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覆巢之下焉有完卵。出来道上混,迟早是要还的。

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VC6绘图练习(2)：为菜单增加命令响应等

2008-04-19 23:29:21| 分类： VC++ | 标签： |举报 |字号大中小订阅

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COMMAND

ADD FUNCTION

Member functions：里多了一项OnDot ，这个函数名是编辑器根据菜单自动默认的，当然在添加命令响应的时候也可以更改。

编辑代码：

复制此时的代码，如下：// MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "Graphic.h"

#include "MainFrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMainFrame

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
ON_WM_CREATE()
ON_COMMAND(IDM_DOT, OnDot)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

static UINT indicators[] =
{
ID_SEPARATOR, // status line indicator
ID_INDICATOR_CAPS,
ID_INDICATOR_NUM,
ID_INDICATOR_SCRL,
};

/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
// TODO: add member initialization code here

}

CMainFrame::~CMainFrame()
{
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

if (!m_wndStatusBar.Create(this) ||
  !m_wndStatusBar.SetIndicators(indicators,
    sizeof(indicators)/sizeof(UINT)))
{
  TRACE0("Failed to create status bar\n");
  return -1;      // fail to create
}

return 0;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
if( !CFrameWnd::PreCreateWindow(cs) )
return FALSE;
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
CFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
CFrameWnd::Dump(dc);
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers

void CMainFrame::OnDot()
{
// TODO: Add your command handler code here

}

如果刚才不点“编辑代码”按钮，那么，可以如下图所示找到代码：

ClassView选项卡，CMainFrame，OnDot()，双击，右侧的代码框与点“编辑代码”出现的是一样的。

同样的方法，为点、直线、矩形、椭圆增加命令响应，但这只是有了响应而已，具体的响应代码还需手动编写。

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