Constructing a parser - C / C++ / MFC Discussion Boards

Urgent help needed for printing the content of RichEditControl

P. Gnana Prakash10-Jun-05 1:20

10-Jun-05 1:20

Hi all,

I am developing dialog based application with RichEditControl. In my application, the requirement is send the richedit control data to the printer.

if any one have the snippet for the same, please let me know.

In mircrosoft site "http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/richedit/richeditcontrols/aboutricheditcontrols.asp" i found that using EM_FORMATRANGE and EM_DISPLAYBAND messages we can attain the print functionality. But i don't know how to implement it. If any one know please let me know.

Regards,
Gnanaprakash Ponnusamy

A Journey of thousand miles must begin with a single step.

Question about MultiThreading

Aqueel10-Jun-05 0:51

Aqueel

10-Jun-05 0:51

Hello
I am working with MultiThreading in MFC. I have written following piece in my code. But there is an error. Can anyone tell me why this error is comming.

Code is...

void CMyThreadrDlg::OnCreateThread()
{
if (m_check) // if check box is checked
{
int *i = new int(10000);
CWinThread *pThread = AfxBeginThread(getTime, i);
}
}

UINT CMyThreadDlg::getTime(LPVOID param)
{
DWORD result =0 ;

MessageBox("Thread created", "Success");

AfxEndThread(0);
return result;

}

Error is there where I have wrote,
CWinThread *pThread = AfxBeginThread(getTime, i);

Error Message is...

none of the 3 overloads can convert parameter 1 from type 'unsigned int (void *)'
Please help me

Thanks
Aqueel A. Mirza

We Believe in Excellence

Re: Question about MultiThreading

Cedric Moonen10-Jun-05 1:04

Cedric Moonen

10-Jun-05 1:04

The problem is that you pass to AfxBeginThread a member function of a class. This won't work because a member function does't not have the same calling convention as a standard function (the this pointer is passed implicitely).

Thus you need to use a global function. If your thread needs to access some member variables of the class that started the thread, you can pass the pointer to the class in the parameter:

UINT getTime(LPVOID param)<br />
{<br />
CMyThreadDlg* pDlg = (CMyThreadDlg*)param;<br />
<br />
//Do things with pDlg...<br />
<br />
//Don't need to call AfxEndThread because the thread will finish automatically when this function returns<br />
return 0;<br />
}<br />

And to spawn the thread:

void CMyThreadrDlg::OnCreateThread() <br />
{<br />
if (m_check) // if check box is checked<br />
{<br />
CWinThread *pThread = AfxBeginThread(getTime, this);  // pass the this pointer in the argument<br />
}<br />
}<br />

Also, you don't need to call AfxEndThread before leaving the thread function because the thread will automatically finishes when this function exits.

Re: Question about MultiThreading

Stlan10-Jun-05 1:14

Stlan

10-Jun-05 1:14

But if you want absolutely that the thread procedure be a member of the class, there is a simple solution: declare the thread procedure as static function member and pass this pointer as parameter to the thread, so that you are able to call a non-static member function of the class as true thread procedure.

class A<br />
{<br />
  public:<br />
  VOID StartThread();<br />
<br />
  private:<br />
  static LRESULT ThreadProc(LPVOID pParam);<br />
  VOID DoThread();<br />
}<br />
<br />
VOID A::StartThread()<br />
{<br />
  AfxBeginThread(ThreadProc, this);<br />
}<br />
<br />
LRESULT A::ThreadProc (LPVOID pParam)<br />
{<br />
  A *This = (A*)pParam;<br />
  This->DoThread();<br />
  return 0L;<br />
}<br />
<br />
VOID A::DoThread()<br />
{<br />
  // Do something here...<br />
}

Re: Question about MultiThreading

Cedric Moonen10-Jun-05 2:06

Cedric Moonen

10-Jun-05 2:06

Yes of course...
But the only advantage I see in this method is to avoid having a global function. Is there any other advantage ?

Re: Question about MultiThreading

Stlan10-Jun-05 2:19

Stlan

10-Jun-05 2:19

It's perhaps only a matter of design but I assume that the worker thread is part of the object and is related to its internal working. So for me, it makes sense that the thread procedure be physically a function member of the class so that it can access to other private data (which the global function can't) Anyway I don't like too much global functions in C++.

Re: Question about MultiThreading

David Crow10-Jun-05 6:19

David Crow

10-Jun-05 6:19

See here.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Constructing a parser

dittygrail9-Jun-05 23:33

dittygrail

9-Jun-05 23:33

I need to construct a parser.My application is in MFC.
How to build a parser with simple construction procedure.
It also has to applicable for the project objects.
please avoid the concept of Activex scripting...

Re: Constructing a parser

Stlan10-Jun-05 0:11

Stlan

10-Jun-05 0:11

Not sure to understand what you mean. If you need to parse a string containing items separated by known constant characters, it may be sufficient to use CString::Tokenize; then you need to build a structure representing the logical content of the string, so that it will be easier then to manipulate the data. It's actually a very vast subject.

Re: Constructing a parser

toxcct10-Jun-05 0:24

toxcct

10-Jun-05 0:24

not sure i understand neither, but if you want a not too difficult method to parsing a language, you could read my article VisualCalc...

cheers,

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Constructing a parser

toxcct10-Jun-05 1:31

toxcct

10-Jun-05 1:31

CodeProject Parsers...[^]

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Constructing a parser

ThatsAlok10-Jun-05 1:41

ThatsAlok

10-Jun-05 1:41

You getting very fast these days, How dare, you use your HAND for TYPING! Mad | :mad:

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Constructing a parser

ThatsAlok10-Jun-05 1:35

ThatsAlok

10-Jun-05 1:35

dittygrail wrote:
I need to construct a parser.My application is in MFC.

What type of Parser do u want to Create, i.e. XML parser, HTML parser etc.....

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Constructing a parser

toxcct10-Jun-05 1:49

toxcct

10-Jun-05 1:49

ThatsAlok wrote:
What type of Parser do u want to Create, i.e. XML parser, HTML parser etc.....

no, only a parser !!! Laugh | :laugh:

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Constructing a parser

ThatsAlok10-Jun-05 1:54

ThatsAlok

10-Jun-05 1:54

toxcct wrote:
only a parser

Sigh | :sigh:

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Constructing a parser

Stlan10-Jun-05 1:58

Stlan

10-Jun-05 1:58

With both you discussing here, this is the most colorful message thread I've ever seen on CP Smile | :)

Re: Constructing a parser

ThatsAlok10-Jun-05 2:04

ThatsAlok

10-Jun-05 2:04

Stlan wrote:
With both you discussing here, this is the most colorful message thread I've ever seen on CP

We are Here (Including you) to make life of programmer Colorful Smile | :)

you too can color your USERNAME in Red Smile | :)

, which i believe i have already colored Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Constructing a parser

Stlan10-Jun-05 2:22

Stlan

10-Jun-05 2:22

Oh my! I became a member of the club of the colorful people! So cool! Cool | :cool:

Re: Constructing a parser

ThatsAlok10-Jun-05 2:25

ThatsAlok

10-Jun-05 2:25

Stlan wrote:
Oh my! I became a member of the club of the colorful people! So

But you forget to color your username, Don't worry for this time, I have colored that for you. But this is last time Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Bob Stanneveld10-Jun-05 2:44

Bob Stanneveld

10-Jun-05 2:44

ThatsAlok wrote:
I have colored that for you

How do you color your username?

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: OT

ThatsAlok10-Jun-05 2:52

ThatsAlok

10-Jun-05 2:52

Bob Stanneveld wrote:
How do you color your username?

use HTML tags like this, if you want to color you username RED

<b> <font color=#ff0000>Bob Stanneveld </font></b>

which make your username something like this :-
Bob Stanneveld

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: OT

Bob Stanneveld10-Jun-05 2:54

Bob Stanneveld

10-Jun-05 2:54

I thought that the HTML tags didn't work inside your username. Guess it does. Thanks! Big Grin | :-D

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: OT

ThatsAlok10-Jun-05 2:55

ThatsAlok

10-Jun-05 2:55

Bob Stanneveld wrote:
Guess it does.

So whats your new color Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: OT

Bob Stanneveld10-Jun-05 2:58

Bob Stanneveld

10-Jun-05 2:58

Nothing special yet. My favorite colours are already taken, blue by you and black by everyone else who doesn't bother to change the colour of their name... Unsure | :~

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: OT

toxcct10-Jun-05 5:18

toxcct

10-Jun-05 5:18

you could glow you name so...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

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