{
DECLARE_DYNAMIC(CViewExSplitWnd)
// Implementation
public:
CViewExSplitWnd();
~CViewExSplitWnd();
CWnd* GetActivePane(int* pRow = NULL, int* pCol = NULL);
};
class C3WaySplitterFrame : public CMDIChildWnd
{
DECLARE_DYNCREATE(C3WaySplitterFrame)
protected:
C3WaySplitterFrame(); // protected constructor used by dynamic creation
// Attributes
protected:
CViewExSplitWnd m_wndSplitter;
CViewExSplitWnd m_wndSplitter2; // embedded in the first
// Implementation
public:
virtual ~C3WaySplitterFrame();
virtual BOOL OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext);
// Generated message map functions
//{{AFX_MSG(C3WaySplitterFrame)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
/////////////////////////////splitter.cpp文件；
#include "stdafx.h"
#include "viewex.h"
#include "splitter.h"
#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
// CSplitterFrame
// Create a splitter window which splits an output text view and an input view
// |
// TEXT VIEW (CTextView) | INPUT VIEW (CInputView)
// |
IMPLEMENT_DYNCREATE(CSplitterFrame, CMDIChildWnd)
CSplitterFrame::CSplitterFrame()
{}
CSplitterFrame::~CSplitterFrame()
{}
BOOL CSplitterFrame::OnCreateClient(LPCREATESTRUCT,
CCreateContext* pContext)
{
// create a splitter with 1 row, 2 columns
if (!m_wndSplitter.CreateStatic(this, 1, 2))
{
TRACE0("Failed to CreateStaticSplitter\n");
return FALSE;
}
// add the first splitter pane - the default view in column 0
if (!m_wndSplitter.CreateView(0, 0,pContext->m_pNewViewClass, CSize(130, 50), pContext))
{
TRACE0("Failed to create first pane\n");
return FALSE;
}
// add the second splitter pane - an input view in column 1
if (!m_wndSplitter.CreateView(0, 1,RUNTIME_CLASS(CInputView), CSize(0, 0), pContext))
{
TRACE0("Failed to create second pane\n");
return FALSE;
}
// activate the input view
SetActiveView((CView*)m_wndSplitter.GetPane(0,1));
return TRUE;
}
BEGIN_MESSAGE_MAP(CSplitterFrame, CMDIChildWnd)
//{{AFX_MSG_MAP(CSplitterFrame)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
// C3WaySplitterFrame - just like CSplitterFrame except the input view is
// the first pane, and there are two output views
// | Text View (CTextView)
// INPUT VIEW (CInputView) |------------------------
// | Color View (CColorView)
IMPLEMENT_DYNCREATE(C3WaySplitterFrame, CMDIChildWnd)
C3WaySplitterFrame::C3WaySplitterFrame()
{}
C3WaySplitterFrame::~C3WaySplitterFrame()
{}
BOOL C3WaySplitterFrame::OnCreateClient(LPCREATESTRUCT lpcs,CCreateContext* pContext)
{
// create a splitter with 1 row, 2 columns
if (!m_wndSplitter.CreateStatic(this, 1, 2))
{
TRACE0("Failed to CreateStaticSplitter\n");
return FALSE;
}
// add the first splitter pane - the default view in column 0
if (!m_wndSplitter.CreateView(0, 0,pContext->m_pNewViewClass, CSize(200, 50), pContext))
{
TRACE0("Failed to create first pane\n");
return FALSE;
}
// add the second splitter pane - which is a nested splitter with 2 rows
if (!m_wndSplitter2.CreateStatic(&m_wndSplitter, // our parent window is the first splitter
2, 1, // the new splitter is 2 rows, 1 column
WS_CHILD | WS_VISIBLE | WS_BORDER, // style, WS_BORDER is needed
m_wndSplitter.IdFromRowCol(0, 1) ))
// new splitter is in the first row, 2nd column of first splitter
{
TRACE0("Failed to create nested splitter\n");
return FALSE;
}
// now create the two views inside the nested splitter
int cyText = max(lpcs->cy - 70, 20); // height of text pane
if (!m_wndSplitter2.CreateView(0, 0,RUNTIME_CLASS(CTextView), CSize(0, cyText), pContext))
{
TRACE0("Failed to create second pane\n");
return FALSE;
}
if (!m_wndSplitter2.CreateView(1, 0,RUNTIME_CLASS(CColorView), CSize(0, 0), pContext))
{
TRACE0("Failed to create third pane\n");
return FALSE;
}
// it all worked, we now have two splitter windows which contain
// three different views
return TRUE;
}
BEGIN_MESSAGE_MAP(C3WaySplitterFrame, CMDIChildWnd)
//{{AFX_MSG_MAP(C3WaySplitterFrame)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
IMPLEMENT_DYNAMIC(CViewExSplitWnd, CSplitterWnd)
CViewExSplitWnd::CViewExSplitWnd()
{}
CViewExSplitWnd::~CViewExSplitWnd()
{}
CWnd* CViewExSplitWnd::GetActivePane(int* pRow, int* pCol)
{
ASSERT_VALID(this);
// attempt to use active view of frame window
CWnd* pView = NULL;
CFrameWnd* pFrameWnd = GetParentFrame();
ASSERT_VALID(pFrameWnd);
pView = pFrameWnd->GetActiveView();
// failing that, use the current focus
if (pView == NULL)
pView = GetFocus();
return pView;
}
四、小结
本实例通过灵活运用CsplitterWnd类，实现了窗口的任意拆分。另外，需要补充的内容是，在具体应用中可以通过对CSplitterWnd原有方法的覆盖或者增加新的方法来扩展CSplitterWnd。我们在此仅举两个方面的例子，一是锁定切分条；二是定制自己的切分条。对于锁定切分条，不希望用户通过拖动切分条来调节窗口的大小这个问题，最简单的解决方法莫过于不让CSplitterWnd来处理WM_LBUTTONDOWN,WM_MOUSEMOVE,WM_SETCURSOR消息，而是将这些消息交给CWnd窗口进行处理，从而屏蔽掉这些消息。那么如何定制自己的切分条呢？通过重载CSplitterWnd的虚方法OnDrawSplitter（）和OnInvertTracker（）可以达到这样的目的。下面的代码生成的效果是分割窗口的边界颜色为红色，分割条的颜色为绿色代码如下：
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