如何实现SDI程序使用CSplitterWnd创建的多个视图的动态地显示和关闭视图

为了实现该功能我们需要对CSplitterWnd进行增强，具体实现如下：

一、定义头文件

显示代码打印01 //////////////////////////////////////////////////////////////////

02 //

03 // splitex.h

04 class CSplitterWndEx : public CSplitterWnd

05 {

06 protected:

07 int m_nHidedCol; // hide column number, -1 if all columns

08 // are shown

09

10 public:

11 CSplitterWndEx();

12

13 void ShowColumn();

14 void HideColumn(int colHide);

15

16 // ClassWizard generated virtual function overrides

17 //{{AFX_VIRTUAL(CSplitterWndEx)

18 //}}AFX_VIRTUAL

19

20 // Generated message map functions

21 protected:

22 //{{AFX_MSG(CSplitterWndEx)

23 // NOTE - the ClassWizard will add and remove member

24 // functions here.

25 //}}AFX_MSG

26

27 DECLARE_MESSAGE_MAP()

28 };

二、具体实现代码

显示代码打印001 //////////////////////////////////////////////////////////////////

002 //

003 // splitex.cpp

004 #include "stdafx.h"

005 #include "splitex.h"

006

007 #ifdef _DEBUG

008 #define new DEBUG_NEW

009 #undef THIS_FILE

010 static char THIS_FILE[] = __FILE__;

011 #endif

012

013 //////////////////////////////////////////////////////////////////

014 /

015 // CSplitterWndEx

016

017 CSplitterWndEx::CSplitterWndEx() :

018 m_nHidedCol(-1)

019 {

020 }

021

022 void CSplitterWndEx::ShowColumn()

023 {

024 ASSERT_VALID(this);

025 ASSERT(m_nCols < m_nMaxCols);

026 ASSERT(m_nHidedCol != -1);

027

028 int colNew = m_nHidedCol;

029 m_nHidedCol = -1;

030 int cxNew = m_pColInfo[m_nCols].nCurSize;

031 m_nCols++; // add a column

032 ASSERT(m_nCols == m_nMaxCols);

033

034 // fill the hidden column

035 int col;

036 for (int row = 0; row < m_nRows; row++)

037 {

038 CWnd* pPaneShow = GetDlgItem(

039 AFX_IDW_PANE_FIRST + row * 16 + m_nCols);

040 ASSERT(pPaneShow != NULL);

041 pPaneShow->ShowWindow(SW_SHOWNA);

042

043 for (col = m_nCols - 2; col >= colNew; col--)

044 {

045 CWnd* pPane = GetPane(row, col);

046 ASSERT(pPane != NULL);

047 pPane->SetDlgCtrlID(IdFromRowCol(row, col + 1));

048 }

049

050 pPaneShow->SetDlgCtrlID(IdFromRowCol(row, colNew));

051 }

052

053 // new panes have been created -- recalculate layout

054 for (col = colNew + 1; col < m_nCols; col++)

055 m_pColInfo[col].nIdealSize = m_pColInfo[col - 1].nCurSize;

056 m_pColInfo[colNew].nIdealSize = cxNew;

057 RecalcLayout();

058 }

059

060 void CSplitterWndEx::HideColumn(int colHide)

061 {

062 ASSERT_VALID(this);

063 ASSERT(m_nCols > 1);

064 ASSERT(colHide < m_nCols);

065 ASSERT(m_nHidedCol == -1);

066 m_nHidedCol = colHide;

067

068 // if the column has an active window -- change it

069 int rowActive, colActive;

070 if (GetActivePane(&rowActive, &colActive) != NULL &&

071 colActive == colHide)

072 {

073 if (++colActive >= m_nCols)

074 colActive = 0;

075 SetActivePane(rowActive, colActive);

076 }

077

078 // hide all column panes

079 for (int row = 0; row < m_nRows; row++)

080 {

081 CWnd* pPaneHide = GetPane(row, colHide);

082 ASSERT(pPaneHide != NULL);

083 pPaneHide->ShowWindow(SW_HIDE);

084 pPaneHide->SetDlgCtrlID(

085 AFX_IDW_PANE_FIRST + row * 16 + m_nCols);

086

087 for (int col = colHide + 1; col < m_nCols; col++)

088 {

089 CWnd* pPane = GetPane(row, col);

090 ASSERT(pPane != NULL);

091 pPane->SetDlgCtrlID(IdFromRowCol(row, col - 1));

092 }

093 }

094 m_nCols--;

095 m_pColInfo[m_nCols].nCurSize = m_pColInfo[colHide].nCurSize;

096 RecalcLayout();

097 }

098

099 BEGIN_MESSAGE_MAP(CSplitterWndEx, CSplitterWnd)

100 //{{AFX_MSG_MAP(CSplitterWndEx)

101 // NOTE - the ClassWizard will add and remove mapping macros here.

102 //}}AFX_MSG_MAP

103 END_MESSAGE_MAP()

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