RichEdit

开发平台：
Visual C++

EdStreamDlg.cpp：源码内容
							// EdStreamDlg.cpp : implementation file
//
#include "stdafx.h"
#include "EdStream.h"
#include "EdStreamDlg.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
	// 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
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CEdStreamDlg dialog
CEdStreamDlg::CEdStreamDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEdStreamDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CEdStreamDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CEdStreamDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEdStreamDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CEdStreamDlg, CDialog)
	//{{AFX_MSG_MAP(CEdStreamDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CEdStreamDlg message handlers
BOOL CEdStreamDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	// 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
	
	//SAMPLE: disable the OK button by default
	CWnd* pButton = GetDlgItem(IDOK);
	ASSERT(pButton != NULL);
	pButton->EnableWindow(FALSE);
	return TRUE;  // return TRUE  unless you set the focus to a control
}
void CEdStreamDlg::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.
void CEdStreamDlg::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();
	}
}
// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CEdStreamDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
DWORD CALLBACK MyStreamingCallback(DWORD dwCookie,
  LPBYTE pbBuff, LONG cb, LONG *pcb)
{
	CFile* pFile = (CFile*) dwCookie;
	ASSERT_KINDOF(CFile, pFile);
	*pcb = pFile->Read(pbBuff, cb);
	return 0;
//	return !(*pcb > 0);
}
void CEdStreamDlg::OnOK() 
{
	CRichEditCtrl* pCtrl = (CRichEditCtrl*) GetDlgItem(IDC_RICHEDIT1);
	ASSERT(pCtrl != NULL);
	//SAMPLE: get user-provided file name
	CString str;
	GetDlgItemText(IDC_EDIT1, str);
	CFile* pInputFile = NULL;
	try
	{
		pInputFile = new CFile(str, CFile::modeRead | CFile::shareDenyNone);
		EDITSTREAM strm;
		strm.dwCookie = (DWORD) pInputFile;
		strm.pfnCallback = MyStreamingCallback;
		long lResult = pCtrl->StreamIn(SF_TEXT, strm);
		pInputFile->Close();
	}
	catch (CFileException* pEx)
	{
		pEx->Delete();
	}
	delete pInputFile;
}
void CEdStreamDlg::OnChangeEdit1() 
{
	CWnd* pCtrl = GetDlgItem(IDC_EDIT1);
	ASSERT(pCtrl != NULL);
	CWnd* pButton = GetDlgItem(IDOK);
	ASSERT(pButton != NULL);
	//SAMPLE: if there's text there, allow the user
	// to have the "Load" button
	int n = pCtrl->GetWindowTextLength();
	pButton->EnableWindow(n != 0);
}

						