closedoc.cpp

< MFC经典问答>>是微软类库经常遇到的问题

// CloseDoc.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "CloseDoc.h"

#include "MainFrm.h"
#include "ChildFrm.h"

#include "DrawDoc.h"
#include "DrawView.h"

#include "CountDoc.h"
#include "CountView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMDIApp

BEGIN_MESSAGE_MAP(CMDIApp, CWinApp)
	//{{AFX_MSG_MAP(CMDIApp)
	ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
	ON_COMMAND(ID_CLOSE_DOC_1, OnCloseDoc1)
	ON_COMMAND(ID_CLOSE_DOC_2, OnCloseDoc2)
	ON_COMMAND(ID_CLOSE_DOC_3, OnCloseDoc3)
	ON_UPDATE_COMMAND_UI(ID_CLOSE_DOC_1, OnUpdateCloseDoc)
	ON_UPDATE_COMMAND_UI(ID_CLOSE_DOC_2, OnUpdateCloseDoc)
	ON_UPDATE_COMMAND_UI(ID_CLOSE_DOC_3, OnUpdateCloseDoc)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CMDIApp construction

CMDIApp::CMDIApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CMDIApp object

CMDIApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CMDIApp initialization

BOOL CMDIApp::InitInstance()
{
	// 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

	LoadStdProfileSettings();  // Load standard INI file options (including MRU)

	// Register the application's document templates.  Document templates
	//  serve as the connection between documents, frame windows and views.

	// 'Drawing' document template
	CMultiDocTemplate* pDocTemplate;
	pDocTemplate = new CMultiDocTemplate(
		IDR_DRAWTYPE,
		RUNTIME_CLASS(CDrawDoc),
		RUNTIME_CLASS(CChildFrame), // custom MDI child frame
		RUNTIME_CLASS(CDrawView));
	AddDocTemplate(pDocTemplate);

	// 'Counter' document template
	pDocTemplate = new CMultiDocTemplate(
		IDR_COUNTTYPE,
		RUNTIME_CLASS(CCountDoc),
		RUNTIME_CLASS(CChildFrame), // custom MDI child frame
		RUNTIME_CLASS(CCountView));
	AddDocTemplate(pDocTemplate);

	// create main MDI Frame window
	CMainFrame* pMainFrame = new CMainFrame;
	if (!pMainFrame->LoadFrame(IDR_MAINFRAME))
		return FALSE;
	m_pMainWnd = pMainFrame;

	// Enable drag/drop open
	m_pMainWnd->DragAcceptFiles();

	// Enable DDE Execute open
	EnableShellOpen();
	RegisterShellFileTypes(TRUE);

	// Parse command line for standard shell commands, DDE, file open
	CCommandLineInfo cmdInfo;

	// Turn off default OnFileNew() call
	cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;

	ParseCommandLine(cmdInfo);

	// Dispatch commands specified on the command line
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// The main window has been initialized, so show and update it.
	pMainFrame->ShowWindow(m_nCmdShow);
	pMainFrame->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 CMDIApp::OnAppAbout()
{
	CAboutDlg aboutDlg;
	aboutDlg.DoModal();
}

///////////////////////////////////////////////////////////
// Return a pointer to the active document object or NULL

CDocument* EkGetActiveDocument()
{
	// 1 - Get a pointer to the application's
	// main frame window
	CWnd* pWnd = AfxGetMainWnd();
	if( pWnd == NULL )
		return NULL;

	// 2 - Make sure the pointer is valid and more
	// strongly typed
	ASSERT_VALID( pWnd );
	ASSERT_KINDOF( CFrameWnd, pWnd );
	CFrameWnd* pMainFrame = static_cast< CFrameWnd* >( pWnd );

	// 3 - Get a pointer to the active frame window
	// (may be 'this' for SDI application)
	CFrameWnd* pActiveFrame = pMainFrame->GetActiveFrame();
	if( pActiveFrame == NULL )
		return NULL;

	// 4 - Return a pointer to the active document object
	return pActiveFrame->GetActiveDocument();
}

///////////////////////////////////////////////////////////
// Close a document object

void EkCloseDocument( CDocument* pDoc )
{
	ASSERT_VALID( pDoc );

	// 1 - Give the user a chance to save his document
	if( !pDoc->SaveModified() )
		return;

	// 2 - Destroy the document object
	pDoc->OnCloseDocument();
}

/////////////////////////////////////////////////////////////////////////////
// CMDIApp commands

void CMDIApp::OnCloseDoc1() 
{
	AfxGetMainWnd()->PostMessage( WM_COMMAND, ID_FILE_CLOSE );	
}

void CMDIApp::OnCloseDoc2() 
{
	CDocument* pDoc = EkGetActiveDocument();

	// Destroy the document (and close its views)
	// WITHOUT saving the document even if modified !
	if( pDoc != NULL )
		pDoc->OnCloseDocument();	
}

void CMDIApp::OnCloseDoc3() 
{
	CDocument* pDoc = EkGetActiveDocument();

	if( pDoc == NULL )
		return;

	EkCloseDocument( pDoc );
}

void CMDIApp::OnUpdateCloseDoc(CCmdUI* pCmdUI) 
{
	CDocument* pDoc = EkGetActiveDocument();
	pCmdUI->Enable( pDoc != NULL );
}