Re: Is it even possible to create a multiline CListCtrl in report mode? - C / C++ / MFC Discussion Boards

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Re: Constructors and (...)

Sprudling2-Oct-01 12:58

Sprudling

2-Oct-01 12:58

Uhm... I don't really understand what you mean.

I know I can't actually write 'ObArray::ObArray(int initLen, ...)'. I just meant that this constructor could take arguments like that, and pass them on...

Btw... I think I found some sort of solution by using copy constructors, but that requires that the class I want to create the array of has one.

Another solution not requiring that will be better.

Sprudling

Re: Constructors and (...)

Tomasz Sowinski2-Oct-01 23:36

Tomasz Sowinski

2-Oct-01 23:36

I mean that you should allocate raw memory for all objects first using ::operator new or malloc. Constructors are not called in this phase. You use placement new next to initialize objects in allocated memory. The only problem left is that different classes you're going to put into ObArray may need different number of constructor parameters - you can solve this by providing multiple ObArray constructors, each having different number of params. Assuming that there are max 3 parameters that you need to pass, declaration of ObArray should begin like this:

template <typename T, 
typename P1 = void, 
typename P2 = void,
typename P3 = void>
class ObArray
{
// four constructors should go here
// one accepting only number of objects and no params
// and one for 1,2,3 params
};

Of course, you can generalize this to use more than 3 parameters in the c'tor.

Tomasz Sowinski -- http://www.shooltz.com

Convert Integer to LPSTR

2-Oct-01 11:14

Hi...

How can I convert an Integer to LPSTR

here is what I want:
TextOut(hdc, 20, 20, Integer, 5); Smile | :)

Re: Convert Integer to LPSTR

Carlos Antollini2-Oct-01 11:41

Carlos Antollini

2-Oct-01 11:41

With itoa(nVal, buff, 10);

Where buff is a LPSTR and nVal is a Integer.

Cheers!!!!

Carlos Antollini.

Thank you!

2-Oct-01 11:59

Thank you!

Is it even possible to create a multiline CListCtrl in report mode?

DanYELL2-Oct-01 11:11

DanYELL

2-Oct-01 11:11

I looked everywhere and tried alot of different things, but I can't
find any code that will help me create a multiline CListCtrl in
report mode. Any ideas? Any suggetsions? Any code?

Any response any one can give me will be greatly appreciated.

Sincerely,
Danielle (an overworked graduate student)

Re: Is it even possible to create a multiline CListCtrl in report mode?

Bret Faller2-Oct-01 13:20

Bret Faller

2-Oct-01 13:20

Its possible.

http://www.codeguru.com/listview/ReportCtrl.shtml

Bret Faller
Odyssey Computing, Inc.

Re: Is it even possible to create a multiline CListCtrl in report mode?

DanYELL3-Oct-01 3:29

DanYELL

3-Oct-01 3:29

I sincerely appreciate the reply.

I looked at that demo project and its spectacular, but really different
understand. By chance, do you have a smaller project that isolates the multiple text for one item feature? Or could you help me create it?

I have a CListCtrl and one of my columns has lots and lots of text. Horizontal scrolling to the right is just not doing it. But if I could make the text go to a new line within that same item, then the user could read the CListCtrl clearly.

Please, please any response you can give me will be greatly appreciated.

Sincerely,
Danielle (an overworked graduate student)

Here's a stumper - 'fixing' text selection

Jason Hihn2-Oct-01 11:03

Jason Hihn

2-Oct-01 11:03

While not exactly a programming question, I'd like to know if you can turn off auto-word selection.
What I'm talking about is when you're programming and trying to select text and it will back-up the start and/or finish to whereever it thinks is appropriate. "Word selection" I think they call it. Can I disable this system-wide?

Thanks

read a single line from textfile

2-Oct-01 9:47

Hi
how can I read a single line from a text-file?
There should be read in so much characters until there is a carriage-return/line-feed.

How to do this?

Re: read a single line from textfile

C^hris L^osinger2-Oct-01 9:49

C^hris L^osinger

2-Oct-01 9:49

CFile::ReadString, fread, etc..

try the MSDN. search for "read a line from a file"

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Thanks!!

2-Oct-01 10:02

ReadString works fine Smile | :)

Thanks!

Re: read a single line from textfile

Peter Molnar2-Oct-01 10:45

Peter Molnar

2-Oct-01 10:45

There is a simple (and fast) solution for this in C

#include "stdio.h"

FILE *filepointer;
char line[100];
char *kar;
fp1 = fopen("yourfilenamewithpath", "r");
kar = fgets(line, 100, filepointer); //read one line
//kar = fscanf(p, "%s", word); reads just one word until next space
//kar = getc(filepointer); reads just one character
printf("%s", line);
fclose(filepointer);

Bunburry

Education is an admirable thing but it is well to remember from time to time that nothing that is worth knowing can be taught (O.Wilde)

Output window of Visual C++

Peter Molnar2-Oct-01 9:28

Peter Molnar

2-Oct-01 9:28

Sirs,

do you have an idea how to create a view like the output window of Visual C++ with white tabs and client area to write on? Roll eyes | :rolleyes:

Thank you for your kind help.

Bunburry

Education is an admirable thing but it is well to remember from time to time that nothing that is worth knowing can be taught (O.Wilde)

Re: Output window of Visual C++

Carlos Antollini2-Oct-01 9:30

Carlos Antollini

2-Oct-01 9:30

See into BCG control, you can find it into CodeProject

Cheers!!!

Carlos Antollini.

Create Dll in VC++ for client that works in Delphi

2-Oct-01 9:13

Delphi can not use my lib file so how can I provide dll that I wrote in vc++ to client that works in Delphi ????

My dll exporting c style functions that use in objects of c++ {classes).
So what can I do if I want to give this dll for Delphi ???

Confused | :confused:

Re: Create Dll in VC++ for client that works in Delphi

C^hris L^osinger2-Oct-01 9:48

C^hris L^osinger

2-Oct-01 9:48

non-MFC clients can only use plain C functions from DLLs. or, you could write it as a COM module. you cannot export C++ functions to non-C++ clients.

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Re: Create Dll in VC++ for client that works in Delphi

Tim Deveaux2-Oct-01 9:52

Tim Deveaux

2-Oct-01 9:52

Maybe these will help: (?)

http://www.drbob42.com/delphi/headconv.htm

http://www.mindspring.com/~cityzoo/tips/loadlib.txt

Thank you !!

2-Oct-01 11:09

Multimedia Timer question

RobJones2-Oct-01 8:10

RobJones

2-Oct-01 8:10

Hello,
I am trying to implement a multimedia timer in my app.. So far I think most of what I have done is correct but I am having a few problems.. I have been refrencing http://www.codeproject.com/system/timers_intro.asp#MMTimers and it has helped out quite a bit.. Here is what I have implemented so far..

OnStart()
{
     .
     .
     .
     // Set resolution to the minimum supported by the system
     TIMECAPS tc;
     timeGetDevCaps(&tc, sizeof(TIMECAPS));
     DWORD resolution = min(max(tc.wPeriodMin, 0), tc.wPeriodMax);
     timeBeginPeriod(resolution);     

    // create the timer
    timeSetEvent(iS,resolution,TimerFunction,(DWORD)this,TIME_PERIODIC);


void CTimerDlg::MMTimerHandler(UINT nIDEvent)
{
	//decrement the count
	iS --;
	//format and display the count
	m_timer2.Display(iS,iM,iH,iD,(CString)m_strTimer2="%D:%H:%M:%S");		
}


void CALLBACK TimerFunction(UINT wTimerID, UINT msg, DWORD dwUser, DWORD dw1, DWORD dw2)
{
    // This is used only to call MMTimerHandler
    // Typically, this function is static member of CTimersDlg
    CTimerDlg* obj = (CTimerDlg*) dwUser;
    obj->MMTimerHandler(wTimerID);

}

When compiling I get a error that states "'timeSetEvent' : cannot convert parameter 3 from 'void (unsigned int,unsigned int,unsigned long,unsigned long,unsigned long)' to 'void (__stdcall *)(unsigned i
nt,unsigned int,unsigned long,unsigned long,unsigned long)'"

Anyone know what the problem may be?

Thanks again for helping out!
Rob

Never Mind

RobJones2-Oct-01 11:03

RobJones

2-Oct-01 11:03

I figured it out.

What's wrong with this code?

2-Oct-01 8:05

I just thought this code is correct, but my app crashes. Here it is:

void Log()
{
	FILE *log;
	if((log = fopen("C:\\foo.log","a+t")) == NULL)
		return;

	
         SYSTEMTIME systime;
	GetSystemTime(&systime);

        
         // log time and date in european or at least german format like 1.10.2001 20:00
	char text[128];
	sprintf(text,"%s.%s.%s\t%s:%s",systime.wDay,systime.wMonth,systime.wYear,systime.wHour,systime.wMinute);

         
         // should write "text" into logfile, but crashes at "fwrite" :confused:
	size_t len = strlen(text);
	fwrite(text,sizeof(char),len,log);
	fclose(log);
}

any help is apreciated

Re: What's wrong with this code?

C^hris L^osinger2-Oct-01 8:21

C^hris L^osinger

2-Oct-01 8:21

what is 'len' ? (0? 10,1000,000 ?)

any chance you've overrun the 128 characters? (use snprintf to be safe).

also, why not just use fprintf, instead or using a temp buffer ?

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Re: What's wrong with this code?

Tim Deveaux2-Oct-01 8:52

Tim Deveaux

2-Oct-01 8:52

Oops - the SYSTEMTIME members are WORDs, not char*...

Re: What's wrong with this code?

Rashid Thadha2-Oct-01 9:49

Rashid Thadha

2-Oct-01 9:49

Alternative that I use --

void LogAuditMessage(DWORD nThreadID, LPCSTR szfmt, ...)
{  
  va_list args;
  va_start(args, szfmt);
  
  static bool bCheckDone(false);
  if (!bCheckDone)
  {
    // now check to see if todays date directory exist YYMMDD
    SYSTEMTIME Current;
    GetLocalTime(&Current);
    
    strcpy(m_cDateFormat, "");	
    sprintf(m_cDateFormat, "%04d%02d%02d", Current.wYear, Current.wMonth, Current.wDay);
    
    // create the main directory, if it does not exist
    if (!FileExists(".\\Audit\\."))
      _mkdir(".\\Audit");
    
    bCheckDone = true;
  }
  
  char sBuff[100] = "";
  sprintf(sBuff, ".\\Audit\\%s.log", m_cDateFormat);
  
  // Write to the logging file
  FILE* f;
  
  char szBuf[1024];
  char cTimeBuff[50] = "";
  _strtime(cTimeBuff);
  
  _vsnprintf(szBuf, 1024, szfmt , args);
  va_end(args);
  
  f = _tfopen(_T(sBuff), _T("a"));
  if (f != NULL)
  {
    _ftprintf(f, _T("%08x, %s, %s\n"), nThreadID, cTimeBuff, szBuf);
    fclose(f);
  }  
}

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