MFC文档视图（三）

一，[FILE/CLOSE]的实现过程：

1.CDocument::OnFileClose()

void CDocument::OnFileClose()
{
 if (!SaveModified())
  return;

 OnCloseDocument();
}

2.CDocument::SaveModified()

BOOL CDocument::SaveModified()
{
 //内容是否更改，如果没有直接返回
 if (!IsModified())
  return TRUE;

 //获得文档的标题和名字.....

 //弹出提示框，告诉用户是否保存
 CString prompt;
 AfxFormatString1(prompt, AFX_IDP_ASK_TO_SAVE, name);
 switch (AfxMessageBox(prompt, MB_YESNOCANCEL, AFX_IDP_ASK_TO_SAVE))
 {
 case IDCANCEL:
  return FALSE;       // 取消
 case IDYES:
  if (!DoFileSave())
   return FALSE;       // 保存
  break;
 case IDNO:      //不保存
  break;
 default:
  ASSERT(FALSE);
  break;
 }
 return TRUE;    // keep going
}

 

3.CDocument::OnCloseDocument()

void CDocument::OnCloseDocument()
{
 BOOL bAutoDelete = m_bAutoDelete;
 m_bAutoDelete = FALSE;  // don't destroy document while closing views
 while (!m_viewList.IsEmpty())
 {
  // View的外围的Frame
  CView* pView = (CView*)m_viewList.GetHead();
  ASSERT_VALID(pView);
  CFrameWnd* pFrame = pView->EnsureParentFrame();

  //关闭Frame，这也将销毁view
  PreCloseFrame(pFrame);
  pFrame->DestroyWindow();
 }
 m_bAutoDelete = bAutoDelete;

 DeleteContents();
 // delete the document if necessary
 if (m_bAutoDelete)
  delete this;
}

 

二，[FILE/SAVE]的处理过程

1.CDocument::OnFileSave()

void CDocument::OnFileSave()
{
 DoFileSave();
}

 

2.CDocument::DoFileSave()

BOOL CDocument::DoFileSave()
{
 //获得文件属性
 DWORD dwAttrib = GetFileAttributes(m_strPathName);
 if (dwAttrib & FILE_ATTRIBUTE_READONLY)
 {    //没有读写权限或文件不存在
  if (!DoSave(NULL))
  {
   return FALSE;
  }
 }
 else
 {   //保存文件
  if (!DoSave(m_strPathName))
  {
   return FALSE;
  }
 }
 return TRUE;
}

 

3.CDocument::DoSave

BOOL CDocument::DoSave(LPCTSTR lpszPathName, BOOL bReplace)
{
 CString newName = lpszPathName;
 //如果文件名为空:[FILE/SAVEAS]
 if (newName.IsEmpty())
 {
  //获得文件名
 }

 //打开文件选择对话框
 if (!AfxGetApp()->DoPromptFileName(newName,
   bReplace ? AFX_IDS_SAVEFILE : AFX_IDS_SAVEFILECOPY,
   OFN_HIDEREADONLY | OFN_PATHMUSTEXIST, FALSE, pTemplate))
  return FALSE;
 }

    //保存文档内容
 OnSaveDocument(newName);
 return TRUE;
}

 

4. CDocument::OnSaveDocument

BOOL CDocument::OnSaveDocument(LPCTSTR lpszPathName)
{
 //打开文件
 CFileException fe;
 CFile* pFile = NULL;
 pFile = GetFile(lpszPathName, CFile::modeCreate |CFile::modeReadWrite | CFile::shareExclusive, &fe);

 CArchive saveArchive(pFile, CArchive::store | CArchive::bNoFlushOnDelete);
 saveArchive.m_pDocument = this;
 saveArchive.m_bForceFlat = FALSE;
 TRY
 {
  Serialize(saveArchive);     // 序列化保存
  saveArchive.Close();
  ReleaseFile(pFile, FALSE);
 }
 CATCH_ALL(e)
 {
  ReleaseFile(pFile, TRUE);
  return FALSE;
 }
 END_CATCH_ALL

 SetModifiedFlag(FALSE);     // back to unmodified

 return TRUE;        // success
}

 

三,[FILE/SAVEAS]的处理过程

void CDocument::OnFileSaveAs()
{
 if(!DoSave(NULL))
  TRACE(traceAppMsg, 0, "Warning: File save-as failed./n");
}

然后与[FILE/SAVE]处理一样