IFILEVW.CPP

//THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF  
//ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO  
//THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A  
// PARTICULAR PURPOSE. 
// 
// Copyright 1994 - 1998 Microsoft Corporation.  All Rights Reserved. 
// 
//PROGRAM:IFILEVW.CPP 
// 
//PURPOSE: IFileViewer interface implementation for a FileViewer. 
// Custom FileViewer objects should modify the Show member 
// to suit its own needs.  
// 
//PLATFORMS:Windows 95 
// 
//SPECIAL INSTRUCTIONS: N/A 
// 
 
#include "fileview.h" 
 
// 
//   FUNCTION: CImpIFileViewer::CImpIFileViewer 
// 
//   PURPOSE:   Constructor 
// 
//   PARAMETERS:  
//  pObj            PCFileViewer of the object we're in. 
//    pUnkOuter       LPUNKNOWN to which we delegate. 
// 
CImpIFileViewer::CImpIFileViewer(PCFileViewer pObj 
    , LPUNKNOWN pUnkOuter) 
    { 
    m_pObj=pObj; 
    m_pUnkOuter=pUnkOuter; 
    return; 
    }  
// 
//   FUNCTION: CImpIFileViewer::~CImpIFileViewer 
// 
//   PURPOSE:   Destructor 
// 
CImpIFileViewer::~CImpIFileViewer(void) 
    { 
    return;    
    } 
// 
//   FUNCTION: CImpIFileViewer::QueryInterface 
// CImpIFileViewer::AddRef   
// CImpIFileViewer::Release 
// 
//   PURPOSE:    IUnknown members for CImpIFileViewer object that only delegate. 
// 
STDMETHODIMP CImpIFileViewer::QueryInterface(REFIID riid 
    , PPVOID ppv) 
    { 
    return m_pUnkOuter->QueryInterface(riid, ppv); 
    } 
 
STDMETHODIMP_(ULONG) CImpIFileViewer::AddRef(void) 
    { 
    return m_pUnkOuter->AddRef(); 
    } 
 
STDMETHODIMP_(ULONG) CImpIFileViewer::Release(void) 
    { 
    return m_pUnkOuter->Release(); 
    } 
// 
//   FUNCTION:CImpIFileViewer::PrintTo  
// 
//   PURPOSE:    Asks a FileViewer to print the file that came through 
//  IPersistFile::Load to a specific device with or without 
//  any user interaction.  This function should not return 
//  until the printing is complete. 
// 
//   PARAMETERS:  
//    pszDriver       LPSTR with the path of the driver to use.  If NULL, use the default driver. 
//      fSuppressUI     BOOL indicating if this function is to show anyUI or not. 
// 
//   RETURN VALUE: 
//  HRESULT         NOERROR on success, error code otherwise. 
// 
STDMETHODIMP CImpIFileViewer::PrintTo(LPSTR pszDriver 
    , BOOL fSuppressUI) 
    { 
     // Printing not implemented in this sample, but 
     // make a stub call anyway. 
    return m_pObj->PrintTo(pszDriver, fSuppressUI); 
    } 
// 
//   FUNCTION: CImpIFileViewer::ShowInitialize 
// 
//   PURPOSE:  Initializes everything necessary to display the FileViewer 
//  window but does not show it.  The FileViewer should do all 
//  the necessary pre-visible work here as this is the only 
//  time the FileViewer is allowed to fail.  
// 
//   PARAMETERS:  
// 
//   RETURN VALUE: 
//   HRESULT         NOERROR or an appropriate error code such as 
//                  E_UNEXPECTED, E_FAIL, or E_OUTOFMEMORY. 
// 
STDMETHODIMP CImpIFileViewer::ShowInitialize(LPFILEVIEWERSITE lpfsi) 
    { 
    return m_pObj->FileShowInit(lpfsi); 
    } 
// 
//   FUNCTION:CImpIFileViewer::Show  
// 
//   PURPOSE:    Displays the FileViewer's window in which the file is 
//  displayed.  This function cannot be called unless 
//  Initialize has already been called.  If Initialize has 
//  been called then this function is not allowed to fail and 
//  should do little more than show the window and enter a 
//  message loop, that is, perform no allocations or anything 
//  else that may fail due to low-memory conditions. 
// 
//  Treat this function like a WinMain function. 
// 
//   PARAMETERS:  
//    nCmdShow        int indicating how to initially show the FileViewer window. 
// 
//   RETURN VALUE: 
//    HRESULT         E_UNEXPECTED if Initalize has not been called, otherwise must be NOERROR. 
// 
STDMETHODIMP CImpIFileViewer::Show(LPFVSHOWINFO pvsi) 
    { 
    if (!m_pObj->m_fShowInit) 
        return ResultFromScode(E_UNEXPECTED); 
 
    m_pObj->FileShow(pvsi); 
    return NOERROR; 
    }