tipdlg.cpp

#include "stdafx.h"
#include "pex32.h"
#include "TipDlg.h"

// CG: This file added by 'Tip of the Day' component.

#include <winreg.h>
#include <sys\stat.h>
#include <sys\types.h>

#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

  if ((GetUserDefaultLCID () & 0xff) != 0x07)
    m_pStream = fopen ("tipseng.txt", "r");
  else
    m_pStream = fopen ("tipsde.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
}