C / C++ / MFC Discussion Boards

rallister22-Apr-04 1:18

22-Apr-04 1:18

Hi,
i'm not using mfc in my application ;o) !
So please provide a solution without mfc !
Thx in advance and best regards
Richard

Re: How do i detect user inactivity ?

jmkhael22-Apr-04 1:48

jmkhael

22-Apr-04 1:48

From MSDN about OnIdle

OnIdle is called in the default message loop when the application’s message queue is empty. Use your override to call your own background idle-handler tasks.

Why not do the "same" in your main loop?
When no messages are being treated treat Call an OnYourIdle Function

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: How do i detect user inactivity ?

David Crow22-Apr-04 2:19

David Crow

22-Apr-04 2:19

Check out GetLastInputInfo().

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: How do i detect user inactivity ?

hasansheik22-Apr-04 3:21

hasansheik

22-Apr-04 3:21

If you are using MFC based application u can track it by overriding OnIdle method of CWinApp class.
for direct win32 application u can use WinProc method to track any message is posted on the message queue of the application.

One Best method is, Through Hook. write a WH_MESSAGE hook and do your work fine

I hope it will help you

thanks

Re: How do i detect user inactivity ?

V.22-Apr-04 3:28

22-Apr-04 3:28

Maybe one note on the onidle loop.
It will use a lot of cpu % usage!
You can solve this by setting a start time in your onidle (and then tell it to stop working) and starting a thread which will test this starttime against the currenttime. if a certain time has passed ... (take some action).
Put a Sleep in your thread to keep the cpu % usage down.

Have fun ...

Re: How do i detect user inactivity ?

peterchen22-Apr-04 4:25

peterchen

22-Apr-04 4:25

As already suggested, GetLastUserInputInfo() on W2K+ systems.
Otherwise you could modify the main message loop, and take the time stamps of hincoming mouse/keyboard messages.
Another option would be a Mouse/Keyboard hook inside your process, that simply resets a timer. This seems the most independent solution (and not too complicated), but personally I would avoid a hook unless it's the only way.

or you just check if the space key is permanently down, and there are snoring noises from the MIC IN. Wink | ;)

Flirt harder, I'm a Coder

mlog || Agile Programming | doxygen

Re: How do i detect user inactivity ?

Rick York22-Apr-04 10:12

Rick York

22-Apr-04 10:12

This article demonstrates one method : http://www.codeproject.com/dll/trackuseridle.asp[^]

__________________________________________
a two cent stamp short of going postal.

Shell question (I Guess)

Deian22-Apr-04 0:47

Deian

22-Apr-04 0:47

I want to be able to display properties for file or folder, as we do when right-clicking over file or folder, I have to display this shell dialog (shell dialog I Guess), but my search in msdn and here at CP does not give any results. Does anyone know how to do that or have information link?

Thanks in Advance!

Re: Shell question (I Guess)

_Magnus_22-Apr-04 1:00

_Magnus_

22-Apr-04 1:00

Try ShellExecute with the verb "Properties"

/Magnus

- I don't necessarily agree with everything I say

Re: Shell question (I Guess)

Deian27-Apr-04 4:07

Deian

27-Apr-04 4:07

Doesent seem to work Frown | :(

Bizzare problem reading large number of files

Raul00722-Apr-04 0:34

Raul007

22-Apr-04 0:34

Following is the code snippet i am working with.
miNumDataFile denotes number of datafiles
msarrDataFile[iloop] denotes the file path and name.

I am opening around 3000 fines in binary mode and
reading all the records in each file using fread. total file size
around 187mb with 1366218 rows.
its a simple c exe.

on the first run it takes 48 secs.
on the seond run it takes 2 secs!!!!!!!!!.

my question is why is happening. each time i reboot my pc
the same phenomenon happens. WHY??????

for(int iloop=0;iloop

Re: Bizzare problem reading large number of files

jmkhael22-Apr-04 0:38

jmkhael

22-Apr-04 0:38

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

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: Bizzare problem reading large number of files

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;
}

Re: this is the code

jmkhael22-Apr-04 1:50

jmkhael

22-Apr-04 1:50

Why are you killing the edit in the OnEditKillFocus?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: this is the code

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

Re: this is the code

jmkhael22-Apr-04 2:00

jmkhael

22-Apr-04 2:00

I meant why not hiding it?

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: this is the code

Steve S22-Apr-04 21:43

Steve S

22-Apr-04 21:43

OIC. That's a good question...

Steve S

activeX Placement/Resizing

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

toxcct

22-Apr-04 0:19

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

TOXCCT >>> GEII power

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

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

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