoc
* CCosmoDoc::~CCosmoDoc
*
* Constructor Parameters:
* hInst HINSTANCE of the application.
* pFR PCFrame of the frame object.
*/
CCosmoDoc::CCosmoDoc(HINSTANCE hInst, PCFrame pFR)
: CDocument(hInst, pFR)
{
m_uPrevSize=SIZE_RESTORED;
m_pPL=NULL;
m_pPLAdv=NULL;
m_pIStorage=NULL;
m_pIPersistStorage=NULL;
m_pIAdviseSink=NULL;
m_dwConn=0;
m_pIDataClip=NULL;
//CHAPTER8MOD
m_pDropTarget=NULL;
m_fDragSource=FALSE;
//End CHAPTER8MOD
return;
}
CCosmoDoc::~CCosmoDoc(void)
{
LPDATAOBJECT pIDataObject;
HRESULT hr;
if (NULL!=m_pIDataClip)
m_pIDataClip->Release();
//Turn off the advise.
if (NULL!=m_pPL && 0!=m_dwConn)
{
hr=m_pPL->QueryInterface(IID_IDataObject
, (PPVOID)&pIDataObject);
if (SUCCEEDED(hr))
{
pIDataObject->DUnadvise(m_dwConn);
pIDataObject->Release();
}
}
if (NULL!=m_pIAdviseSink)
delete m_pIAdviseSink;
if (NULL!=m_pIPersistStorage)
m_pIPersistStorage->Release();
if (NULL!=m_pIStorage)
m_pIStorage->Release();
if (NULL!=m_pPL)
m_pPL->Release();
if (NULL!=m_pPLAdv)
delete m_pPLAdv;
CoFreeUnusedLibraries();
return;
}
/*
* CCosmoDoc::FInit
*
* 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::FInit(PDOCUMENTINIT pDI)
{
RECT rc;
HRESULT hr;
FORMATETC fe;
LPDATAOBJECT pIDataObject;
//Change the stringtable range to our customization.
pDI->idsMin=IDS_DOCUMENTMIN;
pDI->idsMax=IDS_DOCUMENTMAX;
//Do default initialization
if (!CDocument::FInit(pDI))
return FALSE;
//Create the Polyline Component Object via COMPOBJ.DLL functions
hr=CoCreateInstance(CLSID_Polyline6, NULL, CLSCTX_INPROC_SERVER
, IID_IPolyline6, (PPVOID)&m_pPL);
if (FAILED(hr))
{
//Warn that we could not load the Polyline
MessageBox(pDI->hWndDoc, PSZ(IDS_NOPOLYLINE)
, PSZ(IDS_CAPTION), MB_OK);
return FALSE;
}
//Initialize the contained Polyline which creates a window.
GetClientRect(m_hWnd, &rc);
InflateRect(&rc, -8, -8);
if (FAILED(m_pPL->Init(m_hWnd, &rc, WS_CHILD | WS_VISIBLE
, ID_POLYLINE)))
return FALSE;
//Set up an advise on the Polyline.
m_pPLAdv=new CPolylineAdviseSink(this, this);
if (NULL==m_pPLAdv)
return FALSE;
m_pPL->SetAdvise(m_pPLAdv);
//Get the IPersistStorage interface on the object for loads & saves.
hr=m_pPL->QueryInterface(IID_IPersistStorage
, (PPVOID)&m_pIPersistStorage);
if (FAILED(hr))
return FALSE;
/*
* Create an IAdviseSink and send it to the Polyline's
* IDataObject with the clipboard format for the Polyline
* (as in IPOLY6.H).
*/
//This is a private macro.
SETDefFormatEtc(fe, m_cf, TYMED_HGLOBAL);
m_pIAdviseSink=new CImpIAdviseSink(this, this);
if (NULL==m_pIAdviseSink)
return FALSE;
//Set up an advise for the Polyline format
hr=m_pPL->QueryInterface(IID_IDataObject
, (PPVOID)&pIDataObject);
if (FAILED(hr))
return FALSE;
pIDataObject->DAdvise(&fe, ADVF_NODATA, m_pIAdviseSink
, &m_dwConn);
pIDataObject->Release();
//CHAPTER8MOD
m_pDropTarget=new CDropTarget(this);
if (NULL!=m_pDropTarget)
{
m_pDropTarget->AddRef();
CoLockObjectExternal(m_pDropTarget, TRUE, FALSE);
RegisterDragDrop(m_hWnd, m_pDropTarget);
}
//End CHAPTER8MOD
return TRUE;
}
//IUnknown interface for all others we implement in the document
/*
* CCosmoDoc::QueryInterface
* CCosmoDoc::AddRef
* CCosmoDoc::Release
*
* Purpose:
* IUnknown members for the CCosmoDoc implementation.
*/
STDMETHODIMP CCosmoDoc::QueryInterface(REFIID riid, PPVOID ppv)
{
*ppv=NULL;
//The document is the unknown
if (IID_IUnknown==riid)
*ppv=(LPUNKNOWN)this;
//Return contained interfaces for others.
if (IID_IPolylineAdviseSink6==riid)
*ppv=m_pPLAdv;
if (IID_IAdviseSink==riid)
*ppv=m_pIAdviseSink;
if (NULL!=*ppv)
{
((LPUNKNOWN)*ppv)->AddRef();
return NOERROR;
}
return S_FALSE;
}
STDMETHODIMP_(ULONG) CCosmoDoc::AddRef(void)
{
return ++m_cRef;
}
STDMETHODIMP_(ULONG) CCosmoDoc::Release(void)
{
/*
* Since CoCosmo doesn't use documents like Component Objects,
* this doesn't do anything except provide a debugging point.
*/
return --m_cRef;
}
/*
* 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_DESTROY==iMsg)
{
if (NULL!=m_pIDataClip)
{
if (NOERROR==OleIsCurrentClipboard(m_pIDataClip))
OleFlushClipboard();
}
//CHAPTER8MOD
/*
* 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);
m_pDropTarget->Release();
}
//End CHAPTER8MOD
}
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;
}
//CHAPTER8MOD
if (WM_LBUTTONDOWN==iMsg)
{
LPDROPSOURCE pIDropSource;
LPDATAOBJECT pIDataObject;
HRESULT hr;
SCODE sc;
DWORD dwEffect;
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();
if (NULL!=pIDataObject)
{
hr=DoDragDrop(pIDataObject, pIDropSource
, DROPEFFECT_COPY | DROPEFFECT_MOVE, &dwEffect);
pIDataObject->Release();
sc=hr;
}
else
sc=E_FAIL;
pIDropSource->Release();
m_fDragSource=FALSE;
if (DRAGDROP_S_DROP==sc && DROPEFFECT_MOVE==dwEffect)
{
m_pPL->New();
FDirtySet(TRUE);
}
return TRUE;
}
//End CHAPTER8MOD
/*
* 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();
return;
}
/*
* CCosmoDoc::ULoad
*
* 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::ULoad(BOOL fChangeFile, LPTSTR pszFile)
{
HRESULT hr;
LPSTORAGE pIStorage;
if (NULL==pszFile)
{
/*
* As a user of an IPersistStorage we have to provide all
* objects with an IStorage they can use for incremental
* access passing that storage to InitNew. Here we create
* a temporary file that we don't bother holding on to.
* If the object doesn't use it, then our Release destroys
* it immediately.
*/
hr=StgCreateDocfile(NULL, STGM_DIRECT | STGM_READWRITE
| STGM_CREATE | STGM_DELETEONRELEASE
| STGM_SHARE_EXCLUSIVE, 0, &pIStorage);
if (FAILED(hr))
return DOCERR_COULDNOTOPEN;
m_pIPersistStorage->InitNew(pIStorage);
m_pIStorage=pIStorage;
Rename(NULL);
return DOCERR_NONE;
}
/*
* Open a storage and pass it to the Polyline via
* IPersistStorage. We do not remain compatible with
* previous files saved with Component Cosmo.
*/
#if defined(WIN32) && !defined(UNICODE)
OLECHAR pwcsFile[MAX_PATH];
mbstowcs(pwcsFile, pszFile, MAX_PATH);
hr=StgOpenStorage(pwcsFile, NULL, STGM_DIRECT | STGM_READWRITE
| STGM_SHARE_EXCLUSIVE, NULL, 0, &pIStorage);
#else
hr=StgOpenStorage(pszFile, NULL, STGM_DIRECT | STGM_READWRITE
| STGM_SHARE_EXCLUSIVE, NULL, 0, &pIStorage);
#endif
if (FAILED(hr))
return DOCERR_COULDNOTOPEN;
hr=m_pIPersistStorage->Load(pIStorage);
m_pIStorage=pIStorage;
if (FAILED(hr))
return DOCERR_READFAILURE;
if (fChangeFile)
Rename(pszFile);
//Importing a file makes things dirty
FDirtySet(!fChangeFile);
return DOCERR_NONE;
}
/*
* CCosmoDoc::USave
*
* Purpose:
* Writes the file to a known filename, requiring that the user
* has previously used FileOpen or FileSaveAs in order to have
* 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::USave(UINT uType, LPTSTR pszFile)
{
BOOL fRename=TRUE;
HRESULT hr;
LPSTORAGE pIStorage;
BOOL fSameAsLoad;
//If Save or Save As under the same name, do Save.
if (NULL==pszFile || 0==lstrcmpi(pszFile, m_szFile))
{
fRename=FALSE;
pszFile=m_szFile;
/*
* If we're saving to an existing storage, just pass
* the IStorage we have from ULoad along with TRUE
* in fSameAsLoad.
*/
fSameAsLoad=TRUE;
}
else
{
/*
* In Component Cosmo, we only deal with one version of
* data; all the code in Chapter 2 Cosmo that dealt with
* 1.0 and 2.0 files has been removed.
*/
#if defined(WIN32) && !defined(UNICODE)
OLECHAR pwcsFile[MAX_PATH];
mbstowcs(pwcsFile, pszFile, MAX_PATH);
hr=StgCreateDocfile(pwcsFile, STGM_DIRECT | STGM_READWRITE
| STGM_CREATE | STGM_SHARE_EXCLUSIVE, 0, &pIStorage);
#else
hr=StgCreateDocfile(pszFile, STGM_DIRECT | STGM_READWRITE
| STGM_CREATE | STGM_SHARE_EXCLUSIVE, 0, &pIStorage);
#endif
if (FAILED(hr))
return DOCERR_COULDNOTOPEN;
//Tell the object to save into this new storage
fSameAsLoad=FALSE;
//Update our variable
m_pIStorage->Release();
m_pIStorage=pIStorage;
}
hr=m_pIPersistStorage->Save(m_pIStorage, fSameAsLoad);
if (SUCCEEDED(hr))
{
hr=m_pIPersistStorage->SaveCompleted(fSameAsLoad
? NULL : m_pIStorage);
}
if (FAILED(hr))
return DOCERR_WRITEFAILURE;
//Saving makes us clean
FDirtySet(FALSE);
if (fRename)
Rename(pszFile);
return DOCERR_NONE;
}
/*
* CCosmoDoc::Undo
*
* Purpose:
* Reverses a previous action.
*
* Parameters:
* None
*
* Return Value:
* None
*/
void CCosmoDoc::Undo(void)
{
m_pPL->Undo();
return;
}
/*
* CCosmoDoc::FClip
*
* 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::FClip(HWND hWndFrame, BOOL fCut)
{
//CHAPTER8MOD
BOOL fRet=TRUE;
LPDATAOBJECT pIDataObject;
pIDataObject=TransferObjectCreate();
if (NULL==pIDataObject)
return FALSE;
//CHAPTER8MOD
fRet=SUCCEEDED(OleSetClipboard(pIDataObject));
if (NULL!=m_pIDataClip)
m_pIDataClip->Release();
m_pIDataClip=pIDataObject;
//Delete our current data if copying succeeded.
if (fRet && fCut)
{
m_pPL->New();
FDirtySet(TRUE);
}
return fRet;
}
/*
* 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;
//CHAPTER8MOD
fRet=FQueryPasteFromData(pIDataObject);
//End CHAPTER8MOD
pIDataObject->Release();
return fRet;
}
//CHAPTER8MOD
/*
* 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));
}
//End CHAPTER8MOD
/*
* CCosmoDoc::FPaste
*
* 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::FPaste(HWND hWndFrame)
{
LPDATAOBJECT pIDataObject;
BOOL fRet;
if (FAILED(OleGetClipboard(&pIDataObject)))
return FALSE;
//CHAPTER8MOD
fRet=FPasteFromData(pIDataObject);
//End CHAPTER8MOD
pIDataObject->Release();
return TRUE;
}
//CHAPTER8MOD
/*
* CCosmoDoc::FPasteFromData
* (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::FPasteFromData(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)
return FALSE;
if (fRet && NULL!=stm.hGlobal)
{
m_pPL->QueryInterface(IID_IDataObject
, (PPVOID)&pIDataObject);
pIDataObject->SetData(&fe, &stm, TRUE);
pIDataObject->Release();
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:
* None
*
* Return Value:
* LPDATAOBJECT Pointer to the object created, NULL on failure
*/
LPDATAOBJECT CCosmoDoc::TransferObjectCreate(void)
{
UINT i;
HRESULT hr;
STGMEDIUM stm;
FORMATETC fe;
LPDATAOBJECT pIDataSrc;
LPDATAOBJECT pIDataObject=NULL;
const UINT cFormats=3;
static UINT rgcf[3]={0, CF_METAFILEPICT, CF_BITMAP};
static DWORD rgtm[3]={TYMED_HGLOBAL, TYMED_MFPICT
, TYMED_GDI};
hr=CoCreateInstance(CLSID_DataTransferObject, NULL
, CLSCTX_INPROC_SERVER, IID_IDataObject
, (PPVOID)&pIDataObject);
if (FAILED(hr))
return NULL;
rgcf[0]=m_cf;
hr=m_pPL->QueryInterface(IID_IDataObject, (PPVOID)&pIDataSrc);
if (FAILED(hr))
{
pIDataObject->Release();
return NULL;
}
for (i=0; i < cFormats; i++)
{
//Copy private data first.
SETDefFormatEtc(fe, rgcf[i], rgtm[i]);
if (SUCCEEDED(pIDataSrc->GetData(&fe, &stm)))
pIDataObject->SetData(&fe, &stm, TRUE);
}
pIDataSrc->Release();
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;
m_pPL->Window(&hWnd);
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;
}
//End CHAPTER8MOD
/*
* 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;
m_pPL->LineStyleGet(&i);
return i;
}