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To access the contents, click the chapter and section titles.
Fast Track Visual C++ 6.0 Programming
The Application ObjectThe application objects job is to start and initialize the program and then show the main window. This objects class is CKeysSDIAapp, and in that classs InitInstance() function, we see how the program connects the other three classesthe document, main frame window, and view classesto the program using a document template (well make use of document templates throughout the book). BOOL CKeysSDIApp::InitInstance() { . . . CSingleDocTemplate* pDocTemplate; pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS(CKeysSDIDoc), ⇐ RUNTIME_CLASS(CMainFrame), // main SDI frame window ⇐ RUNTIME_CLASS(CKeysSDIView)); ⇐ AddDocTemplate(pDocTemplate); . . . Now that the other classes are set up, the program shows the main window this way in InitInstance(): BOOL CKeysSDIApp::InitInstance() { . . . CSingleDocTemplate* pDocTemplate; pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS(CKeysSDIDoc), RUNTIME_CLASS(CMainFrame), // main SDI frame window RUNTIME_CLASS(CKeysSDIView)); AddDocTemplate(pDocTemplate); . . . // The one and only window has been initialized, so show and update it. m_pMainWnd->ShowWindow(SW_SHOW); ⇐ m_pMainWnd->UpdateWindow(); ⇐ return TRUE; } The program has been set up and the main frame window displayed. Well take a look at the main frame window class next. The code for KeysSDI.h and KeysSDI.cpp appears in Listing 1.2. Listing 1.2 KeysSDI.h and KeysSDI.cpp // KeysSDI.h : main header file for the KEYSSDI application // #if !defined(AFX_KEYSSDI_H__701B1AD5_9BB7_11D1_887F_D42B07C10710__INCLUDED_) #define AFX_KEYSSDI_H__701B1AD5_9BB7_11D1_887F_D42B07C10710__INCLUDED_ #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 #ifndef __AFXWIN_H__ #error include stdafx.h before including this file for PCH #endif #include resource.h // main symbols ///////////////////////////////////////////////////////////////////////////// // CKeysSDIApp: // See KeysSDI.cpp for the implementation of this class // class CKeysSDIApp : public CWinApp { public: CKeysSDIApp(); // Overrides // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CKeysSDIApp) public: virtual BOOL InitInstance(); //}}AFX_VIRTUAL // Implementation //{{AFX_MSG(CKeysSDIApp) afx_msg void OnAppAbout(); // NOTE - the ClassWizard will add and remove member functions here. // DO NOT EDIT what you see in these blocks of generated code ! //}}AFX_MSG DECLARE_MESSAGE_MAP() }; ///////////////////////////////////////////////////////////////////////////// //{{AFX_INSERT_LOCATION}} // Microsoft Visual C++ will insert additional declarations immediately before the previous line. #endif // !defined(AFX_KEYSSDI_H__701B1AD5_9BB7_11D1_887F_D42B07C10710__INCLUDED_) // KeysSDI.cpp : Defines the class behaviors for the application. // #include stdafx.h #include KeysSDI.h #include MainFrm.h #include KeysSDIDoc.h #include KeysSDIView.h #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CKeysSDIApp BEGIN_MESSAGE_MAP(CKeysSDIApp, CWinApp) //{{AFX_MSG_MAP(CKeysSDIApp) ON_COMMAND(ID_APP_ABOUT, OnAppAbout) // NOTE - the ClassWizard will add and remove mapping macros here. // DO NOT EDIT what you see in these blocks of generated code! //}}AFX_MSG_MAP // Standard file based document commands ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew) ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen) // Standard print setup command ON_COMMAND(ID_FILE_PRINT_SETUP, CWinApp::OnFilePrintSetup) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CKeysSDIApp construction CKeysSDIApp::CKeysSDIApp() { // TODO: add construction code here, // Place all significant initialization in InitInstance } ///////////////////////////////////////////////////////////////////////////// // The one and only CKeysSDIApp object CKeysSDIApp theApp; ///////////////////////////////////////////////////////////////////////////// // CKeysSDIApp initialization BOOL CKeysSDIApp::InitInstance() { AfxEnableControlContainer(); // Standard initialization // If you are not using these features and wish to reduce the size // of your final executable, you should remove from the following // the specific initialization routines you do not need. #ifdef _AFXDLL Enable3dControls(); // Call this when using MFC in a shared DLL #else Enable3dControlsStatic(); // Call this when linking to MFC statically #endif // Change the registry key under which our settings are stored. // You should modify this string to be something appropriate // such as the name of your company or organization. SetRegistryKey(_T(Local AppWizard-Generated Applications)); LoadStdProfileSettings(); // Load standard INI file options (including MRU) // Register the applications document templates. Document templates // serve as the connection between documents, frame windows and views. CSingleDocTemplate* pDocTemplate; pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS(CKeysSDIDoc), RUNTIME_CLASS(CMainFrame), // main SDI frame window RUNTIME_CLASS(CKeysSDIView)); AddDocTemplate(pDocTemplate); // Parse command line for standard shell commands, DDE, file open CCommandLineInfo cmdInfo; ParseCommandLine(cmdInfo); // Dispatch commands specified on the command line if (!ProcessShellCommand(cmdInfo)) return FALSE; // The one and only window has been initialized, so show and update it. m_pMainWnd->ShowWindow(SW_SHOW); m_pMainWnd->UpdateWindow(); return TRUE; } ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) // No message handlers //}}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 } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() // App command to run the dialog void CKeysSDIApp::OnAppAbout() { CAboutDlg aboutDlg; aboutDlg.DoModal(); } ///////////////////////////////////////////////////////////////////////////// // CKeysSDIApp commands The main window has been displayed on the screen, and well take a look at that window next.
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