在利用
VC
＋
MFC
編程的時候，我們往往能碰到這種情況：在一個模擬程序中（如有些游戲），需要實時顯示一些屬性的值（文字或者圖形），這個時候我們可以重新打開一個對話框（可以是一個模態或者非模態的）來顯示這些信息，本文以模態對話框為例，簡單實現這個技術。以下代碼陰影部分是我利用
ClassWizard
加的，藍色部分是我手工加的。其余是用
MFC
向導生成的：
源代碼下載地址：http://m.shnenglu.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();
}