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VC中視圖(View)通知對話框(Dialog)的方法

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://www.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();

}

posted on 2006-04-28 21:47 史傳紅閱讀(3878) 評論(2) 編輯收藏引用所屬分類: C/C++細節知識

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# re: VC中視圖(View)通知對話框(Dialog)的方法 2006-04-28 23:11 flyingxu

其實可以用簡潔的語言代替所有的代碼
而且，如果真的想在一個對話框中顯示實時的值，現在的程序結構上不好。回復更多評論

# re: VC中視圖(View)通知對話框(Dialog)的方法 2006-04-29 20:15 史傳紅

@flyingxu

由于我以前遇到這個問題沒有解決，現在看了深入淺出MFC這本書，總結出來的，你能給出一個好的結構嗎？我的意思是說把文檔的數據在一個對話框中實時表現出來，謝謝。
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