SDI实现多视图并切换视图

winzenghua

首先在H文件有如下声明：

class CMultiViewApp : public CWinApp<?XML:NAMESPACE PREFIX = O />

{

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->m_hWnd, GWL_ID);

::SetWindowLong(m_pOtherView->m_hWnd, GWL_ID, ::GetWindowLong(m_pFirstView->m_hWnd, GWL_ID));

::SetWindowLong(m_pFirstView->m_hWnd, GWL_ID, temp);

m_pFirstView->ShowWindow(SW_HIDE);

m_pOtherView->ShowWindow(SW_SHOW);  

((CFrameWnd*)m_pMainWnd)->SetActiveView(m_pOtherView);

((CFrameWnd*) m_pMainWnd)->RecalcLayout();

m_pOtherView->Invalidate();

}

void CMultiViewApp::OnViewFirstview()

{

// TODO: Add your command handler code here

UINT temp = ::GetWindowLong(m_pOtherView->m_hWnd, GWL_ID); //GetWindowWord()

::SetWindowLong(m_pOtherView->m_hWnd, GWL_ID, ::GetWindowLong(m_pFirstView->m_hWnd, GWL_ID));//SetWindowWord()

::SetWindowLong(m_pFirstView->m_hWnd, GWL_ID, temp);//SetWindowWord()

m_pOtherView->ShowWindow(SW_HIDE);

m_pFirstView->ShowWindow(SW_SHOW);  

((CFrameWnd*)m_pMainWnd)->SetActiveView(m_pFirstView);

((CFrameWnd*)m_pMainWnd)->RecalcLayout();

m_pFirstView->Invalidate();

}

2. SDI单文档多视图实现方法2

void CMultiViewApp::OnViewChange(UINT nCmdID)

{

//另外一种方法实现SDI的多视图切换

CView* pViewAdd;

CView* pViewRemove;

CMainFrame* pMainFrame=(CMainFrame*)AfxGetMainWnd();

CDocument* pDoc = pMainFrame->GetActiveDocument();

if((nCmdID == ID_VIEW_VIEW1<span style="font-size: 12pt; color: black;">) &&