www.pudn.com > 10-11cha.rar > TipDlg.cpp

#include "stdafx.h"
#include "resource.h"
// CG: This file added by 'Tip of the Day' component. 
 
#include  
#include  
#include  
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CTipDlg dialog 
 
#define MAX_BUFLEN 1000 
 
static const TCHAR szSection[] = _T("Tip"); 
static const TCHAR szIntFilePos[] = _T("FilePos"); 
static const TCHAR szTimeStamp[] = _T("TimeStamp"); 
static const TCHAR szIntStartup[] = _T("StartUp"); 
 
CTipDlg::CTipDlg(CWnd* pParent /*=NULL*/) 
	: CDialog(IDD_TIP, pParent) 
{ 
	//{{AFX_DATA_INIT(CTipDlg) 
	m_bStartup = TRUE; 
	//}}AFX_DATA_INIT 
 
	// We need to find out what the startup and file position parameters are 
	// If startup does not exist, we assume that the Tips on startup is checked TRUE. 
	CWinApp* pApp = AfxGetApp(); 
	m_bStartup = !pApp->GetProfileInt(szSection, szIntStartup, 0); 
	UINT iFilePos = pApp->GetProfileInt(szSection, szIntFilePos, 0); 
 
	// Now try to open the tips file 
	m_pStream = fopen("tips.txt", "r"); 
	if (m_pStream == NULL)  
	{ 
		m_strTip.LoadString(CG_IDS_FILE_ABSENT); 
		return; 
	}  
 
	// If the timestamp in the INI file is different from the timestamp of 
	// the tips file, then we know that the tips file has been modified 
	// Reset the file position to 0 and write the latest timestamp to the 
	// ini file 
	struct _stat buf; 
	_fstat(_fileno(m_pStream), &buf); 
	CString strCurrentTime = ctime(&buf.st_ctime); 
	strCurrentTime.TrimRight(); 
	CString strStoredTime =  
		pApp->GetProfileString(szSection, szTimeStamp, NULL); 
	if (strCurrentTime != strStoredTime)  
	{ 
		iFilePos = 0; 
		pApp->WriteProfileString(szSection, szTimeStamp, strCurrentTime); 
	} 
 
	if (fseek(m_pStream, iFilePos, SEEK_SET) != 0)  
	{ 
		AfxMessageBox(CG_IDP_FILE_CORRUPT); 
	} 
	else  
	{ 
		GetNextTipString(m_strTip); 
	} 
} 
 
CTipDlg::~CTipDlg() 
{ 
	// This destructor is executed whether the user had pressed the escape key 
	// or clicked on the close button. If the user had pressed the escape key, 
	// it is still required to update the filepos in the ini file with the  
	// latest position so that we don't repeat the tips!  
     
	// But make sure the tips file existed in the first place.... 
	if (m_pStream != NULL)  
	{ 
		CWinApp* pApp = AfxGetApp(); 
		pApp->WriteProfileInt(szSection, szIntFilePos, ftell(m_pStream)); 
		fclose(m_pStream); 
	} 
} 
         
void CTipDlg::DoDataExchange(CDataExchange* pDX) 
{ 
	CDialog::DoDataExchange(pDX); 
	//{{AFX_DATA_MAP(CTipDlg) 
	DDX_Check(pDX, IDC_STARTUP, m_bStartup); 
	DDX_Text(pDX, IDC_TIPSTRING, m_strTip); 
	//}}AFX_DATA_MAP 
} 
 
BEGIN_MESSAGE_MAP(CTipDlg, CDialog) 
	//{{AFX_MSG_MAP(CTipDlg) 
	ON_BN_CLICKED(IDC_NEXTTIP, OnNextTip) 
	ON_WM_CTLCOLOR() 
	ON_WM_PAINT() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CTipDlg message handlers 
 
void CTipDlg::OnNextTip() 
{ 
	GetNextTipString(m_strTip); 
	UpdateData(FALSE); 
} 
 
void CTipDlg::GetNextTipString(CString& strNext) 
{ 
	LPTSTR lpsz = strNext.GetBuffer(MAX_BUFLEN); 
 
	// This routine identifies the next string that needs to be 
	// read from the tips file 
	BOOL bStop = FALSE; 
	while (!bStop)  
	{ 
		if (_fgetts(lpsz, MAX_BUFLEN, m_pStream) == NULL)  
		{ 
			// We have either reached EOF or enocuntered some problem 
			// In both cases reset the pointer to the beginning of the file 
			// This behavior is same as VC++ Tips file 
			if (fseek(m_pStream, 0, SEEK_SET) != 0)  
				AfxMessageBox(CG_IDP_FILE_CORRUPT); 
		}  
		else  
		{ 
			if (*lpsz != ' ' && *lpsz != '\t' &&  
				*lpsz != '\n' && *lpsz != ';')  
			{ 
				// There should be no space at the beginning of the tip 
				// This behavior is same as VC++ Tips file 
				// Comment lines are ignored and they start with a semicolon 
				bStop = TRUE; 
			} 
		} 
	} 
	strNext.ReleaseBuffer(); 
} 
 
HBRUSH CTipDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{ 
	if (pWnd->GetDlgCtrlID() == IDC_TIPSTRING) 
		return (HBRUSH)GetStockObject(WHITE_BRUSH); 
 
	return CDialog::OnCtlColor(pDC, pWnd, nCtlColor); 
} 
 
void CTipDlg::OnOK() 
{ 
	CDialog::OnOK(); 
	 
    // Update the startup information stored in the INI file 
	CWinApp* pApp = AfxGetApp(); 
	pApp->WriteProfileInt(szSection, szIntStartup, !m_bStartup); 
} 
 
BOOL CTipDlg::OnInitDialog() 
{ 
	CDialog::OnInitDialog(); 
 
	// If Tips file does not exist then disable NextTip 
	if (m_pStream == NULL) 
		GetDlgItem(IDC_NEXTTIP)->EnableWindow(FALSE); 
 
	return TRUE;  // return TRUE unless you set the focus to a control 
} 
 
void CTipDlg::OnPaint() 
{ 
	CPaintDC dc(this); // device context for painting 
 
	// Get paint area for the big static control 
	CWnd* pStatic = GetDlgItem(IDC_BULB); 
	CRect rect; 
	pStatic->GetWindowRect(&rect); 
	ScreenToClient(&rect); 
 
	// Paint the background white. 
	CBrush brush; 
	brush.CreateStockObject(WHITE_BRUSH); 
	dc.FillRect(rect, &brush); 
 
	// Load bitmap and get dimensions of the bitmap 
	CBitmap bmp; 
	bmp.LoadBitmap(IDB_LIGHTBULB); 
	BITMAP bmpInfo; 
	bmp.GetBitmap(&bmpInfo); 
 
	// Draw bitmap in top corner and validate only top portion of window 
	CDC dcTmp; 
	dcTmp.CreateCompatibleDC(&dc); 
	dcTmp.SelectObject(&bmp); 
	rect.bottom = bmpInfo.bmHeight + rect.top; 
	dc.BitBlt(rect.left, rect.top, rect.Width(), rect.Height(),  
		&dcTmp, 0, 0, SRCCOPY); 
 
	// Draw out "Did you know..." message next to the bitmap 
	CString strMessage; 
	strMessage.LoadString(CG_IDS_DIDYOUKNOW); 
	rect.left += bmpInfo.bmWidth; 
	dc.DrawText(strMessage, rect, DT_VCENTER | DT_SINGLELINE); 
 
	// Do not call CDialog::OnPaint() for painting messages 
}