首先在H文件有如下声明：
class CMultiViewApp : public CWinApp
{
public:
CView* m_pFirstView;
CView* m_pOtherView;
int m_currentView;
CView* m_pView2;
CView* m_pView1;
CMultiViewApp();
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMultiViewApp)
public:
virtual BOOL InitInstance();
//}}AFX_VIRTUAL
// Implementation
//{{AFX_MSG(CMultiViewApp)
afx_msg void OnAppAbout();
afx_msg void OnViewOtherview();
afx_msg void OnViewFirstview();
//}}AFX_MSG
afx_msg void OnViewChange(UINT nCmdID);
DECLARE_MESSAGE_MAP()
};
其次，在CPP文件有如下消息MAP：
/////////////////////////////////////////////////////////////////////////////
// CMultiViewApp
BEGIN_MESSAGE_MAP(CMultiViewApp, CWinApp)
//{{AFX_MSG_MAP(CMultiViewApp)
ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
ON_COMMAND(ID_VIEW_OTHERVIEW, OnViewOtherview)
ON_COMMAND(ID_VIEW_FIRSTVIEW, OnViewFirstview)
//}}AFX_MSG_MAP
// Standard file based document commands
ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew)
ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen)
// Standard print setup command
ON_COMMAND(ID_FILE_PRINT_SETUP, CWinApp::OnFilePrintSetup)
ON_COMMAND_RANGE( ID_VIEW_VIEW1, ID_VIEW_VIEW2, OnViewChange)
END_MESSAGE_MAP()
说明:SDI程序在CMyApp::InitInstance()已经通过DocTemplate创建一个关联的视图/文档实例,切显示出来.具体实现如下:
BOOL CMultiViewApp::InitInstance()
{
AfxEnableControlContainer();
// Standard initialization
// If you are not using these features and wish to reduce the size
// of your final executable, you should remove from the following
// the specific initialization routines you do not need.
#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif
// Change the registry key under which our settings are stored.
// TODO: You should modify this string to be something appropriate
// such as the name of your company or organization.
SetRegistryKey(_T("Local AppWizard-Generated Applications"));
LoadStdProfileSettings(); // Load standard INI file options (including MRU)
// Register the application's document templates. Document templates
// serve as the connection between documents, frame windows and views.
CSingleDocTemplate* pDocTemplate;
pDocTemplate = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CMultiViewDoc),
RUNTIME_CLASS(CMainFrame), // main SDI frame window
RUNTIME_CLASS(CMultiViewView));
AddDocTemplate(pDocTemplate);
// Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);
// Dispatch commands specified on the command line
if (!ProcessShellCommand(cmdInfo))
return FALSE;
CView* pActiveView = ((CFrameWnd*) m_pMainWnd)->GetActiveView();
m_pFirstView = pActiveView;
m_pOtherView = (CView*) new COtherView;
CDocument* pDoc = ((CFrameWnd*)m_pMainWnd)->GetActiveDocument();
//通过CCreateContext实现第二视图和文档的关联
CCreateContext context;
context.m_pCurrentDoc = pDoc;
UINT m_ID = AFX_IDW_PANE_FIRST + 1;
CRect rect;
//为了演示第一种多视图是实现方法,把Vew的实例创建放在了这里
m_pOtherView->Create(NULL, NULL, WS_CHILD, rect, m_pMainWnd, m_ID, &context);
// The one and only window has been initialized, so show and update it.
m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
m_pMainWnd->UpdateWindow();
m_currentView=1;
return TRUE;
}
1. SDI单文档多视图实现方法1
void CMultiViewApp::OnViewOtherview()
{
// TODO: Add your command handler code here
UINT temp = ::GetWindowLong(m_pOtherView