在利用
VC
＋
MFC
编程的时候，我们往往能碰到这种情况：在一个模拟程序中（如有些游戏），需要实时显示一些属性的值（文字或者图形），这个时候我们可以重新打开一个对话框（可以是一个模态或者非模态的）来显示这些信息，本文以模态对话框为例，简单实现这个技术。以下代码阴影部分是我利用
ClassWizard
加的，蓝色部分是我手工加的。其余是用
MFC
向导生成的：
源代码下载地址：http://www.cppblog.com/Files/sscchh-2000/NotifyDialog.rar
// NotifyDialogView.h : interface of the CNotifyDialogView class
//
/////////////////////////////////////////////////////////////////////////////
#if !defined(AFX_NOTIFYDIALOGVIEW_H__8242946E_9215_46D8_8EAC_DFC7452C8076__INCLUDED_)
#define AFX_NOTIFYDIALOGVIEW_H__8242946E_9215_46D8_8EAC_DFC7452C8076__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include "CountDlg.h"
class CNotifyDialogView : public CScrollView
{
protected: // create from serialization only
CNotifyDialogView();
DECLARE_DYNCREATE(CNotifyDialogView)
// Attributes
public:
CNotifyDialogDoc* GetDocument();
CCountDlg *m_pCountDlg;
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CNotifyDialogView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual void OnInitialUpdate(); // called first time after construct
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CNotifyDialogView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
protected:
// Generated message map functions
protected:
//{{AFX_MSG(CNotifyDialogView)
afx_msg void OnTimer(UINT nIDEvent);
afx_msg void OnCountDialog();
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnDestroy();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
#ifndef _DEBUG // debug version in NotifyDialogView.cpp
inline CNotifyDialogDoc* CNotifyDialogView::GetDocument()
{ return (CNotifyDialogDoc*)m_pDocument; }
#endif
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_NOTIFYDIALOGVIEW_H__8242946E_9215_46D8_8EAC_DFC7452C8076__INCLUDED_)
// NotifyDialogView.cpp : implementation of the CNotifyDialogView class
//
#include "stdafx.h"
#include "NotifyDialog.h"
#include "NotifyDialogDoc.h"
#include "NotifyDialogView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CNotifyDialogView
IMPLEMENT_DYNCREATE(CNotifyDialogView, CScrollView)
BEGIN_MESSAGE_MAP(CNotifyDialogView, CScrollView)
//{{AFX_MSG_MAP(CNotifyDialogView)
ON_WM_TIMER()
ON_COMMAND(ID_COUNT_DIALOG, OnCountDialog)
ON_WM_CREATE()
ON_WM_DESTROY()
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CNotifyDialogView construction/destruction
CNotifyDialogView::CNotifyDialogView()
{
// TODO: add construction code here
m_pCountDlg = NULL;
}
CNotifyDialogView::~CNotifyDialogView()
{
}
BOOL CNotifyDialogView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CScrollView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CNotifyDialogView drawing
void CNotifyDialogView::OnDraw(CDC* pDC)
{
CNotifyDialogDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
}
void CNotifyDialogView::OnInitialUpdate()
{
CScrollView::OnInitialUpdate();
CSize sizeTotal;
// TODO: calculate the total size of this view
sizeTotal.cx = sizeTotal.cy = 100;
SetScrollSizes(MM_TEXT, sizeTotal);
}
/////////////////////////////////////////////////////////////////////////////
// CNotifyDialogView printing
BOOL CNotifyDialogView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CNotifyDialogView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CNotifyDialogView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CNotifyDialogView diagnostics
#ifdef _DEBUG
void CNotifyDialogView::AssertValid() const
{
CScrollView::AssertValid();
}
void CNotifyDialogView::Dump(CDumpContext& dc) const
{
CScrollView::Dump(dc);
}
CNotifyDialogDoc* CNotifyDialogView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CNotifyDialogDoc)));
return (CNotifyDialogDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CNotifyDialogView message handlers
void CNotifyDialogView::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
if(m_pCountDlg)
{
m_pCountDlg->m_dwCount++;
m_pCountDlg->ShowValue();
}
CScrollView::OnTimer(nIDEvent);
}
void CNotifyDialogView::OnCountDialog()
{
// TODO: Add your command handler code here
CCountDlg countDlg(this);
countDlg.DoModal();
}
int CNotifyDialogView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CScrollView::OnCreate(lpCreateStruct) == -1)
return -1;
// TODO: Add your specialized creation code here
SetTimer(1,100,NULL);
return 0;
}
void CNotifyDialogView::OnDestroy()
{
CScrollView::OnDestroy();
// TODO: Add your message handler code here
KillTimer(1);
}
#if !defined(AFX_COUNTDLG_H__C5A72F95_781F_47DC_95D1_A0E9A8473756__INCLUDED_)
#define AFX_COUNTDLG_H__C5A72F95_781F_47DC_95D1_A0E9A8473756__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// CountDlg.h : header file
//
#include "stdafx.h"
/////////////////////////////////////////////////////////////////////////////
// CCountDlg dialog
class CCountDlg : public CDialog
{
// Construction
public:
CCountDlg(CWnd* pParent = NULL); // standard constructor
// Dialog Data
//{{AFX_DATA(CCountDlg)
enum { IDD = IDD_DIALOG_COUNT };
DWORDm_dwCount;
//}}AFX_DATA
public:
CView *m_pView;
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CCountDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
public:
void ShowValue();
// Implementation
protected:
void ReleaseViewPointer();
// Generated message map functions
//{{AFX_MSG(CCountDlg)
afx_msg void OnDestroy();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_COUNTDLG_H__C5A72F95_781F_47DC_95D1_A0E9A8473756__INCLUDED_)
// CountDlg.cpp : implementation file
//
#include "stdafx.h"
#include "NotifyDialog.h"
#include "CountDlg.h"
#include "MainFrm.h"
#include "ChildFrm.h"
#include "NotifyDialogDoc.h"
#include "NotifyDialogView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CCountDlg dialog
CCountDlg::CCountDlg(CWnd* pParent /*=NULL*/)
: CDialog(CCountDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CCountDlg)
m_dwCount = 0;
//}}AFX_DATA_INIT
m_pView = (CNotifyDialogView*)pParent;
((CNotifyDialogView*)m_pView)->m_pCountDlg = this;
}
void CCountDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CCountDlg)
DDX_Text(pDX, IDC_EDIT_COUNT, m_dwCount);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CCountDlg, CDialog)
//{{AFX_MSG_MAP(CCountDlg)
ON_WM_DESTROY()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CCountDlg message handlers
void CCountDlg::ShowValue()
{
UpdateData(FALSE);
}
void CCountDlg::ReleaseViewPointer()
{
((CNotifyDialogView*)m_pView)->m_pCountDlg = NULL;
}
void CCountDlg::OnDestroy()
{
CDialog::OnDestroy();
// TODO: Add your message handler code here
ReleaseViewPointer();
}