C / C++ / MFC

Re: Bizzare problem reading large number of files

22-Apr-04 0:38

The OS does a caching for you
does it bother you?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Raul00722-Apr-04 18:17

Raul007

22-Apr-04 18:17

Thanks Papa for your reply.
I was not sure what was happening.
Now even if the OS is doing the caching part, I have 2 questions.
Will this happen in every OS. and further more some times it takes 1-2 secs to read files (total size 200 MB). that whats bothers me. 1/2 secs is really low, for reading and processing 200MB file wont you think!!
Anyway i am planing it run this component on a web sever. and a page will call this to show the results of this component.
thats why i am so worried about this thing..

Thanks a lot anyway...

Apratim

Clicking in Edit Box Creates Error..

AbinThomas22-Apr-04 0:22

AbinThomas

22-Apr-04 0:22

hi,
i created a simple editbox derived from CEdit class. its working , but clicking in the edit box sets out the devil.
The program shuts down after showing the message 'Debug Assertion Failed " Abort-Retry-Ignore.
Another problem is that i can't type characters more than the length of the editbox.
I wrote a message to handle the keypress event, using ON_EN_CHANGE(IDC_ED,OnEditKeyDown). but am not getting the 'enter' key.
the edit box is deleted in the killfocus event..
CAN ANYBODY HELP PLEASE ?

thanks in advance..
---------------- here goes the code-----------

-----edit box creation on pressing F4 key-----
case VK_F4:
{
CMainFrame* pMainWnd = (CMainFrame*) AfxGetMainWnd();
pEdit = new CEdit;

pEdit->Create(ES_AUTOVSCROLL | ES_WANTRETURN | WS_CHILD | WS_VISIBLE |WS_TABSTOP | WS_BORDER, CRect(0,col+(m_nCurSel*2),75,col+(m_nCurSel*2)+17), this,
IDC_ED);

pEdit->SetLimitText(50);
pEdit->SetFocus();
}
------ function that receives keypress---
void CMarketWatchView::OnEditKeyDown(UINT nChar)
{
static const MSG* pMsg = GetCurrentMessage();
if(pMsg->wParam==0x0D) //checkfor enter key
{
AfxMessageBox("Enter key");
- other code here-
}
pEdit->SetFocus();
}
---------lost focus function for the edit box ----
void CMarketWatchView::OnEditKillFocus()
{
char buf[50];
pEdit->GetWindowText(buf,49);

--other code here--
Invalidate(FALSE); //redraw
delete pEdit;
}

Re: Clicking in Edit Box Creates Error..

wb22-Apr-04 0:57

22-Apr-04 0:57

maybe you post the complete code here?

Re: Clicking in Edit Box Creates Error..

AbinThomas22-Apr-04 1:57

AbinThomas

22-Apr-04 1:57

b coz, i want the edit box to be dstroyed when it loses the focus.
the user can press F4 key again to create it.

it will b good if edit box disappears, when user hits Enter key.
thanks

this is the code

AbinThomas22-Apr-04 1:47

AbinThomas

22-Apr-04 1:47

-----edit box creation on pressing F4 key-----
case VK_F4:
{
CMainFrame* pMainWnd = (CMainFrame*) AfxGetMainWnd();
pEdit = new CEdit;
pEdit->Create(ES_AUTOVSCROLL | ES_WANTRETURN | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_BORDER,
CRect(0,col+(m_nCurSel*2),75,col+(m_nCurSel*2)+17), this, IDC_ED);
pEdit->SetLimitText(50);
pEdit->SetFocus();
}
------ function that receives keypress---
void CMarketWatchView::OnEditKeyDown(UINT nChar)
{
static const MSG* pMsg = GetCurrentMessage();
if(pMsg->wParam==0x0D) //checkfor enter key
{
AfxMessageBox("Enter key");
- other code here-
}
pEdit->SetFocus();
}
---------lost focus function for the edit box ----
void CMarketWatchView::OnEditKillFocus()
{
char buf[50];
pEdit->GetWindowText(buf,49);

--other code here--
Invalidate(FALSE); //redraw
delete pEdit;
}

jmkhael22-Apr-04 1:50

22-Apr-04 1:50

Why are you killing the edit in the OnEditKillFocus?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Steve S22-Apr-04 1:58

Steve S

22-Apr-04 1:58

I'd guess that they want to implement 'in-place' editing of text in a view, and clicking somewhere else is intended to complete/cancel the edit, collapsing the box.
Of course, that's only based on a glimpse of the code fragment, so I could be completely wrong Smile | :)

Steve S

jmkhael22-Apr-04 2:00

22-Apr-04 2:00

I meant why not hiding it?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

activeX Placement/Resizing

Steve S22-Apr-04 21:43

Steve S

22-Apr-04 21:43

OIC. That's a good question...

Steve S

Abhi Lahare22-Apr-04 0:06

Abhi Lahare

22-Apr-04 0:06

Hi all,

How to resize/place the activeX control in a container window, By default the
activeX control is resized to Full window size in which it is hosting how i can avoid that.

Thanks in Advance,
Abhishake

iostream.h/fstream.h???

roadragedave22-Apr-04 0:01

roadragedave

22-Apr-04 0:01

Why is iostream.h & fstream.h missing from VC++.NET include folders.
If I copy the same files from VC6.0 then I get errors in those files.
What can I do, where can I get those header files and if not what headers can I use instead of fstream.h

We have a mathematician, a different kind of mathematician, and a statistician!

Re: iostream.h/fstream.h???

toxcct22-Apr-04 0:19

Re: iostream.h/fstream.h???

22-Apr-04 0:19

try to include instead :
#include <iostream>
#include <fstream>

TOXCCT >>> GEII power

Paul Ranson22-Apr-04 0:22

Paul Ranson

22-Apr-04 0:22

"iostream.h" and "fstream.h" are not part of C++. Look at "iostream" and "fstream" and then the 'std::' scope.

#include <iostream>
#include <iomanip>
#include <fstream>

void SomeFuncToReadFile ( const char * sFile )
{
   std::ifstream in ( s ) ;
   if ( !in )
   {
      std::cerr << "Couldn't open input file : " << s << std::endl ;
      return ;
   }
   in.unsetf(std::ios::skipws) ;

   // do whatever with the file
}

Paul

Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

ohadp21-Apr-04 23:57

ohadp

21-Apr-04 23:57

I currently do:

_stscanf(string, L"%x", &number);

it doesn't seem like any of the atoi/l functions can handle hexa-decimal input,

any suggestions for something cleaner, or is as clean as it gets ? Smile | :)

Re: Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

toxcct22-Apr-04 0:13

Re: Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

22-Apr-04 0:13

do this :

<font style="color:blue;">char</font> str[2];            <font style="color:green;">// stored with your two characters</font>
<font style="color:blue;">unsigned char</font> ucConvertedNumber,
              MSB,              <font style="color:green;">// most significant bits</font>
              LSB;              <font style="color:green;">// less significant bits</font>

LSB = ((str[1] >= <font style="color:purple;">'0'</font>) && (str[1] <= <font style="color:purple;">'9'</font>)) ? str[1] - <font style="color:purple;">'0' </font>:
      ((str[1] >= <font style="color:purple;">'a'</font>) && (str[1] <= <font style="color:purple;">'f'</font>)) ? str[1] - <font style="color:purple;">'a' </font>+ 10 :
      ((str[1] >= <font style="color:purple;">'A'</font>) && (str[1] <= <font style="color:purple;">'F'</font>)) ? str[1] - <font style="color:purple;">'A' </font>+ 10 : -1; <font style="color:green;">// this happens only if your string is not a correct hexa representation</font>
<font style="color:green;">// do some error checking here...</font>
 
MSB = ((str[0] >= <font style="color:purple;">'0'</font>) && (str[0] <= <font style="color:purple;">'9'</font>)) ? str[0] - <font style="color:purple;">'0' </font>:
      ((str[0] >= <font style="color:purple;">'a'</font>) && (str[0] <= <font style="color:purple;">'f'</font>)) ? str[0] - <font style="color:purple;">'a' </font>+ 10 :
      ((str[0] >= <font style="color:purple;">'A'</font>) && (str[0] <= <font style="color:purple;">'F'</font>)) ? str[0] - <font style="color:purple;">'A' </font>+ 10 : -1; <font style="color:green;">// this happens only if your string is not a correct hexa representation</font>
<font style="color:green;">// do some error checking here...</font>
 
MSB = MSB << 4;
 
ucConvertedNumber = MSB | LSB;

you've got it...

you can nox do :

printf(<font style="color:purple;">"Decimal form     :%d\n"
       "Hexadecimal form :%x\n"</font>,
       ucConvertedNumber,
       ucConvertedNumber);

TOXCCT >>> GEII power

jmkhael22-Apr-04 0:30

Re: Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

22-Apr-04 0:30

long strtol( const char *nptr, char **endptr, int base );

acString

strtol(acString, NULL, 16);

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

ohadp22-Apr-04 0:42

ohadp

22-Apr-04 0:42

this is the function i was looking for Smile | :)

Re: Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

toxcct22-Apr-04 1:02

Re: Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

22-Apr-04 1:02

ok for a function, but understand what it does because it isn't a standard function...

TOXCCT >>> GEII power

Prakash Nadar22-Apr-04 1:05

Prakash Nadar

22-Apr-04 1:05

Nice joke.

God is Real, unless declared Integer.

Re: Cleanest way to convert a two character string like "4D" to it's hex-equivalent-number ?

toxcct22-Apr-04 1:39