用VC 实现应用程序窗口的任意分割

{
　if (!UpdateData())
　　return;
　CMainDoc* pDoc = GetDocument();
　COLORREF color = RGB(255 * (m_iColor == 0),
　255 * (m_iColor == 1),
　255 * (m_iColor == 2));
　BOOL bUpdate = FALSE;
　if (m_strData != pDoc->m_strData)
　{
　　pDoc->m_strData = m_strData;
　　bUpdate = TRUE;
　}
　if (color != pDoc->m_colorData)
　{
　　pDoc->m_colorData = color;
　　bUpdate = TRUE;
　}
　if (bUpdate)
　{
　　// if the document stored data then we would call SetModifiedFlag here
　　pDoc->UpdateAllViews(this);
　}
}
/////////////////////////////////////////////////////simpvw.h文件
class CTextView : public CView
{
　protected: // create from serialization only
　　CTextView();
　　DECLARE_DYNCREATE(CTextView)
　　// Attributes
　public:
　　CMainDoc* GetDocument()
　　{
　　　ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMainDoc)));
　　　return (CMainDoc*) m_pDocument;
　　}
　　// Operations
　public:
　　// Implementation
　public:
　　virtual ~CTextView();
　　virtual void OnDraw(CDC* pDC); // overridden to draw this view
　　// Generated message map functions
　protected:
　　//{{AFX_MSG(CTextView)
　　　afx_msg int OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT message);
　　//}}AFX_MSG
　　DECLARE_MESSAGE_MAP()
};
class CColorView : public CView
{
　protected: // create from serialization only
　　CColorView();
　　DECLARE_DYNCREATE(CColorView)
　　// Attributes
　public:
　　CMainDoc* GetDocument()
　　{
　　　ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMainDoc)));
　　　return (CMainDoc*) m_pDocument;
　　}

　　// Operations
　public:
　　// Implementation
　public:
　　virtual ~CColorView();
　　virtual void OnDraw(CDC* pDC); // overridden to draw this view
　　virtual void OnActivateView(BOOL bActivate, CView* pActivateView,
　　CView* pDeactiveView);
　　// Generated message map functions
　protected:
　　//{{AFX_MSG(CColorView)
　　　afx_msg int OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT message);
　　//}}AFX_MSG
　DECLARE_MESSAGE_MAP()
};
////////////////////////////////simpvw.cpp文件；
#include "stdafx.h"
#include "viewex.h"
#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
/////////////////////////CTextView
IMPLEMENT_DYNCREATE(CTextView, CView)
BEGIN_MESSAGE_MAP(CTextView, CView)
　//{{AFX_MSG_MAP(CTextView)
　　ON_WM_MOUSEACTIVATE()
　//}}AFX_MSG_MAP
END_MESSAGE_MAP()
// CTextView construction/destruction
CTextView::CTextView()
{}

CTextView::~CTextView()
{}

void CTextView::OnDraw(CDC* pDC)
{
　CMainDoc* pDoc = GetDocument();
　CRect rect;
　GetClientRect(rect);
　pDC->SetTextAlign(TA_BASELINE | TA_CENTER);
　pDC->SetTextColor(pDoc->m_colorData);
　pDC->SetBkMode(TRANSPARENT);
　// center in the window
　pDC->TextOut(rect.Width() / 2, rect.Height() / 2,
　pDoc->m_strData, pDoc->m_strData.GetLength());
}

int CTextView::OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT message)
{
　// side-step CView's implementation since we don't want to activate
　// this view
　return CWnd::OnMouseActivate(pDesktopWnd, nHitTest, message);
}
////////////////////////// CColorView
IMPLEMENT_DYNCREATE(CColorView, CView)
BEGIN_MESSAGE_MAP(CColorView, CView)
　//{{AFX_MSG_MAP(CColorView)
　　ON_WM_MOUSEACTIVATE()
　//}}AFX_MSG_MAP
END_MESSAGE_MAP()
// CColorView construction/destruction
CColorView::CColorView()
{}
CColorView::~CColorView()
{}

void CColorView::OnDraw(CDC* pDC)
{
　CMainDoc* pDoc = GetDocument();
　CRect rect;
　GetClientRect(rect);
　// fill the view with the specified color
　CBrush br(pDoc->m_colorData);
　pDC->FillRect(rect, &br);
}

int CColorView::OnMouseActivate(CWnd* pDesktopWnd, UINT nHitTest, UINT message)
{
　// side-step CView's implementation since we don't want to activate
　// this view
　return CWnd::OnMouseActivate(pDesktopWnd, nHitTest, message);
}

void CColorView::OnActivateView(BOOL, CView*, CView*)
{
　ASSERT(FALSE); // output only view - should never be active
}
///////////////////////////////////////// splitter.h文件；
// CSplitterFrame frame with splitter/wiper
class CSplitterFrame : public CMDIChildWnd
{
　DECLARE_DYNCREATE(CSplitterFrame)
　protected:
　　CSplitterFrame(); // protected constructor used by dynamic creation
　　// Attributes
　protected:
　　CSplitterWnd m_wndSplitter;
　　// Implementation
　public:
　　virtual ~CSplitterFrame();
　　virtual BOOL OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext);
　　// Generated message map functions
　　//{{AFX_MSG(CSplitterFrame)
　　//}}AFX_MSG
　DECLARE_MESSAGE_MAP()
};

class CViewExSplitWnd : public CSplitterWnd

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