C / C++ / MFC

14-Apr-04 23:19

why not simply

CString nx ;

while (port.Read(cReceivedChar, 1 , overlapped, &dwBytesRead)) // 1 is number of bytes read from port, how to make this variable?

{
nx += cReceivedChar[1];
}

AfxMessageBox(nx);

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: serial port

macmac3815-Apr-04 1:43

macmac38

15-Apr-04 1:43

Hmm, the output now is like: |||||||||

and how can i extract the three values?

Thanks, Mark

Re: serial port

jmkhael15-Apr-04 2:26

What is a wrapper class ?

15-Apr-04 2:26

Check the string tokenizer classes on CP
The main idea, let the comma be your separator and take the values between and convert them to float or double using atof

Remeber to clean the string on each new triplet received, i mean each time you receive (x, y, z) clean your string, of course after doing the processing

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Deepak Samuel14-Apr-04 22:34

Deepak Samuel

14-Apr-04 22:34

Hi,
I am new to programing . I often come across the word "Wrapper class" in some books. What is it?.
What is a type library? When I open a *.tlb, I see a whole chunk of hexadecimal display.
Thanks.

Deepak Samuel

Re: What is a wrapper class ?

Prakash Nadar14-Apr-04 23:23

Prakash Nadar

14-Apr-04 23:23

wraper class as a short example.

win32 programming

HWND hWnd;
hWnd = createwindow(...);
ShowWindow(hWnd,...);

Wrapper to window (HWND)

class Window
{
  HWND hWnd;
  int CreateWindow(...)
  {
     hWnd = CreateWindow(....);
  }

  int ShowWindow(...)
  {
     ShowWindow(hWnd,...);
  }
}

As you see i wrapped HWND with a class, hence its a wrapper class.

Re: What is a wrapper class ?

jmkhael15-Apr-04 0:25

Re: What is a wrapper class ?

15-Apr-04 0:25

As for tlb files you can view them with the Visual C++ tool OLE/COM object viewer

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Michael P Butler15-Apr-04 0:28

Michael P Butler

15-Apr-04 0:28

Deepak Samuel wrote:
What is a type library? When I open a *.tlb, I see a whole chunk of hexadecimal display.

A .tlb is used to describe the methods and properties of a COM object.

You can use #import to create a C++ wrapper class for the type library or you can view the details of the type library using the OLEView too that comes with Visual Studio.

Michael

But you know when the truth is told,
That you can get what you want or you can just get old,
Your're going to kick off before you even get halfway through.
When will you realise... Vienna waits for you? - "The Stranger," Billy Joel

Writing File

Anonymous14-Apr-04 22:09

Anonymous

14-Apr-04 22:09

I use this :
CFile FileName(m_csTemp,CFile::modeCreate | CFile::modeWrite);
to create a file. This expression erase all of the existing files which have the same name. Is there a function which allow to see if a file with the same name already exists ?

Thank's for advance.

wb14-Apr-04 22:26

14-Apr-04 22:26

CFileStatus

jmkhael14-Apr-04 22:37

14-Apr-04 22:37

Try to open it for read, if it fails means it doesnt exist

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

22491714-Apr-04 23:19

224917

14-Apr-04 23:19

use
BOOL PathFileExists(LPCTSTR pszPath);

or to open without deleting

if(!file.Open(strFileName,CFile::modeReadWrite|CFile::modeCreate|CFile::modeNoTruncate,&exF))
return 0;

suhredayan@omniquad.com

messenger :suhredayan@hotmail.com

David Crow15-Apr-04 2:54

David Crow

15-Apr-04 2:54

Anonymous wrote:
Is there a function which allow to see if a file with the same name already exists ?

_access() is but one method of doing that.

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

Header files :o(((

doctorpi14-Apr-04 21:19

14-Apr-04 21:19

Hi guys
I have a class called CListCtrlEx and inside I want to have a pointer to a CMyDialog
Inside CMyDialog I have a CListCtrlEx member.
I tried many solutions but always receive an error message due to the cross refreneces of ine class to the other. What is the right procedure (#includes in .h or .cpp) to have a pointer of CMyDialog in CListCtrlEx.h and a CListCtrlEx member in CMydialog.h
I'm going crazy with this silly mistake.
Simplifying
In CListCtrlEx.h : CMyDialog *m_pMyDialog;
In CMyDialog.h : CListCtrlEx m_lstMyList;

Thanks
Doc

toxcct14-Apr-04 21:28

14-Apr-04 21:28

you can put either #includes into .cpp or .h (depends on how you create your headers also/ what are needed in your headers).

ben careful you have exclusive preprocessor directives in your header to avoid that sort of recursive definitions :

CMydialog.h
<font style="color:blue;">#if</font> !<font style="color:blue;">defined</font>(__CMYDIALOG_H_INCLUDED__)
<font style="color:blue;">#define</font>      __CMYDIALOG_H_INCLUDED__
 
<font style="color:green;">//...</font>
 
<font style="color:blue;">#endif</font> <font style="color:green;">//__CMYDIALOG_H_INCLUDED__</font>

TOXCCT >>> GEII power

doctorpi14-Apr-04 21:42

14-Apr-04 21:42

I've got the following
In ListCtrlEx.h

class CMyDialog;

CMyDialog *m_pMyDialog;

In ListCtrlEx.cpp
#include "MyDialog.h"
----------
In CMyDialog.h

#include "ListCtrlEx.h"

CListCtrlEx m_lstMyList;

I always receive this error

error C2065: 'IDD_CE_GENERAL' : undeclared identifier
C:\Whatever...\MyDialog.h(25) : error C2057: expected constant expression

Do you see the problem? I can't Blush | :O

((
Thanks again
Doc

toxcct14-Apr-04 21:51

14-Apr-04 21:51

perhaps you also need an extern keyword, to tell the compiler that you use a variable in a file, but that variable is defined in another file.

what is IDD_CE_GENERAL ??

TOXCCT >>> GEII power

doctorpi14-Apr-04 21:53

14-Apr-04 21:53

Is the general dialog IDD.

// Dialog Data
//{{AFX_DATA(CStatsGenCE)
enum { IDD = IDD_ESTAD_CE_GENERAL };

//}}AFX_DATA

toxcct14-Apr-04 21:56

14-Apr-04 21:56

haven't you modified some lines dangerously ?

IDD_ESTAD_CE_GENERAL != IDD_CE_GENERAL

TOXCCT >>> GEII power

doctorpi14-Apr-04 21:58

14-Apr-04 21:58

Not at all, sorry my fault, It has only modified in the posts.
IDD_ESTAD_CE_GENERAL is the good one.
All is coherent in the code.
I'm lost Blush | :O

(((
Thanks
Doc

toxcct14-Apr-04 22:02

14-Apr-04 22:02

sorry, i'm lost too...

maybe with more explanation, but nop, can't help you man

TOXCCT >>> GEII power

doctorpi14-Apr-04 22:04

14-Apr-04 22:04

I've found it!!!
The problem is that IDD_ESTAD_CE_GENERAL value cannot be accesed by my class (I don't know why)
Maybe is not a good solution but I've substituted IDD_ESTAD_CE_GENERAL for his value and all is working correctly.
This value is always the same,isn't it?
Thanks pal for your time.
Doc

toxcct14-Apr-04 22:06

14-Apr-04 22:06

as you say, not a very good solution !

try to find out why this was nos accessible....

TOXCCT >>> GEII power

Michael P Butler14-Apr-04 22:28

Michael P Butler

14-Apr-04 22:28

doctorpi wrote:
error C2065: 'IDD_CE_GENERAL' : undeclared identifier
C:\Whatever...\MyDialog.h(25) : error C2057: expected constant expression

IDD_CE_GENERAL will be defined in your resource.h file. Make sure that you #include "resource.h" in your include tree. You can place it in your MyDialog.h header.

Michael

But you know when the truth is told,
That you can get what you want or you can just get old,
Your're going to kick off before you even get halfway through.
When will you realise... Vienna waits for you? - "The Stranger," Billy Joel

doctorpi15-Apr-04 0:10