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Visual C++ Windows Programming

Visual C++ Windows Programming. 第十章 Modaless 對話盒. 大綱. Modaless 對話盒的設計 對話盒應用程式的使用. Modaless 對話盒的設計. Modaless 對話盒的使用方式 相較於 modal 對話盒而言， modaless 對話盒較為複雜。要建立一個 modaless 對話盒我們必須呼叫 CDialog 的預設建構式建構對話盒物件，然後呼叫 CDialog::Create 函式產生對話盒視窗，而非 DoModal 函式。

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Visual C++ Windows Programming

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  1. Visual C++ Windows Programming 第十章 Modaless 對話盒

  2. 大綱 • Modaless 對話盒的設計 • 對話盒應用程式的使用

  3. Modaless 對話盒的設計 • Modaless 對話盒的使用方式 • 相較於 modal 對話盒而言， modaless 對話盒較為複雜。要建立一個 modaless 對話盒我們必須呼叫 CDialog 的預設建構式建構對話盒物件，然後呼叫 CDialog::Create 函式產生對話盒視窗，而非 DoModal 函式。 • 對於一個 modaless 對話盒，你必須確切地掌握：何時建構對話盒物件？何時產生對話盒視窗？何時摧毀對話盒？何時處理使用者的輸入資料？

  4. Modaless 對話盒的設計 (續) • 使用者自訂訊息 • 傳送 Windows 訊息的方式有 CWnd::SendMessage 函式或者 CWnd::PostMessage 兩種。SendMessage 會立刻呼叫訊息處理函式，而 PostMessage 函式只會把訊息放在 Windows 的 Message Queue 中。因此大多數的狀況，我們要送出使用者訊息的時候，採用 PostMessage 函式。

  5. 對話盒應用程式的使用 • Doc/View 的迷思 • 建立一個 Doc/View 架構的應用程式是相當大的工程，但它的確為我們解決了不少資料處理的問題。 • 對於一般並不處理資料儲存的應用程式而言，使用 Doc/View 架構顯然小題大作，因此我們只需要將這類應用程式建立成對話盒應用程式就可以了。 • 一般而言，對話盒應用程式相較於 Doc/View 架構的視窗應用程式，通常是比較小的程式，例如 CD 播放程式， FTP Client 等等。兩者的差別在於對話盒應用程式是獨立的一個程式，一般的對話盒通常只是某一個程式的一部分，僅在被呼叫時，才被產生。

  6. http://cobra.ee.ntu.edu.tw/~bypeng/VC2003-3/programs/numres.ziphttp://cobra.ee.ntu.edu.tw/~bypeng/VC2003-3/programs/numres.zip

  7. *Dlg.cpp // exam10Dlg.cpp : implementation file // #include "stdafx.h" #include "exam10.h" #include "exam10Dlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA

  8. *Dlg.cpp (續) // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP }

  9. *Dlg.cpp (續) BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CExam10Dlg dialog CExam10Dlg::CExam10Dlg(CWnd* pParent /*=NULL*/) : CDialog(CExam10Dlg::IDD, pParent) { //{{AFX_DATA_INIT(CExam10Dlg) //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CExam10Dlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CExam10Dlg) DDX_Control(pDX, IDC_S2, m_second2); DDX_Control(pDX, IDC_S1, m_second1); DDX_Control(pDX, IDC_M2, m_minute2);

  10. *Dlg.cpp (續) DDX_Control(pDX, IDC_M1, m_minute1); DDX_Control(pDX, IDC_H2, m_hour2); DDX_Control(pDX, IDC_H1, m_hour1); DDX_Control(pDX, IDC_COLON2, m_colon2); DDX_Control(pDX, IDC_COLON1, m_colon1); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CExam10Dlg, CDialog) //{{AFX_MSG_MAP(CExam10Dlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_WM_TIMER() ON_WM_DESTROY() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CExam10Dlg message handlers BOOL CExam10Dlg::OnInitDialog() { CDialog::OnInitDialog();

  11. *Dlg.cpp (續) // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range. ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon // TODO: Add extra initialization here

  12. *Dlg.cpp (續) if(!SetTimer(IDC_TIMER, 1000, NULL)) { MessageBox("Timer Setup Failure."); DestroyWindow(); } return TRUE; // return TRUE unless you set the focus to a control } void CExam10Dlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework.

  13. *Dlg.cpp (續) void CExam10Dlg::OnPaint() { if (IsIconic()) { CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon dc.DrawIcon(x, y, m_hIcon); } else { CDialog::OnPaint(); } }

  14. *Dlg.cpp (續) // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CExam10Dlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CExam10Dlg::OnTimer(UINT nIDEvent) { // TODO: Add your message handler code here and/or call default CTime Current = CTime::GetCurrentTime(); long hour, minute, second; hour = Current.GetHour(); minute = Current.GetMinute(); second = Current.GetSecond(); m_hour1.SetIcon(AfxGetApp()->LoadIcon(IDI_NUM0 + hour / 10)); m_hour2.SetIcon(AfxGetApp()->LoadIcon(IDI_NUM0 + hour % 10)); m_colon1.SetIcon(AfxGetApp()->LoadIcon(IDI_COLON)); m_minute1.SetIcon(AfxGetApp()->LoadIcon(IDI_NUM0 + minute / 10)); m_minute2.SetIcon(AfxGetApp()->LoadIcon(IDI_NUM0 + minute % 10)); m_colon2.SetIcon(AfxGetApp()->LoadIcon(IDI_COLON)); m_second1.SetIcon(AfxGetApp()->LoadIcon(IDI_NUM0 + second / 10)); m_second2.SetIcon(AfxGetApp()->LoadIcon(IDI_NUM0 + second % 10));

  15. *Dlg.cpp (續) CDialog::OnTimer(nIDEvent); } void CExam10Dlg::OnDestroy() { CDialog::OnDestroy(); // TODO: Add your message handler code here KillTimer(IDC_TIMER); }

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